To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 237.23.1
- compare with another revision
- download diff
- download tarball
- view history from revision 237.23.1
- Committer: Teddy Hogeborn
- Date: 2014-07-25 22:44:20 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 321.
- Revision ID: teddy@recompile.se-20140725224420-4a5ct2ptt0hsc92z
Require Python 2.7.
This is in preparation for the eventual move to Python 3, which will
happen as soon as all Python modules required by Mandos are available.
The mandos-ctl and mandos-monitor programs are already portable
between Python 2.6 and Python 3 without changes; this change will
bring the requirement up to Python 2.7.
* INSTALL (Prerequisites/Libraries/Mandos Server): Document
requirement of
Python 2.7; remove
Python-argparse
which is in the
Python 2.7 standard
library.
* debian/control (Source: mandos/Build-Depends-Indep): Depend on
exactly the
python2.7
package and all
the Python 2.7
versions of the
python modules.
(Package: mandos/Depends): - '' - but still depend on python (<=2.7)
and the generic versions of the Python
modules; this is for mandos-ctl and
mandos-monitor, both of which are
compatible with Python 3, and use
#!/usr/bin/python.
* mandos: Use #!/usr/bin/python2.7 instead of #!/usr/bin/python.
This is in preparation for the eventual move to Python 3, which will
happen as soon as all Python modules required by Mandos are available.
The mandos-ctl and mandos-monitor programs are already portable
between Python 2.6 and Python 3 without changes; this change will
bring the requirement up to Python 2.7.
* INSTALL (Prerequisites/Libraries/Mandos Server): Document
requirement of
Python 2.7; remove
Python-argparse
which is in the
Python 2.7 standard
library.
* debian/control (Source: mandos/Build-Depends-Indep): Depend on
exactly the
python2.7
package and all
the Python 2.7
versions of the
python modules.
(Package: mandos/Depends): - '' - but still depend on python (<=2.7)
and the generic versions of the Python
modules; this is for mandos-ctl and
mandos-monitor, both of which are
compatible with Python 3, and use
#!/usr/bin/python.
* mandos: Use #!/usr/bin/python2.7 instead of #!/usr/bin/python.
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(), 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(), unlinkat() */
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,
310
305
return false;
311
306
}
312
307
313
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
314
309
if(ret == -1){
315
310
perror_plus("close");
316
311
}
498
493
return plaintext_length;
499
494
}
500
495
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
496
__attribute__((warn_unused_result))
509
497
static const char *safer_gnutls_strerror(int value){
510
498
const char *ret = gnutls_strerror(value);
511
return safe_string(ret);
499
if(ret == NULL)
500
ret = "(unknown)";
501
return ret;
512
502
}
513
503
514
504
/* GnuTLS log function callback */
518
508
fprintf_plus(stderr, "GnuTLS: %s", string);
519
509
}
520
510
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
511
__attribute__((nonnull, warn_unused_result))
522
512
static int init_gnutls_global(const char *pubkeyfilename,
523
513
const char *seckeyfilename,
524
const char *dhparamsfilename,
525
514
mandos_context *mc){
526
515
int ret;
527
unsigned int uret;
528
516
529
517
if(debug){
530
518
fprintf_plus(stderr, "Initializing GnuTLS\n");
531
519
}
532
520
521
ret = gnutls_global_init();
522
if(ret != GNUTLS_E_SUCCESS){
523
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
524
safer_gnutls_strerror(ret));
525
return -1;
526
}
527
533
528
if(debug){
534
529
/* "Use a log level over 10 to enable all debugging options."
