4 #include "run-command.h"
6 #include "string-list.h"
9 #define HOST_NAME_MAX 256
13 #define initgroups(x, y) (0) /* nothing */
16 static int log_syslog
;
19 static int informative_errors
;
21 static const char daemon_usage
[] =
22 "git daemon [--verbose] [--syslog] [--export-all]\n"
23 " [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>]\n"
24 " [--strict-paths] [--base-path=<path>] [--base-path-relaxed]\n"
25 " [--user-path | --user-path=<path>]\n"
26 " [--interpolated-path=<path>]\n"
27 " [--reuseaddr] [--pid-file=<file>]\n"
28 " [--(enable|disable|allow-override|forbid-override)=<service>]\n"
29 " [--access-hook=<path>]\n"
30 " [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
31 " [--detach] [--user=<user> [--group=<group>]]\n"
34 /* List of acceptable pathname prefixes */
35 static char **ok_paths
;
36 static int strict_paths
;
38 /* If this is set, git-daemon-export-ok is not required */
39 static int export_all_trees
;
41 /* Take all paths relative to this one if non-NULL */
42 static const char *base_path
;
43 static const char *interpolated_path
;
44 static int base_path_relaxed
;
46 /* Flag indicating client sent extra args. */
47 static int saw_extended_args
;
49 /* If defined, ~user notation is allowed and the string is inserted
50 * after ~user/. E.g. a request to git://host/~alice/frotz would
51 * go to /home/alice/pub_git/frotz with --user-path=pub_git.
53 static const char *user_path
;
55 /* Timeout, and initial timeout */
56 static unsigned int timeout
;
57 static unsigned int init_timeout
;
59 static char *hostname
;
60 static char *canon_hostname
;
61 static char *ip_address
;
62 static char *tcp_port
;
64 static void logreport(int priority
, const char *err
, va_list params
)
68 vsnprintf(buf
, sizeof(buf
), err
, params
);
69 syslog(priority
, "%s", buf
);
72 * Since stderr is set to buffered mode, the
73 * logging of different processes will not overlap
74 * unless they overflow the (rather big) buffers.
76 fprintf(stderr
, "[%"PRIuMAX
"] ", (uintmax_t)getpid());
77 vfprintf(stderr
, err
, params
);
83 __attribute__((format (printf
, 1, 2)))
84 static void logerror(const char *err
, ...)
87 va_start(params
, err
);
88 logreport(LOG_ERR
, err
, params
);
92 __attribute__((format (printf
, 1, 2)))
93 static void loginfo(const char *err
, ...)
98 va_start(params
, err
);
99 logreport(LOG_INFO
, err
, params
);
103 static void NORETURN
daemon_die(const char *err
, va_list params
)
105 logreport(LOG_ERR
, err
, params
);
109 static const char *path_ok(const char *directory
)
111 static char rpath
[PATH_MAX
];
112 static char interp_path
[PATH_MAX
];
118 if (daemon_avoid_alias(dir
)) {
119 logerror("'%s': aliased", dir
);
125 logerror("'%s': User-path not allowed", dir
);
129 /* Got either "~alice" or "~alice/foo";
130 * rewrite them to "~alice/%s" or
133 int namlen
, restlen
= strlen(dir
);
134 const char *slash
= strchr(dir
, '/');
136 slash
= dir
+ restlen
;
137 namlen
= slash
- dir
;
139 loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path
, dir
, namlen
, restlen
, slash
);
140 snprintf(rpath
, PATH_MAX
, "%.*s/%s%.*s",
141 namlen
, dir
, user_path
, restlen
, slash
);
145 else if (interpolated_path
&& saw_extended_args
) {
146 struct strbuf expanded_path
= STRBUF_INIT
;
147 struct strbuf_expand_dict_entry dict
[6];
149 dict
[0].placeholder
= "H"; dict
[0].value
= hostname
;
150 dict
[1].placeholder
= "CH"; dict
[1].value
= canon_hostname
;
151 dict
[2].placeholder
= "IP"; dict
[2].value
= ip_address
;
152 dict
[3].placeholder
= "P"; dict
[3].value
= tcp_port
;
153 dict
[4].placeholder
= "D"; dict
[4].value
= directory
;
154 dict
[5].placeholder
