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_refname_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
,
57 struct extra_have_objects
*extra_have
)
62 unsigned char old_sha1
[20];
63 static char buffer
[1000];
67 len
= packet_read_line(in
, buffer
, sizeof(buffer
));
70 if (buffer
[len
-1] == '\n')
73 if (len
> 4 && !prefixcmp(buffer
, "ERR "))
74 die("remote error: %s", buffer
+ 4);
76 if (len
< 42 || get_sha1_hex(buffer
, old_sha1
) || buffer
[40] != ' ')
77 die("protocol error: expected sha/ref, got '%s'", buffer
);
80 name_len
= strlen(name
);
81 if (len
!= name_len
+ 41) {
82 free(server_capabilities
);
83 server_capabilities
= xstrdup(name
+ name_len
+ 1);
87 name_len
== 5 && !memcmp(".have", name
, 5)) {
88 add_extra_have(extra_have
, old_sha1
);
92 if (!check_ref(name
, name_len
, flags
))
94 ref
= alloc_ref(buffer
+ 41);
95 hashcpy(ref
->old_sha1
, old_sha1
);
102 int server_supports(const char *feature
)
104 return server_capabilities
&&
105 strstr(server_capabilities
, feature
) != NULL
;
114 static enum protocol
get_protocol(const char *name
)
116 if (!strcmp(name
, "ssh"))
118 if (!strcmp(name
, "git"))
120 if (!strcmp(name
, "git+ssh"))
122 if (!strcmp(name
, "ssh+git"))
124 if (!strcmp(name
, "file"))
126 die("I don't handle protocol '%s'", name
);
130 #define STR(s) STR_(s)
132 static void get_host_and_port(char **host
, const char **port
)
136 if (*host
[0] == '[') {
137 end
= strchr(*host
+ 1, ']');
146 colon
= strchr(end
, ':');
156 static const char *ai_name(const struct addrinfo
*ai
)
158 static char addr
[NI_MAXHOST
];
159 if (getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, addr
, sizeof(addr
), NULL
, 0,
160 NI_NUMERICHOST
) != 0)
161 strcpy(addr
, "(unknown)");
167 * Returns a connected socket() fd, or else die()s.
169 static int git_tcp_connect_sock(char *host
, int flags
)
171 struct strbuf error_message
= STRBUF_INIT
;
173 const char *port
= STR(DEFAULT_GIT_PORT
);
174 struct addrinfo hints
, *ai0
, *ai
;
178 get_host_and_port(&host
, &port
);
182 memset(&hints
, 0, sizeof(hints
));
183 hints
.ai_socktype
= SOCK_STREAM
;
184 hints
.ai_protocol
= IPPROTO_TCP
;
186 if (flags
& CONNECT_VERBOSE
)
187 fprintf(stderr
, "Looking up %s ... ", host
);
189 gai
= getaddrinfo(host
, port
, &hints
, &ai
);
191 die("Unable to look up %s (port %s) (%s)", host
, port
, gai_strerror(gai
));
193 if (flags
& CONNECT_VERBOSE
)
194 fprintf(stderr
, "done.\nConnecting to %s (port %s) ... ", host
, port
);
196 for (ai0
= ai
; ai
; ai
= ai
->ai_next
, cnt
++) {
197 sockfd
= socket(ai
->ai_family
,
198 ai
->ai_socktype
, ai
->ai_protocol
);
200 (connect(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)) {
201 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
202 host
, cnt
, ai_name(ai
), strerror(errno
));
208 if (flags
& CONNECT_VERBOSE
)
209 fprintf(stderr
, "%s ", ai_name(ai
));
216 die("unable to connect to %s:\n%s", host
, error_message
.buf
);
218 if (flags
& CONNECT_VERBOSE
)
219 fprintf(stderr
, "done.\n");
221 strbuf_release(&error_message
);
229 * Returns a connected socket() fd, or else die()s.
