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- Committer: Teddy Hogeborn
- Date: 2014-03-10 07:04:09 UTC
- Revision ID: teddy@recompile.se-20140310070409-ho6p1wrnpopi2ny1
White space fix: change "if (" to "if(" in C code.
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- files added:
- debian/upstream-signing-key.pgp
- files removed:
- bugs.xml
- debian/upstream
- plugin-helpers
- 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 © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 Björn Påhlsson
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 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 /* not _LARGEFILE_SOURCE */
35
#endif
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
38
#endif
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror() */
43
stdout, ferror(), remove() */
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(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
52
51
#include <sys/ioctl.h> /* ioctl */
53
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
54
53
sockaddr_in6, PF_INET6,
58
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
59
58
inet_pton(), connect(),
60
59
getnameinfo() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open() */
62
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
62
*/
64
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
64
strtoimax() */
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
71
66
program_invocation_short_name */
72
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
78
73
*/
79
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
80
75
getuid(), getgid(), seteuid(),
81
setgid(), pause(), _exit(),
82
unlinkat() */
76
setgid(), pause(), _exit() */
83
77
#include <arpa/inet.h> /* inet_pton(), htons() */
84
78
#include <iso646.h> /* not, or, and */
85
79
#include <argp.h> /* struct argp_option, error_t, struct
147
141
static const char sys_class_net[] = "/sys/class/net";
148
142
char *connect_to = NULL;
149
143
const char *hookdir = HOOKDIR;
150
int hookdir_fd = -1;
151
144
uid_t uid = 65534;
152
145
gid_t gid = 65534;
153
146
190
183
perror(print_text);
191
184
}
192
185
193
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
__attribute__((format (gnu_printf, 2, 3)))
194
187
int fprintf_plus(FILE *stream, const char *format, ...){
195
188
va_list ap;
196
189
va_start (ap, format);
205
198
* bytes. "buffer_capacity" is how much is currently allocated,
206
199
* "buffer_length" is how much is already used.
207
200
*/
208
__attribute__((nonnull, warn_unused_result))
209
201
size_t incbuffer(char **buffer, size_t buffer_length,
210
202
size_t buffer_capacity){
211
203
if(buffer_length + BUFFER_SIZE > buffer_capacity){
224
216
}
225
217
226
218
/* Add server to set of servers to retry periodically */
227
__attribute__((nonnull, warn_unused_result))
228
219
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
229
220
int af, server **current_server){
230
221
int ret;
239
230
.af = af };
240
231
if(new_server->ip == NULL){
241
232
perror_plus("strdup");
242
free(new_server);
243
233
return false;
244
234
}
245
235
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
246
236
if(ret == -1){
247
237
perror_plus("clock_gettime");
248
#ifdef __GNUC__
249
#pragma GCC diagnostic push
250
#pragma GCC diagnostic ignored "-Wcast-qual"
251
#endif
252
free((char *)(new_server->ip));
253
#ifdef __GNUC__
254
#pragma GCC diagnostic pop
255
#endif
256
free(new_server);
257
238
return false;
258
239
}
259
240
/* Special case of first server */
261
242
new_server->next = new_server;
262
243
new_server->prev = new_server;
263
244
*current_server = new_server;
245
/* Place the new server last in the list */
264
246
} else {
265
/* Place the new server last in the list */
266
247
new_server->next = *current_server;
267
248
new_server->prev = (*current_server)->prev;
268
249
new_server->prev->next = new_server;
274
255
/*
275
256
* Initialize GPGME.
276
257
*/
277
__attribute__((nonnull, warn_unused_result))
278
static bool init_gpgme(const char * const seckey,
279
const char * const pubkey,
280
const char * const tempdir,
281
mandos_context *mc){
258
static bool init_gpgme(const char *seckey, const char *pubkey,
259
const char *tempdir, mandos_context *mc){
282
260
gpgme_error_t rc;
283
261
gpgme_engine_info_t engine_info;
284
262
285
263
/*
286
264
* Helper function to insert pub and seckey to the engine keyring.
287
265
*/
288
bool import_key(const char * const filename){
266
bool import_key(const char *filename){
289
267
int ret;
290
268
int fd;
291
269
gpgme_data_t pgp_data;
310
288
return false;
311
289
}
312
290
313
ret = close(fd);
291
ret = (int)TEMP_FAILURE_RETRY(close(fd));
314
292
if(ret == -1){
315
293
perror_plus("close");
316
294
}
372
350
* Decrypt OpenPGP data.
373
351
* Returns -1 on error
374
352
*/
375
__attribute__((nonnull, warn_unused_result))
376
353
static ssize_t pgp_packet_decrypt(const char *cryptotext,
377
354
size_t crypto_size,
378
355
char **plaintext,
498
475
return plaintext_length;
499
476
}
500
477
501
__attribute__((warn_unused_result, const))
502
static const char *safe_string(const char *str){
503
if(str == NULL)
504
return "(unknown)";
505
return str;
506
}
507
508
__attribute__((warn_unused_result))
509
static const char *safer_gnutls_strerror(int value){
478
static const char * safer_gnutls_strerror(int value){
510
479
const char *ret = gnutls_strerror(value);
511
return safe_string(ret);
480
if(ret == NULL)
481
ret = "(unknown)";
482
return ret;
512
483
}
513
484
514
485
/* GnuTLS log function callback */
515
__attribute__((nonnull))
516
486
static void debuggnutls(__attribute__((unused)) int level,
517
487
const char* string){
518
488
fprintf_plus(stderr, "GnuTLS: %s", string);
519
489
}
520
490
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
522
491
static int init_gnutls_global(const char *pubkeyfilename,
523
492
const char *seckeyfilename,
524
const char *dhparamsfilename,
525
493
mandos_context *mc){
526
494
int ret;
527
unsigned int uret;
528
495
529
496
if(debug){
530
497
fprintf_plus(stderr, "Initializing GnuTLS\n");
531
498
}
532
499
500
ret = gnutls_global_init();
501
if(ret != GNUTLS_E_SUCCESS){
502
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
503
safer_gnutls_strerror(ret));
504
return -1;
505
}
506
533
507
if(debug){
534
508
/* "Use a log level over 10 to enable all debugging options."