535
530
* - GnuTLS manual
543
538
if(ret != GNUTLS_E_SUCCESS){
544
539
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
545
540
safer_gnutls_strerror(ret));
541
gnutls_global_deinit();
546
542
return -1;
547
543
}
548
544
573
569
safer_gnutls_strerror(ret));
574
570
goto globalfail;
575
571
}
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
free(params.data);
630
} while(false);
631
}
632
if(dhparamsfilename == NULL){
633
if(mc->dh_bits == 0){
634
/* Find out the optimal number of DH bits */
635
/* Try to read the private key file */
636
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
637
do {
638
int secfile = open(seckeyfilename, O_RDONLY);
639
if(secfile == -1){
640
perror_plus("open");
641
break;
642
}
643
size_t buffer_capacity = 0;
644
while(true){
645
buffer_capacity = incbuffer((char **)&buffer.data,
646
(size_t)buffer.size,
647
(size_t)buffer_capacity);
648
if(buffer_capacity == 0){
649
perror_plus("incbuffer");
650
free(buffer.data);
651
buffer.data = NULL;
652
break;
653
}
654
ssize_t bytes_read = read(secfile,
655
buffer.data + buffer.size,
656
BUFFER_SIZE);
657
/* EOF */
658
if(bytes_read == 0){
659
break;
660
}
661
/* check bytes_read for failure */
662
if(bytes_read < 0){
663
perror_plus("read");
664
free(buffer.data);
665
buffer.data = NULL;
666
break;
667
}
668
buffer.size += (unsigned int)bytes_read;
669
}
670
close(secfile);
671
} while(false);
672
/* If successful, use buffer to parse private key */
673
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
674
if(buffer.data != NULL){
675
{
676
gnutls_openpgp_privkey_t privkey = NULL;
677
ret = gnutls_openpgp_privkey_init(&privkey);
678
if(ret != GNUTLS_E_SUCCESS){
679
fprintf_plus(stderr, "Error initializing OpenPGP key"
680
" structure: %s",
681
safer_gnutls_strerror(ret));
682
free(buffer.data);
683
buffer.data = NULL;
684
} else {
685
ret = gnutls_openpgp_privkey_import
686
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
687
if(ret != GNUTLS_E_SUCCESS){
688
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
689
safer_gnutls_strerror(ret));
690
privkey = NULL;
691
}
692
free(buffer.data);
693
buffer.data = NULL;
694
if(privkey != NULL){
695
/* Use private key to suggest an appropriate
696
sec_param */
697
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
698
gnutls_openpgp_privkey_deinit(privkey);
699
if(debug){
700
fprintf_plus(stderr, "This OpenPGP key implies using"
701
" a GnuTLS security parameter \"%s\".\n",
702
safe_string(gnutls_sec_param_get_name
703
(sec_param)));
704
}
705
}
706
}
707
}
708
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
709
/* Err on the side of caution */
710
sec_param = GNUTLS_SEC_PARAM_ULTRA;
711
if(debug){
712
fprintf_plus(stderr, "Falling back to security parameter"
713
" \"%s\"\n",
714
safe_string(gnutls_sec_param_get_name
715
(sec_param)));
716
}
717
}
718
}
719
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
720
if(uret != 0){
721
mc->dh_bits = uret;
722
if(debug){
723
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
724
" implies %u DH bits; using that.\n",
725
safe_string(gnutls_sec_param_get_name
726
(sec_param)),
727
mc->dh_bits);
728
}
729
} else {
730
fprintf_plus(stderr, "Failed to get implied number of DH"
731
" bits for security parameter \"%s\"): %s\n",
732
safe_string(gnutls_sec_param_get_name
733
(sec_param)),
734
safer_gnutls_strerror(ret));
735
goto globalfail;
736
}
737
} else if(debug){
738
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
739
mc->dh_bits);
740
}
741
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
742
if(ret != GNUTLS_E_SUCCESS){
743
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
744
" bits): %s\n", mc->dh_bits,
745
safer_gnutls_strerror(ret));
746
goto globalfail;
747
}
748
}
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
573
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
575
safer_gnutls_strerror(ret));
576
goto globalfail;
577
}
578
749
579
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
750
580
751
581
return 0;
753
583
globalfail:
754
584
755
585
gnutls_certificate_free_credentials(mc->cred);
586
gnutls_global_deinit();
756
587
gnutls_dh_params_deinit(mc->dh_params);
757
588
return -1;
758
589
}
810
641
/* ignore client certificate if any. */
811
642
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
812
643
644
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
645
813
646
return 0;
814
647
}
815
648
817
650
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
818
651
__attribute__((unused)) const char *txt){}
819
652
820
/* Set effective uid to 0, return errno */
821
