To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 712
- compare with another revision
- download diff
- download tarball
- view history from revision 712
- Committer: Teddy Hogeborn
- Date: 2014-07-14 10:03:10 UTC
- Revision ID: teddy@recompile.se-20140714100310-omqvn3mujflspggi
mandos.lsm: Fix white space.
- files added:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
180
185
perror(print_text);
181
186
}
182
187
183
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
189
int fprintf_plus(FILE *stream, const char *format, ...){
185
190
va_list ap;
186
191
va_start (ap, format);
187
192
188
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
194
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
196
}
192
197
193
198
/*
195
200
* bytes. "buffer_capacity" is how much is currently allocated,
196
201
* "buffer_length" is how much is already used.
197
202
*/
203
__attribute__((nonnull, warn_unused_result))
198
204
size_t incbuffer(char **buffer, size_t buffer_length,
199
205
size_t buffer_capacity){
200
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
203
213
return 0;
204
214
}
215
*buffer = new_buf;
205
216
buffer_capacity += BUFFER_SIZE;
206
217
}
207
218
return buffer_capacity;
208
219
}
209
220
210
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
211
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
224
int af, server **current_server){
213
225
int ret;
222
234
.af = af };
223
235
if(new_server->ip == NULL){
224
236
perror_plus("strdup");
237
free(new_server);
238
return false;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
if(ret == -1){
242
perror_plus("clock_gettime");
243
free(new_server->ip);
244
free(new_server);
225
245
return false;
226
246
}
227
247
/* Special case of first server */
229
249
new_server->next = new_server;
230
250
new_server->prev = new_server;
231
251
*current_server = new_server;
232
/* Place the new server last in the list */
233
252
} else {
253
/* Place the new server last in the list */
234
254
new_server->next = *current_server;
235
255
new_server->prev = (*current_server)->prev;
236
256
new_server->prev->next = new_server;
237
257
(*current_server)->prev = new_server;
238
258
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
259
return true;
245
260
}
246
261
247
262
/*
248
263
* Initialize GPGME.
249
264
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
265
__attribute__((nonnull, warn_unused_result))
266
static bool init_gpgme(const char * const seckey,
267
const char * const pubkey,
268
const char * const tempdir,
269
mandos_context *mc){
252
270
gpgme_error_t rc;
253
271
gpgme_engine_info_t engine_info;
254
272
255
273
/*
256
274
* Helper function to insert pub and seckey to the engine keyring.
257
275
*/
258
bool import_key(const char *filename){
276
bool import_key(const char * const filename){
259
277
int ret;
260
278
int fd;
261
279
gpgme_data_t pgp_data;
342
360
* Decrypt OpenPGP data.
343
361
* Returns -1 on error
344
362
*/
363
__attribute__((nonnull, warn_unused_result))
345
364
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
365
size_t crypto_size,
347
366
char **plaintext,
467
486
return plaintext_length;
468
487
}
469
488
470
static const char * safer_gnutls_strerror(int value){
489
__attribute__((warn_unused_result))
490
static const char *safer_gnutls_strerror(int value){
471
491
const char *ret = gnutls_strerror(value);
472
492
if(ret == NULL)
473
493
ret = "(unknown)";
475
495
}
476
496
477
497
/* GnuTLS log function callback */
498
__attribute__((nonnull))
478
499
static void debuggnutls(__attribute__((unused)) int level,
479
500
const char* string){
480
501
fprintf_plus(stderr, "GnuTLS: %s", string);
481
502
}
482
503
504
__attribute__((nonnull, warn_unused_result))
483
505
static int init_gnutls_global(const char *pubkeyfilename,
484
506
const char *seckeyfilename,
485
507
mandos_context *mc){
559
581
return -1;
560
582
}
561
583
584
__attribute__((nonnull, warn_unused_result))
562
585
static int init_gnutls_session(gnutls_session_t *session,
563
586
mandos_context *mc){
564
587
int ret;
621
644
__attribute__((unused)) const char *txt){}
622
645
623
646
/* Called when a Mandos server is found */
647
__attribute__((nonnull, warn_unused_result))
624
648
static int start_mandos_communication(const char *ip, in_port_t port,
625
649
AvahiIfIndex if_index,
626
650
int af, mandos_context *mc){
627
651
int ret, tcp_sd = -1;
628
652
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
653
struct sockaddr_storage to;
633
654
char *buffer = NULL;
634
655
char *decrypted_buffer = NULL;
635
656
size_t buffer_length = 0;
716
737
717
738
memset(&to, 0, sizeof(to));
718
739
if(af == AF_INET6){
719
to.in6.sin6_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in6.sin6_addr);
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
721
742
