]>
git.ipfire.org Git - thirdparty/git.git/blob - receive-pack.c
5 static const char receive_pack_usage
[] = "git-receive-pack [--unpack=executable] <git-dir> [heads]";
7 static const char *unpacker
= "git-unpack-objects";
9 static int path_match(const char *path
, int nr
, char **match
)
12 int pathlen
= strlen(path
);
14 for (i
= 0; i
< nr
; i
++) {
18 if (!len
|| len
> pathlen
)
20 if (memcmp(path
+ pathlen
- len
, s
, len
))
22 if (pathlen
> len
&& path
[pathlen
- len
- 1] != '/')
30 static void show_ref(const char *path
, unsigned char *sha1
)
32 packet_write(1, "%s %s\n", sha1_to_hex(sha1
), path
);
35 static int read_ref(const char *path
, unsigned char *sha1
)
38 int fd
= open(path
, O_RDONLY
);
42 if (read(fd
, buffer
, sizeof(buffer
)) >= 40)
43 ret
= get_sha1_hex(buffer
, sha1
);
49 static void write_head_info(const char *base
, int nr
, char **match
)
51 DIR *dir
= opendir(base
);
55 int baselen
= strlen(base
);
56 char *path
= xmalloc(baselen
+ 257);
57 memcpy(path
, base
, baselen
);
59 while ((de
= readdir(dir
)) != NULL
) {
64 if (de
->d_name
[0] == '.')
66 namelen
= strlen(de
->d_name
);
69 memcpy(path
+ baselen
, de
->d_name
, namelen
+1);
70 if (lstat(path
, &st
) < 0)
72 if (S_ISDIR(st
.st_mode
)) {
73 path
[baselen
+ namelen
] = '/';
74 path
[baselen
+ namelen
+ 1] = 0;
75 write_head_info(path
, nr
, match
);
78 if (read_ref(path
, sha1
) < 0)
80 if (!has_sha1_file(sha1
))
82 if (nr
&& !path_match(path
, nr
, match
))
93 unsigned char old_sha1
[20];
94 unsigned char new_sha1
[20];
98 struct command
*commands
= NULL
;
100 static int is_all_zeroes(const char *hex
)
103 for (i
= 0; i
< 40; i
++)
109 static int verify_old_ref(const char *name
, char *hex_contents
)
114 if (is_all_zeroes(hex_contents
))
116 fd
= open(name
, O_RDONLY
);
119 ret
= read(fd
, buffer
, 40);
123 if (memcmp(buffer
, hex_contents
, 40))
128 static void update(const char *name
, unsigned char *old_sha1
, unsigned char *new_sha1
)
130 char new_hex
[60], *old_hex
, *lock_name
;
131 int newfd
, namelen
, written
;
133 namelen
= strlen(name
);
134 lock_name
= xmalloc(namelen
+ 10);
135 memcpy(lock_name
, name
, namelen
);
136 memcpy(lock_name
+ namelen
, ".lock", 6);
138 strcpy(new_hex
, sha1_to_hex(new_sha1
));
139 old_hex
= sha1_to_hex(old_sha1
);
140 if (!has_sha1_file(new_sha1
))
141 die("unpack should have generated %s, but I can't find it!", new_hex
);
143 newfd
= open(lock_name
, O_CREAT
| O_EXCL
| O_WRONLY
, 0644);
145 die("unable to create %s (%s)", lock_name
, strerror(errno
));
147 /* Write the ref with an ending '\n' */
150 written
= write(newfd
, new_hex
, 41);
151 /* Remove the '\n' again */
157 die("unable to write %s", lock_name
);
159 if (verify_old_ref(name
, old_hex
) < 0) {
161 die("%s changed during push", name
);
163 if (rename(lock_name
, name
) < 0) {
165 die("unable to replace %s", name
);
167 fprintf(stderr
, "%s: %s -> %s\n", name
, old_hex
, new_hex
);
172 * This gets called after(if) we've successfully
173 * unpacked the data payload.
175 static void execute_commands(void)
177 struct command
*cmd
= commands
;
180 update(cmd
->ref_name
, cmd
->old_sha1
, cmd
->new_sha1
);
185 static void read_head_info(void)
187 struct command
**p
= &commands
;
189 static char line
[1000];
190 unsigned char old_sha1
[20], new_sha1
[20];
194 len
= packet_read_line(0, line
, sizeof(line
));
197 if (line
[len
-1] == '\n')
202 get_sha1_hex(line
, old_sha1
) ||
203 get_sha1_hex(line
+ 41, new_sha1
))
204 die("protocol error: expected old/new/ref, got '%s'", line
);
205 cmd
= xmalloc(sizeof(struct command
) + len
- 80);
206 memcpy(cmd
->old_sha1
, old_sha1
, 20);
207 memcpy(cmd
->new_sha1
, new_sha1
, 20);
208 memcpy(cmd
->ref_name
, line
+ 82, len
- 81);
215 static void unpack(void)
220 die("unpack fork failed");
222 execlp(unpacker
, unpacker
, NULL
);
223 die("unpack execute failed");
228 int retval
= waitpid(pid
, &status
, 0);
233 die("waitpid failed (%s)", strerror(retval
));
236 die("waitpid is confused");
237 if (WIFSIGNALED(status
))
238 die("%s died of signal %d", unpacker
, WTERMSIG(status
));
239 if (!WIFEXITED(status
))
240 die("%s died out of really strange complications", unpacker
);
241 code
= WEXITSTATUS(status
);
243 die("%s exited with error code %d", unpacker
, code
);
248 int main(int argc
, char **argv
)
251 const char *dir
= NULL
;
255 for (i
= 1; i
< argc
; i
++) {
256 const char *arg
= *argv
++;
259 if (!strncmp(arg
, "--unpack=", 9)) {
263 /* Do flag handling here */
264 usage(receive_pack_usage
);
268 nr_heads
= argc
- i
- 1;
272 usage(receive_pack_usage
);
274 /* chdir to the directory. If that fails, try appending ".git" */
275 if (chdir(dir
) < 0) {
276 static char path
[PATH_MAX
];
277 snprintf(path
, sizeof(path
), "%s.git", dir
);
279 die("unable to cd to %s", dir
);
282 /* If we have a ".git" directory, chdir to it */
284 setenv("GIT_DIR", ".", 1);
286 if (access("objects", X_OK
) < 0 || access("refs/heads", X_OK
) < 0)
287 die("%s doesn't appear to be a git directory", dir
);
288 write_head_info("refs/", nr_heads
, heads
);