/[pcre]/code/trunk/pcregrep.c
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Revision 1492 - (show annotations) (download)
Tue Jul 8 16:16:14 2014 UTC (2 weeks, 4 days ago) by ph10
File MIME type: text/plain
File size: 95139 byte(s)
Fixed several memory leaks in pcregrep.

1 /*************************************************
2 * pcregrep program *
3 *************************************************/
4
5 /* This is a grep program that uses the PCRE regular expression library to do
6 its pattern matching. On Unix-like, Windows, and native z/OS systems it can
7 recurse into directories, and in z/OS it can handle PDS files.
8
9 Note that for native z/OS, in addition to defining the NATIVE_ZOS macro, an
10 additional header is required. That header is not included in the main PCRE
11 distribution because other apparatus is needed to compile pcregrep for z/OS.
12 The header can be found in the special z/OS distribution, which is available
13 from www.zaconsultants.net or from www.cbttape.org.
14
15 Copyright (c) 1997-2014 University of Cambridge
16
17 -----------------------------------------------------------------------------
18 Redistribution and use in source and binary forms, with or without
19 modification, are permitted provided that the following conditions are met:
20
21 * Redistributions of source code must retain the above copyright notice,
22 this list of conditions and the following disclaimer.
23
24 * Redistributions in binary form must reproduce the above copyright
25 notice, this list of conditions and the following disclaimer in the
26 documentation and/or other materials provided with the distribution.
27
28 * Neither the name of the University of Cambridge nor the names of its
29 contributors may be used to endorse or promote products derived from
30 this software without specific prior written permission.
31
32 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
33 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
36 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
37 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
40 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 POSSIBILITY OF SUCH DAMAGE.
43 -----------------------------------------------------------------------------
44 */
45
46 #ifdef HAVE_CONFIG_H
47 #include "config.h"
48 #endif
49
50 #include <ctype.h>
51 #include <locale.h>
52 #include <stdio.h>
53 #include <string.h>
54 #include <stdlib.h>
55 #include <errno.h>
56
57 #include <sys/types.h>
58 #include <sys/stat.h>
59
60 #ifdef HAVE_UNISTD_H
61 #include <unistd.h>
62 #endif
63
64 #ifdef SUPPORT_LIBZ
65 #include <zlib.h>
66 #endif
67
68 #ifdef SUPPORT_LIBBZ2
69 #include <bzlib.h>
70 #endif
71
72 #include "pcre.h"
73
74 #define FALSE 0
75 #define TRUE 1
76
77 typedef int BOOL;
78
79 #define OFFSET_SIZE 99
80
81 #if BUFSIZ > 8192
82 #define MAXPATLEN BUFSIZ
83 #else
84 #define MAXPATLEN 8192
85 #endif
86
87 #define PATBUFSIZE (MAXPATLEN + 10) /* Allows for prefix+suffix */
88
89 /* Values for the "filenames" variable, which specifies options for file name
90 output. The order is important; it is assumed that a file name is wanted for
91 all values greater than FN_DEFAULT. */
92
93 enum { FN_NONE, FN_DEFAULT, FN_MATCH_ONLY, FN_NOMATCH_ONLY, FN_FORCE };
94
95 /* File reading styles */
96
97 enum { FR_PLAIN, FR_LIBZ, FR_LIBBZ2 };
98
99 /* Actions for the -d and -D options */
100
101 enum { dee_READ, dee_SKIP, dee_RECURSE };
102 enum { DEE_READ, DEE_SKIP };
103
104 /* Actions for special processing options (flag bits) */
105
106 #define PO_WORD_MATCH 0x0001
107 #define PO_LINE_MATCH 0x0002
108 #define PO_FIXED_STRINGS 0x0004
109
110 /* Line ending types */
111
112 enum { EL_LF, EL_CR, EL_CRLF, EL_ANY, EL_ANYCRLF };
113
114 /* Binary file options */
115
116 enum { BIN_BINARY, BIN_NOMATCH, BIN_TEXT };
117
118 /* In newer versions of gcc, with FORTIFY_SOURCE set (the default in some
119 environments), a warning is issued if the value of fwrite() is ignored.
120 Unfortunately, casting to (void) does not suppress the warning. To get round
121 this, we use a macro that compiles a fudge. Oddly, this does not also seem to
122 apply to fprintf(). */
123
124 #define FWRITE(a,b,c,d) if (fwrite(a,b,c,d)) {}
125
126
127
128 /*************************************************
129 * Global variables *
130 *************************************************/
131
132 /* Jeffrey Friedl has some debugging requirements that are not part of the
133 regular code. */
134
135 #ifdef JFRIEDL_DEBUG
136 static int S_arg = -1;
137 static unsigned int jfriedl_XR = 0; /* repeat regex attempt this many times */
138 static unsigned int jfriedl_XT = 0; /* replicate text this many times */
139 static const char *jfriedl_prefix = "";
140 static const char *jfriedl_postfix = "";
141 #endif
142
143 static int endlinetype;
144
145 static char *colour_string = (char *)"1;31";
146 static char *colour_option = NULL;
147 static char *dee_option = NULL;
148 static char *DEE_option = NULL;
149 static char *locale = NULL;
150 static char *main_buffer = NULL;
151 static char *newline = NULL;
152 static char *om_separator = (char *)"";
153 static char *stdin_name = (char *)"(standard input)";
154
155 static const unsigned char *pcretables = NULL;
156
157 static int after_context = 0;
158 static int before_context = 0;
159 static int binary_files = BIN_BINARY;
160 static int both_context = 0;
161 static int bufthird = PCREGREP_BUFSIZE;
162 static int bufsize = 3*PCREGREP_BUFSIZE;
163
164 #if defined HAVE_WINDOWS_H && HAVE_WINDOWS_H
165 static int dee_action = dee_SKIP;
166 #else
167 static int dee_action = dee_READ;
168 #endif
169
170 static int DEE_action = DEE_READ;
171 static int error_count = 0;
172 static int filenames = FN_DEFAULT;
173 static int pcre_options = 0;
174 static int process_options = 0;
175
176 #ifdef SUPPORT_PCREGREP_JIT
177 static int study_options = PCRE_STUDY_JIT_COMPILE;
178 #else
179 static int study_options = 0;
180 #endif
181
182 static unsigned long int match_limit = 0;
183 static unsigned long int match_limit_recursion = 0;
184
185 static BOOL count_only = FALSE;
186 static BOOL do_colour = FALSE;
187 static BOOL file_offsets = FALSE;
188 static BOOL hyphenpending = FALSE;
189 static BOOL invert = FALSE;
190 static BOOL line_buffered = FALSE;
191 static BOOL line_offsets = FALSE;
192 static BOOL multiline = FALSE;
193 static BOOL number = FALSE;
194 static BOOL omit_zero_count = FALSE;
195 static BOOL resource_error = FALSE;
196 static BOOL quiet = FALSE;
197 static BOOL show_only_matching = FALSE;
198 static BOOL silent = FALSE;
199 static BOOL utf8 = FALSE;
200
201 /* Structure for list of --only-matching capturing numbers. */
202
203 typedef struct omstr {
204 struct omstr *next;
205 int groupnum;
206 } omstr;
207
208 static omstr *only_matching = NULL;
209 static omstr *only_matching_last = NULL;
210
211 /* Structure for holding the two variables that describe a number chain. */
212
213 typedef struct omdatastr {
214 omstr **anchor;
215 omstr **lastptr;
216 } omdatastr;
217
218 static omdatastr only_matching_data = { &only_matching, &only_matching_last };
219
220 /* Structure for list of file names (for -f and --{in,ex}clude-from) */
221
222 typedef struct fnstr {
223 struct fnstr *next;
224 char *name;
225 } fnstr;
226
227 static fnstr *exclude_from = NULL;
228 static fnstr *exclude_from_last = NULL;
229 static fnstr *include_from = NULL;
230 static fnstr *include_from_last = NULL;
231
232 static fnstr *file_lists = NULL;
233 static fnstr *file_lists_last = NULL;
234 static fnstr *pattern_files = NULL;
235 static fnstr *pattern_files_last = NULL;
236
237 /* Structure for holding the two variables that describe a file name chain. */
238
239 typedef struct fndatastr {
240 fnstr **anchor;
241 fnstr **lastptr;
242 } fndatastr;
243
244 static fndatastr exclude_from_data = { &exclude_from, &exclude_from_last };
245 static fndatastr include_from_data = { &include_from, &include_from_last };
246 static fndatastr file_lists_data = { &file_lists, &file_lists_last };
247 static fndatastr pattern_files_data = { &pattern_files, &pattern_files_last };
248
249 /* Structure for pattern and its compiled form; used for matching patterns and
250 also for include/exclude patterns. */
251
252 typedef struct patstr {
253 struct patstr *next;
254 char *string;
255 pcre *compiled;
256 pcre_extra *hint;
257 } patstr;
258
259 static patstr *patterns = NULL;
260 static patstr *patterns_last = NULL;
261 static patstr *include_patterns = NULL;
262 static patstr *include_patterns_last = NULL;
263 static patstr *exclude_patterns = NULL;
264 static patstr *exclude_patterns_last = NULL;
265 static patstr *include_dir_patterns = NULL;
266 static patstr *include_dir_patterns_last = NULL;
267 static patstr *exclude_dir_patterns = NULL;
268 static patstr *exclude_dir_patterns_last = NULL;
269
270 /* Structure holding the two variables that describe a pattern chain. A pointer
271 to such structures is used for each appropriate option. */
272
273 typedef struct patdatastr {
274 patstr **anchor;
275 patstr **lastptr;
276 } patdatastr;
277
278 static patdatastr match_patdata = { &patterns, &patterns_last };
279 static patdatastr include_patdata = { &include_patterns, &include_patterns_last };
280 static patdatastr exclude_patdata = { &exclude_patterns, &exclude_patterns_last };
281 static patdatastr include_dir_patdata = { &include_dir_patterns, &include_dir_patterns_last };
282 static patdatastr exclude_dir_patdata = { &exclude_dir_patterns, &exclude_dir_patterns_last };
283
284 static patstr **incexlist[4] = { &include_patterns, &exclude_patterns,
285 &include_dir_patterns, &exclude_dir_patterns };
286
287 static const char *incexname[4] = { "--include", "--exclude",
288 "--include-dir", "--exclude-dir" };
289
290 /* Structure for options and list of them */
291
292 enum { OP_NODATA, OP_STRING, OP_OP_STRING, OP_NUMBER, OP_LONGNUMBER,
293 OP_OP_NUMBER, OP_OP_NUMBERS, OP_PATLIST, OP_FILELIST, OP_BINFILES };
294
295 typedef struct option_item {
296 int type;
297 int one_char;
298 void *dataptr;
299 const char *long_name;
300 const char *help_text;
301 } option_item;
302
303 /* Options without a single-letter equivalent get a negative value. This can be
304 used to identify them. */
305
306 #define N_COLOUR (-1)
307 #define N_EXCLUDE (-2)
308 #define N_EXCLUDE_DIR (-3)
309 #define N_HELP (-4)
310 #define N_INCLUDE (-5)
311 #define N_INCLUDE_DIR (-6)
312 #define N_LABEL (-7)
313 #define N_LOCALE (-8)
314 #define N_NULL (-9)
315 #define N_LOFFSETS (-10)
316 #define N_FOFFSETS (-11)
317 #define N_LBUFFER (-12)
318 #define N_M_LIMIT (-13)
319 #define N_M_LIMIT_REC (-14)
320 #define N_BUFSIZE (-15)
321 #define N_NOJIT (-16)
322 #define N_FILE_LIST (-17)
323 #define N_BINARY_FILES (-18)
324 #define N_EXCLUDE_FROM (-19)
325 #define N_INCLUDE_FROM (-20)
326 #define N_OM_SEPARATOR (-21)
327
328 static option_item optionlist[] = {
329 { OP_NODATA, N_NULL, NULL, "", "terminate options" },
330 { OP_NODATA, N_HELP, NULL, "help", "display this help and exit" },
331 { OP_NUMBER, 'A', &after_context, "after-context=number", "set number of following context lines" },
332 { OP_NODATA, 'a', NULL, "text", "treat binary files as text" },
333 { OP_NUMBER, 'B', &before_context, "before-context=number", "set number of prior context lines" },
334 { OP_BINFILES, N_BINARY_FILES, NULL, "binary-files=word", "set treatment of binary files" },
335 { OP_NUMBER, N_BUFSIZE,&bufthird, "buffer-size=number", "set processing buffer size parameter" },
336 { OP_OP_STRING, N_COLOUR, &colour_option, "color=option", "matched text color option" },
337 { OP_OP_STRING, N_COLOUR, &colour_option, "colour=option", "matched text colour option" },