= NULL
; dict
[5].value
= NULL
;
156 /* Allow only absolute */
157 logerror("'%s': Non-absolute path denied (interpolated-path active)", dir
);
161 strbuf_expand(&expanded_path
, interpolated_path
,
162 strbuf_expand_dict_cb
, &dict
);
163 strlcpy(interp_path
, expanded_path
.buf
, PATH_MAX
);
164 strbuf_release(&expanded_path
);
165 loginfo("Interpolated dir '%s'", interp_path
);
169 else if (base_path
) {
171 /* Allow only absolute */
172 logerror("'%s': Non-absolute path denied (base-path active)", dir
);
175 snprintf(rpath
, PATH_MAX
, "%s%s", base_path
, dir
);
179 path
= enter_repo(dir
, strict_paths
);
180 if (!path
&& base_path
&& base_path_relaxed
) {
182 * if we fail and base_path_relaxed is enabled, try without
183 * prefixing the base path
186 path
= enter_repo(dir
, strict_paths
);
190 logerror("'%s' does not appear to be a git repository", dir
);
194 if ( ok_paths
&& *ok_paths
) {
196 int pathlen
= strlen(path
);
198 /* The validation is done on the paths after enter_repo
199 * appends optional {.git,.git/.git} and friends, but
200 * it does not use getcwd(). So if your /pub is
201 * a symlink to /mnt/pub, you can whitelist /pub and
202 * do not have to say /mnt/pub.
205 for ( pp
= ok_paths
; *pp
; pp
++ ) {
206 int len
= strlen(*pp
);
207 if (len
<= pathlen
&&
208 !memcmp(*pp
, path
, len
) &&
209 (path
[len
] == '\0' ||
210 (!strict_paths
&& path
[len
] == '/')))
215 /* be backwards compatible */
220 logerror("'%s': not in whitelist", path
);
221 return NULL
; /* Fallthrough. Deny by default */
224 typedef int (*daemon_service_fn
)(void);
225 struct daemon_service
{
227 const char *config_name
;
228 daemon_service_fn fn
;
233 static int daemon_error(const char *dir
, const char *msg
)
235 if (!informative_errors
)
236 msg
= "access denied or repository not exported";
237 packet_write(1, "ERR %s: %s", msg
, dir
);
241 static const char *access_hook
;
243 static int run_access_hook(struct daemon_service
*service
, const char *dir
, const char *path
)
245 struct child_process child
= CHILD_PROCESS_INIT
;
246 struct strbuf buf
= STRBUF_INIT
;
248 const char **arg
= argv
;
252 #define STRARG(x) ((x) ? (x) : "")
253 *arg
++ = access_hook
;
254 *arg
++ = service
->name
;
256 *arg
++ = STRARG(hostname
);
257 *arg
++ = STRARG(canon_hostname
);
258 *arg
++ = STRARG(ip_address
);
259 *arg
++ = STRARG(tcp_port
);
268 if (start_command(&child
)) {
269 logerror("daemon access hook '%s' failed to start",
273 if (strbuf_read(&buf
, child
.out
, 0) < 0) {
274 logerror("failed to read from pipe to daemon access hook '%s'",
279 if (close(child
.out
) < 0) {
280 logerror("failed to close pipe to daemon access hook '%s'",
284 if (finish_command(&child
))
288 strbuf_release(&buf
);
295 strbuf_addstr(&buf
, "service rejected");
296 eol
= strchr(buf
.buf
, '\n');
300 daemon_error(dir
, buf
.buf
);
301 strbuf_release(&buf
);
305 static int run_service(const char *dir
, struct daemon_service
*service
)
308 int enabled
= service
->enabled
;
309 struct strbuf var
= STRBUF_INIT
;
311 loginfo("Request %s for '%s'", service
->name
, dir
);
313 if (!enabled
&& !service
->overridable
) {
314 logerror("'%s': service not enabled.", service
->name
);
316 return daemon_error(dir
, "service not enabled");
319 if (!(path
= path_ok(dir
)))
320 return daemon_error(dir
, "no such repository");
323 * Security on the cheap.
325 * We want a readable HEAD, usable "objects" directory, and
326 * a "git-daemon-export-ok" flag that says that the other side
327 * is ok with us doing this.
329 * path_ok() uses enter_repo() and does whitelist checking.
330 * We only need to make sure the repository is exported.
