#include "cache.h" #include "pkt-line.h" #include "exec_cmd.h" #include "interpolate.h" #include <syslog.h> #ifndef HOST_NAME_MAX #define HOST_NAME_MAX 256 #endif static int log_syslog; static int verbose; static int reuseaddr; static const char daemon_usage[] = "git-daemon [--verbose] [--syslog] [--export-all]\n" " [--timeout=n] [--init-timeout=n] [--strict-paths]\n" " [--base-path=path] [--base-path-relaxed]\n" " [--user-path | --user-path=path]\n" " [--interpolated-path=path]\n" " [--reuseaddr] [--detach] [--pid-file=file]\n" " [--[enable|disable|allow-override|forbid-override]=service]\n" " [--inetd | [--listen=host_or_ipaddr] [--port=n]\n" " [--user=user [--group=group]]\n" " [directory...]"; /* List of acceptable pathname prefixes */ static char **ok_paths; static int strict_paths; /* If this is set, git-daemon-export-ok is not required */ static int export_all_trees; /* Take all paths relative to this one if non-NULL */ static char *base_path; static char *interpolated_path; static int base_path_relaxed; /* Flag indicating client sent extra args. */ static int saw_extended_args; /* If defined, ~user notation is allowed and the string is inserted * after ~user/. E.g. a request to git://host/~alice/frotz would * go to /home/alice/pub_git/frotz with --user-path=pub_git. */ static const char *user_path; /* Timeout, and initial timeout */ static unsigned int timeout; static unsigned int init_timeout; /* * Static table for now. Ugh. * Feel free to make dynamic as needed. */ #define INTERP_SLOT_HOST (0) #define INTERP_SLOT_CANON_HOST (1) #define INTERP_SLOT_IP (2) #define INTERP_SLOT_PORT (3) #define INTERP_SLOT_DIR (4) #define INTERP_SLOT_PERCENT (5) static struct interp interp_table[] = { { "%H", 0}, { "%CH", 0}, { "%IP", 0}, { "%P", 0}, { "%D", 0}, { "%%", 0}, }; static void logreport(int priority, const char *err, va_list params) { /* We should do a single write so that it is atomic and output * of several processes do not get intermingled. */ char buf[1024]; int buflen; int maxlen, msglen; /* sizeof(buf) should be big enough for "[pid] \n" */ buflen = snprintf(buf, sizeof(buf), "[%ld] ", (long) getpid()); maxlen = sizeof(buf) - buflen - 1; /* -1 for our own LF */ msglen = vsnprintf(buf + buflen, maxlen, err, params); if (log_syslog) { syslog(priority, "%s", buf); return; } /* maxlen counted our own LF but also counts space given to * vsnprintf for the terminating NUL. We want to make sure that * we have space for our own LF and NUL after the "meat" of the * message, so truncate it at maxlen - 1. */ if (msglen > maxlen - 1) msglen = maxlen - 1; else if (msglen < 0) msglen = 0; /* Protect against weird return values. */ buflen += msglen; buf[buflen++] = '\n'; buf[buflen] = '\0'; write_in_full(2, buf, buflen); } static void logerror(const char *err, ...) { va_list params; va_start(params, err); logreport(LOG_ERR, err, params); va_end(params); } static void loginfo(const char *err, ...) { va_list params; if (!verbose) return; va_start(params, err); logreport(LOG_INFO, err, params); va_end(params); } static void NORETURN daemon_die(const char *err, va_list params) { logreport(LOG_ERR, err, params); exit(1); } static int avoid_alias(char *p) { int sl, ndot; /* * This resurrects the belts and suspenders paranoia check by HPA * done in <435560F7.4080006@zytor.com> thread, now enter_repo() * does not do getcwd() based path canonicalizations. * * sl becomes true immediately after seeing '/' and continues to * be true as long as dots continue after that without intervening * non-dot character. */ if (!p || (*p != '/' && *p != '~')) return -1; sl = 1; ndot = 0; p++; while (1) { char ch = *p++; if (sl) { if (ch == '.') ndot++; else if (ch == '/') { if (ndot < 3) /* reject //, /./ and /../ */ return -1; ndot = 0; } else if (ch == 0) { if (0 < ndot && ndot < 3) /* reject /.$ and /..