338 { OP_NUMBER, 'C', &both_context, "context=number", "set number of context lines, before & after" },
339 { OP_NODATA, 'c', NULL, "count", "print only a count of matching lines per FILE" },
340 { OP_STRING, 'D', &DEE_option, "devices=action","how to handle devices, FIFOs, and sockets" },
341 { OP_STRING, 'd', &dee_option, "directories=action", "how to handle directories" },
342 { OP_PATLIST, 'e', &match_patdata, "regex(p)=pattern", "specify pattern (may be used more than once)" },
343 { OP_NODATA, 'F', NULL, "fixed-strings", "patterns are sets of newline-separated strings" },
344 { OP_FILELIST, 'f', &pattern_files_data, "file=path", "read patterns from file" },
345 { OP_FILELIST, N_FILE_LIST, &file_lists_data, "file-list=path","read files to search from file" },
346 { OP_NODATA, N_FOFFSETS, NULL, "file-offsets", "output file offsets, not text" },
347 { OP_NODATA, 'H', NULL, "with-filename", "force the prefixing filename on output" },
348 { OP_NODATA, 'h', NULL, "no-filename", "suppress the prefixing filename on output" },
349 { OP_NODATA, 'I', NULL, "", "treat binary files as not matching (ignore)" },
350 { OP_NODATA, 'i', NULL, "ignore-case", "ignore case distinctions" },
351 #ifdef SUPPORT_PCREGREP_JIT
352 { OP_NODATA, N_NOJIT, NULL, "no-jit", "do not use just-in-time compiler optimization" },
353 #else
354 { OP_NODATA, N_NOJIT, NULL, "no-jit", "ignored: this pcregrep does not support JIT" },
355 #endif
356 { OP_NODATA, 'l', NULL, "files-with-matches", "print only FILE names containing matches" },
357 { OP_NODATA, 'L', NULL, "files-without-match","print only FILE names not containing matches" },
358 { OP_STRING, N_LABEL, &stdin_name, "label=name", "set name for standard input" },
359 { OP_NODATA, N_LBUFFER, NULL, "line-buffered", "use line buffering" },
360 { OP_NODATA, N_LOFFSETS, NULL, "line-offsets", "output line numbers and offsets, not text" },
361 { OP_STRING, N_LOCALE, &locale, "locale=locale", "use the named locale" },
362 { OP_LONGNUMBER, N_M_LIMIT, &match_limit, "match-limit=number", "set PCRE match limit option" },
363 { OP_LONGNUMBER, N_M_LIMIT_REC, &match_limit_recursion, "recursion-limit=number", "set PCRE match recursion limit option" },
364 { OP_NODATA, 'M', NULL, "multiline", "run in multiline mode" },
365 { OP_STRING, 'N', &newline, "newline=type", "set newline type (CR, LF, CRLF, ANYCRLF or ANY)" },
366 { OP_NODATA, 'n', NULL, "line-number", "print line number with output lines" },
367 { OP_OP_NUMBERS, 'o', &only_matching_data, "only-matching=n", "show only the part of the line that matched" },
368 { OP_STRING, N_OM_SEPARATOR, &om_separator, "om-separator=text", "set separator for multiple -o output" },
369 { OP_NODATA, 'q', NULL, "quiet", "suppress output, just set return code" },
370 { OP_NODATA, 'r', NULL, "recursive", "recursively scan sub-directories" },
371 { OP_PATLIST, N_EXCLUDE,&exclude_patdata, "exclude=pattern","exclude matching files when recursing" },
372 { OP_PATLIST, N_INCLUDE,&include_patdata, "include=pattern","include matching files when recursing" },
373 { OP_PATLIST, N_EXCLUDE_DIR,&exclude_dir_patdata, "exclude-dir=pattern","exclude matching directories when recursing" },
374 { OP_PATLIST, N_INCLUDE_DIR,&include_dir_patdata, "include-dir=pattern","include matching directories when recursing" },
375 { OP_FILELIST, N_EXCLUDE_FROM,&exclude_from_data, "exclude-from=path", "read exclude list from file" },
376 { OP_FILELIST, N_INCLUDE_FROM,&include_from_data, "include-from=path", "read include list from file" },
377
378 /* These two were accidentally implemented with underscores instead of
379 hyphens in the option names. As this was not discovered for several releases,
380 the incorrect versions are left in the table for compatibility. However, the
381 --help function misses out any option that has an underscore in its name. */
382
383 { OP_PATLIST, N_EXCLUDE_DIR,&exclude_dir_patdata, "exclude_dir=pattern","exclude matching directories when recursing" },
384 { OP_PATLIST, N_INCLUDE_DIR,&include_dir_patdata, "include_dir=pattern","include matching directories when recursing" },
385
386 #ifdef JFRIEDL_DEBUG
387 { OP_OP_NUMBER, 'S', &S_arg, "jeffS", "replace matched (sub)string with X" },
388 #endif
389 { OP_NODATA, 's', NULL, "no-messages", "suppress error messages" },
390 { OP_NODATA, 'u', NULL, "utf-8", "use UTF-8 mode" },
391 { OP_NODATA, 'V', NULL, "version", "print version information and exit" },
392 { OP_NODATA, 'v', NULL, "invert-match", "select non-matching lines" },
393 { OP_NODATA, 'w', NULL, "word-regex(p)", "force patterns to match only as words" },
394 { OP_NODATA, 'x', NULL, "line-regex(p)", "force patterns to match only whole lines" },
395 { OP_NODATA, 0, NULL, NULL, NULL }
396 };
397
398 /* Tables for prefixing and suffixing patterns, according to the -w, -x, and -F
399 options. These set the 1, 2, and 4 bits in process_options, respectively. Note
400 that the combination of -w and -x has the same effect as -x on its own, so we
401 can treat them as the same. Note that the MAXPATLEN macro assumes the longest
402 prefix+suffix is 10 characters; if anything longer is added, it must be
403 adjusted. */
404
405 static const char *prefix[] = {
406 "", "\\b", "^(?:", "^(?:", "\\Q", "\\b\\Q", "^(?:\\Q", "^(?:\\Q" };
407
408 static const char *suffix[] = {
409 "", "\\b", ")$", ")$", "\\E", "\\E\\b", "\\E)$", "\\E)$" };
410
411 /* UTF-8 tables - used only when the newline setting is "any". */
412
413 const int utf8_table3[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};
414
415 const char utf8_table4[] = {
416 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
417 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
418 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
419 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 };
420
421
422
423 /*************************************************
424 * Exit from the program *
425 *************************************************/
426
427 /* If there has been a resource error, give a suitable message.
428
429 Argument: the return code
430 Returns: does not return
431 */
432
433 static void
434 pcregrep_exit(int rc)
435 {
436 if (resource_error)
437 {
438 fprintf(stderr, "pcregrep: Error %d, %d or %d means that a resource limit "
439 "was exceeded.\n", PCRE_ERROR_MATCHLIMIT, PCRE_ERROR_RECURSIONLIMIT,
440 PCRE_ERROR_JIT_STACKLIMIT);
441 fprintf(stderr, "pcregrep: Check your regex for nested unlimited loops.\n");
442 }
443 exit(rc);
444 }
445
446
447 /*************************************************
448 * Add item to chain of patterns *
449 *************************************************/
450
451 /* Used to add an item onto a chain, or just return an unconnected item if the
452 "after" argument is NULL.
453
454 Arguments:
455 s pattern string to add
456 after if not NULL points to item to insert after
457
458 Returns: new pattern block or NULL on error
459 */
460
461 static patstr *
462 add_pattern(char *s, patstr *after)
463 {
464 patstr *p = (patstr *)malloc(sizeof(patstr));
465 if (p == NULL)
466 {
467 fprintf(stderr, "pcregrep: malloc failed\n");
468 pcregrep_exit(2);
469 }
470 if (strlen(s) > MAXPATLEN)
471 {
472 fprintf(stderr, "pcregrep: pattern is too long (limit is %d bytes)\n",
473 MAXPATLEN);
474 free(p);
475 return NULL;
476 }
477 p->next = NULL;
478 p->string = s;
479 p->compiled = NULL;
480 p->hint = NULL;
481
482 if (after != NULL)
483 {
484 p->next = after->next;
485 after->next = p;
486 }
487 return p;
488 }
489
490
491 /*************************************************
492 * Free chain of patterns *
493 *************************************************/
494
495 /* Used for several chains of patterns.
496
497 Argument: pointer to start of chain
498 Returns: nothing
499 */
500
501 static void
502 free_pattern_chain(patstr *pc)
503 {
504 while (pc != NULL)
505 {
506 patstr *p = pc;
507 pc = p->next;
508 if (p->hint != NULL) pcre_free_study(p->hint);
509 if (p->compiled != NULL) pcre_free(p->compiled);
510 free(p);
511 }
512 }
513
514
515 /*************************************************
516 * Free chain of file names *
517 *************************************************/
518
519 /*
520 Argument: pointer to start of chain
521 Returns: nothing
522 */
523
524 static void
525 free_file_chain(fnstr *fn)
526 {
527 while (fn != NULL)
528 {
529 fnstr *f = fn;
530 fn = f->next;
531 free(f);
532 }
533 }
534
535
536 /*************************************************
537 * OS-specific functions *
538 *************************************************/
539
540 /* These functions are defined so that they can be made system specific.
541 At present there are versions for Unix-style environments, Windows, native
542 z/OS, and "no support". */
543
544
545 /************* Directory scanning Unix-style and z/OS ***********/
546
547 #if (defined HAVE_SYS_STAT_H && defined HAVE_DIRENT_H && defined HAVE_SYS_TYPES_H) || defined NATIVE_ZOS
548 #include <sys/types.h>
549 #include <sys/stat.h>
550 #include <dirent.h>
551
552 #if defined NATIVE_ZOS
553 /************* Directory and PDS/E scanning for z/OS ***********/
554 /************* z/OS looks mostly like Unix with USS ************/
555 /* However, z/OS needs the #include statements in this header */
556 #include "pcrzosfs.h"
557 /* That header is not included in the main PCRE distribution because
558 other apparatus is needed to compile pcregrep for z/OS. The header
559 can be found in the special z/OS distribution, which is available
560 from www.zaconsultants.net or from www.cbttape.org. */
561 #endif
562
563 typedef DIR directory_type;
564 #define FILESEP '/'
565
566 static int
567 isdirectory(char *filename)
568 {
569 struct stat statbuf;
570 if (stat(filename, &statbuf) < 0)
571 return 0; /* In the expectation that opening as a file will fail */
572 return (statbuf.st_mode & S_IFMT) == S_IFDIR;
573 }
574
575 static directory_type *
576 opendirectory(char *filename)
577 {
578 return opendir(filename);
579 }
580
581 static char *
582 readdirectory(directory_type *dir)
583 {
584 for (;;)
585 {
586 struct dirent *dent = readdir(dir);
587 if (dent == NULL) return NULL;
588 if (strcmp(dent->d_name, ".") != 0 && strcmp(dent->d_name, "..") != 0)
589 return dent->d_name;
590 }
591 /* Control never reaches here */
592 }
593
594 static void
595 closedirectory(directory_type *dir)
596 {
597 closedir(dir);
598 }
599
600
601 /************* Test for regular file, Unix-style **********/
602
603 static int
604 isregfile(char *filename)
605 {
606 struct stat statbuf;
607 if (stat(filename, &statbuf) < 0)
608 return 1; /* In the expectation that opening as a file will fail */
609 return (statbuf.st_mode & S_IFMT) == S_IFREG;
610 }
611
612
613 #if defined NATIVE_ZOS
614 /************* Test for a terminal in z/OS **********/
615 /* isatty() does not work in a TSO environment, so always give FALSE.*/
616
617 static BOOL
618 is_stdout_tty(void)
619 {
620 return FALSE;
621 }
622
623 static BOOL
624 is_file_tty(FILE *f)
625 {
626 return FALSE;
627 }
628
629
630 /************* Test for a terminal, Unix-style **********/
631
632 #else
633 static BOOL
634 is_stdout_tty(void)
635 {
636 return isatty(fileno(stdout));
637 }
638
639 static BOOL
640 is_file_tty(FILE *f)
641 {
642 return isatty(fileno(f));
643 }
644 #endif
645
646 /* End of Unix-style or native z/OS environment functions. */
647
648
649 /************* Directory scanning in Windows ***********/
650
651 /* I (Philip Hazel) have no means of testing this code. It was contributed by
652 Lionel Fourquaux. David Burgess added a patch to define INVALID_FILE_ATTRIBUTES
653 when it did not exist. David Byron added a patch that moved the #include of
654 <windows.h> to before the INVALID_FILE_ATTRIBUTES definition rather than after.
