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- Committer: Teddy Hogeborn
- Date: 2014-07-14 21:41:08 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 319.
- Revision ID: teddy@recompile.se-20140714214108-awg7u6gaiy7d40dz
mandos-monitor: New "verbose" mode to see less important log messages.
* mandos-monitor (MandosClientWidget.__init__): Log client creation.
(MandosClientWidget.checker_completed): Log a successful checker.
(MandosClientWidget.checker_started): Log starting of a checker.
(UserInterface.__init__): New optional "log_level" argument.
(UserInterface.log_message, UserInterface.log_message_raw): Take
optional
"level"
arg.
(UserInterface.toggle_log_display): Log visibility change.
(UserInterface.change_log_display): Log wrap mode change.
(UserInterface.process_input): Show new "v" key in help message and
process "v" key if pressed.
* mandos-monitor.xml (KEYS): Document new "v" key.
* mandos-monitor (MandosClientWidget.__init__): Log client creation.
(MandosClientWidget.checker_completed): Log a successful checker.
(MandosClientWidget.checker_started): Log starting of a checker.
(UserInterface.__init__): New optional "log_level" argument.
(UserInterface.log_message, UserInterface.log_message_raw): Take
optional
"level"
arg.
(UserInterface.toggle_log_display): Log visibility change.
(UserInterface.change_log_display): Log wrap mode change.
(UserInterface.process_input): Show new "v" key in help message and
process "v" key if pressed.
* mandos-monitor.xml (KEYS): Document new "v" key.
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 © 2008-2014 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
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() */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
59
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
62
*/
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
64
strtoimax() */
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
69
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
70
66
program_invocation_short_name */
71
67
#include <time.h> /* nanosleep(), time(), sleep() */
72
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
244
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
245
241
if(ret == -1){
246
242
perror_plus("clock_gettime");
247
#ifdef __GNUC__
248
#pragma GCC diagnostic push
249
#pragma GCC diagnostic ignored "-Wcast-qual"
250
#endif
251
free((char *)(new_server->ip));
252
#ifdef __GNUC__
253
#pragma GCC diagnostic pop
254
#endif
243
free(new_server->ip);
255
244
free(new_server);
256
245
return false;
257
246
}
309
298
return false;
310
299
}
311
300
312
ret = close(fd);
301
ret = (int)TEMP_FAILURE_RETRY(close(fd));
313
302
if(ret == -1){
314
303
perror_plus("close");
315
304
}
497
486
return plaintext_length;
498
487
}
499
488
500
__attribute__((warn_unused_result, const))
501
static const char *safe_string(const char *str){
502
if(str == NULL)
503
return "(unknown)";
504
return str;
505
}
506
507
489
__attribute__((warn_unused_result))
508
490
static const char *safer_gnutls_strerror(int value){
509
491
const char *ret = gnutls_strerror(value);
510
return safe_string(ret);
492
if(ret == NULL)
493
ret = "(unknown)";
494
return ret;
511
495
}
512
496
513
497
/* GnuTLS log function callback */
517
501
fprintf_plus(stderr, "GnuTLS: %s", string);
518
502
}
519
503
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
504
__attribute__((nonnull, warn_unused_result))
521
505
static int init_gnutls_global(const char *pubkeyfilename,
522
506
const char *seckeyfilename,
523
const char *dhparamsfilename,
524
507
mandos_context *mc){
525
508
int ret;
526
unsigned int uret;
527
509
528
510
if(debug){
529
511
fprintf_plus(stderr, "Initializing GnuTLS\n");
530
512
}
531
513
514
ret = gnutls_global_init();
515
if(ret != GNUTLS_E_SUCCESS){
516
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
517
safer_gnutls_strerror(ret));
518
return -1;
519
}
520
532
521
if(debug){
533
522
/* "Use a log level over 10 to enable all debugging options."