} else { /* IPv4 */
722
to.in.sin_family = (sa_family_t)af;
723
ret = inet_pton(af, ip, &to.in.sin_addr);
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
724
745
}
725
746
if(ret < 0 ){
726
747
int e = errno;
735
756
goto mandos_end;
736
757
}
737
758
if(af == AF_INET6){
738
to.in6.sin6_port = htons(port);
739
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
740
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
741
-Wunreachable-code*/
759
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
760
if(IN6_IS_ADDR_LINKLOCAL
761
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
742
762
if(if_index == AVAHI_IF_UNSPEC){
743
763
fprintf_plus(stderr, "An IPv6 link-local address is"
744
764
" incomplete without a network interface\n");
746
766
goto mandos_end;
747
767
}
748
768
/* Set the network interface number as scope */
749
to.in6.sin6_scope_id = (uint32_t)if_index;
769
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
750
770
}
751
771
} else {
752
to.in.sin_port = htons(port); /* Spurious warnings from
753
-Wconversion and
754
-Wunreachable-code */
772
((struct sockaddr_in *)&to)->sin_port = htons(port);
755
773
}
756
774
757
775
if(quit_now){
774
792
}
775
793
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
776
794
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
777
const char *pcret;
778
795
if(af == AF_INET6){
779
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
780
sizeof(addrstr));
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in6),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
781
800
} else {
782
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
783
sizeof(addrstr));
801
ret = getnameinfo((struct sockaddr *)&to,
802
sizeof(struct sockaddr_in),
803
addrstr, sizeof(addrstr), NULL, 0,
804
NI_NUMERICHOST);
784
805
}
785
if(pcret == NULL){
786
perror_plus("inet_ntop");
787
} else {
788
if(strcmp(addrstr, ip) != 0){
789
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
790
}
806
if(ret == EAI_SYSTEM){
807
perror_plus("getnameinfo");
808
} else if(ret != 0) {
809
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
810
} else if(strcmp(addrstr, ip) != 0){
811
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
791
812
}
792
813
}
793
814
797
818
}
798
819
799
820
if(af == AF_INET6){
800
ret = connect(tcp_sd, &to.in6, sizeof(to));
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
801
823
} else {
802
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
803
826
}
804
827
if(ret < 0){
805
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
806
829
int e = errno;
807
830
perror_plus("connect");
808
831
errno = e;
1023
1046
return retval;
1024
1047
}
1025
1048
1049
__attribute__((nonnull))
1026
1050
static void resolve_callback(AvahiSServiceResolver *r,
1027
1051
AvahiIfIndex interface,
1028
1052
AvahiProtocol proto,
1036
1060
AVAHI_GCC_UNUSED AvahiStringList *txt,
1037
1061
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1038
1062
flags,
1039
void* mc){
1063
void *mc){
1040
1064
if(r == NULL){
1041
1065
return;
1042
1066
}
1095
1119
const char *domain,
1096
1120
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1097
1121
flags,
1098
void* mc){
1122
void *mc){
1099
1123
if(b == NULL){
1100
1124
return;
1101
1125
}
1161
1185
errno = old_errno;
1162
1186
}
1163
1187
1188
__attribute__((nonnull, warn_unused_result))
1164
1189
bool get_flags(const char *ifname, struct ifreq *ifr){
1165
1190
int ret;
1166
1191
error_t ret_errno;
1185
1210
return true;
1186
1211
}
1187
1212
1213
__attribute__((nonnull, warn_unused_result))
1188
1214
bool good_flags(const char *ifname, const struct ifreq *ifr){
1189
1215
1190
1216
/* Reject the loopback device */
1232
1258
* corresponds to an acceptable network device.
1233
1259
* (This function is passed to scandir(3) as a filter function.)
1234
1260
*/
1261
__attribute__((nonnull, warn_unused_result))
1235
1262
int good_interface(const struct dirent *if_entry){
1236
1263
if(if_entry->d_name[0] == '.'){
1237
1264
return 0;
1255
1282
/*
1256
1283
* This function determines if a network interface is up.
1257
1284
*/
1285
__attribute__((nonnull, warn_unused_result))
1258
1286
bool interface_is_up(const char *interface){
1259
1287
struct ifreq ifr;
1260
1288
if(not get_flags(interface, &ifr)){
1271
1299
/*
1272
1300
* This function determines if a network interface is running
1273
1301
*/
1302
__attribute__((nonnull, warn_unused_result))
1274
1303
bool interface_is_running(const char *interface){
1275
1304
struct ifreq ifr;
1276
1305
if(not get_flags(interface, &ifr)){
1284
1313
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1285
1314
}
1286
1315
1316
__attribute__((nonnull, pure, warn_unused_result))
1287
1317
int notdotentries(const struct dirent *direntry){
1288
1318
/* Skip "." and ".." */
1289
1319
if(direntry->d_name[0] == '.'
