3b82e3c1 |
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 | |
a35a69c5 |
17 | #include <unistd.h> |
18 | #include <limits.h> |
0f339959 |
19 | #include <signal.h> |
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20 | |
d15318db |
21 | #include <sys/param.h> |
f1ad9351 |
22 | #include <sys/sysctl.h> |
28cac2f0 |
23 | #include <string.h> |
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24 | |
4c04b514 |
25 | #include <glib/gprintf.h> |
8caf1f61 |
26 | #include <glib-unix.h> |
4c04b514 |
27 | |
1e8c7c88 |
28 | #include "hostnamed-gen.h" |
0f339959 |
29 | #include "hostnamed.h" |
a35a69c5 |
30 | |
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31 | GPtrArray *hostnamed_freeable; |
1be94ede |
32 | Hostname1 *hostnamed_interf; |
3d53b501 |
33 | |
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34 | GMainLoop *hostnamed_loop; |
35 | |
36 | guint bus_descriptor; |
37 | gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */ |
38 | |
1ce41045 |
39 | /* --- begin method/property/dbus signal code --- */ |
76b67a18 |
40 | |
f1ad9351 |
41 | /* add any sysctl strings that suggest virtualization here */ |
42 | const gchar* vmstring_list[] = { |
43 | "QEMU Virtual CPU", |
44 | "SmartDC HVM", |
45 | "KVM", |
46 | "VirtualBox" |
47 | }; |
48 | |
49 | static gboolean is_vm; |
50 | |
3d53b501 |
51 | static gboolean |
1be94ede |
52 | on_handle_set_hostname(Hostname1 *hn1_passed_interf, |
3d53b501 |
53 | GDBusMethodInvocation *invoc, |
54 | const gchar *greet, |
55 | gpointer data) { |
56 | return FALSE; |
57 | } |
58 | |
59 | static gboolean |
1be94ede |
60 | on_handle_set_static_hostname(Hostname1 *hn1_passed_interf, |
3d53b501 |
61 | GDBusMethodInvocation *invoc, |
62 | const gchar *greet, |
63 | gpointer data) { |
64 | return FALSE; |
65 | } |
66 | |
67 | static gboolean |
1be94ede |
68 | on_handle_set_pretty_hostname(Hostname1 *hn1_passed_interf, |
3d53b501 |
69 | GDBusMethodInvocation *invoc, |
70 | const gchar *greet, |
71 | gpointer data) { |
72 | return FALSE; |
73 | } |
74 | |
75 | static gboolean |
1be94ede |
76 | on_handle_set_chassis(Hostname1 *hn1_passed_interf, |
3d53b501 |
77 | GDBusMethodInvocation *invoc, |
78 | const gchar *greet, |
79 | gpointer data) { |
80 | return FALSE; |
81 | } |
82 | |
83 | static gboolean |
1be94ede |
84 | on_handle_set_icon_name(Hostname1 *hn1_passed_interf, |
3d53b501 |
85 | GDBusMethodInvocation *invoc, |
86 | const gchar *greet, |
87 | gpointer data) { |
88 | return FALSE; |
89 | } |
90 | |
76b67a18 |
91 | /* note: all hostnamed/hostname1's properties are read-only, |
92 | * and do not need set_ functions, gdbus-codegen realized |
93 | * this from the XML and handled the to-be error of trying |
94 | * to set a read-only property's value |
95 | */ |
96 | |
97 | const gchar * |
98 | our_get_hostname() { |
99 | |
90f54407 |
100 | gchar *hostname_buf, *ret; |
101 | size_t hostname_divider; |
d15318db |
102 | |
a2fffc07 |
103 | hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); |
90f54407 |
104 | ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); |
a2fffc07 |
105 | |
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106 | g_ptr_array_add(hostnamed_freeable, hostname_buf); |
107 | g_ptr_array_add(hostnamed_freeable, ret); |
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108 | |
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109 | if(gethostname(hostname_buf, MAXHOSTNAMELEN) || g_strcmp0(hostname_buf, "") == 0) |
110 | return "localhost"; |
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111 | |
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112 | hostname_divider = strcspn(hostname_buf, "."); |
28cac2f0 |
113 | |
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114 | return strncpy(ret, hostname_buf, hostname_divider); |
