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 abbrev = 0;
  15 static int show_deleted = 0;
  16 static int show_cached = 0;
  17 static int show_others = 0;
  18 static int show_ignored = 0;
  19 static int show_stage = 0;
  20 static int show_unmerged = 0;
  21 static int show_modified = 0;
  22 static int show_killed = 0;
  23 static int show_other_directories = 0;
  24 static int show_valid_bit = 0;
  25 static int line_terminator = '\n';
  26
  27 static int prefix_len = 0, prefix_offset = 0;
  28 static const char *prefix = NULL;
  29 static const char **pathspec = NULL;
  30 static int error_unmatch = 0;
  31 static char *ps_matched = NULL;
  32
  33 static const char *tag_cached = "";
  34 static const char *tag_unmerged = "";
  35 static const char *tag_removed = "";
  36 static const char *tag_other = "";
  37 static const char *tag_killed = "";
  38 static const char *tag_modified = "";
  39
  40 static const char *exclude_per_dir = NULL;
  41
  42 /* We maintain three exclude pattern lists:
  43  * EXC_CMDL lists patterns explicitly given on the command line.
  44  * EXC_DIRS lists patterns obtained from per-directory ignore files.
  45  * EXC_FILE lists patterns from fallback ignore files.
  46  */
  47 #define EXC_CMDL 0
  48 #define EXC_DIRS 1
  49 #define EXC_FILE 2
  50 static struct exclude_list {
  51         int nr;
  52         int alloc;
  53         struct exclude {
  54                 const char *pattern;
  55                 const char *base;
  56                 int baselen;
  57         } **excludes;
  58 } exclude_list[3];
  59
  60 static void add_exclude(const char *string, const char *base,
  61                         int baselen, struct exclude_list *which)
  62 {
  63         struct exclude *x = xmalloc(sizeof (*x));
  64
  65         x->pattern = string;
  66         x->base = base;
  67         x->baselen = baselen;
  68         if (which->nr == which->alloc) {
  69                 which->alloc = alloc_nr(which->alloc);
  70                 which->excludes = realloc(which->excludes,
  71                                           which->alloc * sizeof(x));
  72         }
  73         which->excludes[which->nr++] = x;
  74 }
  75
  76 static int add_excludes_from_file_1(const char *fname,
  77                                     const char *base,
  78                                     int baselen,
  79                                     struct exclude_list *which)
  80 {
  81         int fd, i;
  82         long size;
  83         char *buf, *entry;
  84
  85         fd = open(fname, O_RDONLY);
  86         if (fd < 0)
  87                 goto err;
  88         size = lseek(fd, 0, SEEK_END);
  89         if (size < 0)
  90                 goto err;
  91         lseek(fd, 0, SEEK_SET);
  92         if (size == 0) {
  93                 close(fd);
  94                 return 0;
  95         }
  96         buf = xmalloc(size+1);
  97         if (read(fd, buf, size) != size)
  98                 goto err;
  99         close(fd);
 100
 101         buf[size++] = '\n';
 102         entry = buf;
 103         for (i = 0; i < size; i++) {
 104                 if (buf[i] == '\n') {
 105                         if (entry != buf + i && entry[0] != '#') {
 106                                 buf[i - (i && buf[i-1] == '\r')] = 0;
 107                                 add_exclude(entry, base, baselen, which);
 108                         }
 109                         entry = buf + i + 1;
 110                 }
 111         }
 112         return 0;
 113
 114  err:
 115         if (0 <= fd)
 116                 close(fd);
 117         return -1;
 118 }
 119
 120 static void add_excludes_from_file(const char *fname)
 121 {
 122         if (add_excludes_from_file_1(fname, "", 0,
 123                                      &exclude_list[EXC_FILE]) < 0)
 124                 die("cannot use %s as an exclude file", fname);
 125 }
 126
 127 static int push_exclude_per_directory(const char *base, int baselen)
 128 {
 129         char exclude_file[PATH_MAX];
 130         struct exclude_list *el = &exclude_list[EXC_DIRS];
 131         int current_nr = el->nr;
 132
 133         if (exclude_per_dir) {
 134                 memcpy(exclude_file, base, baselen);
 135                 strcpy(exclude_file + baselen, exclude_per_dir);
 136                 add_excludes_from_file_1(exclude_file, base, baselen, el);
 137         }
 138         return current_nr;
 139 }
 140
 141 static void pop_exclude_per_directory(int stk)
 142 {
 143         struct exclude_list *el = &exclude_list[EXC_DIRS];
 144
 145         while (stk < el->nr)
 146                 free(el->excludes[--el->nr]);
 147 }
 148
 149 /* Scan the list and let the last match determines the fate.
