4 * Copyright (C) Linus Torvalds, 2005
6 * This applies patches on top of some (arbitrary) version of the SCM.
8 * NOTE! It does all its work in the index file, and only cares about
9 * the files in the working directory if you tell it to "merge" the
12 * Even when merging it always takes the source from the index, and
13 * uses the working tree as a "branch" for a 3-way merge.
19 // We default to the merge behaviour, since that's what most people would
22 // --check turns on checking that the working tree matches the
23 // files that are being modified, but doesn't apply the patch
24 // --stat does just a diffstat, and doesn't actually apply
25 // --show-files shows the directory changes
27 static int merge_patch = 1;
28 static int check_index = 0;
29 static int write_index = 0;
30 static int diffstat = 0;
33 static int show_files = 0;
34 static const char apply_usage[] = "git-apply [--stat] [--check] [--show-files] <patch>";
37 * For "diff-stat" like behaviour, we keep track of the biggest change
38 * we've seen, and the longest filename. That allows us to do simple
41 static int max_change, max_len;
44 * Various "current state", notably line numbers and what
45 * file (and how) we're patching right now.. The "is_xxxx"
46 * things are flags, where -1 means "don't know yet".
48 static int linenr = 1;
51 unsigned long oldpos, oldlines;
52 unsigned long newpos, newlines;
55 struct fragment *next;
59 char *new_name, *old_name, *def_name;
60 unsigned int old_mode, new_mode;
61 int is_rename, is_copy, is_new, is_delete;
62 int lines_added, lines_deleted;
63 struct fragment *fragments;
65 unsigned long resultsize;
69 #define CHUNKSIZE (8192)
72 static void *read_patch_file(int fd, unsigned long *sizep)
74 unsigned long size = 0, alloc = CHUNKSIZE;
75 void *buffer = xmalloc(alloc);
78 int nr = alloc - size;
81 buffer = xrealloc(buffer, alloc);
84 nr = read(fd, buffer + size, nr);
90 die("git-apply: read returned %s", strerror(errno));
97 * Make sure that we have some slop in the buffer
98 * so that we can do speculative "memcmp" etc, and
99 * see to it that it is NUL-filled.
101 if (alloc < size + SLOP)
102 buffer = xrealloc(buffer, size + SLOP);
103 memset(buffer + size, 0, SLOP);
107 static unsigned long linelen(const char *buffer, unsigned long size)
109 unsigned long len = 0;
112 if (*buffer++ == '\n')
118 static int is_dev_null(const char *str)
120 return !memcmp("/dev/null", str, 9) && isspace(str[9]);
126 static int name_terminate(const char *name, int namelen, int c, int terminate)
128 if (c == ' ' && !(terminate & TERM_SPACE))
130 if (c == '\t' && !(terminate & TERM_TAB))
136 static char * find_name(const char *line, char *def, int p_value, int terminate)
139 const char *start = line;
148 if (name_terminate(start, line-start, c, terminate))
152 if (c == '/' && !--p_value)
162 * Generally we prefer the shorter name, especially
163 * if the other one is just a variation of that with
164 * something else tacked on to the end (ie "file.orig"
168 int deflen = strlen(def);
169 if (deflen < len && !strncmp(start, def, deflen))
173 name = xmalloc(len + 1);
174 memcpy(name, start, len);
181 * Get the name etc info from the --/+++ lines of a traditional patch header
183 * NOTE! This hardcodes "-p1" behaviour in filename detection.
185 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
186 * files, we can happily check the index for a match, but for creating a
187 * new file we should try to match whatever "patch" does. I have no idea.
189 static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
194 first += 4; // skip "--- "
195 second += 4; // skip "+++ "
196 if (is_dev_null(first)) {
198 patch->is_delete = 0;
199 name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
200 patch->new_name = name;
201 } else if (is_dev_null(second)) {
203 patch->is_delete = 1;
204 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
205 patch->old_name = name;
207 name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
208 name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
209 patch->old_name = patch->new_name = name;
212 die("unable to find filename in patch at line %d", linenr);
215 static int gitdiff_hdrend(const char *line, struct patch *patch)
221 * We're anal about diff header consistency, to make
222 * sure that we don't end up having strange ambiguous
223 * patches floating around.