1296
1326
}
1297
1327
1298
1328
/* Is this directory entry a runnable program? */
1329
__attribute__((nonnull, warn_unused_result))
1299
1330
int runnable_hook(const struct dirent *direntry){
1300
1331
int ret;
1301
1332
size_t sret;
1309
1340
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1310
1341
"abcdefghijklmnopqrstuvwxyz"
1311
1342
"0123456789"
1312
"_-");
1343
"_.-");
1313
1344
if((direntry->d_name)[sret] != '\0'){
1314
1345
/* Contains non-allowed characters */
1315
1346
if(debug){
1319
1350
return 0;
1320
1351
}
1321
1352
1322
char *fullname = NULL;
1323
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1324
if(ret < 0){
1325
perror_plus("asprintf");
1326
return 0;
1327
}
1328
1329
ret = stat(fullname, &st);
1353
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1330
1354
if(ret == -1){
1331
1355
if(debug){
1332
1356
perror_plus("Could not stat hook");
1356
1380
return 1;
1357
1381
}
1358
1382
1383
__attribute__((nonnull, warn_unused_result))
1359
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
1385
mandos_context *mc){
1361
1386
int ret;
1365
1390
1366
1391
while(true){
1367
1392
if(mc->current_server == NULL){
1368
if (debug){
1393
if(debug){
1369
1394
fprintf_plus(stderr, "Wait until first server is found."
1370
1395
" No timeout!\n");
1371
1396
}
1372
1397
ret = avahi_simple_poll_iterate(s, -1);
1373
1398
} else {
1374
if (debug){
1399
if(debug){
1375
1400
fprintf_plus(stderr, "Check current_server if we should run"
1376
1401
" it, or wait\n");
1377
1402
}
1394
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1395
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1396
1421
1397
if (debug){
1422
if(debug){
1398
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1399
1424
block_time);
1400
1425
}
1422
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1423
1448
}
1424
1449
if(ret != 0){
1425
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1426
1451
return (ret != 1) ? ret : 0;
1427
1452
}
1428
1453
}
1430
1455
}
1431
1456
1432
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1433
1459
error_t raise_privileges(void){
1434
1460
error_t old_errno = errno;
1435
1461
error_t ret_errno = 0;
1436
1462
if(seteuid(0) == -1){
1437
1463
ret_errno = errno;
1438
perror_plus("seteuid");
1439
1464
}
1440
1465
errno = old_errno;
1441
1466
return ret_errno;
1442
1467
}
1443
1468
1444
1469
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1445
1471
error_t raise_privileges_permanently(void){
1446
1472
error_t old_errno = errno;
1447
1473
error_t ret_errno = raise_privileges();
1451
1477
}
1452
1478
if(setuid(0) == -1){
1453
1479
ret_errno = errno;
1454
perror_plus("seteuid");
1455
1480
}
1456
1481
errno = old_errno;
1457
1482
return ret_errno;
1458
1483
}
1459
1484
1460
1485
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1461
1487
error_t lower_privileges(void){
1462
1488
error_t old_errno = errno;
1463
1489
error_t ret_errno = 0;
1464
1490
if(seteuid(uid) == -1){
1465
1491
ret_errno = errno;
1466
perror_plus("seteuid");
1467
1492
}
1468
1493
errno = old_errno;
1469
1494
return ret_errno;
1470
1495
}
1471
1496
1472
1497
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1473
1499
error_t lower_privileges_permanently(void){
1474
1500
error_t old_errno = errno;
1475
1501
error_t ret_errno = 0;
1476
1502
if(setuid(uid) == -1){
1477
1503
ret_errno = errno;
1478
perror_plus("setuid");
1479
1504
}
1480
1505
errno = old_errno;
1481
1506
return ret_errno;
1482
1507
}
1483
1508
1484
bool run_network_hooks(const char *mode, const char *interface,
1509
__attribute__((nonnull))
1510
void run_network_hooks(const char *mode, const char *interface,
1485
1511
const float delay){
1486
struct dirent **direntries;
1512
struct dirent **direntries = NULL;
1513
if(hookdir_fd == -1){
1514
hookdir_fd = open(hookdir, O_RDONLY);
1515
if(hookdir_fd == -1){
1516
if(errno == ENOENT){
1517
if(debug){
1518
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1519
" found\n", hookdir);
1520
}
1521
} else {
1522
perror_plus("open");
1523
}
1524
return;
1525
}
1526
}
1527
#ifdef __GLIBC__
1528
#if __GLIBC_PREREQ(2, 15)
1529
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1530
