builtin-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 #include "builtin.h"
  14
  15 static int abbrev = 0;
  16 static int show_deleted = 0;
  17 static int show_cached = 0;
  18 static int show_others = 0;
  19 static int show_ignored = 0;
  20 static int show_stage = 0;
  21 static int show_unmerged = 0;
  22 static int show_modified = 0;
  23 static int show_killed = 0;
  24 static int show_other_directories = 0;
  25 static int hide_empty_directories = 0;
  26 static int show_valid_bit = 0;
  27 static int line_terminator = '\n';
  28
  29 static int prefix_len = 0, prefix_offset = 0;
  30 static const char *prefix = NULL;
  31 static const char **pathspec = NULL;
  32 static int error_unmatch = 0;
  33 static char *ps_matched = NULL;
  34
  35 static const char *tag_cached = "";
  36 static const char *tag_unmerged = "";
  37 static const char *tag_removed = "";
  38 static const char *tag_other = "";
  39 static const char *tag_killed = "";
  40 static const char *tag_modified = "";
  41
  42 static const char *exclude_per_dir = NULL;
  43
  44 /* We maintain three exclude pattern lists:
  45  * EXC_CMDL lists patterns explicitly given on the command line.
  46  * EXC_DIRS lists patterns obtained from per-directory ignore files.
  47  * EXC_FILE lists patterns from fallback ignore files.
  48  */
  49 #define EXC_CMDL 0
  50 #define EXC_DIRS 1
  51 #define EXC_FILE 2
  52 static struct exclude_list {
  53         int nr;
  54         int alloc;
  55         struct exclude {
  56                 const char *pattern;
  57                 const char *base;
  58                 int baselen;
  59         } **excludes;
  60 } exclude_list[3];
  61
  62 static void add_exclude(const char *string, const char *base,
  63                         int baselen, struct exclude_list *which)
  64 {
  65         struct exclude *x = xmalloc(sizeof (*x));
  66
  67         x->pattern = string;
  68         x->base = base;
  69         x->baselen = baselen;
  70         if (which->nr == which->alloc) {
  71                 which->alloc = alloc_nr(which->alloc);
  72                 which->excludes = realloc(which->excludes,
  73                                           which->alloc * sizeof(x));
  74         }
  75         which->excludes[which->nr++] = x;
  76 }
  77
  78 static int add_excludes_from_file_1(const char *fname,
  79                                     const char *base,
  80                                     int baselen,
  81                                     struct exclude_list *which)
  82 {
  83         int fd, i;
  84         long size;
  85         char *buf, *entry;
  86
  87         fd = open(fname, O_RDONLY);
  88         if (fd < 0)
  89                 goto err;
  90         size = lseek(fd, 0, SEEK_END);
  91         if (size < 0)
  92                 goto err;
  93         lseek(fd, 0, SEEK_SET);
  94         if (size == 0) {
  95                 close(fd);
  96                 return 0;
  97         }
  98         buf = xmalloc(size+1);
  99         if (read(fd, buf, size) != size)
 100                 goto err;
 101         close(fd);
 102
 103         buf[size++] = '\n';
 104         entry = buf;
 105         for (i = 0; i < size; i++) {
 106                 if (buf[i] == '\n') {
 107                         if (entry != buf + i && entry[0] != '#') {
 108                                 buf[i - (i && buf[i-1] == '\r')] = 0;
 109                                 add_exclude(entry, base, baselen, which);
 110                         }
 111                         entry = buf + i + 1;
 112                 }
 113         }
 114         return 0;
 115
 116  err:
 117         if (0 <= fd)
 118                 close(fd);
 119         return -1;
 120 }
 121
 122 static void add_excludes_from_file(const char *fname)
 123 {
 124         if (add_excludes_from_file_1(fname, "", 0,
 125                                      &exclude_list[EXC_FILE]) < 0)
 126                 die("cannot use %s as an exclude file", fname);
 127 }
 128
 129 static int push_exclude_per_directory(const char *base, int baselen)
 130 {
 131         char exclude_file[PATH_MAX];
 132         struct exclude_list *el = &exclude_list[EXC_DIRS];
 133         int current_nr = el->nr;
 134
 135         if (exclude_per_dir) {
 136                 memcpy(exclude_file, base, baselen);
 137                 strcpy(exclude_file + baselen, exclude_per_dir);
 138                 add_excludes_from_file_1(exclude_file, base, baselen, el);
 139         }
 140         return current_nr;
 141 }
 142
 143 static void pop_exclude_per_directory(int stk)
 144 {
 145         struct exclude_list *el = &exclude_list[EXC_DIRS];
 146
 147         while (stk < el->nr)
 148                 free(el->excludes[--el->nr]);
 149 }
 150
 151 /* Scan the list and let the last match determines the fate.