225 * As a result, gitdiff_{old|new}name() will check
226 * their names against any previous information, just
229 static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
234 if (!orig_name && !isnull)
235 return find_name(line, NULL, 1, 0);
243 die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
256 if (memcmp(line, name, len) || line[len] != '\n')
260 die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
264 static int gitdiff_oldname(const char *line, struct patch *patch)
266 patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
270 static int gitdiff_newname(const char *line, struct patch *patch)
272 patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
276 static int gitdiff_oldmode(const char *line, struct patch *patch)
278 patch->old_mode = strtoul(line, NULL, 8);
282 static int gitdiff_newmode(const char *line, struct patch *patch)
284 patch->new_mode = strtoul(line, NULL, 8);
288 static int gitdiff_delete(const char *line, struct patch *patch)
290 patch->is_delete = 1;
291 patch->old_name = patch->def_name;
292 return gitdiff_oldmode(line, patch);
295 static int gitdiff_newfile(const char *line, struct patch *patch)
298 patch->new_name = patch->def_name;
299 return gitdiff_newmode(line, patch);
302 static int gitdiff_copysrc(const char *line, struct patch *patch)
305 patch->old_name = find_name(line, NULL, 0, 0);
309 static int gitdiff_copydst(const char *line, struct patch *patch)
312 patch->new_name = find_name(line, NULL, 0, 0);
316 static int gitdiff_renamesrc(const char *line, struct patch *patch)
318 patch->is_rename = 1;
319 patch->old_name = find_name(line, NULL, 0, 0);
323 static int gitdiff_renamedst(const char *line, struct patch *patch)
325 patch->is_rename = 1;
326 patch->new_name = find_name(line, NULL, 0, 0);
330 static int gitdiff_similarity(const char *line, struct patch *patch)
335 static int gitdiff_dissimilarity(const char *line, struct patch *patch)
341 * This is normal for a diff that doesn't change anything: we'll fall through
342 * into the next diff. Tell the parser to break out.
344 static int gitdiff_unrecognized(const char *line, struct patch *patch)
349 static char *git_header_name(char *line)
367 * We don't accept absolute paths (/dev/null) as possibly valid
373 * Accept a name only if it shows up twice, exactly the same
376 for (len = 0 ; ; len++) {
393 if (second[len] == '\n' && !memcmp(name, second, len)) {
394 char *ret = xmalloc(len + 1);
395 memcpy(ret, name, len);
404 /* Verify that we recognize the lines following a git header */
405 static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
407 unsigned long offset;
409 /* A git diff has explicit new/delete information, so we don't guess */
411 patch->is_delete = 0;
414 * Some things may not have the old name in the
415 * rest of the headers anywhere (pure mode changes,
416 * or removing or adding empty files), so we get
417 * the default name from the header.
419 patch->def_name = git_header_name(line + strlen("diff --git "));
424 for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
425 static const struct opentry {
427 int (*fn)(const char *, struct patch *);
429 { "@@ -", gitdiff_hdrend },
430 { "--- ", gitdiff_oldname },
431 { "+++ ", gitdiff_newname },
432 { "old mode ", gitdiff_oldmode },
433 { "new mode ", gitdiff_newmode },
434 { "deleted file mode ", gitdiff_delete },
435 { "new file mode ", gitdiff_newfile },
436 { "copy from ", gitdiff_copysrc },
437 { "copy to ", gitdiff_copydst },
438 { "rename old ", gitdiff_renamesrc },
439 { "rename new ", gitdiff_renamedst },
440 { "similarity index ", gitdiff_similarity },
441 { "dissimilarity index ", gitdiff_dissimilarity },
442 { "", gitdiff_unrecognized },
446 len = linelen(line, size);
447 if (!len || line[len-1] != '\n')
449 for (i = 0; i < sizeof(optable) / sizeof(optable[0]); i++) {
450 const struct opentry *p = optable + i;
451 int oplen = strlen(p->str);
452 if (len < oplen || memcmp(p->str, line, oplen))
454 if (p->fn(line + oplen, patch) < 0)
463 static int parse_num(const char *line, unsigned long *p)
469 *p = strtoul(line, &ptr, 10);
473 static int parse_range(const char *line, int len, int offset, const char *expect,
474 unsigned long *p1, unsigned long *p2)
478 if (offset < 0 || offset >= len)
483 digits = parse_num(line, p1);
493 digits = parse_num(line+1, p2);
505 if (memcmp(line, expect, ex))
512 * Parse a unified diff fragment header of the
513 * form "@@ -a,b +c,d @@"
515 static int parse_fragment_header(char *line, int len, struct fragment *fragment)
519 if (!len || line[len-1] != '\n')
522 /* Figure out the number of lines in a fragment */
523 offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
524 offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
529 static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
531 unsigned long offset, len;
533 patch->is_rename = patch->is_copy = 0;
534 patch->is_new = patch->is_delete = -1;
535 patch->old_mode = patch->new_mode = 0;
536 patch->old_name = patch->new_name = NULL;
537 for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
538 unsigned long nextlen;
540 len = linelen(line, size);
544 /* Testing this early allows us to take a few shortcuts.. */
549 * Make sure we don't find any unconnected patch fragmants.
