166
171
/* Function to use when printing errors */
167
172
void perror_plus(const char *print_text){
168
174
fprintf(stderr, "Mandos plugin %s: ",
169
175
program_invocation_short_name);
170
177
perror(print_text);
180
__attribute__((format (gnu_printf, 2, 3)))
181
int fprintf_plus(FILE *stream, const char *format, ...){
183
va_start (ap, format);
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
174
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
192
* bytes. "buffer_capacity" is how much is currently allocated,
176
193
* "buffer_length" is how much is already used.
178
195
size_t incbuffer(char **buffer, size_t buffer_length,
179
size_t buffer_capacity){
196
size_t buffer_capacity){
180
197
if(buffer_length + BUFFER_SIZE > buffer_capacity){
181
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
182
199
if(buffer == NULL){
187
204
return buffer_capacity;
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
207
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
194
211
server *new_server = malloc(sizeof(server));
195
212
if(new_server == NULL){
196
213
perror_plus("malloc");
199
216
*new_server = (server){ .ip = strdup(ip),
201
.if_index = if_index,
218
.if_index = if_index,
203
220
if(new_server->ip == NULL){
204
221
perror_plus("strdup");
207
/* unique case of first server */
224
/* Special case of first server */
208
225
if (mc.current_server == NULL){
209
226
new_server->next = new_server;
210
227
new_server->prev = new_server;
211
228
mc.current_server = new_server;
212
/* Placing the new server last in the list */
229
/* Place the new server last in the list */
214
231
new_server->next = mc.current_server;
215
232
new_server->prev = mc.current_server->prev;
250
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
251
268
if(rc != GPG_ERR_NO_ERROR){
252
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
253
gpgme_strsource(rc), gpgme_strerror(rc));
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
257
274
rc = gpgme_op_import(mc.ctx, pgp_data);
258
275
if(rc != GPG_ERR_NO_ERROR){
259
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
260
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
273
fprintf(stderr, "Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
277
294
gpgme_check_version(NULL);
278
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
279
296
if(rc != GPG_ERR_NO_ERROR){
280
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
285
/* Set GPGME home directory for the OpenPGP engine only */
302
/* Set GPGME home directory for the OpenPGP engine only */
286
303
rc = gpgme_get_engine_info(&engine_info);
287
304
if(rc != GPG_ERR_NO_ERROR){
288
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
292
309
while(engine_info != NULL){
331
350
ssize_t plaintext_length = 0;
334
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
337
356
/* Create new GPGME data buffer from memory cryptotext */
338
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
340
359
if(rc != GPG_ERR_NO_ERROR){
341
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
342
gpgme_strsource(rc), gpgme_strerror(rc));
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
346
365
/* Create new empty GPGME data buffer for the plaintext */
347
366
rc = gpgme_data_new(&dh_plain);
348
367
if(rc != GPG_ERR_NO_ERROR){
349
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
350
gpgme_strsource(rc), gpgme_strerror(rc));
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
351
371
gpgme_data_release(dh_crypto);
357
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
358
378
if(rc != GPG_ERR_NO_ERROR){
359
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
361
381
plaintext_length = -1;
363
383
gpgme_decrypt_result_t result;
364
384
result = gpgme_op_decrypt_result(mc.ctx);
365
385
if(result == NULL){
366
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
368
fprintf(stderr, "Unsupported algorithm: %s\n",
369
result->unsupported_algorithm);
370
fprintf(stderr, "Wrong key usage: %u\n",
371
result->wrong_key_usage);
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
372
392
if(result->file_name != NULL){
373
fprintf(stderr, "File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
375
395
gpgme_recipient_t recipient;
376
396
recipient = result->recipients;
377
397
while(recipient != NULL){
378
fprintf(stderr, "Public key algorithm: %s\n",
379
gpgme_pubkey_algo_name(recipient->pubkey_algo));
380
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
381
fprintf(stderr, "Secret key available: %s\n",
382
recipient->status == GPG_ERR_NO_SECKEY
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
384
405
recipient = recipient->next;
483
504
/* OpenPGP credentials */
484
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
485
506
if(ret != GNUTLS_E_SUCCESS){
486
fprintf(stderr, "GnuTLS memory error: %s\n",
487
safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
488
509
gnutls_global_deinit();
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
498
520
