summaryrefslogtreecommitdiffstats
path: root/contrib/patch/patch.c
blob: 7eb83f5da26bcb5315e97fb3796c078e76d271fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
/* patch - a program to apply diffs to original files */

/* $Id: patch.c,v 1.23 1997/07/05 10:32:23 eggert Exp $ */

/*
Copyright 1984, 1985, 1986, 1987, 1988 Larry Wall
Copyright 1989, 1990, 1991, 1992, 1993, 1997 Free Software Foundation, Inc.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#define XTERN
#include <common.h>
#undef XTERN
#define XTERN extern
#include <argmatch.h>
#include <backupfile.h>
#include <getopt.h>
#include <inp.h>
#include <pch.h>
#include <util.h>
#include <version.h>

#if HAVE_UTIME_H
# include <utime.h>
#endif
/* Some nonstandard hosts don't declare this structure even in <utime.h>.  */
#if ! HAVE_STRUCT_UTIMBUF
struct utimbuf
{
  time_t actime;
  time_t modtime;
};
#endif

/* Output stream state.  */
struct outstate
{
  FILE *ofp;
  int after_newline;
  int zero_output;
};

/* procedures */

static FILE *create_output_file PARAMS ((char const *));
static LINENUM locate_hunk PARAMS ((LINENUM));
static bool apply_hunk PARAMS ((struct outstate *, LINENUM));
static bool copy_till PARAMS ((struct outstate *, LINENUM));
static bool patch_match PARAMS ((LINENUM, LINENUM, LINENUM, LINENUM));
static bool similar PARAMS ((char const *, size_t, char const *, size_t));
static bool spew_output PARAMS ((struct outstate *));
static char const *make_temp PARAMS ((int));
static int numeric_string PARAMS ((char const *, int, char const *));
static void abort_hunk PARAMS ((void));
static void cleanup PARAMS ((void));
static void get_some_switches PARAMS ((void));
static void init_output PARAMS ((char const *, struct outstate *));
static void init_reject PARAMS ((char const *));
static void reinitialize_almost_everything PARAMS ((void));
static void usage PARAMS ((FILE *, int)) __attribute__((noreturn));

static int make_backups;
static int backup_if_mismatch;
static char const *version_control;
static int remove_empty_files;

/* TRUE if -R was specified on command line.  */
static int reverse_flag_specified;

/* how many input lines have been irretractably output */
static LINENUM last_frozen_line;

static char const *do_defines; /* symbol to patch using ifdef, ifndef, etc. */
static char const if_defined[] = "\n#ifdef %s\n";
static char const not_defined[] = "#ifndef %s\n";
static char const else_defined[] = "\n#else\n";
static char const end_defined[] = "\n#endif /* %s */\n";

static int Argc;
static char * const *Argv;

static FILE *rejfp;  /* reject file pointer */

static char const *patchname;
static char *rejname;
static char const * volatile TMPREJNAME;

static LINENUM last_offset;
static LINENUM maxfuzz = 2;

static char serrbuf[BUFSIZ];

char const program_name[] = "patch";

/* Apply a set of diffs as appropriate. */

int main PARAMS ((int, char **));

int
main(argc,argv)
int argc;
char **argv;
{
    char const *val;
    bool somefailed = FALSE;
    struct outstate outstate;

    init_time ();

    setbuf(stderr, serrbuf);

    bufsize = 8 * 1024;
    buf = xmalloc (bufsize);

    strippath = INT_MAX;

    posixly_correct = getenv ("POSIXLY_CORRECT") != 0;
    backup_if_mismatch = ! posixly_correct;
    patch_get = ((val = getenv ("PATCH_GET"))
		 ? numeric_string (val, 1, "PATCH_GET value")
		 : posixly_correct - 1);

    {
      char const *v = getenv ("SIMPLE_BACKUP_SUFFIX");
      if (v && *v)
	simple_backup_suffix = v;
    }

    version_control = getenv ("PATCH_VERSION_CONTROL");
    if (! version_control)
      version_control = getenv ("VERSION_CONTROL");

    /* Cons up the names of the global temporary files.
       Do this before `cleanup' can possibly be called (e.g. by `pfatal').  */
    TMPOUTNAME = make_temp ('o');
    TMPINNAME = make_temp ('i');
    TMPREJNAME = make_temp ('r');
    TMPPATNAME = make_temp ('p');

    /* parse switches */
    Argc = argc;
    Argv = argv;
    get_some_switches();

    if (make_backups | backup_if_mismatch)
      backup_type = get_version (version_control);

    init_output (outfile, &outstate);

