src/interfaces/hostnamed/hostnamed.c

   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 #include <string.h>
  21
  22 #include <sys/param.h>
  23 #include <sys/sysctl.h>
  24 #include <sys/sensors.h>
  25 #include <sys/ioctl.h>
  26 #include <sys/utsname.h>
  27
  28 #include <machine/apmvar.h>
  29
  30 #include <glib/gprintf.h>
  31 #include <glib-unix.h>
  32 /* #include <gtk/gtk.h> */
  33
  34 #include "hostnamed-gen.h"
  35 #include "hostnamed.h"
  36
  37 /* format: {
  38  *           (1) string to be matched against runtime machine's sysctl output.
  39  *               can be either the exact string or a substring contained
  40  *               within sysctl strings. no "guesses" here, a match should
  41  *               reliably indicate the chassis/icon.
  42  *
  43  *           (2) string describing chassis type divulged by (1).
  44  *               must be one of "desktop", "laptop", "server",
  45  *               "tablet", "handset", "vm", "container" or NULL
  46  *               if only icon string can be ascertained. "vm" refers
  47  *               to operating systems running on baremetal hypervisors
  48  *               (hardware virtualization, like XEN) while "container"
  49  *               refers to OSs running on shared hypervisors like
  50  *               virtualbox or VMware. consider the distinction carefully
  51  *               as common virtualization software like KVM may share
  52  *               characteristics of both "vm" and "container" types.
  53  *
  54  *           (3) string specifying icon to use. follows XDG icon spec.
  55  *               see http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
  56  *               for allowed strings.
  57  *
  58  *           (4) chassis precedence bit. TRUE if (2) is defined and
  59  *               we're certain it is the proper string. FALSE in the
  60  *               circumstance (2) may be the correct string, unless
  61  *               a match with this bit set to TRUE overrides it.
  62  *               if (2) is NULL, this bit is inconsequential.
  63  *
  64  *           (5) icon precedence bit. see previous definition.
  65  *         }                                               */
  66 struct SYSCTL_LOOKUP_TABLE {
  67     gchar    *match_string;
  68     gchar    *chassis;
  69     gchar    *icon;
  70     gboolean chassis_precedence;
  71     gboolean icon_precedence;
  72 };
  73
  74 GPtrArray *hostnamed_freeable;
  75 Hostname1 *hostnamed_interf;
  76
  77 GMainLoop *hostnamed_loop;
  78
  79 guint bus_descriptor;
  80 gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */
  81
  82 gchar *HOSTNAME, *STATIC_HOSTNAME, *PRETTY_HOSTNAME;
  83 gchar *CHASSIS, *ICON;
  84 gchar *KERN_NAME, *KERN_RELEASE, *KERN_VERS, *OS_CPENAME;
  85
  86 /* TODO no specific vm or laptop icon in gnome
  87  * NOTE paravirtualization on xen is only available for linuxes right now
  88  * dmesg on linux systems reveals xen and virtualization method (HVM or PVM)
  89  * but we will worry about those later */
  90
  91 /* add any sysctl strings that suggest virtualization here */
  92 const struct SYSCTL_LOOKUP_TABLE chassis_indicator_table[] =
  93 {
  94     { "QEMU Virtual CPU",        "vm",        NULL,              FALSE, FALSE }, /* could be QEMU running in userspace or as part of KVM */
  95     { "KVM",                     "vm",        "drive-multidisk", FALSE, FALSE },
  96     { "SmartDC HVM",             "vm",        "drive-multidisk", TRUE,  TRUE  }, /* illumos-joyent kvm */
  97     { "VirtualBox",              "vm",        "drive-multidisk", TRUE,  TRUE  },