ret = gnutls_certificate_set_openpgp_key_file
499
521
(mc.cred, pubkeyfilename, seckeyfilename,
500
522
GNUTLS_OPENPGP_FMT_BASE64);
501
523
if(ret != GNUTLS_E_SUCCESS){
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
510
532
/* GnuTLS server initialization */
511
533
ret = gnutls_dh_params_init(&mc.dh_params);
512
534
if(ret != GNUTLS_E_SUCCESS){
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
514
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
517
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
518
541
if(ret != GNUTLS_E_SUCCESS){
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
520
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
708
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
709
733
perror_plus("if_indextoname");
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
715
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
718
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
719
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
999
1024
char ip[AVAHI_ADDRESS_STR_MAX];
1000
1025
avahi_address_snprint(ip, sizeof(ip), address);
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1004
ip, (intmax_t)interface, port);
1027
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1028
PRIdMAX ") on port %" PRIu16 "\n", name,
1029
host_name, ip, (intmax_t)interface, port);
1006
1031
int ret = start_mandos_communication(ip, port, interface,
1007
1032
avahi_proto_to_af(proto));
1009
1034
avahi_simple_poll_quit(mc.simple_poll);
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1084
1114
errno = old_errno;
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1092
int good_interface(const struct dirent *if_entry){
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1101
perror_plus("asprintf");
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
perror_plus("open");
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1125
perror_plus("read");
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1117
bool get_flags(const char *ifname, struct ifreq *ifr){
1120
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1122
perror_plus("socket");
1125
strcpy(ifr->ifr_name, ifname);
1126
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1129
perror_plus("ioctl SIOCGIFFLAGS");
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1136
bool good_flags(const char *ifname, const struct ifreq *ifr){
1152
1138
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1160
1146
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1168
1154
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1176
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1163
if(ifr->ifr_flags & IFF_NOARP){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1184
1171
/* Accept this device */
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1179
* This function determines if a directory entry in /sys/class/net
1180
* corresponds to an acceptable network device.
1181
* (This function is passed to scandir(3) as a filter function.)
1183
int good_interface(const struct dirent *if_entry){
1184
if(if_entry->d_name[0] == '.'){
1189
if(not get_flags(if_entry->d_name, &ifr)){
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1197
if(not good_flags(if_entry->d_name, &ifr)){
1204
* This function determines if a directory entry in /sys/class/net
1205
* corresponds to an acceptable network device which is up.
1206
* (This function is passed to scandir(3) as a filter function.)
1208
int up_interface(const struct dirent *if_entry){
1209
if(if_entry->d_name[0] == '.'){
1214
if(not get_flags(if_entry->d_name, &ifr)){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1222
/* Reject down interfaces */
1223
if(not (ifr.ifr_flags & IFF_UP)){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1231
/* Reject non-running interfaces */
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1240
if(not good_flags(if_entry->d_name, &ifr)){
1257
/* Is this directory entry a runnable program? */
1258
int runnable_hook(const struct dirent *direntry){
1263
if((direntry->d_name)[0] == '\0'){
1268
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1269
"abcdefghijklmnopqrstuvwxyz"
1272
if((direntry->d_name)[sret] != '\0'){
1273
/* Contains non-allowed characters */
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1281
char *fullname = NULL;
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1284
perror_plus("asprintf");
1288
ret = stat(fullname, &st);
1291
perror_plus("Could not stat hook");
1295
if(not (S_ISREG(st.st_mode))){
1296
/* Not a regular file */
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1304
/* Not executable */
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1203
1318
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
1320
struct timespec now;
1206
1321
struct timespec waited_time;
1207
1322
intmax_t block_time;
1210
1325
if(mc.current_server == NULL){
1213
"Wait until first server is found. No timeout!\n");
1327
fprintf_plus(stderr, "Wait until first server is found."
