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Commit | Line | Data |
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12dccc16 | 1 | #include "cache.h" |
8e440259 | 2 | #include "blob.h" |
8ca12c0d | 3 | #include "dir.h" |
12dccc16 | 4 | |
81a9aa60 KB |
5 | static void create_directories(const char *path, int path_len, |
6 | const struct checkout *state) | |
12dccc16 | 7 | { |
81a9aa60 KB |
8 | char *buf = xmalloc(path_len + 1); |
9 | int len = 0; | |
10 | ||
11 | while (len < path_len) { | |
12 | do { | |
13 | buf[len] = path[len]; | |
14 | len++; | |
15 | } while (len < path_len && path[len] != '/'); | |
16 | if (len >= path_len) | |
17 | break; | |
12dccc16 | 18 | buf[len] = 0; |
fa2e71c9 | 19 | |
bad4a54f KB |
20 | /* |
21 | * For 'checkout-index --prefix=<dir>', <dir> is | |
22 | * allowed to be a symlink to an existing directory, | |
23 | * and we set 'state->base_dir_len' below, such that | |
24 | * we test the path components of the prefix with the | |
25 | * stat() function instead of the lstat() function. | |
26 | */ | |
57199892 | 27 | if (has_dirs_only_path(buf, len, state->base_dir_len)) |
fa2e71c9 JH |
28 | continue; /* ok, it is already a directory. */ |
29 | ||
30 | /* | |
bad4a54f KB |
31 | * If this mkdir() would fail, it could be that there |
32 | * is already a symlink or something else exists | |
33 | * there, therefore we then try to unlink it and try | |
34 | * one more time to create the directory. | |
fa2e71c9 | 35 | */ |
f312de01 | 36 | if (mkdir(buf, 0777)) { |
fa2e71c9 | 37 | if (errno == EEXIST && state->force && |
691f1a28 | 38 | !unlink_or_warn(buf) && !mkdir(buf, 0777)) |
fa2e71c9 | 39 | continue; |
0721c314 | 40 | die_errno("cannot create directory at '%s'", buf); |
12dccc16 LT |
41 | } |
42 | } | |
43 | free(buf); | |
44 | } | |
45 | ||
46 | static void remove_subtree(const char *path) | |
47 | { | |
48 | DIR *dir = opendir(path); | |
49 | struct dirent *de; | |
50 | char pathbuf[PATH_MAX]; | |
51 | char *name; | |
a6080a0a | 52 | |
12dccc16 | 53 | if (!dir) |
d824cbba | 54 | die_errno("cannot opendir '%s'", path); |
12dccc16 LT |
55 | strcpy(pathbuf, path); |
56 | name = pathbuf + strlen(path); | |
57 | *name++ = '/'; | |
58 | while ((de = readdir(dir)) != NULL) { | |
59 | struct stat st; | |
8ca12c0d | 60 | if (is_dot_or_dotdot(de->d_name)) |
12dccc16 LT |
61 | continue; |
62 | strcpy(name, de->d_name); | |
63 | if (lstat(pathbuf, &st)) | |
d824cbba | 64 | die_errno("cannot lstat '%s'", pathbuf); |
12dccc16 LT |
65 | if (S_ISDIR(st.st_mode)) |
66 | remove_subtree(pathbuf); | |
67 | else if (unlink(pathbuf)) | |
d824cbba | 68 | die_errno("cannot unlink '%s'", pathbuf); |
12dccc16 LT |
69 | } |
70 | closedir(dir); | |
71 | if (rmdir(path)) | |
d824cbba | 72 | die_errno("cannot rmdir '%s'", path); |
12dccc16 LT |
73 | } |
74 | ||
d48a72f3 | 75 | static int create_file(const char *path, unsigned int mode) |
12dccc16 | 76 | { |
12dccc16 | 77 | mode = (mode & 0100) ? 0777 : 0666; |
781411ed | 78 | return open(path, O_WRONLY | O_CREAT | O_EXCL, mode); |
12dccc16 LT |
79 | } |
80 | ||