550 * That's a sign that we didn't find a header, and that a
551 * patch has become corrupted/broken up.
553 if (!memcmp("@@ -", line, 4)) {
554 struct fragment dummy;
555 if (parse_fragment_header(line, len, &dummy) < 0)
557 error("patch fragment without header at line %d: %.*s", linenr, len-1, line);
564 * Git patch? It might not have a real patch, just a rename
565 * or mode change, so we handle that specially
567 if (!memcmp("diff --git ", line, 11)) {
568 int git_hdr_len = parse_git_header(line, len, size, patch);
571 if (!patch->old_name && !patch->new_name)
572 die("git diff header lacks filename information (line %d)", linenr);
573 *hdrsize = git_hdr_len;
577 /** --- followed by +++ ? */
578 if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
582 * We only accept unified patches, so we want it to
583 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
586 nextlen = linelen(line + len, size - len);
587 if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
590 /* Ok, we'll consider it a patch */
591 parse_traditional_patch(line, line+len, patch);
592 *hdrsize = len + nextlen;
600 * Parse a unified diff. Note that this really needs
601 * to parse each fragment separately, since the only
602 * way to know the difference between a "---" that is
603 * part of a patch, and a "---" that starts the next
604 * patch is to look at the line counts..
606 static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
609 int len = linelen(line, size), offset;
610 unsigned long oldlines, newlines;
612 offset = parse_fragment_header(line, len, fragment);
615 oldlines = fragment->oldlines;
616 newlines = fragment->newlines;
618 if (patch->is_new < 0) {
619 patch->is_new = !oldlines;
621 patch->old_name = NULL;
623 if (patch->is_delete < 0) {
624 patch->is_delete = !newlines;
626 patch->new_name = NULL;
629 if (patch->is_new != !oldlines)
630 return error("new file depends on old contents");
631 if (patch->is_delete != !newlines)
632 return error("deleted file still has contents");
634 /* Parse the thing.. */
639 for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) {
640 if (!oldlines && !newlines)
642 len = linelen(line, size);
643 if (!len || line[len-1] != '\n')
660 /* We allow "\ No newline at end of file" */
662 if (len < 12 || memcmp(line, "\\ No newline", 12))
667 patch->lines_added += added;
668 patch->lines_deleted += deleted;
672 static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
674 unsigned long offset = 0;
675 struct fragment **fragp = &patch->fragments;
677 while (size > 4 && !memcmp(line, "@@ -", 4)) {
678 struct fragment *fragment;
681 fragment = xmalloc(sizeof(*fragment));
682 memset(fragment, 0, sizeof(*fragment));
683 len = parse_fragment(line, size, patch, fragment);
685 die("corrupt patch at line %d", linenr);
687 fragment->patch = line;
688 fragment->size = len;
691 fragp = &fragment->next;
700 static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
702 int hdrsize, patchsize;
703 int offset = find_header(buffer, size, &hdrsize, patch);
708 patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
710 return offset + hdrsize + patchsize;
713 const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
714 const char minuses[]= "----------------------------------------------------------------------";
716 static void show_stats(struct patch *patch)
718 char *name = patch->old_name;
719 int len, max, add, del, total;
722 name = patch->new_name;
725 * "scale" the filename
736 * scale the add/delete
742 add = patch->lines_added;
743 del = patch->lines_deleted;
746 total = (total * max + max_change / 2) / max_change;
747 add = (add * max + max_change / 2) / max_change;
749 printf(" %-*s |%5d %.*s%.*s\n",
750 len, name, patch->lines_added + patch->lines_deleted,
751 add, pluses, del, minuses);
754 static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
759 switch (st->st_mode & S_IFMT) {
761 return readlink(path, buf, size);
763 fd = open(path, O_RDONLY);
765 return error("unable to open %s", path);
768 int ret = read(fd, buf + got, size - got);
786 static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line)
789 unsigned long start, backwards, forwards;
796 unsigned long offset = 0;
798 while (offset + fragsize <= size) {
799 if (buf[offset++] == '\n') {
807 /* Exact line number? */
808 if (!memcmp(buf + start, fragment, fragsize))
812 * There's probably some smart way to do this, but I'll leave
813 * that to the smart and beautiful people. I'm simple and stupid.
