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- Committer: Teddy Hogeborn
- Date: 2014-08-20 21:46:38 UTC
- Revision ID: teddy@recompile.se-20140820214638-k4naueej6hffdgfg
mandos-client: Bug fix: Check fork() return value.
When executing network hook scripts, check fork() return value.
* plugins.d/mandos-client.c (run_network_hooks): Bug fix: check if
fork() returns -1.
When executing network hook scripts, check fork() return value.
* plugins.d/mandos-client.c (run_network_hooks): Bug fix: check if
fork() returns -1.
- files added:
- debian/upstream
- files modified:
- DBUS-API
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
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
225
252
return false;
226
253
}
227
254
/* Special case of first server */
229
256
new_server->next = new_server;
230
257
new_server->prev = new_server;
231
258
*current_server = new_server;
232
/* Place the new server last in the list */
233
259
} else {
260
/* Place the new server last in the list */
234
261
new_server->next = *current_server;
235
262
new_server->prev = (*current_server)->prev;
236
263
new_server->prev->next = new_server;
237
264
(*current_server)->prev = new_server;
238
265
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
266
return true;
245
267
}
246
268
247
269
/*
248
270
* Initialize GPGME.
249
271
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
276
mandos_context *mc){
252
277
gpgme_error_t rc;
253
278
gpgme_engine_info_t engine_info;
254
279
255
280
/*
256
281
* Helper function to insert pub and seckey to the engine keyring.
257
282
*/
258
bool import_key(const char *filename){
283
bool import_key(const char * const filename){
259
284
int ret;
260
285
int fd;
261
286
gpgme_data_t pgp_data;
342
367
* Decrypt OpenPGP data.
343
368
* Returns -1 on error
344
369
*/
370
__attribute__((nonnull, warn_unused_result))
345
371
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
372
size_t crypto_size,
347
373
char **plaintext,
467
493
return plaintext_length;
468
494
}
469
495
470
static const char * safer_gnutls_strerror(int value){
496
__attribute__((warn_unused_result))
497
static const char *safer_gnutls_strerror(int value){
471
498
const char *ret = gnutls_strerror(value);
472
499
if(ret == NULL)
473
500
ret = "(unknown)";
475
502
}
476
503
477
504
/* GnuTLS log function callback */
505
__attribute__((nonnull))
478
506
static void debuggnutls(__attribute__((unused)) int level,
479
507
const char* string){
480
508
fprintf_plus(stderr, "GnuTLS: %s", string);
481
509
}
482
510
511
__attribute__((nonnull, warn_unused_result))
483
512
static int init_gnutls_global(const char *pubkeyfilename,
484
513
const char *seckeyfilename,
485
514
mandos_context *mc){
559
588
return -1;
560
589
}
561
590
591
__attribute__((nonnull, warn_unused_result))
562
592
static int init_gnutls_session(gnutls_session_t *session,
563
593
mandos_context *mc){
564
594
int ret;
621
651
__attribute__((unused)) const char *txt){}
622
652
623
653
/* Called when a Mandos server is found */
654
__attribute__((nonnull, warn_unused_result))
624
655
static int start_mandos_communication(const char *ip, in_port_t port,
625
656
AvahiIfIndex if_index,
626
657
int af, mandos_context *mc){
627
658
int ret, tcp_sd = -1;
628
659
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
660
struct sockaddr_storage to;
633
661
char *buffer = NULL;
634
662
char *decrypted_buffer = NULL;
635
663
size_t buffer_length = 0;
716
744
717
745
memset(&to, 0, sizeof(to));
718
746
if(af == AF_INET6){
719
to.in6.sin6_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in6.sin6_addr);
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
721
749
} else { /* IPv4 */
722
to.in.sin_family = (sa_family_t)af;
723
ret = inet_pton(af, ip, &to.in.sin_addr);
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
724
752
}
725
753
if(ret < 0 ){
726
754
int e = errno;
735
763
goto mandos_end;
736
764
}
737
765
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*/