333 if (!export_all_trees
&& access("git-daemon-export-ok", F_OK
)) {
334 logerror("'%s': repository not exported.", path
);
336 return daemon_error(dir
, "repository not exported");
339 if (service
->overridable
) {
340 strbuf_addf(&var
, "daemon.%s", service
->config_name
);
341 git_config_get_bool(var
.buf
, &enabled
);
342 strbuf_release(&var
);
345 logerror("'%s': service not enabled for '%s'",
346 service
->name
, path
);
348 return daemon_error(dir
, "service not enabled");
352 * Optionally, a hook can choose to deny access to the
353 * repository depending on the phase of the moon.
355 if (access_hook
&& run_access_hook(service
, dir
, path
))
359 * We'll ignore SIGTERM from now on, we have a
362 signal(SIGTERM
, SIG_IGN
);
364 return service
->fn();
367 static void copy_to_log(int fd
)
369 struct strbuf line
= STRBUF_INIT
;
372 fp
= fdopen(fd
, "r");
374 logerror("fdopen of error channel failed");
379 while (strbuf_getline(&line
, fp
, '\n') != EOF
) {
380 logerror("%s", line
.buf
);
381 strbuf_setlen(&line
, 0);
384 strbuf_release(&line
);
388 static int run_service_command(const char **argv
)
390 struct child_process cld
= CHILD_PROCESS_INIT
;
395 if (start_command(&cld
))
401 copy_to_log(cld
.err
);
403 return finish_command(&cld
);
406 static int upload_pack(void)
408 /* Timeout as string */
409 char timeout_buf
[64];
410 const char *argv
[] = { "upload-pack", "--strict", NULL
, ".", NULL
};
412 argv
[2] = timeout_buf
;
414 snprintf(timeout_buf
, sizeof timeout_buf
, "--timeout=%u", timeout
);
415 return run_service_command(argv
);
418 static int upload_archive(void)
420 static const char *argv
[] = { "upload-archive", ".", NULL
};
421 return run_service_command(argv
);
424 static int receive_pack(void)
426 static const char *argv
[] = { "receive-pack", ".", NULL
};
427 return run_service_command(argv
);
430 static struct daemon_service daemon_service
[] = {
431 { "upload-archive", "uploadarch", upload_archive
, 0, 1 },
432 { "upload-pack", "uploadpack", upload_pack
, 1, 1 },
433 { "receive-pack", "receivepack", receive_pack
, 0, 1 },
436 static void enable_service(const char *name
, int ena
)
439 for (i
= 0; i
< ARRAY_SIZE(daemon_service
); i
++) {
440 if (!strcmp(daemon_service
[i
].name
, name
)) {
441 daemon_service
[i
].enabled
= ena
;
445 die("No such service %s", name
);
448 static void make_service_overridable(const char *name
, int ena
)
451 for (i
= 0; i
< ARRAY_SIZE(daemon_service
); i
++) {
452 if (!strcmp(daemon_service
[i
].name
, name
)) {
453 daemon_service
[i
].overridable
= ena
;
457 die("No such service %s", name
);
460 static void parse_host_and_port(char *hostport
, char **host
,
463 if (*hostport
== '[') {
466 end
= strchr(hostport
, ']');
468 die("Invalid request ('[' without ']')");
470 *host
= hostport
+ 1;
473 else if (end
[1] == ':')
476 die("Garbage after end of host part");
479 *port
= strrchr(hostport
, ':');
488 * Sanitize a string from the client so that it's OK to be inserted into a
489 * filesystem path. Specifically, we disallow slashes, runs of "..", and
490 * trailing and leading dots, which means that the client cannot escape
491 * our base path via ".." traversal.
493 static void sanitize_client_strbuf(struct strbuf
*out
, const char *in
)
498 if (*in
== '.' && (!out
->len
|| out
->buf
[out
->len
- 1] == '.'))
500 strbuf_addch(out
, *in
);
503 while (out
->len
&& out
->buf
[out
->len
- 1] == '.')
504 strbuf_setlen(out
, out
->len
- 1);
507 static char *sanitize_client(const char *in
)
509 struct strbuf out
= STRBUF_INIT
;
510 sanitize_client_strbuf(&out
, in
);
511 return strbuf_detach(&out
, NULL
);
515 * Like sanitize_client, but we also perform any canonicalization
516 * to make life easier on the admin.
518 static char *canonicalize_client(const char *in
)
520 struct strbuf out
= STRBUF_INIT
;
521 sanitize_client_strbuf(&out
, in
);
522 strbuf_tolower(&out
);
523 return strbuf_detach(&out
, NULL
);
527 * Read the host as supplied by the client connection.