__attribute__((warn_unused_result))
822
int raise_privileges(void){
823
int old_errno = errno;
824
int ret = 0;
825
if(seteuid(0) == -1){
826
ret = errno;
827
}
828
errno = old_errno;
829
return ret;
830
}
831
832
/* Set effective and real user ID to 0. Return errno. */
833
__attribute__((warn_unused_result))
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
837
if(ret != 0){
838
errno = old_errno;
839
return ret;
840
}
841
if(setuid(0) == -1){
842
ret = errno;
843
}
844
errno = old_errno;
845
return ret;
846
}
847
848
/* Set effective user ID to unprivileged saved user ID */
849
__attribute__((warn_unused_result))
850
int lower_privileges(void){
851
int old_errno = errno;
852
int ret = 0;
853
if(seteuid(uid) == -1){
854
ret = errno;
855
}
856
errno = old_errno;
857
return ret;
858
}
859
860
/* Lower privileges permanently */
861
__attribute__((warn_unused_result))
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
864
int ret = 0;
865
if(setuid(uid) == -1){
866
ret = errno;
867
}
868
errno = old_errno;
869
return ret;
870
}
871
872
/* Helper function to add_local_route() and delete_local_route() */
873
__attribute__((nonnull, warn_unused_result))
874
static bool add_delete_local_route(const bool add,
875
const char *address,
876
AvahiIfIndex if_index){
877
int ret;
878
char helper[] = "mandos-client-iprouteadddel";
879
char add_arg[] = "add";
880
char delete_arg[] = "delete";
881
char debug_flag[] = "--debug";
882
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
883
if(pluginhelperdir == NULL){
884
if(debug){
885
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
886
" variable not set; cannot run helper\n");
887
}
888
return false;
889
}
890
891
char interface[IF_NAMESIZE];
892
if(if_indextoname((unsigned int)if_index, interface) == NULL){
893
perror_plus("if_indextoname");
894
return false;
895
}
896
897
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
898
if(devnull == -1){
899
perror_plus("open(\"/dev/null\", O_RDONLY)");
900
return false;
901
}
902
pid_t pid = fork();
903
if(pid == 0){
904
/* Child */
905
/* Raise privileges */
906
errno = raise_privileges_permanently();
907
if(errno != 0){
908
perror_plus("Failed to raise privileges");
909
/* _exit(EX_NOPERM); */
910
} else {
911
/* Set group */
912
errno = 0;
913
ret = setgid(0);
914
if(ret == -1){
915
perror_plus("setgid");
916
_exit(EX_NOPERM);
917
}
918
/* Reset supplementary groups */
919
errno = 0;
920
ret = setgroups(0, NULL);
921
if(ret == -1){
922
perror_plus("setgroups");
923
_exit(EX_NOPERM);
924
}
925
}
926
ret = dup2(devnull, STDIN_FILENO);
927
if(ret == -1){
928
perror_plus("dup2(devnull, STDIN_FILENO)");
929
_exit(EX_OSERR);
930
}
931
ret = close(devnull);
932
if(ret == -1){
933
perror_plus("close");
934
_exit(EX_OSERR);
935
}
936
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
937
if(ret == -1){
938
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
939
_exit(EX_OSERR);
940
}
941
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
942
O_RDONLY
943
| O_DIRECTORY
944
| O_PATH
945
| O_CLOEXEC));
946
if(helperdir_fd == -1){
947
perror_plus("open");
948
_exit(EX_UNAVAILABLE);
949
}
950
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
951
helper, O_RDONLY));
952
if(helper_fd == -1){
953
perror_plus("openat");
954
close(helperdir_fd);
955
_exit(EX_UNAVAILABLE);
956
}
957
close(helperdir_fd);
958
#ifdef __GNUC__
959
#pragma GCC diagnostic push
960
#pragma GCC diagnostic ignored "-Wcast-qual"
961
#endif
962
if(fexecve(helper_fd, (char *const [])
963
{ helper, add ? add_arg : delete_arg, (char *)address,
964
interface, debug ? debug_flag : NULL, NULL },
965
environ) == -1){
966
#ifdef __GNUC__
967
#pragma GCC diagnostic pop
968
#endif
969
perror_plus("fexecve");
970
_exit(EXIT_FAILURE);
971
}
972
}
973
if(pid == -1){
974
perror_plus("fork");
975
return false;
976
}
977
int status;
978
pid_t pret = -1;
979
errno = 0;
980
do {
981
pret = waitpid(pid, &status, 0);
982
if(pret == -1 and errno == EINTR and quit_now){
983
int errno_raising = 0;
984
if((errno = raise_privileges()) != 0){
985
errno_raising = errno;
986
perror_plus("Failed to raise privileges in order to"
987
" kill helper program");
988
}
989
if(kill(pid, SIGTERM) == -1){
990
perror_plus("kill");
991
}
992
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
993
perror_plus("Failed to lower privileges after killing"
994
" helper program");
995
}
996
return false;
997
}
998
} while(pret == -1 and errno == EINTR);
999
if(pret == -1){
1000
perror_plus("waitpid");
1001
return false;
1002
}
1003
if(WIFEXITED(status)){
1004
if(WEXITSTATUS(status) != 0){
1005
fprintf_plus(stderr, "Error: iprouteadddel exited"