655 The double test below stops gcc 4.4.4 grumbling that HAVE_WINDOWS_H is
656 undefined when it is indeed undefined. */
657
658 #elif defined HAVE_WINDOWS_H && HAVE_WINDOWS_H
659
660 #ifndef STRICT
661 # define STRICT
662 #endif
663 #ifndef WIN32_LEAN_AND_MEAN
664 # define WIN32_LEAN_AND_MEAN
665 #endif
666
667 #include <windows.h>
668
669 #ifndef INVALID_FILE_ATTRIBUTES
670 #define INVALID_FILE_ATTRIBUTES 0xFFFFFFFF
671 #endif
672
673 typedef struct directory_type
674 {
675 HANDLE handle;
676 BOOL first;
677 WIN32_FIND_DATA data;
678 } directory_type;
679
680 #define FILESEP '/'
681
682 int
683 isdirectory(char *filename)
684 {
685 DWORD attr = GetFileAttributes(filename);
686 if (attr == INVALID_FILE_ATTRIBUTES)
687 return 0;
688 return (attr & FILE_ATTRIBUTE_DIRECTORY) != 0;
689 }
690
691 directory_type *
692 opendirectory(char *filename)
693 {
694 size_t len;
695 char *pattern;
696 directory_type *dir;
697 DWORD err;
698 len = strlen(filename);
699 pattern = (char *)malloc(len + 3);
700 dir = (directory_type *)malloc(sizeof(*dir));
701 if ((pattern == NULL) || (dir == NULL))
702 {
703 fprintf(stderr, "pcregrep: malloc failed\n");
704 pcregrep_exit(2);
705 }
706 memcpy(pattern, filename, len);
707 memcpy(&(pattern[len]), "\\*", 3);
708 dir->handle = FindFirstFile(pattern, &(dir->data));
709 if (dir->handle != INVALID_HANDLE_VALUE)
710 {
711 free(pattern);
712 dir->first = TRUE;
713 return dir;
714 }
715 err = GetLastError();
716 free(pattern);
717 free(dir);
718 errno = (err == ERROR_ACCESS_DENIED) ? EACCES : ENOENT;
719 return NULL;
720 }
721
722 char *
723 readdirectory(directory_type *dir)
724 {
725 for (;;)
726 {
727 if (!dir->first)
728 {
729 if (!FindNextFile(dir->handle, &(dir->data)))
730 return NULL;
731 }
732 else
733 {
734 dir->first = FALSE;
735 }
736 if (strcmp(dir->data.cFileName, ".") != 0 && strcmp(dir->data.cFileName, "..") != 0)
737 return dir->data.cFileName;
738 }
739 #ifndef _MSC_VER
740 return NULL; /* Keep compiler happy; never executed */
741 #endif
742 }
743
744 void
745 closedirectory(directory_type *dir)
746 {
747 FindClose(dir->handle);
748 free(dir);
749 }
750
751
752 /************* Test for regular file in Windows **********/
753
754 /* I don't know how to do this, or if it can be done; assume all paths are
755 regular if they are not directories. */
756
757 int isregfile(char *filename)
758 {
759 return !isdirectory(filename);
760 }
761
762
763 /************* Test for a terminal in Windows **********/
764
765 /* I don't know how to do this; assume never */
766
767 static BOOL
768 is_stdout_tty(void)
769 {
770 return FALSE;
771 }
772
773 static BOOL
774 is_file_tty(FILE *f)
775 {
776 return FALSE;
777 }
778
779 /* End of Windows functions */
780
781
782 /************* Directory scanning when we can't do it ***********/
783
784 /* The type is void, and apart from isdirectory(), the functions do nothing. */
785
786 #else
787
788 #define FILESEP 0
789 typedef void directory_type;
790
791 int isdirectory(char *filename) { return 0; }
792 directory_type * opendirectory(char *filename) { return (directory_type*)0;}
793 char *readdirectory(directory_type *dir) { return (char*)0;}
794 void closedirectory(directory_type *dir) {}
795
796
797 /************* Test for regular file when we can't do it **********/
798
799 /* Assume all files are regular. */
800
801 int isregfile(char *filename) { return 1; }
802
803
804 /************* Test for a terminal when we can't do it **********/
805
806 static BOOL
807 is_stdout_tty(void)
808 {
809 return FALSE;
810 }
811
812 static BOOL
813 is_file_tty(FILE *f)
814 {
815 return FALSE;
816 }
817
818 #endif /* End of system-specific functions */
819
820
821
822 #ifndef HAVE_STRERROR
823 /*************************************************
824 * Provide strerror() for non-ANSI libraries *
825 *************************************************/
826
827 /* Some old-fashioned systems still around (e.g. SunOS4) don't have strerror()
828 in their libraries, but can provide the same facility by this simple
829 alternative function. */
830
831 extern int sys_nerr;
832 extern char *sys_errlist[];
833
834 char *
835 strerror(int n)
836 {
837 if (n < 0 || n >= sys_nerr) return "unknown error number";
838 return sys_errlist[n];
839 }
840 #endif /* HAVE_STRERROR */
841
842
843
844 /*************************************************
845 * Usage function *
846 *************************************************/
847
848 static int
849 usage(int rc)
850 {
851 option_item *op;
852 fprintf(stderr, "Usage: pcregrep [-");
853 for (op = optionlist; op->one_char != 0; op++)
854 {
855 if (op->one_char > 0) fprintf(stderr, "%c", op->one_char);
856 }
857 fprintf(stderr, "] [long options] [pattern] [files]\n");
858 fprintf(stderr, "Type `pcregrep --help' for more information and the long "
859 "options.\n");
860 return rc;
861 }
862
863
864
865 /*************************************************
866 * Help function *
867 *************************************************/
868
869 static void
870 help(void)
871 {
872 option_item *op;
873
874 printf("Usage: pcregrep [OPTION]... [PATTERN] [FILE1 FILE2 ...]\n");
875 printf("Search for PATTERN in each FILE or standard input.\n");
876 printf("PATTERN must be present if neither -e nor -f is used.\n");
877 printf("\"-\" can be used as a file name to mean STDIN.\n");
878
879 #ifdef SUPPORT_LIBZ
880 printf("Files whose names end in .gz are read using zlib.\n");
881 #endif
882
883 #ifdef SUPPORT_LIBBZ2
884 printf("Files whose names end in .bz2 are read using bzlib2.\n");
885 #endif
886
887 #if defined SUPPORT_LIBZ || defined SUPPORT_LIBBZ2
888 printf("Other files and the standard input are read as plain files.\n\n");
889 #else
890 printf("All files are read as plain files, without any interpretation.\n\n");
891 #endif
892
893 printf("Example: pcregrep -i 'hello.*world' menu.h main.c\n\n");
894 printf("Options:\n");
895
896 for (op = optionlist; op->one_char != 0; op++)
897 {
898 int n;
899 char s[4];
900
901 /* Two options were accidentally implemented and documented with underscores
902 instead of hyphens in their names, something that was not noticed for quite a
903 few releases. When fixing this, I left the underscored versions in the list
904 in case people were using them. However, we don't want to display them in the
905 help data. There are no other options that contain underscores, and we do not
906 expect ever to implement such options. Therefore, just omit any option that
907 contains an underscore. */
908
909 if (strchr(op->long_name, '_') != NULL) continue;
910
911 if (op->one_char > 0 && (op->long_name)[0] == 0)
912 n = 31 - printf(" -%c", op->one_char);
913 else
914 {
915 if (op->one_char > 0) sprintf(s, "-%c,", op->one_char);
916 else strcpy(s, " ");
917 n = 31 - printf(" %s --%s", s, op->long_name);
918 }
919
920 if (n < 1) n = 1;
921 printf("%.*s%s\n", n, " ", op->help_text);
922 }
923
924 printf("\nNumbers may be followed by K or M, e.g. --buffer-size=100K.\n");
925 printf("The default value for --buffer-size is %d.\n", PCREGREP_BUFSIZE);
926 printf("When reading patterns or file names from a file, trailing white\n");
927 printf("space is removed and blank lines are ignored.\n");
928 printf("The maximum size of any pattern is %d bytes.\n", MAXPATLEN);
929
930 printf("\nWith no FILEs, read standard input. If fewer than two FILEs given, assume -h.\n");
931 printf("Exit status is 0 if any matches, 1 if no matches, and 2 if trouble.\n");
932 }
933
934
935
936 /*************************************************
937 * Test exclude/includes *
938 *************************************************/
939
940 /* If any exclude pattern matches, the path is excluded. Otherwise, unless
941 there are no includes, the path must match an include pattern.
942
943 Arguments:
944 path the path to be matched
945 ip the chain of include patterns
946 ep the chain of exclude patterns
947
948 Returns: TRUE if the path is not excluded
949 */
950
951 static BOOL
952 test_incexc(char *path, patstr *ip, patstr *ep)
953 {
954 int plen = strlen(path);
955
956 for (; ep != NULL; ep = ep->next)
957 {
958 if (pcre_exec(ep->compiled, NULL, path, plen, 0, 0, NULL, 0) >= 0)
959 return FALSE;
960 }
961
962 if (ip == NULL) return TRUE;
963
964 for (; ip != NULL; ip = ip->next)
965 {
966 if (pcre_exec(ip->compiled, NULL, path, plen, 0, 0, NULL, 0) >= 0)
967 return TRUE;
968 }
969
970 return FALSE;
971 }
972
973
974
975 /*************************************************
976 * Decode integer argument value *
977 *************************************************/
978
979 /* Integer arguments can be followed by K or M. Avoid the use of strtoul()
980 because SunOS4 doesn't have it. This is used only for unpicking arguments, so
981 just keep it simple.
982
983 Arguments:
984 option_data the option data string
985 op the option item (for error messages)
986 longop TRUE if option given in long form
987
988 Returns: a long integer
989 */
990
991 static long int
992 decode_number(char *option_data, option_item *op, BOOL longop)
993 {
994 unsigned long int n = 0;
995 char *endptr = option_data;
996 while (*endptr != 0 && isspace((unsigned char)(*endptr))) endptr++;
997 while (isdigit((unsigned char)(*endptr)))
998 n = n * 10 + (int)(*endptr++ - '0');
999 if (toupper(*endptr) == 'K')
1000 {
1001 n *= 1024;
1002 endptr++;
1003 }
1004 else if (toupper(*endptr) == 'M')
1005 {
1006 n *= 1024*1024;
1007 endptr++;
1008 }
1009
1010 if (*endptr != 0) /* Error */
1011 {
1012 if (longop)
1013 {
1014 char *equals = strchr(op->long_name, '=');
1015 int nlen = (equals == NULL)? (int)strlen(op->long_name) :
1016 (int)(equals - op->long_name);
1017 fprintf(stderr, "pcregrep: Malformed number \"%s\" after --%.*s\n",
1018 option_data, nlen, op->long_name);
1019 }
1020 else
1021 fprintf(stderr, "pcregrep: Malformed number \"%s\" after -%c\n",
1022 option_data, op->one_char);
1023 pcregrep_exit(usage(2));
1024 }
1025
1026 return n;
1027 }
1028
1029
1030
1031 /*************************************************
1032 * Add item to a chain of numbers *
1033 *************************************************/
1034
1035 /* Used to add an item onto a chain, or just return an unconnected item if the
1036 "after" argument is NULL.
1037
1038 Arguments:
1039 n the number to add
1040 after if not NULL points to item to insert after
1041
1042 Returns: new number block
1043 */
1044
1045 static omstr *
1046 add_number(int n, omstr *after)
1047 {
1048 omstr *om = (omstr *)malloc(sizeof(omstr));
1049
1050 if (om == NULL)
1051 {
1052 fprintf(stderr, "pcregrep: malloc failed\n");
1053 pcregrep_exit(2);
1054 }
1055 om->next = NULL;
1056 om->groupnum = n;
1057
1058 if (after != NULL)
1059 {
1060 om->next = after->next;
1061 after->next = om;
1062 }
1063 return om;
1064 }
1065
1066
1067
1068 /*************************************************
1069 * Read one line of input *
1070 *************************************************/
1071
1072 /* Normally, input is read using fread() into a large buffer, so many lines may
1073 be read at once. However, doing this for tty input means that no output appears
1074 until a lot of input has been typed. Instead, tty input is handled line by
1075 line. We cannot use fgets() for this, because it does not stop at a binary
1076 zero, and therefore there is no way of telling how many characters it has read,
1077 because there may be binary zeros embedded in the data.
1078
1079 Arguments:
1080 buffer the buffer to read into
1081 length the maximum number of characters to read
1082 f the file
1083
1084 Returns: the number of characters read, zero at end of file
1085 */
1086
1087 static unsigned int
1088 read_one_line(char *buffer, int length, FILE *f)
1089 {
1090 int c;
1091 int yield = 0;
1092 while ((c = fgetc(f)) != EOF)
1093 {
1094 buffer[yield++] = c;
1095 if (c == '\n' || yield >= length) break;
1096 }
1097 return yield;
1098 }
1099
1100
1101
1102 /*************************************************
1103 * Find end of line *
1104 *************************************************/
1105
1106 /* The length of the endline sequence that is found is set via lenptr. This may
1107 be zero at the very end of the file if there is no line-ending sequence there.
1108
1109 Arguments:
1110 p current position in line
1111 endptr end of available data
1112 lenptr where to put the length of the eol sequence
1113
1114 Returns: pointer after the last byte of the line,
1115 including the newline byte(s)
1116 */
1117
1118 static char *
1119 end_of_line(char *p, char *endptr, int *lenptr)
1120 {
1121 switch(endlinetype)
1122 {
1123 default: /* Just in case */
1124 case EL_LF:
1125 while (p < endptr && *p != '\n') p++;
1126 if (p < endptr)
1127 {
1128 *lenptr = 1;
1129 return p + 1;
1130 }
1131 *lenptr = 0;
1132 return endptr;
1133
1134 case EL_CR:
1135 while (p < endptr && *p != '\r') p++;
1136 if (p < endptr)
1137 {
1138 *lenptr = 1;
1139 return p + 1;
1140 }
1141 *lenptr = 0;
1142 return endptr;
1143
1144 case EL_CRLF:
1145 for (;;)
1146 {
1147 while (p < endptr && *p != '\r') p++;
1148 if (++p >= endptr)
1149 {
1150 *lenptr = 0;
1151 return endptr;
1152 }
1153 if (*p == '\n')
1154 {
1155 *lenptr = 2;
1156 return p + 1;
1157 }
1158 }
1159 break;
1160
1161 case EL_ANYCRLF:
1162 while (p < endptr)
1163 {
1164 int extra = 0;
1165 register int c = *((unsigned char *)p);
1166
1167 if (utf8 && c >= 0xc0)
1168 {
1169 int gcii, gcss;
1170 extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */
1171 gcss = 6*extra;
1172 c = (c & utf8_table3[extra]) << gcss;
1173 for (gcii = 1; gcii <= extra; gcii++)
1174 {
1175 gcss -= 6;
1176 c |= (p[gcii] & 0x3f) << gcss;
1177 }
1178 }
1179
1180 p += 1 + extra;
1181
1182 switch (c)
1183 {
1184 case '\n':
1185 *lenptr = 1;
1186 return p;
1187
1188 case '\r':
1189 if (p < endptr && *p == '\n')
1190 {
1191 *lenptr = 2;
1192 p++;
1193 }
1194 else *lenptr = 1;
1195 return p;
1196
1197 default:
1198 break;
1199 }
1200 } /* End of loop for ANYCRLF case */
1201
1202 *lenptr = 0; /* Must have hit the end */
1203 return endptr;
1204
1205 case EL_ANY:
1206 while (p < endptr)
1207 {
1208 int extra = 0;
1209 register int c = *((unsigned char *)p);
1210
1211 if (utf8 && c >= 0xc0)
1212 {
1213 int gcii, gcss;
1214 extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */
1215 gcss = 6*extra;
1216 c = (c & utf8_table3[extra]) << gcss;
1217 for (gcii = 1; gcii <= extra; gcii++)
1218 {
1219 gcss -= 6;
1220 c |= (p[gcii] & 0x3f) << gcss;
1221 }
1222 }
1223
1224 p += 1 + extra;
1225
1226 switch (c)
1227 {
1228 case '\n': /* LF */
1229 case '\v': /* VT */
1230 case '\f': /* FF */
1231 *lenptr = 1;
1232 return p;
1233
1234 case '\r': /* CR */
1235 if (p < endptr && *p == '\n')
1236 {
1237 *lenptr = 2;
1238 p++;
1239 }
1240 else *lenptr = 1;
1241 return p;
1242
1243 #ifndef EBCDIC
1244 case 0x85: /* Unicode NEL */
1245 *lenptr = utf8? 2 : 1;
1246 return p;
1247
1248 case 0x2028: /* Unicode LS */
1249 case 0x2029: /* Unicode PS */
1250 *lenptr = 3;
1251 return p;
1252 #endif /* Not EBCDIC */
1253
1254 default:
1255 break;
1256 }
1257 } /* End of loop for ANY case */
1258
1259 *lenptr = 0; /* Must have hit the end */
1260 return endptr;
1261 } /* End of overall switch */
1262 }
1263
1264
1265
1266 /*************************************************
1267 * Find start of previous line *
1268 *************************************************/
1269
1270 /* This is called when looking back for before lines to print.