529 static void parse_host_arg(char *extra_args
, int buflen
)
533 char *end
= extra_args
+ buflen
;
535 if (extra_args
< end
&& *extra_args
) {
536 saw_extended_args
= 1;
537 if (strncasecmp("host=", extra_args
, 5) == 0) {
538 val
= extra_args
+ 5;
539 vallen
= strlen(val
) + 1;
541 /* Split <host>:<port> at colon. */
544 parse_host_and_port(val
, &host
, &port
);
547 tcp_port
= sanitize_client(port
);
550 hostname
= canonicalize_client(host
);
553 /* On to the next one */
554 extra_args
= val
+ vallen
;
556 if (extra_args
< end
&& *extra_args
)
557 die("Invalid request");
561 * Locate canonical hostname and its IP address.
565 struct addrinfo hints
;
568 static char addrbuf
[HOST_NAME_MAX
+ 1];
570 memset(&hints
, 0, sizeof(hints
));
571 hints
.ai_flags
= AI_CANONNAME
;
573 gai
= getaddrinfo(hostname
, NULL
, &hints
, &ai
);
575 struct sockaddr_in
*sin_addr
= (void *)ai
->ai_addr
;
577 inet_ntop(AF_INET
, &sin_addr
->sin_addr
,
578 addrbuf
, sizeof(addrbuf
));
580 ip_address
= xstrdup(addrbuf
);
582 free(canon_hostname
);
583 canon_hostname
= ai
->ai_canonname
?
584 sanitize_client(ai
->ai_canonname
) :
590 struct hostent
*hent
;
591 struct sockaddr_in sa
;
593 static char addrbuf
[HOST_NAME_MAX
+ 1];
595 hent
= gethostbyname(hostname
);
597 ap
= hent
->h_addr_list
;
598 memset(&sa
, 0, sizeof sa
);
599 sa
.sin_family
= hent
->h_addrtype
;
600 sa
.sin_port
= htons(0);
601 memcpy(&sa
.sin_addr
, *ap
, hent
->h_length
);
603 inet_ntop(hent
->h_addrtype
, &sa
.sin_addr
,
604 addrbuf
, sizeof(addrbuf
));
606 free(canon_hostname
);
607 canon_hostname
= sanitize_client(hent
->h_name
);
609 ip_address
= xstrdup(addrbuf
);
616 static int execute(void)
618 char *line
= packet_buffer
;
620 char *addr
= getenv("REMOTE_ADDR"), *port
= getenv("REMOTE_PORT");
623 loginfo("Connection from %s:%s", addr
, port
);
625 alarm(init_timeout
? init_timeout
: timeout
);
626 pktlen
= packet_read(0, NULL
, NULL
, packet_buffer
, sizeof(packet_buffer
), 0);
631 loginfo("Extended attributes (%d bytes) exist <%.*s>",
633 (int) pktlen
- len
, line
+ len
+ 1);
634 if (len
&& line
[len
-1] == '\n') {
640 free(canon_hostname
);
643 hostname
= canon_hostname
= ip_address
= tcp_port
= NULL
;
646 parse_host_arg(line
+ len
+ 1, pktlen
- len
- 1);
648 for (i
= 0; i
< ARRAY_SIZE(daemon_service
); i
++) {
649 struct daemon_service
*s
= &(daemon_service
[i
]);
652 if (skip_prefix(line
, "git-", &arg
) &&
653 skip_prefix(arg
, s
->name
, &arg
) &&
656 * Note: The directory here is probably context sensitive,
657 * and might depend on the actual service being performed.
