X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=service%2Finstance.c;h=3b4e93a98ce17331d63df108a1948830f9340100;hb=58c12f74d82c68051471f9c98c86786018f17dae;hp=4d340fd2da37b29dcfe23f9a21d0111cb22ea8e3;hpb=961dc692aff7457f874bce61f8e766514edcf794;p=oweals%2Fprocd.git diff --git a/service/instance.c b/service/instance.c index 4d340fd..3b4e93a 100644 --- a/service/instance.c +++ b/service/instance.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -25,6 +26,8 @@ #include #include #include +#define SYSLOG_NAMES +#include #include @@ -47,6 +50,7 @@ enum { INSTANCE_ATTR_WATCH, INSTANCE_ATTR_ERROR, INSTANCE_ATTR_USER, + INSTANCE_ATTR_GROUP, INSTANCE_ATTR_STDOUT, INSTANCE_ATTR_STDERR, INSTANCE_ATTR_NO_NEW_PRIVS, @@ -56,6 +60,7 @@ enum { INSTANCE_ATTR_PIDFILE, INSTANCE_ATTR_RELOADSIG, INSTANCE_ATTR_TERMTIMEOUT, + INSTANCE_ATTR_FACILITY, __INSTANCE_ATTR_MAX }; @@ -72,6 +77,7 @@ static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = { [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY }, [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY }, [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING }, + [INSTANCE_ATTR_GROUP] = { "group", BLOBMSG_TYPE_STRING }, [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL }, [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL }, [INSTANCE_ATTR_NO_NEW_PRIVS] = { "no_new_privs", BLOBMSG_TYPE_BOOL }, @@ -81,6 +87,7 @@ static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = { [INSTANCE_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING }, [INSTANCE_ATTR_RELOADSIG] = { "reload_signal", BLOBMSG_TYPE_INT32 }, [INSTANCE_ATTR_TERMTIMEOUT] = { "term_timeout", BLOBMSG_TYPE_INT32 }, + [INSTANCE_ATTR_FACILITY] = { "facility", BLOBMSG_TYPE_STRING }, }; enum { @@ -92,6 +99,7 @@ enum { JAIL_ATTR_LOG, JAIL_ATTR_RONLY, JAIL_ATTR_MOUNT, + JAIL_ATTR_NETNS, __JAIL_ATTR_MAX, }; @@ -104,6 +112,7 @@ static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = { [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL }, [JAIL_ATTR_RONLY] = { "ronly", BLOBMSG_TYPE_BOOL }, [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE }, + [JAIL_ATTR_NETNS] = { "netns", BLOBMSG_TYPE_BOOL }, }; struct instance_netdev { @@ -141,14 +150,24 @@ static const struct rlimit_name rlimit_names[] = { { NULL, 0 } }; -static char trace[] = "/sbin/utrace"; - static void closefd(int fd) { if (fd > STDERR_FILENO) close(fd); } +/* convert a string into numeric syslog facility or return -1 if no match found */ +static int +syslog_facility_str_to_int(const char *facility) +{ + CODE *p = facilitynames; + + while (p->c_name && strcasecmp(p->c_name, facility)) + p++; + + return p->c_val; +} + static void instance_limits(const char *limit, const char *value) { @@ -205,6 +224,16 @@ jail_run(struct service_instance *in, char **argv) argv[argc++] = in->seccomp; } + if (in->user) { + argv[argc++] = "-U"; + argv[argc++] = in->user; + } + + if (in->group) { + argv[argc++] = "-G"; + argv[argc++] = in->group; + } + if (in->no_new_privs) argv[argc++] = "-c"; @@ -223,6 +252,9 @@ jail_run(struct service_instance *in, char **argv) if (jail->ronly) argv[argc++] = "-o"; + if (jail->netns) + argv[argc++] = "-N"; + blobmsg_list_for_each(&jail->mount, var) { const char *type = blobmsg_data(var->data); @@ -243,8 +275,7 @@ instance_removepid(struct service_instance *in) { if (!in->pidfile) return 0; if (unlink(in->pidfile)) { - ERROR("Failed to removed pidfile: %s: %d - %s\n", - in->pidfile, errno, strerror(errno)); + ERROR("Failed to remove pidfile: %s: %m\n", in->pidfile); return 1; } return 0; @@ -260,19 +291,16 @@ instance_writepid(struct service_instance *in) } _pidfile = fopen(in->pidfile, "w"); if (_pidfile == NULL) { - ERROR("failed to open pidfile for writing: %s: %d (%s)", - in->pidfile, errno, strerror(errno)); + ERROR("failed to open pidfile for writing: %s: %m", in->pidfile); return 1; } if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) { - ERROR("failed to write pidfile: %s: %d (%s)", - in->pidfile, errno, strerror(errno)); + ERROR("failed to write pidfile: %s: %m", in->pidfile); fclose(_pidfile); return 2; } if (fclose(_pidfile)) { - ERROR("failed to close pidfile: %s: %d (%s)", - in->pidfile, errno, strerror(errno)); + ERROR("failed to close pidfile: %s: %m", in->pidfile); return 3; } @@ -285,7 +313,6 @@ instance_run(struct service_instance *in, int _stdout, int _stderr) struct blobmsg_list_node *var; struct blob_attr *cur; char **argv; - char *ld_preload; int argc = 1; /* NULL terminated */ int rem, _stdin; bool seccomp = !in->trace && !in->has_jail && in->seccomp; @@ -303,26 +330,34 @@ instance_run(struct service_instance *in, int _stdout, int _stderr) if (seccomp) setenv("SECCOMP_FILE", in->seccomp, 1); - if ((seccomp || setlbf) && asprintf(&ld_preload, "LD_PRELOAD=%s%s%s", - seccomp ? "/lib/libpreload-seccomp.so" : "", - seccomp && setlbf ? ":" : "", - setlbf ? "/lib/libsetlbf.so" : "") > 0) - putenv(ld_preload); + if (setlbf) + setenv("LD_PRELOAD", "/lib/libsetlbf.so", 1); blobmsg_list_for_each(&in->limits, var) instance_limits(blobmsg_name(var->data), blobmsg_data(var->data)); - if (in->trace) + if (in->trace || seccomp) argc += 1; argv = alloca(sizeof(char *) * (argc + in->jail.argc)); argc = 0; +#ifdef SECCOMP_SUPPORT if (in->trace) - argv[argc++] = trace; + argv[argc++] = "/sbin/utrace"; + else if (seccomp) + argv[argc++] = "/sbin/seccomp-trace"; +#else + if (in->trace || seccomp) + ULOG_WARN("Seccomp support for %s::%s not available\n", in->srv->name, in->name); +#endif - if (in->has_jail) + if (in->has_jail) { argc = jail_run(in, argv); + if (argc != in->jail.argc) + ULOG_WARN("expected %i jail params, used %i for %s::%s\n", + in->jail.argc, argc, in->srv->name, in->name); + } blobmsg_for_each_attr(cur, in->command, rem) argv[argc++] = blobmsg_data(cur); @@ -350,12 +385,16 @@ instance_run(struct service_instance *in, int _stdout, int _stderr) closefd(_stderr); } - if (in->gid && setgid(in->gid)) { - ERROR("failed to set group id %d: %d (%s)\n", in->gid, errno, strerror(errno)); + if (!in->has_jail && in->user && in->pw_gid && initgroups(in->user, in->pw_gid)) { + ERROR("failed to initgroups() for user %s: %m\n", in->user); + exit(127); + } + if (!in->has_jail && in->gr_gid && setgid(in->gr_gid)) { + ERROR("failed to set group id %d: %m\n", in->gr_gid); exit(127); } - if (in->uid && setuid(in->uid)) { - ERROR("failed to set user id %d: %d (%s)\n", in->uid, errno, strerror(errno)); + if (!in->has_jail && in->uid && setuid(in->uid)) { + ERROR("failed to set user id %d: %m\n", in->uid); exit(127); } @@ -405,14 +444,14 @@ instance_start(struct service_instance *in) instance_free_stdio(in); if (in->_stdout.fd.fd > -2) { if (pipe(opipe)) { - ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno)); + ULOG_WARN("pipe() failed: %m\n"); opipe[0] = opipe[1] = -1; } } if (in->_stderr.fd.fd > -2) { if (pipe(epipe)) { - ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno)); + ULOG_WARN("pipe() failed: %m\n"); epipe[0] = epipe[1] = -1; } } @@ -444,11 +483,13 @@ instance_start(struct service_instance *in) if (opipe[0] > -1) { ustream_fd_init(&in->_stdout, opipe[0]); closefd(opipe[1]); + fcntl(opipe[0], F_SETFD, FD_CLOEXEC); } if (epipe[0] > -1) { ustream_fd_init(&in->_stderr, epipe[0]); closefd(epipe[1]); + fcntl(epipe[0], F_SETFD, FD_CLOEXEC); } service_event("instance.start", in->srv->name, in->name); @@ -462,21 +503,23 @@ instance_stdio(struct ustream *s, int prio, struct service_instance *in) arg0 = basename(blobmsg_data(blobmsg_data(in->command))); snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid); - ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident); + ulog_open(ULOG_SYSLOG, in->syslog_facility, ident); do { - str = ustream_get_read_buf(s, NULL); + str = ustream_get_read_buf(s, &len); if (!str) break; - newline = strchr(str, '\n'); - if (!newline) + newline = memchr(str, '\n', len); + if (!newline && (s->r.buffer_len != len)) break; - *newline = 0; + if (newline) { + *newline = 0; + len = newline + 1 - str; + } ulog(prio, "%s\n", str); - len = newline + 1 - str; ustream_consume(s, len); } while (1); @@ -512,6 +555,16 @@ instance_timeout(struct uloop_timeout *t) instance_start(in); } +static void +instance_delete(struct service_instance *in) +{ + struct service *s = in->srv; + + avl_delete(&s->instances.avl, &in->node.avl); + instance_free(in); + service_stopped(s); +} + static void instance_exit(struct uloop_process *p, int ret) { @@ -525,8 +578,6 @@ instance_exit(struct uloop_process *p, int ret) runtime = tp.tv_sec - in->start.tv_sec; DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime); - if (upgrade_running) - return; uloop_timeout_cancel(&in->timeout); service_event("instance.stop", in->srv->name, in->name); @@ -535,13 +586,8 @@ instance_exit(struct uloop_process *p, int ret) instance_removepid(in); if (in->restart) instance_start(in); - else { - struct service *s = in->srv; - - avl_delete(&s->instances.avl, &in->node.avl); - instance_free(in); - service_stopped(s); - } + else + instance_delete(in); } else if (in->restart) { instance_start(in); } else if (in->respawn) { @@ -563,11 +609,14 @@ instance_exit(struct uloop_process *p, int ret) } void -instance_stop(struct service_instance *in) +instance_stop(struct service_instance *in, bool halt) { - if (!in->proc.pending) + if (!in->proc.pending) { + if (halt) + instance_delete(in); return; - in->halt = true; + } + in->halt = halt; in->restart = in->respawn = false; kill(in->proc.pid, SIGTERM); uloop_timeout_set(&in->timeout, in->term_timeout * 1000); @@ -590,6 +639,11 @@ instance_restart(struct service_instance *in) uloop_timeout_set(&in->timeout, in->term_timeout * 1000); } +static bool string_changed(const char *a, const char *b) +{ + return !