 152  * Return 1 for exclude, 0 for include and -1 for undecided.
 153  */
 154 static int excluded_1(const char *pathname,
 155                       int pathlen,
 156                       struct exclude_list *el)
 157 {
 158         int i;
 159
 160         if (el->nr) {
 161                 for (i = el->nr - 1; 0 <= i; i--) {
 162                         struct exclude *x = el->excludes[i];
 163                         const char *exclude = x->pattern;
 164                         int to_exclude = 1;
 165
 166                         if (*exclude == '!') {
 167                                 to_exclude = 0;
 168                                 exclude++;
 169                         }
 170
 171                         if (!strchr(exclude, '/')) {
 172                                 /* match basename */
 173                                 const char *basename = strrchr(pathname, '/');
 174                                 basename = (basename) ? basename+1 : pathname;
 175                                 if (fnmatch(exclude, basename, 0) == 0)
 176                                         return to_exclude;
 177                         }
 178                         else {
 179                                 /* match with FNM_PATHNAME:
 180                                  * exclude has base (baselen long) implicitly
 181                                  * in front of it.
 182                                  */
 183                                 int baselen = x->baselen;
 184                                 if (*exclude == '/')
 185                                         exclude++;
 186
 187                                 if (pathlen < baselen ||
 188                                     (baselen && pathname[baselen-1] != '/') ||
 189                                     strncmp(pathname, x->base, baselen))
 190                                     continue;
 191
 192                                 if (fnmatch(exclude, pathname+baselen,
 193                                             FNM_PATHNAME) == 0)
 194                                         return to_exclude;
 195                         }
 196                 }
 197         }
 198         return -1; /* undecided */
 199 }
 200
 201 static int excluded(const char *pathname)
 202 {
 203         int pathlen = strlen(pathname);
 204         int st;
 205
 206         for (st = EXC_CMDL; st <= EXC_FILE; st++) {
 207                 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
 208                 case 0:
 209                         return 0;
 210                 case 1:
 211                         return 1;
 212                 }
 213         }
 214         return 0;
 215 }
 216
 217 struct nond_on_fs {
 218         int len;
 219         char name[FLEX_ARRAY]; /* more */
 220 };
 221
 222 static struct nond_on_fs **dir;
 223 static int nr_dir;
 224 static int dir_alloc;
 225
 226 static void add_name(const char *pathname, int len)
 227 {
 228         struct nond_on_fs *ent;
 229
 230         if (cache_name_pos(pathname, len) >= 0)
 231                 return;
 232
 233         if (nr_dir == dir_alloc) {
 234                 dir_alloc = alloc_nr(dir_alloc);
 235                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
 236         }
 237         ent = xmalloc(sizeof(*ent) + len + 1);
 238         ent->len = len;
 239         memcpy(ent->name, pathname, len);
 240         ent->name[len] = 0;
 241         dir[nr_dir++] = ent;
 242 }
 243
 244 static int dir_exists(const char *dirname, int len)
 245 {
 246         int pos = cache_name_pos(dirname, len);
 247         if (pos >= 0)
 248                 return 1;
 249         pos = -pos-1;
 250         if (pos >= active_nr) /* can't */
 251                 return 0;
 252         return !strncmp(active_cache[pos]->name, dirname, len);
 253 }
 254
 255 /*
 256  * Read a directory tree. We currently ignore anything but
 257  * directories, regular files and symlinks. That's because git
 258  * doesn't handle them at all yet. Maybe that will change some
 259  * day.
 260  *
 261  * Also, we ignore the name ".git" (even if it is not a directory).
 262  * That likely will not change.