659 return run_service(arg
, s
);
663 logerror("Protocol error: '%s'", line
);
667 static int addrcmp(const struct sockaddr_storage
*s1
,
668 const struct sockaddr_storage
*s2
)
670 const struct sockaddr
*sa1
= (const struct sockaddr
*) s1
;
671 const struct sockaddr
*sa2
= (const struct sockaddr
*) s2
;
673 if (sa1
->sa_family
!= sa2
->sa_family
)
674 return sa1
->sa_family
- sa2
->sa_family
;
675 if (sa1
->sa_family
== AF_INET
)
676 return memcmp(&((struct sockaddr_in
*)s1
)->sin_addr
,
677 &((struct sockaddr_in
*)s2
)->sin_addr
,
678 sizeof(struct in_addr
));
680 if (sa1
->sa_family
== AF_INET6
)
681 return memcmp(&((struct sockaddr_in6
*)s1
)->sin6_addr
,
682 &((struct sockaddr_in6
*)s2
)->sin6_addr
,
683 sizeof(struct in6_addr
));
688 static int max_connections
= 32;
690 static unsigned int live_children
;
692 static struct child
{
694 struct child_process cld
;
695 struct sockaddr_storage address
;
698 static void add_child(struct child_process
*cld
, struct sockaddr
*addr
, socklen_t addrlen
)
700 struct child
*newborn
, **cradle
;
702 newborn
= xcalloc(1, sizeof(*newborn
));
704 memcpy(&newborn
->cld
, cld
, sizeof(*cld
));
705 memcpy(&newborn
->address
, addr
, addrlen
);
706 for (cradle
= &firstborn
; *cradle
; cradle
= &(*cradle
)->next
)
707 if (!addrcmp(&(*cradle
)->address
, &newborn
->address
))
709 newborn
->next
= *cradle
;
714 * This gets called if the number of connections grows
715 * past "max_connections".
717 * We kill the newest connection from a duplicate IP.
719 static void kill_some_child(void)
721 const struct child
*blanket
, *next
;
723 if (!(blanket
= firstborn
))
726 for (; (next
= blanket
->next
); blanket
= next
)
727 if (!addrcmp(&blanket
->address
, &next
->address
)) {
728 kill(blanket
->cld
.pid
, SIGTERM
);
733 static void check_dead_children(void)
738 struct child
**cradle
, *blanket
;
739 for (cradle
= &firstborn
; (blanket
= *cradle
);)
740 if ((pid
= waitpid(blanket
->cld
.pid
, &status
, WNOHANG
)) > 1) {
741 const char *dead
= "";
743 dead
= " (with error)";
744 loginfo("[%"PRIuMAX
"] Disconnected%s", (uintmax_t)pid
, dead
);
746 /* remove the child */
747 *cradle
= blanket
->next
;
751 cradle
= &blanket
->next
;
754 static char **cld_argv
;
755 static void handle(int incoming
, struct sockaddr
*addr
, socklen_t addrlen
)
757 struct child_process cld
= CHILD_PROCESS_INIT
;
758 char addrbuf
[300] = "REMOTE_ADDR=", portbuf
[300];
759 char *env
[] = { addrbuf
, portbuf
, NULL
};
761 if (max_connections
&& live_children
>= max_connections
) {
763 sleep(1); /* give it some time to die */
764 check_dead_children();
765 if (live_children
>= max_connections
) {
767 logerror("Too many children, dropping connection");
772 if (addr
->sa_family
== AF_INET
) {
773 struct sockaddr_in
*sin_addr
= (void *) addr
;
774 inet_ntop(addr
->sa_family
, &sin_addr
->sin_addr
, addrbuf
+ 12,
775 sizeof(addrbuf
) - 12);
776 snprintf(portbuf
, sizeof(portbuf
), "REMOTE_PORT=%d",
777 ntohs(sin_addr
->sin_port
));
779 } else if (addr
->sa_family
== AF_INET6
) {
780 struct sockaddr_in6
*sin6_addr
= (void *) addr
;
782 char *buf
= addrbuf
+ 12;
783 *buf
++ = '['; *buf
= '\0'; /* stpcpy() is cool */
784 inet_ntop(AF_INET6
, &sin6_addr
->sin6_addr
, buf
,
785 sizeof(addrbuf
) - 13);
788 snprintf(portbuf
, sizeof(portbuf
), "REMOTE_PORT=%d",
789 ntohs(sin6_addr
->sin6_port
));
793 cld
.env
= (const char **)env
