X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fservice.c;h=b8687b7cf558b46dff07bf4b1c790d2b6b4ebffb;hp=6e35a4da58e9df2b3b1e83324424615bdaee8e85;hb=f9704703f35a281d9f8fa12018bd396b2be30d36;hpb=8c47c7325fa1ab72febf807f8831ff24c75fbf45 diff --git a/src/service.c b/src/service.c index 6e35a4da5..b8687b7cf 100644 --- a/src/service.c +++ b/src/service.c @@ -32,6 +32,7 @@ #include "strv.h" #include "unit-name.h" #include "dbus-service.h" +#include "special.h" #define COMMENTS "#;\n" #define NEWLINES "\n\r" @@ -49,13 +50,13 @@ static const struct { const RunlevelType type; } rcnd_table[] = { /* Standard SysV runlevels */ - { "rc0.d", SPECIAL_RUNLEVEL0_TARGET, RUNLEVEL_DOWN }, - { "rc1.d", SPECIAL_RUNLEVEL1_TARGET, RUNLEVEL_UP }, + { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN }, + { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP }, { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP }, { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP }, { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP }, { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP }, - { "rc6.d", SPECIAL_RUNLEVEL6_TARGET, RUNLEVEL_DOWN }, + { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }, /* SUSE style boot.d */ { "boot.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT }, @@ -82,7 +83,7 @@ static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { [SERVICE_STOP_POST] = UNIT_DEACTIVATING, [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, - [SERVICE_MAINTAINANCE] = UNIT_INACTIVE, + [SERVICE_MAINTENANCE] = UNIT_INACTIVE, [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING, }; @@ -125,6 +126,27 @@ static void service_unwatch_main_pid(Service *s) { s->main_pid = 0; } +static int service_set_main_pid(Service *s, pid_t pid) { + pid_t ppid; + + assert(s); + + if (pid <= 1) + return -EINVAL; + + if (pid == getpid()) + return -EINVAL; + + if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) + log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.", + s->meta.id, (unsigned long) pid); + + s->main_pid = pid; + s->main_pid_known = true; + + return 0; +} + static void service_close_socket_fd(Service *s) { assert(s); @@ -828,6 +850,9 @@ static int service_load(Unit *u) { if ((r = unit_watch_bus_name(u, s->bus_name)) < 0) return r; } + + if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE) + s->notify_access = NOTIFY_MAIN; } return service_verify(s); @@ -851,13 +876,15 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) { "%sRootDirectoryStartOnly: %s\n" "%sValidNoProcess: %s\n" "%sKillMode: %s\n" - "%sType: %s\n", + "%sType: %s\n" + "%sNotifyAccess: %s\n", prefix, service_state_to_string(s->state), prefix, yes_no(s->permissions_start_only), prefix, yes_no(s->root_directory_start_only), prefix, yes_no(s->valid_no_process), prefix, kill_mode_to_string(s->kill_mode), - prefix, service_type_to_string(s->type)); + prefix, service_type_to_string(s->type), + prefix, notify_access_to_string(s->notify_access)); if (s->control_pid > 0) fprintf(f, @@ -919,8 +946,8 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) { static int service_load_pid_file(Service *s) { char *k; - unsigned long p; int r; + pid_t pid; assert(s); @@ -935,29 +962,24 @@ static int service_load_pid_file(Service *s) { if ((r = read_one_line_file(s->pid_file, &k)) < 0) return r; - if ((r = safe_atolu(k, &p)) < 0) { - free(k); - return r; - } + r = parse_pid(k, &pid); + free(k); - if ((unsigned long) (pid_t) p != p) - return -ERANGE; - - if (p <= 1) - return -ERANGE; + if (r < 0) + return r; - if (kill((pid_t) p, 0) < 0 && errno != EPERM) { - log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.", - (unsigned long long) p, s->pid_file); + if (kill(pid, 0) < 0 && errno != EPERM) { + log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.", + (unsigned long) pid, s->pid_file); return -ESRCH; } - if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0) - /* FIXME: we need to do something here */ + if ((r = service_set_main_pid(s, pid)) < 0) return r; - s->main_pid = (pid_t) p; - s->main_pid_known = true; + if ((r = unit_watch_pid(UNIT(s), pid)) < 