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Diffstat (limited to 'src/systemctl/systemctl-compat-halt.c')
| -rw-r--r-- | src/systemctl/systemctl-compat-halt.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-compat-halt.c b/src/systemctl/systemctl-compat-halt.c new file mode 100644 index 0000000..4f6e304 --- /dev/null +++ b/src/systemctl/systemctl-compat-halt.c @@ -0,0 +1,203 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <getopt.h> +#include <unistd.h> + +#include "sd-daemon.h" + +#include "alloc-util.h" +#include "pretty-print.h" +#include "process-util.h" +#include "reboot-util.h" +#include "systemctl-compat-halt.h" +#include "systemctl-compat-telinit.h" +#include "systemctl-logind.h" +#include "systemctl-start-unit.h" +#include "systemctl-util.h" +#include "systemctl.h" +#include "terminal-util.h" +#include "utmp-wtmp.h" + +static int halt_help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("halt", "8", &link); + if (r < 0) + return log_oom(); + + /* Note: if you are tempted to add new command line switches here, please do not. Let this + * compatibility command rest in peace. Its interface is not even owned by us as much as it is by + * sysvinit. If you add something new, add it to "systemctl halt", "systemctl reboot", "systemctl + * poweroff" instead. */ + + printf("%s [OPTIONS...]%s\n" + "\n%s%s the system.%s\n" + "\nOptions:\n" + " --help Show this help\n" + " --halt Halt the machine\n" + " -p --poweroff Switch off the machine\n" + " --reboot Reboot the machine\n" + " -f --force Force immediate halt/power-off/reboot\n" + " -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n" + " -d --no-wtmp Don't write wtmp record\n" + " --no-wall Don't send wall message before halt/power-off/reboot\n" + "\n%sThis is a compatibility interface, please use the more powerful 'systemctl %s' command instead.%s\n" + "\nSee the %s for details.\n", + program_invocation_short_name, + arg_action == ACTION_REBOOT ? " [ARG]" : "", + ansi_highlight(), arg_action == ACTION_REBOOT ? "Reboot" : + arg_action == ACTION_POWEROFF ? "Power off" : + "Halt", ansi_normal(), + ansi_highlight_red(), arg_action == ACTION_REBOOT ? "reboot" : + arg_action == ACTION_POWEROFF ? "poweroff" : + "halt", ansi_normal(), + link); + + return 0; +} + +int halt_parse_argv(int argc, char *argv[]) { + enum { + ARG_HELP = 0x100, + ARG_HALT, + ARG_REBOOT, + ARG_NO_WALL + }; + + static const struct option options[] = { + { "help", no_argument, NULL, ARG_HELP }, + { "halt", no_argument, NULL, ARG_HALT }, + { "poweroff", no_argument, NULL, 'p' }, + { "reboot", no_argument, NULL, ARG_REBOOT }, + { "force", no_argument, NULL, 'f' }, + { "wtmp-only", no_argument, NULL, 'w' }, + { "no-wtmp", no_argument, NULL, 'd' }, + { "no-sync", no_argument, NULL, 'n' }, + { "no-wall", no_argument, NULL, ARG_NO_WALL }, + {} + }; + + int c, r, runlevel; + + assert(argc >= 0); + assert(argv); + + /* called in sysvinit system as last command in shutdown/reboot so this is always forceful */ + if (utmp_get_runlevel(&runlevel, NULL) >= 0) + if (IN_SET(runlevel, '0', '6')) + arg_force = 2; + + while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) + switch (c) { + + case ARG_HELP: + return halt_help(); + + case ARG_HALT: + arg_action = ACTION_HALT; + break; + + case 'p': + if (arg_action != ACTION_REBOOT) + arg_action = ACTION_POWEROFF; + break; + + case ARG_REBOOT: + arg_action = ACTION_REBOOT; + break; + + case 'f': + arg_force = 2; + break; + + case 'w': + arg_dry_run = true; + break; + + case 'd': + arg_no_wtmp = true; + break; + + case 'n': + arg_no_sync = true; + break; + + case ARG_NO_WALL: + arg_no_wall = true; + break; + + case 'i': + case 'h': + /* Compatibility nops */ + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached(); + } + + if (arg_action == ACTION_REBOOT && (argc == optind || argc == optind + 1)) { + r = update_reboot_parameter_and_warn(argc == optind + 1 ? argv[optind] : NULL, false); + if (r < 0) + return r; + } else if (optind < argc) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Too many arguments."); + + return 1; +} + +int halt_main(void) { + int r; + + if (arg_force == 0) { + /* always try logind first */ + if (arg_when > 0) + r = logind_schedule_shutdown(arg_action); + else { + r = logind_check_inhibitors(arg_action); + if (r < 0) + return r; + + r = logind_reboot(arg_action); + } + if (r >= 0) + return r; + if (IN_SET(r, -EACCES, -EOPNOTSUPP, -EINPROGRESS)) + /* Requested operation requires auth, is not supported on the local system or already in + * progress */ + return r; + /* on all other errors, try low-level operation */ + + /* In order to minimize the difference between operation with and without logind, we explicitly + * enable non-blocking mode for this, as logind's shutdown operations are always non-blocking. */ + arg_no_block = true; + + if (!arg_dry_run) + return start_with_fallback(); + } + + if (geteuid() != 0) { + (void) must_be_root(); + return -EPERM; + } + + if (!arg_no_wtmp) { + if (sd_booted() > 0) + log_debug("Not writing utmp record, assuming that systemd-update-utmp is used."); + else { + r = utmp_put_shutdown(); + if (r < 0) + log_warning_errno(r, "Failed to write utmp record: %m"); + } + } + + if (arg_dry_run) + return 0; + + r = halt_now(arg_action); + return log_error_errno(r, "Failed to %s: %m", action_table[arg_action].verb); +} |