chiark / gitweb /
logind: trivial simplification
[elogind.git] / src / login / inhibit.c
index 3ab86ac..896fd57 100644 (file)
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
 /***
   This file is part of systemd.
 
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <fcntl.h>
 #include <getopt.h>
-#include <assert.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
-#include <fcntl.h>
 
 #include "sd-bus.h"
 
-#include "bus-util.h"
+#include "alloc-util.h"
 #include "bus-error.h"
-#include "util.h"
-#include "build.h"
+#include "bus-util.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "process-util.h"
+#include "signal-util.h"
 #include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+/// Additional includes needed by elogind
+#include "musl_missing.h"
 
 static const char* arg_what = "idle:sleep:shutdown";
 static const char* arg_who = NULL;
 static const char* arg_why = "Unknown reason";
-static const char* arg_mode = "block";
+static const char* arg_mode = NULL;
 
 static enum {
         ACTION_INHIBIT,
@@ -45,7 +50,7 @@ static enum {
 } arg_action = ACTION_INHIBIT;
 
 static int inhibit(sd_bus *bus, sd_bus_error *error) {
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
         int r;
         int fd;
 
@@ -63,9 +68,9 @@ static int inhibit(sd_bus *bus, sd_bus_error *error) {
 
         r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd);
         if (r < 0)
-                return -EIO;
+                return r;
 
-        r = dup(fd);
+        r = fcntl(fd, F_DUPFD_CLOEXEC, 3);
         if (r < 0)
                 return -errno;
 
@@ -73,7 +78,7 @@ static int inhibit(sd_bus *bus, sd_bus_error *error) {
 }
 
 static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
         const char *what, *who, *why, *mode;
         unsigned int uid, pid;
         unsigned n = 0;
@@ -93,19 +98,22 @@ static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
 
         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
         if (r < 0)
-                return -EIO;
+                return bus_log_parse_error(r);
 
         while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
                 _cleanup_free_ char *comm = NULL, *u = NULL;
 
+                if (arg_mode && !streq(mode, arg_mode))
+                        continue;
+
                 get_process_comm(pid, &comm);
                 u = uid_to_name(uid);
 
-                printf("     Who: %s (UID %lu/%s, PID %lu/%s)\n"
+                printf("     Who: %s (UID "UID_FMT"/%s, PID "PID_FMT"/%s)\n"
                        "    What: %s\n"
                        "     Why: %s\n"
                        "    Mode: %s\n\n",
-                       who, (unsigned long) uid, strna(u), (unsigned long) pid, strna(comm),
+                       who, uid, strna(u), pid, strna(comm),
                        what,
                        why,
                        mode);
@@ -113,18 +121,17 @@ static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
                 n++;
         }
         if (r < 0)
-                return -EIO;
+                return bus_log_parse_error(r);
 
         r = sd_bus_message_exit_container(reply);
         if (r < 0)
-                return -EIO;
+                return bus_log_parse_error(r);
 
         printf("%u inhibitors listed.\n", n);
         return 0;
 }
 
-static int help(void) {
-
+static void help(void) {
         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
                "Execute a process while inhibiting shutdown/sleep/idle.\n\n"
                "  -h --help               Show this help\n"
@@ -136,10 +143,8 @@ static int help(void) {
                "     --who=STRING         A descriptive string who is inhibiting\n"
                "     --why=STRING         A descriptive string why is being inhibited\n"
                "     --mode=MODE          One of block or delay\n"
-               "     --list               List active inhibitors\n",
-               program_invocation_short_name);
-
-        return 0;
+               "     --list               List active inhibitors\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -161,7 +166,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "why",          required_argument, NULL, ARG_WHY          },
                 { "mode",         required_argument, NULL, ARG_MODE         },
                 { "list",         no_argument,       NULL, ARG_LIST         },
-                { NULL,           0,                 NULL, 0                }
+                {}
         };
 
         int c;
@@ -169,7 +174,7 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0)
 
                 switch (c) {
 
@@ -178,9 +183,7 @@ static int parse_argv(int argc, char *argv[]) {
                         return 0;
 
                 case ARG_VERSION:
-                        puts(PACKAGE_STRING);
-                        puts(SYSTEMD_FEATURES);
-                        return 0;
+                        return version();
 
                 case ARG_WHAT:
                         arg_what = optarg;
@@ -202,13 +205,14 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_action = ACTION_LIST;
                         break;
 
-                default:
-                        log_error("Unknown option code %c", c);
+                case '?':
                         return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
                 }
-        }
 
-        if (arg_action == ACTION_INHIBIT && argc == 1)
+        if (arg_action == ACTION_INHIBIT && optind == argc)
                 arg_action = ACTION_LIST;
 
         else if (arg_action == ACTION_INHIBIT && optind >= argc) {
@@ -220,20 +224,23 @@ static int parse_argv(int argc, char *argv[]) {
 }
 
 int main(int argc, char *argv[]) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _cleanup_bus_unref_ sd_bus *bus = NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
+        elogind_set_program_name(argv[0]);
         log_parse_environment();
         log_open();
 
         r = parse_argv(argc, argv);
-        if (r <= 0)
+        if (r < 0)
                 return EXIT_FAILURE;
+        if (r == 0)
+                return EXIT_SUCCESS;
 
-        r = sd_bus_open_system(&bus);
+        r = sd_bus_default_system(&bus);
         if (r < 0) {
-                log_error("Failed to connect to bus: %s", strerror(-r));
+                log_error_errno(r, "Failed to connect to bus: %m");
                 return EXIT_FAILURE;
         }
 
@@ -253,29 +260,35 @@ int main(int argc, char *argv[]) {
                 if (!arg_who)
                         arg_who = w = strv_join(argv + optind, " ");
 
+                if (!arg_mode)
+                        arg_mode = "block";
+
                 fd = inhibit(bus, &error);
                 if (fd < 0) {
-                        log_error("Failed to inhibit: %s", bus_error_message(&error, -r));
+                        log_error("Failed to inhibit: %s", bus_error_message(&error, fd));
                         return EXIT_FAILURE;
                 }
 
                 pid = fork();
                 if (pid < 0) {
-                        log_error("Failed to fork: %m");
+                        log_error_errno(errno, "Failed to fork: %m");
                         return EXIT_FAILURE;
                 }
 
                 if (pid == 0) {
                         /* Child */
 
+                        (void) reset_all_signal_handlers();
+                        (void) reset_signal_mask();
+
                         close_all_fds(NULL, 0);
 
                         execvp(argv[optind], argv + optind);
-                        log_error("Failed to execute %s: %m", argv[optind]);
+                        log_error_errno(errno, "Failed to execute %s: %m", argv[optind]);
                         _exit(EXIT_FAILURE);
                 }
 
-                r = wait_for_terminate_and_warn(argv[optind], pid);
+                r = wait_for_terminate_and_warn(argv[optind], pid, true);
                 return r < 0 ? EXIT_FAILURE : r;
         }