1271
1272 Arguments:
1273 p start of the subsequent line
1274 startptr start of available data
1275
1276 Returns: pointer to the start of the previous line
1277 */
1278
1279 static char *
1280 previous_line(char *p, char *startptr)
1281 {
1282 switch(endlinetype)
1283 {
1284 default: /* Just in case */
1285 case EL_LF:
1286 p--;
1287 while (p > startptr && p[-1] != '\n') p--;
1288 return p;
1289
1290 case EL_CR:
1291 p--;
1292 while (p > startptr && p[-1] != '\n') p--;
1293 return p;
1294
1295 case EL_CRLF:
1296 for (;;)
1297 {
1298 p -= 2;
1299 while (p > startptr && p[-1] != '\n') p--;
1300 if (p <= startptr + 1 || p[-2] == '\r') return p;
1301 }
1302 /* Control can never get here */
1303
1304 case EL_ANY:
1305 case EL_ANYCRLF:
1306 if (*(--p) == '\n' && p > startptr && p[-1] == '\r') p--;
1307 if (utf8) while ((*p & 0xc0) == 0x80) p--;
1308
1309 while (p > startptr)
1310 {
1311 register unsigned int c;
1312 char *pp = p - 1;
1313
1314 if (utf8)
1315 {
1316 int extra = 0;
1317 while ((*pp & 0xc0) == 0x80) pp--;
1318 c = *((unsigned char *)pp);
1319 if (c >= 0xc0)
1320 {
1321 int gcii, gcss;
1322 extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */
1323 gcss = 6*extra;
1324 c = (c & utf8_table3[extra]) << gcss;
1325 for (gcii = 1; gcii <= extra; gcii++)
1326 {
1327 gcss -= 6;
1328 c |= (pp[gcii] & 0x3f) << gcss;
1329 }
1330 }
1331 }
1332 else c = *((unsigned char *)pp);
1333
1334 if (endlinetype == EL_ANYCRLF) switch (c)
1335 {
1336 case '\n': /* LF */
1337 case '\r': /* CR */
1338 return p;
1339
1340 default:
1341 break;
1342 }
1343
1344 else switch (c)
1345 {
1346 case '\n': /* LF */
1347 case '\v': /* VT */
1348 case '\f': /* FF */
1349 case '\r': /* CR */
1350 #ifndef EBCDIE
1351 case 0x85: /* Unicode NEL */
1352 case 0x2028: /* Unicode LS */
1353 case 0x2029: /* Unicode PS */
1354 #endif /* Not EBCDIC */
1355 return p;
1356
1357 default:
1358 break;
1359 }
1360
1361 p = pp; /* Back one character */
1362 } /* End of loop for ANY case */
1363
1364 return startptr; /* Hit start of data */
1365 } /* End of overall switch */
1366 }
1367
1368
1369
1370
1371
1372 /*************************************************
1373 * Print the previous "after" lines *
1374 *************************************************/
1375
1376 /* This is called if we are about to lose said lines because of buffer filling,
1377 and at the end of the file. The data in the line is written using fwrite() so
1378 that a binary zero does not terminate it.
1379
1380 Arguments:
1381 lastmatchnumber the number of the last matching line, plus one
1382 lastmatchrestart where we restarted after the last match
1383 endptr end of available data
1384 printname filename for printing
1385
1386 Returns: nothing
1387 */
1388
1389 static void
1390 do_after_lines(int lastmatchnumber, char *lastmatchrestart, char *endptr,
1391 char *printname)
1392 {
1393 if (after_context > 0 && lastmatchnumber > 0)
1394 {
1395 int count = 0;
1396 while (lastmatchrestart < endptr && count++ < after_context)
1397 {
1398 int ellength;
1399 char *pp = lastmatchrestart;
1400 if (printname != NULL) fprintf(stdout, "%s-", printname);
1401 if (number) fprintf(stdout, "%d-", lastmatchnumber++);
1402 pp = end_of_line(pp, endptr, &ellength);
1403 FWRITE(lastmatchrestart, 1, pp - lastmatchrestart, stdout);
1404 lastmatchrestart = pp;
1405 }
1406 hyphenpending = TRUE;
1407 }
1408 }
1409
1410
1411
1412 /*************************************************
1413 * Apply patterns to subject till one matches *
1414 *************************************************/
1415
1416 /* This function is called to run through all patterns, looking for a match. It
1417 is used multiple times for the same subject when colouring is enabled, in order
1418 to find all possible matches.
1419
1420 Arguments:
1421 matchptr the start of the subject
1422 length the length of the subject to match
1423 options options for pcre_exec
1424 startoffset where to start matching
1425 offsets the offets vector to fill in
1426 mrc address of where to put the result of pcre_exec()
1427
1428 Returns: TRUE if there was a match
1429 FALSE if there was no match
1430 invert if there was a non-fatal error
1431 */
1432
1433 static BOOL
1434 match_patterns(char *matchptr, size_t length, unsigned int options,
1435 int startoffset, int *offsets, int *mrc)
1436 {
1437 int i;
1438 size_t slen = length;
1439 patstr *p = patterns;
1440 const char *msg = "this text:\n\n";
1441
1442 if (slen > 200)
1443 {
1444 slen = 200;
1445 msg = "text that starts:\n\n";
1446 }
1447 for (i = 1; p != NULL; p = p->next, i++)
1448 {
1449 *mrc = pcre_exec(p->compiled, p->hint, matchptr, (int)length,
1450 startoffset, options, offsets, OFFSET_SIZE);
1451 if (*mrc >= 0) return TRUE;
1452 if (*mrc == PCRE_ERROR_NOMATCH) continue;
1453 fprintf(stderr, "pcregrep: pcre_exec() gave error %d while matching ", *mrc);
1454 if (patterns->next != NULL) fprintf(stderr, "pattern number %d to ", i);
1455 fprintf(stderr, "%s", msg);
1456 FWRITE(matchptr, 1, slen, stderr); /* In case binary zero included */
1457 fprintf(stderr, "\n\n");
1458 if (*mrc == PCRE_ERROR_MATCHLIMIT || *mrc == PCRE_ERROR_RECURSIONLIMIT ||
1459 *mrc == PCRE_ERROR_JIT_STACKLIMIT)
1460 resource_error = TRUE;
1461 if (error_count++ > 20)
1462 {
1463 fprintf(stderr, "pcregrep: Too many errors - abandoned.\n");
1464 pcregrep_exit(2);
1465 }
1466 return invert; /* No more matching; don't show the line again */
1467 }
1468
1469 return FALSE; /* No match, no errors */
1470 }
1471
1472
1473
1474 /*************************************************
1475 * Grep an individual file *
1476 *************************************************/
1477
1478 /* This is called from grep_or_recurse() below. It uses a buffer that is three
1479 times the value of bufthird. The matching point is never allowed to stray into
1480 the top third of the buffer, thus keeping more of the file available for
1481 context printing or for multiline scanning. For large files, the pointer will
1482 be in the middle third most of the time, so the bottom third is available for
1483 "before" context printing.
1484
1485 Arguments:
1486 handle the fopened FILE stream for a normal file
1487 the gzFile pointer when reading is via libz
1488 the BZFILE pointer when reading is via libbz2
1489 frtype FR_PLAIN, FR_LIBZ, or FR_LIBBZ2
1490 filename the file name or NULL (for errors)
1491 printname the file name if it is to be printed for each match
1492 or NULL if the file name is not to be printed
1493 it cannot be NULL if filenames[_nomatch]_only is set
1494
1495 Returns: 0 if there was at least one match
1496 1 otherwise (no matches)
1497 2 if an overlong line is encountered
1498 3 if there is a read error on a .bz2 file
1499 */
1500
1501 static int
1502 pcregrep(void *handle, int frtype, char *filename, char *printname)
1503 {
1504 int rc = 1;
1505 int linenumber = 1;
1506 int lastmatchnumber = 0;
1507 int count = 0;
1508 int filepos = 0;
1509 int offsets[OFFSET_SIZE];
1510 char *lastmatchrestart = NULL;
1511 char *ptr = main_buffer;
1512 char *endptr;
1513 size_t bufflength;
1514 BOOL binary = FALSE;
1515 BOOL endhyphenpending = FALSE;
1516 BOOL input_line_buffered = line_buffered;
1517 FILE *in = NULL; /* Ensure initialized */
1518
1519 #ifdef SUPPORT_LIBZ
1520 gzFile ingz = NULL;
1521 #endif
1522
1523 #ifdef SUPPORT_LIBBZ2
1524 BZFILE *inbz2 = NULL;
1525 #endif
1526
1527
1528 /* Do the first read into the start of the buffer and set up the pointer to end
1529 of what we have. In the case of libz, a non-zipped .gz file will be read as a
1530 plain file. However, if a .bz2 file isn't actually bzipped, the first read will
1531 fail. */
1532
1533 (void)frtype;
1534
1535 #ifdef SUPPORT_LIBZ
1536 if (frtype == FR_LIBZ)
1537 {
1538 ingz = (gzFile)handle;
1539 bufflength = gzread (ingz, main_buffer, bufsize);
1540 }
1541 else
1542 #endif
1543
1544 #ifdef SUPPORT_LIBBZ2
1545 if (frtype == FR_LIBBZ2)
1546 {
1547 inbz2 = (BZFILE *)handle;
1548 bufflength = BZ2_bzread(inbz2, main_buffer, bufsize);
1549 if ((int)bufflength < 0) return 2; /* Gotcha: bufflength is size_t; */
1550 } /* without the cast it is unsigned. */
1551 else
1552 #endif
1553
1554 {
1555 in = (FILE *)handle;
1556 if (is_file_tty(in)) input_line_buffered = TRUE;
1557 bufflength = input_line_buffered?
1558 read_one_line(main_buffer, bufsize, in) :
1559 fread(main_buffer, 1, bufsize, in);
1560 }
1561
1562 endptr = main_buffer + bufflength;
1563
1564 /* Unless binary-files=text, see if we have a binary file. This uses the same
1565 rule as GNU grep, namely, a search for a binary zero byte near the start of the
1566 file. */
1567
1568 if (binary_files != BIN_TEXT)
1569 {
1570 binary =
1571 memchr(main_buffer, 0, (bufflength > 1024)? 1024 : bufflength) != NULL;
1572 if (binary && binary_files == BIN_NOMATCH) return 1;
1573 }
1574
1575 /* Loop while the current pointer is not at the end of the file. For large
1576 files, endptr will be at the end of the buffer when we are in the middle of the
1577 file, but ptr will never get there, because as soon as it gets over 2/3 of the
1578 way, the buffer is shifted left and re-filled. */
1579
1580 while (ptr < endptr)
1581 {
1582 int endlinelength;
1583 int mrc = 0;
1584 int startoffset = 0;
1585 unsigned int options = 0;
1586 BOOL match;
1587 char *matchptr = ptr;
1588 char *t = ptr;
1589 size_t length, linelength;
1590
1591 /* At this point, ptr is at the start of a line. We need to find the length
1592 of the subject string to pass to pcre_exec(). In multiline mode, it is the
1593 length remainder of the data in the buffer. Otherwise, it is the length of
1594 the next line, excluding the terminating newline. After matching, we always
1595 advance by the length of the next line. In multiline mode the PCRE_FIRSTLINE
1596 option is used for compiling, so that any match is constrained to be in the
1597 first line. */
1598
1599 t = end_of_line(t, endptr, &endlinelength);
1600 linelength = t - ptr - endlinelength;
1601 length = multiline? (size_t)(endptr - ptr) : linelength;
1602
1603 /* Check to see if the line we are looking at extends right to the very end
1604 of the buffer without a line terminator. This means the line is too long to
1605 handle. */
1606
1607 if (endlinelength == 0 && t == main_buffer + bufsize)
1608 {
1609 fprintf(stderr, "pcregrep: line %d%s%s is too long for the internal buffer\n"
1610 "pcregrep: check the --buffer-size option\n",
1611 linenumber,
1612 (filename == NULL)? "" : " of file ",
1613 (filename == NULL)? "" : filename);
1614 return 2;
1615 }
1616
1617 /* Extra processing for Jeffrey Friedl's debugging. */
1618
1619 #ifdef JFRIEDL_DEBUG
1620 if (jfriedl_XT || jfriedl_XR)
1621 {
1622 # include <sys/time.h>
1623 # include <time.h>
1624 struct timeval start_time, end_time;
1625 struct timezone dummy;
1626 int i;
1627
1628 if (jfriedl_XT)
1629 {
1630 unsigned long newlen = length * jfriedl_XT + strlen(jfriedl_prefix) + strlen(jfriedl_postfix);
1631 const char *orig = ptr;
1632 ptr = malloc(newlen + 1);
1633 if (!ptr) {
1634 printf("out of memory");
1635 pcregrep_exit(2);
1636 }
1637 endptr = ptr;
1638 strcpy(endptr, jfriedl_prefix); endptr += strlen(jfriedl_prefix);
1639 for (i = 0; i < jfriedl_XT; i++) {
1640 strncpy(endptr, orig, length);
1641 endptr += length;
1642 }
1643 strcpy(endptr, jfriedl_postfix); endptr += strlen(jfriedl_postfix);
1644 length = newlen;
1645 }
1646
1647 if (gettimeofday(&start_time, &dummy) != 0)
1648 perror("bad gettimeofday");
1649
1650
1651 for (i = 0; i < jfriedl_XR; i++)
1652 match = (pcre_exec(patterns->compiled, patterns->hint, ptr, length, 0,
1653 PCRE_NOTEMPTY, offsets, OFFSET_SIZE) >= 0);
1654
1655 if (gettimeofday(&end_time, &dummy) != 0)
1656 perror("bad gettimeofday");
1657
1658 double delta = ((end_time.tv_sec + (end_time.tv_usec / 1000000.0))
1659 -
1660 (start_time.tv_sec + (start_time.tv_usec / 1000000.0)));
1661
1662 printf("%s TIMER[%.4f]\n", match ? "MATCH" : "FAIL", delta);
1663 return 0;
1664 }
1665 #endif
1666
1667 /* We come back here after a match when show_only_matching is set, in order
1668 to find any further matches in the same line. This applies to
1669 --only-matching, --file-offsets, and --line-offsets. */
1670
1671 ONLY_MATCHING_RESTART:
1672
1673 /* Run through all the patterns until one matches or there is an error other
1674 than NOMATCH. This code is in a subroutine so that it can be re-used for
1675 finding subsequent matches when colouring matched lines. After finding one
1676 match, set PCRE_NOTEMPTY to disable any further matches of null strings in
1677 this line. */
1678
1679 match = match_patterns(matchptr, length, options, startoffset, offsets, &mrc);