824 if (forwards + fragsize > size)
830 } while (backwards && buf[backwards-1] != '\n');
833 while (forwards + fragsize <= size) {
834 if (buf[forwards++] == '\n')
840 if (try + fragsize > size)
842 if (memcmp(buf + try, fragment, fragsize))
847 fprintf(stderr, "Fragment applied at offset %d\n", n);
852 * We should start searching forward and backward.
863 static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
865 char *buf = desc->buffer;
866 const char *patch = frag->patch;
867 int offset, size = frag->size;
868 char *old = xmalloc(size);
869 char *new = xmalloc(size);
870 int oldsize = 0, newsize = 0;
873 int len = linelen(patch, size);
880 * "plen" is how much of the line we should use for
881 * the actual patch data. Normally we just remove the
882 * first character on the line, but if the line is
883 * followed by "\ No newline", then we also remove the
884 * last one (which is the newline, of course).
887 if (len > size && patch[len] == '\\')
892 memcpy(old + oldsize, patch + 1, plen);
896 /* Fall-through for ' ' */
898 memcpy(new + newsize, patch + 1, plen);
902 /* Ignore it, we already handled it */
911 offset = find_offset(buf, desc->size, old, oldsize, frag->newpos);
913 int diff = newsize - oldsize;
914 unsigned long size = desc->size + diff;
915 unsigned long alloc = desc->alloc;
920 buf = xrealloc(buf, alloc);
924 memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize);
925 memcpy(buf + offset, new, newsize);
934 static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
936 struct fragment *frag = patch->fragments;
939 if (apply_one_fragment(desc, frag) < 0)
940 return error("patch failed: %s:%d", patch->old_name, frag->oldpos);
946 static int apply_data(struct patch *patch, struct stat *st)
949 unsigned long size, alloc;
950 struct buffer_desc desc;
955 if (patch->old_name) {
958 buf = xmalloc(alloc);
959 if (read_old_data(st, patch->old_name, buf, alloc) != size)
960 return error("read of %s failed", patch->old_name);
966 if (apply_fragments(&desc, patch) < 0)
968 patch->result = desc.buffer;
969 patch->resultsize = desc.size;
971 if (patch->is_delete && patch->resultsize)
972 return error("removal patch leaves file contents");
977 static int check_patch(struct patch *patch)
980 const char *old_name = patch->old_name;
981 const char *new_name = patch->new_name;
986 if (lstat(old_name, &st) < 0)
987 return error("%s: %s\n", strerror(errno));
989 int pos = cache_name_pos(old_name, strlen(old_name));
991 return error("%s: does not exist in index", old_name);
992 changed = ce_match_stat(active_cache[pos], &st);
994 return error("%s: does not match index", old_name);
996 if (patch->is_new < 0)
998 if (!patch->old_mode)
999 patch->old_mode = st.st_mode;
1000 if ((st.st_mode ^ patch->old_mode) & S_IFMT)
1001 return error("%s: wrong type", old_name);
1002 if (st.st_mode != patch->old_mode)
1003 fprintf(stderr, "warning: %s has type %o, expected %o\n",
1004 old_name, st.st_mode, patch->old_mode);
1007 if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
1008 if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0)
1009 return error("%s: already exists in index", new_name);
1010 if (!lstat(new_name, &st))
1011 return error("%s: already exists in working directory", new_name);
1012 if (errno != ENOENT)
1013 return error("%s: %s", new_name, strerror(errno));
1014 if (!patch->new_mode)
1015 patch->new_mode = S_IFREG | 0644;
1018 if (new_name && old_name) {
1019 int same = !strcmp(old_name, new_name);
1020 if (!patch->new_mode)
1021 patch->new_mode = patch->old_mode;
1022 if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
1023 return error("new mode (%o) of %s does not match old mode (%o)%s%s",
1024 patch->new_mode, new_name, patch->old_mode,
1025 same ? "" : " of ", same ? "" : old_name);
1028 if (apply_data(patch, &st) < 0)
1029 return error("%s: patch does not apply", old_name);
1033 static int check_patch_list(struct patch *patch)
1037 for (;patch ; patch = patch->next)
1038 error |= check_patch(patch);
1042 static void show_file(int c, unsigned int mode, const char *name)
1044 printf("%c %o %s\n", c, mode, name);
1047 static void show_file_list(struct patch *patch)
1049 for (;patch ; patch = patch->next) {
1050 if (patch->is_rename) {
1051 show_file('-', patch->old_mode, patch->old_name);