    /* Make sure we clean up in case of disaster.  */
    set_signals(0);

    for (
	open_patch_file (patchname);
	there_is_another_patch();
	reinitialize_almost_everything()
    ) {					/* for each patch in patch file */
      int hunk = 0;
      int failed = 0;
      int mismatch = 0;
      char *outname = outfile ? outfile : inname;

      if (!skip_rest_of_patch)
	get_input_file (inname, outname);

      if (diff_type == ED_DIFF) {
	outstate.zero_output = 0;
	if (! dry_run)
	  {
	    do_ed_script (outstate.ofp);
	    if (! outfile)
	      {
		struct stat statbuf;
		if (stat (TMPOUTNAME, &statbuf) != 0)
		  pfatal ("%s", TMPOUTNAME);
		outstate.zero_output = statbuf.st_size == 0;
	      }
	  }
      } else {
	int got_hunk;
	int apply_anyway = 0;

	/* initialize the patched file */
	if (! skip_rest_of_patch && ! outfile)
	  init_output (TMPOUTNAME, &outstate);

	/* initialize reject file */
	init_reject(TMPREJNAME);

	/* find out where all the lines are */
	if (!skip_rest_of_patch)
	    scan_input (inname);

	/* from here on, open no standard i/o files, because malloc */
	/* might misfire and we can't catch it easily */

	/* apply each hunk of patch */
	while (0 < (got_hunk = another_hunk (diff_type, reverse))) {
	    LINENUM where = 0; /* Pacify `gcc -Wall'.  */
	    LINENUM newwhere;
	    LINENUM fuzz = 0;
	    LINENUM prefix_context = pch_prefix_context ();
	    LINENUM suffix_context = pch_suffix_context ();
	    LINENUM context = (prefix_context < suffix_context
			       ? suffix_context : prefix_context);
	    LINENUM mymaxfuzz = (maxfuzz < context ? maxfuzz : context);
	    hunk++;
	    if (!skip_rest_of_patch) {
		do {
		    where = locate_hunk(fuzz);
		    if (! where || fuzz || last_offset)
		      mismatch = 1;
		    if (hunk == 1 && ! where && ! (force | apply_anyway)
			&& reverse == reverse_flag_specified) {
						/* dwim for reversed patch? */
			if (!pch_swap()) {
			    say (
"Not enough memory to try swapped hunk!  Assuming unswapped.\n");
			    continue;
			}
			/* Try again.  */
			where = locate_hunk (fuzz);
			if (where
			    && (ok_to_reverse
				("%s patch detected!",
				 (reverse
				  ? "Unreversed"
				  : "Reversed (or previously applied)"))))
			  reverse ^= 1;
			else
			  {
			    /* Put it back to normal.  */
			    if (! pch_swap ())
			      fatal ("lost hunk on alloc error!");
			    if (where)
			      {
				apply_anyway = 1;
				fuzz--; /* Undo `++fuzz' below.  */
				where = 0;
			      }
			  }
		    }
		} while (!skip_rest_of_patch && !where
			 && ++fuzz <= mymaxfuzz);

		if (skip_rest_of_patch) {		/* just got decided */
		  if (outstate.ofp && ! outfile)
		    {
		      fclose (outstate.ofp);
		      outstate.ofp = 0;
		    }
		}
	    }

	    newwhere = pch_newfirst() + last_offset;
	    if (skip_rest_of_patch) {
		abort_hunk();
		failed++;
		if (verbosity == VERBOSE)
		    say ("Hunk #%d ignored at %ld.\n", hunk, newwhere);
	    }
	    else if (!where
		     || (where == 1 && pch_says_nonexistent (reverse)
			 && instat.st_size)) {
		if (where)
		  say ("Patch attempted to create file `%s', which already exists.\n", inname);
		abort_hunk();
		failed++;
		if (verbosity != SILENT)
		    say ("Hunk #%d FAILED at %ld.\n", hunk, newwhere);
	    }
	    else if (! apply_hunk (&outstate, where)) {
		abort_hunk ();
		failed++;
		if (verbosity != SILENT)
		    say ("Hunk #%d FAILED at %ld.\n", hunk, newwhere);
	    } else {
		if (verbosity == VERBOSE
		    || (verbosity != SILENT && (fuzz || last_offset))) {
		    say ("Hunk #%d succeeded at %ld", hunk, newwhere);
		    if (fuzz)
			say (" with fuzz %ld", fuzz);
		    if (last_offset)
			say (" (offset %ld line%s)",
			    last_offset, last_offset==1?"":"s");
		    say (".\n");
		}
	    }
	}

	if (got_hunk < 0  &&  using_plan_a) {
	    if (outfile)
	      fatal ("out of memory using Plan A");
	    say ("\n\nRan out of memory using Plan A -- trying again...\n\n");
	    if (outstate.ofp)
	      {
		fclose (outstate.ofp);
		outstate.ofp = 0;
	      }
	    fclose (rejfp);
	    continue;
	}

	/* finish spewing out the new file */
	if (!skip_rest_of_patch)
	  {
	    assert (hunk);
	    if (! spew_output (&outstate))
	      {
		say ("Skipping patch.\n");
		skip_rest_of_patch = TRUE;
	      }
	  }
      }