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
742
769
if(if_index == AVAHI_IF_UNSPEC){
743
770
fprintf_plus(stderr, "An IPv6 link-local address is"
744
771
" incomplete without a network interface\n");
746
773
goto mandos_end;
747
774
}
748
775
/* Set the network interface number as scope */
749
to.in6.sin6_scope_id = (uint32_t)if_index;
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
750
777
}
751
778
} else {
752
to.in.sin_port = htons(port); /* Spurious warnings from
753
-Wconversion and
754
-Wunreachable-code */
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
755
780
}
756
781
757
782
if(quit_now){
774
799
}
775
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
776
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
777
const char *pcret;
778
802
if(af == AF_INET6){
779
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
780
sizeof(addrstr));
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
781
807
} else {
782
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
783
sizeof(addrstr));
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
784
812
}
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
}
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
791
819
}
792
820
}
793
821
797
825
}
798
826
799
827
if(af == AF_INET6){
800
ret = connect(tcp_sd, &to.in6, sizeof(to));
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
801
830
} else {
802
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
803
833
}
804
834
if(ret < 0){
805
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
806
836
int e = errno;
807
837
perror_plus("connect");
808
838
errno = e;
1023
1053
return retval;
1024
1054
}
1025
1055
1056
__attribute__((nonnull))
1026
1057
static void resolve_callback(AvahiSServiceResolver *r,
1027
1058
AvahiIfIndex interface,
1028
1059
AvahiProtocol proto,
1036
1067
AVAHI_GCC_UNUSED AvahiStringList *txt,
1037
1068
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1038
1069
flags,
1039
void* mc){
1070
void *mc){
1040
1071
if(r == NULL){
1041
1072
return;
1042
1073
}
1045
1076
timed out */
1046
1077
1047
1078
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1048
1080
return;
1049
1081
}
1050
1082
1095
1127
const char *domain,
1096
1128
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1097
1129
flags,
1098
void* mc){
1130
void *mc){
1099
1131
if(b == NULL){
1100
1132
return;
1101
1133
}
1161
1193
errno = old_errno;
1162
1194
}
1163
1195
1196
__attribute__((nonnull, warn_unused_result))
1164
1197
bool get_flags(const char *ifname, struct ifreq *ifr){
1165
1198
int ret;
1166
1199
error_t ret_errno;
1185
1218
return true;
1186
1219
}
1187
1220
1221
__attribute__((nonnull, warn_unused_result))
1188
1222
bool good_flags(const char *ifname, const struct ifreq *ifr){
1189
1223
1190
1224
/* Reject the loopback device */
1232
1266
* corresponds to an acceptable network device.
1233
1267
* (This function is passed to scandir(3) as a filter function.)
1234
1268
*/
1269
__attribute__((nonnull, warn_unused_result))
1235
1270
int good_interface(const struct dirent *if_entry){
1236
1271
if(if_entry->d_name[0] == '.'){
1237
1272
return 0;
1255
1290
/*
1256
1291
* This function determines if a network interface is up.
1257
1292
*/
1293
__attribute__((nonnull, warn_unused_result))
1258
1294
bool interface_is_up(const char *interface){
1259
1295
struct ifreq ifr;
1260
1296
if(not get_flags(interface, &ifr)){
1271
1307
/*
1272
1308
* This function determines if a network interface is running
1273
1309
*/
1310
__attribute__((nonnull, warn_unused_result))
1274
1311
bool interface_is_running(const char *interface){
1275
1312
struct ifreq ifr;
1276
1313
if(not get_flags(interface, &ifr)){
1284
1321
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1285
1322
}
1286
1323
1324
__attribute__((nonnull, pure, warn_unused_result))
1287
1325
int notdotentries(const struct dirent *direntry){
1288
1326
/* Skip "." and ".." */
1289
1327
if(direntry->d_name[0] == '.'