231 static int git_tcp_connect_sock(char *host
, int flags
)
233 struct strbuf error_message
= STRBUF_INIT
;
235 const char *port
= STR(DEFAULT_GIT_PORT
);
238 struct sockaddr_in sa
;
243 get_host_and_port(&host
, &port
);
245 if (flags
& CONNECT_VERBOSE
)
246 fprintf(stderr
, "Looking up %s ... ", host
);
248 he
= gethostbyname(host
);
250 die("Unable to look up %s (%s)", host
, hstrerror(h_errno
));
251 nport
= strtoul(port
, &ep
, 10);
252 if ( ep
== port
|| *ep
) {
254 struct servent
*se
= getservbyname(port
,"tcp");
256 die("Unknown port %s", port
);
260 if (flags
& CONNECT_VERBOSE
)
261 fprintf(stderr
, "done.\nConnecting to %s (port %s) ... ", host
, port
);
263 for (cnt
= 0, ap
= he
->h_addr_list
; *ap
; ap
++, cnt
++) {
264 memset(&sa
, 0, sizeof sa
);
265 sa
.sin_family
= he
->h_addrtype
;
266 sa
.sin_port
= htons(nport
);
267 memcpy(&sa
.sin_addr
, *ap
, he
->h_length
);
269 sockfd
= socket(he
->h_addrtype
, SOCK_STREAM
, 0);
271 connect(sockfd
, (struct sockaddr
*)&sa
, sizeof sa
) < 0) {
272 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
275 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
),
282 if (flags
& CONNECT_VERBOSE
)
283 fprintf(stderr
, "%s ",
284 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
));
289 die("unable to connect to %s:\n%s", host
, error_message
.buf
);
291 if (flags
& CONNECT_VERBOSE
)
292 fprintf(stderr
, "done.\n");
300 static void git_tcp_connect(int fd
[2], char *host
, int flags
)
302 int sockfd
= git_tcp_connect_sock(host
, flags
);
309 static char *git_proxy_command
;
311 static int git_proxy_command_options(const char *var
, const char *value
,
314 if (!strcmp(var
, "core.gitproxy")) {
318 const char *rhost_name
= cb
;
319 int rhost_len
= strlen(rhost_name
);
321 if (git_proxy_command
)
324 return config_error_nonbool(var
);
326 * ;# matches www.kernel.org as well
327 * gitproxy = netcatter-1 for kernel.org
328 * gitproxy = netcatter-2 for sample.xz
329 * gitproxy = netcatter-default
331 for_pos
= strstr(value
, " for ");
333 /* matches everybody */
334 matchlen
= strlen(value
);
336 hostlen
= strlen(for_pos
+ 5);
337 if (rhost_len
< hostlen
)
339 else if (!strncmp(for_pos
+ 5,
340 rhost_name
+ rhost_len
- hostlen
,
342 ((rhost_len
== hostlen
) ||
343 rhost_name
[rhost_len
- hostlen
-1] == '.'))
344 matchlen
= for_pos
- value
;
349 /* core.gitproxy = none for kernel.org */
351 !memcmp(value
, "none", 4))
353 git_proxy_command
= xmemdupz(value
, matchlen
);
358 return git_default_config(var
, value
, cb
);
361 static int git_use_proxy(const char *host
)
363 git_proxy_command
= getenv("GIT_PROXY_COMMAND");
364 git_config(git_proxy_command_options
, (void*)host
);
365 return (git_proxy_command
&& *git_proxy_command
);
368 static struct child_process
*git_proxy_connect(int fd
[2], char *host
)
370 const char *port
= STR(DEFAULT_GIT_PORT
);
372 struct child_process
*proxy
;
374 get_host_and_port(&host
, &port
);
376 argv
= xmalloc(sizeof(*argv
) * 4);
377 argv
[0] = git_proxy_command
;
381 proxy
= xcalloc(1, sizeof(*proxy
));
385 if (start_command(proxy
))
386 die("cannot start proxy %s", argv
[0]);
387 fd
[0] = proxy
->out
; /* read from proxy stdout */
388 fd
[1] = proxy
->in
; /* write to proxy stdin */
392 #define MAX_CMD_LEN 1024
394 static char *get_port(char *host
)
397 char *p
= strchr(host
, ':');
400 long port
= strtol(p
+ 1, &end
, 10);
401 if (end
!= p
+ 1 && *end
== '\0' && 0 <= port
&& port
< 65536) {
410 static struct child_process no_fork
;
413 * This returns a dummy child_process if the transport protocol does not
414 * need fork(2), or a struct child_process object if it does. Once done,
415 * finish the connection with finish_connect() with the value returned from
416 * this function (it is safe to call finish_connect() with NULL to support
419 * If it returns, the connect is successful; it just dies on errors (this
420 * will hopefully be changed in a libification effort, to return NULL when
421 * the connection failed).