534
523
* - GnuTLS manual
542
531
if(ret != GNUTLS_E_SUCCESS){
543
532
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
544
533
safer_gnutls_strerror(ret));
534
gnutls_global_deinit();
545
535
return -1;
546
536
}
547
537
572
562
safer_gnutls_strerror(ret));
573
563
goto globalfail;
574
564
}
575
/* If a Diffie-Hellman parameters file was given, try to use it */
576
if(dhparamsfilename != NULL){
577
gnutls_datum_t params = { .data = NULL, .size = 0 };
578
do {
579
int dhpfile = open(dhparamsfilename, O_RDONLY);
580
if(dhpfile == -1){
581
perror_plus("open");
582
dhparamsfilename = NULL;
583
break;
584
}
585
size_t params_capacity = 0;
586
while(true){
587
params_capacity = incbuffer((char **)¶ms.data,
588
(size_t)params.size,
589
(size_t)params_capacity);
590
if(params_capacity == 0){
591
perror_plus("incbuffer");
592
free(params.data);
593
params.data = NULL;
594
dhparamsfilename = NULL;
595
break;
596
}
597
ssize_t bytes_read = read(dhpfile,
598
params.data + params.size,
599
BUFFER_SIZE);
600
/* EOF */
601
if(bytes_read == 0){
602
break;
603
}
604
/* check bytes_read for failure */
605
if(bytes_read < 0){
606
perror_plus("read");
607
free(params.data);
608
params.data = NULL;
609
dhparamsfilename = NULL;
610
break;
611
}
612
params.size += (unsigned int)bytes_read;
613
}
614
if(params.data == NULL){
615
dhparamsfilename = NULL;
616
}
617
if(dhparamsfilename == NULL){
618
break;
619
}
620
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
621
GNUTLS_X509_FMT_PEM);
622
if(ret != GNUTLS_E_SUCCESS){
623
fprintf_plus(stderr, "Failed to parse DH parameters in file"
624
" \"%s\": %s\n", dhparamsfilename,
625
safer_gnutls_strerror(ret));
626
dhparamsfilename = NULL;
627
}
628
} while(false);
629
}
630
if(dhparamsfilename == NULL){
631
if(mc->dh_bits == 0){
632
/* Find out the optimal number of DH bits */
633
/* Try to read the private key file */
634
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
635
do {
636
int secfile = open(seckeyfilename, O_RDONLY);
637
if(secfile == -1){
638
perror_plus("open");
639
break;
640
}
641
size_t buffer_capacity = 0;
642
while(true){
643
buffer_capacity = incbuffer((char **)&buffer.data,
644
(size_t)buffer.size,
645
(size_t)buffer_capacity);
646
if(buffer_capacity == 0){
647
perror_plus("incbuffer");
648
free(buffer.data);
649
buffer.data = NULL;
650
break;
651
}
652
ssize_t bytes_read = read(secfile,
653
buffer.data + buffer.size,
654
BUFFER_SIZE);
655
/* EOF */
656
if(bytes_read == 0){
657
break;
658
}
659
/* check bytes_read for failure */
660
if(bytes_read < 0){
661
perror_plus("read");
662
free(buffer.data);
663
buffer.data = NULL;
664
break;
665
}
666
buffer.size += (unsigned int)bytes_read;
667
}
668
close(secfile);
669
} while(false);
670
/* If successful, use buffer to parse private key */
671
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
672
if(buffer.data != NULL){
673
{
674
gnutls_openpgp_privkey_t privkey = NULL;
675
ret = gnutls_openpgp_privkey_init(&privkey);
676
if(ret != GNUTLS_E_SUCCESS){
677
fprintf_plus(stderr, "Error initializing OpenPGP key"
678
" structure: %s",
679
safer_gnutls_strerror(ret));
680
free(buffer.data);
681
buffer.data = NULL;
682
} else {
683
ret = gnutls_openpgp_privkey_import
684
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
685
if(ret != GNUTLS_E_SUCCESS){
686
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
687
safer_gnutls_strerror(ret));
688
privkey = NULL;
689
}
690
free(buffer.data);
691
buffer.data = NULL;
692
if(privkey != NULL){
693
/* Use private key to suggest an appropriate
694
sec_param */
695
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
696
gnutls_openpgp_privkey_deinit(privkey);
697
if(debug){
698
fprintf_plus(stderr, "This OpenPGP key implies using"
699
" a GnuTLS security parameter \"%s\".\n",
700
safe_string(gnutls_sec_param_get_name
701
(sec_param)));
702
}
703
}
704
}
705
}
706
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
707
/* Err on the side of caution */
708
sec_param = GNUTLS_SEC_PARAM_ULTRA;
709
if(debug){
710
fprintf_plus(stderr, "Falling back to security parameter"
711
" \"%s\"\n",
712
safe_string(gnutls_sec_param_get_name
713
(sec_param)));
714
}
715
}
716
}
717
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
718
if(uret != 0){
719
mc->dh_bits = uret;
720
if(debug){
721
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
722
" implies %u DH bits; using that.\n",
723
safe_string(gnutls_sec_param_get_name
724
(sec_param)),
725
mc->dh_bits);
726
}
727
} else {
728
fprintf_plus(stderr, "Failed to get implied number of DH"
729
" bits for security parameter \"%s\"): %s\n",
