1 #include "git-compat-util.h"
6 #include "run-command.h"
10 static char *server_capabilities;
12 static int check_ref(const char *name, int len, unsigned int flags)
17 if (len < 5 || memcmp(name, "refs/", 5))
20 /* Skip the "refs/" part */
24 /* REF_NORMAL means that we don't want the magic fake tag refs */
25 if ((flags & REF_NORMAL) && check_ref_format(name) < 0)
28 /* REF_HEADS means that we want regular branch heads */
29 if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6))
32 /* REF_TAGS means that we want tags */
33 if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5))
36 /* All type bits clear means that we are ok with anything */
37 return !(flags & ~REF_NORMAL);
40 int check_ref_type(const struct ref *ref, int flags)
42 return check_ref(ref->name, strlen(ref->name), flags);
45 static void add_extra_have(struct extra_have_objects *extra, unsigned char *sha1)
47 ALLOC_GROW(extra->array, extra->nr + 1, extra->alloc);
48 hashcpy(&(extra->array[extra->nr][0]), sha1);
53 * Read all the refs from the other end
55 struct ref **get_remote_heads(int in, struct ref **list,
56 int nr_match, char **match,
58 struct extra_have_objects *extra_have)
63 unsigned char old_sha1[20];
64 static char buffer[1000];
68 len = packet_read_line(in, buffer, sizeof(buffer));
71 if (buffer[len-1] == '\n')
74 if (len > 4 && !prefixcmp(buffer, "ERR "))
75 die("remote error: %s", buffer + 4);
77 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
78 die("protocol error: expected sha/ref, got '%s'", buffer);
81 name_len = strlen(name);
82 if (len != name_len + 41) {
83 free(server_capabilities);
84 server_capabilities = xstrdup(name + name_len + 1);
88 name_len == 5 && !memcmp(".have", name, 5)) {
89 add_extra_have(extra_have, old_sha1);
93 if (!check_ref(name, name_len, flags))
95 if (nr_match && !path_match(name, nr_match, match))
97 ref = alloc_ref(buffer + 41);
98 hashcpy(ref->old_sha1, old_sha1);
105 int server_supports(const char *feature)
107 return server_capabilities &&
108 strstr(server_capabilities, feature) != NULL;
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 if (!strcmp(name, "file"))
150 die("I don't handle protocol '%s'", name);
154 #define STR(s) STR_(s)
156 static void get_host_and_port(char **host, const char **port)
160 if (*host[0] == '[') {
161 end = strchr(*host + 1, ']');
170 colon = strchr(end, ':');
180 static const char *ai_name(const struct addrinfo *ai)
182 static char addr[NI_MAXHOST];
183 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
184 NI_NUMERICHOST) != 0)
185 strcpy(addr, "(unknown)");
191 * Returns a connected socket() fd, or else die()s.
193 static int git_tcp_connect_sock(char *host, int flags)
195 int sockfd = -1, saved_errno = 0;
196 const char *port = STR(DEFAULT_GIT_PORT);
197 struct addrinfo hints, *ai0, *ai;
201 get_host_and_port(&host, &port);
205 memset(&hints, 0, sizeof(hints));
206 hints.ai_socktype = SOCK_STREAM;
207 hints.ai_protocol = IPPROTO_TCP;
209 if (flags & CONNECT_VERBOSE)
210 fprintf(stderr, "Looking up %s ... ", host);
212 gai = getaddrinfo(host, port, &hints, &ai);
214 die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai));
216 if (flags & CONNECT_VERBOSE)
217 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
219 for (ai0 = ai; ai; ai = ai->ai_next) {
220 sockfd = socket(ai->ai_family,
221 ai->ai_socktype, ai->ai_protocol);
226 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
228 fprintf(stderr, "%s[%d: %s]: errno=%s\n",
232 strerror(saved_errno));
237 if (flags & CONNECT_VERBOSE)
238 fprintf(stderr, "%s ", ai_name(ai));
245 die("unable to connect a socket (%s)", strerror(saved_errno));
247 if (flags & CONNECT_VERBOSE)
248 fprintf(stderr, "done.\n");
256 * Returns a connected socket() fd, or else die()s.