1296
1334
}
1297
1335
1298
1336
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1299
1338
int runnable_hook(const struct dirent *direntry){
1300
1339
int ret;
1301
1340
size_t sret;
1309
1348
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1310
1349
"abcdefghijklmnopqrstuvwxyz"
1311
1350
"0123456789"
1312
"_-");
1351
"_.-");
1313
1352
if((direntry->d_name)[sret] != '\0'){
1314
1353
/* Contains non-allowed characters */
1315
1354
if(debug){
1319
1358
return 0;
1320
1359
}
1321
1360
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);
1361
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1330
1362
if(ret == -1){
1331
1363
if(debug){
1332
1364
perror_plus("Could not stat hook");
1356
1388
return 1;
1357
1389
}
1358
1390
1391
__attribute__((nonnull, warn_unused_result))
1359
1392
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
1393
mandos_context *mc){
1361
1394
int ret;
1365
1398
1366
1399
while(true){
1367
1400
if(mc->current_server == NULL){
1368
if (debug){
1401
if(debug){
1369
1402
fprintf_plus(stderr, "Wait until first server is found."
1370
1403
" No timeout!\n");
1371
1404
}
1372
1405
ret = avahi_simple_poll_iterate(s, -1);
1373
1406
} else {
1374
if (debug){
1407
if(debug){
1375
1408
fprintf_plus(stderr, "Check current_server if we should run"
1376
1409
" it, or wait\n");
1377
1410
}
1394
1427
- ((intmax_t)waited_time.tv_sec * 1000))
1395
1428
- ((intmax_t)waited_time.tv_nsec / 1000000));
1396
1429
1397
if (debug){
1430
if(debug){
1398
1431
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1399
1432
block_time);
1400
1433
}
1422
1455
ret = avahi_simple_poll_iterate(s, (int)block_time);
1423
1456
}
1424
1457
if(ret != 0){
1425
if (ret > 0 or errno != EINTR){
1458
if(ret > 0 or errno != EINTR){
1426
1459
return (ret != 1) ? ret : 0;
1427
1460
}
1428
1461
}
1430
1463
}
1431
1464
1432
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1433
1467
error_t raise_privileges(void){
1434
1468
error_t old_errno = errno;
1435
1469
error_t ret_errno = 0;
1436
1470
if(seteuid(0) == -1){
1437
1471
ret_errno = errno;
1438
perror_plus("seteuid");
1439
1472
}
1440
1473
errno = old_errno;
1441
1474
return ret_errno;
1442
1475
}
1443
1476
1444
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1445
1479
error_t raise_privileges_permanently(void){
1446
1480
error_t old_errno = errno;
1447
1481
error_t ret_errno = raise_privileges();
1451
1485
}
1452
1486
if(setuid(0) == -1){
1453
1487
ret_errno = errno;
1454
perror_plus("seteuid");
1455
1488
}
1456
1489
errno = old_errno;
1457
1490
return ret_errno;
1458
1491
}
1459
1492
1460
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1461
1495
error_t lower_privileges(void){
1462
1496
error_t old_errno = errno;
1463
1497
error_t ret_errno = 0;
1464
1498
if(seteuid(uid) == -1){
1465
1499
ret_errno = errno;
1466
perror_plus("seteuid");
1467
1500
}
1468
1501
errno = old_errno;
1469
1502
return ret_errno;
1470
1503
}
1471
1504
1472
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1473
1507
error_t lower_privileges_permanently(void){
1474
1508
error_t old_errno = errno;
1475
1509
error_t ret_errno = 0;
1476
1510
if(setuid(uid) == -1){
1477
1511
ret_errno = errno;
1478
perror_plus("setuid");
1479
1512
}
1480
1513
errno = old_errno;
1481
1514
return ret_errno;
1482
1515
}
1483
1516
1484
bool run_network_hooks(const char *mode, const char *interface,
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1485
1519
const float delay){
1486
struct dirent **direntries;
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1525
if(debug){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1528
}
1529
} else {
1530
perror_plus("open");
1531
}
1532
return;
1533
}
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1547
if(numhooks == -1){
1548
perror_plus("scandir");
1549
return;
1550
}
1487
1551
struct dirent *direntry;
1488
1552
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");
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1556
if(debug){
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1558