730
safe_string(gnutls_sec_param_get_name
731
(sec_param)),
732
safer_gnutls_strerror(ret));
733
goto globalfail;
734
}
735
} else if(debug){
736
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
737
mc->dh_bits);
738
}
739
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
740
if(ret != GNUTLS_E_SUCCESS){
741
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
742
" bits): %s\n", mc->dh_bits,
743
safer_gnutls_strerror(ret));
744
goto globalfail;
745
}
746
}
565
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
566
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
568
safer_gnutls_strerror(ret));
569
goto globalfail;
570
}
571
747
572
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
748
573
749
574
return 0;
751
576
globalfail:
752
577
753
578
gnutls_certificate_free_credentials(mc->cred);
579
gnutls_global_deinit();
754
580
gnutls_dh_params_deinit(mc->dh_params);
755
581
return -1;
756
582
}
808
634
/* ignore client certificate if any. */
809
635
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
810
636
637
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
638
811
639
return 0;
812
640
}
813
641
815
643
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
816
644
__attribute__((unused)) const char *txt){}
817
645
818
/* Set effective uid to 0, return errno */
819
__attribute__((warn_unused_result))
820
int raise_privileges(void){
821
int old_errno = errno;
822
int ret = 0;
823
if(seteuid(0) == -1){
824
ret = errno;
825
}
826
errno = old_errno;
827
return ret;
828
}
829
830
/* Set effective and real user ID to 0. Return errno. */
831
__attribute__((warn_unused_result))
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
835
if(ret != 0){
836
errno = old_errno;
837
return ret;
838
}
839
if(setuid(0) == -1){
840
ret = errno;
841
}
842
errno = old_errno;
843
return ret;
844
}
845
846
/* Set effective user ID to unprivileged saved user ID */
847
__attribute__((warn_unused_result))
848
int lower_privileges(void){
849
int old_errno = errno;
850
int ret = 0;
851
if(seteuid(uid) == -1){
852
ret = errno;
853
}
854
errno = old_errno;
855
return ret;
856
}
857
858
/* Lower privileges permanently */
859
__attribute__((warn_unused_result))
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
862
int ret = 0;
863
if(setuid(uid) == -1){
864
ret = errno;
865
}
866
errno = old_errno;
867
return ret;
868
}
869
870
/* Helper function to add_local_route() and delete_local_route() */
871
__attribute__((nonnull, warn_unused_result))
872
static bool add_delete_local_route(const bool add,
873
const char *address,
874
AvahiIfIndex if_index){
875
int ret;
876
char helper[] = "mandos-client-iprouteadddel";
877
char add_arg[] = "add";
878
char delete_arg[] = "delete";
879
char debug_flag[] = "--debug";
880
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
881
if(pluginhelperdir == NULL){
882
if(debug){
883
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
884
" variable not set; cannot run helper\n");
885
}
886
return false;
887
}
888
889
char interface[IF_NAMESIZE];
890
if(if_indextoname((unsigned int)if_index, interface) == NULL){
891
perror_plus("if_indextoname");
892
return false;
893
}
894
895
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
896
if(devnull == -1){
897
perror_plus("open(\"/dev/null\", O_RDONLY)");
898
return false;
899
}
900
pid_t pid = fork();
901
if(pid == 0){
902
/* Child */
903
/* Raise privileges */
904
errno = raise_privileges_permanently();
905
if(errno != 0){
906
perror_plus("Failed to raise privileges");
907
/* _exit(EX_NOPERM); */
908
} else {
909
/* Set group */
910
errno = 0;
911
ret = setgid(0);
912
if(ret == -1){
913
perror_plus("setgid");
914
_exit(EX_NOPERM);
915
}
916
/* Reset supplementary groups */
917
errno = 0;
918
ret = setgroups(0, NULL);
919
if(ret == -1){
920
perror_plus("setgroups");
921
_exit(EX_NOPERM);
922
}
923
}
924
ret = dup2(devnull, STDIN_FILENO);
925
if(ret == -1){
926
perror_plus("dup2(devnull, STDIN_FILENO)");
927
_exit(EX_OSERR);
928
}
929
ret = close(devnull);
930
if(ret == -1){
931
perror_plus("close");
932
_exit(EX_OSERR);
933
}
934
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
935
if(ret == -1){
936
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
937
_exit(EX_OSERR);
938
}
939
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
940
O_RDONLY
941
| O_DIRECTORY
942
| O_PATH
943
| O_CLOEXEC));
944
if(helperdir_fd == -1){
945
perror_plus("open");
946
_exit(EX_UNAVAILABLE);
947
}
948
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
949
helper, O_RDONLY));
950
if(helper_fd == -1){
951
perror_plus("openat");