535
509
* - GnuTLS manual
543
517
if(ret != GNUTLS_E_SUCCESS){
544
518
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
545
519
safer_gnutls_strerror(ret));
520
gnutls_global_deinit();
546
521
return -1;
547
522
}
548
523
573
548
safer_gnutls_strerror(ret));
574
549
goto globalfail;
575
550
}
576
/* If a Diffie-Hellman parameters file was given, try to use it */
577
if(dhparamsfilename != NULL){
578
gnutls_datum_t params = { .data = NULL, .size = 0 };
579
do {
580
int dhpfile = open(dhparamsfilename, O_RDONLY);
581
if(dhpfile == -1){
582
perror_plus("open");
583
dhparamsfilename = NULL;
584
break;
585
}
586
size_t params_capacity = 0;
587
while(true){
588
params_capacity = incbuffer((char **)¶ms.data,
589
(size_t)params.size,
590
(size_t)params_capacity);
591
if(params_capacity == 0){
592
perror_plus("incbuffer");
593
free(params.data);
594
params.data = NULL;
595
dhparamsfilename = NULL;
596
break;
597
}
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
600
BUFFER_SIZE);
601
/* EOF */
602
if(bytes_read == 0){
603
break;
604
}
605
/* check bytes_read for failure */
606
if(bytes_read < 0){
607
perror_plus("read");
608
free(params.data);
609
params.data = NULL;
610
dhparamsfilename = NULL;
611
break;
612
}
613
params.size += (unsigned int)bytes_read;
614
}
615
if(params.data == NULL){
616
dhparamsfilename = NULL;
617
}
618
if(dhparamsfilename == NULL){
619
break;
620
}
621
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
622
GNUTLS_X509_FMT_PEM);
623
if(ret != GNUTLS_E_SUCCESS){
624
fprintf_plus(stderr, "Failed to parse DH parameters in file"
625
" \"%s\": %s\n", dhparamsfilename,
626
safer_gnutls_strerror(ret));
627
dhparamsfilename = NULL;
628
}
629
} while(false);
630
}
631
if(dhparamsfilename == NULL){
632
if(mc->dh_bits == 0){
633
/* Find out the optimal number of DH bits */
634
/* Try to read the private key file */
635
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
636
do {
637
int secfile = open(seckeyfilename, O_RDONLY);
638
if(secfile == -1){
639
perror_plus("open");
640
break;
641
}
642
size_t buffer_capacity = 0;
643
while(true){
644
buffer_capacity = incbuffer((char **)&buffer.data,
645
(size_t)buffer.size,
646
(size_t)buffer_capacity);
647
if(buffer_capacity == 0){
648
perror_plus("incbuffer");
649
free(buffer.data);
650
buffer.data = NULL;
651
break;
652
}
653
ssize_t bytes_read = read(secfile,
654
buffer.data + buffer.size,
655
BUFFER_SIZE);
656
/* EOF */
657
if(bytes_read == 0){
658
break;
659
}
660
/* check bytes_read for failure */
661
if(bytes_read < 0){
662
perror_plus("read");
663
free(buffer.data);
664
buffer.data = NULL;
665
break;
666
}
667
buffer.size += (unsigned int)bytes_read;
668
}
669
close(secfile);
670
} while(false);
671
/* If successful, use buffer to parse private key */
672
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
673
if(buffer.data != NULL){
674
{
675
gnutls_openpgp_privkey_t privkey = NULL;
676
ret = gnutls_openpgp_privkey_init(&privkey);
677
if(ret != GNUTLS_E_SUCCESS){
678
fprintf_plus(stderr, "Error initializing OpenPGP key"
679
" structure: %s",
680
safer_gnutls_strerror(ret));
681
free(buffer.data);
682
buffer.data = NULL;
683
} else {
684
ret = gnutls_openpgp_privkey_import
685
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
686
if(ret != GNUTLS_E_SUCCESS){
687
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
688
safer_gnutls_strerror(ret));
689
privkey = NULL;
690
}
691
free(buffer.data);
692
buffer.data = NULL;
693
if(privkey != NULL){
694
/* Use private key to suggest an appropriate
695
sec_param */
696
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
697
gnutls_openpgp_privkey_deinit(privkey);
698
if(debug){
699
fprintf_plus(stderr, "This OpenPGP key implies using"
700
" a GnuTLS security parameter \"%s\".\n",
701
safe_string(gnutls_sec_param_get_name
702
(sec_param)));
703
}
704
}
705
}
706
}
707
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
708
/* Err on the side of caution */
709
sec_param = GNUTLS_SEC_PARAM_ULTRA;
710
if(debug){
711
fprintf_plus(stderr, "Falling back to security parameter"
712
" \"%s\"\n",
713
safe_string(gnutls_sec_param_get_name
714
(sec_param)));
715
}
716
}
717
}
718
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
719
if(uret != 0){
720
mc->dh_bits = uret;
721
if(debug){
722
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
723
" implies %u DH bits; using that.\n",
724
safe_string(gnutls_sec_param_get_name
725
(sec_param)),
726
mc->dh_bits);
727
}
728
} else {
729
fprintf_plus(stderr, "Failed to get implied number of DH"
730
" bits for security parameter \"%s\"): %s\n",
731
safe_string(gnutls_sec_param_get_name
732
(sec_param)),
733
safer_gnutls_strerror(ret));
734
goto globalfail;
735
}
736
} else if(debug){
737
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
738
mc->dh_bits);
739
}
740
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
741
if(ret != GNUTLS_E_SUCCESS){
742
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
743
" bits): %s\n", mc->dh_bits,
744
safer_gnutls_strerror(ret));
745
goto globalfail;
746
}
747
}
551
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
552
if(ret != GNUTLS_E_SUCCESS){
553
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
554
safer_gnutls_strerror(ret));
555
goto globalfail;
556
}
557
748
558
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
749
559
750
560
return 0;
752
562
globalfail:
753
563
754
564
gnutls_certificate_free_credentials(mc->cred);
565
gnutls_global_deinit();
755
566
gnutls_dh_params_deinit(mc->dh_params);
756
567
return -1;
757
568
}
758
569
759
__attribute__((nonnull, warn_unused_result))
760
570
static int init_gnutls_session(gnutls_session_t *session,
761
571
mandos_context *mc){
762
572
int ret;
809
619
/* ignore client certificate if any. */
810
620
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
811
621
622
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
623
812
624
return 0;
813
625
}
814
626
816
628
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
817
629
__attribute__((unused)) const char *txt){}
818
630
819
/* Set effective uid to 0, return errno */
820
__attribute__((warn_unused_result))
821
int raise_privileges(void){
822
int old_errno = errno;
823
int ret = 0;
824
if(seteuid(0) == -1){
825
ret = errno;
826
}
827
errno = old_errno;
828
return ret;
829
}
830
831
/* Set effective and real user ID to 0. Return errno. */
832
__attribute__((warn_unused_result))
833
int raise_privileges_permanently(void){
834
int old_errno = errno;
835
int ret = raise_privileges();
836
if(ret != 0){
837
errno = old_errno;
838
return ret;
839
}
840
if(setuid(0) == -1){
841
ret = errno;
842
}
843
errno = old_errno;
844
return ret;
845
}
846
847
/* Set effective user ID to unprivileged saved user ID */
848
__attribute__((warn_unused_result))
849
int lower_privileges(void){
850
int old_errno = errno;
851
int ret = 0;
852
if(seteuid(uid) == -1){
853
ret = errno;
854
}
855
errno = old_errno;
856
return ret;
857
}
858
859
/* Lower privileges permanently */
860
__attribute__((warn_unused_result))
861
int lower_privileges_permanently(void){
862
int old_errno = errno;
863
int ret = 0;
864
if(setuid(uid) == -1){
865
ret = errno;
866
}
867
errno = old_errno;
868
return ret;
869
}
870
871
/* Helper function to add_local_route() and delete_local_route() */