direntry->d_name);
1499
1559
}
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){
1560
pid_t hook_pid = fork();
1561
if(hook_pid == 0){
1562
/* Child */
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1565
if(errno != 0){
1566
perror_plus("Failed to raise privileges");
1567
_exit(EX_NOPERM);
1568
}
1569
/* Set group */
1570
errno = 0;
1571
ret = setgid(0);
1572
if(ret == -1){
1573
perror_plus("setgid");
1574
_exit(EX_NOPERM);
1575
}
1576
/* Reset supplementary groups */
1577
errno = 0;
1578
ret = setgroups(0, NULL);
1579
if(ret == -1){
1580
perror_plus("setgroups");
1581
_exit(EX_NOPERM);
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
ret = setenv("DEVICE", interface, 1);
1604
if(ret == -1){
1605
perror_plus("setenv");
1606
_exit(EX_OSERR);
1607
}
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
if(ret == -1){
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("MODE", mode, 1);
1614
if(ret == -1){
1615
perror_plus("setenv");
1616
_exit(EX_OSERR);
1617
}
1618
char *delaystring;
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1620
if(ret == -1){
1507
1621
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
}
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
if(ret == -1){
1566
1626
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
}
1627
perror_plus("setenv");
1628
_exit(EX_OSERR);
1629
}
1630
free(delaystring);
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1633
if(ret == -1){
1634
perror_plus("setenv");
1635
_exit(EX_OSERR);
1636
}
1637
}
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
if(hook_fd == -1){
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1642
}
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1646
}
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
environ) == -1){
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1651
}
1652
} else {
1653
if(hook_pid == -1){
1654
perror_plus("fork");
1655
free(direntry);
1656
continue;
1657
}
1658
int status;
1659
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1660
perror_plus("waitpid");
1661
free(direntry);
1662
continue;
1663
}
1664
if(WIFEXITED(status)){
1665
if(WEXITSTATUS(status) != 0){
1666
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1667
" with status %d\n", direntry->d_name,
1668
WEXITSTATUS(status));
1669
free(direntry);
1670
continue;
1671
}
1672
} else if(WIFSIGNALED(status)){
1673
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1674
" signal %d\n", direntry->d_name,
1675
WTERMSIG(status));
1676
free(direntry);
1677
continue;
1578
1678
} 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;
1679
fprintf_plus(stderr, "Warning: network hook \"%s\""
1680
" crashed\n", direntry->d_name);
1681
free(direntry);
1682
continue;
1683
}
1684
}
1685
if(debug){
1686
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1687
direntry->d_name);
1688
}
1689
free(direntry);
1690
}
1691
free(direntries);
1692
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1693
perror_plus("close");
1694
} else {
1695
hookdir_fd = -1;
1696
}
1697
close(devnull);
1615
1698
}
1616
1699
1700
__attribute__((nonnull, warn_unused_result))
1617
1701
error_t bring_up_interface(const char *const interface,
1618
1702
const float delay){
1619
int sd = -1;
1620
1703
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1704
int ret;
1623
1705
struct ifreq network;
1624
1706
unsigned int if_index = if_nametoindex(interface);
1625
1707
if(if_index == 0){
1634
1716
}
1635
1717
1636
1718
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1719
error_t ret_errno = 0, ioctl_errno = 0;
1720
if(not get_flags(interface, &network)){
1638
1721
ret_errno = errno;
1639
1722
fprintf_plus(stderr, "Failed to get flags for interface "
1640
1723
"\"%s\"\n", interface);
1724
errno = old_errno;
1641
1725
return ret_errno;
1642
1726
}
1643
network.ifr_flags |= IFF_UP;
1727
network.ifr_flags |= IFF_UP; /* set flag */
1644
1728
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
1729
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1730
if(sd == -1){
1647
1731
ret_errno = errno;