76b67a18 |
115 | } |
116 | |
117 | const gchar * |
118 | our_get_static_hostname() { |
119 | |
af14252f |
120 | const gchar *pretty_hostname; |
121 | const gchar *ret; |
a2fffc07 |
122 | |
123 | pretty_hostname = our_get_pretty_hostname(); |
124 | |
125 | if(g_strcmp0(pretty_hostname, "") == 0) |
126 | ret = our_get_hostname(); |
127 | |
af14252f |
128 | else if((ret = g_hostname_to_ascii(pretty_hostname))) { |
a2fffc07 |
129 | |
af14252f |
130 | g_ptr_array_add(hostnamed_freeable, (gpointer)ret); |
a2fffc07 |
131 | return ret; |
132 | } |
133 | |
134 | return ret; |
76b67a18 |
135 | } |
136 | |
137 | const gchar * |
138 | our_get_pretty_hostname() { |
139 | |
a2fffc07 |
140 | GKeyFile *config; |
141 | gchar *ret; |
142 | |
f1ad9351 |
143 | config = g_key_file_new(); |
144 | |
a2fffc07 |
145 | if(g_key_file_load_from_file(config, "/etc/systemd_compat.conf", G_KEY_FILE_NONE, NULL) |
af14252f |
146 | && (ret = g_key_file_get_value(config, "hostnamed", "PrettyHostname", NULL))) { /* ret might need to be freed, docs dont specify but i am suspicious */ |
a2fffc07 |
147 | |
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148 | g_key_file_unref(config); |
a2fffc07 |
149 | return ret; |
150 | } |
151 | |
152 | if(config) |
153 | g_free(config); |
154 | |
155 | return ""; |
76b67a18 |
156 | } |
157 | |
158 | const gchar * |
159 | our_get_chassis() { |
160 | |
f1ad9351 |
161 | char *hwproduct, *hwmodel; |
162 | size_t hwproduct_size, hwmodel_size; |
163 | int hwproduct_name[2], hwmodel_name[2]; |
164 | |
165 | hwproduct_name[0] = CTL_HW; |
166 | hwproduct_name[1] = HW_PRODUCT; |
167 | |
168 | hwmodel_name[0] = CTL_HW; |
169 | hwmodel_name[1] = HW_MODEL; |
170 | |
171 | /* pass NULL buffer to check size first, then pass hw to be filled according to freshly-set hw_size */ |
172 | if(sysctl(&hwproduct_name, 2, NULL, &hwproduct_size, NULL, 0) || sysctl(&hwproduct_name, 2, hwproduct, &hwproduct_size, NULL, 0)) |
173 | return "desktop"; /* TODO error properly here */ |
174 | |
175 | if(sysctl(&hwmodel_name, 2, NULL, &hwmodel_size, NULL, 0) || sysctl(&hwmodel_name, 2, hwmodel, &hwmodel_size, NULL, 0)) |
176 | return "desktop"; /* TODO error properly here */ |
177 | |
178 | if(test_against_known_vm_strings(hwproduct) || test_against_known_vm_strings(hwmodel)) |
179 | return "vm"; /*TODO differentiate between VMs (hardware virt, seperate kernel) and containers (paravirt, shared kernel) |
180 | |
181 | /* TODO: test for laptop, if not, dmidecode for desktop vs. server |
182 | * probably move this code to vm test func and set a global after running it early, once */ |
183 | |
184 | return "desktop"; |
76b67a18 |
185 | } |
186 | |
187 | const gchar * |
188 | our_get_icon_name() { |
189 | |
190 | return "TODO"; |
191 | } |
192 | |
193 | const gchar * |
194 | our_get_kernel_name() { |
195 | |
196 | return "TODO"; |
197 | } |
198 | |
199 | const gchar * |
200 | our_get_kernel_version() { |
201 | |
202 | return "TODO"; |
203 | } |
204 | |
205 | const gchar * |
206 | our_get_kernel_release() { |
207 | |
208 | return "TODO"; |
209 | } |
210 | |
211 | const gchar * |
212 | our_get_os_cpename() { |
213 | |
214 | return "TODO"; |
215 | } |
216 | |
217 | const gchar * |
218 | our_get_os_pretty_name() { |
219 | |
220 | return "TODO"; |
221 | } |
222 | |
1ce41045 |
223 | /* --- end method/property/dbus signal code, begin bus/name handlers --- */ |
0df0018d |
224 | |
5b005882 |
225 | static void hostnamed_on_bus_acquired(GDBusConnection *conn, |
1cd5e6fe |
226 | const gchar *name, |
227 | gpointer user_data) { |
d1e1db9e |
228 | |
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229 | g_printf("got bus/name, exporting %s's interface...\n", name); |
d1e1db9e |
230 | |