 150  * Return 1 for exclude, 0 for include and -1 for undecided.
 151  */
 152 static int excluded_1(const char *pathname,
 153                       int pathlen,
 154                       struct exclude_list *el)
 155 {
 156         int i;
 157
 158         if (el->nr) {
 159                 for (i = el->nr - 1; 0 <= i; i--) {
 160                         struct exclude *x = el->excludes[i];
 161                         const char *exclude = x->pattern;
 162                         int to_exclude = 1;
 163
 164                         if (*exclude == '!') {
 165                                 to_exclude = 0;
 166                                 exclude++;
 167                         }
 168
 169                         if (!strchr(exclude, '/')) {
 170                                 /* match basename */
 171                                 const char *basename = strrchr(pathname, '/');
 172                                 basename = (basename) ? basename+1 : pathname;
 173                                 if (fnmatch(exclude, basename, 0) == 0)
 174                                         return to_exclude;
 175                         }
 176                         else {
 177                                 /* match with FNM_PATHNAME:
 178                                  * exclude has base (baselen long) implicitly
 179                                  * in front of it.
 180                                  */
 181                                 int baselen = x->baselen;
 182                                 if (*exclude == '/')
 183                                         exclude++;
 184
 185                                 if (pathlen < baselen ||
 186                                     (baselen && pathname[baselen-1] != '/') ||
 187                                     strncmp(pathname, x->base, baselen))
 188                                     continue;
 189
 190                                 if (fnmatch(exclude, pathname+baselen,
 191                                             FNM_PATHNAME) == 0)
 192                                         return to_exclude;
 193                         }
 194                 }
 195         }
 196         return -1; /* undecided */
 197 }
 198
 199 static int excluded(const char *pathname)
 200 {
 201         int pathlen = strlen(pathname);
 202         int st;
 203
 204         for (st = EXC_CMDL; st <= EXC_FILE; st++) {
 205                 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
 206                 case 0:
 207                         return 0;
 208                 case 1:
 209                         return 1;
 210                 }
 211         }
 212         return 0;
 213 }
 214
 215 struct nond_on_fs {
 216         int len;
 217         char name[FLEX_ARRAY]; /* more */
 218 };
 219
 220 static struct nond_on_fs **dir;
 221 static int nr_dir;
 222 static int dir_alloc;
 223
 224 static void add_name(const char *pathname, int len)
 225 {
 226         struct nond_on_fs *ent;
 227
 228         if (cache_name_pos(pathname, len) >= 0)
 229                 return;
 230
 231         if (nr_dir == dir_alloc) {
 232                 dir_alloc = alloc_nr(dir_alloc);
 233                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
 234         }
 235         ent = xmalloc(sizeof(*ent) + len + 1);
 236         ent->len = len;
 237         memcpy(ent->name, pathname, len);
 238         ent->name[len] = 0;
 239         dir[nr_dir++] = ent;
 240 }
 241
 242 static int dir_exists(const char *dirname, int len)
 243 {
 244         int pos = cache_name_pos(dirname, len);
 245         if (pos >= 0)
 246                 return 1;
 247         pos = -pos-1;
 248         if (pos >= active_nr) /* can't */
 249                 return 0;
 250         return !strncmp(active_cache[pos]->name, dirname, len);
 251 }
 252
 253 /*
 254  * Read a directory tree. We currently ignore anything but
 255  * directories, regular files and symlinks. That's because git
 256  * doesn't handle them at all yet. Maybe that will change some
 257  * day.
 258  *
 259  * Also, we ignore the name ".git" (even if it is not a directory).
 260  * That likely will not change.