1006
" with status %d\n", WEXITSTATUS(status));
1007
return false;
1008
}
1009
return true;
1010
}
1011
if(WIFSIGNALED(status)){
1012
fprintf_plus(stderr, "Error: iprouteadddel died by"
1013
" signal %d\n", WTERMSIG(status));
1014
return false;
1015
}
1016
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1017
return false;
1018
}
1019
1020
__attribute__((nonnull, warn_unused_result))
1021
static bool add_local_route(const char *address,
1022
AvahiIfIndex if_index){
1023
if(debug){
1024
fprintf_plus(stderr, "Adding route to %s\n", address);
1025
}
1026
return add_delete_local_route(true, address, if_index);
1027
}
1028
1029
__attribute__((nonnull, warn_unused_result))
1030
static bool delete_local_route(const char *address,
1031
AvahiIfIndex if_index){
1032
if(debug){
1033
fprintf_plus(stderr, "Removing route to %s\n", address);
1034
}
1035
return add_delete_local_route(false, address, if_index);
1036
}
1037
1038
653
/* Called when a Mandos server is found */
1039
654
__attribute__((nonnull, warn_unused_result))
1040
655
static int start_mandos_communication(const char *ip, in_port_t port,
1051
666
int retval = -1;
1052
667
gnutls_session_t session;
1053
668
int pf; /* Protocol family */
1054
bool route_added = false;
1055
669
1056
670
errno = 0;
1057
671
1079
693
bool match = false;
1080
694
{
1081
695
char *interface = NULL;
1082
while((interface = argz_next(mc->interfaces,
1083
mc->interfaces_size,
1084
interface))){
696
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
697
interface))){
1085
698
if(if_nametoindex(interface) == (unsigned int)if_index){
1086
699
match = true;
1087
700
break;
1116
729
PRIuMAX "\n", ip, (uintmax_t)port);
1117
730
}
1118
731
1119
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
732
tcp_sd = socket(pf, SOCK_STREAM, 0);
1120
733
if(tcp_sd < 0){
1121
734
int e = errno;
1122
735
perror_plus("socket");
1129
742
goto mandos_end;
1130
743
}
1131
744
745
memset(&to, 0, sizeof(to));
1132
746
if(af == AF_INET6){
1133
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1134
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1135
ret = inet_pton(af, ip, &to6->sin6_addr);
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1136
749
} else { /* IPv4 */
1137
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1138
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1139
ret = inet_pton(af, ip, &to4->sin_addr);
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1140
752
}
1141
753
if(ret < 0 ){
1142
754
int e = errno;
1212
824
goto mandos_end;
1213
825
}
1214
826
1215
while(true){
1216
if(af == AF_INET6){
1217
ret = connect(tcp_sd, (struct sockaddr *)&to,
1218
sizeof(struct sockaddr_in6));
1219
} else {
1220
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1221
sizeof(struct sockaddr_in));
1222
}
1223
if(ret < 0){
1224
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1225
and if_index != AVAHI_IF_UNSPEC
1226
and connect_to == NULL
1227
and not route_added and
1228
((af == AF_INET6 and not
1229
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1230
&to)->sin6_addr)))
1231
or (af == AF_INET and
1232
/* Not a a IPv4LL address */
1233
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1234
& 0xFFFF0000L) != 0xA9FE0000L))){
1235
/* Work around Avahi bug - Avahi does not announce link-local
1236
addresses if it has a global address, so local hosts with
1237
*only* a link-local address (e.g. Mandos clients) cannot
1238
connect to a Mandos server announced by Avahi on a server
1239
host with a global address. Work around this by retrying
1240
with an explicit route added with the server's address.
1241
1242
Avahi bug reference:
1243
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
https://bugs.debian.org/587961
1245
*/
1246
if(debug){
1247
fprintf_plus(stderr, "Mandos server unreachable, trying"
1248
" direct route\n");
1249
}
1250
int e = errno;
1251
route_added = add_local_route(ip, if_index);
1252
if(route_added){
1253
continue;
1254
}
1255
errno = e;
1256
}
1257
if(errno != ECONNREFUSED or debug){
1258
int e = errno;
1259
perror_plus("connect");
1260
errno = e;
1261
}
1262
goto mandos_end;
1263
}
1264
1265
if(quit_now){
1266
errno = EINTR;
1267
goto mandos_end;
1268
}
1269
break;
827
if(af == AF_INET6){
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
830
} else {
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
833
}
834
if(ret < 0){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
836
int e = errno;
837
perror_plus("connect");
838
errno = e;
839
}
840
goto mandos_end;
841
}
842
843
if(quit_now){
844
errno = EINTR;
845
goto mandos_end;
