X-Git-Url: https://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=blobdiff_plain;f=src%2Finterfaces%2Fhostnamed%2Fhostnamed.c;h=38d811cd952f078a59f3442a967574a0edb058a1;hp=114ad10043d138b85cf143b7ad39a86976b9342f;hb=a2fffc07173bab908d10ac2d66f73d33f085c601;hpb=6de394d4129d558807da8d52bc736494ccfbb387 diff --git a/src/interfaces/hostnamed/hostnamed.c b/src/interfaces/hostnamed/hostnamed.c index 114ad10..38d811c 100644 --- a/src/interfaces/hostnamed/hostnamed.c +++ b/src/interfaces/hostnamed/hostnamed.c @@ -1,127 +1,364 @@ -#include +/* + * Copyright (c) 2014 Ian Sutton + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include + +#include +#include + +#include +#include + +#include "hostnamed-gen.h" #include "hostnamed.h" -GDBusNodeInfo *spect_data; -GMainLoop *loop; - -static void handle_method_call(GDBusConnection *conn, - const gchar *sender, - const gchar *obj_path, - const gchar *interf_name, - const gchar *method_name, - GVariant *params, - GDBusMethodInvocation *invc, - gpointer usrdat) { - - g_printf("%s wants to call %s, at %s with interface %s\n", sender, method_name, obj_path, interf_name); - - GString *xml_ret; - GVariant *xml_ret_gvar; - - g_dbus_interface_info_generate_xml(spect_data->interfaces[0], (guint)0, xml_ret); - xml_ret_gvar = g_variant_new_string(xml_ret->str); - g_dbus_method_invocation_return_value(invc, xml_ret_gvar); - -} - -static GVariant * handle_get_property(GDBusConnection *conn, - const gchar *sender, - const gchar *obj_path, - const gchar *interf_name, - const gchar *prop_name, - GError **err, - gpointer usr_data) { - - GVariant *ret; - - return ret; -} - -static gboolean handle_set_property(GDBusConnection *conn, - const gchar *sender, - const gchar *obj_path, - const gchar *interf_name, - const gchar *prop_name, - GVariant *val, - GError **err, - gpointer usr_data) { - - g_dbus_connection_emit_signal(conn, - NULL, - obj_path, - "org.freedesktop.DBus.Properties", - "PropertiesChanged", - NULL, /* incorrect */ - NULL); - - return TRUE; -} - -/* "hot" functions initially passed to gdbus */ -static const GDBusInterfaceVTable interface_vtable = -{ - handle_method_call, - handle_get_property, - handle_set_property -}; - -/* end method/property functions, begin bus name handlers - * TODO: these should be intertwined as to handle edge cases - * for when the system cannot immediately grab the name, as - * well as cases where the system unintendedly loses the name +GPtrArray *hostnamed_freeable; +Hostname1 *hostnamed_interf; + +GMainLoop *hostnamed_loop; + +guint bus_descriptor; +gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */ + +/* --- begin method/property/dbus signal code --- */ + +static gboolean +on_handle_set_hostname(Hostname1 *hn1_passed_interf, + GDBusMethodInvocation *invoc, + const gchar *greet, + gpointer data) { + return FALSE; +} + +static gboolean +on_handle_set_static_hostname(Hostname1 *hn1_passed_interf, + GDBusMethodInvocation *invoc, + const gchar *greet, + gpointer data) { + return FALSE; +} + +static gboolean +on_handle_set_pretty_hostname(Hostname1 *hn1_passed_interf, + GDBusMethodInvocation *invoc, + const gchar *greet, + gpointer data) { + return FALSE; +} + +static gboolean +on_handle_set_chassis(Hostname1 *hn1_passed_interf, + GDBusMethodInvocation *invoc, + const gchar *greet, + gpointer data) { + return FALSE; +} + +static gboolean +on_handle_set_icon_name(Hostname1 *hn1_passed_interf, + GDBusMethodInvocation *invoc, + const gchar *greet, + gpointer data) { + return FALSE; +} + +/* note: all hostnamed/hostname1's properties are read-only, + * and do not need set_ functions, gdbus-codegen realized + * this from the XML and handled the to-be error of trying + * to set a read-only property's value */ -static void on_bus_acquired(GDBusConnection *conn, - const gchar *name, - gpointer user_data) { - g_print("got bus, name: %s\n", name); - - guint reg_id; - reg_id = g_dbus_connection_register_object(conn, - "/org/freedesktop/hostname1", - spect_data->interfaces[0], - &interface_vtable, - NULL, - NULL, - NULL); - g_assert(reg_id > 0); +const gchar * +our_get_hostname() { + + gchar *hostname_buf, *ret; + size_t hostname_divider; + + hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); + ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); + + g_ptr_array_add(hostnamed_freeable, hostname_buf); + g_ptr_array_add(hostnamed_freeable, ret); + + if(gethostname(hostname_buf, MAXHOSTNAMELEN) || g_strcmp0(hostname_buf, "") == 0) + return "localhost"; + + hostname_divider = strcspn(hostname_buf, "."); + + return strncpy(ret, hostname_buf, hostname_divider); +} + +const gchar * +our_get_static_hostname() { + + gchar *pretty_hostname; + gchar *ret; + + pretty_hostname = our_get_pretty_hostname(); + + if(g_strcmp0(pretty_hostname, "") == 0) + ret = our_get_hostname(); + + else if(ret = g_hostname_to_ascii(pretty_hostname)) { + + g_ptr_array_add(hostnamed_freeable, ret); + return ret; + } + + return ret; +} + +const gchar * +our_get_pretty_hostname() { + + GKeyFile *config; + gchar *ret; + + if(g_key_file_load_from_file(config, "/etc/systemd_compat.conf", G_KEY_FILE_NONE, NULL) + && ret = g_key_file_get_value(config, "hostnamed", "PrettyHostname", NULL)) { /* ret might need to be freed, docs dont specify but i am suspicious */ + + g_free(config); + return ret; + } + + if(config) + g_free(config); + + return ""; +} + +const gchar * +our_get_chassis() { + + return "TODO"; +} + +const gchar * +our_get_icon_name() { + + return "TODO"; +} + +const gchar * +our_get_kernel_name() { + + return "TODO"; } -static void on_name_acquired(GDBusConnection *conn, - const gchar *name, - gpointer user_data) { +const gchar * +our_get_kernel_version() { - g_print("got name %s\n", name); + return "TODO"; } -static void on_name_lost(GDBusConnection *conn, - const gchar *name, - gpointer user_data) { +const gchar * +our_get_kernel_release() { - g_print("lost name %s, exiting...\n", name); - g_main_loop_quit(loop); + return "TODO"; } -/* safe call to try and start hostnamed */ -GError * hostnamed_init() { +const gchar * +our_get_os_cpename() { - guint bus_descriptor; - GError *err = NULL; + return "TODO"; +} + +const gchar * +our_get_os_pretty_name() { + + return "TODO"; +} + +/* --- end method/property/dbus signal code, begin bus/name handlers --- */ + +static void hostnamed_on_bus_acquired(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { + + g_printf("got bus/name, exporting %s's interface...\n", name); + + hostnamed_interf = hostname1_skeleton_new(); + + /* attach function pointers to generated struct's method handlers */ + g_signal_connect(hostnamed_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL); + g_signal_connect(hostnamed_interf, "handle-set-static-hostname", G_CALLBACK(on_handle_set_static_hostname), NULL); + g_signal_connect(hostnamed_interf, "handle-set-pretty-hostname", G_CALLBACK(on_handle_set_pretty_hostname), NULL); + g_signal_connect(hostnamed_interf, "handle-set-chassis", G_CALLBACK(on_handle_set_chassis), NULL); + g_signal_connect(hostnamed_interf, "handle-set-icon-name", G_CALLBACK(on_handle_set_icon_name), NULL); + + /* set our properties before export */ + hostname1_set_hostname(hostnamed_interf, our_get_hostname()); + hostname1_set_static_hostname(hostnamed_interf, our_get_static_hostname()); + hostname1_set_pretty_hostname(hostnamed_interf, our_get_pretty_hostname()); + hostname1_set_chassis(hostnamed_interf, our_get_chassis()); + hostname1_set_icon_name(hostnamed_interf, our_get_icon_name()); + hostname1_set_kernel_name(hostnamed_interf, our_get_kernel_name()); + hostname1_set_kernel_version(hostnamed_interf, our_get_kernel_version()); + hostname1_set_kernel_release(hostnamed_interf, our_get_kernel_release()); + hostname1_set_operating_system_cpename(hostnamed_interf, our_get_os_cpename()); + hostname1_set_operating_system_pretty_name(hostnamed_interf, our_get_os_pretty_name()); + + if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(hostnamed_interf), + conn, + "/org/freedesktop/hostname1", + NULL)) { + + g_printf("failed to export %s's interface!