952
close(helperdir_fd);
953
_exit(EX_UNAVAILABLE);
954
}
955
close(helperdir_fd);
956
#ifdef __GNUC__
957
#pragma GCC diagnostic push
958
#pragma GCC diagnostic ignored "-Wcast-qual"
959
#endif
960
if(fexecve(helper_fd, (char *const [])
961
{ helper, add ? add_arg : delete_arg, (char *)address,
962
interface, debug ? debug_flag : NULL, NULL },
963
environ) == -1){
964
#ifdef __GNUC__
965
#pragma GCC diagnostic pop
966
#endif
967
perror_plus("fexecve");
968
_exit(EXIT_FAILURE);
969
}
970
}
971
if(pid == -1){
972
perror_plus("fork");
973
return false;
974
}
975
int status;
976
pid_t pret = -1;
977
errno = 0;
978
do {
979
pret = waitpid(pid, &status, 0);
980
if(pret == -1 and errno == EINTR and quit_now){
981
int errno_raising = 0;
982
if((errno = raise_privileges()) != 0){
983
errno_raising = errno;
984
perror_plus("Failed to raise privileges in order to"
985
" kill helper program");
986
}
987
if(kill(pid, SIGTERM) == -1){
988
perror_plus("kill");
989
}
990
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
991
perror_plus("Failed to lower privileges after killing"
992
" helper program");
993
}
994
return false;
995
}
996
} while(pret == -1 and errno == EINTR);
997
if(pret == -1){
998
perror_plus("waitpid");
999
return false;
1000
}
1001
if(WIFEXITED(status)){
1002
if(WEXITSTATUS(status) != 0){
1003
fprintf_plus(stderr, "Error: iprouteadddel exited"
1004
" with status %d\n", WEXITSTATUS(status));
1005
return false;
1006
}
1007
return true;
1008
}
1009
if(WIFSIGNALED(status)){
1010
fprintf_plus(stderr, "Error: iprouteadddel died by"
1011
" signal %d\n", WTERMSIG(status));
1012
return false;
1013
}
1014
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1015
return false;
1016
}
1017
1018
__attribute__((nonnull, warn_unused_result))
1019
static bool add_local_route(const char *address,
1020
AvahiIfIndex if_index){
1021
if(debug){
1022
fprintf_plus(stderr, "Adding route to %s\n", address);
1023
}
1024
return add_delete_local_route(true, address, if_index);
1025
}
1026
1027
__attribute__((nonnull, warn_unused_result))
1028
static bool delete_local_route(const char *address,
1029
AvahiIfIndex if_index){
1030
if(debug){
1031
fprintf_plus(stderr, "Removing route to %s\n", address);
1032
}
1033
return add_delete_local_route(false, address, if_index);
1034
}
1035
1036
646
/* Called when a Mandos server is found */
1037
647
__attribute__((nonnull, warn_unused_result))
1038
648
static int start_mandos_communication(const char *ip, in_port_t port,
1049
659
int retval = -1;
1050
660
gnutls_session_t session;
1051
661
int pf; /* Protocol family */
1052
bool route_added = false;
1053
662
1054
663
errno = 0;
1055
664
1113
722
PRIuMAX "\n", ip, (uintmax_t)port);
1114
723
}
1115
724
1116
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
725
tcp_sd = socket(pf, SOCK_STREAM, 0);
1117
726
if(tcp_sd < 0){
1118
727
int e = errno;
1119
728
perror_plus("socket");
1126
735
goto mandos_end;
1127
736
}
1128
737
738
memset(&to, 0, sizeof(to));
1129
739
if(af == AF_INET6){
1130
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1131
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1132
ret = inet_pton(af, ip, &to6->sin6_addr);
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1133
742
} else { /* IPv4 */
1134
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1135
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to4->sin_addr);
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1137
745
}
1138
746
if(ret < 0 ){
1139
747
int e = errno;
1209
817
goto mandos_end;
1210
818
}
1211
819
1212
while(true){
1213
if(af == AF_INET6){
1214
ret = connect(tcp_sd, (struct sockaddr *)&to,
1215
sizeof(struct sockaddr_in6));
1216
} else {
1217
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1218
sizeof(struct sockaddr_in));
1219
}
1220
if(ret < 0){
1221
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1222
and if_index != AVAHI_IF_UNSPEC
1223
and connect_to == NULL
1224
and not route_added and
1225
((af == AF_INET6 and not
1226
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1227
&to)->sin6_addr)))
1228
or (af == AF_INET and
1229
/* Not a a IPv4LL address */
1230
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1231
& 0xFFFF0000L) != 0xA9FE0000L))){
1232
/* Work around Avahi bug - Avahi does not announce link-local
1233
addresses if it has a global address, so local hosts with
1234
*only* a link-local address (e.g. Mandos clients) cannot
1235
connect to a Mandos server announced by Avahi on a server
1236
host with a global address. Work around this by retrying
1237
with an explicit route added with the server's address.