423 struct child_process
*git_connect(int fd
[2], const char *url_orig
,
424 const char *prog
, int flags
)
430 struct child_process
*conn
= &no_fork
;
431 enum protocol protocol
= PROTO_LOCAL
;
437 /* Without this we cannot rely on waitpid() to tell
438 * what happened to our children.
440 signal(SIGCHLD
, SIG_DFL
);
442 if (is_url(url_orig
))
443 url
= url_decode(url_orig
);
445 url
= xstrdup(url_orig
);
447 host
= strstr(url
, "://");
450 protocol
= get_protocol(url
);
459 * Don't do destructive transforms with git:// as that
460 * protocol code does '[]' unwrapping of its own.
462 if (host
[0] == '[') {
463 end
= strchr(host
+ 1, ']');
465 if (protocol
!= PROTO_GIT
) {
475 path
= strchr(end
, c
);
476 if (path
&& !has_dos_drive_prefix(end
)) {
478 protocol
= PROTO_SSH
;
485 die("No path specified. See 'man git-pull' for valid url syntax");
488 * null-terminate hostname and point path to ~ for URL's like this:
489 * ssh://host.xz/~user/repo
491 if (protocol
!= PROTO_LOCAL
&& host
!= url
) {
504 * Add support for ssh port: ssh://host.xy:<port>/...
506 if (protocol
== PROTO_SSH
&& host
!= url
)
507 port
= get_port(host
);
509 if (protocol
== PROTO_GIT
) {
510 /* These underlying connection commands die() if they
513 char *target_host
= xstrdup(host
);
514 if (git_use_proxy(host
))
515 conn
= git_proxy_connect(fd
, host
);
517 git_tcp_connect(fd
, host
, flags
);
519 * Separate original protocol components prog and path
520 * from extended host header with a NUL byte.
522 * Note: Do not add any other headers here! Doing so
523 * will cause older git-daemon servers to crash.
536 conn
= xcalloc(1, sizeof(*conn
));
538 strbuf_init(&cmd
, MAX_CMD_LEN
);
539 strbuf_addstr(&cmd
, prog
);
540 strbuf_addch(&cmd
, ' ');
541 sq_quote_buf(&cmd
, path
);
542 if (cmd
.len
>= MAX_CMD_LEN
)
543 die("command line too long");
545 conn
->in
= conn
->out
= -1;
546 conn
->argv
= arg
= xcalloc(7, sizeof(*arg
));
547 if (protocol
== PROTO_SSH
) {
548 const char *ssh
= getenv("GIT_SSH");
549 int putty
= ssh
&& strcasestr(ssh
, "plink");
550 if (!ssh
) ssh
= "ssh";
553 if (putty
&& !strcasestr(ssh
, "tortoiseplink"))
556 /* P is for PuTTY, p is for OpenSSH */
557 *arg
++ = putty
? "-P" : "-p";
563 /* remove repo-local variables from the environment */
564 conn
->env
= local_repo_env
;
570 if (start_command(conn
))
571 die("unable to fork");
573 fd
[0] = conn
->out
; /* read from child's stdout */
574 fd
[1] = conn
->in
; /* write to child's stdin */
575 strbuf_release(&cmd
);
582 int git_connection_is_socket(struct child_process
*conn
)
584 return conn
== &no_fork
;
587 int finish_connect(struct child_process
*conn
)
590 if (!conn
|| git_connection_is_socket(conn
))
593 code
= finish_command(conn
);
599 char *git_getpass(const char *prompt
)
602 struct child_process pass
;
604 static struct strbuf buffer
= STRBUF_INIT
;
606 askpass
= getenv("GIT_ASKPASS");
608 askpass
= askpass_program
;
610 askpass
= getenv("SSH_ASKPASS");
611 if (!askpass
|| !(*askpass
)) {
612 char *result
= getpass(prompt
);
614 die_errno("Could not read password");
622 memset(&pass
, 0, sizeof(pass
));
626 if (start_command(&pass
))
629 strbuf_reset(&buffer
);
630 if (strbuf_read(&buffer
, pass
.out
, 20) < 0)
631 die("failed to read password from %s\n", askpass
);
635 if (finish_command(&pass
))
638 strbuf_setlen(&buffer
, strcspn(buffer
.buf
, "\r\n"));