X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Finitctl.c;h=f36f1cc704fd49417004dd5593fcf5271c13149a;hp=83a560a14a538e305d16bb8f45d85cc633fa98f4;hb=46e964c5ce20ce4b46b9187376057081eb71bc55;hpb=dce3acd2e2447a9de642768f86e39d7c9d5bee81 diff --git a/src/initctl.c b/src/initctl.c index 83a560a14..f36f1cc70 100644 --- a/src/initctl.c +++ b/src/initctl.c @@ -1,4 +1,4 @@ -/*-*- Mode: C; c-basic-offset: 8 -*-*/ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. @@ -42,9 +42,10 @@ #include "special.h" #include "sd-daemon.h" #include "dbus-common.h" +#include "def.h" #define SERVER_FD_MAX 16 -#define TIMEOUT ((int) (10*MSEC_PER_SEC)) +#define TIMEOUT_MSEC ((int) (DEFAULT_EXIT_USEC/USEC_PER_MSEC)) typedef struct Fifo Fifo; @@ -68,27 +69,32 @@ struct Fifo { LIST_FIELDS(Fifo, fifo); }; -static const char *translate_runlevel(int runlevel) { +static const char *translate_runlevel(int runlevel, bool *isolate) { static const struct { const int runlevel; const char *special; + bool isolate; } table[] = { - { '0', SPECIAL_POWEROFF_TARGET }, - { '1', SPECIAL_RESCUE_TARGET }, - { 's', SPECIAL_RESCUE_TARGET }, - { 'S', SPECIAL_RESCUE_TARGET }, - { '2', SPECIAL_RUNLEVEL2_TARGET }, - { '3', SPECIAL_RUNLEVEL3_TARGET }, - { '4', SPECIAL_RUNLEVEL4_TARGET }, - { '5', SPECIAL_RUNLEVEL5_TARGET }, - { '6', SPECIAL_REBOOT_TARGET }, + { '0', SPECIAL_POWEROFF_TARGET, false }, + { '1', SPECIAL_RESCUE_TARGET, true }, + { 's', SPECIAL_RESCUE_TARGET, true }, + { 'S', SPECIAL_RESCUE_TARGET, true }, + { '2', SPECIAL_RUNLEVEL2_TARGET, true }, + { '3', SPECIAL_RUNLEVEL3_TARGET, true }, + { '4', SPECIAL_RUNLEVEL4_TARGET, true }, + { '5', SPECIAL_RUNLEVEL5_TARGET, true }, + { '6', SPECIAL_REBOOT_TARGET, false }, }; unsigned i; + assert(isolate); + for (i = 0; i < ELEMENTSOF(table); i++) - if (table[i].runlevel == runlevel) + if (table[i].runlevel == runlevel) { + *isolate = table[i].isolate; return table[i].special; + } return NULL; } @@ -97,18 +103,24 @@ static void change_runlevel(Server *s, int runlevel) { const char *target; DBusMessage *m = NULL, *reply = NULL; DBusError error; - const char *replace = "replace"; + const char *mode; + bool isolate = false; assert(s); dbus_error_init(&error); - if (!(target = translate_runlevel(runlevel))) { + if (!(target = translate_runlevel(runlevel, &isolate))) { log_warning("Got request for unknown runlevel %c, ignoring.", runlevel); goto finish; } - log_debug("Running request %s", target); + if (isolate) + mode = "isolate"; + else + mode = "replace"; + + log_debug("Running request %s/start/%s", target, mode); if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"))) { log_error("Could not allocate message."); @@ -117,14 +129,14 @@ static void change_runlevel(Server *s, int runlevel) { if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &target, - DBUS_TYPE_STRING, &replace, + DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID)) { - log_error("Could not attach target and flag information to signal message."); + log_error("Could not attach target and flag information to message."); goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(s->bus, m, -1, &error))) { - log_error("Failed to start unit: %s", error.message); + log_error("Failed to start unit: %s", bus_error_message(&error)); goto finish; } @@ -153,7 +165,24 @@ static void request_process(Server *s, const struct init_request *req) { if (!isprint(req->runlevel)) log_error("Got invalid runlevel. Ignoring."); else - change_runlevel(s, req->runlevel); + switch (req->runlevel) { + + /* we are async anyway, so just use kill for reexec/reload */ + case 'u': + case 'U': + if (kill(1, SIGTERM) < 0) + log_error("kill() failed: %m"); + break; + + case 'q': + case 'Q': + if (kill(1, SIGHUP) < 0) + log_error("kill() failed: %m"); + break; + + default: + change_runlevel(s, req->runlevel); + } return; case INIT_CMD_POWERFAIL: @@ -232,8 +261,9 @@ static void server_done(Server *s) { close_nointr_nofail(s->epoll_fd); if (s->bus) { - dbus_connection_close(s->bus); - dbus_connection_unref(s->bus); + dbus_connection_flush(s->bus); + dbus_connection_close(s->bus); + dbus_connection_unref(s->bus); } } @@ -298,7 +328,7 @@ static int server_init(Server *s, unsigned n_sockets) { } if (bus_connect(DBUS_BUS_SYSTEM, &s->bus, NULL, &error) < 0) { - log_error("Failed to get D-Bus connection: %s", error.message); + log_error("Failed to get D-Bus connection: %s", bus_error_message(&error)); goto fail; } @@ -335,35 +365,38 @@ static int process_event(Server *s, struct epoll_event *ev) { int main(int argc, char *argv[]) { Server server; - int r = 3, n; + int r = EXIT_FAILURE, n; if (getppid() != 1) { log_error("This program should be invoked by init only."); - return 1; + return EXIT_FAILURE; } if (argc > 1) { log_error("This program does not take arguments."); - return 1; + return EXIT_FAILURE; } log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); log_parse_environment(); + log_open(); - log_info("systemd-initctl running as pid %lu", (unsigned long) getpid()); + umask(0022); if ((n = sd_listen_fds(true)) < 0) { log_error("Failed to read listening file descriptors from environment: %s", strerror(-r)); - return 1; + return EXIT_FAILURE; } if (n <= 0 || n > SERVER_FD_MAX) { log_error("No or too many file descriptors passed."); - return 2; + return EXIT_FAILURE; } if (server_init(&server, (unsigned) n) < 0) - return 2; + return EXIT_FAILURE; + + log_debug("systemd-initctl running as pid %lu", (unsigned long) getpid()); sd_notify(false, "READY=1\n" @@ -375,7 +408,7 @@ int main(int argc, char *argv[]) { if ((k = epoll_wait(server.epoll_fd, &event, 1, - TIMEOUT)) < 0) { + TIMEOUT_MSEC)) < 0) { if (errno == EINTR) continue; @@ -387,10 +420,13 @@ int main(int argc, char *argv[]) { if (k <= 0) break; - if ((k = process_event(&server, &event)) < 0) + if (process_event(&server, &event) < 0) goto fail; } - r = 0; + + r = EXIT_SUCCESS; + + log_debug("systemd-initctl stopped as pid %lu", (unsigned long) getpid()); fail: sd_notify(false, @@ -398,8 +434,6 @@ fail: server_done(&server); - log_info("systemd-initctl stopped as pid %lu", (unsigned long) getpid()); - dbus_shutdown(); return r;