4857c761 | 81 | static void *read_blob_entry(struct cache_entry *ce, unsigned long *size) |
f0807e62 LT |
82 | { |
83 | enum object_type type; | |
84 | void *new = read_sha1_file(ce->sha1, &type, size); | |
85 | ||
86 | if (new) { | |
87 | if (type == OBJ_BLOB) | |
88 | return new; | |
89 | free(new); | |
90 | } | |
91 | return NULL; | |
92 | } | |
93 | ||
efbc5831 | 94 | static int write_entry(struct cache_entry *ce, char *path, const struct checkout *state, int to_tempfile) |
12dccc16 | 95 | { |
4857c761 | 96 | unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT; |
e4c72923 | 97 | int fd, ret, fstat_done = 0; |
4857c761 KB |
98 | char *new; |
99 | struct strbuf buf = STRBUF_INIT; | |
100 | unsigned long size; | |
101 | size_t wrote, newsize = 0; | |
e4c72923 | 102 | struct stat st; |
4857c761 KB |
103 | |
104 | switch (ce_mode_s_ifmt) { | |
12dccc16 | 105 | case S_IFREG: |
4857c761 KB |
106 | case S_IFLNK: |
107 | new = read_blob_entry(ce, &size); | |
f0807e62 | 108 | if (!new) |
7e44c935 | 109 | return error("git checkout-index: unable to read sha1 file of %s (%s)", |
f0807e62 | 110 | path, sha1_to_hex(ce->sha1)); |
1a9d7e9b | 111 | |
4857c761 KB |
112 | if (ce_mode_s_ifmt == S_IFLNK && has_symlinks && !to_tempfile) { |
113 | ret = symlink(new, path); | |
114 | free(new); | |
115 | if (ret) | |
116 | return error("git checkout-index: unable to create symlink %s (%s)", | |
117 | path, strerror(errno)); | |
118 | break; | |
119 | } | |
120 | ||
1a9d7e9b JH |
121 | /* |
122 | * Convert from git internal format to working tree format | |
123 | */ | |
4857c761 KB |
124 | if (ce_mode_s_ifmt == S_IFREG && |
125 | convert_to_working_tree(ce->name, new, size, &buf)) { | |
1a9d7e9b | 126 | free(new); |
c32f749f RS |
127 | new = strbuf_detach(&buf, &newsize); |
128 | size = newsize; | |
1a9d7e9b JH |
129 | } |
130 | ||
de84f99c | 131 | if (to_tempfile) { |
4857c761 KB |
132 | if (ce_mode_s_ifmt == S_IFREG) |
133 | strcpy(path, ".merge_file_XXXXXX"); | |
134 | else | |
135 | strcpy(path, ".merge_link_XXXXXX"); | |
de84f99c | 136 | fd = mkstemp(path); |
4857c761 | 137 | } else if (ce_mode_s_ifmt == S_IFREG) { |
7a51ed66 | 138 | fd = create_file(path, ce->ce_mode); |
4857c761 KB |
139 | } else { |
140 | fd = create_file(path, 0666); | |
141 | } | |
12dccc16 LT |
142 | if (fd < 0) { |
143 | free(new); | |
7e44c935 | 144 | return error("git checkout-index: unable to create file %s (%s)", |
12dccc16 LT |
145 | path, strerror(errno)); |
146 | } | |
6c510bee | 147 | |
93822c22 | 148 | wrote = write_in_full(fd, new, size); |
e4c72923 | 149 | /* use fstat() only when path == ce->name */ |
34779c53 JS |
150 | if (fstat_is_reliable() && |
151 | state->refresh_cache && !to_tempfile && !state->base_dir_len) { | |
e4c72923 KB |
152 | fstat(fd, &st); |
153 | fstat_done = 1; | |
154 | } | |
12dccc16 LT |
155 | close(fd); |
156 | free(new); | |
157 | if (wrote != size) | |
7e44c935 | 158 | return error("git checkout-index: unable to write file %s", path); |
12dccc16 | 159 | break; |
302b9282 | 160 | case S_IFGITLINK: |
f0807e62 | 161 | if (to_tempfile) |
