5 static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
6 static const char *exec = "git-receive-pack";
8 static int path_match(const char *path, int nr, char **match)
11 int pathlen = strlen(path);
13 for (i = 0; i < nr; i++) {
17 if (!len || len > pathlen)
19 if (memcmp(path + pathlen - len, s, len))
21 if (pathlen > len && path[pathlen - len - 1] != '/')
31 unsigned char old_sha1[20];
32 unsigned char new_sha1[20];
36 static void exec_pack_objects(void)
38 static char *args[] = {
43 execvp("git-pack-objects", args);
44 die("git-pack-objects exec failed (%s)", strerror(errno));
47 static void exec_rev_list(struct ref *refs)
49 static char *args[1000];
52 args[i++] = "git-rev-list"; /* 0 */
53 args[i++] = "--objects"; /* 1 */
55 char *buf = malloc(100);
57 die("git-rev-list environment overflow");
59 snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
62 snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
66 execvp("git-rev-list", args);
67 die("git-rev-list exec failed (%s)", strerror(errno));
70 static void rev_list(int fd, struct ref *refs)
73 pid_t pack_objects_pid;
75 if (pipe(pipe_fd) < 0)
76 die("rev-list setup: pipe failed");
77 pack_objects_pid = fork();
78 if (!pack_objects_pid) {
85 die("pack-objects setup failed");
87 if (pack_objects_pid < 0)
88 die("pack-objects fork failed");
96 static int pack_objects(int fd, struct ref *refs)
100 rev_list_pid = fork();
103 die("rev-list setup failed");
105 if (rev_list_pid < 0)
106 die("rev-list fork failed");
108 * We don't wait for the rev-list pipeline in the parent:
109 * we end up waiting for the other end instead
114 static int read_ref(const char *ref, unsigned char *sha1)
117 static char pathname[PATH_MAX];
119 const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
121 snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref);
122 fd = open(pathname, O_RDONLY);
126 if (read(fd, buffer, sizeof(buffer)) >= 40)
127 ret = get_sha1_hex(buffer, sha1);
132 static int send_pack(int in, int out, int nr_match, char **match)
134 struct ref *ref_list = NULL, **last_ref = &ref_list;
138 unsigned char old_sha1[20];
139 unsigned char new_sha1[20];
140 static char buffer[1000];
144 len = packet_read_line(in, buffer, sizeof(buffer));
147 if (buffer[len-1] == '\n')
150 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
151 die("protocol error: expected sha/ref, got '%s'", buffer);
153 if (nr_match && !path_match(name, nr_match, match))
155 if (read_ref(name, new_sha1) < 0)
156 return error("no such local reference '%s'", name);
157 if (!has_sha1_file(old_sha1))
158 return error("remote '%s' points to object I don't have", name);
159 if (!memcmp(old_sha1, new_sha1, 20)) {
160 fprintf(stderr, "'%s' unchanged\n", name);
163 ref = xmalloc(sizeof(*ref) + len - 40);
164 memcpy(ref->old_sha1, old_sha1, 20);
165 memcpy(ref->new_sha1, new_sha1, 20);
166 memcpy(ref->name, buffer + 41, len - 40);
169 last_ref = &ref->next;
172 for (ref = ref_list; ref; ref = ref->next) {
173 char old_hex[60], *new_hex;
174 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
175 new_hex = sha1_to_hex(ref->new_sha1);
176 packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
177 fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
182 pack_objects(out, ref_list);
188 * First, make it shell-safe. We do this by just disallowing any
189 * special characters. Somebody who cares can do escaping and let
190 * through the rest. But since we're doing to feed this to ssh as
191 * a command line, we're going to be pretty damn anal for now.
193 static char *shell_safe(char *url)
197 static const char flags[256] = {
201 ['.'] = 1, ['/'] = 1,
202 ['-'] = 1, ['+'] = 1,
206 while ((c = *n++) != 0) {
208 die("I don't like '%c'. Sue me.", c);
214 * Yeah, yeah, fixme. Need to pass in the heads etc.
216 static int setup_connection(int fd[2], char *url, char **heads)
219 const char *host, *path;
224 url = shell_safe(url);
227 colon = strchr(url, ':');
233 snprintf(command, sizeof(command), "%s %s", exec, path);
234 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
235 die("unable to create pipe pair for communication");
238 dup2(pipefd[1][0], 0);
239 dup2(pipefd[0][1], 1);
245 execlp("ssh", "ssh", host, command, NULL);
247 execlp("sh", "sh", "-c", command, NULL);
250 fd[0] = pipefd[0][0];
251 fd[1] = pipefd[1][1];
257 int main(int argc, char **argv)
266 for (i = 1; i < argc; i++) {
270 if (!strncmp(arg, "--exec=", 7)) {
274 usage(send_pack_usage);
278 nr_heads = argc - i -1;
282 usage(send_pack_usage);
283 pid = setup_connection(fd, dest, heads);
286 ret = send_pack(fd[0], fd[1], nr_heads, heads);
289 waitpid(pid, NULL, 0);