runnable_hook, alphasort);
1531
#else /* not __GLIBC_PREREQ(2, 15) */
1532
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1533
alphasort);
1534
#endif /* not __GLIBC_PREREQ(2, 15) */
1535
#else /* not __GLIBC__ */
1536
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1537
alphasort);
1538
#endif /* not __GLIBC__ */
1539
if(numhooks == -1){
1540
perror_plus("scandir");
1541
return;
1542
}
1487
1543
struct dirent *direntry;
1488
1544
int ret;
1489
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1490
alphasort);
1491
if(numhooks == -1){
1492
if(errno == ENOENT){
1493
if(debug){
1494
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1495
" found\n", hookdir);
1496
}
1497
} else {
1498
perror_plus("scandir");
1545
int devnull = open("/dev/null", O_RDONLY);
1546
for(int i = 0; i < numhooks; i++){
1547
direntry = direntries[i];
1548
if(debug){
1549
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1550
direntry->d_name);
1499
1551
}
1500
} else {
1501
int devnull = open("/dev/null", O_RDONLY);
1502
for(int i = 0; i < numhooks; i++){
1503
direntry = direntries[i];
1504
char *fullname = NULL;
1505
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1506
if(ret < 0){
1552
pid_t hook_pid = fork();
1553
if(hook_pid == 0){
1554
/* Child */
1555
/* Raise privileges */
1556
errno = raise_privileges_permanently();
1557
if(errno != 0){
1558
perror_plus("Failed to raise privileges");
1559
_exit(EX_NOPERM);
1560
}
1561
/* Set group */
1562
errno = 0;
1563
ret = setgid(0);
1564
if(ret == -1){
1565
perror_plus("setgid");
1566
_exit(EX_NOPERM);
1567
}
1568
/* Reset supplementary groups */
1569
errno = 0;
1570
ret = setgroups(0, NULL);
1571
if(ret == -1){
1572
perror_plus("setgroups");
1573
_exit(EX_NOPERM);
1574
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1590
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1591
if(ret == -1){
1592
perror_plus("setenv");
1593
_exit(EX_OSERR);
1594
}
1595
ret = setenv("DEVICE", interface, 1);
1596
if(ret == -1){
1597
perror_plus("setenv");
1598
_exit(EX_OSERR);
1599
}
1600
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1601
if(ret == -1){
1602
perror_plus("setenv");
1603
_exit(EX_OSERR);
1604
}
1605
ret = setenv("MODE", mode, 1);
1606
if(ret == -1){
1607
perror_plus("setenv");
1608
_exit(EX_OSERR);
1609
}
1610
char *delaystring;
1611
ret = asprintf(&delaystring, "%f", (double)delay);
1612
if(ret == -1){
1507
1613
perror_plus("asprintf");
1508
continue;
1509
}
1510
if(debug){
1511
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1512
direntry->d_name);
1513
}
1514
pid_t hook_pid = fork();
1515
if(hook_pid == 0){
1516
/* Child */
1517
/* Raise privileges */
1518
raise_privileges_permanently();
1519
/* Set group */
1520
errno = 0;
1521
ret = setgid(0);
1522
if(ret == -1){
1523
perror_plus("setgid");
1524
}
1525
/* Reset supplementary groups */
1526
errno = 0;
1527
ret = setgroups(0, NULL);
1528
if(ret == -1){
1529
perror_plus("setgroups");
1530
}
1531
dup2(devnull, STDIN_FILENO);
1532
close(devnull);
1533
dup2(STDERR_FILENO, STDOUT_FILENO);
1534
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
ret = setenv("DEVICE", interface, 1);
1540
if(ret == -1){
1541
perror_plus("setenv");
1542
_exit(EX_OSERR);
1543
}
1544
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1545
if(ret == -1){
1546
perror_plus("setenv");
1547
_exit(EX_OSERR);
1548
}
1549
ret = setenv("MODE", mode, 1);
1550
if(ret == -1){
1551
perror_plus("setenv");
1552
_exit(EX_OSERR);
1553
}
1554
char *delaystring;
1555
ret = asprintf(&delaystring, "%f", delay);
1556
if(ret == -1){
1557
perror_plus("asprintf");
1558
_exit(EX_OSERR);
1559
}
1560
ret = setenv("DELAY", delaystring, 1);
1561
if(ret == -1){
1562
free(delaystring);
1563
perror_plus("setenv");
1564
_exit(EX_OSERR);
1565
}
1614
_exit(EX_OSERR);
1615
}
1616
ret = setenv("DELAY", delaystring, 1);
1617
if(ret == -1){
1566
1618
free(delaystring);
1567
if(connect_to != NULL){
1568
ret = setenv("CONNECT", connect_to, 1);
1569
if(ret == -1){
1570
perror_plus("setenv");
1571
_exit(EX_OSERR);
1572
}
1573
}
1574
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1575
perror_plus("execl");
1576
_exit(EXIT_FAILURE);
