| 1 | /* |
| 2 | * Copyright (c) 2014 Ian Sutton <ian@kremlin.cc> |
| 3 | * |
| 4 | * Permission to use, copy, modify, and distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | */ |
| 16 | |
| 17 | #include <unistd.h> |
| 18 | #include <limits.h> |
| 19 | #include <signal.h> |
| 20 | |
| 21 | #include <sys/param.h> |
| 22 | #include <string.h> |
| 23 | |
| 24 | #include <glib/gprintf.h> |
| 25 | #include <glib-unix.h> |
| 26 | |
| 27 | #include "timedated-gen.h" |
| 28 | #include "timedated.h" |
| 29 | |
| 30 | GPtrArray *timedated_freeable; |
| 31 | Timedate1 *timedated_interf; |
| 32 | |
| 33 | GMainLoop *timedated_loop; |
| 34 | |
| 35 | guint bus_descriptor; |
| 36 | gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */ |
| 37 | |
| 38 | /* --- begin method/property/dbus signal code --- */ |
| 39 | |
| 40 | /*static gboolean |
| 41 | on_handle_set_hostname(Timedate1 *hn1_passed_interf, |
| 42 | GDBusMethodInvocation *invoc, |
| 43 | const gchar *greet, |
| 44 | gpointer data) { |
| 45 | return FALSE; |
| 46 | }*/ |
| 47 | |
| 48 | /*const gchar * |
| 49 | our_get_hostname() { |
| 50 | |
| 51 | gchar *hostname_buf, *ret; |
| 52 | size_t hostname_divider; |
| 53 | |
| 54 | hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); |
| 55 | ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); |
| 56 | g_ptr_array_add(timedated_freeable, hostname_buf); |
| 57 | g_ptr_array_add(timedated_freeable, ret); |
| 58 | |
| 59 | if(gethostname(hostname_buf, MAXHOSTNAMELEN)) |
| 60 | return ""; |
| 61 | |
| 62 | hostname_divider = strcspn(hostname_buf, "."); |
| 63 | |
| 64 | return strncpy(ret, hostname_buf, hostname_divider); |
| 65 | }*/ |
| 66 | |
| 67 | /* --- end method/property/dbus signal code, begin bus/name handlers --- */ |
| 68 | |
| 69 | static void timedated_on_bus_acquired(GDBusConnection *conn, |
| 70 | const gchar *name, |
| 71 | gpointer user_data) { |
| 72 | |
| 73 | g_print("got bus/name, exporting %s's interface...\n", name); |
| 74 | |
| 75 | timedated_interf = timedate1_skeleton_new(); |
| 76 | |
| 77 | /* attach function pointers to generated struct's method handlers |
| 78 | g_signal_connect(timedated_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL);*/ |
| 79 | |
| 80 | /* set our properties before export |
| 81 | timedate1_set_hostname(timedated_interf, our_get_hostname()); */ |
| 82 | |
| 83 | if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(timedated_interf), |
| 84 | conn, |
| 85 | "/org/freedesktop/timedate1", |
| 86 | NULL)) { |
| 87 | |
| 88 | g_printf("failed to export %s's interface!\n", name); |
| 89 | timedated_mem_clean(); |
| 90 | |
| 91 | } else { |
| 92 | |
| 93 | dbus_interface_exported = TRUE; |
| 94 | g_printf("exported %s's interface on the system bus...\n", name); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | static void timedated_on_name_acquired(GDBusConnection *conn, |
| 99 | const gchar *name, |
| 100 | gpointer user_data) { |
| 101 | |
| 102 | g_printf("success!\n"); |
| 103 | } |
| 104 | |
| 105 | static void timedated_on_name_lost(GDBusConnection *conn, |
| 106 | const gchar *name, |
| 107 | gpointer user_data) { |
| 108 | |
| 109 | if(!conn) { |
| 110 | |
| 111 | g_printf("failed to connect to the system bus while trying to acquire name '%s': either dbus-daemon isn't running or we don't have permission to push names and/or their interfaces to it.\n", name); |
| 112 | timedated_mem_clean(); |
| 113 | } |
| 114 | |
| 115 | g_print("lost name %s, exiting...\n", name); |
| 116 | |
| 117 | timedated_mem_clean(); |
| 118 | } |
| 119 | |
| 120 | /* --- end bus/name handlers, begin misc unix functions --- */ |
| 121 | |
| 122 | /* safe call to clean and then exit |
| 123 | * this stops our GMainLoop safely before letting main() return */ |
| 124 | void timedated_mem_clean() { |
| 125 | |
| 126 | g_printf("exiting...\n"); |
| 127 | |
| 128 | if(dbus_interface_exported) |
| 129 | g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(timedated_interf)); |
| 130 | |
| 131 | if(g_main_loop_is_running(timedated_loop)) |
| 132 | g_main_loop_quit(timedated_loop); |
| 133 | |
| 134 | } |
| 135 | |
| 136 | /* wrapper for glib's unix signal handling; called only once if terminating signal is raised against us */ |
| 137 | gboolean unix_sig_terminate_handler(gpointer data) { |
| 138 | |
| 139 | g_printf("caught SIGINT/HUP/TERM, exiting\n"); |
| 140 | |
| 141 | timedated_mem_clean(); |
| 142 | return G_SOURCE_REMOVE; |
| 143 | } |
| 144 | |
| 145 | void set_signal_handlers() { |
| 146 | |
| 147 | /* we don't care about its descriptor, we never need to unregister these */ |
| 148 | g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL); |
| 149 | g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL); |
| 150 | g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL); |
| 151 | } |
| 152 | |
| 153 | int main() { |
| 154 | |
| 155 | set_signal_handlers(); |
| 156 | |
| 157 | timedated_loop = g_main_loop_new(NULL, TRUE); |
| 158 | timedated_freeable = g_ptr_array_new(); |
| 159 | |
| 160 | bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, |
| 161 | "org.freedesktop.timedate1", |
| 162 | G_BUS_NAME_OWNER_FLAGS_NONE, |
| 163 | timedated_on_bus_acquired, |
| 164 | timedated_on_name_acquired, |
| 165 | timedated_on_name_lost, |
| 166 | NULL, |
| 167 | NULL); |
| 168 | |
| 169 | g_main_loop_run(timedated_loop); |
| 170 | /* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */ |
| 171 | g_main_loop_unref(timedated_loop); |
| 172 | |
| 173 | /* guaranteed unownable */ |
| 174 | g_bus_unown_name(bus_descriptor); |
| 175 | |
| 176 | /* at this point no operations can occur with our data, it is safe to free it + its container */ |
| 177 | g_ptr_array_free(timedated_freeable, TRUE); |
| 178 | |
| 179 | return 0; |
| 180 | } |