$ */ return -1; return 0; } else sl = ndot = 0; } else if (ch == 0) return 0; else if (ch == '/') { sl = 1; ndot = 0; } } } static char *path_ok(struct interp *itable) { static char rpath[PATH_MAX]; static char interp_path[PATH_MAX]; int retried_path = 0; char *path; char *dir; dir = itable[INTERP_SLOT_DIR].value; if (avoid_alias(dir)) { logerror("'%s': aliased", dir); return NULL; } if (*dir == '~') { if (!user_path) { logerror("'%s': User-path not allowed", dir); return NULL; } if (*user_path) { /* Got either "~alice" or "~alice/foo"; * rewrite them to "~alice/%s" or * "~alice/%s/foo". */ int namlen, restlen = strlen(dir); char *slash = strchr(dir, '/'); if (!slash) slash = dir + restlen; namlen = slash - dir; restlen -= namlen; loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", namlen, dir, user_path, restlen, slash); dir = rpath; } } else if (interpolated_path && saw_extended_args) { if (*dir != '/') { /* Allow only absolute */ logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); return NULL; } interpolate(interp_path, PATH_MAX, interpolated_path, interp_table, ARRAY_SIZE(interp_table)); loginfo("Interpolated dir '%s'", interp_path); dir = interp_path; } else if (base_path) { if (*dir != '/') { /* Allow only absolute */ logerror("'%s': Non-absolute path denied (base-path active)", dir); return NULL; } snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); dir = rpath; } do { path = enter_repo(dir, strict_paths); if (path) break; /* * if we fail and base_path_relaxed is enabled, try without * prefixing the base path */ if (base_path && base_path_relaxed && !retried_path) { dir = itable[INTERP_SLOT_DIR].value; retried_path = 1; continue; } break; } while (1); if (!path) { logerror("'%s': unable to chdir or not a git archive", dir); return NULL; } if ( ok_paths && *ok_paths ) { char **pp; int pathlen = strlen(path); /* The validation is done on the paths after enter_repo * appends optional {.git,.git/.git} and friends, but * it does not use getcwd(). So if your /pub is * a symlink to /mnt/pub, you can whitelist /pub and * do not have to say /mnt/pub. * Do not say /pub/. */ for ( pp = ok_paths ; *pp ; pp++ ) { int len = strlen(*pp); if (len <= pathlen && !memcmp(*pp, path, len) && (path[len] == '\0' || (!strict_paths && path[len] == '/'))) return path; } } else { /* be backwards compatible */ if (!strict_paths) return path; } logerror("'%s': not in whitelist", path); return NULL; /* Fallthrough. Deny by default */ } typedef int (*daemon_service_fn)(void); struct daemon_service { const char *name; const char *config_name; daemon_service_fn fn; int enabled; int overridable; }; static struct daemon_service *service_looking_at; static int service_enabled; static int git_daemon_config(const char *var, const char *value) { if (!prefixcmp(var, "daemon.") && !strcmp(var + 7, service_looking_at->config_name)) { service_enabled = git_config_bool(var, value); return 0; } /* we are not interested in parsing any other configuration here */ return 0; } static int run_service(struct interp *itable, struct daemon_service *service) { const char *path; int enabled = service->enabled; loginfo("Request %s for '%s'", service->name, itable[INTERP_SLOT_DIR].value); if (!enabled && !service->overridable) { logerror("'%s': service not enabled.", service->name); errno = EACCES; return -1; } if (!(path = path_ok(itable))) return -1; /* * Security on the cheap. * * We want a readable HEAD, usable "objects" directory, and * a "git-daemon-export-ok" flag that says that the other side * is ok with us doing this. * * path_ok() uses enter_repo() and does whitelist checking. * We only need to make sure the repository is exported. */ if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { logerror("'%s': repository not exported.", path); errno = EACCES; return -1; } if (service->overridable) { service_looking_at = service; service_enabled = -1; git_config(git_daemon_config); if (0 <= service_enabled) enabled = service_enabled; } if (!enabled) { logerror("'%s': service not enabled for '%s'", service->name, path); errno = EACCES; return -1; } /* * We'll ignore SIGTERM from now on, we have a * good client. */ signal(SIGTERM, SIG_IGN); return service->fn(); } static int upload_pack(void) { /* Timeout as string */ char timeout_buf[64]; snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); /* git-upload-pack only ever reads stuff, so this is safe */ execl_git_cmd("upload-pack", "--strict", timeout_buf, ".", NULL); return -1; } static int upload_archive(void) { execl_git_cmd("upload-archive", ".", NULL); return -1; } static int receive_pack(void) { execl_git_cmd("receive-pack", ".", NULL); return -1; } static struct daemon_service daemon_service[] = { { "upload-archive", "uploadarch", upload_archive, 0, 1 }, { "upload-pack", "uploadpack", upload_pack, 1, 1 }, { "receive-pack", "receivepack", receive_pack, 0, 1 }, }; static void enable_service(const char *name, int ena) { int i; for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { if (!strcmp(daemon_service[i].name, name)) { daemon_service[i].enabled = ena; return; } } die("No such service %s", name); } static void make_service_overridable(const char *name, int ena) { int i; for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { if (!strcmp(daemon_service[i].name, name)) { daemon_service[i].overridable = ena; return; } } die("No such service %s", name); } /* * Separate the "extra args" information as supplied by the client connection. * Any resulting data is squirreled away in the given interpolation table. */ static void parse_extra_args(struct interp *table, char *extra_args, int buflen) { char *val; int vallen; char *end = extra_args + buflen; while (extra_args < end && *extra_args) { saw_extended_args = 1; if (strncasecmp("host=", extra_args, 5) == 0) { val = extra_args + 5; vallen = strlen(val) + 1; if (*val) { /* Split <host>:<port> at colon. */ char *host = val; char *port = strrchr(host, ':'); if (port) { *port = 0; port++; interp_set_entry(table, INTERP_SLOT_PORT, port); } interp_set_entry(table, INTERP_SLOT_HOST, host); } /* On to the next one */ extra_args = val + vallen; } } } static void fill_in_extra_table_entries(struct interp *itable) { char *hp; /* * Replace literal host with lowercase-ized hostname. */ hp = interp_table[INTERP_SLOT_HOST].value; if (!hp) return; for ( ; *hp; hp++) *hp = tolower(*hp); /* * Locate canonical hostname and its IP address. */ #ifndef NO_IPV6 { struct addrinfo hints; struct addrinfo *ai, *ai0; int gai; static char addrbuf[HOST_NAME_MAX + 1]; memset(&hints, 0, sizeof(hints)); hints.ai_flags = AI_CANONNAME; gai = getaddrinfo(interp_table[INTERP_SLOT_HOST].value, 0, &hints, &ai0); if (!gai) { for (ai = ai0; ai; ai = ai->ai_next) { struct sockaddr_in *sin_addr = (void *)ai->ai_addr; inet_ntop(AF_INET, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); interp_set_entry(interp_table, INTERP_SLOT_CANON_HOST, ai->ai_canonname); interp_set_entry(interp_table, INTERP_SLOT_IP, addrbuf); break; } freeaddrinfo(ai0); } } #else { struct hostent *hent; struct sockaddr_in sa; char **ap; static char addrbuf[HOST_NAME_MAX + 1]; hent = gethostbyname(interp_table[INTERP_SLOT_HOST].value); ap = hent->h_addr_list; memset(&sa, 0, sizeof sa); sa.sin_family = hent->h_addrtype; sa.sin_port = htons(0); memcpy(&sa.sin_addr, *ap, hent->h_length); inet_ntop(hent->h_addrtype, &sa.sin_addr, addrbuf, sizeof(addrbuf)); interp_set_entry(interp_table, INTERP_SLOT_CANON_HOST, hent->h_name); interp_set_entry(interp_table, INTERP_SLOT_IP, addrbuf); } #endif } static int execute(struct sockaddr *addr) { static char line[1000]; int pktlen, len, i; if (addr) { char addrbuf[256] = ""; int port = -1; if (addr->sa_family == AF_INET) { struct sockaddr_in *sin_addr = (void *) addr; inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); port = sin_addr->sin_port; #ifndef NO_IPV6 } else if (addr && addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6_addr = (void *) addr; char *buf = addrbuf; *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); strcat(buf, "]"); port = sin6_addr->sin6_port; #endif } loginfo("Connection from %s:%d", addrbuf, port); } alarm(init_timeout ? init_timeout : timeout); pktlen = packet_read_line(0, line, sizeof(line)); alarm(0); len = strlen(line); if (pktlen != len) loginfo("Extended attributes (%d bytes) exist <%.