  98     { "VMware, Inc.",            "vm",        "drive-multidisk", TRUE,  TRUE  },
  99     { "VMware Virtual Platform", "vm",        "drive-multidisk", TRUE,  TRUE  },
 100     { "Parallels",               "vm",        "drive-multidisk", TRUE,  TRUE  }, /* need verification */
 101     { "Xen",                     "vm",        "drive-multidisk", FALSE, FALSE }
 102 }; /* TODO: chroots, etc. are the actual "containers", add them */
 103
 104 /* archs to check against when determining if machine is server */
 105 const gchar *server_archs[] = {
 106     "hppa",
 107     "sparc",
 108     "sparc64"
 109 };
 110
 111 /* --- begin method/property/dbus signal code --- */
 112
 113 /* TODO the extra boolean passed to these funcs is for policykit auth */
 114 /* TODO complete call with error, message, etc */
 115 static gboolean
 116 on_handle_set_hostname(Hostname1 *hn1_passed_interf,
 117                        GDBusMethodInvocation *invoc,
 118                        const gchar *greet,
 119                        gpointer data) {
 120     GVariant *params;
 121     gchar *proposed_hostname, *valid_hostname_buf;
 122     gboolean policykit_auth, ret;
 123     size_t check_length, bad_length;
 124
 125     bad_length = MAXHOSTNAMELEN + 1;
 126     proposed_hostname = NULL;
 127     ret = FALSE;
 128
 129     params = g_dbus_method_invocation_get_parameters(invoc);
 130     g_variant_get(params, "(sb)", &proposed_hostname, &policykit_auth);
 131
 132     if(proposed_hostname && (valid_hostname_buf = g_hostname_to_ascii(proposed_hostname))) {
 133
 134         check_length = strnlen(proposed_hostname, bad_length);
 135
 136         if(check_length < bad_length && !sethostname(proposed_hostname, check_length))
 137             ret = TRUE;
 138     }
 139
 140     hostname1_complete_set_hostname(hn1_passed_interf, invoc);
 141
 142     if(proposed_hostname)
 143         g_free(proposed_hostname);
 144     if(valid_hostname_buf)
 145         g_free(valid_hostname_buf);
 146
 147     return ret;
 148 }
 149
 150 static gboolean
 151 on_handle_set_static_hostname(Hostname1 *hn1_passed_interf,
 152                               GDBusMethodInvocation *invoc,
 153                               const gchar *greet,
 154                               gpointer data) {
 155     return FALSE;
 156 }
 157
 158 static gboolean
 159 on_handle_set_pretty_hostname(Hostname1 *hn1_passed_interf,
 160                               GDBusMethodInvocation *invoc,
 161                               const gchar *greet,
 162                               gpointer data) {
 163     return FALSE;
 164 }
 165
 166 static gboolean
 167 on_handle_set_chassis(Hostname1 *hn1_passed_interf,
 168                       GDBusMethodInvocation *invoc,
 169                       const gchar *greet,
 170                       gpointer data) {
 171     return FALSE;
 172 }
 173
 174 static gboolean
 175 on_handle_set_icon_name(Hostname1 *hn1_passed_interf,
 176                         GDBusMethodInvocation *invoc,
 177                         const gchar *greet,
 178                         gpointer data) {
 179     return FALSE;
 180 }
 181
 182 /* note: all hostnamed/hostname1's properties are read-only,
 183  * and do not need set_ functions, gdbus-codegen realized
 184  * this from the XML and handled the to-be error of trying
 185  * to set a read-only property's value
 186  */
 187
 188 const gchar *
 189 our_get_hostname() {
 190
 191     /*gchar *hostname_buf, *ret;
 192     size_t hostname_divider;
 193
 194     hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN);