1577
}
1619
perror_plus("setenv");
1620
_exit(EX_OSERR);
1621
}
1622
free(delaystring);
1623
if(connect_to != NULL){
1624
ret = setenv("CONNECT", connect_to, 1);
1625
if(ret == -1){
1626
perror_plus("setenv");
1627
_exit(EX_OSERR);
1628
}
1629
}
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1631
if(hook_fd == -1){
1632
perror_plus("openat");
1633
_exit(EXIT_FAILURE);
1634
}
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1636
perror_plus("close");
1637
_exit(EXIT_FAILURE);
1638
}
1639
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1640
environ) == -1){
1641
perror_plus("fexecve");
1642
_exit(EXIT_FAILURE);
1643
}
1644
} else {
1645
int status;
1646
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1647
perror_plus("waitpid");
1648
continue;
1649
}
1650
if(WIFEXITED(status)){
1651
if(WEXITSTATUS(status) != 0){
1652
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1653
" with status %d\n", direntry->d_name,
1654
WEXITSTATUS(status));
1655
continue;
1656
}
1657
} else if(WIFSIGNALED(status)){
1658
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1659
" signal %d\n", direntry->d_name,
1660
WTERMSIG(status));
1661
continue;
1578
1662
} else {
1579
int status;
1580
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1581
perror_plus("waitpid");
1582
free(fullname);
1583
continue;
1584
}
1585
if(WIFEXITED(status)){
1586
if(WEXITSTATUS(status) != 0){
1587
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1588
" with status %d\n", direntry->d_name,
1589
WEXITSTATUS(status));
1590
free(fullname);
1591
continue;
1592
}
1593
} else if(WIFSIGNALED(status)){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1595
" signal %d\n", direntry->d_name,
1596
WTERMSIG(status));
1597
free(fullname);
1598
continue;
1599
} else {
1600
fprintf_plus(stderr, "Warning: network hook \"%s\""
1601
" crashed\n", direntry->d_name);
1602
free(fullname);
1603
continue;
1604
}
1605
}
1606
free(fullname);
1607
if(debug){
1608
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1609
direntry->d_name);
1610
}
1611
}
1612
close(devnull);
1613
}
1614
return true;
1663
fprintf_plus(stderr, "Warning: network hook \"%s\""
1664
" crashed\n", direntry->d_name);
1665
continue;
1666
}
1667
}
1668
if(debug){
1669
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1670
direntry->d_name);
1671
}
1672
}
1673
free(direntries);
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1675
perror_plus("close");
1676
} else {
1677
hookdir_fd = -1;
1678
}
1679
close(devnull);
1615
1680
}
1616
1681
1682
__attribute__((nonnull, warn_unused_result))
1617
1683
error_t bring_up_interface(const char *const interface,
1618
1684
const float delay){
1619
int sd = -1;
1620
1685
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1686
int ret;
1623
1687
struct ifreq network;
1624
1688
unsigned int if_index = if_nametoindex(interface);
1625
1689
if(if_index == 0){
1634
1698
}
1635
1699
1636
1700
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1701
error_t ret_errno = 0, ioctl_errno = 0;
1702
if(not get_flags(interface, &network)){
1638
1703
ret_errno = errno;
1639
1704
fprintf_plus(stderr, "Failed to get flags for interface "
1640
1705
"\"%s\"\n", interface);
1706
errno = old_errno;
1641
1707
return ret_errno;
1642
1708
}
1643
network.ifr_flags |= IFF_UP;
1709
network.ifr_flags |= IFF_UP; /* set flag */
1644
1710
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
1711
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1712
if(sd == -1){
1647
1713
ret_errno = errno;
1648
1714
perror_plus("socket");
1649
1715
errno = old_errno;
1650
1716
return ret_errno;
1651
1717
}
1652
1718
1653
1719
if(quit_now){
1654
close(sd);
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1721
if(ret == -1){
1722
perror_plus("close");
1723
}
1655
1724
errno = old_errno;
1656
1725
return EINTR;
1657
1726
}
1661
1730
interface);
1662
1731
}
1663
1732
1664
/* Raise priviliges */
1665
raise_privileges();
1733
/* Raise privileges */
1734
ret_errno = raise_privileges();
1735
if(ret_errno != 0){
1736
errno = ret_errno;
1737
perror_plus("Failed to raise privileges");
1738
}
1666
1739
1667
1740
#ifdef __linux__
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
