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Commit | Line | Data |
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61221472 | 1 | #include "cache.h" |
f3a3214e | 2 | #include "pkt-line.h" |
7f8e9828 | 3 | #include <sys/wait.h> |
61221472 LT |
4 | |
5 | static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*"; | |
61221472 LT |
6 | static const char *exec = "git-receive-pack"; |
7 | ||
d0efc8a7 LT |
8 | static int path_match(const char *path, int nr, char **match) |
9 | { | |
10 | int i; | |
11 | int pathlen = strlen(path); | |
12 | ||
13 | for (i = 0; i < nr; i++) { | |
14 | char *s = match[i]; | |
15 | int len = strlen(s); | |
16 | ||
17 | if (!len || len > pathlen) | |
18 | continue; | |
19 | if (memcmp(path + pathlen - len, s, len)) | |
20 | continue; | |
21 | if (pathlen > len && path[pathlen - len - 1] != '/') | |
22 | continue; | |
23 | *s = 0; | |
24 | return 1; | |
25 | } | |
26 | return 0; | |
27 | } | |
28 | ||
e4b5c7ff LT |
29 | struct ref { |
30 | struct ref *next; | |
31 | unsigned char old_sha1[20]; | |
32 | unsigned char new_sha1[20]; | |
33 | char name[0]; | |
34 | }; | |
35 | ||
94fdb7aa LT |
36 | static void exec_pack_objects(void) |
37 | { | |
38 | static char *args[] = { | |
39 | "git-pack-objects", | |
40 | "--stdout", | |
41 | NULL | |
42 | }; | |
43 | execvp("git-pack-objects", args); | |
44 | die("git-pack-objects exec failed (%s)", strerror(errno)); | |
45 | } | |
46 | ||
47 | static void exec_rev_list(struct ref *refs) | |
48 | { | |
49 | static char *args[1000]; | |
50 | int i = 0; | |
51 | ||
52 | args[i++] = "git-rev-list"; /* 0 */ | |
53 | args[i++] = "--objects"; /* 1 */ | |
54 | while (refs) { | |
55 | char *buf = malloc(100); | |
56 | if (i > 900) | |
57 | die("git-rev-list environment overflow"); | |
58 | args[i++] = buf; | |
59 | snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1)); | |
60 | buf += 50; | |
61 | args[i++] = buf; | |
62 | snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1)); | |
63 | refs = refs->next; | |
64 | } | |
65 | args[i] = NULL; | |
66 | execvp("git-rev-list", args); | |
67 | die("git-rev-list exec failed (%s)", strerror(errno)); | |
68 | } | |
69 | ||
70 | static void rev_list(int fd, struct ref *refs) | |
71 | { | |
72 | int pipe_fd[2]; | |
73 | pid_t pack_objects_pid; | |
74 | ||
75 | if (pipe(pipe_fd) < 0) | |
76 | die("rev-list setup: pipe failed"); | |
77 | pack_objects_pid = fork(); | |
78 | if (!pack_objects_pid) { | |
79 | dup2(pipe_fd[0], 0); | |
80 | dup2(fd, 1); | |
81 | close(pipe_fd[0]); | |
82 | close(pipe_fd[1]); | |
83 | close(fd); | |
84 | exec_pack_objects(); | |
85 | die("pack-objects setup failed"); | |
86 | } | |
87 | if (pack_objects_pid < 0) | |
88 | die("pack-objects fork failed"); | |
89 | dup2(pipe_fd[1], 1); | |
90 | close(pipe_fd[0]); | |
91 | close(pipe_fd[1]); | |
92 | close(fd); | |
93 | exec_rev_list(refs); | |
94 | } | |
95 | ||
96 | static int pack_objects(int fd, struct ref *refs) | |
97 | { | |
98 | pid_t rev_list_pid; | |
99 | ||
100 | rev_list_pid = fork(); | |
101 | if (!rev_list_pid) { | |
102 | rev_list(fd, refs); | |
103 | die("rev-list setup failed"); | |
104 | } | |
105 | if (rev_list_pid < 0) | |
106 | die("rev-list fork failed"); | |
107 | /* | |
108 | * We don't wait for the rev-list pipeline in the parent: | |
109 | * we end up waiting for the other end instead | |
110 | */ | |
7ec4e608 | 111 | return 0; |
94fdb7aa | 112 | } |
e4b5c7ff LT |
113 | |
114 | static int read_ref(const char *ref, unsigned char *sha1) | |
115 | { | |
116 | int fd, ret; | |
117 | static char pathname[PATH_MAX]; | |
118 | char buffer[60]; | |
119 | const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT; | |
120 | ||
121 | snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref); | |
122 | fd = open(pathname, O_RDONLY); | |
123 | if (fd < 0) | |
124 | return -1; | |
125 | ret = -1; | |
126 | if (read(fd, buffer, sizeof(buffer)) >= 40) | |
127 | ret = get_sha1_hex(buffer, sha1); | |
128 | close(fd); | |
129 | return ret; | |
130 | } | |
131 | ||
d0efc8a7 | 132 | static int send_pack(int in, int out, int nr_match, char **match) |
61221472 | 133 | { |
94fdb7aa | 134 | struct ref *ref_list = NULL, **last_ref = &ref_list; |
7f8e9828 LT |
135 | struct ref *ref; |