 195     ret          = (gchar*) g_malloc0(MAXHOSTNAMELEN);
 196
 197     g_ptr_array_add(hostnamed_freeable, hostname_buf);
 198     g_ptr_array_add(hostnamed_freeable, ret);
 199
 200     if(gethostname(hostname_buf, MAXHOSTNAMELEN) || g_strcmp0(hostname_buf, "") == 0)
 201         return "localhost";
 202
 203     hostname_divider = strcspn(hostname_buf, ".");
 204
 205     return strncpy(ret, hostname_buf, hostname_divider);*/
 206
 207     if(HOSTNAME)
 208         return HOSTNAME;
 209
 210     return "localhost";
 211 }
 212
 213 const gchar *
 214 our_get_static_hostname() {
 215
 216     /*const gchar *pretty_hostname;
 217     const gchar *ret;
 218
 219     pretty_hostname = our_get_pretty_hostname();
 220
 221     if(g_strcmp0(pretty_hostname, "") == 0)
 222         ret = our_get_hostname();
 223
 224     else if((ret = g_hostname_to_ascii(pretty_hostname))) {
 225
 226         g_ptr_array_add(hostnamed_freeable, (gpointer)ret);
 227         return ret;
 228     }
 229
 230     return ret;*/
 231
 232     if(STATIC_HOSTNAME)
 233         return STATIC_HOSTNAME;
 234     else if(HOSTNAME)
 235         return HOSTNAME;
 236
 237     return "localhost";
 238 }
 239
 240 const gchar *
 241 our_get_pretty_hostname() {
 242
 243   /*GKeyFile *config;
 244     gchar *ret;
 245
 246     config = g_key_file_new();
 247
 248     if(g_key_file_load_from_file(config, "/etc/systemd_compat.conf", G_KEY_FILE_NONE, NULL)
 249         && (ret = g_key_file_get_value(config, "hostnamed", "PrettyHostname", NULL))) {  ret might need to be freed, docs dont specify but i am suspicious
 250
 251         g_key_file_unref(config);
 252         return ret;
 253     }
 254
 255     if(config)
 256         g_free(config);
 257
 258     return "";*/
 259
 260     if(PRETTY_HOSTNAME)
 261         return PRETTY_HOSTNAME;
 262
 263     return "";
 264 }
 265
 266 const gchar *
 267 our_get_chassis() {
 268
 269    if(CHASSIS)
 270         return CHASSIS;
 271
 272     return "desktop"; /* this leads to the most generic beheivor in the unlikely case its returned */
 273 }
 274
 275 const gchar *
 276 our_get_icon_name() {
 277
 278     if(ICON)
 279         return ICON;
 280
 281     return "";
 282 }
 283
 284 const gchar *
 285 our_get_kernel_name() {
 286
 287     if(KERN_NAME)
 288         return KERN_NAME;
 289
 290     return "";
 291 }
 292
 293 const gchar *
 294 our_get_kernel_version() {
 295
 296     if(KERN_VERS)
 297         return KERN_VERS;
 298
 299     return "";
 300 }
 301
 302 const gchar *
 303 our_get_kernel_release() {
 304
 305     if(KERN_RELEASE)
 306         return KERN_RELEASE;
 307
 308     return "";
 309 }
 310
 311 const gchar *
 312 our_get_os_cpename() {
 313
 314     return "ONEDAY";
 315 }
 316
 317 const gchar *
 318 our_get_os_pretty_name() {
 319
 320     return "OpenBSD";
 321 }
 322
 323 /* --- end method/property/dbus signal code, begin bus/name handlers --- */
 324
 325 static void hostnamed_on_bus_acquired(GDBusConnection *conn,
 326                             const gchar *name,
 327                             gpointer user_data) {
 328
 329     g_printf("got bus/name, exporting %s's interface...\n", name);
 330
 331     hostnamed_interf = hostname1_skeleton_new();
 332
 333     /* attach function pointers to generated struct's method handlers */
 334     g_signal_connect(hostnamed_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL);
 335     g_signal_connect(hostnamed_interf, "handle-set-static-hostname", G_CALLBACK(on_handle_set_static_hostname), NULL);
 336     g_signal_connect(hostnamed_interf, "handle-set-pretty-hostname", G_CALLBACK(on_handle_set_pretty_hostname), NULL);