1741
int ret_linux;
1742
bool restore_loglevel = false;
1743
if(ret_errno == 0){
1744
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1745
messages about the network interface to mess up the prompt */
1746
ret_linux = klogctl(8, NULL, 5);
1747
if(ret_linux == -1){
1748
perror_plus("klogctl");
1749
} else {
1750
restore_loglevel = true;
1751
}
1675
1752
}
1676
1753
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
1754
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1755
ioctl_errno = errno;
1679
1756
#ifdef __linux__
1680
1757
if(restore_loglevel){
1681
1758
ret_linux = klogctl(7, NULL, 0);
1685
1762
}
1686
1763
#endif /* __linux__ */
1687
1764
1688
/* Lower privileges */
1689
lower_privileges();
1765
/* If raise_privileges() succeeded above */
1766
if(ret_errno == 0){
1767
/* Lower privileges */
1768
ret_errno = lower_privileges();
1769
if(ret_errno != 0){
1770
errno = ret_errno;
1771
perror_plus("Failed to lower privileges");
1772
}
1773
}
1690
1774
1691
1775
/* Close the socket */
1692
1776
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1695
1779
}
1696
1780
1697
1781
if(ret_setflags == -1){
1698
errno = ret_errno;
1782
errno = ioctl_errno;
1699
1783
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1700
1784
errno = old_errno;
1701
return ret_errno;
1785
return ioctl_errno;
1702
1786
}
1703
1787
} else if(debug){
1704
1788
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1722
1806
return 0;
1723
1807
}
1724
1808
1809
__attribute__((nonnull, warn_unused_result))
1725
1810
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1727
1811
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
1812
struct ifreq network;
1731
1813
unsigned int if_index = if_nametoindex(interface);
1732
1814
if(if_index == 0){
1735
1817
return ENXIO;
1736
1818
}
1737
1819
if(interface_is_up(interface)){
1820
error_t ret_errno = 0, ioctl_errno = 0;
1738
1821
if(not get_flags(interface, &network) and debug){
1739
1822
ret_errno = errno;
1740
1823
fprintf_plus(stderr, "Failed to get flags for interface "
1741
1824
"\"%s\"\n", interface);
1825
errno = old_errno;
1742
1826
return ret_errno;
1743
1827
}
1744
1828
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1745
1829
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
1830
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1831
if(sd == -1){
1748
1832
ret_errno = errno;
1749
1833
perror_plus("socket");
1750
1834
errno = old_errno;
1756
1840
interface);
1757
1841
}
1758
1842
1759
/* Raise priviliges */
1760
raise_privileges();
1761
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1763
ret_errno = errno;
1764
1765
/* Lower privileges */
1766
lower_privileges();
1843
/* Raise privileges */
1844
ret_errno = raise_privileges();
1845
if(ret_errno != 0){
1846
errno = ret_errno;
1847
perror_plus("Failed to raise privileges");
1848
}
1849
1850
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1851
ioctl_errno = errno;
1852
1853
/* If raise_privileges() succeeded above */
1854
if(ret_errno == 0){
1855
/* Lower privileges */
1856
ret_errno = lower_privileges();
1857
if(ret_errno != 0){
1858
errno = ret_errno;
1859
perror_plus("Failed to lower privileges");
1860
}
1861
}
1767
1862
1768
1863
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1770
1865
if(ret == -1){
1771
1866
perror_plus("close");
1772
1867
}
1773
1868
1774
1869
if(ret_setflags == -1){
1775
errno = ret_errno;
1870
errno = ioctl_errno;
1776
1871
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1777
1872
errno = old_errno;
1778
return ret_errno;
1873
return ioctl_errno;
1779
1874
}
1780
1875
} else if(debug){
1781
1876
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
1884
int main(int argc, char *argv[]){
1790
1885
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
1886
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1793
1888
.interfaces = NULL, .interfaces_size = 0 };
1794
1889
AvahiSServiceBrowser *sb = NULL;
1795
1890
error_t ret_errno;
1799
1894
int exitcode = EXIT_SUCCESS;
1800
1895
char *interfaces_to_take_down = NULL;
1801
1896
size_t interfaces_to_take_down_size = 0;
1802
char tempdir[] = "/tmp/mandosXXXXXX";
1803
