src/portable/portabled.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "sd-bus.h"
   4 #include "sd-daemon.h"
   5
   6 #include "alloc-util.h"
   7 #include "bus-util.h"
   8 #include "def.h"
   9 #include "portabled-bus.h"
  10 #include "portabled-image-bus.h"
  11 #include "portabled.h"
  12 #include "process-util.h"
  13 #include "signal-util.h"
  14
  15 static Manager* manager_unref(Manager *m);
  16 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref);
  17
  18 static int manager_new(Manager **ret) {
  19         _cleanup_(manager_unrefp) Manager *m = NULL;
  20         int r;
  21
  22         assert(ret);
  23
  24         m = new0(Manager, 1);
  25         if (!m)
  26                 return -ENOMEM;
  27
  28         r = sd_event_default(&m->event);
  29         if (r < 0)
  30                 return r;
  31
  32         r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
  33         if (r < 0)
  34                 return r;
  35
  36         r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
  37         if (r < 0)
  38                 return r;
  39
  40         (void) sd_event_set_watchdog(m->event, true);
  41
  42         *ret = TAKE_PTR(m);
  43         return 0;
  44 }
  45
  46 static Manager* manager_unref(Manager *m) {
  47         assert(m);
  48
  49         hashmap_free_with_destructor(m->image_cache, image_unref);
  50
  51         sd_event_source_unref(m->image_cache_defer_event);
  52
  53         bus_verify_polkit_async_registry_free(m->polkit_registry);
  54
  55         sd_bus_unref(m->bus);
  56         sd_event_unref(m->event);
  57
  58         return mfree(m);
  59 }
  60
  61 static int manager_connect_bus(Manager *m) {
  62         int r;
  63
  64         assert(m);
  65         assert(!m->bus);
  66
  67         r = sd_bus_default_system(&m->bus);
  68         if (r < 0)
  69                 return log_error_errno(r, "Failed to connect to system bus: %m");
  70
  71         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/portable1", "org.freedesktop.portable1.Manager", manager_vtable, m);
  72         if (r < 0)
  73                 return log_error_errno(r, "Failed to add manager object vtable: %m");
  74
  75         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/portable1/image", "org.freedesktop.portable1.Image", image_vtable, bus_image_object_find, m);
  76         if (r < 0)
  77                 return log_error_errno(r, "Failed to add image object vtable: %m");
  78
  79         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/portable1/image", bus_image_node_enumerator, m);
  80         if (r < 0)
  81                 return log_error_errno(r, "Failed to add image enumerator: %m");
  82
  83         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.portable1", 0, NULL, NULL);
  84         if (r < 0)
  85                 return log_error_errno(r, "Failed to request name: %m");
  86
  87         r = sd_bus_attach_event(m->bus, m->event, 0);
  88         if (r < 0)
  89                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
  90
  91         (void) sd_bus_set_exit_on_disconnect(m->bus, true);
  92
  93         return 0;
  94 }
  95
  96 static int manager_startup(Manager *m) {
  97         int r;
  98
  99         assert(m);
 100
 101         r = manager_connect_bus(m);
 102         if (r < 0)
 103                 return r;
 104
 105         return 0;
 106 }
 107
 108 static bool check_idle(void *userdata) {
 109         Manager *m = userdata;
 110
 111         return !m->operations;
 112 }
 113
 114 static int manager_run(Manager *m) {
 115         assert(m);
 116
 117         return bus_event_loop_with_idle(
 118                         m->event,
 119                         m->bus,
 120                         "org.freedesktop.portable1",
 121                         DEFAULT_EXIT_USEC,
 122                         check_idle, m);
 123 }
 124
 125 int main(int argc, char *argv[]) {
 126         _cleanup_(manager_unrefp) Manager *m = NULL;
 127         int r;
 128
 129         log_set_target(LOG_TARGET_AUTO);
 130         log_parse_environment();
 131         log_open();
 132
 133         umask(0022);
 134
 135         if (argc != 1) {
 136                 log_error("This program takes no arguments.");
 137                 r = -EINVAL;
 138                 goto finish;
 139         }
 140
 141         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0);
 142
 143         r = manager_new(&m);
 144         if (r < 0) {
 145                 log_error_errno(r, "Failed to allocate manager object: %m");
 146                 goto finish;
 147         }
 148
 149         r = manager_startup(m);
 150         if (r < 0) {
 151                 log_error_errno(r, "Failed to fully start up daemon: %m");
 152                 goto finish;
 153         }
 154
 155         log_debug("systemd-portabled running as pid " PID_FMT, getpid_cached());
 156
 157         sd_notify(false,
 158                   "READY=1\n"
 159                   "STATUS=Processing requests...");
 160
 161         r = manager_run(m);
 162
 163         log_debug("systemd-portabled stopped as pid " PID_FMT, getpid_cached());
 164
 165 finish:
 166         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 167
 168 }