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