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- Committer: Teddy Hogeborn
- Date: 2011-07-27 17:58:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20110727175827-nrd1ysjl4jrh6qw1
Tags: version-1.3.1-1
* Makefile (version): Changed to "1.3.1".
* NEWS (Version 1.3.1): New entry.
* debian/changelog (1.3.1-1): - '' -
* NEWS (Version 1.3.1): New entry.
* debian/changelog (1.3.1-1): - '' -
- files added:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 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
43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
69
70
if_nametoindex(), IF_NAMESIZE */
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
82
83
#include <signal.h> /* sigemptyset(), sigaddset(),
83
84
sigaction(), SIGTERM, sig_atomic_t,
84
85
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
85
88
86
89
#ifdef __linux__
87
90
#include <sys/klog.h> /* klogctl() */
125
128
static const char mandos_protocol_version[] = "1";
126
129
const char *argp_program_version = "mandos-client " VERSION;
127
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
131
static const char sys_class_net[] = "/sys/class/net";
132
char *connect_to = NULL;
133
134
/* Doubly linked list that need to be circularly linked when used */
135
typedef struct server{
136
const char *ip;
137
uint16_t port;
138
AvahiIfIndex if_index;
139
int af;
140
struct timespec last_seen;
141
struct server *next;
142
struct server *prev;
143
} server;
128
144
129
145
/* Used for passing in values through the Avahi callback functions */
130
146
typedef struct {
135
151
gnutls_dh_params_t dh_params;
136
152
const char *priority;
137
153
gpgme_ctx_t ctx;
154
server *current_server;
138
155
} mandos_context;
139
156
140
157
/* global context so signal handler can reach it*/
141
158
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
159
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
144
162
145
163
sig_atomic_t quit_now = 0;
146
164
int signal_received = 0;
147
165
166
/* Function to use when printing errors */
167
void perror_plus(const char *print_text){
168
fprintf(stderr, "Mandos plugin %s: ",
169
program_invocation_short_name);
170
perror(print_text);
171
}
172
148
173
/*
149
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
150
175
* bytes. "buffer_capacity" is how much is currently allocated,
162
187
return buffer_capacity;
163
188
}
164
189
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
193
int ret;
194
server *new_server = malloc(sizeof(server));
195
if(new_server == NULL){
196
perror_plus("malloc");
197
return -1;
198
}
199
*new_server = (server){ .ip = strdup(ip),
200
.port = port,
201
.if_index = if_index,
202
.af = af };
203
if(new_server->ip == NULL){
204
perror_plus("strdup");
205
return -1;
206
}
207
/* unique case of first server */
208
if (mc.current_server == NULL){
209
new_server->next = new_server;
210
new_server->prev = new_server;
211
mc.current_server = new_server;
212
/* Placing the new server last in the list */
213
} else {
214
new_server->next = mc.current_server;
215
new_server->prev = mc.current_server->prev;
216
new_server->prev->next = new_server;
217
mc.current_server->prev = new_server;
218
}
219
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
220
if(ret == -1){
221
perror_plus("clock_gettime");
222
return -1;
223
}
224
return 0;
225
}
226
165
227
/*
166
228
* Initialize GPGME.
167
229
*/
181
243
182
244
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
183
245
if(fd == -1){
184
perror("open");
246
perror_plus("open");
185
247
return false;
186
248
}
187
249
201
263
202
264
ret = (int)TEMP_FAILURE_RETRY(close(fd));
203
265
if(ret == -1){
204
perror("close");
266
perror_plus("close");
205
267
}
206
268
gpgme_data_release(pgp_data);
207
269
return true;
332
394
333
395
/* Seek back to the beginning of the GPGME plaintext data buffer */
334
396
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
335
perror("gpgme_data_seek");
397
perror_plus("gpgme_data_seek");
336
398
plaintext_length = -1;
337
399
goto decrypt_end;
338
400
}
343
405
(size_t)plaintext_length,
344
406
plaintext_capacity);
345
407
if(plaintext_capacity == 0){
346
perror("incbuffer");
408
perror_plus("incbuffer");
347
409
plaintext_length = -1;
348
410
goto decrypt_end;
349
411
}
356
418
break;
357
419
}
358
420
if(ret < 0){
359
perror("gpgme_data_read");
421
perror_plus("gpgme_data_read");
360
422
plaintext_length = -1;
361
423
goto decrypt_end;
362
424
}
419
481
}
420
482
421
483
/* OpenPGP credentials */
422
gnutls_certificate_allocate_credentials(&mc.cred);
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
423
485
if(ret != GNUTLS_E_SUCCESS){