1238
1239
Avahi bug reference:
1240
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1241
https://bugs.debian.org/587961
1242
*/
1243
if(debug){
1244
fprintf_plus(stderr, "Mandos server unreachable, trying"
1245
" direct route\n");
1246
}
1247
int e = errno;
1248
route_added = add_local_route(ip, if_index);
1249
if(route_added){
1250
continue;
1251
}
1252
errno = e;
1253
}
1254
if(errno != ECONNREFUSED or debug){
1255
int e = errno;
1256
perror_plus("connect");
1257
errno = e;
1258
}
1259
goto mandos_end;
1260
}
1261
1262
if(quit_now){
1263
errno = EINTR;
1264
goto mandos_end;
1265
}
1266
break;
820
if(af == AF_INET6){
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
823
} else {
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
826
}
827
if(ret < 0){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
829
int e = errno;
830
perror_plus("connect");
831
errno = e;
832
}
833
goto mandos_end;
834
}
835
836
if(quit_now){
837
errno = EINTR;
838
goto mandos_end;
1267
839
}
1268
840
1269
841
const char *out = mandos_protocol_version;
1452
1024
1453
1025
mandos_end:
1454
1026
{
1455
if(route_added){
1456
if(not delete_local_route(ip, if_index)){
1457
fprintf_plus(stderr, "Failed to delete local route to %s on"
1458
" interface %d", ip, if_index);
1459
}
1460
}
1461
1027
int e = errno;
1462
1028
free(decrypted_buffer);
1463
1029
free(buffer);
1464
1030
if(tcp_sd >= 0){
1465
ret = close(tcp_sd);
1031
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1466
1032
}
1467
1033
if(ret == -1){
1468
1034
if(e == 0){
1503
1069
timed out */
1504
1070
1505
1071
if(quit_now){
1506
avahi_s_service_resolver_free(r);
1507
1072
return;
1508
1073
}
1509
1074
1623
1188
__attribute__((nonnull, warn_unused_result))
1624
1189
bool get_flags(const char *ifname, struct ifreq *ifr){
1625
1190
int ret;
1626
int old_errno;
1191
error_t ret_errno;
1627
1192
1628
1193
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1629
1194
if(s < 0){
1630
old_errno = errno;
1195
ret_errno = errno;
1631
1196
perror_plus("socket");
1632
errno = old_errno;
1197
errno = ret_errno;
1633
1198
return false;
1634
1199
}
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1636
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1200
strcpy(ifr->ifr_name, ifname);
1637
1201
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1638
1202
if(ret == -1){
1639
1203
if(debug){
1640
old_errno = errno;
1204
ret_errno = errno;
1641
1205
perror_plus("ioctl SIOCGIFFLAGS");
1642
errno = old_errno;
1206
errno = ret_errno;
1643
1207
}
1644
1208
return false;
1645
1209
}
1890
1454
}
1891
1455
}
1892
1456
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
error_t raise_privileges(void){
1460
error_t old_errno = errno;
1461
error_t ret_errno = 0;
1462
if(seteuid(0) == -1){
1463
ret_errno = errno;
1464
}
1465
errno = old_errno;
1466
return ret_errno;
1467
}
1468
1469
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1471
error_t raise_privileges_permanently(void){
1472
error_t old_errno = errno;
1473
error_t ret_errno = raise_privileges();
1474
if(ret_errno != 0){
1475
errno = old_errno;
1476
return ret_errno;
1477
}
1478
if(setuid(0) == -1){
1479
ret_errno = errno;
1480
}
1481
errno = old_errno;
1482
return ret_errno;
1483
}
1484
1485
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1487
error_t lower_privileges(void){
1488
error_t old_errno = errno;
1489
error_t ret_errno = 0;
1490
if(seteuid(uid) == -1){
1491
ret_errno = errno;
1492
}
1493
errno = old_errno;
1494
return ret_errno;
1495
}
1496
1497
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1499
error_t lower_privileges_permanently(void){
1500
error_t old_errno = errno;
1501
error_t ret_errno = 0;
1502
if(setuid(uid) == -1){
1503
ret_errno = errno;
1504
}
1505
errno = old_errno;
1506
return ret_errno;
1507
}
1508
1893
1509
__attribute__((nonnull))
1894
1510
void run_network_hooks(const char *mode, const char *interface,
1895
1511
const float delay){
1896
1512
struct dirent **direntries = NULL;
1897
1513
if(hookdir_fd == -1){
1898
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1899
| O_CLOEXEC);
1514
hookdir_fd = open(hookdir, O_RDONLY);
1900
1515
if(hookdir_fd == -1){
1901
1516
if(errno == ENOENT){
1902
1517
if(debug){
1909
1524
return;
1910
1525
}
1911
1526
}
1527
#ifdef __GLIBC__
1528
#if __GLIBC_PREREQ(2, 15)
1912
1529
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1913
1530
runnable_hook, alphasort);
1531
#else /* not __GLIBC_PREREQ(2, 15) */
1532
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1533
alphasort);
1534
#endif /* not __GLIBC_PREREQ(2, 15) */
1535
#else /* not __GLIBC__ */
1536
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1537
alphasort);
1538
#endif /* not __GLIBC__ */
1914
1539
if(numhooks == -1){
1915
1540
perror_plus("scandir");
1916
1541
return;
1917
1542
}
1918
1543
struct dirent *direntry;
1919
1544
int ret;
1920
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1921