 263  */
 264 static int read_directory(const char *path, const char *base, int baselen)
 265 {
 266         DIR *fdir = opendir(path);
 267         int contents = 0;
 268
 269         if (fdir) {
 270                 int exclude_stk;
 271                 struct dirent *de;
 272                 char fullname[MAXPATHLEN + 1];
 273                 memcpy(fullname, base, baselen);
 274
 275                 exclude_stk = push_exclude_per_directory(base, baselen);
 276
 277                 while ((de = readdir(fdir)) != NULL) {
 278                         int len;
 279
 280                         if ((de->d_name[0] == '.') &&
 281                             (de->d_name[1] == 0 ||
 282                              !strcmp(de->d_name + 1, ".") ||
 283                              !strcmp(de->d_name + 1, "git")))
 284                                 continue;
 285                         len = strlen(de->d_name);
 286                         memcpy(fullname + baselen, de->d_name, len+1);
 287                         if (excluded(fullname) != show_ignored) {
 288                                 if (!show_ignored || DTYPE(de) != DT_DIR) {
 289                                         continue;
 290                                 }
 291                         }
 292
 293                         switch (DTYPE(de)) {
 294                         struct stat st;
 295                         int subdir, rewind_base;
 296                         default:
 297                                 continue;
 298                         case DT_UNKNOWN:
 299                                 if (lstat(fullname, &st))
 300                                         continue;
 301                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 302                                         break;
 303                                 if (!S_ISDIR(st.st_mode))
 304                                         continue;
 305                                 /* fallthrough */
 306                         case DT_DIR:
 307                                 memcpy(fullname + baselen + len, "/", 2);
 308                                 len++;
 309                                 rewind_base = nr_dir;
 310                                 subdir = read_directory(fullname, fullname,
 311                                                         baselen + len);
 312                                 if (show_other_directories &&
 313                                     (subdir || !hide_empty_directories) &&
 314                                     !dir_exists(fullname, baselen + len)) {
 315                                         // Rewind the read subdirectory
 316                                         while (nr_dir > rewind_base)
 317                                                 free(dir[--nr_dir]);
 318                                         break;
 319                                 }
 320                                 contents += subdir;
 321                                 continue;
 322                         case DT_REG:
 323                         case DT_LNK:
 324                                 break;
 325                         }
 326                         add_name(fullname, baselen + len);
 327                         contents++;
 328                 }
 329                 closedir(fdir);
 330
 331                 pop_exclude_per_directory(exclude_stk);
 332         }
 333
 334         return contents;
 335 }
 336
 337 static int cmp_name(const void *p1, const void *p2)
 338 {
 339         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
 340         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
 341
 342         return cache_name_compare(e1->name, e1->len,
 343                                   e2->name, e2->len);
 344 }
 345
 346 /*
 347  * Match a pathspec against a filename. The first "len" characters
 348  * are the common prefix
 349  */
 350 static int match(const char **spec, char *ps_matched,
 351                  const char *filename, int len)
 352 {
 353         const char *m;
 354
 355         while ((m = *spec++) != NULL) {
 356                 int matchlen = strlen(m + len);
 357
 358                 if (!matchlen)
 359                         goto matched;
 360                 if (!strncmp(m + len, filename + len, matchlen)) {
 361                         if (m[len + matchlen - 1] == '/')
 362                                 goto matched;
 363                         switch (filename[len + matchlen]) {
 364                         case '/': case '\0':
 365                                 goto matched;
 366                         }
 367                 }
 368                 if (!fnmatch(m + len, filename + len, 0))
 369                         goto matched;
 370                 if (ps_matched)
 371                         ps_matched++;
 372                 continue;
 373         matched:
 374                 if (ps_matched)
 375                         *ps_matched = 1;
 376                 return 1;
 377         }
 378         return 0;
 379 }
 380
 381 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
 382 {
 383         int len = prefix_len;
 384         int offset = prefix_offset;
 385
 386         if (len >= ent->len)
 387                 die("git-ls-files: internal error - directory entry not superset of prefix");
 388
 389         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
 390                 return;
 391
 392         fputs(tag, stdout);
 393         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
 394         putchar(line_terminator);
 395 }
 396
 397 static void show_other_files(void)
 398 {
 399         int i;
 400         for (i = 0; i < nr_dir; i++) {
 401                 /* We should not have a matching entry, but we
 402                  * may have an unmerged entry for this path.