*s>", (int) pktlen - len, (int) pktlen - len, line + len + 1); if (len && line[len-1] == '\n') { line[--len] = 0; pktlen--; } /* * Initialize the path interpolation table for this connection. */ interp_clear_table(interp_table, ARRAY_SIZE(interp_table)); interp_set_entry(interp_table, INTERP_SLOT_PERCENT, "%"); if (len != pktlen) { parse_extra_args(interp_table, line + len + 1, pktlen - len - 1); fill_in_extra_table_entries(interp_table); } for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { struct daemon_service *s = &(daemon_service[i]); int namelen = strlen(s->name); if (!prefixcmp(line, "git-") && !strncmp(s->name, line + 4, namelen) && line[namelen + 4] == ' ') { /* * Note: The directory here is probably context sensitive, * and might depend on the actual service being performed. */ interp_set_entry(interp_table, INTERP_SLOT_DIR, line + namelen + 5); return run_service(interp_table, s); } } logerror("Protocol error: '%s'", line); return -1; } /* * We count spawned/reaped separately, just to avoid any * races when updating them from signals. The SIGCHLD handler * will only update children_reaped, and the fork logic will * only update children_spawned. * * MAX_CHILDREN should be a power-of-two to make the modulus * operation cheap. It should also be at least twice * the maximum number of connections we will ever allow. */ #define MAX_CHILDREN 128 static int max_connections = 25; /* These are updated by the signal handler */ static volatile unsigned int children_reaped; static pid_t dead_child[MAX_CHILDREN]; /* These are updated by the main loop */ static unsigned int children_spawned; static unsigned int children_deleted; static struct child { pid_t pid; int addrlen; struct sockaddr_storage address; } live_child[MAX_CHILDREN]; static void add_child(int idx, pid_t pid, struct sockaddr *addr, int addrlen) { live_child[idx].pid = pid; live_child[idx].addrlen = addrlen; memcpy(&live_child[idx].address, addr, addrlen); } /* * Walk from "deleted" to "spawned", and remove child "pid". * * We move everything up by one, since the new "deleted" will * be one higher. */ static void remove_child(pid_t pid, unsigned deleted, unsigned spawned) { struct child n; deleted %= MAX_CHILDREN; spawned %= MAX_CHILDREN; if (live_child[deleted].pid == pid) { live_child[deleted].pid = -1; return; } n = live_child[deleted]; for (;;) { struct child m; deleted = (deleted + 1) % MAX_CHILDREN; if (deleted == spawned) die("could not find dead child %d\n", pid); m = live_child[deleted]; live_child[deleted] = n; if (m.pid == pid) return; n = m; } } /* * This gets called if the number of connections grows * past "max_connections". * * We _should_ start off by searching for connections * from the same IP, and if there is some address wth * multiple connections, we should kill that first. * * As it is, we just "randomly" kill 25% of the connections, * and our pseudo-random generator sucks too. I have no * shame. * * Really, this is just a place-holder for a _real_ algorithm. */ static void kill_some_children(int signo, unsigned start, unsigned stop) { start %= MAX_CHILDREN; stop %= MAX_CHILDREN; while (start != stop) { if (!(start & 3)) kill(live_child[start].pid, signo); start = (start + 1) % MAX_CHILDREN; } } static void check_max_connections(void) { for (;;) { int active; unsigned spawned, reaped, deleted; spawned = children_spawned; reaped = children_reaped; deleted = children_deleted; while (deleted < reaped) { pid_t pid = dead_child[deleted % MAX_CHILDREN]; remove_child(pid, deleted, spawned); deleted++; } children_deleted = deleted; active = spawned - deleted; if (active <= max_connections) break; /* Kill some unstarted connections with SIGTERM */ kill_some_children(SIGTERM, deleted, spawned); if (active <= max_connections << 1) break; /* If the SIGTERM thing isn't helping use SIGKILL */ kill_some_children(SIGKILL, deleted, spawned); sleep(1); } } static void handle(int incoming, struct sockaddr *addr, int addrlen) { pid_t pid = fork(); if (pid) { unsigned idx; close(incoming); if (pid < 0) return; idx = children_spawned % MAX_CHILDREN; children_spawned++; add_child(idx, pid, addr, addrlen); check_max_connections(); return; } dup2(incoming, 0); dup2(incoming, 1); close(incoming); exit(execute(addr)); } static void child_handler(int signo) { for (;;) { int status; pid_t pid = waitpid(-1, &status, WNOHANG); if (pid > 0) { unsigned