1648
1732
perror_plus("socket");
1649
1733
errno = old_errno;
1650
1734
return ret_errno;
1651
1735
}
1652
1736
1653
1737
if(quit_now){
1654
close(sd);
1738
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1739
if(ret == -1){
1740
perror_plus("close");
1741
}
1655
1742
errno = old_errno;
1656
1743
return EINTR;
1657
1744
}
1661
1748
interface);
1662
1749
}
1663
1750
1664
/* Raise priviliges */
1665
raise_privileges();
1751
/* Raise privileges */
1752
ret_errno = raise_privileges();
1753
if(ret_errno != 0){
1754
errno = ret_errno;
1755
perror_plus("Failed to raise privileges");
1756
}
1666
1757
1667
1758
#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");
1759
int ret_linux;
1760
bool restore_loglevel = false;
1761
if(ret_errno == 0){
1762
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1763
messages about the network interface to mess up the prompt */
1764
ret_linux = klogctl(8, NULL, 5);
1765
if(ret_linux == -1){
1766
perror_plus("klogctl");
1767
} else {
1768
restore_loglevel = true;
1769
}
1675
1770
}
1676
1771
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
1772
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1773
ioctl_errno = errno;
1679
1774
#ifdef __linux__
1680
1775
if(restore_loglevel){
1681
1776
ret_linux = klogctl(7, NULL, 0);
1685
1780
}
1686
1781
#endif /* __linux__ */
1687
1782
1688
/* Lower privileges */
1689
lower_privileges();
1783
/* If raise_privileges() succeeded above */
1784
if(ret_errno == 0){
1785
/* Lower privileges */
1786
ret_errno = lower_privileges();
1787
if(ret_errno != 0){
1788
errno = ret_errno;
1789
perror_plus("Failed to lower privileges");
1790
}
1791
}
1690
1792
1691
1793
/* Close the socket */
1692
1794
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1695
1797
}
1696
1798
1697
1799
if(ret_setflags == -1){
1698
errno = ret_errno;
1800
errno = ioctl_errno;
1699
1801
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1700
1802
errno = old_errno;
1701
return ret_errno;
1803
return ioctl_errno;
1702
1804
}
1703
1805
} else if(debug){
1704
1806
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1722
1824
return 0;
1723
1825
}
1724
1826
1827
__attribute__((nonnull, warn_unused_result))
1725
1828
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1727
1829
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
1830
struct ifreq network;
1731
1831
unsigned int if_index = if_nametoindex(interface);
1732
1832
if(if_index == 0){
1735
1835
return ENXIO;
1736
1836
}
1737
1837
if(interface_is_up(interface)){
1838
error_t ret_errno = 0, ioctl_errno = 0;
1738
1839
if(not get_flags(interface, &network) and debug){
1739
1840
ret_errno = errno;
1740
1841
fprintf_plus(stderr, "Failed to get flags for interface "
1741
1842
"\"%s\"\n", interface);
1843
errno = old_errno;
1742
1844
return ret_errno;
1743
1845
}
1744
1846
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1745
1847
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
1848
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1849
if(sd == -1){
1748
1850
ret_errno = errno;
1749
1851
perror_plus("socket");
1750
1852
errno = old_errno;
1756
1858
interface);
1757
1859
}
1758
1860
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();
1861
/* Raise privileges */
1862
ret_errno = raise_privileges();
1863
if(ret_errno != 0){
1864
errno = ret_errno;
1865
perror_plus("Failed to raise privileges");
1866
}
1867
1868
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1869
ioctl_errno = errno;
1870
1871
/* If raise_privileges() succeeded above */
1872
if(ret_errno == 0){
1873
/* Lower privileges */
1874
ret_errno = lower_privileges();
1875
if(ret_errno != 0){
1876
errno = ret_errno;
1877
perror_plus("Failed to lower privileges");
1878
}
1879
}
1767
1880
1768
1881
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1882
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1770
1883
if(ret == -1){
1771
1884
perror_plus("close");
1772
1885
}
1773
1886
1774
1887
if(ret_setflags == -1){
1775
errno = ret_errno;
1888
errno = ioctl_errno;
1776
1889