 403                  */
 404                 struct nond_on_fs *ent = dir[i];
 405                 int pos = cache_name_pos(ent->name, ent->len);
 406                 struct cache_entry *ce;
 407                 if (0 <= pos)
 408                         die("bug in show-other-files");
 409                 pos = -pos - 1;
 410                 if (pos < active_nr) {
 411                         ce = active_cache[pos];
 412                         if (ce_namelen(ce) == ent->len &&
 413                             !memcmp(ce->name, ent->name, ent->len))
 414                                 continue; /* Yup, this one exists unmerged */
 415                 }
 416                 show_dir_entry(tag_other, ent);
 417         }
 418 }
 419
 420 static void show_killed_files(void)
 421 {
 422         int i;
 423         for (i = 0; i < nr_dir; i++) {
 424                 struct nond_on_fs *ent = dir[i];
 425                 char *cp, *sp;
 426                 int pos, len, killed = 0;
 427
 428                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 429                         sp = strchr(cp, '/');
 430                         if (!sp) {
 431                                 /* If ent->name is prefix of an entry in the
 432                                  * cache, it will be killed.
 433                                  */
 434                                 pos = cache_name_pos(ent->name, ent->len);
 435                                 if (0 <= pos)
 436                                         die("bug in show-killed-files");
 437                                 pos = -pos - 1;
 438                                 while (pos < active_nr &&
 439                                        ce_stage(active_cache[pos]))
 440                                         pos++; /* skip unmerged */
 441                                 if (active_nr <= pos)
 442                                         break;
 443                                 /* pos points at a name immediately after
 444                                  * ent->name in the cache.  Does it expect
 445                                  * ent->name to be a directory?
 446                                  */
 447                                 len = ce_namelen(active_cache[pos]);
 448                                 if ((ent->len < len) &&
 449                                     !strncmp(active_cache[pos]->name,
 450                                              ent->name, ent->len) &&
 451                                     active_cache[pos]->name[ent->len] == '/')
 452                                         killed = 1;
 453                                 break;
 454                         }
 455                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 456                                 /* If any of the leading directories in
 457                                  * ent->name is registered in the cache,
 458                                  * ent->name will be killed.
 459                                  */
 460                                 killed = 1;
 461                                 break;
 462                         }
 463                 }
 464                 if (killed)
 465                         show_dir_entry(tag_killed, dir[i]);
 466         }
 467 }
 468
 469 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 470 {
 471         int len = prefix_len;
 472         int offset = prefix_offset;
 473
 474         if (len >= ce_namelen(ce))
 475                 die("git-ls-files: internal error - cache entry not superset of prefix");
 476
 477         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
 478                 return;
 479
 480         if (tag && *tag && show_valid_bit &&
 481             (ce->ce_flags & htons(CE_VALID))) {
 482                 static char alttag[4];
 483                 memcpy(alttag, tag, 3);
 484                 if (isalpha(tag[0]))
 485                         alttag[0] = tolower(tag[0]);
 486                 else if (tag[0] == '?')
 487                         alttag[0] = '!';
 488                 else {
 489                         alttag[0] = 'v';
 490                         alttag[1] = tag[0];
 491                         alttag[2] = ' ';
 492                         alttag[3] = 0;
 493                 }
 494                 tag = alttag;
 495         }
 496
 497         if (!show_stage) {
 498                 fputs(tag, stdout);
 499                 write_name_quoted("", 0, ce->name + offset,
 500                                   line_terminator, stdout);
 501                 putchar(line_terminator);
 502         }
 503         else {
 504                 printf("%s%06o %s %d\t",
 505                        tag,
 506                        ntohl(ce->ce_mode),
 507                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
 508                                 : sha1_to_hex(ce->sha1),
 509                        ce_stage(ce));
 510                 write_name_quoted("", 0, ce->name + offset,
 511                                   line_terminator, stdout);
 512                 putchar(line_terminator);
 513         }
 514 }
 515
 516 static void show_files(void)
 517 {
 518         int i;
 519
 520         /* For cached/deleted files we don't need to even do the readdir */
 521         if (show_others || show_killed) {
 522                 const char *path = ".", *base = "";
 523                 int baselen = prefix_len;
 524
 525                 if (baselen) {
 526                         path = base = prefix;
 527                         if (exclude_per_dir) {
 528                                 char *p, *pp = xmalloc(baselen+1);
 529                                 memcpy(pp, prefix, baselen+1);
 530                                 p = pp;
 531                                 while (1) {
 532                                         char save = *p;
 533                                         *p = 0;
 534                                         push_exclude_per_directory(pp, p-pp);
 535                                         *p++ = save;
 536                                         if (!save)
 537                                                 break;
 538                                         p = strchr(p, '/');
 539                                         if (p)
 540                                                 p++;
 541                                         else
 542                                                 p = pp + baselen;
 543                                 }
 544                                 free(pp);
 545                         }
 546                 }
 547                 read_directory(path, base, baselen);
 548                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
 549                 if (show_others)
 550                         show_other_files();
 551                 if (show_killed)