\n", name); /* unusual edge case, TODO check errno */ + hostnamed_mem_clean(); + + } else { + + dbus_interface_exported = TRUE; + g_printf("exported %s's interface on the system bus...\n", name); + } +} + +static void hostnamed_on_name_acquired(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { + + g_printf("success!\n"); +} + +static void hostnamed_on_name_lost(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { + + if(!conn) { + + 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); + hostnamed_mem_clean(); + } + + g_printf("lost name %s, exiting...\n", name); + + hostnamed_mem_clean(); +} + +/* --- end bus/name handlers, begin misc unix functions --- */ + +/* safe call to clean and then exit + * this stops our GMainLoop safely before letting main() return */ +void hostnamed_mem_clean() { - spect_data = g_dbus_node_info_new_for_xml(SYSTEMD_HOSTNAMED_XML, &err); + g_printf("exiting...\n"); - bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, - (gchar *)"org.freedesktop.hostname1", - G_BUS_NAME_OWNER_FLAGS_NONE, - on_bus_acquired, - on_name_acquired, - on_name_lost, - NULL, - NULL); + if(dbus_interface_exported) + g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf)); - loop = g_main_loop_new(NULL, FALSE); - g_main_loop_run(loop); + if(g_main_loop_is_running(hostnamed_loop)) + g_main_loop_quit(hostnamed_loop); - //TODO: malloc and return reference as if a main() closed - return err; } + +/* wrapper for glib's unix signal handling; called only once if terminatating signal is raised against us */ +gboolean unix_sig_terminate_handler(gpointer data) { + + g_printf("caught SIGINT/HUP/TERM, exiting\n"); + + hostnamed_mem_clean(); + return G_SOURCE_REMOVE; +} + +void set_signal_handlers() { + + /* we don't care about its descriptor, we never need to unregister these */ + g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL); + g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL); + g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL); + + /* TODO: the "only once" guarantee only counts towards specific signals. + * make sure calling a SIGINT and SIGHUP doesn't cause term_handler() + * to be called twice */ +} + +int main() { + + set_signal_handlers(); + + hostnamed_loop = g_main_loop_new(NULL, TRUE); + hostnamed_freeable = g_ptr_array_new(); + + bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, + "org.freedesktop.hostname1", + G_BUS_NAME_OWNER_FLAGS_NONE, + hostnamed_on_bus_acquired, + hostnamed_on_name_acquired, + hostnamed_on_name_lost, + NULL, + NULL); + + g_main_loop_run(hostnamed_loop); + /* runs until single g_main_loop_quit() call is raised inside _mem_clean() */ + g_main_loop_unref(hostnamed_loop); + + /* guaranteed unownable */ + g_bus_unown_name(bus_descriptor); + + /* at this point no operations can occur with our data, it is safe to free it + its container */ + g_ptr_array_free(hostnamed_freeable, TRUE); + + return 0; +} + +/* TODO figure out DMI variables on obsd */ +/*static gchar *guess_icon_name() { + + gchar *filebuf = NULL; + gchar *ret = NULL; + + #if defined(__i386__) || defined(__x86_64__) + + Taken with a few minor changes from systemd's hostnamed.c, + copyright 2011 Lennart Poettering. + + See the SMBIOS Specification 2.7.1 section 7.4.1 for + details about the values listed here: + + http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_2.7.1.pdf + + + if (g_file_get_contents ("/sys/class/dmi/id/chassis_type", &filebuf, NULL, NULL)) { + switch (g_ascii_strtoull (filebuf, NULL, 10)) { + case 0x3: + case 0x4: + case 0x5: + case 0x6: + case 0x7: + ret = g_strdup ("computer-desktop"); + goto out; + case 0x9: + case 0xA: + case 0xE: + ret = g_strdup ("computer-laptop"); + goto out; + case 0x11: + case 0x17: + case 0x1C: + case 0x1D: + ret = g_strdup ("computer-server"); + goto out; + } + } + #endif + ret = g_strdup ("computer"); + out: + g_free (filebuf); + return ret; +}*/ +