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
, cnt
++) {
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"));