 552                         show_killed_files();
 553         }
 554         if (show_cached | show_stage) {
 555                 for (i = 0; i < active_nr; i++) {
 556                         struct cache_entry *ce = active_cache[i];
 557                         if (excluded(ce->name) != show_ignored)
 558                                 continue;
 559                         if (show_unmerged && !ce_stage(ce))
 560                                 continue;
 561                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 562                 }
 563         }
 564         if (show_deleted | show_modified) {
 565                 for (i = 0; i < active_nr; i++) {
 566                         struct cache_entry *ce = active_cache[i];
 567                         struct stat st;
 568                         int err;
 569                         if (excluded(ce->name) != show_ignored)
 570                                 continue;
 571                         err = lstat(ce->name, &st);
 572                         if (show_deleted && err)
 573                                 show_ce_entry(tag_removed, ce);
 574                         if (show_modified && ce_modified(ce, &st, 0))
 575                                 show_ce_entry(tag_modified, ce);
 576                 }
 577         }
 578 }
 579
 580 /*
 581  * Prune the index to only contain stuff starting with "prefix"
 582  */
 583 static void prune_cache(void)
 584 {
 585         int pos = cache_name_pos(prefix, prefix_len);
 586         unsigned int first, last;
 587
 588         if (pos < 0)
 589                 pos = -pos-1;
 590         active_cache += pos;
 591         active_nr -= pos;
 592         first = 0;
 593         last = active_nr;
 594         while (last > first) {
 595                 int next = (last + first) >> 1;
 596                 struct cache_entry *ce = active_cache[next];
 597                 if (!strncmp(ce->name, prefix, prefix_len)) {
 598                         first = next+1;
 599                         continue;
 600                 }
 601                 last = next;
 602         }
 603         active_nr = last;
 604 }
 605
 606 static void verify_pathspec(void)
 607 {
 608         const char **p, *n, *prev;
 609         char *real_prefix;
 610         unsigned long max;
 611
 612         prev = NULL;
 613         max = PATH_MAX;
 614         for (p = pathspec; (n = *p) != NULL; p++) {
 615                 int i, len = 0;
 616                 for (i = 0; i < max; i++) {
 617                         char c = n[i];
 618                         if (prev && prev[i] != c)
 619                                 break;
 620                         if (!c || c == '*' || c == '?')
 621                                 break;
 622                         if (c == '/')
 623                                 len = i+1;
 624                 }
 625                 prev = n;
 626                 if (len < max) {
 627                         max = len;
 628                         if (!max)
 629                                 break;
 630                 }
 631         }
 632
 633         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 634                 die("git-ls-files: cannot generate relative filenames containing '..'");
 635
 636         real_prefix = NULL;
 637         prefix_len = max;
 638         if (max) {
 639                 real_prefix = xmalloc(max + 1);
 640                 memcpy(real_prefix, prev, max);
 641                 real_prefix[max] = 0;
 642         }
 643         prefix = real_prefix;
 644 }
 645
 646 static const char ls_files_usage[] =
 647         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 648         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 649         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
 650         "[--] [<file>]*";
 651
 652 int cmd_ls_files(int argc, const char **argv, char** envp)
 653 {
 654         int i;
 655         int exc_given = 0;
 656
 657         prefix = setup_git_directory();
 658         if (prefix)
 659                 prefix_offset = strlen(prefix);
 660         git_config(git_default_config);
 661
 662         for (i = 1; i < argc; i++) {
 663                 const char *arg = argv[i];
 664
 665                 if (!strcmp(arg, "--")) {
 666                         i++;
 667                         break;
 668                 }
 669                 if (!strcmp(arg, "-z")) {
 670                         line_terminator = 0;
 671                         continue;
 672                 }
 673                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 674                         tag_cached = "H ";
 675                         tag_unmerged = "M ";
 676                         tag_removed = "R ";
 677                         tag_modified = "C ";
 678                         tag_other = "? ";
 679                         tag_killed = "K ";
 680                         if (arg[1] == 'v')
 681                                 show_valid_bit = 1;
 682                         continue;
 683                 }
 684                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 685                         show_cached = 1;
 686                         continue;
 687                 }
 688                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 689                         show_deleted = 1;
 690                         continue;
 691                 }
 692                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 693                         show_modified = 1;
 694                         continue;
 695                 }
 696                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 697                         show_others = 1;
 698                         continue;
 699                 }
 700                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 701                         show_ignored = 1;
 702                         continue;
 703                 }
 704                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 705                         show_stage = 1;
 706                         continue;
 707                 }
 708                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 709                         show_killed = 1;
 710                         continue;
 711                 }
 712                 if (!strcmp(arg, "--directory")) {
 713                         show_other_directories = 1;
 714                         continue;
 715                 }
 716                 if (!strcmp(arg, "--no-empty-directory")) {
 717                         hide_empty_directories = 1;
 718                         continue;
 719                 }
 720                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 721                         /* There's no point in showing unmerged unless
 722                          * you also show the stage information.