 261  */
 262 static void read_directory(const char *path, const char *base, int baselen)
 263 {
 264         DIR *dir = opendir(path);
 265
 266         if (dir) {
 267                 int exclude_stk;
 268                 struct dirent *de;
 269                 char fullname[MAXPATHLEN + 1];
 270                 memcpy(fullname, base, baselen);
 271
 272                 exclude_stk = push_exclude_per_directory(base, baselen);
 273
 274                 while ((de = readdir(dir)) != NULL) {
 275                         int len;
 276
 277                         if ((de->d_name[0] == '.') &&
 278                             (de->d_name[1] == 0 ||
 279                              !strcmp(de->d_name + 1, ".") ||
 280                              !strcmp(de->d_name + 1, "git")))
 281                                 continue;
 282                         len = strlen(de->d_name);
 283                         memcpy(fullname + baselen, de->d_name, len+1);
 284                         if (excluded(fullname) != show_ignored) {
 285                                 if (!show_ignored || DTYPE(de) != DT_DIR) {
 286                                         continue;
 287                                 }
 288                         }
 289
 290                         switch (DTYPE(de)) {
 291                         struct stat st;
 292                         default:
 293                                 continue;
 294                         case DT_UNKNOWN:
 295                                 if (lstat(fullname, &st))
 296                                         continue;
 297                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 298                                         break;
 299                                 if (!S_ISDIR(st.st_mode))
 300                                         continue;
 301                                 /* fallthrough */
 302                         case DT_DIR:
 303                                 memcpy(fullname + baselen + len, "/", 2);
 304                                 len++;
 305                                 if (show_other_directories &&
 306                                     !dir_exists(fullname, baselen + len))
 307                                         break;
 308                                 read_directory(fullname, fullname,
 309                                                baselen + len);
 310                                 continue;
 311                         case DT_REG:
 312                         case DT_LNK:
 313                                 break;
 314                         }
 315                         add_name(fullname, baselen + len);
 316                 }
 317                 closedir(dir);
 318
 319                 pop_exclude_per_directory(exclude_stk);
 320         }
 321 }
 322
 323 static int cmp_name(const void *p1, const void *p2)
 324 {
 325         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
 326         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
 327
 328         return cache_name_compare(e1->name, e1->len,
 329                                   e2->name, e2->len);
 330 }
 331
 332 /*
 333  * Match a pathspec against a filename. The first "len" characters
 334  * are the common prefix
 335  */
 336 static int match(const char **spec, char *ps_matched,
 337                  const char *filename, int len)
 338 {
 339         const char *m;
 340
 341         while ((m = *spec++) != NULL) {
 342                 int matchlen = strlen(m + len);
 343
 344                 if (!matchlen)
 345                         goto matched;
 346                 if (!strncmp(m + len, filename + len, matchlen)) {
 347                         if (m[len + matchlen - 1] == '/')
 348                                 goto matched;
 349                         switch (filename[len + matchlen]) {
 350                         case '/': case '\0':
 351                                 goto matched;
 352                         }
 353                 }
 354                 if (!fnmatch(m + len, filename + len, 0))
 355                         goto matched;
 356                 if (ps_matched)
 357                         ps_matched++;
 358                 continue;
 359         matched:
 360                 if (ps_matched)
 361                         *ps_matched = 1;
 362                 return 1;
 363         }
 364         return 0;
 365 }
 366
 367 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
 368 {
 369         int len = prefix_len;
 370         int offset = prefix_offset;
 371
 372         if (len >= ent->len)
 373                 die("git-ls-files: internal error - directory entry not superset of prefix");
 374
 375         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
 376                 return;
 377
 378         fputs(tag, stdout);
 379         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
 380         putchar(line_terminator);
 381 }
 382
 383 static void show_other_files(void)
 384 {
 385         int i;
 386         for (i = 0; i < nr_dir; i++) {
 387                 /* We should not have a matching entry, but we
 388                  * may have an unmerged entry for this path.