0) + /* FIXME: we need to do something here */ + return r; return 0; } @@ -1079,7 +1101,7 @@ static void service_set_state(Service *s, ServiceState state) { state == SERVICE_STOP_POST || state == SERVICE_FINAL_SIGTERM || state == SERVICE_FINAL_SIGKILL || - state == SERVICE_MAINTAINANCE || + state == SERVICE_MAINTENANCE || state == SERVICE_AUTO_RESTART) service_notify_sockets_dead(s); @@ -1228,13 +1250,14 @@ static int service_spawn( bool pass_fds, bool apply_permissions, bool apply_chroot, + bool set_notify_socket, pid_t *_pid) { pid_t pid; int r; int *fds = NULL; unsigned n_fds = 0; - char **argv; + char **argv = NULL, **env = NULL; assert(s); assert(c); @@ -1259,11 +1282,29 @@ static int service_spawn( goto fail; } + if (set_notify_socket) { + char *t; + + if (asprintf(&t, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) { + r = -ENOMEM; + goto fail; + } + + env = strv_env_set(s->meta.manager->environment, t); + free(t); + + if (!env) { + r = -ENOMEM; + goto fail; + } + } else + env = s->meta.manager->environment; + r = exec_spawn(c, argv, &s->exec_context, fds, n_fds, - s->meta.manager->environment, + env, apply_permissions, apply_chroot, UNIT(s)->meta.manager->confirm_spawn, @@ -1271,6 +1312,12 @@ static int service_spawn( &pid); strv_free(argv); + argv = NULL; + + if (set_notify_socket) + strv_free(env); + env = NULL; + if (r < 0) goto fail; @@ -1292,6 +1339,11 @@ static int service_spawn( fail: free(fds); + strv_free(argv); + + if (set_notify_socket) + strv_free(env); + if (timeout) unit_unwatch_timer(UNIT(s), &s->timer_watch); @@ -1324,9 +1376,6 @@ static int cgroup_good(Service *s) { assert(s); - if (s->valid_no_process) - return -EAGAIN; - if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0) return r; @@ -1350,7 +1399,7 @@ static void service_enter_dead(Service *s, bool success, bool allow_restart) { service_set_state(s, SERVICE_AUTO_RESTART); } else - service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); + service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD); return; @@ -1378,6 +1427,7 @@ static void service_enter_stop_post(Service *s, bool success) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; @@ -1460,6 +1510,7 @@ fail: static void service_enter_stop(Service *s, bool success) { int r; + assert(s); if (!success) @@ -1475,6 +1526,7 @@ static void service_enter_stop(Service *s, bool success) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; @@ -1519,10 +1571,10 @@ static void service_enter_start_post(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; - service_set_state(s, SERVICE_START_POST); } else service_enter_running(s, true); @@ -1554,6 +1606,7 @@ static void service_enter_start(Service *s) { true, true, true, + s->notify_access != NOTIFY_NONE, &pid)) < 0) goto fail; @@ -1561,9 +1614,7 @@ static void service_enter_start(Service *s) { /* For simple services we immediately start * the START_POST binaries. */ - s->main_pid = pid; - s->main_pid_known = true; - + service_set_main_pid(s, pid); service_enter_start_post(s); } else if (s->type == SERVICE_FORKING) { @@ -1571,10 +1622,10 @@ static void service_enter_start(Service *s) { /* For forking services we wait until the start * process exited. */ - s->control_pid = pid; - s->control_command_id = SERVICE_EXEC_START; s->control_command = s->exec_command[SERVICE_EXEC_START]; + + s->control_pid = pid; service_set_state(s, SERVICE_START); } else if (s->type == SERVICE_FINISH || @@ -1588,9 +1639,7 @@ static void service_enter_start(Service *s) { * but wait for the bus name to appear on the * bus. Notify services are similar. */ - s->main_pid = pid; - s->main_pid_known = true; - + service_set_main_pid(s, pid); service_set_state(s, SERVICE_START); } else assert_not_reached("Unknown service type"); @@ -1617,6 +1666,7 @@ static void service_enter_start_pre(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; @@ -1664,6 +1714,7 @@ static void service_enter_reload(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; @@ -1698,6 +1749,7 @@ static void service_run_next(Service *s, bool