1270
846
}
1271
847
1272
848
const char *out = mandos_protocol_version;
1426
1002
&decrypted_buffer, mc);
1427
1003
if(decrypted_buffer_size >= 0){
1428
1004
1429
clearerr(stdout);
1430
1005
written = 0;
1431
1006
while(written < (size_t) decrypted_buffer_size){
1432
1007
if(quit_now){
1448
1023
}
1449
1024
written += (size_t)ret;
1450
1025
}
1451
ret = fflush(stdout);
1452
if(ret != 0){
1453
int e = errno;
1454
if(debug){
1455
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1456
strerror(errno));
1457
}
1458
errno = e;
1459
goto mandos_end;
1460
}
1461
1026
retval = 0;
1462
1027
}
1463
1028
}
1466
1031
1467
1032
mandos_end:
1468
1033
{
1469
if(route_added){
1470
if(not delete_local_route(ip, if_index)){
1471
fprintf_plus(stderr, "Failed to delete local route to %s on"
1472
" interface %d", ip, if_index);
1473
}
1474
}
1475
1034
int e = errno;
1476
1035
free(decrypted_buffer);
1477
1036
free(buffer);
1478
1037
if(tcp_sd >= 0){
1479
ret = close(tcp_sd);
1038
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1480
1039
}
1481
1040
if(ret == -1){
1482
1041
if(e == 0){
1637
1196
__attribute__((nonnull, warn_unused_result))
1638
1197
bool get_flags(const char *ifname, struct ifreq *ifr){
1639
1198
int ret;
1640
int old_errno;
1199
error_t ret_errno;
1641
1200
1642
1201
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
1202
if(s < 0){
1644
old_errno = errno;
1203
ret_errno = errno;
1645
1204
perror_plus("socket");
1646
errno = old_errno;
1205
errno = ret_errno;
1647
1206
return false;
1648
1207
}
1649
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1650
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1208
strcpy(ifr->ifr_name, ifname);
1651
1209
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1652
1210
if(ret == -1){
1653
1211
if(debug){
1654
old_errno = errno;
1212
ret_errno = errno;
1655
1213
perror_plus("ioctl SIOCGIFFLAGS");
1656
errno = old_errno;
1214
errno = ret_errno;
1657
1215
}
1658
1216
return false;
1659
1217
}
1904
1462
}
1905
1463
}
1906
1464
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1467
error_t raise_privileges(void){
1468
error_t old_errno = errno;
1469
error_t ret_errno = 0;
1470
if(seteuid(0) == -1){
1471
ret_errno = errno;
1472
}
1473
errno = old_errno;
1474
return ret_errno;
1475
}
1476
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1479
error_t raise_privileges_permanently(void){
1480
error_t old_errno = errno;
1481
error_t ret_errno = raise_privileges();
1482
if(ret_errno != 0){
1483
errno = old_errno;
1484
return ret_errno;
1485
}
1486
if(setuid(0) == -1){
1487
ret_errno = errno;
1488
}
1489
errno = old_errno;
1490
return ret_errno;
1491
}
1492
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1495
error_t lower_privileges(void){
1496
error_t old_errno = errno;
1497
error_t ret_errno = 0;
1498
if(seteuid(uid) == -1){
1499
ret_errno = errno;
1500
}
1501
errno = old_errno;
1502
return ret_errno;
1503
}
1504
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1507
error_t lower_privileges_permanently(void){
1508
error_t old_errno = errno;
1509
error_t ret_errno = 0;
1510
if(setuid(uid) == -1){
1511
ret_errno = errno;
1512
}
1513
errno = old_errno;
1514
return ret_errno;
1515
}
1516
1907
1517
__attribute__((nonnull))
1908
1518
void run_network_hooks(const char *mode, const char *interface,
1909
1519
const float delay){
1910
1520
struct dirent **direntries = NULL;
1911
1521
if(hookdir_fd == -1){
1912
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1913
| O_CLOEXEC);
1522
hookdir_fd = open(hookdir, O_RDONLY);
1914
1523
if(hookdir_fd == -1){
1915
1524
if(errno == ENOENT){
1916
1525
if(debug){
1923
1532
return;
1924
1533
}
1925
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1926
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1927
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1928
1547
if(numhooks == -1){
1929
1548
perror_plus("scandir");
1930
1549
return;
1931
1550
}
1932
1551
struct dirent *direntry;
1933
1552
int ret;
1934
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1935
if(devnull == -1){
1936
perror_plus("open(\"/dev/null\", O_RDONLY)");
1937
return;
1938
}
1553
int devnull = open("/dev/null", O_RDONLY);
1939
1554
for(int i = 0; i < numhooks; i++){
1940
1555
direntry = direntries[i];
1941
1556
if(debug){
1965
1580
perror_plus("setgroups");
1966
1581
_exit(EX_NOPERM);
1967
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1968
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1969
1599
if(ret == -1){
1970
1600
perror_plus("setenv");
2005
1635
_exit(EX_OSERR);
2006
1636
}
2007
1637
}
2008
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2009
