ls-files.c

   1 /*
   2  * This merges the file listing in the directory cache index
   3  * with the actual working directory list, and shows different
   4  * combinations of the two.
   5  *
   6  * Copyright (C) Linus Torvalds, 2005
   7  */
   8 #include <dirent.h>
   9 #include <fnmatch.h>
  10
  11 #include "cache.h"
  12 #include "quote.h"
  13
  14 static int show_deleted = 0;
  15 static int show_cached = 0;
  16 static int show_others = 0;
  17 static int show_ignored = 0;
  18 static int show_stage = 0;
  19 static int show_unmerged = 0;
  20 static int show_modified = 0;
  21 static int show_killed = 0;
  22 static int show_other_directories = 0;
  23 static int show_valid_bit = 0;
  24 static int line_terminator = '\n';
  25
  26 static int prefix_len = 0, prefix_offset = 0;
  27 static const char *prefix = NULL;
  28 static const char **pathspec = NULL;
  29 static int error_unmatch = 0;
  30 static char *ps_matched = NULL;
  31
  32 static const char *tag_cached = "";
  33 static const char *tag_unmerged = "";
  34 static const char *tag_removed = "";
  35 static const char *tag_other = "";
  36 static const char *tag_killed = "";
  37 static const char *tag_modified = "";
  38
  39 static const char *exclude_per_dir = NULL;
  40
  41 /* We maintain three exclude pattern lists:
  42  * EXC_CMDL lists patterns explicitly given on the command line.
  43  * EXC_DIRS lists patterns obtained from per-directory ignore files.
  44  * EXC_FILE lists patterns from fallback ignore files.
  45  */
  46 #define EXC_CMDL 0
  47 #define EXC_DIRS 1
  48 #define EXC_FILE 2
  49 static struct exclude_list {
  50         int nr;
  51         int alloc;
  52         struct exclude {
  53                 const char *pattern;
  54                 const char *base;
  55                 int baselen;
  56         } **excludes;
  57 } exclude_list[3];
  58
  59 static void add_exclude(const char *string, const char *base,
  60                         int baselen, struct exclude_list *which)
  61 {
  62         struct exclude *x = xmalloc(sizeof (*x));
  63
  64         x->pattern = string;
  65         x->base = base;
  66         x->baselen = baselen;
  67         if (which->nr == which->alloc) {
  68                 which->alloc = alloc_nr(which->alloc);
  69                 which->excludes = realloc(which->excludes,
  70                                           which->alloc * sizeof(x));
  71         }
  72         which->excludes[which->nr++] = x;
  73 }
  74
  75 static int add_excludes_from_file_1(const char *fname,
  76                                     const char *base,
  77                                     int baselen,
  78                                     struct exclude_list *which)
  79 {
  80         int fd, i;
  81         long size;
  82         char *buf, *entry;
  83
  84         fd = open(fname, O_RDONLY);
  85         if (fd < 0)
  86                 goto err;
  87         size = lseek(fd, 0, SEEK_END);
  88         if (size < 0)
  89                 goto err;
  90         lseek(fd, 0, SEEK_SET);
  91         if (size == 0) {
  92                 close(fd);
  93                 return 0;
  94         }
  95         buf = xmalloc(size+1);
  96         if (read(fd, buf, size) != size)
  97                 goto err;
  98         close(fd);
  99
 100         buf[size++] = '\n';
 101         entry = buf;
 102         for (i = 0; i < size; i++) {
 103                 if (buf[i] == '\n') {
 104                         if (entry != buf + i && entry[0] != '#') {
 105                                 buf[i - (i && buf[i-1] == '\r')] = 0;
 106                                 add_exclude(entry, base, baselen, which);
 107                         }
 108                         entry = buf + i + 1;
 109                 }
 110         }
 111         return 0;
 112
 113  err:
 114         if (0 <= fd)
 115                 close(fd);
 116         return -1;
 117 }
 118
 119 static void add_excludes_from_file(const char *fname)
 120 {
 121         if (add_excludes_from_file_1(fname, "", 0,
 122                                      &exclude_list[EXC_FILE]) < 0)
 123                 die("cannot use %s as an exclude file", fname);
 124 }
 125
 126 static int push_exclude_per_directory(const char *base, int baselen)
 127 {
 128         char exclude_file[PATH_MAX];
 129         struct exclude_list *el = &exclude_list[EXC_DIRS];
 130         int current_nr = el->nr;
 131
 132         if (exclude_per_dir) {
 133                 memcpy(exclude_file, base, baselen);
 134                 strcpy(exclude_file + baselen, exclude_per_dir);
 135                 add_excludes_from_file_1(exclude_file, base, baselen, el);
 136         }
 137         return current_nr;
 138 }
 139
 140 static void pop_exclude_per_directory(int stk)
 141 {
 142         struct exclude_list *el = &exclude_list[EXC_DIRS];
 143
 144         while (stk < el->nr)
 145                 free(el->excludes[--el->nr]);
 146 }
 147
 148 /* Scan the list and let the last match determines the fate.