1680 options = PCRE_NOTEMPTY;
1681
1682 /* If it's a match or a not-match (as required), do what's wanted. */
1683
1684 if (match != invert)
1685 {
1686 BOOL hyphenprinted = FALSE;
1687
1688 /* We've failed if we want a file that doesn't have any matches. */
1689
1690 if (filenames == FN_NOMATCH_ONLY) return 1;
1691
1692 /* Just count if just counting is wanted. */
1693
1694 if (count_only) count++;
1695
1696 /* When handling a binary file and binary-files==binary, the "binary"
1697 variable will be set true (it's false in all other cases). In this
1698 situation we just want to output the file name. No need to scan further. */
1699
1700 else if (binary)
1701 {
1702 fprintf(stdout, "Binary file %s matches\n", filename);
1703 return 0;
1704 }
1705
1706 /* If all we want is a file name, there is no need to scan any more lines
1707 in the file. */
1708
1709 else if (filenames == FN_MATCH_ONLY)
1710 {
1711 fprintf(stdout, "%s\n", printname);
1712 return 0;
1713 }
1714
1715 /* Likewise, if all we want is a yes/no answer. */
1716
1717 else if (quiet) return 0;
1718
1719 /* The --only-matching option prints just the substring that matched,
1720 and/or one or more captured portions of it, as long as these strings are
1721 not empty. The --file-offsets and --line-offsets options output offsets for
1722 the matching substring (all three set show_only_matching). None of these
1723 mutually exclusive options prints any context. Afterwards, adjust the start
1724 and then jump back to look for further matches in the same line. If we are
1725 in invert mode, however, nothing is printed and we do not restart - this
1726 could still be useful because the return code is set. */
1727
1728 else if (show_only_matching)
1729 {
1730 if (!invert)
1731 {
1732 if (printname != NULL) fprintf(stdout, "%s:", printname);
1733 if (number) fprintf(stdout, "%d:", linenumber);
1734
1735 /* Handle --line-offsets */
1736
1737 if (line_offsets)
1738 fprintf(stdout, "%d,%d\n", (int)(matchptr + offsets[0] - ptr),
1739 offsets[1] - offsets[0]);
1740
1741 /* Handle --file-offsets */
1742
1743 else if (file_offsets)
1744 fprintf(stdout, "%d,%d\n",
1745 (int)(filepos + matchptr + offsets[0] - ptr),
1746 offsets[1] - offsets[0]);
1747
1748 /* Handle --only-matching, which may occur many times */
1749
1750 else
1751 {
1752 BOOL printed = FALSE;
1753 omstr *om;
1754
1755 for (om = only_matching; om != NULL; om = om->next)
1756 {
1757 int n = om->groupnum;
1758 if (n < mrc)
1759 {
1760 int plen = offsets[2*n + 1] - offsets[2*n];
1761 if (plen > 0)
1762 {
1763 if (printed) fprintf(stdout, "%s", om_separator);
1764 if (do_colour) fprintf(stdout, "%c[%sm", 0x1b, colour_string);
1765 FWRITE(matchptr + offsets[n*2], 1, plen, stdout);
1766 if (do_colour) fprintf(stdout, "%c[00m", 0x1b);
1767 printed = TRUE;
1768 }
1769 }
1770 }
1771
1772 if (printed || printname != NULL || number) fprintf(stdout, "\n");
1773 }
1774
1775 /* Prepare to repeat to find the next match */
1776
1777 match = FALSE;
1778 if (line_buffered) fflush(stdout);
1779 rc = 0; /* Had some success */
1780 startoffset = offsets[1]; /* Restart after the match */
1781 goto ONLY_MATCHING_RESTART;
1782 }
1783 }
1784
1785 /* This is the default case when none of the above options is set. We print
1786 the matching lines(s), possibly preceded and/or followed by other lines of
1787 context. */
1788
1789 else
1790 {
1791 /* See if there is a requirement to print some "after" lines from a
1792 previous match. We never print any overlaps. */
1793
1794 if (after_context > 0 && lastmatchnumber > 0)
1795 {
1796 int ellength;
1797 int linecount = 0;
1798 char *p = lastmatchrestart;
1799
1800 while (p < ptr && linecount < after_context)
1801 {
1802 p = end_of_line(p, ptr, &ellength);
1803 linecount++;
1804 }
1805
1806 /* It is important to advance lastmatchrestart during this printing so
1807 that it interacts correctly with any "before" printing below. Print
1808 each line's data using fwrite() in case there are binary zeroes. */
1809
1810 while (lastmatchrestart < p)
1811 {
1812 char *pp = lastmatchrestart;
1813 if (printname != NULL) fprintf(stdout, "%s-", printname);
1814 if (number) fprintf(stdout, "%d-", lastmatchnumber++);
1815 pp = end_of_line(pp, endptr, &ellength);
1816 FWRITE(lastmatchrestart, 1, pp - lastmatchrestart, stdout);
1817 lastmatchrestart = pp;
1818 }
1819 if (lastmatchrestart != ptr) hyphenpending = TRUE;
1820 }
1821
1822 /* If there were non-contiguous lines printed above, insert hyphens. */
1823
1824 if (hyphenpending)
1825 {
1826 fprintf(stdout, "--\n");
1827 hyphenpending = FALSE;
1828 hyphenprinted = TRUE;
1829 }
1830
1831 /* See if there is a requirement to print some "before" lines for this
1832 match. Again, don't print overlaps. */
1833
1834 if (before_context > 0)
1835 {
1836 int linecount = 0;
1837 char *p = ptr;
1838
1839 while (p > main_buffer && (lastmatchnumber == 0 || p > lastmatchrestart) &&
1840 linecount < before_context)
1841 {
1842 linecount++;
1843 p = previous_line(p, main_buffer);
1844 }
1845
1846 if (lastmatchnumber > 0 && p > lastmatchrestart && !hyphenprinted)
1847 fprintf(stdout, "--\n");
1848
1849 while (p < ptr)
1850 {
1851 int ellength;
1852 char *pp = p;
1853 if (printname != NULL) fprintf(stdout, "%s-", printname);
1854 if (number) fprintf(stdout, "%d-", linenumber - linecount--);
1855 pp = end_of_line(pp, endptr, &ellength);
1856 FWRITE(p, 1, pp - p, stdout);
1857 p = pp;
1858 }
1859 }
1860
1861 /* Now print the matching line(s); ensure we set hyphenpending at the end
1862 of the file if any context lines are being output. */
1863
1864 if (after_context > 0 || before_context > 0)
1865 endhyphenpending = TRUE;
1866
1867 if (printname != NULL) fprintf(stdout, "%s:", printname);
1868 if (number) fprintf(stdout, "%d:", linenumber);
1869
1870 /* In multiline mode, we want to print to the end of the line in which
1871 the end of the matched string is found, so we adjust linelength and the
1872 line number appropriately, but only when there actually was a match
1873 (invert not set). Because the PCRE_FIRSTLINE option is set, the start of
1874 the match will always be before the first newline sequence. */
1875
1876 if (multiline & !invert)
1877 {
1878 char *endmatch = ptr + offsets[1];
1879 t = ptr;
1880 while (t <= endmatch)
1881 {
1882 t = end_of_line(t, endptr, &endlinelength);
1883 if (t < endmatch) linenumber++; else break;
1884 }
1885 linelength = t - ptr - endlinelength;
1886 }
1887
1888 /*** NOTE: Use only fwrite() to output the data line, so that binary
1889 zeroes are treated as just another data character. */
1890
1891 /* This extra option, for Jeffrey Friedl's debugging requirements,
1892 replaces the matched string, or a specific captured string if it exists,
1893 with X. When this happens, colouring is ignored. */
1894
1895 #ifdef JFRIEDL_DEBUG
1896 if (S_arg >= 0 && S_arg < mrc)
1897 {
1898 int first = S_arg * 2;
1899 int last = first + 1;
1900 FWRITE(ptr, 1, offsets[first], stdout);
1901 fprintf(stdout, "X");
1902 FWRITE(ptr + offsets[last], 1, linelength - offsets[last], stdout);
1903 }
1904 else
1905 #endif
1906
1907 /* We have to split the line(s) up if colouring, and search for further
1908 matches, but not of course if the line is a non-match. */
1909
1910 if (do_colour && !invert)
1911 {
1912 int plength;
1913 FWRITE(ptr, 1, offsets[0], stdout);
1914 fprintf(stdout, "%c[%sm", 0x1b, colour_string);
1915 FWRITE(ptr + offsets[0], 1, offsets[1] - offsets[0], stdout);
1916 fprintf(stdout, "%c[00m", 0x1b);
1917 for (;;)
1918 {
1919 startoffset = offsets[1];
1920 if (startoffset >= (int)linelength + endlinelength ||
1921 !match_patterns(matchptr, length, options, startoffset, offsets,
1922 &mrc))
1923 break;
1924 FWRITE(matchptr + startoffset, 1, offsets[0] - startoffset, stdout);
1925 fprintf(stdout, "%c[%sm", 0x1b, colour_string);
1926 FWRITE(matchptr + offsets[0], 1, offsets[1] - offsets[0], stdout);
1927 fprintf(stdout, "%c[00m", 0x1b);
1928 }
1929
1930 /* In multiline mode, we may have already printed the complete line
1931 and its line-ending characters (if they matched the pattern), so there
1932 may be no more to print. */
1933
1934 plength = (int)((linelength + endlinelength) - startoffset);
1935 if (plength > 0) FWRITE(ptr + startoffset, 1, plength, stdout);
1936 }
1937
1938 /* Not colouring; no need to search for further matches */
1939
1940 else FWRITE(ptr, 1, linelength + endlinelength, stdout);
1941 }
1942
1943 /* End of doing what has to be done for a match. If --line-buffered was
1944 given, flush the output. */
1945
1946 if (line_buffered) fflush(stdout);
1947 rc = 0; /* Had some success */
1948
1949 /* Remember where the last match happened for after_context. We remember
1950 where we are about to restart, and that line's number. */
1951
1952 lastmatchrestart = ptr + linelength + endlinelength;
1953 lastmatchnumber = linenumber + 1;
1954 }
1955
1956 /* For a match in multiline inverted mode (which of course did not cause
1957 anything to be printed), we have to move on to the end of the match before
1958 proceeding. */
1959
1960 if (multiline && invert && match)
1961 {
1962 int ellength;
1963 char *endmatch = ptr + offsets[1];
1964 t = ptr;
1965 while (t < endmatch)
1966 {
1967 t = end_of_line(t, endptr, &ellength);
1968 if (t <= endmatch) linenumber++; else break;
1969 }
1970 endmatch = end_of_line(endmatch, endptr, &ellength);
1971 linelength = endmatch - ptr - ellength;
1972 }
1973
1974 /* Advance to after the newline and increment the line number. The file
1975 offset to the current line is maintained in filepos. */
1976
1977 ptr += linelength + endlinelength;
1978 filepos += (int)(linelength + endlinelength);
1979 linenumber++;
1980
1981 /* If input is line buffered, and the buffer is not yet full, read another
1982 line and add it into the buffer. */
1983
1984 if (input_line_buffered && bufflength < (size_t)bufsize)
1985 {
1986 int add = read_one_line(ptr, bufsize - (int)(ptr - main_buffer), in);
1987 bufflength += add;
1988 endptr += add;
1989 }
1990
1991 /* If we haven't yet reached the end of the file (the buffer is full), and
1992 the current point is in the top 1/3 of the buffer, slide the buffer down by
1993 1/3 and refill it. Before we do this, if some unprinted "after" lines are
1994 about to be lost, print them. */
1995
1996 if (bufflength >= (size_t)bufsize && ptr > main_buffer + 2*bufthird)
1997 {
1998 if (after_context > 0 &&
1999 lastmatchnumber > 0 &&
2000 lastmatchrestart < main_buffer + bufthird)
2001 {
2002 do_after_lines(lastmatchnumber, lastmatchrestart, endptr, printname);
2003 lastmatchnumber = 0;
2004 }
2005
2006 /* Now do the shuffle */
2007
2008 memmove(main_buffer, main_buffer + bufthird, 2*bufthird);
2009 ptr -= bufthird;
2010
2011 #ifdef SUPPORT_LIBZ
2012 if (frtype == FR_LIBZ)
2013 bufflength = 2*bufthird +
2014 gzread (ingz, main_buffer + 2*bufthird, bufthird);
2015 else
2016 #endif
2017
2018 #ifdef SUPPORT_LIBBZ2
2019 if (frtype == FR_LIBBZ2)
2020 bufflength = 2*bufthird +
2021 BZ2_bzread(inbz2, main_buffer + 2*bufthird, bufthird);
2022 else
2023 #endif
2024
2025 bufflength = 2*bufthird +
2026 (input_line_buffered?
2027 read_one_line(main_buffer + 2*bufthird, bufthird, in) :
2028 fread(main_buffer + 2*bufthird, 1, bufthird, in));
2029 endptr = main_buffer + bufflength;
2030
2031 /* Adjust any last match point */
2032
2033 if (lastmatchnumber > 0) lastmatchrestart -= bufthird;
2034 }
2035 } /* Loop through the whole file */
2036
2037 /* End of file; print final "after" lines if wanted; do_after_lines sets
2038 hyphenpending if it prints something. */
2039
2040 if (!show_only_matching && !count_only)
2041 {
2042 do_after_lines(lastmatchnumber, lastmatchrestart, endptr, printname);
2043 hyphenpending |= endhyphenpending;
2044 }
2045
2046 /* Print the file name if we are looking for those without matches and there
2047 were none. If we found a match, we won't have got this far. */
2048
2049 if (filenames == FN_NOMATCH_ONLY)
2050 {
2051 fprintf(stdout, "%s\n", printname);
2052 return 0;
2053 }
2054
2055 /* Print the match count if wanted */
2056
2057 if (count_only)
2058 {
2059 if (count > 0 || !omit_zero_count)
2060 {
2061 if (printname != NULL && filenames != FN_NONE)
2062 fprintf(stdout, "%s:", printname);
2063 fprintf(stdout, "%d\n", count);
2064 }
2065 }
2066
2067 return rc;
2068 }
2069
2070
2071
2072 /*************************************************
2073 * Grep a file or recurse into a directory *
2074 *************************************************/
2075
2076 /* Given a path name, if it's a directory, scan all the files if we are
2077 recursing; if it's a file, grep it.