direntry->d_name,
2010
O_RDONLY));
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
2011
1639
if(hook_fd == -1){
2012
1640
perror_plus("openat");
2013
1641
_exit(EXIT_FAILURE);
2014
1642
}
2015
if(close(hookdir_fd) == -1){
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2016
1644
perror_plus("close");
2017
1645
_exit(EXIT_FAILURE);
2018
1646
}
2019
ret = dup2(devnull, STDIN_FILENO);
2020
if(ret == -1){
2021
perror_plus("dup2(devnull, STDIN_FILENO)");
2022
_exit(EX_OSERR);
2023
}
2024
ret = close(devnull);
2025
if(ret == -1){
2026
perror_plus("close");
2027
_exit(EX_OSERR);
2028
}
2029
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2030
if(ret == -1){
2031
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2032
_exit(EX_OSERR);
2033
}
2034
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2035
1648
environ) == -1){
2036
1649
perror_plus("fexecve");
2037
1650
_exit(EXIT_FAILURE);
2038
1651
}
2039
1652
} else {
2040
if(hook_pid == -1){
2041
perror_plus("fork");
2042
free(direntry);
2043
continue;
2044
}
2045
1653
int status;
2046
1654
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2047
1655
perror_plus("waitpid");
2076
1684
free(direntry);
2077
1685
}
2078
1686
free(direntries);
2079
if(close(hookdir_fd) == -1){
1687
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2080
1688
perror_plus("close");
2081
1689
} else {
2082
1690
hookdir_fd = -1;
2085
1693
}
2086
1694
2087
1695
__attribute__((nonnull, warn_unused_result))
2088
int bring_up_interface(const char *const interface,
2089
const float delay){
2090
int old_errno = errno;
1696
error_t bring_up_interface(const char *const interface,
1697
const float delay){
1698
error_t old_errno = errno;
2091
1699
int ret;
2092
1700
struct ifreq network;
2093
1701
unsigned int if_index = if_nametoindex(interface);
2103
1711
}
2104
1712
2105
1713
if(not interface_is_up(interface)){
2106
int ret_errno = 0;
2107
int ioctl_errno = 0;
1714
error_t ret_errno = 0, ioctl_errno = 0;
2108
1715
if(not get_flags(interface, &network)){
2109
1716
ret_errno = errno;
2110
1717
fprintf_plus(stderr, "Failed to get flags for interface "
2123
1730
}
2124
1731
2125
1732
if(quit_now){
2126
ret = close(sd);
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2127
1734
if(ret == -1){
2128
1735
perror_plus("close");
2129
1736
}
2179
1786
}
2180
1787
2181
1788
/* Close the socket */
2182
ret = close(sd);
1789
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2183
1790
if(ret == -1){
2184
1791
perror_plus("close");
2185
1792
}
2197
1804
2198
1805
/* Sleep checking until interface is running.
2199
1806
Check every 0.25s, up to total time of delay */
2200
for(int i = 0; i < delay * 4; i++){
1807
for(int i=0; i < delay * 4; i++){
2201
1808
if(interface_is_running(interface)){
2202
1809
break;
2203
1810
}
2213
1820
}
2214
1821
2215
1822
__attribute__((nonnull, warn_unused_result))
2216
int take_down_interface(const char *const interface){
2217
int old_errno = errno;
1823
error_t take_down_interface(const char *const interface){
1824
error_t old_errno = errno;
2218
1825
struct ifreq network;
2219
1826
unsigned int if_index = if_nametoindex(interface);
2220
1827
if(if_index == 0){
2223
1830
return ENXIO;
2224
1831
}
2225
1832
if(interface_is_up(interface)){
2226
int ret_errno = 0;
2227
int ioctl_errno = 0;
1833
error_t ret_errno = 0, ioctl_errno = 0;
2228
1834
if(not get_flags(interface, &network) and debug){
2229
1835
ret_errno = errno;
2230
1836
fprintf_plus(stderr, "Failed to get flags for interface "
2268
1874
}
2269
1875
2270
1876
/* Close the socket */
2271
int ret = close(sd);
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2272
1878
if(ret == -1){
2273
1879
perror_plus("close");
2274
1880
}
2289
1895
}
2290
1896
2291
1897
int main(int argc, char *argv[]){
2292
mandos_context mc = { .server = NULL, .dh_bits = 0,
2293
.priority = "SECURE256:!CTYPE-X.509"
2294
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2295
.current_server = NULL, .interfaces = NULL,
2296
.interfaces_size = 0 };
1898
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1899
.priority = "SECURE256:!CTYPE-X.509:"
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1901
.interfaces = NULL, .interfaces_size = 0 };
2297
1902
AvahiSServiceBrowser *sb = NULL;
2298
1903
error_t ret_errno;
2299
1904
int ret;
2308
1913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2309
1914
const char *seckey = PATHDIR "/" SECKEY;
2310
1915
const char *pubkey = PATHDIR "/" PUBKEY;
2311
const char *dh_params_file = NULL;
2312
1916
char *interfaces_hooks = NULL;
2313
1917
2314
1918
bool gnutls_initialized = false;