 149  * Return 1 for exclude, 0 for include and -1 for undecided.
 150  */
 151 static int excluded_1(const char *pathname,
 152                       int pathlen,
 153                       struct exclude_list *el)
 154 {
 155         int i;
 156
 157         if (el->nr) {
 158                 for (i = el->nr - 1; 0 <= i; i--) {
 159                         struct exclude *x = el->excludes[i];
 160                         const char *exclude = x->pattern;
 161                         int to_exclude = 1;
 162
 163                         if (*exclude == '!') {
 164                                 to_exclude = 0;
 165                                 exclude++;
 166                         }
 167
 168                         if (!strchr(exclude, '/')) {
 169                                 /* match basename */
 170                                 const char *basename = strrchr(pathname, '/');
 171                                 basename = (basename) ? basename+1 : pathname;
 172                                 if (fnmatch(exclude, basename, 0) == 0)
 173                                         return to_exclude;
 174                         }
 175                         else {
 176                                 /* match with FNM_PATHNAME:
 177                                  * exclude has base (baselen long) implicitly
 178                                  * in front of it.
 179                                  */
 180                                 int baselen = x->baselen;
 181                                 if (*exclude == '/')
 182                                         exclude++;
 183
 184                                 if (pathlen < baselen ||
 185                                     (baselen && pathname[baselen-1] != '/') ||
 186                                     strncmp(pathname, x->base, baselen))
 187                                     continue;
 188
 189                                 if (fnmatch(exclude, pathname+baselen,
 190                                             FNM_PATHNAME) == 0)
 191                                         return to_exclude;
 192                         }
 193                 }
 194         }
 195         return -1; /* undecided */
 196 }
 197
 198 static int excluded(const char *pathname)
 199 {
 200         int pathlen = strlen(pathname);
 201         int st;
 202
 203         for (st = EXC_CMDL; st <= EXC_FILE; st++) {
 204                 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
 205                 case 0:
 206                         return 0;
 207                 case 1:
 208                         return 1;
 209                 }
 210         }
 211         return 0;
 212 }
 213
 214 struct nond_on_fs {
 215         int len;
 216         char name[FLEX_ARRAY]; /* more */
 217 };
 218
 219 static struct nond_on_fs **dir;
 220 static int nr_dir;
 221 static int dir_alloc;
 222
 223 static void add_name(const char *pathname, int len)
 224 {
 225         struct nond_on_fs *ent;
 226
 227         if (cache_name_pos(pathname, len) >= 0)
 228                 return;
 229
 230         if (nr_dir == dir_alloc) {
 231                 dir_alloc = alloc_nr(dir_alloc);
 232                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
 233         }
 234         ent = xmalloc(sizeof(*ent) + len + 1);
 235         ent->len = len;
 236         memcpy(ent->name, pathname, len);
 237         ent->name[len] = 0;
 238         dir[nr_dir++] = ent;
 239 }
 240
 241 static int dir_exists(const char *dirname, int len)
 242 {
 243         int pos = cache_name_pos(dirname, len);
 244         if (pos >= 0)
 245                 return 1;
 246         pos = -pos-1;
 247         if (pos >= active_nr) /* can't */
 248                 return 0;
 249         return !strncmp(active_cache[pos]->name, dirname, len);
 250 }
 251
 252 /*
 253  * Read a directory tree. We currently ignore anything but
 254  * directories, regular files and symlinks. That's because git
 255  * doesn't handle them at all yet. Maybe that will change some
 256  * day.