 723                          */
 724                         show_stage = 1;
 725                         show_unmerged = 1;
 726                         continue;
 727                 }
 728                 if (!strcmp(arg, "-x") && i+1 < argc) {
 729                         exc_given = 1;
 730                         add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
 731                         continue;
 732                 }
 733                 if (!strncmp(arg, "--exclude=", 10)) {
 734                         exc_given = 1;
 735                         add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
 736                         continue;
 737                 }
 738                 if (!strcmp(arg, "-X") && i+1 < argc) {
 739                         exc_given = 1;
 740                         add_excludes_from_file(argv[++i]);
 741                         continue;
 742                 }
 743                 if (!strncmp(arg, "--exclude-from=", 15)) {
 744                         exc_given = 1;
 745                         add_excludes_from_file(arg+15);
 746                         continue;
 747                 }
 748                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
 749                         exc_given = 1;
 750                         exclude_per_dir = arg + 24;
 751                         continue;
 752                 }
 753                 if (!strcmp(arg, "--full-name")) {
 754                         prefix_offset = 0;
 755                         continue;
 756                 }
 757                 if (!strcmp(arg, "--error-unmatch")) {
 758                         error_unmatch = 1;
 759                         continue;
 760                 }
 761                 if (!strncmp(arg, "--abbrev=", 9)) {
 762                         abbrev = strtoul(arg+9, NULL, 10);
 763                         if (abbrev && abbrev < MINIMUM_ABBREV)
 764                                 abbrev = MINIMUM_ABBREV;
 765                         else if (abbrev > 40)
 766                                 abbrev = 40;
 767                         continue;
 768                 }
 769                 if (!strcmp(arg, "--abbrev")) {
 770                         abbrev = DEFAULT_ABBREV;
 771                         continue;
 772                 }
 773                 if (*arg == '-')
 774                         usage(ls_files_usage);
 775                 break;
 776         }
 777
 778         pathspec = get_pathspec(prefix, argv + i);
 779
 780         /* Verify that the pathspec matches the prefix */
 781         if (pathspec)
 782                 verify_pathspec();
 783
 784         /* Treat unmatching pathspec elements as errors */
 785         if (pathspec && error_unmatch) {
 786                 int num;
 787                 for (num = 0; pathspec[num]; num++)
 788                         ;
 789                 ps_matched = xcalloc(1, num);
 790         }
 791
 792         if (show_ignored && !exc_given) {
 793                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 794                         argv[0]);
 795                 exit(1);
 796         }
 797
 798         /* With no flags, we default to showing the cached files */
 799         if (!(show_stage | show_deleted | show_others | show_unmerged |
 800               show_killed | show_modified))
 801                 show_cached = 1;
 802
 803         read_cache();
 804         if (prefix)
 805                 prune_cache();
 806         show_files();
 807
 808         if (ps_matched) {
 809                 /* We need to make sure all pathspec matched otherwise
 810                  * it is an error.
 811                  */
 812                 int num, errors = 0;
 813                 for (num = 0; pathspec[num]; num++) {
 814                         if (ps_matched[num])
 815                                 continue;
 816                         error("pathspec '%s' did not match any.",
 817                               pathspec[num] + prefix_offset);
 818                         errors++;
 819                 }
 820                 return errors ? 1 : 0;
 821         }
 822
 823         return 0;
 824 }