;
794 cld
.argv
= (const char **)cld_argv
;
796 cld
.out
= dup(incoming
);
798 if (start_command(&cld
))
799 logerror("unable to fork");
801 add_child(&cld
, addr
, addrlen
);
804 static void child_handler(int signo
)
807 * Otherwise empty handler because systemcalls will get interrupted
808 * upon signal receipt
809 * SysV needs the handler to be rearmed
811 signal(SIGCHLD
, child_handler
);
814 static int set_reuse_addr(int sockfd
)
820 return setsockopt(sockfd
, SOL_SOCKET
, SO_REUSEADDR
,
830 static const char *ip2str(int family
, struct sockaddr
*sin
, socklen_t len
)
833 static char ip
[INET_ADDRSTRLEN
];
835 static char ip
[INET6_ADDRSTRLEN
];
841 inet_ntop(family
, &((struct sockaddr_in6
*)sin
)->sin6_addr
, ip
, len
);
845 inet_ntop(family
, &((struct sockaddr_in
*)sin
)->sin_addr
, ip
, len
);
848 strcpy(ip
, "<unknown>");
855 static int setup_named_sock(char *listen_addr
, int listen_port
, struct socketlist
*socklist
)
858 char pbuf
[NI_MAXSERV
];
859 struct addrinfo hints
, *ai0
, *ai
;
863 sprintf(pbuf
, "%d", listen_port
);
864 memset(&hints
, 0, sizeof(hints
));
865 hints
.ai_family
= AF_UNSPEC
;
866 hints
.ai_socktype
= SOCK_STREAM
;
867 hints
.ai_protocol
= IPPROTO_TCP
;
868 hints
.ai_flags
= AI_PASSIVE
;
870 gai
= getaddrinfo(listen_addr
, pbuf
, &hints
, &ai0
);
872 logerror("getaddrinfo() for %s failed: %s", listen_addr
, gai_strerror(gai
));
876 for (ai
= ai0
; ai
; ai
= ai
->ai_next
) {
879 sockfd
= socket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
);
882 if (sockfd
>= FD_SETSIZE
) {
883 logerror("Socket descriptor too large");
889 if (ai
->ai_family
== AF_INET6
) {
891 setsockopt(sockfd
, IPPROTO_IPV6
, IPV6_V6ONLY
,
893 /* Note: error is not fatal */
897 if (set_reuse_addr(sockfd
)) {
898 logerror("Could not set SO_REUSEADDR: %s", strerror(errno
));
903 if (bind(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0) {
904 logerror("Could not bind to %s: %s",
905 ip2str(ai
->ai_family
, ai
->ai_addr
, ai
->ai_addrlen
),
908 continue; /* not fatal */
910 if (listen(sockfd
, 5) < 0) {
911 logerror("Could not listen to %s: %s",
912 ip2str(ai
->ai_family
, ai
->ai_addr
, ai
->ai_addrlen
),
915 continue; /* not fatal */
918 flags
= fcntl(sockfd
, F_GETFD
, 0);
920 fcntl(sockfd
, F_SETFD
, flags
| FD_CLOEXEC
);
922 ALLOC_GROW(socklist
->list
, socklist
->nr
+ 1, socklist
->alloc
);
923 socklist
->list
[socklist
->nr
++] = sockfd
;
934 static int setup_named_sock(char *listen_addr
, int listen_port
, struct socketlist
*socklist
)
936 struct sockaddr_in sin
;
940 memset(&sin
, 0, sizeof sin
);
941 sin
.sin_family
= AF_INET
;
942 sin
.sin_port
= htons(listen_port
);
945 /* Well, host better be an IP address here. */
946 if (inet_pton(AF_INET
, listen_addr
, &sin
.sin_addr
.s_addr
) <= 0)
949 sin
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
952 sockfd
= socket(AF_INET
, SOCK_STREAM
, 0);
956 if (set_reuse_addr(sockfd
)) {
957 logerror("Could not set SO_REUSEADDR: %s", strerror(errno
));
962 if ( bind(sockfd
, (struct sockaddr
*)&sin
, sizeof sin
) < 0 ) {
963 logerror("Could not bind to %s: %s",
964 ip2str(AF_INET
, (struct sockaddr
*)&sin
, sizeof(sin
)),
970 if (listen(sockfd
, 5) < 0) {
971 logerror("Could not listen to %s: %s",
972 ip2str(AF_INET
, (struct sockaddr
*)&sin
, sizeof(sin
)),
978 flags
= fcntl(sockfd
, F_GETFD
, 0);
980 fcntl(sockfd
, F_SETFD
, flags