      /* and put the output where desired */
      ignore_signals ();
      if (! skip_rest_of_patch && ! outfile) {
	  if (outstate.zero_output
	      && (remove_empty_files
		  || (pch_says_nonexistent (reverse ^ 1) == 2
		      && ! posixly_correct)))
	    {
	      if (verbosity == VERBOSE)
		say ("Removing file `%s'%s.\n", outname,
		     dry_run ? " and any empty ancestor directories" : "");
	      if (! dry_run)
		{
		  move_file ((char *) 0, outname, (mode_t) 0,
			     (make_backups
			      || (backup_if_mismatch && (mismatch | failed))));
		  removedirs (outname);
		}
	    }
	  else
	    {
	      if (! outstate.zero_output
		  && pch_says_nonexistent (reverse ^ 1))
		{
		  mismatch = 1;
		  if (verbosity != SILENT)
		    say ("File `%s' is not empty after patch, as expected.\n",
			 outname);
		}

	      if (! dry_run)
		{
		  time_t t;

		  move_file (TMPOUTNAME, outname, instat.st_mode,
			     (make_backups
			      || (backup_if_mismatch && (mismatch | failed))));

		  if ((set_time | set_utc)
		      && (t = pch_timestamp (reverse ^ 1)) != (time_t) -1)
		    {
		      struct utimbuf utimbuf;
		      utimbuf.actime = utimbuf.modtime = t;

		      if (! force && ! inerrno
			  && ! pch_says_nonexistent (reverse)
			  && (t = pch_timestamp (reverse)) != (time_t) -1
			  && t != instat.st_mtime)
			say ("not setting time of file `%s' (time mismatch)\n",
			     outname);
		      else if (! force && (mismatch | failed))
			say ("not setting time of file `%s' (contents mismatch)\n",
			     outname);
		      else if (utime (outname, &utimbuf) != 0)
			pfatal ("can't set timestamp on file `%s'", outname);
		    }

		  if (! inerrno && chmod (outname, instat.st_mode) != 0)
		    pfatal ("can't set permissions on file `%s'", outname);
		}
	    }
      }
      if (diff_type != ED_DIFF) {
	if (fclose (rejfp) != 0)
	    write_fatal ();
	if (failed) {
	    somefailed = TRUE;
	    say ("%d out of %d hunk%s %s", failed, hunk, "s" + (hunk == 1),
		 skip_rest_of_patch ? "ignored" : "FAILED");
	    if (outname) {
		char *rej = rejname;
		if (!rejname) {
		    rej = xmalloc (strlen (outname) + 5);
		    strcpy (rej, outname);
		    addext (rej, ".rej", '#');
		}
		say (" -- saving rejects to %s", rej);
		if (! dry_run)
		  {
		    move_file (TMPREJNAME, rej, instat.st_mode, FALSE);
		    if (! inerrno
			&& (chmod (rej, (instat.st_mode
					 & ~(S_IXUSR|S_IXGRP|S_IXOTH)))
			    != 0))
		      pfatal ("can't set permissions on file `%s'", rej);
		  }
		if (!rejname)
		    free (rej);
	    }
	    say ("\n");
	}
      }
      set_signals (1);
    }
    if (outstate.ofp && (ferror (outstate.ofp) || fclose (outstate.ofp) != 0))
      write_fatal ();
    cleanup ();
    if (somefailed)
      exit (1);
    return 0;
}

/* Prepare to find the next patch to do in the patch file. */

static void
reinitialize_almost_everything()
{
    re_patch();
    re_input();

    input_lines = 0;
    last_frozen_line = 0;

    if (inname) {
	free (inname);
	inname = 0;
    }

    last_offset = 0;

    diff_type = NO_DIFF;

    if (revision) {
	free(revision);
	revision = 0;
    }

    reverse = reverse_flag_specified;
    skip_rest_of_patch = FALSE;
}

static char const shortopts[] = "bB:cd:D:eEfF:g:i:lnNo:p:r:RstTuvV:x:Y:z:Z";
static struct option const longopts[] =
{
  {"backup", no_argument, NULL, 'b'},
  {"prefix", required_argument, NULL, 'B'},
  {"context", no_argument, NULL, 'c'},
  {"directory", required_argument, NULL, 'd'},
  {"ifdef", required_argument, NULL, 'D'},
  {"ed", no_argument, NULL, 'e'},
  {"remove-empty-files", no_argument, NULL, 'E'},
  {"force", no_argument, NULL, 'f'},
  {"fuzz", required_argument, NULL, 'F'},
  {"get", no_argument, NULL, 'g'},
  {"input", required_argument, NULL, 'i'},
  {"ignore-whitespace", no_argument, NULL, 'l'},
  {"normal", no_argument, NULL, 'n'},
  {"forward", no_argument, NULL, 'N'},
  {"output", required_argument, NULL, 'o'},
  {"strip", required_argument, NULL, 'p'},
  {"reject-file", required_argument, NULL, 'r'},
  {"reverse", no_argument, NULL, 'R'},
  {"quiet", no_argument, NULL, 's'},
  {"silent", no_argument, NULL, 's'},
  {"batch", no_argument, NULL, 't'},
  {"set-time", no_argument, NULL, 'T'},
  {"unified", no_argument, NULL, 'u'},
  {"version", no_argument, NULL, 'v'},
  {"version-control", required_argument, NULL, 'V'},
  {"debug", required_argument, NULL, 'x'},
  {"basename-prefix", required_argument, NULL, 'Y'},
  {"suffix", required_argument, NULL, 'z'},
  {"set-utc", no_argument, NULL, 'Z'},
  {"dry-run", no_argument, NULL, 129},
  {"verbose", no_argument, NULL, 130},
  {"binary", no_argument, NULL, 131},
  {"help", no_argument, NULL, 132},
  {"backup-if-mismatch", no_argument, NULL, 133},
  {"no-backup-if-mismatch", no_argument, NULL, 134},
  {NULL, no_argument, NULL, 0}
};