 257  *
 258  * Also, we ignore the name ".git" (even if it is not a directory).
 259  * That likely will not change.
 260  */
 261 static void read_directory(const char *path, const char *base, int baselen)
 262 {
 263         DIR *dir = opendir(path);
 264
 265         if (dir) {
 266                 int exclude_stk;
 267                 struct dirent *de;
 268                 char fullname[MAXPATHLEN + 1];
 269                 memcpy(fullname, base, baselen);
 270
 271                 exclude_stk = push_exclude_per_directory(base, baselen);
 272
 273                 while ((de = readdir(dir)) != NULL) {
 274                         int len;
 275
 276                         if ((de->d_name[0] == '.') &&
 277                             (de->d_name[1] == 0 ||
 278                              !strcmp(de->d_name + 1, ".") ||
 279                              !strcmp(de->d_name + 1, "git")))
 280                                 continue;
 281                         len = strlen(de->d_name);
 282                         memcpy(fullname + baselen, de->d_name, len+1);
 283                         if (excluded(fullname) != show_ignored) {
 284                                 if (!show_ignored || DTYPE(de) != DT_DIR) {
 285                                         continue;
 286                                 }
 287                         }
 288
 289                         switch (DTYPE(de)) {
 290                         struct stat st;
 291                         default:
 292                                 continue;
 293                         case DT_UNKNOWN:
 294                                 if (lstat(fullname, &st))
 295                                         continue;
 296                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 297                                         break;
 298                                 if (!S_ISDIR(st.st_mode))
 299                                         continue;
 300                                 /* fallthrough */
 301                         case DT_DIR:
 302                                 memcpy(fullname + baselen + len, "/", 2);
 303                                 len++;
 304                                 if (show_other_directories &&
 305                                     !dir_exists(fullname, baselen + len))
 306                                         break;
 307                                 read_directory(fullname, fullname,
 308                                                baselen + len);
 309                                 continue;
 310                         case DT_REG:
 311                         case DT_LNK:
 312                                 break;
 313                         }
 314                         add_name(fullname, baselen + len);
 315                 }
 316                 closedir(dir);
 317
 318                 pop_exclude_per_directory(exclude_stk);
 319         }
 320 }
 321
 322 static int cmp_name(const void *p1, const void *p2)
 323 {
 324         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
 325         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
 326
 327         return cache_name_compare(e1->name, e1->len,
 328                                   e2->name, e2->len);
 329 }
 330
 331 /*
 332  * Match a pathspec against a filename. The first "len" characters
 333  * are the common prefix
 334  */
 335 static int match(const char **spec, char *ps_matched,
 336                  const char *filename, int len)
 337 {
 338         const char *m;
 339
 340         while ((m = *spec++) != NULL) {
 341                 int matchlen = strlen(m + len);
 342
 343                 if (!matchlen)
 344                         goto matched;
 345                 if (!strncmp(m + len, filename + len, matchlen)) {
 346                         if (m[len + matchlen - 1] == '/')
 347                                 goto matched;
 348                         switch (filename[len + matchlen]) {
 349                         case '/': case '\0':
 350                                 goto matched;
 351                         }
 352                 }
 353                 if (!fnmatch(m + len, filename + len, 0))
 354                         goto matched;
 355                 if (ps_matched)
 356                         ps_matched++;
 357                 continue;
 358         matched:
 359                 if (ps_matched)
 360                         *ps_matched = 1;
 361                 return 1;
 362         }
 363         return 0;
 364 }
 365
 366 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
 367 {
 368         int len = prefix_len;
 369         int offset = prefix_offset;
 370
 371         if (len >= ent->len)
 372                 die("git-ls-files: internal error - directory entry not superset of prefix");
 373
 374         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
 375                 return;
 376
 377         fputs(tag, stdout);
 378         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
 379         putchar(line_terminator);
 380 }
 381
 382 static void show_other_files(void)
 383 {
 384         int i;
 385         for (i = 0; i < nr_dir; i++) {
 386                 /* We should not have a matching entry, but we
 387                  * may have an unmerged entry for this path.