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1777
1890
errno = old_errno;
1778
return ret_errno;
1891
return ioctl_errno;
1779
1892
}
1780
1893
} else if(debug){
1781
1894
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
1902
int main(int argc, char *argv[]){
1790
1903
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
1904
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1905
"+CTYPE-OPENPGP", .current_server = NULL,
1793
1906
.interfaces = NULL, .interfaces_size = 0 };
1794
1907
AvahiSServiceBrowser *sb = NULL;
1795
1908
error_t ret_errno;
1799
1912
int exitcode = EXIT_SUCCESS;
1800
1913
char *interfaces_to_take_down = NULL;
1801
1914
size_t interfaces_to_take_down_size = 0;
1802
char tempdir[] = "/tmp/mandosXXXXXX";
1803
bool tempdir_created = false;
1915
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1916
char old_tempdir[] = "/tmp/mandosXXXXXX";
1917
char *tempdir = NULL;
1804
1918
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1805
1919
const char *seckey = PATHDIR "/" SECKEY;
1806
1920
const char *pubkey = PATHDIR "/" PUBKEY;
1807
1921
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1809
1922
1810
1923
bool gnutls_initialized = false;
1811
1924
bool gpgme_initialized = false;
1989
2102
/* Work around Debian bug #633582:
1990
2103
<http://bugs.debian.org/633582> */
1991
2104
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
2105
/* Re-raise privileges */
2106
ret_errno = raise_privileges();
2107
if(ret_errno != 0){
2108
errno = ret_errno;
2109
perror_plus("Failed to raise privileges");
2110
} else {
1994
2111
struct stat st;
1995
2112
1996
2113
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2036
2153
}
2037
2154
2038
2155
/* Lower privileges */
2039
lower_privileges();
2156
ret_errno = lower_privileges();
2157
if(ret_errno != 0){
2158
errno = ret_errno;
2159
perror_plus("Failed to lower privileges");
2160
}
2040
2161
}
2041
2162
}
2042
2163
2066
2187
goto end;
2067
2188
}
2068
2189
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
}
2190
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2191
}
2192
run_network_hooks("start", interfaces_hooks != NULL ?
2193
interfaces_hooks : "", delay);
2077
2194
}
2078
2195
2079
2196
if(not debug){
2157
2274
2158
2275
/* If no interfaces were specified, make a list */
2159
2276
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2277
struct dirent **direntries = NULL;
2161
2278
/* Look for any good interfaces */
2162
2279
ret = scandir(sys_class_net, &direntries, good_interface,
2163
2280
alphasort);
2167
2284
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
2285
direntries[i]->d_name);
2169
2286
if(ret_errno != 0){
2287
errno = ret_errno;
2170
2288
perror_plus("argz_add");
2289
free(direntries[i]);
2171
2290
continue;
2172
2291
}
2173
2292
if(debug){
2174
2293
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2175
2294
direntries[i]->d_name);
2176
2295
}
2296
free(direntries[i]);
2177
2297
}
2178
2298
free(direntries);
2179
2299
} else {
2180
free(direntries);
2300
if(ret == 0){
2301
free(direntries);
2302
}
2181
2303
fprintf_plus(stderr, "Could not find a network interface\n");
2182
2304
exitcode = EXIT_FAILURE;
2183
2305
goto end;
2206
2328
break;
2207
2329
}
2208
2330
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2331
errno = bring_up_interface(interface, delay);
2210
2332
if(not interface_was_up){
2211
if(ret != 0){
2212
errno = ret;
2333
if(errno != 0){
2213
2334
perror_plus("Failed to bring up interface");
2214
2335
} else {
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
2336
errno = argz_add(&interfaces_to_take_down,
2337
&interfaces_to_take_down_size,
2338
interface);
2339
if(errno != 0){
2340
perror_plus("argz_add");
2341
}
2218
2342
}
2219
2343
}
2220
2344
}
2249
2373
goto end;
2250
2374
}
2251
2375
2252
if(mkdtemp(tempdir) == NULL){
2376
/* Try /run/tmp before /tmp */
2377
tempdir = mkdtemp(run_tempdir);
2378
if(tempdir == NULL and errno == ENOENT){
2379
if(debug){
2380
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2381
run_tempdir, old_tempdir);