2078
2079 Arguments:
2080 pathname the path to investigate
2081 dir_recurse TRUE if recursing is wanted (-r or -drecurse)
2082 only_one_at_top TRUE if the path is the only one at toplevel
2083
2084 Returns: -1 the file/directory was skipped
2085 0 if there was at least one match
2086 1 if there were no matches
2087 2 there was some kind of error
2088
2089 However, file opening failures are suppressed if "silent" is set.
2090 */
2091
2092 static int
2093 grep_or_recurse(char *pathname, BOOL dir_recurse, BOOL only_one_at_top)
2094 {
2095 int rc = 1;
2096 int frtype;
2097 void *handle;
2098 char *lastcomp;
2099 FILE *in = NULL; /* Ensure initialized */
2100
2101 #ifdef SUPPORT_LIBZ
2102 gzFile ingz = NULL;
2103 #endif
2104
2105 #ifdef SUPPORT_LIBBZ2
2106 BZFILE *inbz2 = NULL;
2107 #endif
2108
2109 #if defined SUPPORT_LIBZ || defined SUPPORT_LIBBZ2
2110 int pathlen;
2111 #endif
2112
2113 #if defined NATIVE_ZOS
2114 int zos_type;
2115 FILE *zos_test_file;
2116 #endif
2117
2118 /* If the file name is "-" we scan stdin */
2119
2120 if (strcmp(pathname, "-") == 0)
2121 {
2122 return pcregrep(stdin, FR_PLAIN, stdin_name,
2123 (filenames > FN_DEFAULT || (filenames == FN_DEFAULT && !only_one_at_top))?
2124 stdin_name : NULL);
2125 }
2126
2127 /* Inclusion and exclusion: --include-dir and --exclude-dir apply only to
2128 directories, whereas --include and --exclude apply to everything else. The test
2129 is against the final component of the path. */
2130
2131 lastcomp = strrchr(pathname, FILESEP);
2132 lastcomp = (lastcomp == NULL)? pathname : lastcomp + 1;
2133
2134 /* If the file is a directory, skip if not recursing or if explicitly excluded.
2135 Otherwise, scan the directory and recurse for each path within it. The scanning
2136 code is localized so it can be made system-specific. */
2137
2138
2139 /* For z/OS, determine the file type. */
2140
2141 #if defined NATIVE_ZOS
2142 zos_test_file = fopen(pathname,"rb");
2143
2144 if (zos_test_file == NULL)
2145 {
2146 if (!silent) fprintf(stderr, "pcregrep: failed to test next file %s\n",
2147 pathname, strerror(errno));
2148 return -1;
2149 }
2150 zos_type = identifyzosfiletype (zos_test_file);
2151 fclose (zos_test_file);
2152
2153 /* Handle a PDS in separate code */
2154
2155 if (zos_type == __ZOS_PDS || zos_type == __ZOS_PDSE)
2156 {
2157 return travelonpdsdir (pathname, only_one_at_top);
2158 }
2159
2160 /* Deal with regular files in the normal way below. These types are:
2161 zos_type == __ZOS_PDS_MEMBER
2162 zos_type == __ZOS_PS
2163 zos_type == __ZOS_VSAM_KSDS
2164 zos_type == __ZOS_VSAM_ESDS
2165 zos_type == __ZOS_VSAM_RRDS
2166 */
2167
2168 /* Handle a z/OS directory using common code. */
2169
2170 else if (zos_type == __ZOS_HFS)
2171 {
2172 #endif /* NATIVE_ZOS */
2173
2174
2175 /* Handle directories: common code for all OS */
2176
2177 if (isdirectory(pathname))
2178 {
2179 if (dee_action == dee_SKIP ||
2180 !test_incexc(lastcomp, include_dir_patterns, exclude_dir_patterns))
2181 return -1;
2182
2183 if (dee_action == dee_RECURSE)
2184 {
2185 char buffer[1024];
2186 char *nextfile;
2187 directory_type *dir = opendirectory(pathname);
2188
2189 if (dir == NULL)
2190 {
2191 if (!silent)
2192 fprintf(stderr, "pcregrep: Failed to open directory %s: %s\n", pathname,
2193 strerror(errno));
2194 return 2;
2195 }
2196
2197 while ((nextfile = readdirectory(dir)) != NULL)
2198 {
2199 int frc;
2200 sprintf(buffer, "%.512s%c%.128s", pathname, FILESEP, nextfile);
2201 frc = grep_or_recurse(buffer, dir_recurse, FALSE);
2202 if (frc > 1) rc = frc;
2203 else if (frc == 0 && rc == 1) rc = 0;
2204 }
2205
2206 closedirectory(dir);
2207 return rc;
2208 }
2209 }
2210
2211 #if defined NATIVE_ZOS
2212 }
2213 #endif
2214
2215 /* If the file is not a directory, check for a regular file, and if it is not,
2216 skip it if that's been requested. Otherwise, check for an explicit inclusion or
2217 exclusion. */
2218
2219 else if (
2220 #if defined NATIVE_ZOS
2221 (zos_type == __ZOS_NOFILE && DEE_action == DEE_SKIP) ||
2222 #else /* all other OS */
2223 (!isregfile(pathname) && DEE_action == DEE_SKIP) ||
2224 #endif
2225 !test_incexc(lastcomp, include_patterns, exclude_patterns))
2226 return -1; /* File skipped */
2227
2228 /* Control reaches here if we have a regular file, or if we have a directory
2229 and recursion or skipping was not requested, or if we have anything else and
2230 skipping was not requested. The scan proceeds. If this is the first and only
2231 argument at top level, we don't show the file name, unless we are only showing
2232 the file name, or the filename was forced (-H). */
2233
2234 #if defined SUPPORT_LIBZ || defined SUPPORT_LIBBZ2
2235 pathlen = (int)(strlen(pathname));
2236 #endif
2237
2238 /* Open using zlib if it is supported and the file name ends with .gz. */
2239
2240 #ifdef SUPPORT_LIBZ
2241 if (pathlen > 3 && strcmp(pathname + pathlen - 3, ".gz") == 0)
2242 {
2243 ingz = gzopen(pathname, "rb");
2244 if (ingz == NULL)
2245 {
2246 if (!silent)
2247 fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pathname,
2248 strerror(errno));
2249 return 2;
2250 }
2251 handle = (void *)ingz;
2252 frtype = FR_LIBZ;
2253 }
2254 else
2255 #endif
2256
2257 /* Otherwise open with bz2lib if it is supported and the name ends with .bz2. */
2258
2259 #ifdef SUPPORT_LIBBZ2
2260 if (pathlen > 4 && strcmp(pathname + pathlen - 4, ".bz2") == 0)
2261 {
2262 inbz2 = BZ2_bzopen(pathname, "rb");
2263 handle = (void *)inbz2;
2264 frtype = FR_LIBBZ2;
2265 }
2266 else
2267 #endif
2268
2269 /* Otherwise use plain fopen(). The label is so that we can come back here if
2270 an attempt to read a .bz2 file indicates that it really is a plain file. */
2271
2272 #ifdef SUPPORT_LIBBZ2
2273 PLAIN_FILE:
2274 #endif
2275 {
2276 in = fopen(pathname, "rb");
2277 handle = (void *)in;
2278 frtype = FR_PLAIN;
2279 }
2280
2281 /* All the opening methods return errno when they fail. */
2282
2283 if (handle == NULL)
2284 {
2285 if (!silent)
2286 fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pathname,
2287 strerror(errno));
2288 return 2;
2289 }
2290
2291 /* Now grep the file */
2292
2293 rc = pcregrep(handle, frtype, pathname, (filenames > FN_DEFAULT ||
2294 (filenames == FN_DEFAULT && !only_one_at_top))? pathname : NULL);
2295
2296 /* Close in an appropriate manner. */
2297
2298 #ifdef SUPPORT_LIBZ
2299 if (frtype == FR_LIBZ)
2300 gzclose(ingz);
2301 else
2302 #endif
2303
2304 /* If it is a .bz2 file and the result is 3, it means that the first attempt to
2305 read failed. If the error indicates that the file isn't in fact bzipped, try
2306 again as a normal file. */
2307
2308 #ifdef SUPPORT_LIBBZ2
2309 if (frtype == FR_LIBBZ2)
2310 {
2311 if (rc == 3)
2312 {
2313 int errnum;
2314 const char *err = BZ2_bzerror(inbz2, &errnum);
2315 if (errnum == BZ_DATA_ERROR_MAGIC)
2316 {
2317 BZ2_bzclose(inbz2);
2318 goto PLAIN_FILE;
2319 }
2320 else if (!silent)
2321 fprintf(stderr, "pcregrep: Failed to read %s using bzlib: %s\n",
2322 pathname, err);
2323 rc = 2; /* The normal "something went wrong" code */
2324 }
2325 BZ2_bzclose(inbz2);
2326 }
2327 else
2328 #endif
2329
2330 /* Normal file close */
2331
2332 fclose(in);
2333
2334 /* Pass back the yield from pcregrep(). */
2335
2336 return rc;
2337 }
2338
2339
2340
2341 /*************************************************
2342 * Handle a single-letter, no data option *
2343 *************************************************/
2344
2345 static int
2346 handle_option(int letter, int options)
2347 {
2348 switch(letter)
2349 {
2350 case N_FOFFSETS: file_offsets = TRUE; break;
2351 case N_HELP: help(); pcregrep_exit(0);
2352 case N_LBUFFER: line_buffered = TRUE; break;
2353 case N_LOFFSETS: line_offsets = number = TRUE; break;
2354 case N_NOJIT: study_options &= ~PCRE_STUDY_JIT_COMPILE; break;
2355 case 'a': binary_files = BIN_TEXT; break;
2356 case 'c': count_only = TRUE; break;
2357 case 'F': process_options |= PO_FIXED_STRINGS; break;
2358 case 'H': filenames = FN_FORCE; break;
2359 case 'I': binary_files = BIN_NOMATCH; break;
2360 case 'h': filenames = FN_NONE; break;
2361 case 'i': options |= PCRE_CASELESS; break;
2362 case 'l': omit_zero_count = TRUE; filenames = FN_MATCH_ONLY; break;
2363 case 'L': filenames = FN_NOMATCH_ONLY; break;
2364 case 'M': multiline = TRUE; options |= PCRE_MULTILINE|PCRE_FIRSTLINE; break;
2365 case 'n': number = TRUE; break;
2366
2367 case 'o':
2368 only_matching_last = add_number(0, only_matching_last);
2369 if (only_matching == NULL) only_matching = only_matching_last;
2370 break;
2371
2372 case 'q': quiet = TRUE; break;
2373 case 'r': dee_action = dee_RECURSE; break;
2374 case 's': silent = TRUE; break;
2375 case 'u': options |= PCRE_UTF8; utf8 = TRUE; break;
2376 case 'v': invert = TRUE; break;
2377 case 'w': process_options |= PO_WORD_MATCH; break;
2378 case 'x': process_options |= PO_LINE_MATCH; break;
2379
2380 case 'V':
2381 fprintf(stdout, "pcregrep version %s\n", pcre_version());
2382 pcregrep_exit(0);
2383 break;
2384
2385 default:
2386 fprintf(stderr, "pcregrep: Unknown option -%c\n", letter);
2387 pcregrep_exit(usage(2));
2388 }
2389
2390 return options;
2391 }
2392
2393
2394
2395
2396 /*************************************************
2397 * Construct printed ordinal *
2398 *************************************************/
2399
2400 /* This turns a number into "1st", "3rd", etc. */
2401
2402 static char *
2403 ordin(int n)
2404 {
2405 static char buffer[8];
2406 char *p = buffer;
2407 sprintf(p, "%d", n);
2408 while (*p != 0) p++;
2409 switch (n%10)
2410 {
2411 case 1: strcpy(p, "st"); break;
2412 case 2: strcpy(p, "nd"); break;
2413 case 3: strcpy(p, "rd"); break;
2414 default: strcpy(p, "th"); break;
2415 }
2416 return buffer;
2417 }
2418
2419
2420
2421 /*************************************************
2422 * Compile a single pattern *
2423 *************************************************/
2424
2425 /* Do nothing if the pattern has already been compiled. This is the case for
2426 include/exclude patterns read from a file.
2427
2428 When the -F option has been used, each "pattern" may be a list of strings,
2429 separated by line breaks. They will be matched literally. We split such a
2430 string and compile the first substring, inserting an additional block into the
2431 pattern chain.
2432
2433 Arguments:
2434 p points to the pattern block
2435 options the PCRE options
2436 popts the processing options
2437 fromfile TRUE if the pattern was read from a file
2438 fromtext file name or identifying text (e.g. "include")
2439 count 0 if this is the only command line pattern, or
2440 number of the command line pattern, or
2441 linenumber for a pattern from a file
2442
2443 Returns: TRUE on success, FALSE after an error
2444 */
2445
2446 static BOOL
2447 compile_pattern(patstr *p, int options, int popts, int fromfile,
2448 const char *fromtext, int count)
2449 {
2450 char buffer[PATBUFSIZE];
2451 const char *error;
2452 char *ps = p->string;
2453 int patlen = strlen(ps);
2454 int errptr;
2455
2456 if (p->compiled != NULL) return TRUE;
2457
2458 if ((popts & PO_FIXED_STRINGS) != 0)
2459 {
2460 int ellength;
2461 char *eop = ps + patlen;
2462 char *pe = end_of_line(ps, eop, &ellength);
2463
2464 if (ellength != 0)
2465 {
2466 if (add_pattern(pe, p) == NULL) return FALSE;
2467 patlen = (int)(pe - ps - ellength);
2468 }
2469 }
2470
2471 sprintf(buffer, "%s%.*s%s", prefix[popts], patlen, ps, suffix[popts]);
2472 p->compiled = pcre_compile(buffer, options, &error, &errptr, pcretables);
2473 if (p->compiled != NULL) return TRUE;
2474
2475 /* Handle compile errors */
2476
2477 errptr -= (int)strlen(prefix[popts]);
2478 if (errptr > patlen) errptr = patlen;
2479
2480 if (fromfile)
2481 {
2482 fprintf(stderr, "pcregrep: Error in regex in line %d of %s "
2483 "at offset %d: %s\n", count, fromtext, errptr, error);
2484 }
2485 else
2486 {
2487 if (count == 0)
2488 fprintf(stderr, "pcregrep: Error in %s regex at offset %d: %s\n",
2489 fromtext, errptr, error);
2490 else
2491 fprintf(stderr, "pcregrep: Error in %s %s regex at offset %d: %s\n",
2492 ordin(count), fromtext, errptr, error);
2493 }
2494
2495 return FALSE;
2496 }
2497
2498
2499
2500 /*************************************************
2501 * Read and compile a file of patterns *
2502 *************************************************/
2503
2504 /* This is used for --filelist, --include-from, and --exclude-from.