 388                  */
 389                 struct nond_on_fs *ent = dir[i];
 390                 int pos = cache_name_pos(ent->name, ent->len);
 391                 struct cache_entry *ce;
 392                 if (0 <= pos)
 393                         die("bug in show-other-files");
 394                 pos = -pos - 1;
 395                 if (pos < active_nr) {
 396                         ce = active_cache[pos];
 397                         if (ce_namelen(ce) == ent->len &&
 398                             !memcmp(ce->name, ent->name, ent->len))
 399                                 continue; /* Yup, this one exists unmerged */
 400                 }
 401                 show_dir_entry(tag_other, ent);
 402         }
 403 }
 404
 405 static void show_killed_files(void)
 406 {
 407         int i;
 408         for (i = 0; i < nr_dir; i++) {
 409                 struct nond_on_fs *ent = dir[i];
 410                 char *cp, *sp;
 411                 int pos, len, killed = 0;
 412
 413                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 414                         sp = strchr(cp, '/');
 415                         if (!sp) {
 416                                 /* If ent->name is prefix of an entry in the
 417                                  * cache, it will be killed.
 418                                  */
 419                                 pos = cache_name_pos(ent->name, ent->len);
 420                                 if (0 <= pos)
 421                                         die("bug in show-killed-files");
 422                                 pos = -pos - 1;
 423                                 while (pos < active_nr &&
 424                                        ce_stage(active_cache[pos]))
 425                                         pos++; /* skip unmerged */
 426                                 if (active_nr <= pos)
 427                                         break;
 428                                 /* pos points at a name immediately after
 429                                  * ent->name in the cache.  Does it expect
 430                                  * ent->name to be a directory?
 431                                  */
 432                                 len = ce_namelen(active_cache[pos]);
 433                                 if ((ent->len < len) &&
 434                                     !strncmp(active_cache[pos]->name,
 435                                              ent->name, ent->len) &&
 436                                     active_cache[pos]->name[ent->len] == '/')
 437                                         killed = 1;
 438                                 break;
 439                         }
 440                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 441                                 /* If any of the leading directories in
 442                                  * ent->name is registered in the cache,
 443                                  * ent->name will be killed.
 444                                  */
 445                                 killed = 1;
 446                                 break;
 447                         }
 448                 }
 449                 if (killed)
 450                         show_dir_entry(tag_killed, dir[i]);
 451         }
 452 }
 453
 454 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 455 {
 456         int len = prefix_len;
 457         int offset = prefix_offset;
 458
 459         if (len >= ce_namelen(ce))
 460                 die("git-ls-files: internal error - cache entry not superset of prefix");
 461
 462         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
 463                 return;
 464
 465         if (tag && *tag && show_valid_bit &&
 466             (ce->ce_flags & htons(CE_VALID))) {
 467                 static char alttag[4];
 468                 memcpy(alttag, tag, 3);
 469                 if (isalpha(tag[0]))
 470                         alttag[0] = tolower(tag[0]);
 471                 else if (tag[0] == '?')