if(devnull == -1){
1922
perror_plus("open(\"/dev/null\", O_RDONLY)");
1923
return;
1924
}
1545
int devnull = open("/dev/null", O_RDONLY);
1925
1546
for(int i = 0; i < numhooks; i++){
1926
1547
direntry = direntries[i];
1927
1548
if(debug){
1951
1572
perror_plus("setgroups");
1952
1573
_exit(EX_NOPERM);
1953
1574
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1954
1590
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1955
1591
if(ret == -1){
1956
1592
perror_plus("setenv");
1991
1627
_exit(EX_OSERR);
1992
1628
}
1993
1629
}
1994
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
1995
direntry->d_name,
1996
O_RDONLY));
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1997
1631
if(hook_fd == -1){
1998
1632
perror_plus("openat");
1999
1633
_exit(EXIT_FAILURE);
2000
1634
}
2001
if(close(hookdir_fd) == -1){
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2002
1636
perror_plus("close");
2003
1637
_exit(EXIT_FAILURE);
2004
1638
}
2005
ret = dup2(devnull, STDIN_FILENO);
2006
if(ret == -1){
2007
perror_plus("dup2(devnull, STDIN_FILENO)");
2008
_exit(EX_OSERR);
2009
}
2010
ret = close(devnull);
2011
if(ret == -1){
2012
perror_plus("close");
2013
_exit(EX_OSERR);
2014
}
2015
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2016
if(ret == -1){
2017
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2018
_exit(EX_OSERR);
2019
}
2020
1639
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2021
1640
environ) == -1){
2022
1641
perror_plus("fexecve");
2023
1642
_exit(EXIT_FAILURE);
2024
1643
}
2025
1644
} else {
2026
if(hook_pid == -1){
2027
perror_plus("fork");
2028
free(direntry);
2029
continue;
2030
}
2031
1645
int status;
2032
1646
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2033
1647
perror_plus("waitpid");
2034
free(direntry);
2035
1648
continue;
2036
1649
}
2037
1650
if(WIFEXITED(status)){
2039
1652
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2040
1653
" with status %d\n", direntry->d_name,
2041
1654
WEXITSTATUS(status));
2042
free(direntry);
2043
1655
continue;
2044
1656
}
2045
1657
} else if(WIFSIGNALED(status)){
2046
1658
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2047
1659
" signal %d\n", direntry->d_name,
2048
1660
WTERMSIG(status));
2049
free(direntry);
2050
1661
continue;
2051
1662
} else {
2052
1663
fprintf_plus(stderr, "Warning: network hook \"%s\""
2053
1664
" crashed\n", direntry->d_name);
2054
free(direntry);
2055
1665
continue;
2056
1666
}
2057
1667
}
2059
1669
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2060
1670
direntry->d_name);
2061
1671
}
2062
free(direntry);
2063
1672
}
2064
1673
free(direntries);
2065
if(close(hookdir_fd) == -1){
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2066
1675
perror_plus("close");
2067
1676
} else {
2068
1677
hookdir_fd = -1;
2071
1680
}
2072
1681
2073
1682
__attribute__((nonnull, warn_unused_result))
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
1683
error_t bring_up_interface(const char *const interface,
1684
const float delay){
1685
error_t old_errno = errno;
2077
1686
int ret;
2078
1687
struct ifreq network;
2079
1688
unsigned int if_index = if_nametoindex(interface);
2089
1698
}
2090
1699
2091
1700
if(not interface_is_up(interface)){
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
1701
error_t ret_errno = 0, ioctl_errno = 0;
2094
1702
if(not get_flags(interface, &network)){
2095
1703
ret_errno = errno;
2096
1704
fprintf_plus(stderr, "Failed to get flags for interface "
2109
1717
}
2110
1718
2111
1719
if(quit_now){
2112
ret = close(sd);
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2113
1721
if(ret == -1){
2114
1722
perror_plus("close");
2115
1723
}
2165
1773
}
2166
1774
2167
1775
/* Close the socket */
2168
ret = close(sd);
1776
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2169
1777
if(ret == -1){
2170
1778
perror_plus("close");
2171
1779
}
2199
1807
}
2200
1808
2201
1809
__attribute__((nonnull, warn_unused_result))
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
1810
error_t take_down_interface(const char *const interface){
1811
error_t old_errno = errno;
2204
1812
struct ifreq network;
2205
1813
unsigned int if_index = if_nametoindex(interface);
2206
1814
if(if_index == 0){
2209
1817
return ENXIO;
2210
1818
}
2211
1819
if(interface_is_up(interface)){
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
1820
error_t ret_errno = 0, ioctl_errno = 0;
2214
1821
if(not get_flags(interface, &network) and debug){
2215
1822
ret_errno = errno;
2216
1823
fprintf_plus(stderr, "Failed to get flags for interface "
2254
1861
}
2255
1862
2256
1863
/* Close the socket */
2257
int ret = close(sd);
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2258
1865
if(ret == -1){
2259
1866
perror_plus("close");
2260
1867
}
2275
1882
}
2276
1883
2277
1884
int main(int argc, char *argv[]){
2278
mandos_context mc = { .server = NULL, .dh_bits = 0,
2279
.priority = "SECURE256:!CTYPE-X.509"