 337     g_signal_connect(hostnamed_interf, "handle-set-chassis", G_CALLBACK(on_handle_set_chassis), NULL);
 338     g_signal_connect(hostnamed_interf, "handle-set-icon-name", G_CALLBACK(on_handle_set_icon_name), NULL);
 339
 340     /* set our properties before export */
 341     hostname1_set_hostname(hostnamed_interf, our_get_hostname());
 342     hostname1_set_static_hostname(hostnamed_interf, our_get_static_hostname());
 343     hostname1_set_pretty_hostname(hostnamed_interf, our_get_pretty_hostname());
 344     hostname1_set_chassis(hostnamed_interf, our_get_chassis());
 345     hostname1_set_icon_name(hostnamed_interf, our_get_icon_name());
 346     hostname1_set_kernel_name(hostnamed_interf, our_get_kernel_name());
 347     hostname1_set_kernel_version(hostnamed_interf, our_get_kernel_version());
 348     hostname1_set_kernel_release(hostnamed_interf, our_get_kernel_release());
 349     hostname1_set_operating_system_cpename(hostnamed_interf, our_get_os_cpename());
 350     hostname1_set_operating_system_pretty_name(hostnamed_interf, our_get_os_pretty_name());
 351
 352     if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(hostnamed_interf),
 353                                          conn,
 354                                          "/org/freedesktop/hostname1",
 355                                          NULL)) {
 356
 357         g_printf("failed to export %s's interface!\n", name); /* unusual edge case, TODO check errno */
 358         hostnamed_mem_clean();
 359
 360     } else {
 361
 362         dbus_interface_exported = TRUE;
 363         g_printf("exported %s's interface on the system bus...\n", name);
 364     }
 365 }
 366
 367 static void hostnamed_on_name_acquired(GDBusConnection *conn,
 368                                        const gchar *name,
 369                                        gpointer user_data) {
 370
 371     g_printf("success!\n");
 372 }
 373
 374 static void hostnamed_on_name_lost(GDBusConnection *conn,
 375                                    const gchar *name,
 376                                    gpointer user_data) {
 377
 378     if(!conn) {
 379
 380         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);
 381         hostnamed_mem_clean();
 382     }
 383
 384     g_printf("lost name %s, exiting...\n", name);
 385
 386     hostnamed_mem_clean();
 387 }
 388
 389 /* --- end bus/name handlers, begin misc unix functions --- */
 390
 391 /* safe call to clean and then exit
 392  * this stops our GMainLoop safely before letting main() return */
 393 void hostnamed_mem_clean() {
 394
 395     g_printf("exiting...\n");
 396
 397     if(dbus_interface_exported)
 398         g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf));
 399
 400     if(g_main_loop_is_running(hostnamed_loop))
 401         g_main_loop_quit(hostnamed_loop);
 402
 403 }
 404
 405 /* wrapper for glib's unix signal handling; called only once if terminatating signal is raised against us */
 406 gboolean unix_sig_terminate_handler(gpointer data) {
 407
 408     g_printf("caught SIGINT/HUP/TERM, exiting\n");
 409
 410     hostnamed_mem_clean();
 411     return G_SOURCE_REMOVE;
 412 }
 413
 414 void set_signal_handlers() {
 415
 416     /* we don't care about its descriptor, we never need to unregister these */
 417     g_unix_signal_add(SIGINT,  unix_sig_terminate_handler, NULL);
 418     g_unix_signal_add(SIGHUP,  unix_sig_terminate_handler, NULL);
 419     g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL);
 420
 421     /* TODO: the "only once" guarantee only counts towards specific signals.
