ls-files.c

   1 /*
   2  * This merges the file listing in the directory cache index
   3  * with the actual working directory list, and shows different
   4  * combinations of the two.
   5  *
   6  * Copyright (C) Linus Torvalds, 2005
   7  */
   8 #include <dirent.h>
   9 #include <fnmatch.h>
  10
  11 #include "cache.h"
  12 #include "quote.h"
  13
  14 static int abbrev = 0;
  15 static int show_deleted = 0;
  16 static int show_cached = 0;
  17 static int show_others = 0;
  18 static int show_ignored = 0;
  19 static int show_stage = 0;
  20 static int show_unmerged = 0;
  21 static int show_modified = 0;
  22 static int show_killed = 0;
  23 static int show_other_directories = 0;
  24 static int hide_empty_directories = 0;
  25 static int show_valid_bit = 0;
  26 static int line_terminator = '\n';
  27
  28 static int prefix_len = 0, prefix_offset = 0;
  29 static const char *prefix = NULL;
  30 static const char **pathspec = NULL;
  31 static int error_unmatch = 0;
  32 static char *ps_matched = NULL;
  33
  34 static const char *tag_cached = "";
  35 static const char *tag_unmerged = "";
  36 static const char *tag_removed = "";
  37 static const char *tag_other = "";
  38 static const char *tag_killed = "";
  39 static const char *tag_modified = "";
  40
  41 static const char *exclude_per_dir = NULL;
  42
  43 /* We maintain three exclude pattern lists:
  44  * EXC_CMDL lists patterns explicitly given on the command line.
  45  * EXC_DIRS lists patterns obtained from per-directory ignore files.
  46  * EXC_FILE lists patterns from fallback ignore files.
  47  */
  48 #define EXC_CMDL 0
  49 #define EXC_DIRS 1
  50 #define EXC_FILE 2
  51 static struct exclude_list {
  52         int nr;
  53         int alloc;
  54         struct exclude {
  55                 const char *pattern;
  56                 const char *base;
  57                 int baselen;
  58         } **excludes;
  59 } exclude_list[3];
  60
  61 static void add_exclude(const char *string, const char *base,
  62                         int baselen, struct exclude_list *which)
  63 {
  64         struct exclude *x = xmalloc(sizeof (*x));
  65
  66         x->pattern = string;
  67         x->base = base;
  68         x->baselen = baselen;
  69         if (which->nr == which->alloc) {
  70                 which->alloc = alloc_nr(which->alloc);
  71                 which->excludes = realloc(which->excludes,
  72                                           which->alloc * sizeof(x));
  73         }
  74         which->excludes[which->nr++] = x;
  75 }
  76
  77 static int add_excludes_from_file_1(const char *fname,
  78                                     const char *base,
  79                                     int baselen,
  80                                     struct exclude_list *which)
  81 {
  82         int fd, i;
  83         long size;
  84         char *buf, *entry;
  85
  86         fd = open(fname, O_RDONLY);
  87         if (fd < 0)
  88                 goto err;
  89         size = lseek(fd, 0, SEEK_END);
  90         if (size < 0)
  91                 goto err;
  92         lseek(fd, 0, SEEK_SET);
  93         if (size == 0) {
  94                 close(fd);
  95                 return 0;
  96         }
  97         buf = xmalloc(size+1);
  98         if (read(fd, buf, size) != size)
  99                 goto err;
 100         close(fd);
 101
 102         buf[size++] = '\n';
 103         entry = buf;
 104         for (i = 0; i < size; i++) {
 105                 if (buf[i] == '\n') {
 106                         if (entry != buf + i && entry[0] != '#') {
 107                                 buf[i - (i && buf[i-1] == '\r')] = 0;
 108                                 add_exclude(entry, base, baselen, which);
 109                         }
 110                         entry = buf + i + 1;
 111                 }
 112         }
 113         return 0;
 114
 115  err:
 116         if (0 <= fd)
 117                 close(fd);
 118         return -1;
 119 }
 120
 121 static void add_excludes_from_file(const char *fname)
 122 {
 123         if (add_excludes_from_file_1(fname, "", 0,
 124                                      &exclude_list[EXC_FILE]) < 0)
 125                 die("cannot use %s as an exclude file", fname);
 126 }
 127
 128 static int push_exclude_per_directory(const char *base, int baselen)
 129 {
 130         char exclude_file[PATH_MAX];
 131         struct exclude_list *el = &exclude_list[EXC_DIRS];
 132         int current_nr = el->nr;
 133
 134         if (exclude_per_dir) {
 135                 memcpy(exclude_file, base, baselen);
 136                 strcpy(exclude_file + baselen, exclude_per_dir);
 137                 add_excludes_from_file_1(exclude_file, base, baselen, el);
 138         }
 139         return current_nr;
 140 }
 141
 142 static void pop_exclude_per_directory(int stk)
 143 {
 144         struct exclude_list *el = &exclude_list[EXC_DIRS];
 145
 146         while (stk < el->nr)
 147                 free(el->excludes[--el->nr]);
 148 }
 149
 150 /* Scan the list and let the last match determines the fate.