2280
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2281
.current_server = NULL, .interfaces = NULL,
2282
.interfaces_size = 0 };
1885
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1886
.priority = "SECURE256:!CTYPE-X.509:"
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1888
.interfaces = NULL, .interfaces_size = 0 };
2283
1889
AvahiSServiceBrowser *sb = NULL;
2284
1890
error_t ret_errno;
2285
1891
int ret;
2294
1900
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2295
1901
const char *seckey = PATHDIR "/" SECKEY;
2296
1902
const char *pubkey = PATHDIR "/" PUBKEY;
2297
const char *dh_params_file = NULL;
2298
1903
char *interfaces_hooks = NULL;
2299
1904
2300
1905
bool gnutls_initialized = false;
2353
1958
.doc = "Bit length of the prime number used in the"
2354
1959
" Diffie-Hellman key exchange",
2355
1960
.group = 2 },
2356
{ .name = "dh-params", .key = 134,
2357
.arg = "FILE",
2358
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2359
" for the Diffie-Hellman key exchange",
2360
.group = 2 },
2361
1961
{ .name = "priority", .key = 130,
2362
1962
.arg = "STRING",
2363
1963
.doc = "GnuTLS priority string for the TLS handshake",
2418
2018
}
2419
2019
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2420
2020
break;
2421
case 134: /* --dh-params */
2422
dh_params_file = arg;
2423
break;
2424
2021
case 130: /* --priority */
2425
2022
mc.priority = arg;
2426
2023
break;
2466
2063
.args_doc = "",
2467
2064
.doc = "Mandos client -- Get and decrypt"
2468
2065
" passwords from a Mandos server" };
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2066
ret = argp_parse(&argp, argc, argv,
2067
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2068
switch(ret){
2472
2069
case 0:
2473
2070
break;
2474
2071
case ENOMEM:
2475
2072
default:
2476
errno = ret_errno;
2073
errno = ret;
2477
2074
perror_plus("argp_parse");
2478
2075
exitcode = EX_OSERR;
2479
2076
goto end;
2482
2079
goto end;
2483
2080
}
2484
2081
}
2485
2082
2486
2083
{
2487
2084
/* Work around Debian bug #633582:
2488
2085
<http://bugs.debian.org/633582> */
2489
2086
2490
2087
/* Re-raise privileges */
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2088
ret_errno = raise_privileges();
2089
if(ret_errno != 0){
2090
errno = ret_errno;
2494
2091
perror_plus("Failed to raise privileges");
2495
2092
} else {
2496
2093
struct stat st;
2512
2109
}
2513
2110
}
2514
2111
}
2515
close(seckey_fd);
2112
TEMP_FAILURE_RETRY(close(seckey_fd));
2516
2113
}
2517
2114
}
2518
2115
2519
2116
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2520
2117
int pubkey_fd = open(pubkey, O_RDONLY);
2521
2118
if(pubkey_fd == -1){
2533
2130
}
2534
2131
}
2535
2132
}
2536
close(pubkey_fd);
2537
}
2538
}
2539
2540
if(dh_params_file != NULL
2541
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2542
int dhparams_fd = open(dh_params_file, O_RDONLY);
2543
if(dhparams_fd == -1){
2544
perror_plus("open");
2545
} else {
2546
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2547
if(ret == -1){
2548
perror_plus("fstat");
2549
} else {
2550
if(S_ISREG(st.st_mode)
2551
and st.st_uid == 0 and st.st_gid == 0){
2552
ret = fchown(dhparams_fd, uid, gid);
2553
if(ret == -1){
2554
perror_plus("fchown");
2555
}
2556
}
2557
}
2558
close(dhparams_fd);
2559
}
2560
}
2561
2133
TEMP_FAILURE_RETRY(close(pubkey_fd));
2134
}
2135
}
2136
2562
2137
/* Lower privileges */
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2566
2141
perror_plus("Failed to lower privileges");
2567
2142
}
2568
2143
}
2693
2268
if(ret_errno != 0){
2694
2269
errno = ret_errno;
2695
2270
perror_plus("argz_add");
2696
free(direntries[i]);
2697
2271
continue;
2698
2272
}
2699
2273
if(debug){
2700
2274
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2701
2275
direntries[i]->d_name);
2702
2276
}
2703
free(direntries[i]);
2704
2277
}
2705
2278
free(direntries);
2706
2279
} else {
2738
2311
errno = bring_up_interface(interface, delay);
2739
2312
if(not interface_was_up){
2740
2313
if(errno != 0){
2741
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2742
" %s\n", interface, strerror(errno));
2314
perror_plus("Failed to bring up interface");
2743
2315
} else {
2744
2316
errno = argz_add(&interfaces_to_take_down,
2745
2317
&interfaces_to_take_down_size,
2768
2340
goto end;
2769
2341
}
2770
2342
2771
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2343
ret = init_gnutls_global(pubkey, seckey, &mc);
2772
2344
if(ret == -1){
2773
2345
fprintf_plus(stderr, "init_gnutls_global failed\n");
2774
2346
exitcode = EX_UNAVAILABLE;
2896
2468
2897
2469
/* Allocate a new server */
2898
2470
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2899
&config, NULL, NULL, &ret);
2471
&config, NULL, NULL, &ret_errno);
2900
2472
2901
2473
/* Free the Avahi configuration data */
2902
2474
avahi_server_config_free(&config);
2905
2477
/* Check if creating the Avahi server object succeeded */
2906
2478
if(mc.server == NULL){