 389                  */
 390                 struct nond_on_fs *ent = dir[i];
 391                 int pos = cache_name_pos(ent->name, ent->len);
 392                 struct cache_entry *ce;
 393                 if (0 <= pos)
 394                         die("bug in show-other-files");
 395                 pos = -pos - 1;
 396                 if (pos < active_nr) {
 397                         ce = active_cache[pos];
 398                         if (ce_namelen(ce) == ent->len &&
 399                             !memcmp(ce->name, ent->name, ent->len))
 400                                 continue; /* Yup, this one exists unmerged */
 401                 }
 402                 show_dir_entry(tag_other, ent);
 403         }
 404 }
 405
 406 static void show_killed_files(void)
 407 {
 408         int i;
 409         for (i = 0; i < nr_dir; i++) {
 410                 struct nond_on_fs *ent = dir[i];
 411                 char *cp, *sp;
 412                 int pos, len, killed = 0;
 413
 414                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 415                         sp = strchr(cp, '/');
 416                         if (!sp) {
 417                                 /* If ent->name is prefix of an entry in the
 418                                  * cache, it will be killed.
 419                                  */
 420                                 pos = cache_name_pos(ent->name, ent->len);
 421                                 if (0 <= pos)
 422                                         die("bug in show-killed-files");
 423                                 pos = -pos - 1;
 424                                 while (pos < active_nr &&
 425                                        ce_stage(active_cache[pos]))
 426                                         pos++; /* skip unmerged */
 427                                 if (active_nr <= pos)
 428                                         break;
 429                                 /* pos points at a name immediately after
 430                                  * ent->name in the cache.  Does it expect
 431                                  * ent->name to be a directory?
 432                                  */
 433                                 len = ce_namelen(active_cache[pos]);
 434                                 if ((ent->len < len) &&
 435                                     !strncmp(active_cache[pos]->name,
 436                                              ent->name, ent->len) &&
 437                                     active_cache[pos]->name[ent->len] == '/')
 438                                         killed = 1;
 439                                 break;
 440                         }
 441                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 442                                 /* If any of the leading directories in
 443                                  * ent->name is registered in the cache,
 444                                  * ent->name will be killed.
 445                                  */
 446                                 killed = 1;
 447                                 break;
 448                         }
 449                 }
 450                 if (killed)
 451                         show_dir_entry(tag_killed, dir[i]);
 452         }
 453 }
 454
 455 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 456 {
 457         int len = prefix_len;
 458         int offset = prefix_offset;
 459
 460         if (len >= ce_namelen(ce))
 461                 die("git-ls-files: internal error - cache entry not superset of prefix");
 462
 463         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
 464                 return;
 465
 466         if (tag && *tag && show_valid_bit &&
 467             (ce->ce_flags & htons(CE_VALID))) {
 468                 static char alttag[4];
 469                 memcpy(alttag, tag, 3);
 470                 if (isalpha(tag[0]))
 471                         alttag[0] = tolower(tag[0]);
 472                 else if (tag[0] == '?')
 473                         alttag[0] = '!';
 474                 else {
 475                         alttag[0] = 'v';
 476                         alttag[1] = tag[0];
 477                         alttag[2] = ' ';
 478                         alttag[3] = 0;
 479                 }
 480                 tag = alttag;
 481         }
 482
 483         if (!show_stage) {
 484                 fputs(tag, stdout);
 485                 write_name_quoted("", 0, ce->name + offset,
 486                                   line_terminator, stdout);
 487                 putchar(line_terminator);
 488         }
 489         else {
 490                 printf("%s%06o %s %d\t",
 491                        tag,
 492                        ntohl(ce->ce_mode),
 493                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
 494                                 : sha1_to_hex(ce->sha1),
 495                        ce_stage(ce));
 496                 write_name_quoted("", 0, ce->name + offset,
 497                                   line_terminator, stdout);
 498                 putchar(line_terminator);
 499         }
 500 }
 501
 502 static void show_files(void)
 503 {
 504         int i;
 505
 506         /* For cached/deleted files we don't need to even do the readdir */
 507         if (show_others || show_killed) {
 508                 const char *path = ".", *base = "";
 509                 int baselen = prefix_len;
 510
 511                 if (baselen) {
 512                         path = base = prefix;
 513                         if (exclude_per_dir) {
 514                                 char *p, *pp = xmalloc(baselen+1);
 515                                 memcpy(pp, prefix, baselen+1);
 516                                 p = pp;
 517                                 while (1) {
 518                                         char save = *p;
 519                                         *p = 0;
 520                                         push_exclude_per_directory(pp, p-pp);
 521                                         *p++ = save;
 522                                         if (!save)
 523                                                 break;
 524                                         p = strchr(p, '/');
 525                                         if (p)
 526                                                 p++;
 527                                         else
 528                                                 p = pp + baselen;
 529                                 }
 530                                 free(pp);
 531                         }
 532                 }
 533                 read_directory(path, base, baselen);
 534                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
 535                 if (show_others)
