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