reaped = children_reaped; dead_child[reaped % MAX_CHILDREN] = pid; children_reaped = reaped + 1; /* XXX: Custom logging, since we don't wanna getpid() */ if (verbose) { const char *dead = ""; if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) dead = " (with error)"; if (log_syslog) syslog(LOG_INFO, "[%d] Disconnected%s", pid, dead); else fprintf(stderr, "[%d] Disconnected%s\n", pid, dead); } continue; } break; } } static int set_reuse_addr(int sockfd) { int on = 1; if (!reuseaddr) return 0; return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); } #ifndef NO_IPV6 static int socksetup(char *listen_addr, int listen_port, int **socklist_p) { int socknum = 0, *socklist = NULL; int maxfd = -1; char pbuf[NI_MAXSERV]; struct addrinfo hints, *ai0, *ai; int gai; long flags; sprintf(pbuf, "%d", listen_port); memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; hints.ai_flags = AI_PASSIVE; gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); if (gai) die("getaddrinfo() failed: %s\n", gai_strerror(gai)); for (ai = ai0; ai; ai = ai->ai_next) { int sockfd; sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (sockfd < 0) continue; if (sockfd >= FD_SETSIZE) { error("too large socket descriptor."); close(sockfd); continue; } #ifdef IPV6_V6ONLY if (ai->ai_family == AF_INET6) { int on = 1; setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)); /* Note: error is not fatal */ } #endif if (set_reuse_addr(sockfd)) { close(sockfd); continue; } if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { close(sockfd); continue; /* not fatal */ } if (listen(sockfd, 5) < 0) { close(sockfd); continue; /* not fatal */ } flags = fcntl(sockfd, F_GETFD, 0); if (flags >= 0) fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); socklist[socknum++] = sockfd; if (maxfd < sockfd) maxfd = sockfd; } freeaddrinfo(ai0); *socklist_p = socklist; return socknum; } #else /* NO_IPV6 */ static int socksetup(char *listen_addr, int listen_port, int **socklist_p) { struct sockaddr_in sin; int sockfd; long flags; memset(&sin, 0, sizeof sin); sin.sin_family = AF_INET; sin.sin_port = htons(listen_port); if (listen_addr) { /* Well, host better be an IP address here. */ if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) return 0; } else { sin.sin_addr.s_addr = htonl(INADDR_ANY); } sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) return 0; if (set_reuse_addr(sockfd)) { close(sockfd); return 0; } if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { close(sockfd); return 0; } if (listen(sockfd, 5) < 0) { close(sockfd); return 0; } flags = fcntl(sockfd, F_GETFD, 0); if (flags >= 0) fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); *socklist_p = xmalloc(sizeof(int)); **socklist_p = sockfd; return 1; } #endif static int service_loop(int socknum, int *socklist) { struct pollfd *pfd; int i; pfd = xcalloc(socknum, sizeof(struct pollfd)); for (i = 0; i < socknum; i++) { pfd[i].fd = socklist[i]; pfd[i].events = POLLIN; } signal(SIGCHLD, child_handler); for (;;) { int i; if (poll(pfd, socknum, -1) < 0) { if (errno != EINTR) { error("poll failed, resuming: %s", strerror(errno)); sleep(1); } continue; } for (i = 0; i < socknum; i++) { if (pfd[i].revents & POLLIN) { struct sockaddr_storage ss; unsigned int sslen = sizeof(ss); int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); if (incoming < 0) { switch (errno) { case EAGAIN: case EINTR: case ECONNABORTED: continue; default: die("accept returned %s", strerror(errno)); } } handle(incoming, (struct sockaddr *)&ss, sslen); } } } } /* if any standard file descriptor is missing open it to /dev/null */ static void sanitize_stdfds(void) { int fd = open("/dev/null", O_RDWR, 0); while (fd != -1 && fd < 2) fd = dup(fd); if (fd == -1) die("open /dev/null or dup failed: %s", strerror(errno)); if (fd > 2) close(fd); } static void daemonize(void) { switch (fork()) { case 0: break; case -1: die("fork failed: %s", strerror(errno)); default: exit(0); } if (setsid() == -1) die("setsid failed: %s", strerror(errno)); close(0); close(1); close(2); sanitize_stdfds(); } static void store_pid(const char *path) { FILE *f = fopen(path, "w"); if (!f) die("cannot open pid file %s: %s", path, strerror(errno)); if (fprintf(f, "%d\n", getpid()) < 0 || fclose(f) != 0) die("failed to write pid file %s: %s", path, strerror(errno)); } static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) { int socknum, *socklist; socknum = socksetup(listen_addr, listen_port, &socklist); if (socknum == 0) die("unable to allocate any listen sockets on host %s port %u", listen_addr, listen_port); if (pass && gid && (initgroups(pass->pw_name, gid) || setgid (gid) || setuid(pass->pw_uid))) die("cannot drop privileges"); return service_loop(socknum, socklist); } int main(int argc, char **argv) { int listen_port = 0; char *listen_addr = NULL; int inetd_mode = 0; const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; int detach = 0; struct passwd *pass = NULL; struct group *group; gid_t gid = 0; int i; /* Without this we cannot rely on waitpid() to tell * what happened to our children. */ signal(SIGCHLD, SIG_DFL); for (i = 1; i < argc; i++) { char *arg = argv[i]; if (!prefixcmp(arg, "--listen=")) { char *p = arg + 9; char *ph = listen_addr = xmalloc(strlen(arg + 9) + 1); while (*p) *ph++ = tolower(*p++); *ph = 0; continue; } if (!prefixcmp(arg, "--port=")) { char *end; unsigned long n; n = strtoul(arg+7, &end, 0); if (arg[7] && !*end) { listen_port = n; continue; } } if (!strcmp(arg, "--inetd")) { inetd_mode = 1; log_syslog = 1; continue; } if (!strcmp(arg, "--verbose")) { verbose = 1; continue; } if (!strcmp(arg, "--syslog")) { log_syslog = 1; continue; } if (!strcmp(arg, "--export-all")) { export_all_trees = 1; continue; } if (!prefixcmp(arg, "--timeout=")) { timeout = atoi(arg+10); continue; } if (!prefixcmp(arg, "--init-timeout=")) { init_timeout = atoi(arg+15); continue; } if (!strcmp(arg, "--strict-paths")) { strict_paths = 1; continue; } if (!prefixcmp(arg, "--base-path=")) { base_path = arg+12; continue; } if (!strcmp(arg, "--base-path-relaxed")) { base_path_relaxed = 1; continue; } if (!prefixcmp(arg, "--interpolated-path=")) { interpolated_path = arg+20; continue; } if (!strcmp(arg, "--reuseaddr")) { reuseaddr = 1; continue; } if (!strcmp(arg, "--user-path")) { user_path = ""; continue; } if (!prefixcmp(arg, "--user-path=")) { user_path = arg + 12; continue; } if (!prefixcmp(arg, "--pid-file=")) { pid_file = arg + 11; continue; } if (!strcmp(arg, "--detach")) { detach = 1; log_syslog = 1; continue; } if (!prefixcmp(arg, "--user=")) { user_name = arg + 7; continue; } if (!prefixcmp(arg, "--group=")) { group_name = arg + 8; continue; } if (!prefixcmp(arg, "--enable=")) { enable_service(arg + 9, 1); continue; } if (!prefixcmp(arg, "--disable=")) { enable_service(arg + 10, 0); continue; } if (!prefixcmp(arg, "--allow-override=")) { make_service_overridable(arg + 17, 1); continue; } if (!prefixcmp(arg, "--forbid-override=")) { make_service_overridable(arg + 18, 0); continue; } if (!strcmp(arg, "--")) { ok_paths = &argv[i+1]; break; } else if (arg[0] != '-') { ok_paths = &argv[i]; break; } usage(daemon_usage); } if (inetd_mode && (group_name || user_name)) die("--user and --group are incompatible with --inetd"); if (inetd_mode && (listen_port || listen_addr)) die("--listen= and --port= are incompatible with --inetd"); else if (listen_port == 0) listen_port = DEFAULT_GIT_PORT; if (group_name && !user_name) die("--group supplied without --user"); if (user_name) { pass = getpwnam(user_name); if (!pass) die("user not found - %s", user_name); if (!group_name) gid = pass->pw_gid; else { group = getgrnam(group_name); if (!group) die("group not found - %s", group_name); gid = group->gr_gid; } } if (log_syslog) { openlog("git-daemon", 0, LOG_DAEMON); set_die_routine(daemon_die); } if (strict_paths && (!ok_paths || !*ok_paths)) die("option --strict-paths requires a whitelist"); if (inetd_mode) { struct sockaddr_storage ss; struct sockaddr *peer = (struct sockaddr *)&ss; socklen_t slen = sizeof(ss); freopen("/dev/null", "w", stderr); if (getpeername(0, peer, &slen)) peer = NULL; return execute(peer); } if (detach) daemonize(); else sanitize_stdfds(); if (pid_file) store_pid(pid_file); return serve(listen_addr, listen_port, pass, gid); }