 536                         show_other_files();
 537                 if (show_killed)
 538                         show_killed_files();
 539         }
 540         if (show_cached | show_stage) {
 541                 for (i = 0; i < active_nr; i++) {
 542                         struct cache_entry *ce = active_cache[i];
 543                         if (excluded(ce->name) != show_ignored)
 544                                 continue;
 545                         if (show_unmerged && !ce_stage(ce))
 546                                 continue;
 547                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 548                 }
 549         }
 550         if (show_deleted | show_modified) {
 551                 for (i = 0; i < active_nr; i++) {
 552                         struct cache_entry *ce = active_cache[i];
 553                         struct stat st;
 554                         int err;
 555                         if (excluded(ce->name) != show_ignored)
 556                                 continue;
 557                         err = lstat(ce->name, &st);
 558                         if (show_deleted && err)
 559                                 show_ce_entry(tag_removed, ce);
 560                         if (show_modified && ce_modified(ce, &st, 0))
 561                                 show_ce_entry(tag_modified, ce);
 562                 }
 563         }
 564 }
 565
 566 /*
 567  * Prune the index to only contain stuff starting with "prefix"
 568  */
 569 static void prune_cache(void)
 570 {
 571         int pos = cache_name_pos(prefix, prefix_len);
 572         unsigned int first, last;
 573
 574         if (pos < 0)
 575                 pos = -pos-1;
 576         active_cache += pos;
 577         active_nr -= pos;
 578         first = 0;
 579         last = active_nr;
 580         while (last > first) {
 581                 int next = (last + first) >> 1;
 582                 struct cache_entry *ce = active_cache[next];
 583                 if (!strncmp(ce->name, prefix, prefix_len)) {
 584                         first = next+1;
 585                         continue;
 586                 }
 587                 last = next;
 588         }
 589         active_nr = last;
 590 }
 591
 592 static void verify_pathspec(void)
 593 {
 594         const char **p, *n, *prev;
 595         char *real_prefix;
 596         unsigned long max;
 597
 598         prev = NULL;
 599         max = PATH_MAX;
 600         for (p = pathspec; (n = *p) != NULL; p++) {
 601                 int i, len = 0;
 602                 for (i = 0; i < max; i++) {
 603                         char c = n[i];
 604                         if (prev && prev[i] != c)
 605                                 break;
 606                         if (!c || c == '*' || c == '?')
 607                                 break;
 608                         if (c == '/')
 609                                 len = i+1;
 610                 }
 611                 prev = n;
 612                 if (len < max) {
 613                         max = len;
 614                         if (!max)
 615                                 break;
 616                 }
 617         }
 618
 619         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 620                 die("git-ls-files: cannot generate relative filenames containing '..'");
 621
 622         real_prefix = NULL;
 623         prefix_len = max;
 624         if (max) {
 625                 real_prefix = xmalloc(max + 1);
 626                 memcpy(real_prefix, prev, max);
 627                 real_prefix[max] = 0;
 628         }
 629         prefix = real_prefix;
 630 }
 631
 632 static const char ls_files_usage[] =
 633         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 634         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 635         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
 636         "[--] [<file>]*";
 637
 638 int main(int argc, const char **argv)
 639 {
 640         int i;
 641         int exc_given = 0;
 642
 643         prefix = setup_git_directory();
 644         if (prefix)
 645                 prefix_offset = strlen(prefix);
 646         git_config(git_default_config);
 647
 648         for (i = 1; i < argc; i++) {
 649                 const char *arg = argv[i];
 650
 651                 if (!strcmp(arg, "--")) {
 652                         i++;
 653                         break;
 654                 }
 655                 if (!strcmp(arg, "-z")) {
 656                         line_terminator = 0;
 657                         continue;
 658                 }
 659                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 660                         tag_cached = "H ";
 661                         tag_unmerged = "M ";
 662                         tag_removed = "R ";
 663                         tag_modified = "C ";
 664                         tag_other = "? ";
 665                         tag_killed = "K ";
 666                         if (arg[1] == 'v')
 667                                 show_valid_bit = 1;
 668                         continue;
 669                 }
 670                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 671                         show_cached = 1;
 672                         continue;
 673                 }
 674                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 675                         show_deleted = 1;
 676                         continue;
 677                 }
 678                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 679                         show_modified = 1;
 680                         continue;
 681                 }
 682                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 683                         show_others = 1;
 684                         continue;
 685                 }
 686                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 687                         show_ignored = 1;
 688                         continue;
 689                 }
 690                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 691                         show_stage = 1;
 692                         continue;
 693                 }
 694                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 695                         show_killed = 1;
 696                         continue;
 697                 }
 698                 if (!strcmp(arg, "--directory")) {
 699                         show_other_directories = 1;
 700                         continue;
 701                 }
 702                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 703                         /* There's no point in showing unmerged unless
 704                          * you also show the stage information.