2505
2506 Arguments:
2507 name the name of the file; "-" is stdin
2508 patptr pointer to the pattern chain anchor
2509 patlastptr pointer to the last pattern pointer
2510 popts the process options to pass to pattern_compile()
2511
2512 Returns: TRUE if all went well
2513 */
2514
2515 static BOOL
2516 read_pattern_file(char *name, patstr **patptr, patstr **patlastptr, int popts)
2517 {
2518 int linenumber = 0;
2519 FILE *f;
2520 char *filename;
2521 char buffer[PATBUFSIZE];
2522
2523 if (strcmp(name, "-") == 0)
2524 {
2525 f = stdin;
2526 filename = stdin_name;
2527 }
2528 else
2529 {
2530 f = fopen(name, "r");
2531 if (f == NULL)
2532 {
2533 fprintf(stderr, "pcregrep: Failed to open %s: %s\n", name, strerror(errno));
2534 return FALSE;
2535 }
2536 filename = name;
2537 }
2538
2539 while (fgets(buffer, PATBUFSIZE, f) != NULL)
2540 {
2541 char *s = buffer + (int)strlen(buffer);
2542 while (s > buffer && isspace((unsigned char)(s[-1]))) s--;
2543 *s = 0;
2544 linenumber++;
2545 if (buffer[0] == 0) continue; /* Skip blank lines */
2546
2547 /* Note: this call to add_pattern() puts a pointer to the local variable
2548 "buffer" into the pattern chain. However, that pointer is used only when
2549 compiling the pattern, which happens immediately below, so we flatten it
2550 afterwards, as a precaution against any later code trying to use it. */
2551
2552 *patlastptr = add_pattern(buffer, *patlastptr);
2553 if (*patlastptr == NULL)
2554 {
2555 if (f != stdin) fclose(f);
2556 return FALSE;
2557 }
2558 if (*patptr == NULL) *patptr = *patlastptr;
2559
2560 /* This loop is needed because compiling a "pattern" when -F is set may add
2561 on additional literal patterns if the original contains a newline. In the
2562 common case, it never will, because fgets() stops at a newline. However,
2563 the -N option can be used to give pcregrep a different newline setting. */
2564
2565 for(;;)
2566 {
2567 if (!compile_pattern(*patlastptr, pcre_options, popts, TRUE, filename,
2568 linenumber))
2569 {
2570 if (f != stdin) fclose(f);
2571 return FALSE;
2572 }
2573 (*patlastptr)->string = NULL; /* Insurance */
2574 if ((*patlastptr)->next == NULL) break;
2575 *patlastptr = (*patlastptr)->next;
2576 }
2577 }
2578
2579 if (f != stdin) fclose(f);
2580 return TRUE;
2581 }
2582
2583
2584
2585 /*************************************************
2586 * Main program *
2587 *************************************************/
2588
2589 /* Returns 0 if something matched, 1 if nothing matched, 2 after an error. */
2590
2591 int
2592 main(int argc, char **argv)
2593 {
2594 int i, j;
2595 int rc = 1;
2596 BOOL only_one_at_top;
2597 patstr *cp;
2598 fnstr *fn;
2599 const char *locale_from = "--locale";
2600 const char *error;
2601
2602 #ifdef SUPPORT_PCREGREP_JIT
2603 pcre_jit_stack *jit_stack = NULL;
2604 #endif
2605
2606 /* Set the default line ending value from the default in the PCRE library;
2607 "lf", "cr", "crlf", and "any" are supported. Anything else is treated as "lf".
2608 Note that the return values from pcre_config(), though derived from the ASCII
2609 codes, are the same in EBCDIC environments, so we must use the actual values
2610 rather than escapes such as as '\r'. */
2611
2612 (void)pcre_config(PCRE_CONFIG_NEWLINE, &i);
2613 switch(i)
2614 {
2615 default: newline = (char *)"lf"; break;
2616 case 13: newline = (char *)"cr"; break;
2617 case (13 << 8) | 10: newline = (char *)"crlf"; break;
2618 case -1: newline = (char *)"any"; break;
2619 case -2: newline = (char *)"anycrlf"; break;
2620 }
2621
2622 /* Process the options */
2623
2624 for (i = 1; i < argc; i++)
2625 {
2626 option_item *op = NULL;
2627 char *option_data = (char *)""; /* default to keep compiler happy */
2628 BOOL longop;
2629 BOOL longopwasequals = FALSE;
2630
2631 if (argv[i][0] != '-') break;
2632
2633 /* If we hit an argument that is just "-", it may be a reference to STDIN,
2634 but only if we have previously had -e or -f to define the patterns. */
2635
2636 if (argv[i][1] == 0)
2637 {
2638 if (pattern_files != NULL || patterns != NULL) break;
2639 else pcregrep_exit(usage(2));
2640 }
2641
2642 /* Handle a long name option, or -- to terminate the options */
2643
2644 if (argv[i][1] == '-')
2645 {
2646 char *arg = argv[i] + 2;
2647 char *argequals = strchr(arg, '=');
2648
2649 if (*arg == 0) /* -- terminates options */
2650 {
2651 i++;
2652 break; /* out of the options-handling loop */
2653 }
2654
2655 longop = TRUE;
2656
2657 /* Some long options have data that follows after =, for example file=name.
2658 Some options have variations in the long name spelling: specifically, we
2659 allow "regexp" because GNU grep allows it, though I personally go along
2660 with Jeffrey Friedl and Larry Wall in preferring "regex" without the "p".
2661 These options are entered in the table as "regex(p)". Options can be in
2662 both these categories. */
2663
2664 for (op = optionlist; op->one_char != 0; op++)
2665 {
2666 char *opbra = strchr(op->long_name, '(');
2667 char *equals = strchr(op->long_name, '=');
2668
2669 /* Handle options with only one spelling of the name */
2670
2671 if (opbra == NULL) /* Does not contain '(' */
2672 {
2673 if (equals == NULL) /* Not thing=data case */
2674 {
2675 if (strcmp(arg, op->long_name) == 0) break;
2676 }
2677 else /* Special case xxx=data */
2678 {
2679 int oplen = (int)(equals - op->long_name);
2680 int arglen = (argequals == NULL)?
2681 (int)strlen(arg) : (int)(argequals - arg);
2682 if (oplen == arglen && strncmp(arg, op->long_name, oplen) == 0)
2683 {
2684 option_data = arg + arglen;
2685 if (*option_data == '=')
2686 {
2687 option_data++;
2688 longopwasequals = TRUE;
2689 }
2690 break;
2691 }
2692 }
2693 }
2694
2695 /* Handle options with an alternate spelling of the name */
2696
2697 else
2698 {
2699 char buff1[24];
2700 char buff2[24];
2701
2702 int baselen = (int)(opbra - op->long_name);
2703 int fulllen = (int)(strchr(op->long_name, ')') - op->long_name + 1);
2704 int arglen = (argequals == NULL || equals == NULL)?
2705 (int)strlen(arg) : (int)(argequals - arg);
2706
2707 sprintf(buff1, "%.*s", baselen, op->long_name);
2708 sprintf(buff2, "%s%.*s", buff1, fulllen - baselen - 2, opbra + 1);
2709
2710 if (strncmp(arg, buff1, arglen) == 0 ||
2711 strncmp(arg, buff2, arglen) == 0)
2712 {
2713 if (equals != NULL && argequals != NULL)
2714 {
2715 option_data = argequals;
2716 if (*option_data == '=')
2717 {
2718 option_data++;
2719 longopwasequals = TRUE;
2720 }
2721 }
2722 break;
2723 }
2724 }
2725 }
2726
2727 if (op->one_char == 0)
2728 {
2729 fprintf(stderr, "pcregrep: Unknown option %s\n", argv[i]);
2730 pcregrep_exit(usage(2));
2731 }
2732 }
2733
2734 /* Jeffrey Friedl's debugging harness uses these additional options which
2735 are not in the right form for putting in the option table because they use
2736 only one hyphen, yet are more than one character long. By putting them
2737 separately here, they will not get displayed as part of the help() output,
2738 but I don't think Jeffrey will care about that. */
2739
2740 #ifdef JFRIEDL_DEBUG
2741 else if (strcmp(argv[i], "-pre") == 0) {
2742 jfriedl_prefix = argv[++i];
2743 continue;
2744 } else if (strcmp(argv[i], "-post") == 0) {
2745 jfriedl_postfix = argv[++i];
2746 continue;
2747 } else if (strcmp(argv[i], "-XT") == 0) {
2748 sscanf(argv[++i], "%d", &jfriedl_XT);
2749 continue;
2750 } else if (strcmp(argv[i], "-XR") == 0) {
2751 sscanf(argv[++i], "%d", &jfriedl_XR);
2752 continue;
2753 }
2754 #endif
2755
2756
2757 /* One-char options; many that have no data may be in a single argument; we
2758 continue till we hit the last one or one that needs data. */
2759
2760 else
2761 {
2762 char *s = argv[i] + 1;
2763 longop = FALSE;
2764
2765 while (*s != 0)
2766 {
2767 for (op = optionlist; op->one_char != 0; op++)
2768 {
2769 if (*s == op->one_char) break;
2770 }
2771 if (op->one_char == 0)
2772 {
2773 fprintf(stderr, "pcregrep: Unknown option letter '%c' in \"%s\"\n",
2774 *s, argv[i]);
2775 pcregrep_exit(usage(2));
2776 }
2777
2778 option_data = s+1;
2779
2780 /* Break out if this is the last character in the string; it's handled
2781 below like a single multi-char option. */
2782
2783 if (*option_data == 0) break;
2784
2785 /* Check for a single-character option that has data: OP_OP_NUMBER(S)
2786 are used for ones that either have a numerical number or defaults, i.e.
2787 the data is optional. If a digit follows, there is data; if not, carry on
2788 with other single-character options in the same string. */
2789
2790 if (op->type == OP_OP_NUMBER || op->type == OP_OP_NUMBERS)
2791 {
2792 if (isdigit((unsigned char)s[1])) break;
2793 }
2794 else /* Check for an option with data */
2795 {
2796 if (op->type != OP_NODATA) break;
2797 }
2798
2799 /* Handle a single-character option with no data, then loop for the
2800 next character in the string. */
2801
2802 pcre_options = handle_option(*s++, pcre_options);
2803 }
2804 }
2805
2806 /* At this point we should have op pointing to a matched option. If the type
2807 is NO_DATA, it means that there is no data, and the option might set
2808 something in the PCRE options. */
2809
2810 if (op->type == OP_NODATA)
2811 {
2812 pcre_options = handle_option(op->one_char, pcre_options);
2813 continue;
2814 }
2815
2816 /* If the option type is OP_OP_STRING or OP_OP_NUMBER(S), it's an option that
2817 either has a value or defaults to something. It cannot have data in a
2818 separate item. At the moment, the only such options are "colo(u)r",
2819 "only-matching", and Jeffrey Friedl's special -S debugging option. */
2820
2821 if (*option_data == 0 &&
2822 (op->type == OP_OP_STRING || op->type == OP_OP_NUMBER ||
2823 op->type == OP_OP_NUMBERS))
2824 {
2825 switch (op->one_char)
2826 {
2827 case N_COLOUR:
2828 colour_option = (char *)"auto";
2829 break;
2830
2831 case 'o':
2832 only_matching_last = add_number(0, only_matching_last);
2833 if (only_matching == NULL) only_matching = only_matching_last;
2834 break;
2835
2836 #ifdef JFRIEDL_DEBUG
2837 case 'S':
2838 S_arg = 0;
2839 break;
2840 #endif
2841 }
2842 continue;
2843 }
2844
2845 /* Otherwise, find the data string for the option. */
2846
2847 if (*option_data == 0)
2848 {
2849 if (i >= argc - 1 || longopwasequals)
2850 {
2851 fprintf(stderr, "pcregrep: Data missing after %s\n", argv[i]);
2852 pcregrep_exit(usage(2));
2853 }
2854 option_data = argv[++i];
2855 }
2856
2857 /* If the option type is OP_OP_NUMBERS, the value is a number that is to be
2858 added to a chain of numbers. */
2859
2860 if (op->type == OP_OP_NUMBERS)
2861 {
2862 unsigned long int n = decode_number(option_data, op, longop);
2863 omdatastr *omd = (omdatastr *)op->dataptr;
2864 *(omd->lastptr) = add_number((int)n, *(omd->lastptr));
2865 if (*(omd->anchor) == NULL) *(omd->anchor) = *(omd->lastptr);
2866 }
2867
2868 /* If the option type is OP_PATLIST, it's the -e option, or one of the
2869 include/exclude options, which can be called multiple times to create lists
2870 of patterns. */
2871
2872 else if (op->type == OP_PATLIST)
2873 {
2874 patdatastr *pd = (patdatastr *)op->dataptr;
2875 *(pd->lastptr) = add_pattern(option_data, *(pd->lastptr));
2876 if (*(pd->lastptr) == NULL) goto EXIT2;
2877 if (*(pd->anchor) == NULL) *(pd->anchor) = *(pd->lastptr);
2878 }
2879
2880 /* If the option type is OP_FILELIST, it's one of the options that names a
2881 file. */
2882
2883 else if (op->type == OP_FILELIST)
2884 {
2885 fndatastr *fd = (fndatastr *)op->dataptr;
2886 fn = (fnstr *)malloc(sizeof(fnstr));
2887 if (fn == NULL)
2888 {
2889 fprintf(stderr, "pcregrep: malloc failed\n");
2890 goto EXIT2;
2891 }
2892 fn->next = NULL;
2893 fn->name = option_data;
2894 if (*(fd->anchor) == NULL)
2895 *(fd->anchor) = fn;
2896 else
2897 (*(fd->lastptr))->next = fn;
2898 *(fd->lastptr) = fn;
2899 }
2900
2901 /* Handle OP_BINARY_FILES */
2902
2903 else if (op->type == OP_BINFILES)
2904 {
2905 if (strcmp(option_data, "binary") == 0)
2906 binary_files = BIN_BINARY;
2907 else if (strcmp(option_data, "without-match") == 0)
2908 binary_files = BIN_NOMATCH;
2909 else if (strcmp(option_data, "text") == 0)
2910 binary_files = BIN_TEXT;
2911 else
2912 {
2913 fprintf(stderr, "pcregrep: unknown value \"%s\" for binary-files\n",
2914 option_data);
2915 pcregrep_exit(usage(2));
2916 }
2917 }
2918
2919 /* Otherwise, deal with a single string or numeric data value. */
2920
2921 else if (op->type != OP_NUMBER && op->type != OP_LONGNUMBER &&
2922 op->type != OP_OP_NUMBER)
2923 {
2924 *((char **)op->dataptr) = option_data;
2925 }
2926 else
2927 {
2928 unsigned long int n = decode_number(option_data, op, longop);
2929 if (op->type == OP_LONGNUMBER) *((unsigned long int *)op->dataptr) = n;
2930 else *((int *)op->dataptr) = n;
2931 }
2932 }
2933
2934 /* Options have been decoded. If -C was used, its value is used as a default
2935 for -A and -B. */
2936
2937 if (both_context > 0)
2938 {
2939 if (after_context == 0) after_context = both_context;
2940 if (before_context == 0) before_context = both_context;
2941 }
2942
2943 /* Only one of --only-matching, --file-offsets, or --line-offsets is permitted.