 472                         alttag[0] = '!';
 473                 else {
 474                         alttag[0] = 'v';
 475                         alttag[1] = tag[0];
 476                         alttag[2] = ' ';
 477                         alttag[3] = 0;
 478                 }
 479                 tag = alttag;
 480         }
 481
 482         if (!show_stage) {
 483                 fputs(tag, stdout);
 484                 write_name_quoted("", 0, ce->name + offset,
 485                                   line_terminator, stdout);
 486                 putchar(line_terminator);
 487         }
 488         else {
 489                 printf("%s%06o %s %d\t",
 490                        tag,
 491                        ntohl(ce->ce_mode),
 492                        sha1_to_hex(ce->sha1),
 493                        ce_stage(ce));
 494                 write_name_quoted("", 0, ce->name + offset,
 495                                   line_terminator, stdout);
 496                 putchar(line_terminator);
 497         }
 498 }
 499
 500 static void show_files(void)
 501 {
 502         int i;
 503
 504         /* For cached/deleted files we don't need to even do the readdir */
 505         if (show_others || show_killed) {
 506                 const char *path = ".", *base = "";
 507                 int baselen = prefix_len;
 508
 509                 if (baselen) {
 510                         path = base = prefix;
 511                         if (exclude_per_dir) {
 512                                 char *p, *pp = xmalloc(baselen+1);
 513                                 memcpy(pp, prefix, baselen+1);
 514                                 p = pp;
 515                                 while (1) {
 516                                         char save = *p;
 517                                         *p = 0;
 518                                         push_exclude_per_directory(pp, p-pp);
 519                                         *p++ = save;
 520                                         if (!save)
 521                                                 break;
 522                                         p = strchr(p, '/');
 523                                         if (p)
 524                                                 p++;
 525                                         else
 526                                                 p = pp + baselen;
 527                                 }
 528                                 free(pp);
 529                         }
 530                 }
 531                 read_directory(path, base, baselen);
 532                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
 533                 if (show_others)
 534                         show_other_files();
 535                 if (show_killed)
 536                         show_killed_files();
 537         }
 538         if (show_cached | show_stage) {
 539                 for (i = 0; i < active_nr; i++) {
 540                         struct cache_entry *ce = active_cache[i];
 541                         if (excluded(ce->name) != show_ignored)
 542                                 continue;
 543                         if (show_unmerged && !ce_stage(ce))
 544                                 continue;
 545                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 546                 }
 547         }
 548         if (show_deleted | show_modified) {
 549                 for (i = 0; i < active_nr; i++) {
 550                         struct cache_entry *ce = active_cache[i];
 551                         struct stat st;
 552                         int err;
 553                         if (excluded(ce->name) != show_ignored)
 554                                 continue;
 555                         err = lstat(ce->name, &st);
 556                         if (show_deleted && err)
 557                                 show_ce_entry(tag_removed, ce);
 558                         if (show_modified && ce_modified(ce, &st, 0))
 559                                 show_ce_entry(tag_modified, ce);
 560                 }
 561         }
 562 }
 563
 564 /*
 565  * Prune the index to only contain stuff starting with "prefix"
 566  */
 567 static void prune_cache(void)
 568 {
 569         int pos = cache_name_pos(prefix, prefix_len);
 570         unsigned int first, last;
 571
 572         if (pos < 0)
 573                 pos = -pos-1;
 574         active_cache += pos;
 575         active_nr -= pos;
 576         first = 0;
 577         last = active_nr;
 578         while (last > first) {
 579                 int next = (last + first) >> 1;
 580                 struct cache_entry *ce = active_cache[next];
 581                 if (!strncmp(ce->name, prefix, prefix_len)) {
 582                         first = next+1;
 583                         continue;
 584                 }
 585                 last = next;
 586         }
 587         active_nr = last;
 588 }
 589
 590 static void verify_pathspec(void)
 591 {
 592         const char **p, *n, *prev;
 593         char *real_prefix;
 594         unsigned long max;
 595
 596         prev = NULL;
 597         max = PATH_MAX;
 598         for (p = pathspec; (n = *p) != NULL; p++) {
 599                 int i, len = 0;
 600                 for (i = 0; i < max; i++) {
 601                         char c = n[i];
 602                         if (prev && prev[i] != c)
 603                                 break;
 604                         if (!c || c == '*' || c == '?')