 151  * Return 1 for exclude, 0 for include and -1 for undecided.
 152  */
 153 static int excluded_1(const char *pathname,
 154                       int pathlen,
 155                       struct exclude_list *el)
 156 {
 157         int i;
 158
 159         if (el->nr) {
 160                 for (i = el->nr - 1; 0 <= i; i--) {
 161                         struct exclude *x = el->excludes[i];
 162                         const char *exclude = x->pattern;
 163                         int to_exclude = 1;
 164
 165                         if (*exclude == '!') {
 166                                 to_exclude = 0;
 167                                 exclude++;
 168                         }
 169
 170                         if (!strchr(exclude, '/')) {
 171                                 /* match basename */
 172                                 const char *basename = strrchr(pathname, '/');
 173                                 basename = (basename) ? basename+1 : pathname;
 174                                 if (fnmatch(exclude, basename, 0) == 0)
 175                                         return to_exclude;
 176                         }
 177                         else {
 178                                 /* match with FNM_PATHNAME:
 179                                  * exclude has base (baselen long) implicitly
 180                                  * in front of it.
 181                                  */
 182                                 int baselen = x->baselen;
 183                                 if (*exclude == '/')
 184                                         exclude++;
 185
 186                                 if (pathlen < baselen ||
 187                                     (baselen && pathname[baselen-1] != '/') ||
 188                                     strncmp(pathname, x->base, baselen))
 189                                     continue;
 190
 191                                 if (fnmatch(exclude, pathname+baselen,
 192                                             FNM_PATHNAME) == 0)
 193                                         return to_exclude;
 194                         }
 195                 }
 196         }
 197         return -1; /* undecided */
 198 }
 199
 200 static int excluded(const char *pathname)
 201 {
 202         int pathlen = strlen(pathname);
 203         int st;
 204
 205         for (st = EXC_CMDL; st <= EXC_FILE; st++) {
 206                 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
 207                 case 0:
 208                         return 0;
 209                 case 1:
 210                         return 1;
 211                 }
 212         }
 213         return 0;
 214 }
 215
 216 struct nond_on_fs {
 217         int len;
 218         char name[FLEX_ARRAY]; /* more */
 219 };
 220
 221 static struct nond_on_fs **dir;
 222 static int nr_dir;
 223 static int dir_alloc;
 224
 225 static void add_name(const char *pathname, int len)
 226 {
 227         struct nond_on_fs *ent;
 228
 229         if (cache_name_pos(pathname, len) >= 0)
 230                 return;
 231
 232         if (nr_dir == dir_alloc) {
 233                 dir_alloc = alloc_nr(dir_alloc);
 234                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
 235         }
 236         ent = xmalloc(sizeof(*ent) + len + 1);
 237         ent->len = len;
 238         memcpy(ent->name, pathname, len);
 239         ent->name[len] = 0;
 240         dir[nr_dir++] = ent;
 241 }
 242
 243 static int dir_exists(const char *dirname, int len)
 244 {
 245         int pos = cache_name_pos(dirname, len);
 246         if (pos >= 0)
 247                 return 1;
 248         pos = -pos-1;
 249         if (pos >= active_nr) /* can't */
 250                 return 0;
 251         return !strncmp(active_cache[pos]->name, dirname, len);
 252 }
 253
 254 /*
 255  * Read a directory tree. We currently ignore anything but
 256  * directories, regular files and symlinks. That's because git
 257  * doesn't handle them at all yet. Maybe that will change some
 258  * day.
 259  *
 260  * Also, we ignore the name ".git" (even if it is not a directory).
 261  * That likely will not change.