2944 However, all three set show_only_matching because they display, each in their
2945 own way, only the data that has matched. */
2946
2947 if ((only_matching != NULL && (file_offsets || line_offsets)) ||
2948 (file_offsets && line_offsets))
2949 {
2950 fprintf(stderr, "pcregrep: Cannot mix --only-matching, --file-offsets "
2951 "and/or --line-offsets\n");
2952 pcregrep_exit(usage(2));
2953 }
2954
2955 if (only_matching != NULL || file_offsets || line_offsets)
2956 show_only_matching = TRUE;
2957
2958 /* If a locale has not been provided as an option, see if the LC_CTYPE or
2959 LC_ALL environment variable is set, and if so, use it. */
2960
2961 if (locale == NULL)
2962 {
2963 locale = getenv("LC_ALL");
2964 locale_from = "LCC_ALL";
2965 }
2966
2967 if (locale == NULL)
2968 {
2969 locale = getenv("LC_CTYPE");
2970 locale_from = "LC_CTYPE";
2971 }
2972
2973 /* If a locale is set, use it to generate the tables the PCRE needs. Otherwise,
2974 pcretables==NULL, which causes the use of default tables. */
2975
2976 if (locale != NULL)
2977 {
2978 if (setlocale(LC_CTYPE, locale) == NULL)
2979 {
2980 fprintf(stderr, "pcregrep: Failed to set locale %s (obtained from %s)\n",
2981 locale, locale_from);
2982 goto EXIT2;
2983 }
2984 pcretables = pcre_maketables();
2985 }
2986
2987 /* Sort out colouring */
2988
2989 if (colour_option != NULL && strcmp(colour_option, "never") != 0)
2990 {
2991 if (strcmp(colour_option, "always") == 0) do_colour = TRUE;
2992 else if (strcmp(colour_option, "auto") == 0) do_colour = is_stdout_tty();
2993 else
2994 {
2995 fprintf(stderr, "pcregrep: Unknown colour setting \"%s\"\n",
2996 colour_option);
2997 goto EXIT2;
2998 }
2999 if (do_colour)
3000 {
3001 char *cs = getenv("PCREGREP_COLOUR");
3002 if (cs == NULL) cs = getenv("PCREGREP_COLOR");
3003 if (cs != NULL) colour_string = cs;
3004 }
3005 }
3006
3007 /* Interpret the newline type; the default settings are Unix-like. */
3008
3009 if (strcmp(newline, "cr") == 0 || strcmp(newline, "CR") == 0)
3010 {
3011 pcre_options |= PCRE_NEWLINE_CR;
3012 endlinetype = EL_CR;
3013 }
3014 else if (strcmp(newline, "lf") == 0 || strcmp(newline, "LF") == 0)
3015 {
3016 pcre_options |= PCRE_NEWLINE_LF;
3017 endlinetype = EL_LF;
3018 }
3019 else if (strcmp(newline, "crlf") == 0 || strcmp(newline, "CRLF") == 0)
3020 {
3021 pcre_options |= PCRE_NEWLINE_CRLF;
3022 endlinetype = EL_CRLF;
3023 }
3024 else if (strcmp(newline, "any") == 0 || strcmp(newline, "ANY") == 0)
3025 {
3026 pcre_options |= PCRE_NEWLINE_ANY;
3027 endlinetype = EL_ANY;
3028 }
3029 else if (strcmp(newline, "anycrlf") == 0 || strcmp(newline, "ANYCRLF") == 0)
3030 {
3031 pcre_options |= PCRE_NEWLINE_ANYCRLF;
3032 endlinetype = EL_ANYCRLF;
3033 }
3034 else
3035 {
3036 fprintf(stderr, "pcregrep: Invalid newline specifier \"%s\"\n", newline);
3037 goto EXIT2;
3038 }
3039
3040 /* Interpret the text values for -d and -D */
3041
3042 if (dee_option != NULL)
3043 {
3044 if (strcmp(dee_option, "read") == 0) dee_action = dee_READ;
3045 else if (strcmp(dee_option, "recurse") == 0) dee_action = dee_RECURSE;
3046 else if (strcmp(dee_option, "skip") == 0) dee_action = dee_SKIP;
3047 else
3048 {
3049 fprintf(stderr, "pcregrep: Invalid value \"%s\" for -d\n", dee_option);
3050 goto EXIT2;
3051 }
3052 }
3053
3054 if (DEE_option != NULL)
3055 {
3056 if (strcmp(DEE_option, "read") == 0) DEE_action = DEE_READ;
3057 else if (strcmp(DEE_option, "skip") == 0) DEE_action = DEE_SKIP;
3058 else
3059 {
3060 fprintf(stderr, "pcregrep: Invalid value \"%s\" for -D\n", DEE_option);
3061 goto EXIT2;
3062 }
3063 }
3064
3065 /* Check the values for Jeffrey Friedl's debugging options. */
3066
3067 #ifdef JFRIEDL_DEBUG
3068 if (S_arg > 9)
3069 {
3070 fprintf(stderr, "pcregrep: bad value for -S option\n");
3071 return 2;
3072 }
3073 if (jfriedl_XT != 0 || jfriedl_XR != 0)
3074 {
3075 if (jfriedl_XT == 0) jfriedl_XT = 1;
3076 if (jfriedl_XR == 0) jfriedl_XR = 1;
3077 }
3078 #endif
3079
3080 /* Get memory for the main buffer. */
3081
3082 bufsize = 3*bufthird;
3083 main_buffer = (char *)malloc(bufsize);
3084
3085 if (main_buffer == NULL)
3086 {
3087 fprintf(stderr, "pcregrep: malloc failed\n");
3088 goto EXIT2;
3089 }
3090
3091 /* If no patterns were provided by -e, and there are no files provided by -f,
3092 the first argument is the one and only pattern, and it must exist. */
3093
3094 if (patterns == NULL && pattern_files == NULL)
3095 {
3096 if (i >= argc) return usage(2);
3097 patterns = patterns_last = add_pattern(argv[i++], NULL);
3098 if (patterns == NULL) goto EXIT2;
3099 }
3100
3101 /* Compile the patterns that were provided on the command line, either by
3102 multiple uses of -e or as a single unkeyed pattern. We cannot do this until
3103 after all the command-line options are read so that we know which PCRE options
3104 to use. When -F is used, compile_pattern() may add another block into the
3105 chain, so we must not access the next pointer till after the compile. */
3106
3107 for (j = 1, cp = patterns; cp != NULL; j++, cp = cp->next)
3108 {
3109 if (!compile_pattern(cp, pcre_options, process_options, FALSE, "command-line",
3110 (j == 1 && patterns->next == NULL)? 0 : j))
3111 goto EXIT2;
3112 }
3113
3114 /* Read and compile the regular expressions that are provided in files. */
3115
3116 for (fn = pattern_files; fn != NULL; fn = fn->next)
3117 {
3118 if (!read_pattern_file(fn->name, &patterns, &patterns_last, process_options))
3119 goto EXIT2;
3120 }
3121
3122 /* Study the regular expressions, as we will be running them many times. If an
3123 extra block is needed for a limit, set PCRE_STUDY_EXTRA_NEEDED so that one is
3124 returned, even if studying produces no data. */
3125
3126 if (match_limit > 0 || match_limit_recursion > 0)
3127 study_options |= PCRE_STUDY_EXTRA_NEEDED;
3128
3129 /* Unless JIT has been explicitly disabled, arrange a stack for it to use. */
3130
3131 #ifdef SUPPORT_PCREGREP_JIT
3132 if ((study_options & PCRE_STUDY_JIT_COMPILE) != 0)
3133 jit_stack = pcre_jit_stack_alloc(32*1024, 1024*1024);
3134 #endif
3135
3136 for (j = 1, cp = patterns; cp != NULL; j++, cp = cp->next)
3137 {
3138 cp->hint = pcre_study(cp->compiled, study_options, &error);
3139 if (error != NULL)
3140 {
3141 char s[16];
3142 if (patterns->next == NULL) s[0] = 0; else sprintf(s, " number %d", j);
3143 fprintf(stderr, "pcregrep: Error while studying regex%s: %s\n", s, error);
3144 goto EXIT2;
3145 }
3146 #ifdef SUPPORT_PCREGREP_JIT
3147 if (jit_stack != NULL && cp->hint != NULL)
3148 pcre_assign_jit_stack(cp->hint, NULL, jit_stack);
3149 #endif
3150 }
3151
3152 /* If --match-limit or --recursion-limit was set, put the value(s) into the
3153 pcre_extra block for each pattern. There will always be an extra block because
3154 of the use of PCRE_STUDY_EXTRA_NEEDED above. */
3155
3156 for (cp = patterns; cp != NULL; cp = cp->next)
3157 {
3158 if (match_limit > 0)
3159 {
3160 cp->hint->flags |= PCRE_EXTRA_MATCH_LIMIT;
3161 cp->hint->match_limit = match_limit;
3162 }
3163
3164 if (match_limit_recursion > 0)
3165 {
3166 cp->hint->flags |= PCRE_EXTRA_MATCH_LIMIT_RECURSION;
3167 cp->hint->match_limit_recursion = match_limit_recursion;
3168 }
3169 }
3170
3171 /* If there are include or exclude patterns read from the command line, compile
3172 them. -F, -w, and -x do not apply, so the third argument of compile_pattern is
3173 0. */
3174
3175 for (j = 0; j < 4; j++)
3176 {
3177 int k;
3178 for (k = 1, cp = *(incexlist[j]); cp != NULL; k++, cp = cp->next)
3179 {
3180 if (!compile_pattern(cp, pcre_options, 0, FALSE, incexname[j],
3181 (k == 1 && cp->next == NULL)? 0 : k))
3182 goto EXIT2;
3183 }
3184 }
3185
3186 /* Read and compile include/exclude patterns from files. */
3187
3188 for (fn = include_from; fn != NULL; fn = fn->next)
3189 {
3190 if (!read_pattern_file(fn->name, &include_patterns, &include_patterns_last, 0))
3191 goto EXIT2;
3192 }
3193
3194 for (fn = exclude_from; fn != NULL; fn = fn->next)
3195 {
3196 if (!read_pattern_file(fn->name, &exclude_patterns, &exclude_patterns_last, 0))
3197 goto EXIT2;
3198 }
3199
3200 /* If there are no files that contain lists of files to search, and there are
3201 no file arguments, search stdin, and then exit. */
3202
3203 if (file_lists == NULL && i >= argc)
3204 {
3205 rc = pcregrep(stdin, FR_PLAIN, stdin_name,
3206 (filenames > FN_DEFAULT)? stdin_name : NULL);
3207 goto EXIT;
3208 }
3209
3210 /* If any files that contains a list of files to search have been specified,
3211 read them line by line and search the given files. */
3212
3213 for (fn = file_lists; fn != NULL; fn = fn->next)
3214 {
3215 char buffer[PATBUFSIZE];
3216 FILE *fl;
3217 if (strcmp(fn->name, "-") == 0) fl = stdin; else
3218 {
3219 fl = fopen(fn->name, "rb");
3220 if (fl == NULL)
3221 {
3222 fprintf(stderr, "pcregrep: Failed to open %s: %s\n", fn->name,
3223 strerror(errno));
3224 goto EXIT2;
3225 }
3226 }
3227 while (fgets(buffer, PATBUFSIZE, fl) != NULL)
3228 {
3229 int frc;
3230 char *end = buffer + (int)strlen(buffer);
3231 while (end > buffer && isspace(end[-1])) end--;
3232 *end = 0;
3233 if (*buffer != 0)
3234 {
3235 frc = grep_or_recurse(buffer, dee_action == dee_RECURSE, FALSE);
3236 if (frc > 1) rc = frc;
3237 else if (frc == 0 && rc == 1) rc = 0;
3238 }
3239 }
3240 if (fl != stdin) fclose(fl);
3241 }
3242
3243 /* After handling file-list, work through remaining arguments. Pass in the fact
3244 that there is only one argument at top level - this suppresses the file name if
3245 the argument is not a directory and filenames are not otherwise forced. */
3246
3247 only_one_at_top = i == argc - 1 && file_lists == NULL;
3248
3249 for (; i < argc; i++)
3250 {
3251 int frc = grep_or_recurse(argv[i], dee_action == dee_RECURSE,
3252 only_one_at_top);
3253 if (frc > 1) rc = frc;
3254 else if (frc == 0 && rc == 1) rc = 0;
3255 }
3256
3257 EXIT:
3258 #ifdef SUPPORT_PCREGREP_JIT
3259 if (jit_stack != NULL) pcre_jit_stack_free(jit_stack);
3260 #endif
3261
3262 free(main_buffer);
3263 free((void *)pcretables);
3264
3265 free_pattern_chain(patterns);
3266 free_pattern_chain(include_patterns);
3267 free_pattern_chain(include_dir_patterns);
3268 free_pattern_chain(exclude_patterns);
3269 free_pattern_chain(exclude_dir_patterns);
3270
3271 free_file_chain(exclude_from);
3272 free_file_chain(include_from);
3273 free_file_chain(pattern_files);
3274 free_file_chain(file_lists);
3275
3276 while (only_matching != NULL)
3277 {
3278 omstr *this = only_matching;
3279 only_matching = this->next;
3280 free(this);
3281 }
3282
3283 pcregrep_exit(rc);
3284
3285 EXIT2:
3286 rc = 2;
3287 goto EXIT;
3288 }
3289
3290 /* End of pcregrep */

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