872
__attribute__((nonnull, warn_unused_result))
873
static bool add_delete_local_route(const bool add,
874
const char *address,
875
AvahiIfIndex if_index){
876
int ret;
877
char helper[] = "mandos-client-iprouteadddel";
878
char add_arg[] = "add";
879
char delete_arg[] = "delete";
880
char debug_flag[] = "--debug";
881
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
882
if(pluginhelperdir == NULL){
883
if(debug){
884
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
885
" variable not set; cannot run helper\n");
886
}
887
return false;
888
}
889
890
char interface[IF_NAMESIZE];
891
if(if_indextoname((unsigned int)if_index, interface) == NULL){
892
perror_plus("if_indextoname");
893
return false;
894
}
895
896
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
897
if(devnull == -1){
898
perror_plus("open(\"/dev/null\", O_RDONLY)");
899
return false;
900
}
901
pid_t pid = fork();
902
if(pid == 0){
903
/* Child */
904
/* Raise privileges */
905
errno = raise_privileges_permanently();
906
if(errno != 0){
907
perror_plus("Failed to raise privileges");
908
/* _exit(EX_NOPERM); */
909
} else {
910
/* Set group */
911
errno = 0;
912
ret = setgid(0);
913
if(ret == -1){
914
perror_plus("setgid");
915
_exit(EX_NOPERM);
916
}
917
/* Reset supplementary groups */
918
errno = 0;
919
ret = setgroups(0, NULL);
920
if(ret == -1){
921
perror_plus("setgroups");
922
_exit(EX_NOPERM);
923
}
924
}
925
ret = dup2(devnull, STDIN_FILENO);
926
if(ret == -1){
927
perror_plus("dup2(devnull, STDIN_FILENO)");
928
_exit(EX_OSERR);
929
}
930
ret = close(devnull);
931
if(ret == -1){
932
perror_plus("close");
933
_exit(EX_OSERR);
934
}
935
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
936
if(ret == -1){
937
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
938
_exit(EX_OSERR);
939
}
940
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
941
O_RDONLY
942
| O_DIRECTORY
943
| O_PATH
944
| O_CLOEXEC));
945
if(helperdir_fd == -1){
946
perror_plus("open");
947
_exit(EX_UNAVAILABLE);
948
}
949
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
950
helper, O_RDONLY));
951
if(helper_fd == -1){
952
perror_plus("openat");
953
close(helperdir_fd);
954
_exit(EX_UNAVAILABLE);
955
}
956
close(helperdir_fd);
957
#ifdef __GNUC__
958
#pragma GCC diagnostic push
959
#pragma GCC diagnostic ignored "-Wcast-qual"
960
#endif
961
if(fexecve(helper_fd, (char *const [])
962
{ helper, add ? add_arg : delete_arg, (char *)address,
963
interface, debug ? debug_flag : NULL, NULL },
964
environ) == -1){
965
#ifdef __GNUC__
966
#pragma GCC diagnostic pop
967
#endif
968
perror_plus("fexecve");
969
_exit(EXIT_FAILURE);
970
}
971
}
972
if(pid == -1){
973
perror_plus("fork");
974
return false;
975
}
976
int status;
977
pid_t pret = -1;
978
errno = 0;
979
do {
980
pret = waitpid(pid, &status, 0);
981
if(pret == -1 and errno == EINTR and quit_now){
982
int errno_raising = 0;
983
if((errno = raise_privileges()) != 0){
984
errno_raising = errno;
985
perror_plus("Failed to raise privileges in order to"
986
" kill helper program");
987
}
988
if(kill(pid, SIGTERM) == -1){
989
perror_plus("kill");
990
}
991
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
992
perror_plus("Failed to lower privileges after killing"
993
" helper program");
994
}
995
return false;
996
}
997
} while(pret == -1 and errno == EINTR);
998
if(pret == -1){
999
perror_plus("waitpid");
1000
return false;
1001
}
1002
if(WIFEXITED(status)){
1003
if(WEXITSTATUS(status) != 0){
1004
fprintf_plus(stderr, "Error: iprouteadddel exited"
1005
" with status %d\n", WEXITSTATUS(status));
1006
return false;
1007
}
1008
return true;
1009
}
1010
if(WIFSIGNALED(status)){
1011
fprintf_plus(stderr, "Error: iprouteadddel died by"
1012
" signal %d\n", WTERMSIG(status));
1013
return false;
1014
}
1015
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1016
return false;
1017
}
1018
1019
__attribute__((nonnull, warn_unused_result))
1020
static bool add_local_route(const char *address,
1021
AvahiIfIndex if_index){
1022
if(debug){
1023
fprintf_plus(stderr, "Adding route to %s\n", address);
1024
}
1025
return add_delete_local_route(true, address, if_index);
1026
}
1027
1028
__attribute__((nonnull, warn_unused_result))
1029
static bool delete_local_route(const char *address,
1030
AvahiIfIndex if_index){
1031
if(debug){
1032
fprintf_plus(stderr, "Removing route to %s\n", address);
1033
}
1034
return add_delete_local_route(false, address, if_index);
1035
}
1036
1037
631
/* Called when a Mandos server is found */
1038
__attribute__((nonnull, warn_unused_result))
1039
632
static int start_mandos_communication(const char *ip, in_port_t port,
1040
633
AvahiIfIndex if_index,
1041
634
int af, mandos_context *mc){
1050
643
int retval = -1;
1051
644
gnutls_session_t session;
1052
645
int pf; /* Protocol family */
1053
bool route_added = false;
1054
646
1055
647
errno = 0;
1056
648
1114
706
PRIuMAX "\n", ip, (uintmax_t)port);
1115
707
}
1116
708
1117
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
709
tcp_sd = socket(pf, SOCK_STREAM, 0);
1118
710
if(tcp_sd < 0){
1119
711
int e = errno;
1120
712
perror_plus("socket");
1127
719
goto mandos_end;
1128
720
}
1129
721
722
memset(&to, 0, sizeof(to));
1130
723
if(af == AF_INET6){
1131
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1132
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1133
ret = inet_pton(af, ip, &to6->sin6_addr);
724
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
725
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1134
726
} else { /* IPv4 */
1135
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1136
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1137
ret = inet_pton(af, ip, &to4->sin_addr);
727
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
728
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1138
729
}
1139
730
if(ret < 0 ){
1140
731
int e = errno;
1149
740
goto mandos_end;
1150
741
}
1151
742
if(af == AF_INET6){
1152
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
743
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1153
744
if(IN6_IS_ADDR_LINKLOCAL
1154
745
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
1155
746
if(if_index == AVAHI_IF_UNSPEC){
1210
801
goto mandos_end;
1211
802
}
1212
803
1213
while(true){
1214
if(af == AF_INET6){
1215
ret = connect(tcp_sd, (struct sockaddr *)&to,
1216
sizeof(struct sockaddr_in6));
1217
} else {
1218
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1219
sizeof(struct sockaddr_in));
1220
}
1221
if(ret < 0){
1222
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1223
and if_index != AVAHI_IF_UNSPEC
1224
and connect_to == NULL
1225
and not route_added and
1226
((af == AF_INET6 and not
1227
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1228
&to)->sin6_addr)))
1229
or (af == AF_INET and
1230
/* Not a a IPv4LL address */
1231
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1232
& 0xFFFF0000L) != 0xA9FE0000L))){
1233
/* Work around Avahi bug - Avahi does not announce link-local
1234
addresses if it has a global address, so local hosts with
1235
*only* a link-local address (e.g. Mandos clients) cannot
1236
connect to a Mandos server announced by Avahi on a server
1237
host with a global address. Work around this by retrying
1238
with an explicit route added with the server's address.