static char const *const option_help[] =
{
"Input options:",
"",
"  -p NUM  --strip=NUM  Strip NUM leading components from file names.",
"  -F LINES  --fuzz LINES  Set the fuzz factor to LINES for inexact matching.",
"  -l  --ignore-whitespace  Ignore white space changes between patch and input.",
"",
"  -c  --context  Interpret the patch as a context difference.",
"  -e  --ed  Interpret the patch as an ed script.",
"  -n  --normal  Interpret the patch as a normal difference.",
"  -u  --unified  Interpret the patch as a unified difference.",
"",
"  -N  --forward  Ignore patches that appear to be reversed or already applied.",
"  -R  --reverse  Assume patches were created with old and new files swapped.",
"",
"  -i PATCHFILE  --input=PATCHFILE  Read patch from PATCHFILE instead of stdin.",
"",
"Output options:",
"",
"  -o FILE  --output=FILE  Output patched files to FILE.",
"  -r FILE  --reject-file=FILE  Output rejects to FILE.",
"",
"  -D NAME  --ifdef=NAME  Make merged if-then-else output using NAME.",
"  -E  --remove-empty-files  Remove output files that are empty after patching.",
"",
"  -Z  --set-utc  Set times of patched files, assuming diff uses UTC (GMT).",
"  -T  --set-time  Likewise, assuming local time.",
"",
"Backup and version control options:",
"",
"  -b  --backup  Back up the original contents of each file.",
"  --backup-if-mismatch  Back up if the patch does not match exactly.",
"  --no-backup-if-mismatch  Back up mismatches only if otherwise requested.",
"",
"  -V STYLE  --version-control=STYLE  Use STYLE version control.",
"	STYLE is either 'simple', 'numbered', or 'existing'.",
"  -B PREFIX  --prefix=PREFIX  Prepend PREFIX to backup file names.",
"  -Y PREFIX  --basename-prefix=PREFIX  Prepend PREFIX to backup file basenames.",
"  -z SUFFIX  --suffix=SUFFIX  Append SUFFIX to backup file names.",
"",
"  -g NUM  --get=NUM  Get files from RCS or SCCS if positive; ask if negative.",
"",
"Miscellaneous options:",
"",
"  -t  --batch  Ask no questions; skip bad-Prereq patches; assume reversed.",
"  -f  --force  Like -t, but ignore bad-Prereq patches, and assume unreversed.",
"  -s  --quiet  --silent  Work silently unless an error occurs.",
"  --verbose  Output extra information about the work being done.",
"  --dry-run  Do not actually change any files; just print what would happen.",
"",
"  -d DIR  --directory=DIR  Change the working directory to DIR first.",
#if HAVE_SETMODE
"  --binary  Read and write data in binary mode.",
#else
"  --binary  Read and write data in binary mode (no effect on this platform).",
#endif
"",
"  -v  --version  Output version info.",
"  --help  Output this help.",
"",
"Report bugs to <bug-gnu-utils@prep.ai.mit.edu>.",
0
};

static void
usage (stream, status)
     FILE *stream;
     int status;
{
  char const * const *p;

  if (status != 0)
    {
      fprintf (stream, "%s: Try `%s --help' for more information.\n",
	       program_name, Argv[0]);
    }
  else
    {
      fprintf (stream, "Usage: %s [OPTION]... [ORIGFILE [PATCHFILE]]\n\n",
	       Argv[0]);
      for (p = option_help;  *p;  p++)
	fprintf (stream, "%s\n", *p);
    }

  exit (status);
}

/* Process switches and filenames.  */

static void
get_some_switches()
{
    register int optc;

