1 #include "git-compat-util.h"
6 #include "run-command.h"
9 static char *server_capabilities;
11 static int check_ref(const char *name, int len, unsigned int flags)
16 if (len < 5 || memcmp(name, "refs/", 5))
19 /* Skip the "refs/" part */
23 /* REF_NORMAL means that we don't want the magic fake tag refs */
24 if ((flags & REF_NORMAL) && check_ref_format(name) < 0)
27 /* REF_HEADS means that we want regular branch heads */
28 if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6))
31 /* REF_TAGS means that we want tags */
32 if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5))
35 /* All type bits clear means that we are ok with anything */
36 return !(flags & ~REF_NORMAL);
40 * Read all the refs from the other end
42 struct ref **get_remote_heads(int in, struct ref **list,
43 int nr_match, char **match,
49 unsigned char old_sha1[20];
50 static char buffer[1000];
54 len = packet_read_line(in, buffer, sizeof(buffer));
57 if (buffer[len-1] == '\n')
60 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
61 die("protocol error: expected sha/ref, got '%s'", buffer);
64 name_len = strlen(name);
65 if (len != name_len + 41) {
66 if (server_capabilities)
67 free(server_capabilities);
68 server_capabilities = xstrdup(name + name_len + 1);
71 if (!check_ref(name, name_len, flags))
73 if (nr_match && !path_match(name, nr_match, match))
75 ref = xcalloc(1, sizeof(*ref) + len - 40);
76 hashcpy(ref->old_sha1, old_sha1);
77 memcpy(ref->name, buffer + 41, len - 40);
84 int server_supports(const char *feature)
86 return server_capabilities &&
87 strstr(server_capabilities, feature) != NULL;
90 int get_ack(int fd, unsigned char *result_sha1)
92 static char line[1000];
93 int len = packet_read_line(fd, line, sizeof(line));
96 die("git-fetch-pack: expected ACK/NAK, got EOF");
97 if (line[len-1] == '\n')
99 if (!strcmp(line, "NAK"))
101 if (!prefixcmp(line, "ACK ")) {
102 if (!get_sha1_hex(line+4, result_sha1)) {
103 if (strstr(line+45, "continue"))
108 die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
111 int path_match(const char *path, int nr, char **match)
114 int pathlen = strlen(path);
116 for (i = 0; i < nr; i++) {
120 if (!len || len > pathlen)
122 if (memcmp(path + pathlen - len, s, len))
124 if (pathlen > len && path[pathlen - len - 1] != '/')
138 static enum protocol get_protocol(const char *name)
140 if (!strcmp(name, "ssh"))
142 if (!strcmp(name, "git"))
144 if (!strcmp(name, "git+ssh"))
146 if (!strcmp(name, "ssh+git"))
148 die("I don't handle protocol '%s'", name);
152 #define STR(s) STR_(s)
157 * Returns a connected socket() fd, or else die()s.
159 static int git_tcp_connect_sock(char *host, int flags)
161 int sockfd = -1, saved_errno = 0;
163 const char *port = STR(DEFAULT_GIT_PORT);
164 struct addrinfo hints, *ai0, *ai;
167 if (host[0] == '[') {
168 end = strchr(host + 1, ']');
177 colon = strchr(end, ':');
186 memset(&hints, 0, sizeof(hints));
187 hints.ai_socktype = SOCK_STREAM;
188 hints.ai_protocol = IPPROTO_TCP;
190 if (flags & CONNECT_VERBOSE)
191 fprintf(stderr, "Looking up %s ... ", host);
193 gai = getaddrinfo(host, port, &hints, &ai);
195 die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai));
197 if (flags & CONNECT_VERBOSE)
198 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
200 for (ai0 = ai; ai; ai = ai->ai_next) {
201 sockfd = socket(ai->ai_family,
202 ai->ai_socktype, ai->ai_protocol);
207 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
219 die("unable to connect a socket (%s)", strerror(saved_errno));
221 if (flags & CONNECT_VERBOSE)
222 fprintf(stderr, "done.\n");
230 * Returns a connected socket() fd, or else die()s.