1239
1240
Avahi bug reference:
1241
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1242
https://bugs.debian.org/587961
1243
*/
1244
if(debug){
1245
fprintf_plus(stderr, "Mandos server unreachable, trying"
1246
" direct route\n");
1247
}
1248
int e = errno;
1249
route_added = add_local_route(ip, if_index);
1250
if(route_added){
1251
continue;
1252
}
1253
errno = e;
1254
}
1255
if(errno != ECONNREFUSED or debug){
1256
int e = errno;
1257
perror_plus("connect");
1258
errno = e;
1259
}
1260
goto mandos_end;
1261
}
1262
1263
if(quit_now){
1264
errno = EINTR;
1265
goto mandos_end;
1266
}
1267
break;
804
if(af == AF_INET6){
805
ret = connect(tcp_sd, (struct sockaddr *)&to,
806
sizeof(struct sockaddr_in6));
807
} else {
808
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
809
sizeof(struct sockaddr_in));
810
}
811
if(ret < 0){
812
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
813
int e = errno;
814
perror_plus("connect");
815
errno = e;
816
}
817
goto mandos_end;
818
}
819
820
if(quit_now){
821
errno = EINTR;
822
goto mandos_end;
1268
823
}
1269
824
1270
825
const char *out = mandos_protocol_version;
1424
979
&decrypted_buffer, mc);
1425
980
if(decrypted_buffer_size >= 0){
1426
981
1427
clearerr(stdout);
1428
982
written = 0;
1429
983
while(written < (size_t) decrypted_buffer_size){
1430
984
if(quit_now){
1446
1000
}
1447
1001
written += (size_t)ret;
1448
1002
}
1449
ret = fflush(stdout);
1450
if(ret != 0){
1451
int e = errno;
1452
if(debug){
1453
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1454
strerror(errno));
1455
}
1456
errno = e;
1457
goto mandos_end;
1458
}
1459
1003
retval = 0;
1460
1004
}
1461
1005
}
1464
1008
1465
1009
mandos_end:
1466
1010
{
1467
if(route_added){
1468
if(not delete_local_route(ip, if_index)){
1469
fprintf_plus(stderr, "Failed to delete local route to %s on"
1470
" interface %d", ip, if_index);
1471
}
1472
}
1473
1011
int e = errno;
1474
1012
free(decrypted_buffer);
1475
1013
free(buffer);
1476
1014
if(tcp_sd >= 0){
1477
ret = close(tcp_sd);
1015
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1478
1016
}
1479
1017
if(ret == -1){
1480
1018
if(e == 0){
1492
1030
return retval;
1493
1031
}
1494
1032
1495
__attribute__((nonnull))
1496
1033
static void resolve_callback(AvahiSServiceResolver *r,
1497
1034
AvahiIfIndex interface,
1498
1035
AvahiProtocol proto,
1506
1043
AVAHI_GCC_UNUSED AvahiStringList *txt,
1507
1044
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1508
1045
flags,
1509
void *mc){
1046
void* mc){
1510
1047
if(r == NULL){
1511
1048
return;
1512
1049
}
1515
1052
timed out */
1516
1053
1517
1054
if(quit_now){
1518
avahi_s_service_resolver_free(r);
1519
1055
return;
1520
1056
}
1521
1057
1566
1102
const char *domain,
1567
1103
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1568
1104
flags,
1569
void *mc){
1105
void* mc){
1570
1106
if(b == NULL){
1571
1107
return;
1572
1108
}
1632
1168
errno = old_errno;
1633
1169
}
1634
1170
1635
__attribute__((nonnull, warn_unused_result))
1636
1171
bool get_flags(const char *ifname, struct ifreq *ifr){
1637
1172
int ret;
1638
int old_errno;
1173
error_t ret_errno;
1639
1174
1640
1175
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1641
1176
if(s < 0){
1642
old_errno = errno;
1177
ret_errno = errno;
1643
1178
perror_plus("socket");
1644
errno = old_errno;
1179
errno = ret_errno;
1645
1180
return false;
1646
1181
}
1647
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1648
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1182
strcpy(ifr->ifr_name, ifname);
1649
1183
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1650
1184
if(ret == -1){
1651
1185
if(debug){
1652
old_errno = errno;
1186
ret_errno = errno;
1653
1187
perror_plus("ioctl SIOCGIFFLAGS");
1654
errno = old_errno;
1188
errno = ret_errno;
1655
1189
}
1656
1190
return false;
1657
1191
}
1658
1192
return true;
1659
1193
}
1660
1194
1661
__attribute__((nonnull, warn_unused_result))
1662
1195
bool good_flags(const char *ifname, const struct ifreq *ifr){
1663
1196
1664
1197
/* Reject the loopback device */
1706
1239
* corresponds to an acceptable network device.
1707
1240
* (This function is passed to scandir(3) as a filter function.)
1708
1241
*/
1709
__attribute__((nonnull, warn_unused_result))
1710
1242
int good_interface(const struct dirent *if_entry){
1711
1243
if(if_entry->d_name[0] == '.'){
1712
1244
return 0;
1730
1262
/*
1731
1263
* This function determines if a network interface is up.
1732
1264
*/
1733
__attribute__((nonnull, warn_unused_result))
1734
1265
bool interface_is_up(const char *interface){
1735
1266
struct ifreq ifr;
1736
1267
if(not get_flags(interface, &ifr)){
1747
1278
/*
1748
1279
* This function determines if a network interface is running
1749
1280
*/
1750
__attribute__((nonnull, warn_unused_result))
1751
1281
bool interface_is_running(const char *interface){
1752
1282
struct ifreq ifr;
1753
1283
if(not get_flags(interface, &ifr)){
1761
1291
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1762
1292
}
1763
1293
1764
__attribute__((nonnull, pure, warn_unused_result))
1765
1294
int notdotentries(const struct dirent *direntry){
1766
1295
/* Skip "." and ".." */
1767
1296
if(direntry->d_name[0] == '.'
1774
1303
}
1775
1304
1776
1305
/* Is this directory entry a runnable program? */
1777
__attribute__((nonnull, warn_unused_result))
1778
1306
int runnable_hook(const struct dirent *direntry){
1779
1307
int ret;
1780
1308
size_t sret;
1788
1316
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1789
1317
"abcdefghijklmnopqrstuvwxyz"
1790
1318
"0123456789"
1791
"_.-");
1319
"_-");
1792
1320
if((direntry->d_name)[sret] != '\0'){
1793
1321
/* Contains non-allowed characters */
1794
1322
if(debug){
1798
1326
return 0;
1799
1327
}
1800
1328
1801
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1329
char *fullname = NULL;
1330
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1331
if(ret < 0){
1332
perror_plus("asprintf");
1333
return 0;
1334
}
1335
1336
ret = stat(fullname, &st);
1802
1337
if(ret == -1){
1803
1338
if(debug){
1804
1339
perror_plus("Could not stat hook");
1828
1363
return 1;
1829
1364
}
1830
1365
1831
__attribute__((nonnull, warn_unused_result))
1832
1366
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1833
1367
mandos_context *mc){
1834
1368
int ret;
1838
1372
1839
1373
while(true){
1840
1374
if(mc->current_server == NULL){
1841
if(debug){
1375
if (debug){
1842
1376
fprintf_plus(stderr, "Wait until first server is found."