    if (rejname)
	free (rejname);
    rejname = 0;
    if (optind == Argc)
	return;
    while ((optc = getopt_long (Argc, Argv, shortopts, longopts, (int *) 0))
	   != -1) {
	switch (optc) {
	    case 'b':
		make_backups = 1;
		 /* Special hack for backward compatibility with CVS 1.9.
		    If the last 4 args are `-b SUFFIX ORIGFILE PATCHFILE',
		    treat `-b' as if it were `-b -z'.  */
		if (Argc - optind == 3
		    && strcmp (Argv[optind - 1], "-b") == 0
		    && ! (Argv[optind + 0][0] == '-' && Argv[optind + 0][1])
		    && ! (Argv[optind + 1][0] == '-' && Argv[optind + 1][1])
		    && ! (Argv[optind + 2][0] == '-' && Argv[optind + 2][1]))
		  {
		    optarg = Argv[optind++];
		    if (verbosity != SILENT)
		      say ("warning: the `-b %s' option is obsolete; use `-b -z %s' instead\n",
			   optarg, optarg);
		    goto case_z;
		  }
		break;
	    case 'B':
		if (!*optarg)
		  fatal ("backup prefix is empty");
		origprae = savestr (optarg);
		break;
	    case 'c':
		diff_type = CONTEXT_DIFF;
		break;
	    case 'd':
		if (chdir(optarg) < 0)
		  pfatal ("can't change directory to `%s'", optarg);
		break;
	    case 'D':
		do_defines = savestr (optarg);
		break;
	    case 'e':
		diff_type = ED_DIFF;
		break;
	    case 'E':
		remove_empty_files = TRUE;
		break;
	    case 'f':
		force = TRUE;
		break;
	    case 'F':
		maxfuzz = numeric_string (optarg, 0, "fuzz factor");
		break;
	    case 'g':
		patch_get = numeric_string (optarg, 1, "get option value");
		break;
	    case 'i':
		patchname = savestr (optarg);
		break;
	    case 'l':
		canonicalize = TRUE;
		break;
	    case 'n':
		diff_type = NORMAL_DIFF;
		break;
	    case 'N':
		noreverse = TRUE;
		break;
	    case 'o':
		if (strcmp (optarg, "-") == 0)
		  fatal ("can't output patches to standard output");
		outfile = savestr (optarg);
		break;
	    case 'p':
		strippath = numeric_string (optarg, 0, "strip count");
		break;
	    case 'r':
		rejname = savestr (optarg);
		break;
	    case 'R':
		reverse = 1;
		reverse_flag_specified = 1;
		break;
	    case 's':
		verbosity = SILENT;
		break;
	    case 't':
		batch = TRUE;
		break;
	    case 'T':
		set_time = 1;
		break;
	    case 'u':
		diff_type = UNI_DIFF;
		break;
	    case 'v':
		version();
		exit (0);
		break;
	    case 'V':
		version_control = optarg;
		break;
#if DEBUGGING
	    case 'x':
		debug = numeric_string (optarg, 1, "debugging option");
		break;
#endif
	    case 'Y':
		if (!*optarg)
		  fatal ("backup basename prefix is empty");
		origbase = savestr (optarg);
		break;
	    case 'z':
	    case_z:
		if (!*optarg)
		  fatal ("backup suffix is empty");
		simple_backup_suffix = savestr (optarg);
		break;
	    case 'Z':
		set_utc = 1;
		break;
	    case 129:
		dry_run = TRUE;
		break;
	    case 130:
		verbosity = VERBOSE;
		break;
	    case 131:
#if HAVE_SETMODE
		binary_transput = O_BINARY;
#endif
		break;
	    case 132:
		usage (stdout, 0);
	    case 133:
		backup_if_mismatch = 1;
		break;
	    case 134:
		backup_if_mismatch = 0;
		break;
	    default:
		usage (stderr, 2);
	}
    }

    /* Process any filename args.  */
    if (optind < Argc)
      {
	inname = savestr (Argv[optind++]);
	invc = -1;
	if (optind < Argc)
	  {
	    patchname = savestr (Argv[optind++]);
	    if (optind < Argc)
	      {
		fprintf (stderr, "%s: extra operand `%s'\n",
			 program_name, Argv[optind]);
		usage (stderr, 2);
	      }
	  }
      }
}

/* Handle STRING (possibly negative if NEGATIVE_ALLOWED is nonzero)
   of type ARGTYPE_MSGID by converting it to an integer,
   returning the result.  */
static int
numeric_string (string, negative_allowed, argtype_msgid)
     char const *string;
     int negative_allowed;
     char const *argtype_msgid;
{
  int value = 0;
  char const *p = string;
  int sign = *p == '-' ? -1 : 1;

  p += *p == '-' || *p == '+';

  do
    {
      int v10 = value * 10;
      int digit = *p - '0';
      int signed_digit = sign * digit;
      int next_value = v10 + signed_digit;

      if (9 < (unsigned) digit)
	fatal ("%s `%s' is not a number", argtype_msgid, string);

      if (v10 / 10 != value || (next_value < v10) != (signed_digit < 0))
	fatal ("%s `%s' is too large", argtype_msgid, string);

      value = next_value;
    }
  while (*++p);

  if (value < 0 && ! negative_allowed)
    fatal ("%s `%s' is negative", argtype_msgid, string);