 422      *       make sure calling a SIGINT and SIGHUP doesn't cause term_handler()
 423      *       to be called twice */
 424 }
 425
 426 int main() {
 427
 428     hostnamed_freeable = g_ptr_array_new();
 429
 430     /* TODO: check for valid, writable config at init. if no, complain to `make install` */
 431
 432     CHASSIS = ICON = OS_CPENAME = 0;
 433     KERN_NAME = KERN_RELEASE = KERN_VERS = 0;
 434
 435     set_signal_handlers();
 436
 437     if(!determine_chassis_and_icon() || !set_uname_properties())
 438         return 1;
 439
 440     hostnamed_loop     = g_main_loop_new(NULL, TRUE);
 441
 442     bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
 443                                    "org.freedesktop.hostname1",
 444                                    G_BUS_NAME_OWNER_FLAGS_NONE,
 445                                    hostnamed_on_bus_acquired,
 446                                    hostnamed_on_name_acquired,
 447                                    hostnamed_on_name_lost,
 448                                    NULL,
 449                                    NULL);
 450
 451     g_main_loop_run(hostnamed_loop);
 452     /* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */
 453     g_main_loop_unref(hostnamed_loop);
 454
 455     /* guaranteed unownable */
 456     g_bus_unown_name(bus_descriptor);
 457
 458     /* at this point no operations can occur with our data, it is safe to free it + its container */
 459     g_ptr_array_free(hostnamed_freeable, TRUE);
 460
 461     return 0;
 462 }
 463
 464 gboolean set_uname_properties() {
 465
 466     struct utsname un;
 467
 468     if(-1 == uname(&un))
 469         return FALSE;
 470
 471     KERN_NAME = (gchar*)g_malloc0(sizeof(un.sysname));
 472     g_ptr_array_add(hostnamed_freeable, KERN_NAME);
 473     g_strlcpy(KERN_NAME, un.sysname, sizeof(un.sysname));
 474
 475     KERN_RELEASE = (gchar*)g_malloc0(sizeof(un.release));
 476     g_ptr_array_add(hostnamed_freeable, KERN_RELEASE);
 477     g_strlcpy(KERN_RELEASE, un.release, sizeof(un.release));
 478
 479     KERN_VERS = (gchar*)g_malloc0(sizeof(un.version));
 480     g_ptr_array_add(hostnamed_freeable, KERN_VERS);
 481     g_strlcpy(KERN_VERS, un.version, sizeof(un.version));
 482
 483     return TRUE;
 484 }
 485
 486 gboolean determine_chassis_and_icon() {
 487
 488     const size_t bufsize = 4096;
 489
 490     char *hwproduct, *hwmodel, *hwvendor, *hwmachine;
 491     size_t hwproduct_size, hwmodel_size, hwvendor_size, hwmachine_size;
 492     int hwproduct_name[2], hwmodel_name[2], hwvendor_name[2], hwmachine_name[2];
 493     unsigned int i;
 494     gboolean UNSURE_CHASSIS_FLAG, UNSURE_ICON_FLAG;
 495
 496     hwproduct_size = hwmodel_size = hwvendor_size = hwmachine_size = bufsize;
 497     UNSURE_CHASSIS_FLAG = UNSURE_ICON_FLAG = FALSE;
 498     i = 0;
 499
 500     hwproduct = (char*)g_malloc0(4096);
 501     hwmodel   = (char*)g_malloc0(4096);
 502     hwvendor  = (char*)g_malloc0(4096);
 503     hwmachine = (char*)g_malloc0(4096);
 504
 505     g_ptr_array_add(hostnamed_freeable, hwproduct);
 506     g_ptr_array_add(hostnamed_freeable, hwmodel);
 507     g_ptr_array_add(hostnamed_freeable, hwvendor);
 508     g_ptr_array_add(hostnamed_freeable, hwmachine);
 509
 510     hwproduct_name[0] = CTL_HW;
 511     hwproduct_name[1] = HW_PRODUCT;
 512
 513     hwmodel_name[0] = CTL_HW;
 514     hwmodel_name[1] = HW_MODEL;
 515
 516     hwvendor_name[0] = CTL_HW;
 517     hwvendor_name[1] = HW_VENDOR;
 518
 519     hwmachine_name[0] = CTL_HW;
 520     hwmachine_name[1] = HW_MACHINE;
 521
 522     /* pass NULL buffer to check size first, then pass hw to be filled according to freshly-set hw_size */
 523     if(-1 == sysctl(hwproduct_name, 2, NULL, &hwproduct_size, NULL, 0) || -1 == sysctl(hwproduct_name, 2, hwproduct, &hwproduct_size, NULL, 0))
 524         return FALSE;
 525