2367
1971
.doc = "Bit length of the prime number used in the"
2368
1972
" Diffie-Hellman key exchange",
2369
1973
.group = 2 },
2370
{ .name = "dh-params", .key = 134,
2371
.arg = "FILE",
2372
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2373
" for the Diffie-Hellman key exchange",
2374
.group = 2 },
2375
1974
{ .name = "priority", .key = 130,
2376
1975
.arg = "STRING",
2377
1976
.doc = "GnuTLS priority string for the TLS handshake",
2432
2031
}
2433
2032
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2434
2033
break;
2435
case 134: /* --dh-params */
2436
dh_params_file = arg;
2437
break;
2438
2034
case 130: /* --priority */
2439
2035
mc.priority = arg;
2440
2036
break;
2480
2076
.args_doc = "",
2481
2077
.doc = "Mandos client -- Get and decrypt"
2482
2078
" passwords from a Mandos server" };
2483
ret_errno = argp_parse(&argp, argc, argv,
2484
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2485
switch(ret_errno){
2079
ret = argp_parse(&argp, argc, argv,
2080
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2081
switch(ret){
2486
2082
case 0:
2487
2083
break;
2488
2084
case ENOMEM:
2489
2085
default:
2490
errno = ret_errno;
2086
errno = ret;
2491
2087
perror_plus("argp_parse");
2492
2088
exitcode = EX_OSERR;
2493
2089
goto end;
2496
2092
goto end;
2497
2093
}
2498
2094
}
2499
2095
2500
2096
{
2501
2097
/* Work around Debian bug #633582:
2502
<https://bugs.debian.org/633582> */
2098
<http://bugs.debian.org/633582> */
2503
2099
2504
2100
/* Re-raise privileges */
2505
ret = raise_privileges();
2506
if(ret != 0){
2507
errno = ret;
2101
ret_errno = raise_privileges();
2102
if(ret_errno != 0){
2103
errno = ret_errno;
2508
2104
perror_plus("Failed to raise privileges");
2509
2105
} else {
2510
2106
struct stat st;
2526
2122
}
2527
2123
}
2528
2124
}
2529
close(seckey_fd);
2125
TEMP_FAILURE_RETRY(close(seckey_fd));
2530
2126
}
2531
2127
}
2532
2128
2533
2129
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2534
2130
int pubkey_fd = open(pubkey, O_RDONLY);
2535
2131
if(pubkey_fd == -1){
2547
2143
}
2548
2144
}
2549
2145
}
2550
close(pubkey_fd);
2551
}
2552
}
2553
2554
if(dh_params_file != NULL
2555
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2556
int dhparams_fd = open(dh_params_file, O_RDONLY);
2557
if(dhparams_fd == -1){
2558
perror_plus("open");
2559
} else {
2560
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2561
if(ret == -1){
2562
perror_plus("fstat");
2563
} else {
2564
if(S_ISREG(st.st_mode)
2565
and st.st_uid == 0 and st.st_gid == 0){
2566
ret = fchown(dhparams_fd, uid, gid);
2567
if(ret == -1){
2568
perror_plus("fchown");
2569
}
2570
}
2571
}
2572
close(dhparams_fd);
2573
}
2574
}
2575
2146
TEMP_FAILURE_RETRY(close(pubkey_fd));
2147
}
2148
}
2149
2576
2150
/* Lower privileges */
2577
ret = lower_privileges();
2578
if(ret != 0){
2579
errno = ret;
2151
ret_errno = lower_privileges();
2152
if(ret_errno != 0){
2153
errno = ret_errno;
2580
2154
perror_plus("Failed to lower privileges");
2581
2155
}
2582
2156
}
2752
2326
errno = bring_up_interface(interface, delay);
2753
2327
if(not interface_was_up){
2754
2328
if(errno != 0){
2755
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2756
" %s\n", interface, strerror(errno));
2329
perror_plus("Failed to bring up interface");
2757
2330
} else {
2758
2331
errno = argz_add(&interfaces_to_take_down,
2759
2332
&interfaces_to_take_down_size,
2782
2355
goto end;
2783
2356
}
2784
2357
2785
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2358
ret = init_gnutls_global(pubkey, seckey, &mc);
2786
2359
if(ret == -1){
2787
2360
fprintf_plus(stderr, "init_gnutls_global failed\n");
2788
2361
exitcode = EX_UNAVAILABLE;
2910
2483
2911
2484
/* Allocate a new server */
2912
2485
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2913
&config, NULL, NULL, &ret);
2486
&config, NULL, NULL, &ret_errno);
2914
2487
2915
2488
/* Free the Avahi configuration data */
2916
2489
avahi_server_config_free(&config);
2919
2492
/* Check if creating the Avahi server object succeeded */
2920
2493
if(mc.server == NULL){
2921
2494
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2922
avahi_strerror(ret));
2495
avahi_strerror(ret_errno));
2923
2496
exitcode = EX_UNAVAILABLE;
2924
2497
goto end;
2925
2498
}
2960
2533
end:
2961
2534
2962
2535
if(debug){
2963
if(signal_received){
2964
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2965
argv[0], signal_received,
2966
strsignal(signal_received));
2967
} else {
2968
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2969
}
2536
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
2537
}
2971
2538
2972