success) { false, !s->permissions_start_only, !s->root_directory_start_only, + false, &s->control_pid)) < 0) goto fail; @@ -1737,7 +1789,7 @@ static int service_start(Unit *u) { s->state == SERVICE_START_POST) return 0; - assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); + assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART); /* Make sure we don't enter a busy loop of some kind. */ if (!ratelimit_test(&s->ratelimit)) { @@ -1819,10 +1871,10 @@ static int service_serialize(Unit *u, FILE *f, FDSet *fds) { unit_serialize_item(u, f, "failure", yes_no(s->failure)); if (s->control_pid > 0) - unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid)); + unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); - if (s->main_pid > 0) - unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid)); + if (s->main_pid_known && s->main_pid > 0) + unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid); unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known)); @@ -1868,19 +1920,19 @@ static int service_deserialize_item(Unit *u, const char *key, const char *value, else s->failure = b || s->failure; } else if (streq(key, "control-pid")) { - unsigned pid; + pid_t pid; - if ((r = safe_atou(value, &pid)) < 0 || pid <= 0) + if ((r = parse_pid(value, &pid)) < 0) log_debug("Failed to parse control-pid value %s", value); else - s->control_pid = (pid_t) pid; + s->control_pid = pid; } else if (streq(key, "main-pid")) { - unsigned pid; + pid_t pid; - if ((r = safe_atou(value, &pid)) < 0 || pid <= 0) + if ((r = parse_pid(value, &pid)) < 0) log_debug("Failed to parse main-pid value %s", value); else - s->main_pid = (pid_t) pid; + service_set_main_pid(s, (pid_t) pid); } else if (streq(key, "main-pid-known")) { int b; @@ -2167,7 +2219,7 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { break; case SERVICE_FINAL_SIGKILL: - log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id); + log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id); service_enter_dead(s, false, true); break; @@ -2205,12 +2257,24 @@ static void service_cgroup_notify_event(Unit *u) { } } -static void service_notify_message(Unit *u, char **tags) { +static void service_notify_message(Unit *u, pid_t pid, char **tags) { Service *s = SERVICE(u); const char *e; assert(u); + if (s->notify_access == NOTIFY_NONE) { + log_warning("%s: Got notification message from PID %lu, but reception is disabled.", + u->meta.id, (unsigned long) pid); + return; + } + + if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) { + log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu", + u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid); + return; + } + log_debug("%s: Got message", u->meta.id); /* Interpret MAINPID= */ @@ -2219,15 +2283,12 @@ static void service_notify_message(Unit *u, char **tags) { s->state == SERVICE_START_POST || s->state == SERVICE_RUNNING || s->state == SERVICE_RELOAD)) { - unsigned long pid; - if (safe_atolu(e + 8, &pid) < 0 || - (unsigned long) (pid_t) pid != pid || - pid <= 1) + if (parse_pid(e + 8, &pid) < 0) log_warning("Failed to parse %s", e); else { log_debug("%s: got %s", u->meta.id, e); - s->main_pid = (pid_t) pid; + service_set_main_pid(s, pid); } } @@ -2460,7 +2521,7 @@ static void service_bus_query_pid_done( s->state == SERVICE_START_POST || s->state == SERVICE_RUNNING || s->state == SERVICE_RELOAD)) - s->main_pid = pid; + service_set_main_pid(s, pid); } int service_set_socket_fd(Service *s, int fd) { @@ -2499,7 +2560,7 @@ static const char* const service_state_table[_SERVICE_STATE_MAX] = { [SERVICE_STOP_POST] = "stop-post", [SERVICE_FINAL_SIGTERM] = "final-sigterm", [SERVICE_FINAL_SIGKILL] = "final-sigkill", - [SERVICE_MAINTAINANCE] = "maintainance", + [SERVICE_MAINTENANCE] = "maintenance", [SERVICE_AUTO_RESTART] = "auto-restart", }; @@ -2534,6 +2595,14 @@ static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); +static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = { + [NOTIFY_NONE] = "none", + [NOTIFY_MAIN] = "main", + [NOTIFY_ALL] = "all" +}; + +DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess); + const UnitVTable service_vtable = { .suffix = ".service",