136 | ||
61221472 | 137 | for (;;) { |
e4b5c7ff LT |
138 | unsigned char old_sha1[20]; |
139 | unsigned char new_sha1[20]; | |
61221472 | 140 | static char buffer[1000]; |
e4b5c7ff | 141 | char *name; |
f3a3214e LT |
142 | int len; |
143 | ||
144 | len = packet_read_line(in, buffer, sizeof(buffer)); | |
e4b5c7ff LT |
145 | if (!len) |
146 | break; | |
147 | if (buffer[len-1] == '\n') | |
148 | buffer[--len] = 0; | |
149 | ||
150 | if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') | |
151 | die("protocol error: expected sha/ref, got '%s'", buffer); | |
152 | name = buffer + 41; | |
d0efc8a7 LT |
153 | if (nr_match && !path_match(name, nr_match, match)) |
154 | continue; | |
7f8e9828 LT |
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); | |
e4b5c7ff LT |
159 | if (!memcmp(old_sha1, new_sha1, 20)) { |
160 | fprintf(stderr, "'%s' unchanged\n", name); | |
7f8e9828 | 161 | continue; |
e4b5c7ff | 162 | } |
7f8e9828 LT |
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); | |
167 | ref->next = NULL; | |
168 | *last_ref = ref; | |
169 | last_ref = &ref->next; | |
170 | } | |
171 | ||
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); | |
61221472 | 178 | } |
7f8e9828 | 179 | |
f3a3214e | 180 | packet_flush(out); |
94fdb7aa LT |
181 | if (ref_list) |
182 | pack_objects(out, ref_list); | |
61221472 LT |
183 | close(out); |
184 | return 0; | |
185 | } | |
186 | ||
187 | /* | |
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. | |
192 | */ | |
193 | static char *shell_safe(char *url) | |
194 | { | |
195 | char *n = url; | |
196 | unsigned char c; | |
197 | static const char flags[256] = { | |
198 | ['0'...'9'] = 1, | |
199 | ['a'...'z'] = 1, | |
200 | ['A'...'Z'] = 1, | |
201 | ['.'] = 1, ['/'] = 1, | |
202 | ['-'] = 1, ['+'] = 1, | |
203 | [':'] = 1 | |
204 | }; | |
205 | ||
206 | while ((c = *n++) != 0) { | |
207 | if (flags[c] != 1) | |
208 | die("I don't like '%c'. Sue me.", c); | |
209 | } | |
210 | return url; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Yeah, yeah, fixme. Need to pass in the heads etc. | |
215 | */ | |
216 | static int setup_connection(int fd[2], char *url, char **heads) | |
217 | { | |
218 | char command[1024]; | |
219 | const char *host, *path; | |
220 | char *colon; | |
221 | int pipefd[2][2]; | |
7f8e9828 | 222 | pid_t pid; |
61221472 LT |
223 | |
224 | url = shell_safe(url); | |
225 | host = NULL; | |
226 | path = url; | |
227 | colon = strchr(url, ':'); | |
228 | if (colon) { | |
229 | *colon = 0; | |
230 | host = url; | |
231 | path = colon+1; | |
232 | } | |
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"); | |
7f8e9828 LT |
236 | pid = fork(); |
237 | if (!pid) { | |
61221472 LT |
238 | dup2(pipefd[1][0], 0); |
239 | dup2(pipefd[0][1], 1); | |
240 | close(pipefd[0][0]); | |
241 | close(pipefd[0][1]); | |
242 | close(pipefd[1][0]); | |
243 | close(pipefd[1][1]); | |
244 | if (host) | |
245 | execlp("ssh", "ssh", host, command, NULL); | |
246 | else | |
f3a3214e | 247 | execlp("sh", "sh", "-c", command, NULL); |
61221472 LT |
248 | die("exec failed"); |
249 | } | |
250 | fd[0] = pipefd[0][0]; | |
251 | fd[1] = pipefd[1][1]; | |
252 | close(pipefd[0][1]); | |
253 | close(pipefd[1][0]); | |
7f8e9828 | 254 | return pid; |
61221472 LT |
255 | } |
256 | ||
257 | int main(int argc, char **argv) | |
258 | { | |
259 | int i, nr_heads = 0; | |
260 | char *dest = NULL; | |
261 | char **heads = NULL; | |
7f8e9828 LT |
262 | int fd[2], ret; |
263 | pid_t pid; | |
61221472 LT |
264 | |
265 | argv++; | |
266 | for (i = 1; i < argc; i++) { | |
267 | char *arg = *argv++; | |
268 | ||
269 | if (*arg == '-') { | |
270 | if (!strncmp(arg, "--exec=", 7)) { | |
271 | exec = arg + 7; | |
272 | continue; | |
273 | } | |
274 | usage(send_pack_usage); | |
275 | } | |
276 | dest = arg; | |
277 | heads = argv; | |
278 | nr_heads = argc - i -1; | |
279 | break; | |
280 | } | |
281 | if (!dest) | |
282 | usage(send_pack_usage); | |
7f8e9828 LT |
283 | pid = setup_connection(fd, dest, heads); |
284 | if (pid < 0) | |
61221472 | 285 | return 1; |
d0efc8a7 | 286 | ret = send_pack(fd[0], fd[1], nr_heads, heads); |
7f8e9828 LT |
287 | close(fd[0]); |
288 | close(fd[1]); | |
289 | waitpid(pid, NULL, 0); | |
290 | return ret; | |
61221472 | 291 | } |