 605                                 break;
 606                         if (c == '/')
 607                                 len = i+1;
 608                 }
 609                 prev = n;
 610                 if (len < max) {
 611                         max = len;
 612                         if (!max)
 613                                 break;
 614                 }
 615         }
 616
 617         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 618                 die("git-ls-files: cannot generate relative filenames containing '..'");
 619
 620         real_prefix = NULL;
 621         prefix_len = max;
 622         if (max) {
 623                 real_prefix = xmalloc(max + 1);
 624                 memcpy(real_prefix, prev, max);
 625                 real_prefix[max] = 0;
 626         }
 627         prefix = real_prefix;
 628 }
 629
 630 static const char ls_files_usage[] =
 631         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 632         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 633         "[ --exclude-per-directory=<filename> ] [--full-name] [--] [<file>]*";
 634
 635 int main(int argc, const char **argv)
 636 {
 637         int i;
 638         int exc_given = 0;
 639
 640         prefix = setup_git_directory();
 641         if (prefix)
 642                 prefix_offset = strlen(prefix);
 643         git_config(git_default_config);
 644
 645         for (i = 1; i < argc; i++) {
 646                 const char *arg = argv[i];
 647
 648                 if (!strcmp(arg, "--")) {
 649                         i++;
 650                         break;
 651                 }
 652                 if (!strcmp(arg, "-z")) {
 653                         line_terminator = 0;
 654                         continue;
 655                 }
 656                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 657                         tag_cached = "H ";
 658                         tag_unmerged = "M ";
 659                         tag_removed = "R ";
 660                         tag_modified = "C ";
 661                         tag_other = "? ";
 662                         tag_killed = "K ";
 663                         if (arg[1] == 'v')
 664                                 show_valid_bit = 1;
 665                         continue;
 666                 }
 667                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 668                         show_cached = 1;
 669                         continue;
 670                 }
 671                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 672                         show_deleted = 1;
 673                         continue;
 674                 }
 675                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 676                         show_modified = 1;
 677                         continue;
 678                 }
 679                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 680                         show_others = 1;
 681                         continue;
 682                 }
 683                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 684                         show_ignored = 1;
 685                         continue;
 686                 }
 687                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 688                         show_stage = 1;
 689                         continue;
 690                 }
 691                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 692                         show_killed = 1;
 693                         continue;
 694                 }
 695                 if (!strcmp(arg, "--directory")) {
 696                         show_other_directories = 1;
 697                         continue;
 698                 }
 699                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 700                         /* There's no point in showing unmerged unless
 701                          * you also show the stage information.
 702                          */
 703                         show_stage = 1;
 704                         show_unmerged = 1;
 705                         continue;
 706                 }
 707                 if (!strcmp(arg, "-x") && i+1 < argc) {
 708                         exc_given = 1;
 709                         add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
 710                         continue;
 711                 }
 712                 if (!strncmp(arg, "--exclude=", 10)) {
 713                         exc_given = 1;
 714                         add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
 715                         continue;
 716                 }
 717                 if (!strcmp(arg, "-X") && i+1 < argc) {
 718                         exc_given = 1;
 719                         add_excludes_from_file(argv[++i]);
 720                         continue;
 721                 }
 722                 if (!strncmp(arg, "--exclude-from=", 15)) {
 723                         exc_given = 1;
 724                         add_excludes_from_file(arg+15);
 725                         continue;
 726                 }
 727                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
 728                         exc_given = 1;
 729                         exclude_per_dir = arg + 24;
 730                         continue;
 731                 }
 732                 if (!strcmp(arg, "--full-name")) {
 733                         prefix_offset = 0;
 734                         continue;
 735                 }
 736                 if (!strcmp(arg, "--error-unmatch")) {
 737                         error_unmatch = 1;
 738                         continue;
 739                 }
 740                 if (*arg == '-')
 741                         usage(ls_files_usage);
 742                 break;
 743         }
 744
 745         pathspec = get_pathspec(prefix, argv + i);
 746
 747         /* Verify that the pathspec matches the prefix */
 748         if (pathspec)
 749                 verify_pathspec();
 750
 751         /* Treat unmatching pathspec elements as errors */
 752         if (pathspec && error_unmatch) {
 753                 int num;
 754                 for (num = 0; pathspec[num]; num++)
 755                         ;
 756                 ps_matched = xcalloc(1, num);
 757         }
 758
 759         if (show_ignored && !exc_given) {
 760                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 761                         argv[0]);
 762                 exit(1);
 763         }
 764
 765         /* With no flags, we default to showing the cached files */
 766         if (!(show_stage | show_deleted | show_others | show_unmerged |
 767               show_killed | show_modified))
 768                 show_cached = 1;
 769
 770         read_cache();
 771         if (prefix)
 772                 prune_cache();
 773         show_files();
 774
 775         if (ps_matched) {
 776                 /* We need to make sure all pathspec matched otherwise
 777                  * it is an error.
 778                  */
 779                 int num, errors = 0;
 780                 for (num = 0; pathspec[num]; num++) {
 781                         if (ps_matched[num])
 782                                 continue;
 783                         error("pathspec '%s' did not match any.",
 784                               pathspec[num] + prefix_offset);
 785                         errors++;
 786                 }
 787                 return errors ? 1 : 0;
 788         }
 789
 790         return 0;
 791 }