  return value;
}

/* Attempt to find the right place to apply this hunk of patch. */

static LINENUM
locate_hunk(fuzz)
LINENUM fuzz;
{
    register LINENUM first_guess = pch_first () + last_offset;
    register LINENUM offset;
    LINENUM pat_lines = pch_ptrn_lines();
    LINENUM prefix_context = pch_prefix_context ();
    LINENUM suffix_context = pch_suffix_context ();
    LINENUM context = (prefix_context < suffix_context
		       ? suffix_context : prefix_context);
    LINENUM prefix_fuzz = fuzz + prefix_context - context;
    LINENUM suffix_fuzz = fuzz + suffix_context - context;
    LINENUM max_where = input_lines - (pat_lines - suffix_fuzz) + 1;
    LINENUM min_where = last_frozen_line + 1 - (prefix_context - prefix_fuzz);
    LINENUM max_pos_offset = max_where - first_guess;
    LINENUM max_neg_offset = first_guess - min_where;
    LINENUM max_offset = (max_pos_offset < max_neg_offset
			  ? max_neg_offset : max_pos_offset);

    if (!pat_lines)			/* null range matches always */
	return first_guess;

    /* Do not try lines <= 0.  */
    if (first_guess <= max_neg_offset)
	max_neg_offset = first_guess - 1;

    if (prefix_fuzz < 0)
      {
	/* Can only match start of file.  */

	if (suffix_fuzz < 0)
	  /* Can only match entire file.  */
	  if (pat_lines != input_lines || prefix_context < last_frozen_line)
	    return 0;

	offset = 1 - first_guess;
	if (last_frozen_line <= prefix_context
	    && offset <= max_pos_offset
	    && patch_match (first_guess, offset, (LINENUM) 0, suffix_fuzz))
	  {
	    last_offset = offset;
	    return first_guess + offset;
	  }
	else
	  return 0;
      }

    if (suffix_fuzz < 0)
      {
	/* Can only match end of file.  */
	offset = first_guess - (input_lines - pat_lines + 1);
	if (offset <= max_neg_offset
	    && patch_match (first_guess, -offset, prefix_fuzz, (LINENUM) 0))
	  {
	    last_offset = - offset;
	    return first_guess - offset;
	  }
	else
	  return 0;
      }

    for (offset = 0;  offset <= max_offset;  offset++) {
	if (offset <= max_pos_offset
	    && patch_match (first_guess, offset, prefix_fuzz, suffix_fuzz)) {
	    if (debug & 1)
		say ("Offset changing from %ld to %ld\n", last_offset, offset);
	    last_offset = offset;
	    return first_guess+offset;
	}
	if (0 < offset && offset <= max_neg_offset
	    && patch_match (first_guess, -offset, prefix_fuzz, suffix_fuzz)) {
	    if (debug & 1)
		say ("Offset changing from %ld to %ld\n", last_offset, -offset);
	    last_offset = -offset;
	    return first_guess-offset;
	}
    }
    return 0;
}

/* We did not find the pattern, dump out the hunk so they can handle it. */

static void
abort_hunk()
{
    register LINENUM i;
    register LINENUM pat_end = pch_end ();
    /* add in last_offset to guess the same as the previous successful hunk */
    LINENUM oldfirst = pch_first() + last_offset;
    LINENUM newfirst = pch_newfirst() + last_offset;
    LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1;
    LINENUM newlast = newfirst + pch_repl_lines() - 1;
    char const *stars =
      (int) NEW_CONTEXT_DIFF <= (int) diff_type ? " ****" : "";
    char const *minuses =
      (int) NEW_CONTEXT_DIFF <= (int) diff_type ? " ----" : " -----";

    fprintf(rejfp, "***************\n");
    for (i=0; i<=pat_end; i++) {
	switch (pch_char(i)) {
	case '*':
	    if (oldlast < oldfirst)
		fprintf(rejfp, "*** 0%s\n", stars);
	    else if (oldlast == oldfirst)
		fprintf(rejfp, "*** %ld%s\n", oldfirst, stars);
	    else
		fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst, oldlast, stars);
	    break;
	case '=':
	    if (newlast < newfirst)
		fprintf(rejfp, "--- 0%s\n", minuses);
	    else if (newlast == newfirst)
		fprintf(rejfp, "--- %ld%s\n", newfirst, minuses);
	    else
		fprintf(rejfp, "--- %ld,%ld%s\n", newfirst, newlast, minuses);
	    break;
	case ' ': case '-': case '+': case '!':
	    fprintf (rejfp, "%c ", pch_char (i));
	    /* fall into */
	case '\n':
	    pch_write_line (i, rejfp);
	    break;
	default:
	    fatal ("fatal internal error in abort_hunk");
	}
	if (ferror (rejfp))
	  write_fatal ();
    }
}