 705                          */
 706                         show_stage = 1;
 707                         show_unmerged = 1;
 708                         continue;
 709                 }
 710                 if (!strcmp(arg, "-x") && i+1 < argc) {
 711                         exc_given = 1;
 712                         add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
 713                         continue;
 714                 }
 715                 if (!strncmp(arg, "--exclude=", 10)) {
 716                         exc_given = 1;
 717                         add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
 718                         continue;
 719                 }
 720                 if (!strcmp(arg, "-X") && i+1 < argc) {
 721                         exc_given = 1;
 722                         add_excludes_from_file(argv[++i]);
 723                         continue;
 724                 }
 725                 if (!strncmp(arg, "--exclude-from=", 15)) {
 726                         exc_given = 1;
 727                         add_excludes_from_file(arg+15);
 728                         continue;
 729                 }
 730                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
 731                         exc_given = 1;
 732                         exclude_per_dir = arg + 24;
 733                         continue;
 734                 }
 735                 if (!strcmp(arg, "--full-name")) {
 736                         prefix_offset = 0;
 737                         continue;
 738                 }
 739                 if (!strcmp(arg, "--error-unmatch")) {
 740                         error_unmatch = 1;
 741                         continue;
 742                 }
 743                 if (!strncmp(arg, "--abbrev=", 9)) {
 744                         abbrev = strtoul(arg+9, NULL, 10);
 745                         if (abbrev && abbrev < MINIMUM_ABBREV)
 746                                 abbrev = MINIMUM_ABBREV;
 747                         else if (abbrev > 40)
 748                                 abbrev = 40;
 749                         continue;
 750                 }
 751                 if (!strcmp(arg, "--abbrev")) {
 752                         abbrev = DEFAULT_ABBREV;
 753                         continue;
 754                 }
 755                 if (*arg == '-')
 756                         usage(ls_files_usage);
 757                 break;
 758         }
 759
 760         pathspec = get_pathspec(prefix, argv + i);
 761
 762         /* Verify that the pathspec matches the prefix */
 763         if (pathspec)
 764                 verify_pathspec();
 765
 766         /* Treat unmatching pathspec elements as errors */
 767         if (pathspec && error_unmatch) {
 768                 int num;
 769                 for (num = 0; pathspec[num]; num++)
 770                         ;
 771                 ps_matched = xcalloc(1, num);
 772         }
 773
 774         if (show_ignored && !exc_given) {
 775                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 776                         argv[0]);
 777                 exit(1);
 778         }
 779
 780         /* With no flags, we default to showing the cached files */
 781         if (!(show_stage | show_deleted | show_others | show_unmerged |
 782               show_killed | show_modified))
 783                 show_cached = 1;
 784
 785         read_cache();
 786         if (prefix)
 787                 prune_cache();
 788         show_files();
 789
 790         if (ps_matched) {
 791                 /* We need to make sure all pathspec matched otherwise
 792                  * it is an error.
 793                  */
 794                 int num, errors = 0;
 795                 for (num = 0; pathspec[num]; num++) {
 796                         if (ps_matched[num])
 797                                 continue;
 798                         error("pathspec '%s' did not match any.",
 799                               pathspec[num] + prefix_offset);
 800                         errors++;
 801                 }
 802                 return errors ? 1 : 0;
 803         }
 804
 805         return 0;
 806 }