258 static int git_tcp_connect_sock(char *host, int flags)
260 int sockfd = -1, saved_errno = 0;
261 const char *port = STR(DEFAULT_GIT_PORT);
264 struct sockaddr_in sa;
269 get_host_and_port(&host, &port);
271 if (flags & CONNECT_VERBOSE)
272 fprintf(stderr, "Looking up %s ... ", host);
274 he = gethostbyname(host);
276 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
277 nport = strtoul(port, &ep, 10);
278 if ( ep == port || *ep ) {
280 struct servent *se = getservbyname(port,"tcp");
282 die("Unknown port %s", port);
286 if (flags & CONNECT_VERBOSE)
287 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
289 for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
290 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
296 memset(&sa, 0, sizeof sa);
297 sa.sin_family = he->h_addrtype;
298 sa.sin_port = htons(nport);
299 memcpy(&sa.sin_addr, *ap, he->h_length);
301 if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
303 fprintf(stderr, "%s[%d: %s]: errno=%s\n",
306 inet_ntoa(*(struct in_addr *)&sa.sin_addr),
307 strerror(saved_errno));
312 if (flags & CONNECT_VERBOSE)
313 fprintf(stderr, "%s ",
314 inet_ntoa(*(struct in_addr *)&sa.sin_addr));
319 die("unable to connect a socket (%s)", strerror(saved_errno));
321 if (flags & CONNECT_VERBOSE)
322 fprintf(stderr, "done.\n");
330 static void git_tcp_connect(int fd[2], char *host, int flags)
332 int sockfd = git_tcp_connect_sock(host, flags);
339 static char *git_proxy_command;
341 static int git_proxy_command_options(const char *var, const char *value,
344 if (!strcmp(var, "core.gitproxy")) {
348 const char *rhost_name = cb;
349 int rhost_len = strlen(rhost_name);
351 if (git_proxy_command)
354 return config_error_nonbool(var);
356 * ;# matches www.kernel.org as well
357 * gitproxy = netcatter-1 for kernel.org
358 * gitproxy = netcatter-2 for sample.xz
359 * gitproxy = netcatter-default
361 for_pos = strstr(value, " for ");
363 /* matches everybody */
364 matchlen = strlen(value);
366 hostlen = strlen(for_pos + 5);
367 if (rhost_len < hostlen)
369 else if (!strncmp(for_pos + 5,
370 rhost_name + rhost_len - hostlen,
372 ((rhost_len == hostlen) ||
373 rhost_name[rhost_len - hostlen -1] == '.'))
374 matchlen = for_pos - value;
379 /* core.gitproxy = none for kernel.org */
381 !memcmp(value, "none", 4))
383 git_proxy_command = xmemdupz(value, matchlen);
388 return git_default_config(var, value, cb);
391 static int git_use_proxy(const char *host)
393 git_proxy_command = getenv("GIT_PROXY_COMMAND");
394 git_config(git_proxy_command_options, (void*)host);
395 return (git_proxy_command && *git_proxy_command);
398 static struct child_process *git_proxy_connect(int fd[2], char *host)
400 const char *port = STR(DEFAULT_GIT_PORT);
402 struct child_process *proxy;
404 get_host_and_port(&host, &port);
406 argv = xmalloc(sizeof(*argv) * 4);
407 argv[0] = git_proxy_command;
411 proxy = xcalloc(1, sizeof(*proxy));
415 if (start_command(proxy))
416 die("cannot start proxy %s", argv[0]);
417 fd[0] = proxy->out; /* read from proxy stdout */
418 fd[1] = proxy->in; /* write to proxy stdin */
422 #define MAX_CMD_LEN 1024
424 static char *get_port(char *host)
427 char *p = strchr(host, ':');
430 long port = strtol(p + 1, &end, 10);
431 if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
440 static struct child_process no_fork;
443 * This returns a dummy child_process if the transport protocol does not
444 * need fork(2), or a struct child_process object if it does. Once done,
445 * finish the connection with finish_connect() with the value returned from
446 * this function (it is safe to call finish_connect() with NULL to support
449 * If it returns, the connect is successful; it just dies on errors (this
450 * will hopefully be changed in a libification effort, to return NULL when
451 * the connection failed).