1843
1377
" No timeout!\n");
1844
1378
}
1845
1379
ret = avahi_simple_poll_iterate(s, -1);
1846
1380
} else {
1847
if(debug){
1381
if (debug){
1848
1382
fprintf_plus(stderr, "Check current_server if we should run"
1849
1383
" it, or wait\n");
1850
1384
}
1867
1401
- ((intmax_t)waited_time.tv_sec * 1000))
1868
1402
- ((intmax_t)waited_time.tv_nsec / 1000000));
1869
1403
1870
if(debug){
1404
if (debug){
1871
1405
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1872
1406
block_time);
1873
1407
}
1895
1429
ret = avahi_simple_poll_iterate(s, (int)block_time);
1896
1430
}
1897
1431
if(ret != 0){
1898
if(ret > 0 or errno != EINTR){
1432
if (ret > 0 or errno != EINTR){
1899
1433
return (ret != 1) ? ret : 0;
1900
1434
}
1901
1435
}
1902
1436
}
1903
1437
}
1904
1438
1905
__attribute__((nonnull))
1906
void run_network_hooks(const char *mode, const char *interface,
1439
/* Set effective uid to 0, return errno */
1440
error_t raise_privileges(void){
1441
error_t old_errno = errno;
1442
error_t ret_errno = 0;
1443
if(seteuid(0) == -1){
1444
ret_errno = errno;
1445
perror_plus("seteuid");
1446
}
1447
errno = old_errno;
1448
return ret_errno;
1449
}
1450
1451
/* Set effective and real user ID to 0. Return errno. */
1452
error_t raise_privileges_permanently(void){
1453
error_t old_errno = errno;
1454
error_t ret_errno = raise_privileges();
1455
if(ret_errno != 0){
1456
errno = old_errno;
1457
return ret_errno;
1458
}
1459
if(setuid(0) == -1){
1460
ret_errno = errno;
1461
perror_plus("seteuid");
1462
}
1463
errno = old_errno;
1464
return ret_errno;
1465
}
1466
1467
/* Set effective user ID to unprivileged saved user ID */
1468
error_t lower_privileges(void){
1469
error_t old_errno = errno;
1470
error_t ret_errno = 0;
1471
if(seteuid(uid) == -1){
1472
ret_errno = errno;
1473
perror_plus("seteuid");
1474
}
1475
errno = old_errno;
1476
return ret_errno;
1477
}
1478
1479
/* Lower privileges permanently */
1480
error_t lower_privileges_permanently(void){
1481
error_t old_errno = errno;
1482
error_t ret_errno = 0;
1483
if(setuid(uid) == -1){
1484
ret_errno = errno;
1485
perror_plus("setuid");
1486
}
1487
errno = old_errno;
1488
return ret_errno;
1489
}
1490
1491
bool run_network_hooks(const char *mode, const char *interface,
1907
1492
const float delay){
1908
struct dirent **direntries = NULL;
1909
if(hookdir_fd == -1){
1910
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1911
| O_CLOEXEC);
1912
if(hookdir_fd == -1){
1913
if(errno == ENOENT){
1914
if(debug){
1915
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1916
" found\n", hookdir);
1917
}
1918
} else {
1919
perror_plus("open");
1920
}
1921
return;
1922
}
1923
}
1924
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1925
runnable_hook, alphasort);
1493
struct dirent **direntries;
1494
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1495
alphasort);
1926
1496
if(numhooks == -1){
1927
perror_plus("scandir");
1928
return;
1929
}
1930
struct dirent *direntry;
1931
int ret;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1933
if(devnull == -1){
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1935
return;
1936
}
1937
for(int i = 0; i < numhooks; i++){
1938
direntry = direntries[i];
1939
if(debug){
1940
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1941
direntry->d_name);
1497
if(errno == ENOENT){
1498
if(debug){
1499
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1500
" found\n", hookdir);
1501
}
1502
} else {
1503
perror_plus("scandir");
1942
1504
}
1943
pid_t hook_pid = fork();
1944
if(hook_pid == 0){
1945
/* Child */
1946
/* Raise privileges */
1947
errno = raise_privileges_permanently();
1948
if(errno != 0){
1949
perror_plus("Failed to raise privileges");
1950
_exit(EX_NOPERM);
1951
}
1952
/* Set group */
1953
errno = 0;
1954
ret = setgid(0);
1955
if(ret == -1){
1956
perror_plus("setgid");
1957
_exit(EX_NOPERM);
1958
}
1959
/* Reset supplementary groups */
1960
errno = 0;
1961
ret = setgroups(0, NULL);
1962
if(ret == -1){
1963
perror_plus("setgroups");
1964
_exit(EX_NOPERM);
1965
}
1966
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1967
if(ret == -1){
1968
perror_plus("setenv");
1969
_exit(EX_OSERR);
1970
}
1971
ret = setenv("DEVICE", interface, 1);
1972
if(ret == -1){
1973
perror_plus("setenv");
1974
_exit(EX_OSERR);
1975
}
1976
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1977
if(ret == -1){
1978
perror_plus("setenv");
1979
_exit(EX_OSERR);
1980
}
1981
ret = setenv("MODE", mode, 1);
1982
if(ret == -1){
1983
perror_plus("setenv");
1984
_exit(EX_OSERR);
1985
}
1986
char *delaystring;
1987
ret = asprintf(&delaystring, "%f", (double)delay);
1988
if(ret == -1){
1505
} else {
1506
struct dirent *direntry;
1507
int ret;
1508
int devnull = open("/dev/null", O_RDONLY);
1509
for(int i = 0; i < numhooks; i++){
1510
direntry = direntries[i];
1511
char *fullname = NULL;
1512
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1513
if(ret < 0){
1989
1514
perror_plus("asprintf");
1990
_exit(EX_OSERR);
1991
}
1992
ret = setenv("DELAY", delaystring, 1);
1993
if(ret == -1){
1515
continue;
1516
}
1517
if(debug){
1518
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1519
direntry->d_name);
1520
}
1521
pid_t hook_pid = fork();
1522
if(hook_pid == 0){
1523
/* Child */
1524
/* Raise privileges */
1525
raise_privileges_permanently();
1526
/* Set group */
1527
errno = 0;
1528
ret = setgid(0);
1529
if(ret == -1){
1530
perror_plus("setgid");
1531
}
1532
/* Reset supplementary groups */
1533
errno = 0;
1534
ret = setgroups(0, NULL);
1535
if(ret == -1){
1536
perror_plus("setgroups");
1537
}
1538
dup2(devnull, STDIN_FILENO);
1539
close(devnull);
1540
dup2(STDERR_FILENO, STDOUT_FILENO);
1541
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("DEVICE", interface, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1552
if(ret == -1){
1553
perror_plus("setenv");
1554
_exit(EX_OSERR);
1555
}
1556
ret = setenv("MODE", mode, 1);
1557
if(ret == -1){
1558
perror_plus("setenv");
1559
_exit(EX_OSERR);
1560
}
1561
char *delaystring;
1562
ret = asprintf(&delaystring, "%f", delay);
1563
if(ret == -1){
1564
perror_plus("asprintf");
1565
_exit(EX_OSERR);
1566
}
1567
ret = setenv("DELAY", delaystring, 1);
1568
if(ret == -1){
1569
free(delaystring);
1570
perror_plus("setenv");
1571
_exit(EX_OSERR);
1572
}
1994
1573
free(delaystring);
1995
perror_plus("setenv");
1996
_exit(EX_OSERR);
1997
}
1998
free(delaystring);
1999
if(connect_to != NULL){
2000
ret = setenv("CONNECT", connect_to, 1);
2001
if(ret == -1){
2002
perror_plus("setenv");
2003
_exit(EX_OSERR);
2004
}
2005
}
2006
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2007
direntry->d_name,
2008
O_RDONLY));
2009
if(hook_fd == -1){
2010
perror_plus("openat");
2011
_exit(EXIT_FAILURE);
2012
}
2013
if(close(hookdir_fd) == -1){
2014
perror_plus("close");
2015
_exit(EXIT_FAILURE);
2016
}
2017
ret = dup2(devnull, STDIN_FILENO);
2018
if(ret == -1){
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2020
_exit(EX_OSERR);
2021
}
2022
ret = close(devnull);
2023
if(ret == -1){
2024
perror_plus("close");
2025
_exit(EX_OSERR);
2026
}
2027
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2028
if(ret == -1){
2029
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2030
_exit(EX_OSERR);
2031
}
2032
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2033
environ) == -1){