 262  */
 263 static int read_directory(const char *path, const char *base, int baselen)
 264 {
 265         DIR *fdir = opendir(path);
 266         int contents = 0;
 267
 268         if (fdir) {
 269                 int exclude_stk;
 270                 struct dirent *de;
 271                 char fullname[MAXPATHLEN + 1];
 272                 memcpy(fullname, base, baselen);
 273
 274                 exclude_stk = push_exclude_per_directory(base, baselen);
 275
 276                 while ((de = readdir(fdir)) != NULL) {
 277                         int len;
 278
 279                         if ((de->d_name[0] == '.') &&
 280                             (de->d_name[1] == 0 ||
 281                              !strcmp(de->d_name + 1, ".") ||
 282                              !strcmp(de->d_name + 1, "git")))
 283                                 continue;
 284                         len = strlen(de->d_name);
 285                         memcpy(fullname + baselen, de->d_name, len+1);
 286                         if (excluded(fullname) != show_ignored) {
 287                                 if (!show_ignored || DTYPE(de) != DT_DIR) {
 288                                         continue;
 289                                 }
 290                         }
 291
 292                         switch (DTYPE(de)) {
 293                         struct stat st;
 294                         int subdir, rewind_base;
 295                         default:
 296                                 continue;
 297                         case DT_UNKNOWN:
 298                                 if (lstat(fullname, &st))
 299                                         continue;
 300                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 301                                         break;
 302                                 if (!S_ISDIR(st.st_mode))
 303                                         continue;
 304                                 /* fallthrough */
 305                         case DT_DIR:
 306                                 memcpy(fullname + baselen + len, "/", 2);
 307                                 len++;
 308                                 rewind_base = nr_dir;
 309                                 subdir = read_directory(fullname, fullname,
 310                                                         baselen + len);
 311                                 if (show_other_directories &&
 312                                     (subdir || !hide_empty_directories) &&
 313                                     !dir_exists(fullname, baselen + len)) {
 314                                         // Rewind the read subdirectory
 315                                         while (nr_dir > rewind_base)
 316                                                 free(dir[--nr_dir]);
 317                                         break;
 318                                 }
 319                                 contents += subdir;
 320                                 continue;
 321                         case DT_REG:
 322                         case DT_LNK:
 323                                 break;
 324                         }
 325                         add_name(fullname, baselen + len);
 326                         contents++;
 327                 }
 328                 closedir(fdir);
 329
 330                 pop_exclude_per_directory(exclude_stk);
 331         }
 332
 333         return contents;
 334 }
 335
 336 static int cmp_name(const void *p1, const void *p2)
 337 {
 338         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
 339         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
 340
 341         return cache_name_compare(e1->name, e1->len,
 342                                   e2->name, e2->len);
 343 }
 344
 345 /*
 346  * Match a pathspec against a filename. The first "len" characters
 347  * are the common prefix
 348  */
 349 static int match(const char **spec, char *ps_matched,
 350                  const char *filename, int len)
 351 {
 352         const char *m;
 353
 354         while ((m = *spec++) != NULL) {
 355                 int matchlen = strlen(m + len);
 356
 357                 if (!matchlen)
 358                         goto matched;
 359                 if (!strncmp(m + len, filename + len, matchlen)) {
 360                         if (m[len + matchlen - 1] == '/')
 361                                 goto matched;
 362                         switch (filename[len + matchlen]) {
 363                         case '/': case '\0':
 364                                 goto matched;
 365                         }
 366                 }
 367                 if (!fnmatch(m + len, filename + len, 0))
 368                         goto matched;
 369                 if (ps_matched)
 370                         ps_matched++;
 371                 continue;
 372         matched:
 373                 if (ps_matched)
 374                         *ps_matched = 1;
 375                 return 1;
 376         }
 377         return 0;
 378 }
 379
 380 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
 381 {
 382         int len = prefix_len;
 383         int offset = prefix_offset;
 384
 385         if (len >= ent->len)
 386                 die("git-ls-files: internal error - directory entry not superset of prefix");
 387
 388         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
 389                 return;
 390
 391         fputs(tag, stdout);
 392         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
 393         putchar(line_terminator);
 394 }
 395
 396 static void show_other_files(void)
 397 {
 398         int i;
 399         for (i = 0; i < nr_dir; i++) {
 400                 /* We should not have a matching entry, but we
 401                  * may have an unmerged entry for this path.