453 struct child_process *git_connect(int fd[2], const char *url_orig,
454 const char *prog, int flags)
460 struct child_process *conn = &no_fork;
461 enum protocol protocol = PROTO_LOCAL;
467 /* Without this we cannot rely on waitpid() to tell
468 * what happened to our children.
470 signal(SIGCHLD, SIG_DFL);
472 if (is_url(url_orig))
473 url = url_decode(url_orig);
475 url = xstrdup(url_orig);
477 host = strstr(url, "://");
480 protocol = get_protocol(url);
489 * Don't do destructive transforms with git:// as that
490 * protocol code does '[]' unwrapping of its own.
492 if (host[0] == '[') {
493 end = strchr(host + 1, ']');
495 if (protocol != PROTO_GIT) {
505 path = strchr(end, c);
506 if (path && !has_dos_drive_prefix(end)) {
508 protocol = PROTO_SSH;
515 die("No path specified. See 'man git-pull' for valid url syntax");
518 * null-terminate hostname and point path to ~ for URL's like this:
519 * ssh://host.xz/~user/repo
521 if (protocol != PROTO_LOCAL && host != url) {
534 * Add support for ssh port: ssh://host.xy:<port>/...
536 if (protocol == PROTO_SSH && host != url)
537 port = get_port(host);
539 if (protocol == PROTO_GIT) {
540 /* These underlying connection commands die() if they
543 char *target_host = xstrdup(host);
544 if (git_use_proxy(host))
545 conn = git_proxy_connect(fd, host);
547 git_tcp_connect(fd, host, flags);
549 * Separate original protocol components prog and path
550 * from extended host header with a NUL byte.
552 * Note: Do not add any other headers here! Doing so
553 * will cause older git-daemon servers to crash.
566 conn = xcalloc(1, sizeof(*conn));
568 strbuf_init(&cmd, MAX_CMD_LEN);
569 strbuf_addstr(&cmd, prog);
570 strbuf_addch(&cmd, ' ');
571 sq_quote_buf(&cmd, path);
572 if (cmd.len >= MAX_CMD_LEN)
573 die("command line too long");
575 conn->in = conn->out = -1;
576 conn->argv = arg = xcalloc(7, sizeof(*arg));
577 if (protocol == PROTO_SSH) {
578 const char *ssh = getenv("GIT_SSH");
579 int putty = ssh && strcasestr(ssh, "plink");
580 if (!ssh) ssh = "ssh";
583 if (putty && !strcasestr(ssh, "tortoiseplink"))
586 /* P is for PuTTY, p is for OpenSSH */
587 *arg++ = putty ? "-P" : "-p";
593 /* remove repo-local variables from the environment */
594 conn->env = local_repo_env;
600 if (start_command(conn))
601 die("unable to fork");
603 fd[0] = conn->out; /* read from child's stdout */
604 fd[1] = conn->in; /* write to child's stdin */
605 strbuf_release(&cmd);
612 int git_connection_is_socket(struct child_process *conn)
614 return conn == &no_fork;
617 int finish_connect(struct child_process *conn)
620 if (!conn || git_connection_is_socket(conn))
623 code = finish_command(conn);
629 char *git_getpass(const char *prompt)
632 struct child_process pass;
634 static struct strbuf buffer = STRBUF_INIT;
636 askpass = getenv("GIT_ASKPASS");
638 askpass = askpass_program;
640 askpass = getenv("SSH_ASKPASS");
641 if (!askpass || !(*askpass)) {
642 char *result = getpass(prompt);
644 die_errno("Could not read password");
652 memset(&pass, 0, sizeof(pass));
656 if (start_command(&pass))
659 strbuf_reset(&buffer);
660 if (strbuf_read(&buffer, pass.out, 20) < 0)
661 die("failed to read password from %s\n", askpass);
665 if (finish_command(&pass))
668 strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));