232 static int git_tcp_connect_sock(char *host, int flags)
234 int sockfd = -1, saved_errno = 0;
236 char *port = STR(DEFAULT_GIT_PORT), *ep;
238 struct sockaddr_in sa;
242 if (host[0] == '[') {
243 end = strchr(host + 1, ']');
252 colon = strchr(end, ':');
259 if (flags & CONNECT_VERBOSE)
260 fprintf(stderr, "Looking up %s ... ", host);
262 he = gethostbyname(host);
264 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
265 nport = strtoul(port, &ep, 10);
266 if ( ep == port || *ep ) {
268 struct servent *se = getservbyname(port,"tcp");
270 die("Unknown port %s\n", port);
274 if (flags & CONNECT_VERBOSE)
275 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
277 for (ap = he->h_addr_list; *ap; ap++) {
278 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
284 memset(&sa, 0, sizeof sa);
285 sa.sin_family = he->h_addrtype;
286 sa.sin_port = htons(nport);
287 memcpy(&sa.sin_addr, *ap, he->h_length);
289 if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
299 die("unable to connect a socket (%s)", strerror(saved_errno));
301 if (flags & CONNECT_VERBOSE)
302 fprintf(stderr, "done.\n");
310 static void git_tcp_connect(int fd[2], char *host, int flags)
312 int sockfd = git_tcp_connect_sock(host, flags);
319 static char *git_proxy_command;
320 static const char *rhost_name;
321 static int rhost_len;
323 static int git_proxy_command_options(const char *var, const char *value)
325 if (!strcmp(var, "core.gitproxy")) {
330 if (git_proxy_command)
333 * ;# matches www.kernel.org as well
334 * gitproxy = netcatter-1 for kernel.org
335 * gitproxy = netcatter-2 for sample.xz
336 * gitproxy = netcatter-default
338 for_pos = strstr(value, " for ");
340 /* matches everybody */
341 matchlen = strlen(value);
343 hostlen = strlen(for_pos + 5);
344 if (rhost_len < hostlen)
346 else if (!strncmp(for_pos + 5,
347 rhost_name + rhost_len - hostlen,
349 ((rhost_len == hostlen) ||
350 rhost_name[rhost_len - hostlen -1] == '.'))
351 matchlen = for_pos - value;
356 /* core.gitproxy = none for kernel.org */
358 !memcmp(value, "none", 4))
360 git_proxy_command = xmalloc(matchlen + 1);
361 memcpy(git_proxy_command, value, matchlen);
362 git_proxy_command[matchlen] = 0;
367 return git_default_config(var, value);
370 static int git_use_proxy(const char *host)
373 rhost_len = strlen(host);
374 git_proxy_command = getenv("GIT_PROXY_COMMAND");
375 git_config(git_proxy_command_options);
377 return (git_proxy_command && *git_proxy_command);
380 static void git_proxy_connect(int fd[2], char *host)
382 const char *port = STR(DEFAULT_GIT_PORT);
385 struct child_process proxy;
387 if (host[0] == '[') {
388 end = strchr(host + 1, ']');
397 colon = strchr(end, ':');
404 argv[0] = git_proxy_command;
408 memset(&proxy, 0, sizeof(proxy));
412 if (start_command(&proxy))
413 die("cannot start proxy %s", argv[0]);
414 fd[0] = proxy.out; /* read from proxy stdout */
415 fd[1] = proxy.in; /* write to proxy stdin */
418 #define MAX_CMD_LEN 1024
421 * This returns 0 if the transport protocol does not need fork(2),
422 * or a process id if it does. Once done, finish the connection
423 * with finish_connect() with the value returned from this function
424 * (it is safe to call finish_connect() with 0 to support the former
427 * Does not return a negative value on error; it just dies.
429 pid_t git_connect(int fd[2], char *url, const char *prog, int flags)
431 char *host, *path = url;
436 enum protocol protocol = PROTO_LOCAL;
439 /* Without this we cannot rely on waitpid() to tell
440 * what happened to our children.
442 signal(SIGCHLD, SIG_DFL);
444 host = strstr(url, "://");
447 protocol = get_protocol(url);
455 if (host[0] == '[') {
456 end = strchr(host + 1, ']');
466 path = strchr(end, c);
469 protocol = PROTO_SSH;
476 die("No path specified. See 'man git-pull' for valid url syntax");
479 * null-terminate hostname and point path to ~ for URL's like this:
480 * ssh://host.xz/~user/repo
482 if (protocol != PROTO_LOCAL && host != url) {
494 if (protocol == PROTO_GIT) {
495 /* These underlying connection commands die() if they
498 char *target_host = xstrdup(host);
499 if (git_use_proxy(host))
500 git_proxy_connect(fd, host);
502 git_tcp_connect(fd, host, flags);
504 * Separate original protocol components prog and path
505 * from extended components with a NUL byte.
517 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
518 die("unable to create pipe pair for communication");
521 die("unable to fork");
523 char command[MAX_CMD_LEN];
524 char *posn = command;
525 int size = MAX_CMD_LEN;
528 of |= add_to_string(&posn, &size, prog, 0);
529 of |= add_to_string(&posn, &size, " ", 0);
530 of |= add_to_string(&posn, &size, path, 1);
533 die("command line too long");
535 dup2(pipefd[1][0], 0);
536 dup2(pipefd[0][1], 1);
541 if (protocol == PROTO_SSH) {
542 const char *ssh, *ssh_basename;
543 ssh = getenv("GIT_SSH");
544 if (!ssh) ssh = "ssh";
545 ssh_basename = strrchr(ssh, '/');
550 execlp(ssh, ssh_basename, host, command, NULL);
553 unsetenv(ALTERNATE_DB_ENVIRONMENT);
554 unsetenv(DB_ENVIRONMENT);
555 unsetenv(GIT_DIR_ENVIRONMENT);
556 unsetenv(GRAFT_ENVIRONMENT);
557 unsetenv(INDEX_ENVIRONMENT);
558 execlp("sh", "sh", "-c", command, NULL);
562 fd[0] = pipefd[0][0];
563 fd[1] = pipefd[1][1];
571 int finish_connect(pid_t pid)
576 while (waitpid(pid, NULL, 0) < 0) {