 402                  */
 403                 struct nond_on_fs *ent = dir[i];
 404                 int pos = cache_name_pos(ent->name, ent->len);
 405                 struct cache_entry *ce;
 406                 if (0 <= pos)
 407                         die("bug in show-other-files");
 408                 pos = -pos - 1;
 409                 if (pos < active_nr) {
 410                         ce = active_cache[pos];
 411                         if (ce_namelen(ce) == ent->len &&
 412                             !memcmp(ce->name, ent->name, ent->len))
 413                                 continue; /* Yup, this one exists unmerged */
 414                 }
 415                 show_dir_entry(tag_other, ent);
 416         }
 417 }
 418
 419 static void show_killed_files(void)
 420 {
 421         int i;
 422         for (i = 0; i < nr_dir; i++) {
 423                 struct nond_on_fs *ent = dir[i];
 424                 char *cp, *sp;
 425                 int pos, len, killed = 0;
 426
 427                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 428                         sp = strchr(cp, '/');
 429                         if (!sp) {
 430                                 /* If ent->name is prefix of an entry in the
 431                                  * cache, it will be killed.
 432                                  */
 433                                 pos = cache_name_pos(ent->name, ent->len);
 434                                 if (0 <= pos)
 435                                         die("bug in show-killed-files");
 436                                 pos = -pos - 1;
 437                                 while (pos < active_nr &&
 438                                        ce_stage(active_cache[pos]))
 439                                         pos++; /* skip unmerged */
 440                                 if (active_nr <= pos)
 441                                         break;
 442                                 /* pos points at a name immediately after
 443                                  * ent->name in the cache.  Does it expect
 444                                  * ent->name to be a directory?
 445                                  */
 446                                 len = ce_namelen(active_cache[pos]);
 447                                 if ((ent->len < len) &&
 448                                     !strncmp(active_cache[pos]->name,
 449                                              ent->name, ent->len) &&
 450                                     active_cache[pos]->name[ent->len] == '/')
 451                                         killed = 1;
 452                                 break;
 453                         }
 454                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 455                                 /* If any of the leading directories in
 456                                  * ent->name is registered in the cache,
 457                                  * ent->name will be killed.
 458                                  */
 459                                 killed = 1;
 460                                 break;
 461                         }
 462                 }
 463                 if (killed)
 464                         show_dir_entry(tag_killed, dir[i]);
 465         }
 466 }
 467
 468 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 469 {
 470         int len = prefix_len;
 471         int offset = prefix_offset;
 472
 473         if (len >= ce_namelen(ce))
 474                 die("git-ls-files: internal error - cache entry not superset of prefix");
 475
 476         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
 477                 return;
 478
 479         if (tag && *tag && show_valid_bit &&
 480             (ce->ce_flags & htons(CE_VALID))) {
 481                 static char alttag[4];
 482                 memcpy(alttag, tag, 3);
 483                 if (isalpha(tag[0]))
 484                         alttag[0] = tolower(tag[0]);
 485                 else if (tag[0] == '?')
 486                         alttag[0] = '!';
 487                 else {
 488                         alttag[0] = 'v';
 489                         alttag[1] = tag[0];
 490                         alttag[2] = ' ';
 491                         alttag[3] = 0;
 492                 }
 493                 tag = alttag;
 494         }
 495
 496         if (!show_stage) {
 497                 fputs(tag, stdout);
 498                 write_name_quoted("", 0, ce->name + offset,
 499                                   line_terminator, stdout);
 500                 putchar(line_terminator);
 501         }
 502         else {
 503                 printf("%s%06o %s %d\t",
 504                        tag,
 505                        ntohl(ce->ce_mode),
 506                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
 507                                 : sha1_to_hex(ce->sha1),
 508                        ce_stage(ce));
 509                 write_name_quoted("", 0, ce->name + offset,
 510                                   line_terminator, stdout);
 511                 putchar(line_terminator);
 512         }
 513 }
 514
 515 static void show_files(void)
 516 {
 517         int i;
 518
 519         /* For cached/deleted files we don't need to even do the readdir */
 520         if (show_others || show_killed) {
 521                 const char *path = ".", *base = "";
 522                 int baselen = prefix_len;
 523
 524                 if (baselen) {
 525                         path = base = prefix;
 526                         if (exclude_per_dir) {
 527                                 char *p, *pp = xmalloc(baselen+1);
 528                                 memcpy(pp, prefix, baselen+1);
 529                                 p = pp;
 530                                 while (1) {
 531                                         char save = *p;
 532                                         *p = 0;
 533                                         push_exclude_per_directory(pp, p-pp);
 534                                         *p++ = save;
 535                                         if (!save)
 536                                                 break;
 537                                         p = strchr(p, '/');
 538                                         if (p)
 539                                                 p++;
 540                                         else
 541                                                 p = pp + baselen;
 542                                 }
 543                                 free(pp);
 544                         }
 545                 }
 546                 read_directory(path, base, baselen);
 547                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
 548                 if (show_others)
 549                         show_other_files();
 550                 if (show_killed)
