From: Lennart Poettering Date: Thu, 17 Jun 2010 20:55:53 +0000 (+0200) Subject: service: rework PID parsing logic everywhere X-Git-Tag: v1~175 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5925dd3c7ab771c86036b4a91640957e5d7a0e80;p=systemd service: rework PID parsing logic everywhere --- diff --git a/src/mount.c b/src/mount.c index 4a38e957..ea81f5fe 100644 --- a/src/mount.c +++ b/src/mount.c @@ -839,7 +839,7 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { unit_serialize_item(u, f, "failure", yes_no(m->failure)); if (m->control_pid > 0) - unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid); + unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid); if (m->control_command_id >= 0) unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); @@ -872,12 +872,12 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F m->failure = b || m->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 - m->control_pid = (pid_t) pid; + m->control_pid = pid; } else if (streq(key, "control-command")) { MountExecCommand id; diff --git a/src/service.c b/src/service.c index a38c8807..fe91b924 100644 --- a/src/service.c +++ b/src/service.c @@ -125,6 +125,35 @@ static void service_unwatch_main_pid(Service *s) { s->main_pid = 0; } +static int service_set_main_pid(Service *s, pid_t pid) { + assert(s); + + if (pid <= 1) + return -EINVAL; + + if (pid == getpid()) + return -EINVAL; + + s->main_pid = pid; + s->main_pid_known = true; + + return 0; +} + +static int service_set_control_pid(Service *s, pid_t pid) { + assert(s); + + if (pid <= 1) + return -EINVAL; + + if (pid == getpid()) + return -EINVAL; + + s->control_pid = pid; + + return 0; +} + static void service_close_socket_fd(Service *s) { assert(s); @@ -919,8 +948,8 @@ 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 +964,24 @@ 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; - } - - if ((unsigned long) (pid_t) p != p) - return -ERANGE; + r = parse_pid(k, &pid); + free(k); - 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; } @@ -1460,6 +1484,8 @@ fail: static void service_enter_stop(Service *s, bool success) { int r; + pid_t pid; + assert(s); if (!success) @@ -1475,9 +1501,10 @@ static void service_enter_stop(Service *s, bool success) { false, !s->permissions_start_only, !s->root_directory_start_only, - &s->control_pid)) < 0) + &pid)) < 0) goto fail; + service_set_control_pid(s, pid); service_set_state(s, SERVICE_STOP); } else service_enter_signal(s, SERVICE_STOP_SIGTERM, true); @@ -1507,6 +1534,7 @@ static void service_enter_running(Service *s, bool success) { static void service_enter_start_post(Service *s) { int r; + pid_t pid; assert(s); service_unwatch_control_pid(s); @@ -1519,10 +1547,10 @@ static void service_enter_start_post(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, - &s->control_pid)) < 0) + &pid)) < 0) goto fail; - + service_set_control_pid(s, pid); service_set_state(s, SERVICE_START_POST); } else service_enter_running(s, true); @@ -1561,9 +1589,7 @@ 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 +1597,10 @@ 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]; + + service_set_control_pid(s, pid); service_set_state(s, SERVICE_START); } else if (s->type == SERVICE_FINISH || @@ -1588,9 +1614,7 @@ 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"); @@ -1604,6 +1628,7 @@ fail: static void service_enter_start_pre(Service *s) { int r; + pid_t pid; assert(s); @@ -1617,9 +1642,10 @@ static void service_enter_start_pre(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, - &s->control_pid)) < 0) + &pid)) < 0) goto fail; + service_set_control_pid(s, pid); service_set_state(s, SERVICE_START_PRE); } else service_enter_start(s); @@ -1651,6 +1677,7 @@ fail: static void service_enter_reload(Service *s) { int r; + pid_t pid; assert(s); @@ -1664,9 +1691,10 @@ static void service_enter_reload(Service *s) { false, !s->permissions_start_only, !s->root_directory_start_only, - &s->control_pid)) < 0) + &pid)) < 0) goto fail; + service_set_control_pid(s, pid); service_set_state(s, SERVICE_RELOAD); } else service_enter_running(s, true); @@ -1680,6 +1708,7 @@ fail: static void service_run_next(Service *s, bool success) { int r; + pid_t pid; assert(s); assert(s->control_command); @@ -1698,9 +1727,10 @@ static void service_run_next(Service *s, bool success) { false, !s->permissions_start_only, !s->root_directory_start_only, - &s->control_pid)) < 0) + &pid)) < 0) goto fail; + service_set_control_pid(s, pid); return; fail: @@ -1819,10 +1849,10 @@ 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 +1898,19 @@ 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; + service_set_control_pid(s, 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; @@ -2219,15 +2249,13 @@ 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; + pid_t 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 +2488,7 @@ 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) { diff --git a/src/socket.c b/src/socket.c index 1852fe93..874cc916 100644 --- a/src/socket.c +++ b/src/socket.c @@ -1047,7 +1047,7 @@ static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted); 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->control_command_id >= 0) unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id)); @@ -1110,12 +1110,12 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, else s->n_accepted += k; } 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, "control-command")) { SocketExecCommand id;