7e44c935 | 162 | return error("git checkout-index: cannot create temporary subproject %s", path); |
f0807e62 | 163 | if (mkdir(path, 0777) < 0) |
7e44c935 | 164 | return error("git checkout-index: cannot create subproject directory %s", path); |
f0807e62 | 165 | break; |
12dccc16 | 166 | default: |
7e44c935 | 167 | return error("git checkout-index: unknown file mode for %s", path); |
12dccc16 LT |
168 | } |
169 | ||
6ee67f26 | 170 | if (state->refresh_cache) { |
e4c72923 KB |
171 | if (!fstat_done) |
172 | lstat(ce->name, &st); | |
12dccc16 LT |
173 | fill_stat_cache_info(ce, &st); |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
b6986d8a LT |
178 | /* |
179 | * This is like 'lstat()', except it refuses to follow symlinks | |
da02ca50 | 180 | * in the path, after skipping "skiplen". |
b6986d8a | 181 | */ |
61b97df7 | 182 | static int check_path(const char *path, int len, struct stat *st, int skiplen) |
b6986d8a | 183 | { |
da02ca50 JH |
184 | const char *slash = path + len; |
185 | ||
186 | while (path < slash && *slash != '/') | |
187 | slash--; | |
188 | if (!has_dirs_only_path(path, slash - path, skiplen)) { | |
b6986d8a LT |
189 | errno = ENOENT; |
190 | return -1; | |
191 | } | |
192 | return lstat(path, st); | |
193 | } | |
194 | ||
efbc5831 | 195 | int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath) |
12dccc16 | 196 | { |
095c424d | 197 | static char path[PATH_MAX + 1]; |
de84f99c | 198 | struct stat st; |
12dccc16 LT |
199 | int len = state->base_dir_len; |
200 | ||
de84f99c SP |
201 | if (topath) |
202 | return write_entry(ce, topath, state, 1); | |
203 | ||
12dccc16 LT |
204 | memcpy(path, state->base_dir, len); |
205 | strcpy(path + len, ce->name); | |
81a9aa60 | 206 | len += ce_namelen(ce); |
12dccc16 | 207 | |
da02ca50 | 208 | if (!check_path(path, len, &st, state->base_dir_len)) { |
56cac48c | 209 | unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
12dccc16 LT |
210 | if (!changed) |
211 | return 0; | |
212 | if (!state->force) { | |
213 | if (!state->quiet) | |
215a7ad1 | 214 | fprintf(stderr, "git-checkout-index: %s already exists\n", path); |
4b12dae6 | 215 | return -1; |
12dccc16 LT |
216 | } |
217 | ||
218 | /* | |
219 | * We unlink the old file, to get the new one with the | |
220 | * right permissions (including umask, which is nasty | |
221 | * to emulate by hand - much easier to let the system | |
222 | * just do the right thing) | |
223 | */ | |
d48a72f3 | 224 | if (S_ISDIR(st.st_mode)) { |
f0807e62 | 225 | /* If it is a gitlink, leave it alone! */ |
7a51ed66 | 226 | if (S_ISGITLINK(ce->ce_mode)) |
f0807e62 | 227 | return 0; |
d48a72f3 LT |
228 | if (!state->force) |
229 | return error("%s is a directory", path); | |
230 | remove_subtree(path); | |
971f229c LT |
231 | } else if (unlink(path)) |
232 | return error("unable to unlink old '%s' (%s)", path, strerror(errno)); | |
de84f99c | 233 | } else if (state->not_new) |
12dccc16 | 234 | return 0; |
81a9aa60 | 235 | create_directories(path, len, state); |
de84f99c | 236 | return write_entry(ce, path, state, 0); |
12dccc16 | 237 | } |