 551                         show_killed_files();
 552         }
 553         if (show_cached | show_stage) {
 554                 for (i = 0; i < active_nr; i++) {
 555                         struct cache_entry *ce = active_cache[i];
 556                         if (excluded(ce->name) != show_ignored)
 557                                 continue;
 558                         if (show_unmerged && !ce_stage(ce))
 559                                 continue;
 560                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 561                 }
 562         }
 563         if (show_deleted | show_modified) {
 564                 for (i = 0; i < active_nr; i++) {
 565                         struct cache_entry *ce = active_cache[i];
 566                         struct stat st;
 567                         int err;
 568                         if (excluded(ce->name) != show_ignored)
 569                                 continue;
 570                         err = lstat(ce->name, &st);
 571                         if (show_deleted && err)
 572                                 show_ce_entry(tag_removed, ce);
 573                         if (show_modified && ce_modified(ce, &st, 0))
 574                                 show_ce_entry(tag_modified, ce);
 575                 }
 576         }
 577 }
 578
 579 /*
 580  * Prune the index to only contain stuff starting with "prefix"
 581  */
 582 static void prune_cache(void)
 583 {
 584         int pos = cache_name_pos(prefix, prefix_len);
 585         unsigned int first, last;
 586
 587         if (pos < 0)
 588                 pos = -pos-1;
 589         active_cache += pos;
 590         active_nr -= pos;
 591         first = 0;
 592         last = active_nr;
 593         while (last > first) {
 594                 int next = (last + first) >> 1;
 595                 struct cache_entry *ce = active_cache[next];
 596                 if (!strncmp(ce->name, prefix, prefix_len)) {
 597                         first = next+1;
 598                         continue;
 599                 }
 600                 last = next;
 601         }
 602         active_nr = last;
 603 }
 604
 605 static void verify_pathspec(void)
 606 {
 607         const char **p, *n, *prev;
 608         char *real_prefix;
 609         unsigned long max;
 610
 611         prev = NULL;
 612         max = PATH_MAX;
 613         for (p = pathspec; (n = *p) != NULL; p++) {
 614                 int i, len = 0;
 615                 for (i = 0; i < max; i++) {
 616                         char c = n[i];
 617                         if (prev && prev[i] != c)
 618                                 break;
 619                         if (!c || c == '*' || c == '?')
 620                                 break;
 621                         if (c == '/')
 622                                 len = i+1;
 623                 }
 624                 prev = n;
 625                 if (len < max) {
 626                         max = len;
 627                         if (!max)
 628                                 break;
 629                 }
 630         }
 631
 632         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 633                 die("git-ls-files: cannot generate relative filenames containing '..'");
 634
 635         real_prefix = NULL;
 636         prefix_len = max;
 637         if (max) {
 638                 real_prefix = xmalloc(max + 1);
 639                 memcpy(real_prefix, prev, max);
 640                 real_prefix[max] = 0;
 641         }
 642         prefix = real_prefix;
 643 }
 644
 645 static const char ls_files_usage[] =
 646         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 647         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 648         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
 649         "[--] [<file>]*";
 650
 651 int main(int argc, const char **argv)
 652 {
 653         int i;
 654         int exc_given = 0;
 655
 656         prefix = setup_git_directory();
 657         if (prefix)
 658                 prefix_offset = strlen(prefix);
 659         git_config(git_default_config);
 660
 661         for (i = 1; i < argc; i++) {
 662                 const char *arg = argv[i];
 663
 664                 if (!strcmp(arg, "--")) {
 665                         i++;
 666                         break;
 667                 }
 668                 if (!strcmp(arg, "-z")) {
 669                         line_terminator = 0;
 670                         continue;
 671                 }
 672                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 673                         tag_cached = "H ";
 674                         tag_unmerged = "M ";
 675                         tag_removed = "R ";
 676                         tag_modified = "C ";
 677                         tag_other = "? ";
 678                         tag_killed = "K ";
 679                         if (arg[1] == 'v')
 680                                 show_valid_bit = 1;
 681                         continue;
 682                 }
 683                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 684                         show_cached = 1;
 685                         continue;
 686                 }
 687                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 688                         show_deleted = 1;
 689                         continue;
 690                 }
 691                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 692                         show_modified = 1;
 693                         continue;
 694                 }
 695                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 696                         show_others = 1;
 697                         continue;
 698                 }
 699                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 700                         show_ignored = 1;
 701                         continue;
 702                 }
 703                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 704                         show_stage = 1;
 705                         continue;
 706                 }
 707                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 708                         show_killed = 1;
 709                         continue;
 710                 }
 711                 if (!strcmp(arg, "--directory")) {
 712                         show_other_directories = 1;
 713                         continue;
 714                 }
 715                 if (!strcmp(arg, "--no-empty-directory")) {
 716                         hide_empty_directories = 1;
 717                         continue;
 718                 }
 719                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 720                         /* There's no point in showing unmerged unless
 721                          * you also show the stage information.