bool tempdir_created = false;
1897
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1898
char old_tempdir[] = "/tmp/mandosXXXXXX";
1899
char *tempdir = NULL;
1804
1900
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1805
1901
const char *seckey = PATHDIR "/" SECKEY;
1806
1902
const char *pubkey = PATHDIR "/" PUBKEY;
1807
1903
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1809
1904
1810
1905
bool gnutls_initialized = false;
1811
1906
bool gpgme_initialized = false;
1989
2084
/* Work around Debian bug #633582:
1990
2085
<http://bugs.debian.org/633582> */
1991
2086
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
2087
/* Re-raise privileges */
2088
ret_errno = raise_privileges();
2089
if(ret_errno != 0){
2090
errno = ret_errno;
2091
perror_plus("Failed to raise privileges");
2092
} else {
1994
2093
struct stat st;
1995
2094
1996
2095
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2036
2135
}
2037
2136
2038
2137
/* Lower privileges */
2039
lower_privileges();
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2141
perror_plus("Failed to lower privileges");
2142
}
2040
2143
}
2041
2144
}
2042
2145
2066
2169
goto end;
2067
2170
}
2068
2171
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2071
(int)',');
2072
}
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
2075
goto end;
2076
}
2172
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2173
}
2174
run_network_hooks("start", interfaces_hooks != NULL ?
2175
interfaces_hooks : "", delay);
2077
2176
}
2078
2177
2079
2178
if(not debug){
2157
2256
2158
2257
/* If no interfaces were specified, make a list */
2159
2258
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2259
struct dirent **direntries = NULL;
2161
2260
/* Look for any good interfaces */
2162
2261
ret = scandir(sys_class_net, &direntries, good_interface,
2163
2262
alphasort);
2167
2266
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
2267
direntries[i]->d_name);
2169
2268
if(ret_errno != 0){
2269
errno = ret_errno;
2170
2270
perror_plus("argz_add");
2171
2271
continue;
2172
2272
}
2177
2277
}
2178
2278
free(direntries);
2179
2279
} else {
2180
free(direntries);
2280
if(ret == 0){
2281
free(direntries);
2282
}
2181
2283
fprintf_plus(stderr, "Could not find a network interface\n");
2182
2284
exitcode = EXIT_FAILURE;
2183
2285
goto end;
2206
2308
break;
2207
2309
}
2208
2310
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2311
errno = bring_up_interface(interface, delay);
2210
2312
if(not interface_was_up){
2211
if(ret != 0){
2212
errno = ret;
2313
if(errno != 0){
2213
2314
perror_plus("Failed to bring up interface");
2214
2315
} else {
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
2316
errno = argz_add(&interfaces_to_take_down,
2317
&interfaces_to_take_down_size,
2318
interface);
2319
if(errno != 0){
2320
perror_plus("argz_add");
2321
}
2218
2322
}
2219
2323
}
2220
2324
}
2249
2353
goto end;
2250
2354
}
2251
2355
2252
if(mkdtemp(tempdir) == NULL){
2356
/* Try /run/tmp before /tmp */
2357
tempdir = mkdtemp(run_tempdir);
2358
if(tempdir == NULL and errno == ENOENT){
2359
if(debug){
2360
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2361
run_tempdir, old_tempdir);
2362
}
2363
tempdir = mkdtemp(old_tempdir);
2364
}
2365
if(tempdir == NULL){
2253
2366
perror_plus("mkdtemp");
2254
2367
goto end;
2255
2368
}
2256
tempdir_created = true;
2257
2369
2258
2370
if(quit_now){
2259
2371
goto end;
2331
2443
fprintf_plus(stderr, "Retrying in %d seconds\n",
2332
2444
(int)retry_interval);
2333
2445
}
2334
sleep((int)retry_interval);
2446
sleep((unsigned int)retry_interval);
2335
2447
}
2336
2448
2337
if (not quit_now){
2449
if(not quit_now){
2338
2450
exitcode = EXIT_SUCCESS;
2339
2451
}
2340
2452
2395
2507
if(debug){
2396
2508
fprintf_plus(stderr, "Starting Avahi loop search\n");
2397
2509
}
2398
2510
2399
2511
ret = avahi_loop_with_timeout(simple_poll,
2400
2512
(int)(retry_interval * 1000), &mc);
2401
2513
if(debug){
2442
2554
}
2443
2555
}
2444
2556
2445
/* Re-raise priviliges */
2557
/* Re-raise privileges */
2446
2558
{
2447
raise_privileges();
2448
2449
/* Run network hooks */
2450
run_network_hooks("stop", interfaces_hooks != NULL ?