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231 | hostnamed_interf = hostname1_skeleton_new(); |
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232 | |
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233 | /* attach function pointers to generated struct's method handlers */ |
3d53b501 |
234 | g_signal_connect(hostnamed_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL); |
235 | g_signal_connect(hostnamed_interf, "handle-set-static-hostname", G_CALLBACK(on_handle_set_static_hostname), NULL); |
236 | g_signal_connect(hostnamed_interf, "handle-set-pretty-hostname", G_CALLBACK(on_handle_set_pretty_hostname), NULL); |
237 | g_signal_connect(hostnamed_interf, "handle-set-chassis", G_CALLBACK(on_handle_set_chassis), NULL); |
238 | g_signal_connect(hostnamed_interf, "handle-set-icon-name", G_CALLBACK(on_handle_set_icon_name), NULL); |
239 | |
76b67a18 |
240 | /* set our properties before export */ |
1be94ede |
241 | hostname1_set_hostname(hostnamed_interf, our_get_hostname()); |
242 | hostname1_set_static_hostname(hostnamed_interf, our_get_static_hostname()); |
243 | hostname1_set_pretty_hostname(hostnamed_interf, our_get_pretty_hostname()); |
244 | hostname1_set_chassis(hostnamed_interf, our_get_chassis()); |
245 | hostname1_set_icon_name(hostnamed_interf, our_get_icon_name()); |
246 | hostname1_set_kernel_name(hostnamed_interf, our_get_kernel_name()); |
247 | hostname1_set_kernel_version(hostnamed_interf, our_get_kernel_version()); |
248 | hostname1_set_kernel_release(hostnamed_interf, our_get_kernel_release()); |
249 | hostname1_set_operating_system_cpename(hostnamed_interf, our_get_os_cpename()); |
250 | hostname1_set_operating_system_pretty_name(hostnamed_interf, our_get_os_pretty_name()); |
76b67a18 |
251 | |
3d53b501 |
252 | if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(hostnamed_interf), |
1be94ede |
253 | conn, |
254 | "/org/freedesktop/hostname1", |
255 | NULL)) { |
3d53b501 |
256 | |
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257 | g_printf("failed to export %s's interface!\n", name); /* unusual edge case, TODO check errno */ |
90f54407 |
258 | hostnamed_mem_clean(); |
3d53b501 |
259 | |
0f339959 |
260 | } else { |
ea207ed3 |
261 | |
90f54407 |
262 | dbus_interface_exported = TRUE; |
263 | g_printf("exported %s's interface on the system bus...\n", name); |
264 | } |
0f339959 |
265 | } |
1e8c7c88 |
266 | |
0f339959 |
267 | static void hostnamed_on_name_acquired(GDBusConnection *conn, |
90f54407 |
268 | const gchar *name, |
0f339959 |
269 | gpointer user_data) { |
270 | |
271 | g_printf("success!\n"); |
1e8c7c88 |
272 | } |
273 | |
5b005882 |
274 | static void hostnamed_on_name_lost(GDBusConnection *conn, |
1be94ede |
275 | const gchar *name, |
276 | gpointer user_data) { |
80043b36 |
277 | |
90f54407 |
278 | if(!conn) { |
0f339959 |
279 | |
90f54407 |
280 | 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); |
281 | hostnamed_mem_clean(); |
282 | } |
0f339959 |
283 | |
509599f0 |
284 | g_printf("lost name %s, exiting...\n", name); |
fd8852d9 |
285 | |
1cd5e6fe |
286 | hostnamed_mem_clean(); |
0f339959 |
287 | } |
288 | |
289 | /* --- end bus/name handlers, begin misc unix functions --- */ |
290 | |
291 | /* safe call to clean and then exit |
509599f0 |
292 | * this stops our GMainLoop safely before letting main() return */ |
0f339959 |
293 | void hostnamed_mem_clean() { |
294 | |
90f54407 |
295 | g_printf("exiting...\n"); |
0f339959 |
296 | |
90f54407 |
297 | if(dbus_interface_exported) |
298 | g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf)); |
0f339959 |
299 | |
90f54407 |
300 | if(g_main_loop_is_running(hostnamed_loop)) |
301 | g_main_loop_quit(hostnamed_loop); |
fd8852d9 |
302 | |
ea207ed3 |
303 | } |
304 | |
0f339959 |
