6 static void create_directories(const char *path
, int path_len
,
7 const struct checkout
*state
)
9 char *buf
= xmalloc(path_len
+ 1);
12 while (len
< path_len
) {
16 } while (len
< path_len
&& path
[len
] != '/');
22 * For 'checkout-index --prefix=<dir>', <dir> is
23 * allowed to be a symlink to an existing directory,
24 * and we set 'state->base_dir_len' below, such that
25 * we test the path components of the prefix with the
26 * stat() function instead of the lstat() function.
28 if (has_dirs_only_path(buf
, len
, state
->base_dir_len
))
29 continue; /* ok, it is already a directory. */
32 * If this mkdir() would fail, it could be that there
33 * is already a symlink or something else exists
34 * there, therefore we then try to unlink it and try
35 * one more time to create the directory.
37 if (mkdir(buf
, 0777)) {
38 if (errno
== EEXIST
&& state
->force
&&
39 !unlink_or_warn(buf
) && !mkdir(buf
, 0777))
41 die_errno("cannot create directory at '%s'", buf
);
47 static void remove_subtree(const char *path
)
49 DIR *dir
= opendir(path
);
51 char pathbuf
[PATH_MAX
];
55 die_errno("cannot opendir '%s'", path
);
56 strcpy(pathbuf
, path
);
57 name
= pathbuf
+ strlen(path
);
59 while ((de
= readdir(dir
)) != NULL
) {
61 if (is_dot_or_dotdot(de
->d_name
))
63 strcpy(name
, de
->d_name
);
64 if (lstat(pathbuf
, &st
))
65 die_errno("cannot lstat '%s'", pathbuf
);
66 if (S_ISDIR(st
.st_mode
))
67 remove_subtree(pathbuf
);
68 else if (unlink(pathbuf
))
69 die_errno("cannot unlink '%s'", pathbuf
);
73 die_errno("cannot rmdir '%s'", path
);
76 static int create_file(const char *path
, unsigned int mode
)
78 mode
= (mode
& 0100) ? 0777 : 0666;
79 return open(path
, O_WRONLY
| O_CREAT
| O_EXCL
, mode
);
82 static void *read_blob_entry(struct cache_entry
*ce
, unsigned long *size
)
84 enum object_type type
;
85 void *new = read_sha1_file(ce
->sha1
, &type
, size
);
95 static int open_output_fd(char *path
, struct cache_entry
*ce
, int to_tempfile
)
97 int symlink
= (ce
->ce_mode
& S_IFMT
) != S_IFREG
;
100 ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
101 return mkstemp(path
);
103 return create_file(path
, !symlink
? ce
->ce_mode
: 0666);
107 static int fstat_output(int fd
, const struct checkout
*state
, struct stat
*st
)
109 /* use fstat() only when path == ce->name */
110 if (fstat_is_reliable() &&
111 state
->refresh_cache
&& !state
->base_dir_len
) {
118 static int streaming_write_entry(struct cache_entry
*ce
, char *path
,
119 const struct checkout
*state
, int to_tempfile
,
120 int *fstat_done
, struct stat
*statbuf
)
122 struct git_istream
*st
;
123 enum object_type type
;
128 st
= open_istream(ce
->sha1
, &type
, &sz
);
131 if (type
!= OBJ_BLOB
)
134 fd
= open_output_fd(path
, ce
, to_tempfile
);
141 ssize_t readlen
= read_istream(st
, buf
, sizeof(buf
));
146 wrote
= write_in_full(fd
, buf
, readlen
);
148 if (wrote
!= readlen
)
151 *fstat_done
= fstat_output(fd
, state
, statbuf
);
157 if (result
&& 0 <= fd
)
162 static int write_entry(struct cache_entry
*ce
, char *path
, const struct checkout
*state
, int to_tempfile
)
164 unsigned int ce_mode_s_ifmt
= ce
->ce_mode
& S_IFMT
;
165 int fd
, ret
, fstat_done
= 0;
167 struct strbuf buf
= STRBUF_INIT
;
169 size_t wrote
, newsize
= 0;
172 if ((ce_mode_s_ifmt
== S_IFREG
) &&
173 can_bypass_conversion(path
) &&
174 !streaming_write_entry(ce
, path
, state
, to_tempfile
,
178 switch (ce_mode_s_ifmt
) {
181 new = read_blob_entry(ce
, &size
);
183 return error("unable to read sha1 file of %s (%s)",
184 path
, sha1_to_hex(ce
->sha1
));
186 if (ce_mode_s_ifmt
== S_IFLNK
&& has_symlinks
&& !to_tempfile
) {
187 ret
= symlink(new, path
);
190 return error("unable to create symlink %s (%s)",
191 path
, strerror(errno
));
196 * Convert from git internal format to working tree format
198 if (ce_mode_s_ifmt
== S_IFREG
&&
199 convert_to_working_tree(ce
->name
, new, size
, &buf
)) {
201 new = strbuf_detach(&buf
, &newsize
);
205 fd
= open_output_fd(path
, ce
, to_tempfile
);
208 return error("unable to create file %s (%s)",
209 path
, strerror(errno
));
212 wrote
= write_in_full(fd
, new, size
);
214 fstat_done
= fstat_output(fd
, state
, &st
);
218 return error("unable to write file %s", path
);
222 return error("cannot create temporary subproject %s", path
);
223 if (mkdir(path
, 0777) < 0)
224 return error("cannot create subproject directory %s", path
);
227 return error("unknown file mode for %s in index", path
);
231 if (state
->refresh_cache
) {
233 lstat(ce
->name
, &st
);
234 fill_stat_cache_info(ce
, &st
);
240 * This is like 'lstat()', except it refuses to follow symlinks
241 * in the path, after skipping "skiplen".
243 static int check_path(const char *path
, int len
, struct stat
*st
, int skiplen
)
245 const char *slash
= path
+ len
;
247 while (path
< slash
&& *slash
!= '/')
249 if (!has_dirs_only_path(path
, slash
- path
, skiplen
)) {
253 return lstat(path
, st
);
256 int checkout_entry(struct cache_entry
*ce
, const struct checkout
*state
, char *topath
)
258 static char path
[PATH_MAX
+ 1];
260 int len
= state
->base_dir_len
;
263 return write_entry(ce
, topath
, state
, 1);
265 memcpy(path
, state
->base_dir
, len
);
266 strcpy(path
+ len
, ce
->name
);
267 len
+= ce_namelen(ce
);
269 if (!check_path(path
, len
, &st
, state
->base_dir_len
)) {
270 unsigned changed
= ce_match_stat(ce
, &st
, CE_MATCH_IGNORE_VALID
|CE_MATCH_IGNORE_SKIP_WORKTREE
);
275 fprintf(stderr
, "%s already exists, no checkout\n", path
);
280 * We unlink the old file, to get the new one with the
281 * right permissions (including umask, which is nasty
282 * to emulate by hand - much easier to let the system
283 * just do the right thing)
285 if (S_ISDIR(st
.st_mode
)) {
286 /* If it is a gitlink, leave it alone! */
287 if (S_ISGITLINK(ce
->ce_mode
))
290 return error("%s is a directory", path
);
291 remove_subtree(path
);
292 } else if (unlink(path
))
293 return error("unable to unlink old '%s' (%s)", path
, strerror(errno
));
294 } else if (state
->not_new
)
296 create_directories(path
, len
, state
);
297 return write_entry(ce
, path
, state
, 0);