2539
/* Cleanup things */
2983
2550
2984
2551
if(gnutls_initialized){
2985
2552
gnutls_certificate_free_credentials(mc.cred);
2553
gnutls_global_deinit();
2986
2554
gnutls_dh_params_deinit(mc.dh_params);
2987
2555
}
2988
2556
3011
2579
3012
2580
/* Re-raise privileges */
3013
2581
{
3014
ret = raise_privileges();
3015
if(ret != 0){
3016
errno = ret;
2582
ret_errno = raise_privileges();
2583
if(ret_errno != 0){
2584
errno = ret_errno;
3017
2585
perror_plus("Failed to raise privileges");
3018
2586
} else {
3019
2587
3024
2592
/* Take down the network interfaces which were brought up */
3025
2593
{
3026
2594
char *interface = NULL;
3027
while((interface = argz_next(interfaces_to_take_down,
3028
interfaces_to_take_down_size,
3029
interface))){
3030
ret = take_down_interface(interface);
3031
if(ret != 0){
3032
errno = ret;
2595
while((interface=argz_next(interfaces_to_take_down,
2596
interfaces_to_take_down_size,
2597
interface))){
2598
ret_errno = take_down_interface(interface);
2599
if(ret_errno != 0){
2600
errno = ret_errno;
3033
2601
perror_plus("Failed to take down interface");
3034
2602
}
3035
2603
}
3040
2608
}
3041
2609
}
3042
2610
3043
ret = lower_privileges_permanently();
3044
if(ret != 0){
3045
errno = ret;
2611
ret_errno = lower_privileges_permanently();
2612
if(ret_errno != 0){
2613
errno = ret_errno;
3046
2614
perror_plus("Failed to lower privileges permanently");
3047
2615
}
3048
2616
}
3050
2618
free(interfaces_to_take_down);
3051
2619
free(interfaces_hooks);
3052
2620
3053
void clean_dir_at(int base, const char * const dirname,
3054
uintmax_t level){
3055
struct dirent **direntries = NULL;
3056
int dret;
3057
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3058
O_RDONLY
3059
| O_NOFOLLOW
3060
| O_DIRECTORY
3061
| O_PATH));
3062
if(dir_fd == -1){
3063
perror_plus("open");
3064
}
3065
int numentries = scandirat(dir_fd, ".", &direntries,
3066
notdotentries, alphasort);
3067
if(numentries >= 0){
3068
for(int i = 0; i < numentries; i++){
3069
if(debug){
3070
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3071
dirname, direntries[i]->d_name);
3072
}
3073
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3074
if(dret == -1){
3075
if(errno == EISDIR){
3076
dret = unlinkat(dir_fd, direntries[i]->d_name,
3077
AT_REMOVEDIR);
3078
}
3079
if((dret == -1) and (errno == ENOTEMPTY)
3080
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3081
== 0) and (level == 0)){
3082
/* Recurse only in this special case */
3083
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3084
dret = 0;
3085
}
3086
if(dret == -1){
3087
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3088
direntries[i]->d_name, strerror(errno));
3089
}
3090
}
3091
free(direntries[i]);
3092
}
3093
3094
/* need to clean even if 0 because man page doesn't specify */
3095
free(direntries);
3096
if(numentries == -1){
3097
perror_plus("scandirat");
3098
}
3099
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3100
if(dret == -1 and errno != ENOENT){
3101
perror_plus("rmdir");
3102
}
3103
} else {
3104
perror_plus("scandirat");
3105
}
3106
close(dir_fd);
3107
}
3108
3109
2621
/* Removes the GPGME temp directory and all files inside */
3110
2622
if(tempdir != NULL){
3111
clean_dir_at(-1, tempdir, 0);
2623
struct dirent **direntries = NULL;
2624
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2625
O_NOFOLLOW));
2626
if(tempdir_fd == -1){
2627
perror_plus("open");
2628
} else {
2629
#ifdef __GLIBC__
2630
#if __GLIBC_PREREQ(2, 15)
2631
int numentries = scandirat(tempdir_fd, ".", &direntries,
2632
notdotentries, alphasort);
2633
#else /* not __GLIBC_PREREQ(2, 15) */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2635
alphasort);
2636
#endif /* not __GLIBC_PREREQ(2, 15) */
2637
#else /* not __GLIBC__ */
2638
int numentries = scandir(tempdir, &direntries, notdotentries,
2639
alphasort);
2640
#endif /* not __GLIBC__ */
2641
if(numentries >= 0){
2642
for(int i = 0; i < numentries; i++){
2643
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2644
if(ret == -1){
2645
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2646
" \"%s\", 0): %s\n", tempdir,
2647
direntries[i]->d_name, strerror(errno));
2648
}
2649
free(direntries[i]);
2650
}
2651
2652
/* need to clean even if 0 because man page doesn't specify */
2653
free(direntries);
2654
if(numentries == -1){
2655
perror_plus("scandir");
2656
}
2657
ret = rmdir(tempdir);
2658
if(ret == -1 and errno != ENOENT){
2659
perror_plus("rmdir");
2660
}
2661
}
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));
2663
}
3112
2664
}
3113
2665
3114
2666
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0