/* We found where to apply it (we hope), so do it. */

static bool
apply_hunk (outstate, where)
     struct outstate *outstate;
     LINENUM where;
{
    register LINENUM old = 1;
    register LINENUM lastline = pch_ptrn_lines ();
    register LINENUM new = lastline+1;
    register enum {OUTSIDE, IN_IFNDEF, IN_IFDEF, IN_ELSE} def_state = OUTSIDE;
    register char const *R_do_defines = do_defines;
    register LINENUM pat_end = pch_end ();
    register FILE *fp = outstate->ofp;

    where--;
    while (pch_char(new) == '=' || pch_char(new) == '\n')
	new++;

    while (old <= lastline) {
	if (pch_char(old) == '-') {
	    assert (outstate->after_newline);
	    if (! copy_till (outstate, where + old - 1))
		return FALSE;
	    if (R_do_defines) {
		if (def_state == OUTSIDE) {
		    fprintf (fp, outstate->after_newline + if_defined,
			     R_do_defines);
		    def_state = IN_IFNDEF;
		}
		else if (def_state == IN_IFDEF) {
		    fprintf (fp, outstate->after_newline + else_defined);
		    def_state = IN_ELSE;
		}
		if (ferror (fp))
		  write_fatal ();
		outstate->after_newline = pch_write_line (old, fp);
		outstate->zero_output = 0;
	    }
	    last_frozen_line++;
	    old++;
	}
	else if (new > pat_end) {
	    break;
	}
	else if (pch_char(new) == '+') {
	    if (! copy_till (outstate, where + old - 1))
		return FALSE;
	    if (R_do_defines) {
		if (def_state == IN_IFNDEF) {
		    fprintf (fp, outstate->after_newline + else_defined);
		    def_state = IN_ELSE;
		}
		else if (def_state == OUTSIDE) {
		    fprintf (fp, outstate->after_newline + if_defined,
			     R_do_defines);
		    def_state = IN_IFDEF;
		}
		if (ferror (fp))
		  write_fatal ();
	    }
	    outstate->after_newline = pch_write_line (new, fp);
	    outstate->zero_output = 0;
	    new++;
	}
	else if (pch_char(new) != pch_char(old)) {
	    if (debug & 1)
	      say ("oldchar = '%c', newchar = '%c'\n",
		   pch_char (old), pch_char (new));
	    fatal ("Out-of-sync patch, lines %ld,%ld -- mangled text or line numbers, maybe?",
		pch_hunk_beg() + old,
		pch_hunk_beg() + new);
	}
	else if (pch_char(new) == '!') {
	    assert (outstate->after_newline);
	    if (! copy_till (outstate, where + old - 1))
		return FALSE;
	    assert (outstate->after_newline);
	    if (R_do_defines) {
	       fprintf (fp, not_defined, R_do_defines);
	       if (ferror (fp))
		write_fatal ();
	       def_state = IN_IFNDEF;
	    }

	    do
	      {
		if (R_do_defines) {
		    outstate->after_newline = pch_write_line (old, fp);
		}
		last_frozen_line++;
		old++;
	      }
	    while (pch_char (old) == '!');

	    if (R_do_defines) {
		fprintf (fp, outstate->after_newline + else_defined);
		if (ferror (fp))
		  write_fatal ();
		def_state = IN_ELSE;
	    }

	    do
	      {
		outstate->after_newline = pch_write_line (new, fp);
		new++;
	      }
	    while (pch_char (new) == '!');
	    outstate->zero_output = 0;
	}
	else {
	    assert(pch_char(new) == ' ');
	    old++;
	    new++;
	    if (R_do_defines && def_state != OUTSIDE) {
		fprintf (fp, outstate->after_newline + end_defined,
			 R_do_defines);
		if (ferror (fp))
		  write_fatal ();
		outstate->after_newline = 1;
		def_state = OUTSIDE;
	    }
	}
    }
    if (new <= pat_end && pch_char(new) == '+') {
	if (! copy_till (outstate, where + old - 1))
	    return FALSE;
	if (R_do_defines) {
	    if (def_state == OUTSIDE) {
		fprintf (fp, outstate->after_newline + if_defined,
			 R_do_defines);
		def_state = IN_IFDEF;
	    }
	    else if (def_state == IN_IFNDEF) {
		fprintf (fp, outstate->after_newline + else_defined);
		def_state = IN_ELSE;
	    }
	    if (ferror (fp))
	      write_fatal ();
	    outstate->zero_output = 0;
	}

	do
	  {
	    if (! outstate->after_newline  &&  putc ('\n', fp) == EOF)
	      write_fatal ();
	    outstate->after_newline = pch_write_line (new, fp);
	    outstate->zero_output = 0;
	    new++;
	  }
	while (new <= pat_end && pch_char (new) == '+');
    }
    if (R_do_defines && def_state != OUTSIDE) {
	fprintf (fp, outstate->after_newline + end_defined, R_do_defines);
	if (ferror (fp))
	  write_fatal ();
	outstate->after_newline = 1;
    }
    return TRUE;
}

/* Create an output file.  */

static FILE *
create_output_file (name)
     char const *name;
{
  int fd = create_file (name, O_WRONLY | binary_transput, instat.st_mode);
  FILE *f = fdopen (fd, binary_transput ? "wb" : "w");
  if (! f)
    pfatal ("can't create `%s'", name);
  return f;
}

/* Open the new file. */

static void
init_output (name, outstate)
     char const *name;
     struct outstate *outstate;
{
  outstate->ofp = name ? create_output_file (name) : (FILE *) 0;
  outstate->after_newline = 1;
  outstate->zero_output = 1;
}