((!a && !b) || (a && b && !strcmp(a, b))); +} + static bool instance_config_changed(struct service_instance *in, struct service_instance *in_new) { @@ -611,20 +665,34 @@ instance_config_changed(struct service_instance *in, struct service_instance *in if (in->nice != in_new->nice) return true; + if (in->syslog_facility != in_new->syslog_facility) + return true; + + if (string_changed(in->user, in_new->user)) + return true; + + if (string_changed(in->group, in_new->group)) + return true; + if (in->uid != in_new->uid) return true; - if (in->gid != in_new->gid) + if (in->pw_gid != in_new->pw_gid) return true; - if (in->pidfile && in_new->pidfile) - if (strcmp(in->pidfile, in_new->pidfile)) - return true; + if (string_changed(in->pidfile, in_new->pidfile)) + return true; - if (in->pidfile && !in_new->pidfile) + if (in->respawn_retry != in_new->respawn_retry) + return true; + if (in->respawn_threshold != in_new->respawn_threshold) + return true; + if (in->respawn_timeout != in_new->respawn_timeout) return true; - if (!in->pidfile && in_new->pidfile) + if ((!in->seccomp && in_new->seccomp) || + (in->seccomp && !in_new->seccomp) || + (in->seccomp && in_new->seccomp && strcmp(in->seccomp, in_new->seccomp))) return true; if (!blobmsg_list_equal(&in->limits, &in_new->limits)) @@ -742,11 +810,11 @@ instance_jail_parse(struct service_instance *in, struct blob_attr *attr) jail->argc = 2; if (tb[JAIL_ATTR_NAME]) { - jail->name = blobmsg_get_string(tb[JAIL_ATTR_NAME]); + jail->name = strdup(blobmsg_get_string(tb[JAIL_ATTR_NAME])); jail->argc += 2; } if (tb[JAIL_ATTR_HOSTNAME]) { - jail->hostname = blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]); + jail->hostname = strdup(blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME])); jail->argc += 2; } if (tb[JAIL_ATTR_PROCFS]) { @@ -769,6 +837,10 @@ instance_jail_parse(struct service_instance *in, struct blob_attr *attr) jail->ronly = blobmsg_get_bool(tb[JAIL_ATTR_RONLY]); jail->argc++; } + if (tb[JAIL_ATTR_NETNS]) { + jail->netns = blobmsg_get_bool(tb[JAIL_ATTR_NETNS]); + jail->argc++; + } if (tb[JAIL_ATTR_MOUNT]) { struct blob_attr *cur; int rem; @@ -780,6 +852,15 @@ instance_jail_parse(struct service_instance *in, struct blob_attr *attr) if (in->seccomp) jail->argc += 2; + if (in->user) + jail->argc += 2; + + if (in->group) + jail->argc += 2; + + if (in->no_new_privs) + jail->argc++; + return 1; } @@ -860,10 +941,21 @@ instance_config_parse(struct service_instance *in) } if (tb[INSTANCE_ATTR_USER]) { - struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER])); + const char *user = blobmsg_get_string(tb[INSTANCE_ATTR_USER]); + struct passwd *p = getpwnam(user); if (p) { + in->user = strdup(user); in->uid = p->pw_uid; - in->gid = p->pw_gid; + in->gr_gid = in->pw_gid = p->pw_gid; + } + } + + if (tb[INSTANCE_ATTR_GROUP]) { + const char *group = blobmsg_get_string(tb[INSTANCE_ATTR_GROUP]); + struct group *p = getgrnam(group); + if (p) { + in->group = strdup(group); + in->gr_gid = p->gr_gid; } } @@ -873,20 +965,13 @@ instance_config_parse(struct service_instance *in) if (tb[INSTANCE_ATTR_NO_NEW_PRIVS]) in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]); - if (!in->trace && tb[INSTANCE_ATTR_SECCOMP]) { - char *seccomp = blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]); - struct stat s; - - if (stat(seccomp, &s)) - ERROR("%s: not starting seccomp as %s is missing\n", in->name, seccomp); - else - in->seccomp = seccomp; - } + if (!in->trace && tb[INSTANCE_ATTR_SECCOMP]) + in->seccomp = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP])); if (tb[INSTANCE_ATTR_PIDFILE]) { char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]); if (pidfile) - in->pidfile = pidfile; + in->pidfile = strdup(pidfile); } if (tb[INSTANCE_ATTR_RELOADSIG]) @@ -918,6 +1003,15 @@ instance_config_parse(struct service_instance *in) if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true)) return false; + if (tb[INSTANCE_ATTR_FACILITY]) { + int facility = syslog_facility_str_to_int(blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY])); + if (facility != -1) { + in->syslog_facility = facility; + DEBUG(3, "setting facility '%s'\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY])); + } else + DEBUG(3, "unknown syslog facility '%s' given, using default (LOG_DAEMON)\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY])); + } + return true; } @@ -933,6 +1027,20 @@ instance_config_cleanup(struct service_instance *in) blobmsg_list_free(&in->jail.mount); } +static void +instance_config_move_strdup(char **dst, char *src) +{ + if (*dst) { + free(*dst); + *dst = NULL; + } + + if (!src) + return; + + *dst = strdup(src); +} + static void instance_config_move(struct service_instance *in, struct service_instance *in_src) { @@ -946,9 +1054,19 @@ instance_config_move(struct service_instance *in, struct service_instance *in_sr blobmsg_list_move(&in->jail.mount, &in_src->jail.mount); in->trigger = in_src->trigger; in->command = in_src->command; - in->pidfile = in_src->pidfile; + in->respawn = in_src->respawn; + in->respawn_retry = in_src->respawn_retry; + in->respawn_threshold = in_src->respawn_threshold; + in->respawn_timeout = in_src->respawn_timeout; in->name = in_src->name; + in->trace = in_src->trace; in->node.avl.key = in_src->node.avl.key; + in->syslog_facility = in_src->syslog_facility; + + instance_config_move_strdup(&in->pidfile, in_src->pidfile); + instance_config_move_strdup(&in->seccomp, in_src->seccomp); + instance_config_move_strdup(&in->jail.name, in_src->jail.name); + instance_config_move_strdup(&in->jail.hostname, in_src->jail.hostname); free(in->config); in->config = in_src->config; @@ -983,6 +1101,12 @@ instance_free(struct service_instance *in) watch_del(in); instance_config_cleanup(in); free(in->config); + free(in->user); + free(in->group); + free(in->jail.name); + free(in->jail.hostname); + free(in->seccomp); + free(in->pidfile); free(in); } @@ -996,6 +1120,7 @@ instance_init(struct service_instance *in, struct service *s, struct blob_attr * in->timeout.cb = instance_timeout; in->proc.cb = instance_exit; in->term_timeout = 5; + in->syslog_facility = LOG_DAEMON; in->_stdout.fd.fd = -2; in->_stdout.stream.string_data = true; @@ -1085,6 +1210,12 @@ void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose) if (in->pidfile) blobmsg_add_string(b, "pidfile", in->pidfile); + if (in->user) + blobmsg_add_string(b, "user", in->user); + + if (in->group) + blobmsg_add_string(b, "group", in->group); + if (in->has_jail) { void *r = blobmsg_open_table(b, "jail"); if (in->jail.name) @@ -1096,6 +1227,7 @@ void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose) blobmsg_add_u8(b, "ubus", in->jail.ubus); blobmsg_add_u8(b, "log", in->jail.log); blobmsg_add_u8(b, "ronly", in->jail.ronly); + blobmsg_add_u8(b, "netns", in->jail.netns); blobmsg_close_table(b, r); if (!avl_is_empty(&in->jail.mount.avl)) { struct blobmsg_list_node *var;