chiark / gitweb /
systemd: unset HOME and TERM set from the kernel
[elogind.git] / src / main.c
index dc561a9b80356bb0d03d7e3a49590956e541814c..9a51a9187ffe03a2c1b5c01d6b96a6a671180273 100644 (file)
@@ -38,6 +38,7 @@
 #include "hostname-setup.h"
 #include "loopback-setup.h"
 #include "kmod-setup.h"
+#include "locale-setup.h"
 #include "load-fragment.h"
 #include "fdset.h"
 #include "special.h"
@@ -63,18 +64,15 @@ static bool arg_crash_shell = false;
 static int arg_crash_chvt = -1;
 static bool arg_confirm_spawn = false;
 static bool arg_show_status = true;
+#ifdef HAVE_SYSV_COMPAT
 static bool arg_sysv_console = true;
+#endif
 static bool arg_mount_auto = true;
 static bool arg_swap_auto = true;
 static char *arg_console = NULL;
 
 static FILE* serialization = NULL;
 
-_noreturn_ static void freeze(void) {
-        for (;;)
-                pause();
-}
-
 static void nop_handler(int sig) {
 }
 
@@ -119,12 +117,13 @@ _noreturn_ static void crash(int sig) {
                         _exit(1);
 
                 } else {
-                        int status;
+                        siginfo_t status;
+                        int r;
 
                         /* Order things nicely. */
-                        if (waitpid(pid, &status, 0) < 0)
-                                log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(errno));
-                        else if (!WCOREDUMP(status))
+                        if ((r = wait_for_terminate(pid, &status)) < 0)
+                                log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
+                        else if (status.si_code != CLD_DUMPED)
                                 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
                         else
                                 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
@@ -310,7 +309,7 @@ static int parse_proc_cmdline_word(const char *word) {
                         log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
                 else
                         arg_show_status = r;
-
+#ifdef HAVE_SYSV_COMPAT
         } else if (startswith(word, "systemd.sysv_console=")) {
                 int r;
 
@@ -318,6 +317,7 @@ static int parse_proc_cmdline_word(const char *word) {
                         log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
                 else
                         arg_sysv_console = r;
+#endif
 
         } else if (startswith(word, "systemd.")) {
 
@@ -330,7 +330,9 @@ static int parse_proc_cmdline_word(const char *word) {
                          "systemd.crash_chvt=N                     Change to VT #N on crash\n"
                          "systemd.confirm_spawn=0|1                Confirm every process spawn\n"
                          "systemd.show_status=0|1                  Show status updates on the console during bootup\n"
+#ifdef HAVE_SYSV_COMPAT
                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
+#endif
                          "systemd.log_target=console|kmsg|syslog|syslog-org-kmsg|null\n"
                          "                                         Log target\n"
                          "systemd.log_level=LEVEL                  Log level\n"
@@ -359,7 +361,9 @@ static int parse_proc_cmdline_word(const char *word) {
 
         } else if (streq(word, "quiet")) {
                 arg_show_status = false;
+#ifdef HAVE_SYSV_COMPAT
                 arg_sysv_console = false;
+#endif
         } else {
                 unsigned i;
 
@@ -503,7 +507,9 @@ static int parse_config_file(void) {
                 { "DumpCore",    config_parse_bool,         &arg_dump_core,     "Manager" },
                 { "CrashShell",  config_parse_bool,         &arg_crash_shell,   "Manager" },
                 { "ShowStatus",  config_parse_bool,         &arg_show_status,   "Manager" },
+#ifdef HAVE_SYSV_COMPAT
                 { "SysVConsole", config_parse_bool,         &arg_sysv_console,  "Manager" },
+#endif
                 { "CrashChVT",   config_parse_int,          &arg_crash_chvt,    "Manager" },
                 { "CPUAffinity", config_parse_cpu_affinity, NULL,               "Manager" },
                 { "MountAuto",   config_parse_bool,         &arg_mount_auto,    "Manager" },
@@ -539,11 +545,9 @@ static int parse_config_file(void) {
 }
 
 static int parse_proc_cmdline(void) {
-        char *line;
+        char *line, *w, *state;
         int r;
-        char *w;
         size_t l;
-        char *state;
 
         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
@@ -608,7 +612,9 @@ static int parse_argv(int argc, char *argv[]) {
                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
+#ifdef HAVE_SYSV_COMPAT
                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
+#endif
                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
                 { NULL,                       0,                 NULL, 0                            }
@@ -712,7 +718,7 @@ static int parse_argv(int argc, char *argv[]) {
                         } else
                                 arg_show_status = true;
                         break;
-
+#ifdef HAVE_SYSV_COMPAT
                 case ARG_SYSV_CONSOLE:
 