305 | /* wrapper for glib's unix signal handling; called only once if terminatating signal is raised against us */ |
306 | gboolean unix_sig_terminate_handler(gpointer data) { |
c62bceb7 |
307 | |
90f54407 |
308 | g_printf("caught SIGINT/HUP/TERM, exiting\n"); |
0f339959 |
309 | |
90f54407 |
310 | hostnamed_mem_clean(); |
311 | return G_SOURCE_REMOVE; |
0f339959 |
312 | } |
313 | |
314 | void set_signal_handlers() { |
315 | |
90f54407 |
316 | /* we don't care about its descriptor, we never need to unregister these */ |
317 | g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL); |
318 | g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL); |
319 | g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL); |
04cc16f2 |
320 | |
90f54407 |
321 | /* TODO: the "only once" guarantee only counts towards specific signals. |
322 | * make sure calling a SIGINT and SIGHUP doesn't cause term_handler() |
323 | * to be called twice */ |
0f339959 |
324 | } |
325 | |
326 | int main() { |
90f54407 |
327 | |
328 | set_signal_handlers(); |
387173cb |
329 | |
90f54407 |
330 | hostnamed_loop = g_main_loop_new(NULL, TRUE); |
331 | hostnamed_freeable = g_ptr_array_new(); |
fd8852d9 |
332 | |
90f54407 |
333 | bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, |
0f339959 |
334 | "org.freedesktop.hostname1", |
335 | G_BUS_NAME_OWNER_FLAGS_NONE, |
336 | hostnamed_on_bus_acquired, |
337 | hostnamed_on_name_acquired, |
338 | hostnamed_on_name_lost, |
339 | NULL, |
340 | NULL); |
496f5d66 |
341 | |
90f54407 |
342 | g_main_loop_run(hostnamed_loop); |
343 | /* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */ |
344 | g_main_loop_unref(hostnamed_loop); |
1e8c7c88 |
345 | |
90f54407 |
346 | /* guaranteed unownable */ |
347 | g_bus_unown_name(bus_descriptor); |
c62bceb7 |
348 | |
90f54407 |
349 | /* at this point no operations can occur with our data, it is safe to free it + its container */ |
350 | g_ptr_array_free(hostnamed_freeable, TRUE); |
7323a4e4 |
351 | |
90f54407 |
352 | return 0; |
a35a69c5 |
353 | } |
354 | |
f1ad9351 |
355 | gboolean test_against_known_vm_strings(gchar *sysctl_string) { |
356 | |
357 | unsigned int i; |
358 | |
359 | if(is_vm) |
360 | return TRUE; |
361 | |
362 | for(; i < G_N_ELEMENTS(vmstring_list); i++) |
363 | if(strcasestr(sysctl_string, vmstring_list[i])) |
364 | return (is_vm = TRUE) ? TRUE : FALSE; |
365 | |
366 | return FALSE; |
367 | } |
368 | |
a6f11205 |
369 | /* TODO figure out DMI variables on obsd */ |
a35a69c5 |
370 | /*static gchar *guess_icon_name() { |
371 | |
372 | gchar *filebuf = NULL; |
373 | gchar *ret = NULL; |
374 | |
1cd5e6fe |
375 | #if defined(__i386__) || defined(__x86_64__) |
39df6847 |
376 | |
a35a69c5 |
377 | Taken with a few minor changes from systemd's hostnamed.c, |
378 | copyright 2011 Lennart Poettering. |
379 | |
380 | See the SMBIOS Specification 2.7.1 section 7.4.1 for |
381 | details about the values listed here: |
382 | |
383 | http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_2.7.1.pdf |
39df6847 |
384 | |
a35a69c5 |
385 | |
386 | if (g_file_get_contents ("/sys/class/dmi/id/chassis_type", &filebuf, NULL, NULL)) { |
387 | switch (g_ascii_strtoull (filebuf, NULL, 10)) { |
388 | case 0x3: |
389 | case 0x4: |
390 | case 0x5: |
391 | case 0x6: |
392 | case 0x7: |
393 | ret = g_strdup ("computer-desktop"); |
394 | goto out; |
395 | case 0x9: |
396 | case 0xA: |
397 | case 0xE: |
398 | ret = g_strdup ("computer-laptop"); |
399 | goto out; |
400 | case 0x11: |
401 | case 0x17: |
402 | case 0x1C: |
403 | case 0x1D: |
404 | ret = g_strdup ("computer-server"); |
405 | goto out; |
406 | } |
407 | } |
1cd5e6fe |
408 | #endif |
a35a69c5 |
409 | ret = g_strdup ("computer"); |
410 | out: |
411 | g_free (filebuf); |
412 | return ret; |
413 | }*/ |
1e8c7c88 |
414 | |