| FD_CLOEXEC
);
982 ALLOC_GROW(socklist
->list
, socklist
->nr
+ 1, socklist
->alloc
);
983 socklist
->list
[socklist
->nr
++] = sockfd
;
989 static void socksetup(struct string_list
*listen_addr
, int listen_port
, struct socketlist
*socklist
)
991 if (!listen_addr
->nr
)
992 setup_named_sock(NULL
, listen_port
, socklist
);
995 for (i
= 0; i
< listen_addr
->nr
; i
++) {
996 socknum
= setup_named_sock(listen_addr
->items
[i
].string
,
997 listen_port
, socklist
);
1000 logerror("unable to allocate any listen sockets for host %s on port %u",
1001 listen_addr
->items
[i
].string
, listen_port
);
1006 static int service_loop(struct socketlist
*socklist
)
1011 pfd
= xcalloc(socklist
->nr
, sizeof(struct pollfd
));
1013 for (i
= 0; i
< socklist
->nr
; i
++) {
1014 pfd
[i
].fd
= socklist
->list
[i
];
1015 pfd
[i
].events
= POLLIN
;
1018 signal(SIGCHLD
, child_handler
);
1023 check_dead_children();
1025 if (poll(pfd
, socklist
->nr
, -1) < 0) {
1026 if (errno
!= EINTR
) {
1027 logerror("Poll failed, resuming: %s",
1034 for (i
= 0; i
< socklist
->nr
; i
++) {
1035 if (pfd
[i
].revents
& POLLIN
) {
1038 struct sockaddr_in sai
;
1040 struct sockaddr_in6 sai6
;
1043 socklen_t sslen
= sizeof(ss
);
1044 int incoming
= accept(pfd
[i
].fd
, &ss
.sa
, &sslen
);
1052 die_errno("accept returned");
1055 handle(incoming
, &ss
.sa
, sslen
);
1061 #ifdef NO_POSIX_GOODIES
1065 static void drop_privileges(struct credentials
*cred
)
1070 static struct credentials
*prepare_credentials(const char *user_name
,
1071 const char *group_name
)
1073 die("--user not supported on this platform");
1078 struct credentials
{
1079 struct passwd
*pass
;
1083 static void drop_privileges(struct credentials
*cred
)
1085 if (cred
&& (initgroups(cred
->pass
->pw_name
, cred
->gid
) ||
1086 setgid (cred
->gid
) || setuid(cred
->pass
->pw_uid
)))
1087 die("cannot drop privileges");
1090 static struct credentials
*prepare_credentials(const char *user_name
,
1091 const char *group_name
)
1093 static struct credentials c
;
1095 c
.pass
= getpwnam(user_name
);
1097 die("user not found - %s", user_name
);
1100 c
.gid
= c
.pass
->pw_gid
;
1102 struct group
*group
= getgrnam(group_name
);
1104 die("group not found - %s", group_name
);
1106 c
.gid
= group
->gr_gid
;
1113 static void store_pid(const char *path
)
1115 FILE *f
= fopen(path
, "w");
1117 die_errno("cannot open pid file '%s'", path
);
1118 if (fprintf(f
, "%"PRIuMAX
"\n", (uintmax_t) getpid()) < 0 || fclose(f
) != 0)
1119 die_errno("failed to write pid file '%s'", path
);
1122 static int serve(struct string_list
*listen_addr
, int listen_port
,
1123 struct credentials
*cred
)
1125 struct socketlist socklist
= { NULL
, 0, 0 };
1127 socksetup(listen_addr
, listen_port
, &socklist
);
1128 if (socklist
.nr
== 0)
1129 die("unable to allocate any listen sockets on port %u",
1132 drop_privileges(cred
);
1134 loginfo("Ready to rumble");
1136 return service_loop(&socklist
);
1139 int main(int argc
, char **argv
)
1141 int listen_port
= 0;
1142 struct string_list listen_addr
= STRING_LIST_INIT_NODUP
;
1143 int serve_mode
= 0, inetd_mode
= 0;
1144 const char *pid_file
= NULL
, *user_name
= NULL
, *group_name
= NULL
;
1146 struct credentials
*cred
= NULL
;
1149 git_setup_gettext();
1151 git_extract_argv0_path(argv
[0]);
1153 for (i
= 1; i
< argc
; i
++) {
1154 char *arg
= argv
[i
];
1157 if (skip_prefix(arg
, "--listen=", &v