                         if (optarg) {
@@ -724,6 +730,7 @@ static int parse_argv(int argc, char *argv[]) {
                         } else
                                 arg_sysv_console = true;
                         break;
+#endif
 
                 case ARG_DESERIALIZE: {
                         int fd;
@@ -811,7 +818,9 @@ static int help(void) {
                "     --crash-shell               Run shell on crash\n"
                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
+#ifdef HAVE_SYSV_COMPAT
                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
+#endif
                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
                "     --log-color[=0|1]           Highlight important log messages\n"
@@ -880,6 +889,7 @@ int main(int argc, char *argv[]) {
         int r, retval = EXIT_FAILURE;
         FDSet *fds = NULL;
         bool reexecute = false;
+        const char *shutdown_verb = NULL;
 
         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
                 /* This is compatbility support for SysV, where
@@ -963,6 +973,11 @@ int main(int argc, char *argv[]) {
                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                arg_running_as == MANAGER_SYSTEM);
 
+        /* Unset some environment variables passed in from the kernel
+         * that don't really make sense for us. */
+        unsetenv("HOME");
+        unsetenv("TERM");
+
         /* Move out of the way, so that we won't block unmounts */
         assert_se(chdir("/")  == 0);
 
@@ -996,12 +1011,16 @@ int main(int argc, char *argv[]) {
                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
 
         if (arg_running_as == MANAGER_SYSTEM && !serialization) {
+                locale_setup();
+
                 if (arg_show_status)
                         status_welcome();
 
                 kmod_setup();
                 hostname_setup();
                 loopback_setup();
+
+                mkdir_p("/dev/.systemd/ask-password/", 0755);
         }
 
         if ((r = manager_new(arg_running_as, &m)) < 0) {
@@ -1011,7 +1030,9 @@ int main(int argc, char *argv[]) {
 
         m->confirm_spawn = arg_confirm_spawn;
         m->show_status = arg_show_status;
+#ifdef HAVE_SYSV_COMPAT
         m->sysv_console = arg_sysv_console;
+#endif
         m->mount_auto = arg_mount_auto;
         m->swap_auto = arg_swap_auto;
 
@@ -1043,8 +1064,10 @@ int main(int argc, char *argv[]) {
                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
                         log_error("Failed to load default target: %s", bus_error(&error, r));
                         dbus_error_free(&error);
-                } else if (target->meta.load_state != UNIT_LOADED)
+                } else if (target->meta.load_state == UNIT_ERROR)
                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
+                else if (target->meta.load_state == UNIT_MASKED)
+                        log_error("Default target masked.");
 
                 if (!target || target->meta.load_state != UNIT_LOADED) {
                         log_info("Trying to load rescue target...");
@@ -1053,12 +1076,17 @@ int main(int argc, char *argv[]) {
                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
                                 dbus_error_free(&error);
                                 goto finish;
-                        } else if (target->meta.load_state != UNIT_LOADED) {
+                        } else if (target->meta.load_state == UNIT_ERROR) {
                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
                                 goto finish;
+                        } else if (target->meta.load_state == UNIT_MASKED) {
+                                log_error("Rescue target masked.");
+                                goto finish;
                         }
                 }
 
+                assert(target->meta.load_state == UNIT_LOADED);
+
                 if (arg_action == ACTION_TEST) {
                         printf("-> By units:\n");
                         manager_dump_units(m, stdout, "\t");
@@ -1105,6 +1133,23 @@ int main(int argc, char *argv[]) {
                         log_notice("Reexecuting.");
                         goto finish;
 
+                case MANAGER_REBOOT:
+                case MANAGER_POWEROFF:
+                case MANAGER_HALT:
+                case MANAGER_KEXEC: {
+                        static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
+                                [MANAGER_REBOOT] = "reboot",
+                                [MANAGER_POWEROFF] = "poweroff",
+                                [MANAGER_HALT] = "halt",
+                                [MANAGER_KEXEC] = "kexec"
+                        };
+
+                        assert_se(shutdown_verb = table[m->exit_code]);
+
+                        log_notice("Shutting down.");
+                        goto finish;
+                }
+
                 default:
                         assert_not_reached("Unknown exit code.");
                 }
@@ -1156,10 +1201,12 @@ finish:
                 else
                         args[i++] = "--show-status=0";
 
+#ifdef HAVE_SYSV_COMPAT
                 if (arg_sysv_console)
                         args[i++] = "--sysv-console=1";
                 else
                         args[i++] = "--sysv-console=0";
+#endif
 
                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
                 char_array_0(sfd);
@@ -1182,6 +1229,17 @@ finish:
         if (fds)
                 fdset_free(fds);
 
+        if (shutdown_verb) {
+                const char * command_line[] = {
+                        SYSTEMD_SHUTDOWN_BINARY_PATH,
+                        shutdown_verb,
+                        NULL
+                };
+
+                execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
+                log_error("Failed to execute shutdown binary, freezing: %m");
+        }
+
         if (getpid() == 1)
                 freeze();