 722                          */
 723                         show_stage = 1;
 724                         show_unmerged = 1;
 725                         continue;
 726                 }
 727                 if (!strcmp(arg, "-x") && i+1 < argc) {
 728                         exc_given = 1;
 729                         add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
 730                         continue;
 731                 }
 732                 if (!strncmp(arg, "--exclude=", 10)) {
 733                         exc_given = 1;
 734                         add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
 735                         continue;
 736                 }
 737                 if (!strcmp(arg, "-X") && i+1 < argc) {
 738                         exc_given = 1;
 739                         add_excludes_from_file(argv[++i]);
 740                         continue;
 741                 }
 742                 if (!strncmp(arg, "--exclude-from=", 15)) {
 743                         exc_given = 1;
 744                         add_excludes_from_file(arg+15);
 745                         continue;
 746                 }
 747                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
 748                         exc_given = 1;
 749                         exclude_per_dir = arg + 24;
 750                         continue;
 751                 }
 752                 if (!strcmp(arg, "--full-name")) {
 753                         prefix_offset = 0;
 754                         continue;
 755                 }
 756                 if (!strcmp(arg, "--error-unmatch")) {
 757                         error_unmatch = 1;
 758                         continue;
 759                 }
 760                 if (!strncmp(arg, "--abbrev=", 9)) {
 761                         abbrev = strtoul(arg+9, NULL, 10);
 762                         if (abbrev && abbrev < MINIMUM_ABBREV)
 763                                 abbrev = MINIMUM_ABBREV;
 764                         else if (abbrev > 40)
 765                                 abbrev = 40;
 766                         continue;
 767                 }
 768                 if (!strcmp(arg, "--abbrev")) {
 769                         abbrev = DEFAULT_ABBREV;
 770                         continue;
 771                 }
 772                 if (*arg == '-')
 773                         usage(ls_files_usage);
 774                 break;
 775         }
 776
 777         pathspec = get_pathspec(prefix, argv + i);
 778
 779         /* Verify that the pathspec matches the prefix */
 780         if (pathspec)
 781                 verify_pathspec();
 782
 783         /* Treat unmatching pathspec elements as errors */
 784         if (pathspec && error_unmatch) {
 785                 int num;
 786                 for (num = 0; pathspec[num]; num++)
 787                         ;
 788                 ps_matched = xcalloc(1, num);
 789         }
 790
 791         if (show_ignored && !exc_given) {
 792                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 793                         argv[0]);
 794                 exit(1);
 795         }
 796
 797         /* With no flags, we default to showing the cached files */
 798         if (!(show_stage | show_deleted | show_others | show_unmerged |
 799               show_killed | show_modified))
 800                 show_cached = 1;
 801
 802         read_cache();
 803         if (prefix)
 804                 prune_cache();
 805         show_files();
 806
 807         if (ps_matched) {
 808                 /* We need to make sure all pathspec matched otherwise
 809                  * it is an error.
 810                  */
 811                 int num, errors = 0;
 812                 for (num = 0; pathspec[num]; num++) {
 813                         if (ps_matched[num])
 814                                 continue;
 815                         error("pathspec '%s' did not match any.",
 816                               pathspec[num] + prefix_offset);
 817                         errors++;
 818                 }
 819                 return errors ? 1 : 0;
 820         }
 821
 822         return 0;
 823 }