2451
interfaces_hooks : "", delay);
2452
2453
/* Take down the network interfaces which were brought up */
2454
{
2455
char *interface = NULL;
2456
while((interface=argz_next(interfaces_to_take_down,
2457
interfaces_to_take_down_size,
2458
interface))){
2459
ret_errno = take_down_interface(interface);
2460
if(ret_errno != 0){
2461
errno = ret_errno;
2462
perror_plus("Failed to take down interface");
2463
}
2464
}
2465
if(debug and (interfaces_to_take_down == NULL)){
2466
fprintf_plus(stderr, "No interfaces needed to be taken"
2467
" down\n");
2468
}
2469
}
2470
2471
lower_privileges_permanently();
2559
ret_errno = raise_privileges();
2560
if(ret_errno != 0){
2561
errno = ret_errno;
2562
perror_plus("Failed to raise privileges");
2563
} else {
2564
2565
/* Run network hooks */
2566
run_network_hooks("stop", interfaces_hooks != NULL ?
2567
interfaces_hooks : "", delay);
2568
2569
/* Take down the network interfaces which were brought up */
2570
{
2571
char *interface = NULL;
2572
while((interface=argz_next(interfaces_to_take_down,
2573
interfaces_to_take_down_size,
2574
interface))){
2575
ret_errno = take_down_interface(interface);
2576
if(ret_errno != 0){
2577
errno = ret_errno;
2578
perror_plus("Failed to take down interface");
2579
}
2580
}
2581
if(debug and (interfaces_to_take_down == NULL)){
2582
fprintf_plus(stderr, "No interfaces needed to be taken"
2583
" down\n");
2584
}
2585
}
2586
}
2587
2588
ret_errno = lower_privileges_permanently();
2589
if(ret_errno != 0){
2590
errno = ret_errno;
2591
perror_plus("Failed to lower privileges permanently");
2592
}
2472
2593
}
2473
2594
2474
2595
free(interfaces_to_take_down);
2475
2596
free(interfaces_hooks);
2476
2597
2477
2598
/* Removes the GPGME temp directory and all files inside */
2478
if(tempdir_created){
2599
if(tempdir != NULL){
2479
2600
struct dirent **direntries = NULL;
2480
struct dirent *direntry = NULL;
2481
int numentries = scandir(tempdir, &direntries, notdotentries,
2482
alphasort);
2483
if (numentries > 0){
2484
for(int i = 0; i < numentries; i++){
2485
direntry = direntries[i];
2486
char *fullname = NULL;
2487
ret = asprintf(&fullname, "%s/%s", tempdir,
2488
direntry->d_name);
2489
if(ret < 0){
2490
perror_plus("asprintf");
2491
continue;
2492
}
2493
ret = remove(fullname);
2494
if(ret == -1){
2495
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2496
strerror(errno));
2497
}
2498
free(fullname);
2601
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2602
O_NOFOLLOW));
2603
if(tempdir_fd == -1){
2604
perror_plus("open");
2605
} else {
2606
#ifdef __GLIBC__
2607
#if __GLIBC_PREREQ(2, 15)
2608
int numentries = scandirat(tempdir_fd, ".", &direntries,
2609
notdotentries, alphasort);
2610
#else /* not __GLIBC_PREREQ(2, 15) */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC_PREREQ(2, 15) */
2614
#else /* not __GLIBC__ */
2615
int numentries = scandir(tempdir, &direntries, notdotentries,
2616
alphasort);
2617
#endif /* not __GLIBC__ */
2618
if(numentries >= 0){
2619
for(int i = 0; i < numentries; i++){
2620
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2621
if(ret == -1){
2622
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2623
" \"%s\", 0): %s\n", tempdir,
2624
direntries[i]->d_name, strerror(errno));
2625
}
2626
}
2627
2628
/* need to clean even if 0 because man page doesn't specify */
2629
free(direntries);
2630
if(numentries == -1){
2631
perror_plus("scandir");
2632
}
2633
ret = rmdir(tempdir);
2634
if(ret == -1 and errno != ENOENT){
2635
perror_plus("rmdir");
2636
}
2499
2637
}
2500
}
2501
2502
/* need to clean even if 0 because man page doesn't specify */
2503
free(direntries);
2504
if (numentries == -1){
2505
perror_plus("scandir");
2506
}
2507
ret = rmdir(tempdir);
2508
if(ret == -1 and errno != ENOENT){
2509
perror_plus("rmdir");
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
2510
2639
}
2511
2640
}
2512
2641
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0