2907
2479
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2908
avahi_strerror(ret));
2480
avahi_strerror(ret_errno));
2909
2481
exitcode = EX_UNAVAILABLE;
2910
2482
goto end;
2911
2483
}
2963
2535
2964
2536
if(gnutls_initialized){
2965
2537
gnutls_certificate_free_credentials(mc.cred);
2538
gnutls_global_deinit();
2966
2539
gnutls_dh_params_deinit(mc.dh_params);
2967
2540
}
2968
2541
2976
2549
mc.current_server->prev->next = NULL;
2977
2550
while(mc.current_server != NULL){
2978
2551
server *next = mc.current_server->next;
2979
#ifdef __GNUC__
2980
#pragma GCC diagnostic push
2981
#pragma GCC diagnostic ignored "-Wcast-qual"
2982
#endif
2983
free((char *)(mc.current_server->ip));
2984
#ifdef __GNUC__
2985
#pragma GCC diagnostic pop
2986
#endif
2987
2552
free(mc.current_server);
2988
2553
mc.current_server = next;
2989
2554
}
2991
2556
2992
2557
/* Re-raise privileges */
2993
2558
{
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
2559
ret_errno = raise_privileges();
2560
if(ret_errno != 0){
2561
errno = ret_errno;
2997
2562
perror_plus("Failed to raise privileges");
2998
2563
} else {
2999
2564
3007
2572
while((interface=argz_next(interfaces_to_take_down,
3008
2573
interfaces_to_take_down_size,
3009
2574
interface))){
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
2575
ret_errno = take_down_interface(interface);
2576
if(ret_errno != 0){
2577
errno = ret_errno;
3013
2578
perror_plus("Failed to take down interface");
3014
2579
}
3015
2580
}
3020
2585
}
3021
2586
}
3022
2587
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
2588
ret_errno = lower_privileges_permanently();
2589
if(ret_errno != 0){
2590
errno = ret_errno;
3026
2591
perror_plus("Failed to lower privileges permanently");
3027
2592
}
3028
2593
}
3030
2595
free(interfaces_to_take_down);
3031
2596
free(interfaces_hooks);
3032
2597
3033
void clean_dir_at(int base, const char * const dirname,
3034
uintmax_t level){
3035
struct dirent **direntries = NULL;
3036
int dret;
3037
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3038
O_RDONLY
3039
| O_NOFOLLOW
3040
| O_DIRECTORY
3041
| O_PATH));
3042
if(dir_fd == -1){
3043
perror_plus("open");
3044
}
3045
int numentries = scandirat(dir_fd, ".", &direntries,
3046
notdotentries, alphasort);
3047
if(numentries >= 0){
3048
for(int i = 0; i < numentries; i++){
3049
if(debug){
3050
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3051
dirname, direntries[i]->d_name);
3052
}
3053
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3054
if(dret == -1){
3055
if(errno == EISDIR){
3056
dret = unlinkat(dir_fd, direntries[i]->d_name,
3057
AT_REMOVEDIR);
3058
}
3059
if((dret == -1) and (errno == ENOTEMPTY)
3060
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3061
== 0) and (level == 0)){
3062
/* Recurse only in this special case */
3063
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3064
dret = 0;
3065
}
3066
if(dret == -1){
3067
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3068
direntries[i]->d_name, strerror(errno));
3069
}
3070
}
3071
free(direntries[i]);
3072
}
3073
3074
/* need to clean even if 0 because man page doesn't specify */
3075
free(direntries);
3076
if(numentries == -1){
3077
perror_plus("scandirat");
3078
}
3079
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3080
if(dret == -1 and errno != ENOENT){
3081
perror_plus("rmdir");
3082
}
3083
} else {
3084
perror_plus("scandirat");
3085
}
3086
close(dir_fd);
3087
}
3088
3089
2598
/* Removes the GPGME temp directory and all files inside */
3090
2599
if(tempdir != NULL){
3091
clean_dir_at(-1, tempdir, 0);
2600
struct dirent **direntries = NULL;
2601
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2602
O_NOFOLLOW));
2603
if(tempdir_fd == -1){
2604
perror_plus("open");
2605
} else {
2606
#ifdef __GLIBC__
2607
#if __GLIBC_PREREQ(2, 15)
2608
int numentries = scandirat(tempdir_fd, ".", &direntries,
2609
notdotentries, alphasort);
2610
#else /* not __GLIBC_PREREQ(2, 15) */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC_PREREQ(2, 15) */
2614
#else /* not __GLIBC__ */
2615
int numentries = scandir(tempdir, &direntries, notdotentries,
2616
alphasort);
2617
#endif /* not __GLIBC__ */
2618
if(numentries >= 0){
2619
for(int i = 0; i < numentries; i++){
2620
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2621
if(ret == -1){
2622
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2623
" \"%s\", 0): %s\n", tempdir,
2624
direntries[i]->d_name, strerror(errno));
2625
}
2626
}
2627
2628
/* need to clean even if 0 because man page doesn't specify */
2629
free(direntries);
2630
if(numentries == -1){
2631
perror_plus("scandir");
2632
}
2633
ret = rmdir(tempdir);
2634
if(ret == -1 and errno != ENOENT){
2635
perror_plus("rmdir");
2636
}
2637
}
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
2639
}
3092
2640
}
3093
2641
3094
2642
if(quit_now){
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Version: 2.0.2.dev0