1215
1330
ret = avahi_simple_poll_iterate(s, -1);
1218
fprintf(stderr, "Check current_server if we should run it,"
1333
fprintf_plus(stderr, "Check current_server if we should run"
1221
1336
/* the current time */
1222
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1264
1380
ret = avahi_simple_poll_iterate(s, (int)block_time);
1267
if (ret > 0 or errno != EINTR) {
1383
if (ret > 0 or errno != EINTR){
1268
1384
return (ret != 1) ? ret : 0;
1390
bool run_network_hooks(const char *mode, const char *interface,
1392
struct dirent **direntries;
1393
struct dirent *direntry;
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1398
perror_plus("scandir");
1400
int devnull = open("/dev/null", O_RDONLY);
1401
for(int i = 0; i < numhooks; i++){
1402
direntry = direntries[i];
1403
char *fullname = NULL;
1404
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1406
perror_plus("asprintf");
1410
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1413
pid_t hook_pid = fork();
1416
/* Raise privileges */
1420
perror_plus("seteuid");
1422
/* Raise privileges even more */
1426
perror_plus("setuid");
1432
perror_plus("setgid");
1434
/* Reset supplementary groups */
1436
ret = setgroups(0, NULL);
1438
perror_plus("setgroups");
1440
dup2(devnull, STDIN_FILENO);
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1443
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1445
perror_plus("setenv");
1448
ret = setenv("DEVICE", interface, 1);
1450
perror_plus("setenv");
1453
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1455
perror_plus("setenv");
1458
ret = setenv("MODE", mode, 1);
1460
perror_plus("setenv");
1464
ret = asprintf(&delaystring, "%f", delay);
1466
perror_plus("asprintf");
1469
ret = setenv("DELAY", delaystring, 1);
1472
perror_plus("setenv");
1476
if(connect_to != NULL){
1477
ret = setenv("CONNECT", connect_to);
1479
perror_plus("setenv");
1483
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1484
perror_plus("execl");
1485
_exit(EXIT_FAILURE);
1489
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1490
perror_plus("waitpid");
1494
if(WIFEXITED(status)){
1495
if(WEXITSTATUS(status) != 0){
1496
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1497
" with status %d\n", direntry->d_name,
1498
WEXITSTATUS(status));
1502
} else if(WIFSIGNALED(status)){
1503
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1504
" signal %d\n", direntry->d_name,
1509
fprintf_plus(stderr, "Warning: network hook \"%s\""
1510
" crashed\n", direntry->d_name);
1517
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1274
1526
int main(int argc, char *argv[]){
1275
1527
AvahiSServiceBrowser *sb = NULL;
1460
1720
/* Work around Debian bug #633582:
1461
1721
<http://bugs.debian.org/633582> */
1464
1723
/* Re-raise priviliges */
1466
1725
ret = seteuid(0);
1468
1727
perror_plus("seteuid");
1471
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1472
if(seckey_fd == -1){
1473
perror_plus("open");
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1477
perror_plus("fstat");
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(seckey_fd, uid, gid);
1482
perror_plus("fchown");
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1489
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1490
if(pubkey_fd == -1){
1491
perror_plus("open");
1493
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1495
perror_plus("fstat");
1497
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1498
ret = fchown(pubkey_fd, uid, gid);
1500
perror_plus("fchown");
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1507
/* Lower privileges */
1511
perror_plus("seteuid");
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1732
int seckey_fd = open(seckey, O_RDONLY);
1733
if(seckey_fd == -1){
1734
perror_plus("open");
1736
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1738
perror_plus("fstat");
1740
if(S_ISREG(st.st_mode)
1741
and st.st_uid == 0 and st.st_gid == 0){
1742
ret = fchown(seckey_fd, uid, gid);
1744
perror_plus("fchown");
1748
TEMP_FAILURE_RETRY(close(seckey_fd));
1752
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1753
int pubkey_fd = open(pubkey, O_RDONLY);
1754
if(pubkey_fd == -1){
1755
perror_plus("open");
1757
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1759
perror_plus("fstat");
1761
if(S_ISREG(st.st_mode)
1762
and st.st_uid == 0 and st.st_gid == 0){
1763
ret = fchown(pubkey_fd, uid, gid);
1765
perror_plus("fchown");
1769
TEMP_FAILURE_RETRY(close(pubkey_fd));
1773
/* Lower privileges */
1777
perror_plus("seteuid");
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1516
1788
avahi_set_log_function(empty_log);
1519
1791
if(interface[0] == '\0'){
1520
1792
struct dirent **direntries;
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1797
/* No up interfaces, look for any good interfaces */
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1524
/* Pick the first good interface */
1803
/* Pick the first interface returned */
1525
1804
interface = strdup(direntries[0]->d_name);
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1529
1808
if(interface == NULL){
1530
1809
perror_plus("malloc");