/* Open a file to put hunks we can't locate. */

static void
init_reject(name)
     char const *name;
{
  rejfp = create_output_file (name);
}

/* Copy input file to output, up to wherever hunk is to be applied. */

static bool
copy_till (outstate, lastline)
     register struct outstate *outstate;
     register LINENUM lastline;
{
    register LINENUM R_last_frozen_line = last_frozen_line;
    register FILE *fp = outstate->ofp;
    register char const *s;
    size_t size;

    if (R_last_frozen_line > lastline)
      {
	say ("misordered hunks! output would be garbled\n");
	return FALSE;
      }
    while (R_last_frozen_line < lastline)
      {
	s = ifetch (++R_last_frozen_line, 0, &size);
	if (size)
	  {
	    if ((! outstate->after_newline  &&  putc ('\n', fp) == EOF)
		|| ! fwrite (s, sizeof *s, size, fp))
	      write_fatal ();
	    outstate->after_newline = s[size - 1] == '\n';
	    outstate->zero_output = 0;
	  }
      }
    last_frozen_line = R_last_frozen_line;
    return TRUE;
}

/* Finish copying the input file to the output file. */

static bool
spew_output (outstate)
     struct outstate *outstate;
{
    if (debug & 256)
      say ("il=%ld lfl=%ld\n", input_lines, last_frozen_line);

    if (last_frozen_line < input_lines)
      if (! copy_till (outstate, input_lines))
	return FALSE;

    if (outstate->ofp && ! outfile)
      {
	if (fclose (outstate->ofp) != 0)
	  write_fatal ();
	outstate->ofp = 0;
      }

    return TRUE;
}

/* Does the patch pattern match at line base+offset? */

static bool
patch_match (base, offset, prefix_fuzz, suffix_fuzz)
LINENUM base;
LINENUM offset;
LINENUM prefix_fuzz;
LINENUM suffix_fuzz;
{
    register LINENUM pline = 1 + prefix_fuzz;
    register LINENUM iline;
    register LINENUM pat_lines = pch_ptrn_lines () - suffix_fuzz;
    size_t size;
    register char const *p;

    for (iline=base+offset+prefix_fuzz; pline <= pat_lines; pline++,iline++) {
	p = ifetch (iline, offset >= 0, &size);
	if (canonicalize) {
	    if (!similar(p, size,
			 pfetch(pline),
			 pch_line_len(pline) ))
		return FALSE;
	}
	else if (size != pch_line_len (pline)
		 || memcmp (p, pfetch (pline), size) != 0)
	    return FALSE;
    }
    return TRUE;
}

/* Do two lines match with canonicalized white space? */

static bool
similar (a, alen, b, blen)
     register char const *a;
     register size_t alen;
     register char const *b;
     register size_t blen;
{
  /* Ignore presence or absence of trailing newlines.  */
  alen  -=  alen && a[alen - 1] == '\n';
  blen  -=  blen && b[blen - 1] == '\n';

  for (;;)
    {
      if (!blen || (*b == ' ' || *b == '\t'))
	{
	  while (blen && (*b == ' ' || *b == '\t'))
	    b++, blen--;
	  if (alen)
	    {
	      if (!(*a == ' ' || *a == '\t'))
		return FALSE;
	      do a++, alen--;
	      while (alen && (*a == ' ' || *a == '\t'));
	    }
	  if (!alen || !blen)
	    return alen == blen;
	}
      else if (!alen || *a++ != *b++)
	return FALSE;
      else
	alen--, blen--;
    }
}

/* Make a temporary file.  */

#if HAVE_MKTEMP
char *mktemp PARAMS ((char *));
#endif

#ifndef TMPDIR
#define TMPDIR "/tmp"
#endif

static char const *
make_temp (letter)
     int letter;
{
  char *r;
#if HAVE_MKTEMP
  char const *tmpdir = getenv ("TMPDIR");	/* Unix tradition */
  if (!tmpdir) tmpdir = getenv ("TMP");		/* DOS tradition */
  if (!tmpdir) tmpdir = getenv ("TEMP");	/* another DOS tradition */
  if (!tmpdir) tmpdir = TMPDIR;
  r = xmalloc (strlen (tmpdir) + 10);
  sprintf (r, "%s/p%cXXXXXX", tmpdir, letter);
  mktemp (r);
  if (!*r)
    pfatal ("mktemp");
#else
  r = xmalloc (L_tmpnam);
  if (! (tmpnam (r) == r && *r))
    pfatal ("tmpnam");
#endif
  return r;
}

/* Fatal exit with cleanup. */

void
fatal_exit (sig)
     int sig;
{
  cleanup ();

  if (sig)
    exit_with_signal (sig);

  exit (2);
}

static void
cleanup ()
{
  unlink (TMPINNAME);
  unlink (TMPOUTNAME);
  unlink (TMPPATNAME);
  unlink (TMPREJNAME);
}
OpenPOWER on IntegriCloud