 526     if(-1 == sysctl(hwmodel_name, 2, NULL, &hwmodel_size, NULL, 0) || -1 == sysctl(hwmodel_name, 2, hwmodel, &hwmodel_size, NULL, 0))
 527         return FALSE;
 528
 529     if(-1 == sysctl(hwvendor_name, 2, NULL, &hwvendor_size, NULL, 0) || -1 == sysctl(hwvendor_name, 2, hwvendor, &hwvendor_size, NULL, 0))
 530         return FALSE;
 531
 532     if(-1 == sysctl(hwmachine_name, 2, NULL, &hwmachine_size, NULL, 0) || -1 == sysctl(hwmachine_name, 2, hwmachine, &hwmachine_size, NULL, 0))
 533         return FALSE;
 534
 535     /* TODO: test for laptop, if not, dmidecode for desktop vs. server
 536      *       probably move this code to vm test func and set a global after running it early, once */
 537
 538     for(; i < G_N_ELEMENTS(chassis_indicator_table); i++) {
 539         if(strcasestr(hwproduct,    chassis_indicator_table[i].match_string)
 540             || strcasestr(hwmodel,  chassis_indicator_table[i].match_string)
 541             || strcasestr(hwvendor, chassis_indicator_table[i].match_string)) {
 542
 543             if(!UNSURE_CHASSIS_FLAG && chassis_indicator_table[i].chassis) {
 544
 545                 UNSURE_CHASSIS_FLAG = chassis_indicator_table[i].chassis_precedence;
 546                 CHASSIS = chassis_indicator_table[i].chassis;
 547             }
 548
 549             if(!UNSURE_ICON_FLAG && chassis_indicator_table[i].icon) {
 550
 551                 UNSURE_ICON_FLAG = chassis_indicator_table[i].icon_precedence;
 552                 ICON = chassis_indicator_table[i].icon;
 553             }
 554         }
 555     }
 556
 557     if(up_native_is_laptop()) {
 558
 559         if(!CHASSIS)
 560             CHASSIS = "laptop";
 561         if(!ICON)
 562             ICON = "input-touchpad"; /* TODO pull an icon package that actually has the icons we're looking for */
 563
 564     } else if(is_server(hwmachine)) {
 565
 566         if(!CHASSIS)
 567             CHASSIS = "server";
 568         if(!ICON)
 569             ICON = "uninterruptible-power-supply";
 570
 571     } else if(!CHASSIS || !ICON) {
 572
 573         if(!CHASSIS)
 574             CHASSIS = "desktop";
 575         if(!ICON)
 576             ICON = "computer";
 577     }
 578
 579     return (CHASSIS && ICON);
 580 }
 581
 582 gboolean is_server(gchar *arch) {
 583
 584     unsigned int i;
 585
 586     for(; i < G_N_ELEMENTS(server_archs); i++)
 587         if(strcasestr(arch, server_archs[i]))
 588             return TRUE;
 589
 590     return FALSE;
 591 }
 592
 593 gboolean up_native_is_laptop() {
 594
 595     struct apm_power_info bstate;
 596     struct sensordev acpiac;
 597
 598     if (up_native_get_sensordev("acpiac0", &acpiac))
 599         return TRUE;
 600
 601     if (-1 == ioctl(up_apm_get_fd(), APM_IOC_GETPOWER, &bstate))
 602         g_error("ioctl on apm fd failed : %s", g_strerror(errno));
 603
 604     return bstate.ac_state != APM_AC_UNKNOWN;
 605 }
 606
 607 int up_apm_get_fd() {
 608
 609     static int apm_fd = 0;
 610
 611     if(apm_fd == 0) {
 612
 613         g_debug("apm_fd is not initialized yet, opening");
 614
 615         /* open /dev/apm */
 616         if((apm_fd = open("/dev/apm", O_RDONLY)) == -1) {
 617             if(errno != ENXIO && errno != ENOENT)
 618                 g_error("cannot open device file");
 619         }
 620     }
 621
 622     return apm_fd;
 623 }
 624
 625 gboolean up_native_get_sensordev(const char * id, struct sensordev * snsrdev) {
 626
 627     int devn;
 628     size_t sdlen = sizeof(struct sensordev);
 629     int mib[] = {CTL_HW, HW_SENSORS, 0, 0 ,0};
 630
 631     for (devn = 0 ; ; devn++) {
 632         mib[2] = devn;
 633         if(sysctl(mib, 3, snsrdev, &sdlen, NULL, 0) == -1) {
 634             if(errno == ENXIO)
 635                 continue;
 636             if(errno == ENOENT)
 637                 break;
 638         }
 639
 640         if (!strcmp(snsrdev->xname, id))
 641             return TRUE;
 642     }
 643
 644     return FALSE;
 645 }