2034
perror_plus("fexecve");
2035
_exit(EXIT_FAILURE);
2036
}
2037
} else {
2038
if(hook_pid == -1){
2039
perror_plus("fork");
2040
free(direntry);
2041
continue;
2042
}
2043
int status;
2044
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2045
perror_plus("waitpid");
2046
free(direntry);
2047
continue;
2048
}
2049
if(WIFEXITED(status)){
2050
if(WEXITSTATUS(status) != 0){
2051
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2052
" with status %d\n", direntry->d_name,
2053
WEXITSTATUS(status));
2054
free(direntry);
2055
continue;
2056
}
2057
} else if(WIFSIGNALED(status)){
2058
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2059
" signal %d\n", direntry->d_name,
2060
WTERMSIG(status));
2061
free(direntry);
2062
continue;
1574
if(connect_to != NULL){
1575
ret = setenv("CONNECT", connect_to, 1);
1576
if(ret == -1){
1577
perror_plus("setenv");
1578
_exit(EX_OSERR);
1579
}
1580
}
1581
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1582
perror_plus("execl");
1583
_exit(EXIT_FAILURE);
1584
}
2063
1585
} else {
2064
fprintf_plus(stderr, "Warning: network hook \"%s\""
2065
" crashed\n", direntry->d_name);
2066
free(direntry);
2067
continue;
2068
}
2069
}
2070
if(debug){
2071
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2072
direntry->d_name);
2073
}
2074
free(direntry);
2075
}
2076
free(direntries);
2077
if(close(hookdir_fd) == -1){
2078
perror_plus("close");
2079
} else {
2080
hookdir_fd = -1;
2081
}
2082
close(devnull);
1586
int status;
1587
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1588
perror_plus("waitpid");
1589
free(fullname);
1590
continue;
1591
}
1592
if(WIFEXITED(status)){
1593
if(WEXITSTATUS(status) != 0){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1595
" with status %d\n", direntry->d_name,
1596
WEXITSTATUS(status));
1597
free(fullname);
1598
continue;
1599
}
1600
} else if(WIFSIGNALED(status)){
1601
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1602
" signal %d\n", direntry->d_name,
1603
WTERMSIG(status));
1604
free(fullname);
1605
continue;
1606
} else {
1607
fprintf_plus(stderr, "Warning: network hook \"%s\""
1608
" crashed\n", direntry->d_name);
1609
free(fullname);
1610
continue;
1611
}
1612
}
1613
free(fullname);
1614
if(debug){
1615
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1616
direntry->d_name);
1617
}
1618
}
1619
close(devnull);
1620
}
1621
return true;
2083
1622
}
2084
1623
2085
__attribute__((nonnull, warn_unused_result))
2086
int bring_up_interface(const char *const interface,
2087
const float delay){
2088
int old_errno = errno;
2089
int ret;
1624
error_t bring_up_interface(const char *const interface,
1625
const float delay){
1626
int sd = -1;
1627
error_t old_errno = errno;
1628
error_t ret_errno = 0;
1629
int ret, ret_setflags;
2090
1630
struct ifreq network;
2091
1631
unsigned int if_index = if_nametoindex(interface);
2092
1632
if(if_index == 0){
2101
1641
}
2102
1642
2103
1643
if(not interface_is_up(interface)){
2104
int ret_errno = 0;
2105
int ioctl_errno = 0;
2106
if(not get_flags(interface, &network)){
1644
if(not get_flags(interface, &network) and debug){
2107
1645
ret_errno = errno;
2108
1646
fprintf_plus(stderr, "Failed to get flags for interface "
2109
1647
"\"%s\"\n", interface);
2110
errno = old_errno;
2111
1648
return ret_errno;
2112
1649
}
2113
network.ifr_flags |= IFF_UP; /* set flag */
1650
network.ifr_flags |= IFF_UP;
2114
1651
2115
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2116
if(sd == -1){
1652
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
if(sd < 0){
2117
1654
ret_errno = errno;
2118
1655
perror_plus("socket");
2119
1656
errno = old_errno;
2120
1657
return ret_errno;
2121
1658
}
2122
1659
2123
1660
if(quit_now){
2124
ret = close(sd);
2125
if(ret == -1){
2126
perror_plus("close");
2127
}
1661
close(sd);
2128
1662
errno = old_errno;
2129
1663
return EINTR;
2130
1664
}
2134
1668
interface);
2135
1669
}
2136
1670
2137
/* Raise privileges */
2138
ret_errno = raise_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2141
perror_plus("Failed to raise privileges");
2142
}
1671
/* Raise priviliges */
1672
raise_privileges();
2143
1673
2144
1674
#ifdef __linux__
2145
int ret_linux;
2146
bool restore_loglevel = false;
2147
if(ret_errno == 0){
2148
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2149
messages about the network interface to mess up the prompt */
2150
ret_linux = klogctl(8, NULL, 5);
2151
if(ret_linux == -1){
2152
perror_plus("klogctl");
2153
} else {
2154
restore_loglevel = true;
2155
}
1675
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1676
messages about the network interface to mess up the prompt */
1677
int ret_linux = klogctl(8, NULL, 5);
1678
bool restore_loglevel = true;
1679
if(ret_linux == -1){
1680
restore_loglevel = false;
1681
perror_plus("klogctl");
2156
1682
}
2157
1683
#endif /* __linux__ */
2158
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2159
ioctl_errno = errno;
1684
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1685
ret_errno = errno;
2160
1686
#ifdef __linux__
2161
1687
if(restore_loglevel){
2162
1688
ret_linux = klogctl(7, NULL, 0);
2166
1692
}
2167
1693
#endif /* __linux__ */
2168
1694
2169
/* If raise_privileges() succeeded above */
2170
if(ret_errno == 0){
2171
/* Lower privileges */
2172
ret_errno = lower_privileges();
2173
if(ret_errno != 0){
2174
errno = ret_errno;
2175
perror_plus("Failed to lower privileges");
2176
}
2177
}
1695
/* Lower privileges */
1696
lower_privileges();
2178
1697
2179
1698
/* Close the socket */
2180
ret = close(sd);
1699
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2181
1700
if(ret == -1){
2182
1701
perror_plus("close");
2183
1702
}
2184
1703
2185
1704
if(ret_setflags == -1){
2186
errno = ioctl_errno;
1705
errno = ret_errno;
2187
1706
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2188
1707
errno = old_errno;
2189
return ioctl_errno;
1708
return ret_errno;
2190
1709
}
2191
1710
} else if(debug){
2192
1711
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2210
1729
return 0;
2211
1730
}
2212
1731
2213
__attribute__((nonnull, warn_unused_result))
2214
int take_down_interface(const char *const interface){
2215
int old_errno = errno;
1732
error_t take_down_interface(const char *const interface){
1733
error_t old_errno = errno;
2216
1734
struct ifreq network;
2217
1735
unsigned int if_index = if_nametoindex(interface);
2218
1736
if(if_index == 0){
2221
1739
return ENXIO;
2222
1740
}
2223
1741
if(interface_is_up(interface)){
2224
int ret_errno = 0;
2225
int ioctl_errno = 0;
1742
error_t ret_errno = 0;
2226
1743
if(not get_flags(interface, &network) and debug){
2227
1744
ret_errno = errno;
2228
1745
fprintf_plus(stderr, "Failed to get flags for interface "
2229
1746
"\"%s\"\n", interface);
2230
errno = old_errno;
2231
1747
return ret_errno;
2232
1748
}
2233
1749
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2234
1750
2235
1751
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2236
if(sd == -1){
1752
if(sd < 0){
2237
1753
ret_errno = errno;
2238
1754
perror_plus("socket");
2239
1755
errno = old_errno;
2245
1761
interface);
2246
1762
}
2247
1763
2248
/* Raise privileges */
2249
ret_errno = raise_privileges();
2250
if(ret_errno != 0){
2251
errno = ret_errno;
2252
perror_plus("Failed to raise privileges");
2253
}
1764
/* Raise priviliges */