2382
}
2383
tempdir = mkdtemp(old_tempdir);
2384
}
2385
if(tempdir == NULL){
2253
2386
perror_plus("mkdtemp");
2254
2387
goto end;
2255
2388
}
2256
tempdir_created = true;
2257
2389
2258
2390
if(quit_now){
2259
2391
goto end;
2331
2463
fprintf_plus(stderr, "Retrying in %d seconds\n",
2332
2464
(int)retry_interval);
2333
2465
}
2334
sleep((int)retry_interval);
2466
sleep((unsigned int)retry_interval);
2335
2467
}
2336
2468
2337
if (not quit_now){
2469
if(not quit_now){
2338
2470
exitcode = EXIT_SUCCESS;
2339
2471
}
2340
2472
2395
2527
if(debug){
2396
2528
fprintf_plus(stderr, "Starting Avahi loop search\n");
2397
2529
}
2398
2530
2399
2531
ret = avahi_loop_with_timeout(simple_poll,
2400
2532
(int)(retry_interval * 1000), &mc);
2401
2533
if(debug){
2437
2569
mc.current_server->prev->next = NULL;
2438
2570
while(mc.current_server != NULL){
2439
2571
server *next = mc.current_server->next;
2572
#ifdef __GNUC__
2573
#pragma GCC diagnostic push
2574
#pragma GCC diagnostic ignored "-Wcast-qual"
2575
#endif
2576
free((char *)(mc.current_server->ip));
2577
#ifdef __GNUC__
2578
#pragma GCC diagnostic pop
2579
#endif
2440
2580
free(mc.current_server);
2441
2581
mc.current_server = next;
2442
2582
}
2443
2583
}
2444
2584
2445
/* Re-raise priviliges */
2585
/* Re-raise privileges */
2446
2586
{
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();
2587
ret_errno = raise_privileges();
2588
if(ret_errno != 0){
2589
errno = ret_errno;
2590
perror_plus("Failed to raise privileges");
2591
} else {
2592
2593
/* Run network hooks */
2594
run_network_hooks("stop", interfaces_hooks != NULL ?
2595
interfaces_hooks : "", delay);
2596
2597
/* Take down the network interfaces which were brought up */
2598
{
2599
char *interface = NULL;
2600
while((interface=argz_next(interfaces_to_take_down,
2601
interfaces_to_take_down_size,
2602
interface))){
2603
ret_errno = take_down_interface(interface);
2604
if(ret_errno != 0){
2605
errno = ret_errno;
2606
perror_plus("Failed to take down interface");
2607
}
2608
}
2609
if(debug and (interfaces_to_take_down == NULL)){
2610
fprintf_plus(stderr, "No interfaces needed to be taken"
2611
" down\n");
2612
}
2613
}
2614
}
2615
2616
ret_errno = lower_privileges_permanently();
2617
if(ret_errno != 0){
2618
errno = ret_errno;
2619
perror_plus("Failed to lower privileges permanently");
2620
}
2472
2621
}
2473
2622
2474
2623
free(interfaces_to_take_down);
2475
2624
free(interfaces_hooks);
2476
2625
2477
2626
/* Removes the GPGME temp directory and all files inside */
2478
if(tempdir_created){
2627
if(tempdir != NULL){
2479
2628
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);
2629
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2630
O_NOFOLLOW));
2631
if(tempdir_fd == -1){
2632
perror_plus("open");
2633
} else {
2634
#ifdef __GLIBC__
2635
#if __GLIBC_PREREQ(2, 15)
2636
int numentries = scandirat(tempdir_fd, ".", &direntries,
2637
notdotentries, alphasort);
2638
#else /* not __GLIBC_PREREQ(2, 15) */
2639
int numentries = scandir(tempdir, &direntries, notdotentries,
2640
alphasort);
2641
#endif /* not __GLIBC_PREREQ(2, 15) */
2642
#else /* not __GLIBC__ */
2643
int numentries = scandir(tempdir, &direntries, notdotentries,
2644
alphasort);
2645
#endif /* not __GLIBC__ */
2646
if(numentries >= 0){
2647
for(int i = 0; i < numentries; i++){
2648
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2649
if(ret == -1){
2650
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2651
" \"%s\", 0): %s\n", tempdir,
2652
direntries[i]->d_name, strerror(errno));
2653
}
2654
free(direntries[i]);
2655
}
2656
2657
/* need to clean even if 0 because man page doesn't specify */
2658
free(direntries);
2659
if(numentries == -1){
2660
perror_plus("scandir");
2661
}
2662
ret = rmdir(tempdir);
2663
if(ret == -1 and errno != ENOENT){
2664
perror_plus("rmdir");
2665
}
2499
2666
}
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");
2667
TEMP_FAILURE_RETRY(close(tempdir_fd));
2510
2668
}
2511
2669
}
2512
2670
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0