)) {
1158 string_list_append(&listen_addr
, xstrdup_tolower(v
));
1161 if (skip_prefix(arg
, "--port=", &v
)) {
1164 n
= strtoul(v
, &end
, 0);
1170 if (!strcmp(arg
, "--serve")) {
1174 if (!strcmp(arg
, "--inetd")) {
1179 if (!strcmp(arg
, "--verbose")) {
1183 if (!strcmp(arg
, "--syslog")) {
1187 if (!strcmp(arg
, "--export-all")) {
1188 export_all_trees
= 1;
1191 if (skip_prefix(arg
, "--access-hook=", &v
)) {
1195 if (skip_prefix(arg
, "--timeout=", &v
)) {
1199 if (skip_prefix(arg
, "--init-timeout=", &v
)) {
1200 init_timeout
= atoi(v
);
1203 if (skip_prefix(arg
, "--max-connections=", &v
)) {
1204 max_connections
= atoi(v
);
1205 if (max_connections
< 0)
1206 max_connections
= 0; /* unlimited */
1209 if (!strcmp(arg
, "--strict-paths")) {
1213 if (skip_prefix(arg
, "--base-path=", &v
)) {
1217 if (!strcmp(arg
, "--base-path-relaxed")) {
1218 base_path_relaxed
= 1;
1221 if (skip_prefix(arg
, "--interpolated-path=", &v
)) {
1222 interpolated_path
= v
;
1225 if (!strcmp(arg
, "--reuseaddr")) {
1229 if (!strcmp(arg
, "--user-path")) {
1233 if (skip_prefix(arg
, "--user-path=", &v
)) {
1237 if (skip_prefix(arg
, "--pid-file=", &v
)) {
1241 if (!strcmp(arg
, "--detach")) {
1246 if (skip_prefix(arg
, "--user=", &v
)) {
1250 if (skip_prefix(arg
, "--group=", &v
)) {
1254 if (skip_prefix(arg
, "--enable=", &v
)) {
1255 enable_service(v
, 1);
1258 if (skip_prefix(arg
, "--disable=", &v
)) {
1259 enable_service(v
, 0);
1262 if (skip_prefix(arg
, "--allow-override=", &v
)) {
1263 make_service_overridable(v
, 1);
1266 if (skip_prefix(arg
, "--forbid-override=", &v
)) {
1267 make_service_overridable(v
, 0);
1270 if (!strcmp(arg
, "--informative-errors")) {
1271 informative_errors
= 1;
1274 if (!strcmp(arg
, "--no-informative-errors")) {
1275 informative_errors
= 0;
1278 if (!strcmp(arg
, "--")) {
1279 ok_paths
= &argv
[i
+1];
1281 } else if (arg
[0] != '-') {
1282 ok_paths
= &argv
[i
];
1286 usage(daemon_usage
);
1290 openlog("git-daemon", LOG_PID
, LOG_DAEMON
);
1291 set_die_routine(daemon_die
);
1293 /* avoid splitting a message in the middle */
1294 setvbuf(stderr
, NULL
, _IOFBF
, 4096);
1296 if (inetd_mode
&& (detach
|| group_name
|| user_name
))
1297 die("--detach, --user and --group are incompatible with --inetd");
1299 if (inetd_mode
&& (listen_port
|| (listen_addr
.nr
> 0)))
1300 die("--listen= and --port= are incompatible with --inetd");
1301 else if (listen_port
== 0)
1302 listen_port
= DEFAULT_GIT_PORT
;
1304 if (group_name
&& !user_name
)
1305 die("--group supplied without --user");
1308 cred
= prepare_credentials(user_name
, group_name
);
1310 if (strict_paths
&& (!ok_paths
|| !*ok_paths
))
1311 die("option --strict-paths requires a whitelist");
1313 if (base_path
&& !is_directory(base_path
))
1314 die("base-path '%s' does not exist or is not a directory",
1318 if (!freopen("/dev/null", "w", stderr
))
1319 die_errno("failed to redirect stderr to /dev/null");
1322 if (inetd_mode
|| serve_mode
)
1327 die("--detach not supported on this platform");
1332 store_pid(pid_file
);
1334 /* prepare argv for serving-processes */
1335 cld_argv
= xmalloc(sizeof (char *) * (argc
+ 2));
1336 cld_argv
[0] = argv
[0]; /* git-daemon */
1337 cld_argv
[1] = "--serve";
1338 for (i
= 1; i
< argc
; ++i
)
1339 cld_argv
[i
+1] = argv
[i
];
1340 cld_argv
[argc
+1] = NULL
;
1342 return serve(&listen_addr
, listen_port
, cred
);