1765
raise_privileges();
2254
1766
2255
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2256
ioctl_errno = errno;
1768
ret_errno = errno;
2257
1769
2258
/* If raise_privileges() succeeded above */
2259
if(ret_errno == 0){
2260
/* Lower privileges */
2261
ret_errno = lower_privileges();
2262
if(ret_errno != 0){
2263
errno = ret_errno;
2264
perror_plus("Failed to lower privileges");
2265
}
2266
}
1770
/* Lower privileges */
1771
lower_privileges();
2267
1772
2268
1773
/* Close the socket */
2269
int ret = close(sd);
1774
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2270
1775
if(ret == -1){
2271
1776
perror_plus("close");
2272
1777
}
2273
1778
2274
1779
if(ret_setflags == -1){
2275
errno = ioctl_errno;
1780
errno = ret_errno;
2276
1781
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2277
1782
errno = old_errno;
2278
return ioctl_errno;
1783
return ret_errno;
2279
1784
}
2280
1785
} else if(debug){
2281
1786
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2287
1792
}
2288
1793
2289
1794
int main(int argc, char *argv[]){
2290
mandos_context mc = { .server = NULL, .dh_bits = 0,
2291
.priority = "SECURE256:!CTYPE-X.509"
2292
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2293
.current_server = NULL, .interfaces = NULL,
2294
.interfaces_size = 0 };
1795
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1796
.priority = "SECURE256:!CTYPE-X.509:"
1797
"+CTYPE-OPENPGP", .current_server = NULL,
1798
.interfaces = NULL, .interfaces_size = 0 };
2295
1799
AvahiSServiceBrowser *sb = NULL;
2296
1800
error_t ret_errno;
2297
1801
int ret;
2300
1804
int exitcode = EXIT_SUCCESS;
2301
1805
char *interfaces_to_take_down = NULL;
2302
1806
size_t interfaces_to_take_down_size = 0;
2303
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2304
char old_tempdir[] = "/tmp/mandosXXXXXX";
2305
char *tempdir = NULL;
1807
char tempdir[] = "/tmp/mandosXXXXXX";
1808
bool tempdir_created = false;
2306
1809
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2307
1810
const char *seckey = PATHDIR "/" SECKEY;
2308
1811
const char *pubkey = PATHDIR "/" PUBKEY;
2309
const char *dh_params_file = NULL;
2310
1812
char *interfaces_hooks = NULL;
2311
1813
2312
1814
bool gnutls_initialized = false;
2365
1867
.doc = "Bit length of the prime number used in the"
2366
1868
" Diffie-Hellman key exchange",
2367
1869
.group = 2 },
2368
{ .name = "dh-params", .key = 134,
2369
.arg = "FILE",
2370
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2371
" for the Diffie-Hellman key exchange",
2372
.group = 2 },
2373
1870
{ .name = "priority", .key = 130,
2374
1871
.arg = "STRING",
2375
1872
.doc = "GnuTLS priority string for the TLS handshake",
2430
1927
}
2431
1928
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2432
1929
break;
2433
case 134: /* --dh-params */
2434
dh_params_file = arg;
2435
break;
2436
1930
case 130: /* --priority */
2437
1931
mc.priority = arg;
2438
1932
break;
2478
1972
.args_doc = "",
2479
1973
.doc = "Mandos client -- Get and decrypt"
2480
1974
" passwords from a Mandos server" };
2481
ret_errno = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2483
switch(ret_errno){
1975
ret = argp_parse(&argp, argc, argv,
1976
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1977
switch(ret){
2484
1978
case 0:
2485
1979
break;
2486
1980
case ENOMEM:
2487
1981
default:
2488
errno = ret_errno;
1982
errno = ret;
2489
1983
perror_plus("argp_parse");
2490
1984
exitcode = EX_OSERR;
2491
1985
goto end;
2494
1988
goto end;
2495
1989
}
2496
1990
}
2497
1991
2498
1992
{
2499
1993
/* Work around Debian bug #633582:
2500
<https://bugs.debian.org/633582> */
1994
<http://bugs.debian.org/633582> */
2501
1995
2502
/* Re-raise privileges */
2503
ret = raise_privileges();
2504
if(ret != 0){
2505
errno = ret;
2506
perror_plus("Failed to raise privileges");
2507
} else {
1996
/* Re-raise priviliges */
1997
if(raise_privileges() == 0){
2508
1998
struct stat st;
2509
1999
2510
2000
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2524
2014
}
2525
2015
}
2526
2016
}
2527
close(seckey_fd);
2017
TEMP_FAILURE_RETRY(close(seckey_fd));
2528
2018
}
2529
2019
}
2530
2020
2531
2021
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2532
2022
int pubkey_fd = open(pubkey, O_RDONLY);
2533
2023
if(pubkey_fd == -1){
2545
2035
}
2546
2036
}
2547
2037
}
2548
close(pubkey_fd);
2549
}
2550
}
2551
2552
if(dh_params_file != NULL
2553
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2554
int dhparams_fd = open(dh_params_file, O_RDONLY);
2555
if(dhparams_fd == -1){
2556
perror_plus("open");
2557
} else {
2558
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2559
if(ret == -1){
2560
perror_plus("fstat");
2561
} else {
2562
if(S_ISREG(st.st_mode)
2563
and st.st_uid == 0 and st.st_gid == 0){
2564
ret = fchown(dhparams_fd, uid, gid);
2565
if(ret == -1){
2566
perror_plus("fchown");
2567
}
2568
}
2569
}
2570
close(dhparams_fd);
2571
}
2572
}
2573
2038
TEMP_FAILURE_RETRY(close(pubkey_fd));
2039
}
2040
}
2041
2574
2042
/* Lower privileges */
2575
ret = lower_privileges();
2576
if(ret != 0){
2577
errno = ret;
2578
perror_plus("Failed to lower privileges");
2579
}
2043
lower_privileges();
2580
2044
}
2581
2045
}
2582
2046
2608
2072
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2609
2073
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2610
2074
}
2611
run_network_hooks("start", interfaces_hooks != NULL ?
2612
interfaces_hooks : "", delay);
2075
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2076
interfaces_hooks : "", delay)){
2077
goto end;
2078
}
2613
2079
}
2614
2080
2615
2081
if(not debug){
2693
2159
2694
2160
/* If no interfaces were specified, make a list */
2695
2161
if(mc.interfaces == NULL){
2696
struct dirent **direntries = NULL;
2162
struct dirent **direntries;
2697
2163
/* Look for any good interfaces */
2698
2164
ret = scandir(sys_class_net, &direntries, good_interface,
2699
2165
alphasort);
2705
2171
if(ret_errno != 0){
2706
2172
errno = ret_errno;
2707
2173
perror_plus("argz_add");
2708
free(direntries[i]);
2709
2174
continue;
2710
2175
}
2711
2176
if(debug){
2712
2177
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2713
2178
direntries[i]->d_name);
2714
2179
}
2715
free(direntries[i]);
2716
2180
}
2717
2181
free(direntries);
2718
2182
} else {
2719
if(ret == 0){
2720
free(direntries);
2721
}
2183
free(direntries);
2722
2184
fprintf_plus(stderr, "Could not find a network interface\n");
2723
2185
exitcode = EXIT_FAILURE;
2724
2186
goto end;
2747
2209
break;
2748
2210
}
2749
2211
bool interface_was_up = interface_is_up(interface);
2750
errno = bring_up_interface(interface, delay);
2212
ret = bring_up_interface(interface, delay);
2751
2213
if(not interface_was_up){
2752
if(errno != 0){
2753
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2754
" %s\n", interface, strerror(errno));
2214
if(ret != 0){
2215
errno = ret;
2216
perror_plus("Failed to bring up interface");
2755
2217
} else {
2756
errno = argz_add(&interfaces_to_take_down,
2757
&interfaces_to_take_down_size,
2758
interface);
2759
if(errno != 0){
2218
ret_errno = argz_add(&interfaces_to_take_down,
2219
&interfaces_to_take_down_size,
2220
interface);
2221
if(ret_errno != 0){
2222
errno = ret_errno;
2760
2223
perror_plus("argz_add");
2761
2224
}
2762
2225
}
2780
2243
goto end;
2781
2244
}
2782
2245
2783