1052 show_file('+', patch->new_mode, patch->new_name);
1055 if (patch->is_copy || patch->is_new) {
1056 show_file('+', patch->new_mode, patch->new_name);
1059 if (patch->is_delete) {
1060 show_file('-', patch->old_mode, patch->old_name);
1063 if (patch->old_mode && patch->new_mode && patch->old_mode != patch->new_mode) {
1064 printf("M %o:%o %s\n", patch->old_mode, patch->new_mode, patch->old_name);
1067 printf("M %o %s\n", patch->old_mode, patch->old_name);
1071 static void stat_patch_list(struct patch *patch)
1073 int files, adds, dels;
1075 for (files = adds = dels = 0 ; patch ; patch = patch->next) {
1077 adds += patch->lines_added;
1078 dels += patch->lines_deleted;
1082 printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
1085 static void patch_stats(struct patch *patch)
1087 int lines = patch->lines_added + patch->lines_deleted;
1089 if (lines > max_change)
1091 if (patch->old_name) {
1092 int len = strlen(patch->old_name);
1096 if (patch->new_name) {
1097 int len = strlen(patch->new_name);
1103 static void remove_file(struct patch *patch)
1106 if (remove_file_from_cache(patch->old_name) < 0)
1107 die("unable to remove %s from index", patch->old_name);
1109 unlink(patch->old_name);
1112 static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
1115 struct cache_entry *ce;
1116 int namelen = strlen(path);
1117 unsigned ce_size = cache_entry_size(namelen);
1122 ce = xmalloc(ce_size);
1123 memset(ce, 0, ce_size);
1124 memcpy(ce->name, path, namelen);
1125 ce->ce_mode = create_ce_mode(mode);
1126 ce->ce_flags = htons(namelen);
1127 if (lstat(path, &st) < 0)
1128 die("unable to stat newly created file %s", path);
1129 fill_stat_cache_info(ce, &st);
1130 if (write_sha1_file(buf, size, "blob", ce->sha1) < 0)
1131 die("unable to create backing store for newly created file %s", path);
1132 if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
1133 die("unable to add cache entry for %s", path);
1136 static void create_file(struct patch *patch)
1138 const char *path = patch->new_name;
1139 unsigned mode = patch->new_mode;
1140 unsigned long size = patch->resultsize;
1141 char *buf = patch->result;
1144 mode = S_IFREG | 0644;
1145 if (S_ISREG(mode)) {
1147 mode = (mode & 0100) ? 0777 : 0666;
1148 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
1150 die("unable to create file %s (%s)", path, strerror(errno));
1151 if (write(fd, buf, size) != size)
1152 die("unable to write file %s", path);
1154 add_index_file(path, mode, buf, size);
1157 if (S_ISLNK(mode)) {
1158 if (size && buf[size-1] == '\n')
1161 if (symlink(buf, path) < 0)
1162 die("unable to write symlink %s", path);
1163 add_index_file(path, mode, buf, size);
1166 die("unable to write file mode %o", mode);
1169 static void write_out_one_result(struct patch *patch)
1171 if (patch->is_delete > 0) {
1175 if (patch->is_new > 0 || patch->is_copy) {
1180 * Rename or modification boils down to the same
1181 * thing: remove the old, write the new
1187 static void write_out_results(struct patch *list)
1193 write_out_one_result(list);
1198 static struct cache_file cache_file;
1200 static int apply_patch(int fd)
1203 unsigned long offset, size;
1204 char *buffer = read_patch_file(fd, &size);
1205 struct patch *list = NULL, **listp = &list;
1211 struct patch *patch;
1214 patch = xmalloc(sizeof(*patch));
1215 memset(patch, 0, sizeof(*patch));
1216 nr = parse_chunk(buffer + offset, size, patch);
1221 listp = &patch->next;
1227 write_index = check_index && apply;
1229 newfd = hold_index_file_for_update(&cache_file, get_index_file());
1231 if (read_cache() < 0)
1232 die("unable to read index file");
1235 if ((check || apply) && check_patch_list(list) < 0)
1239 write_out_results(list);
1242 if (write_cache(newfd, active_cache, active_nr) ||
1243 commit_index_file(&cache_file))
1244 die("Unable to write new cachefile");
1248 show_file_list(list);
1251 stat_patch_list(list);
1257 int main(int argc, char **argv)
1262 for (i = 1; i < argc; i++) {
1263 const char *arg = argv[i];
1266 if (!strcmp(arg, "-")) {
1271 if (!strcmp(arg, "--no-merge")) {
1275 if (!strcmp(arg, "--stat")) {
1280 if (!strcmp(arg, "--check")) {
1285 if (!strcmp(arg, "--index")) {
1289 if (!strcmp(arg, "--show-files")) {
1293 fd = open(arg, O_RDONLY);