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2246
ret = init_gnutls_global(pubkey, seckey, &mc);
2784
2247
if(ret == -1){
2785
2248
fprintf_plus(stderr, "init_gnutls_global failed\n");
2786
2249
exitcode = EX_UNAVAILABLE;
2793
2256
goto end;
2794
2257
}
2795
2258
2796
/* Try /run/tmp before /tmp */
2797
tempdir = mkdtemp(run_tempdir);
2798
if(tempdir == NULL and errno == ENOENT){
2799
if(debug){
2800
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2801
run_tempdir, old_tempdir);
2802
}
2803
tempdir = mkdtemp(old_tempdir);
2804
}
2805
if(tempdir == NULL){
2259
if(mkdtemp(tempdir) == NULL){
2806
2260
perror_plus("mkdtemp");
2807
2261
goto end;
2808
2262
}
2263
tempdir_created = true;
2809
2264
2810
2265
if(quit_now){
2811
2266
goto end;
2886
2341
sleep((unsigned int)retry_interval);
2887
2342
}
2888
2343
2889
if(not quit_now){
2344
if (not quit_now){
2890
2345
exitcode = EXIT_SUCCESS;
2891
2346
}
2892
2347
2908
2363
2909
2364
/* Allocate a new server */
2910
2365
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2911
&config, NULL, NULL, &ret);
2366
&config, NULL, NULL, &ret_errno);
2912
2367
2913
2368
/* Free the Avahi configuration data */
2914
2369
avahi_server_config_free(&config);
2917
2372
/* Check if creating the Avahi server object succeeded */
2918
2373
if(mc.server == NULL){
2919
2374
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2920
avahi_strerror(ret));
2375
avahi_strerror(ret_errno));
2921
2376
exitcode = EX_UNAVAILABLE;
2922
2377
goto end;
2923
2378
}
2947
2402
if(debug){
2948
2403
fprintf_plus(stderr, "Starting Avahi loop search\n");
2949
2404
}
2950
2405
2951
2406
ret = avahi_loop_with_timeout(simple_poll,
2952
2407
(int)(retry_interval * 1000), &mc);
2953
2408
if(debug){
2958
2413
end:
2959
2414
2960
2415
if(debug){
2961
if(signal_received){
2962
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2963
argv[0], signal_received,
2964
strsignal(signal_received));
2965
} else {
2966
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2967
}
2416
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2968
2417
}
2969
2418
2970
2419
/* Cleanup things */
2981
2430
2982
2431
if(gnutls_initialized){
2983
2432
gnutls_certificate_free_credentials(mc.cred);
2433
gnutls_global_deinit();
2984
2434
gnutls_dh_params_deinit(mc.dh_params);
2985
2435
}
2986
2436
2994
2444
mc.current_server->prev->next = NULL;
2995
2445
while(mc.current_server != NULL){
2996
2446
server *next = mc.current_server->next;
2997
#ifdef __GNUC__
2998
#pragma GCC diagnostic push
2999
#pragma GCC diagnostic ignored "-Wcast-qual"
3000
#endif
3001
free((char *)(mc.current_server->ip));
3002
#ifdef __GNUC__
3003
#pragma GCC diagnostic pop
3004
#endif
3005
2447
free(mc.current_server);
3006
2448
mc.current_server = next;
3007
2449
}
3008
2450
}
3009
2451
3010
/* Re-raise privileges */
2452
/* Re-raise priviliges */
3011
2453
{
3012
ret = raise_privileges();
3013
if(ret != 0){
3014
errno = ret;
3015
perror_plus("Failed to raise privileges");
3016
} else {
3017
3018
/* Run network hooks */
3019
run_network_hooks("stop", interfaces_hooks != NULL ?
3020
interfaces_hooks : "", delay);
3021
3022
/* Take down the network interfaces which were brought up */
3023
{
3024
char *interface = NULL;
3025
while((interface=argz_next(interfaces_to_take_down,
3026
interfaces_to_take_down_size,
3027
interface))){
3028
ret = take_down_interface(interface);
3029
if(ret != 0){
3030
errno = ret;
3031
perror_plus("Failed to take down interface");
3032
}
3033
}
3034
if(debug and (interfaces_to_take_down == NULL)){
3035
fprintf_plus(stderr, "No interfaces needed to be taken"
3036
" down\n");
3037
}
3038
}
3039
}
3040
3041
ret = lower_privileges_permanently();
3042
if(ret != 0){
3043
errno = ret;
3044
perror_plus("Failed to lower privileges permanently");
3045
}
2454
raise_privileges();
2455
2456
/* Run network hooks */
2457
run_network_hooks("stop", interfaces_hooks != NULL ?
2458
interfaces_hooks : "", delay);
2459
2460
/* Take down the network interfaces which were brought up */
2461
{
2462
char *interface = NULL;
2463
while((interface=argz_next(interfaces_to_take_down,
2464
interfaces_to_take_down_size,
2465
interface))){
2466
ret_errno = take_down_interface(interface);
2467
if(ret_errno != 0){
2468
errno = ret_errno;
2469
perror_plus("Failed to take down interface");
2470
}
2471
}
2472
if(debug and (interfaces_to_take_down == NULL)){
2473
fprintf_plus(stderr, "No interfaces needed to be taken"
2474
" down\n");
2475
}
2476
}
2477
2478
lower_privileges_permanently();
3046
2479
}
3047
2480
3048
2481
free(interfaces_to_take_down);
3049
2482
free(interfaces_hooks);
3050
2483
3051
void clean_dir_at(int base, const char * const dirname,
3052
uintmax_t level){
2484
/* Removes the GPGME temp directory and all files inside */
2485
if(tempdir_created){
3053
2486
struct dirent **direntries = NULL;
3054
int dret;
3055
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3056
O_RDONLY
3057
| O_NOFOLLOW
3058
| O_DIRECTORY
3059
| O_PATH));
3060
if(dir_fd == -1){
3061
perror_plus("open");
3062
}
3063
int numentries = scandirat(dir_fd, ".", &direntries,
3064
notdotentries, alphasort);
3065
if(numentries >= 0){
2487
struct dirent *direntry = NULL;
2488
int numentries = scandir(tempdir, &direntries, notdotentries,
2489
alphasort);
2490
if (numentries > 0){
3066
2491
for(int i = 0; i < numentries; i++){
3067
if(debug){
3068
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3069
dirname, direntries[i]->d_name);
3070
}
3071
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3072
if(dret == -1){
3073
if(errno == EISDIR){
3074
dret = unlinkat(dir_fd, direntries[i]->d_name,
3075
AT_REMOVEDIR);
3076
}
3077
if((dret == -1) and (errno == ENOTEMPTY)
3078
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3079
== 0) and (level == 0)){
3080
/* Recurse only in this special case */
3081
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3082
dret = 0;
3083
}
3084
if(dret == -1){
3085
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3086
direntries[i]->d_name, strerror(errno));
3087
}
3088
}
3089
free(direntries[i]);
3090
}
3091
3092
/* need to clean even if 0 because man page doesn't specify */
3093
free(direntries);
3094
if(numentries == -1){
3095
perror_plus("scandirat");
3096
}
3097
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3098
if(dret == -1 and errno != ENOENT){
3099
perror_plus("rmdir");
3100
}
3101
} else {
3102
perror_plus("scandirat");
3103
}
3104
close(dir_fd);
3105
}
3106
3107
/* Removes the GPGME temp directory and all files inside */
3108
if(tempdir != NULL){
3109
clean_dir_at(-1, tempdir, 0);
2492
direntry = direntries[i];
2493
char *fullname = NULL;
2494
ret = asprintf(&fullname, "%s/%s", tempdir,
2495
direntry->d_name);
2496
if(ret < 0){
2497
perror_plus("asprintf");
2498
continue;
2499
}
2500
ret = remove(fullname);
2501
if(ret == -1){
2502
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2503
strerror(errno));
2504
}
2505
free(fullname);
2506
}
2507
}
2508
2509
/* need to clean even if 0 because man page doesn't specify */
2510
free(direntries);
2511
if (numentries == -1){
2512
perror_plus("scandir");
2513
}
2514
ret = rmdir(tempdir);
2515
if(ret == -1 and errno != ENOENT){
2516
perror_plus("rmdir");
2517
}
3110
2518
}
3111
2519
3112
2520
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0