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
486
fprintf(stderr, "GnuTLS memory error: %s\n",
428
487
safer_gnutls_strerror(ret));
429
488
gnutls_global_deinit();
430
489
return -1;
552
611
gnutls_session_t session;
553
612
int pf; /* Protocol family */
554
613
614
errno = 0;
615
555
616
if(quit_now){
617
errno = EINTR;
556
618
return -1;
557
619
}
558
620
565
627
break;
566
628
default:
567
629
fprintf(stderr, "Bad address family: %d\n", af);
630
errno = EINVAL;
568
631
return -1;
569
632
}
570
633
580
643
581
644
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
645
if(tcp_sd < 0){
583
perror("socket");
646
int e = errno;
647
perror_plus("socket");
648
errno = e;
584
649
goto mandos_end;
585
650
}
586
651
587
652
if(quit_now){
653
errno = EINTR;
588
654
goto mandos_end;
589
655
}
590
656
597
663
ret = inet_pton(af, ip, &to.in.sin_addr);
598
664
}
599
665
if(ret < 0 ){
600
perror("inet_pton");
666
int e = errno;
667
perror_plus("inet_pton");
668
errno = e;
601
669
goto mandos_end;
602
670
}
603
671
if(ret == 0){
672
int e = errno;
604
673
fprintf(stderr, "Bad address: %s\n", ip);
674
errno = e;
605
675
goto mandos_end;
606
676
}
607
677
if(af == AF_INET6){
615
685
if(if_index == AVAHI_IF_UNSPEC){
616
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
617
687
" without a network interface\n");
688
errno = EINVAL;
618
689
goto mandos_end;
619
690
}
620
691
/* Set the network interface number as scope */
627
698
}
628
699
629
700
if(quit_now){
701
errno = EINTR;
630
702
goto mandos_end;
631
703
}
632
704
634
706
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
635
707
char interface[IF_NAMESIZE];
636
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
637
perror("if_indextoname");
709
perror_plus("if_indextoname");
638
710
} else {
639
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
640
712
ip, interface, port);
654
726
sizeof(addrstr));
655
727
}
656
728
if(pcret == NULL){
657
perror("inet_ntop");
729
perror_plus("inet_ntop");
658
730
} else {
659
731
if(strcmp(addrstr, ip) != 0){
660
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
663
735
}
664
736
665
737
if(quit_now){
738
errno = EINTR;
666
739
goto mandos_end;
667
740
}
668
741
672
745
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
673
746
}
674
747
if(ret < 0){
675
perror("connect");
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
749
int e = errno;
750
perror_plus("connect");
751
errno = e;
752
}
676
753
goto mandos_end;
677
754
}
678
755
679
756
if(quit_now){
757
errno = EINTR;
680
758
goto mandos_end;
681
759
}
682
760
687
765
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
688
766
out_size - written));
689
767
if(ret == -1){
690
perror("write");
768
int e = errno;
769
perror_plus("write");
770
errno = e;
691
771
goto mandos_end;
692
772
}
693
773
written += (size_t)ret;
703
783
}
704
784
705
785
if(quit_now){
786
errno = EINTR;
706
787
goto mandos_end;
707
788
}
708
789
}
712
793
}
713
794
714
795
if(quit_now){
796
errno = EINTR;
715
797
goto mandos_end;
716
798
}
717
799
800
/* Spurious warning from -Wint-to-pointer-cast */
718
801
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
719
802
720
803
if(quit_now){
804
errno = EINTR;
721
805
goto mandos_end;
722
806
}
723
807
724
808
do {
725
809
ret = gnutls_handshake(session);
726
810
if(quit_now){
811
errno = EINTR;
727
812
goto mandos_end;
728
813
}
729
814
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
733
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
734
819
gnutls_perror(ret);
735
820
}
821
errno = EPROTO;
736
822
goto mandos_end;
737
823
}
738
824
746
832
while(true){
747
833
748
834
if(quit_now){
835
errno = EINTR;
749
836
goto mandos_end;
750
837
}
751
838
752
839
buffer_capacity = incbuffer(&buffer, buffer_length,
753
840
buffer_capacity);
754
841
if(buffer_capacity == 0){
755
perror("incbuffer");
842
int e = errno;
843
perror_plus("incbuffer");
844
errno = e;
756
845
goto mandos_end;
757
846
}
758
847
759
848
if(quit_now){
849
errno = EINTR;
760
850
goto mandos_end;
761
851
}
762
852
775
865
ret = gnutls_handshake(session);
776
866
777
867
if(quit_now){
868
errno = EINTR;
778
869
goto mandos_end;
779
870
}
780
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
781
872
if(ret < 0){
782
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
783
874
gnutls_perror(ret);
875
errno = EPROTO;
784
876
goto mandos_end;
785
877
}
786
878
break;
788
880
fprintf(stderr, "Unknown error while reading data from"
789
881
" encrypted session with Mandos server\n");
790
882
gnutls_bye(session, GNUTLS_SHUT_RDWR);
883
errno = EIO;
791
884
goto mandos_end;
792
885
}
793
886
} else {
800
893
}
801
894
802
895
if(quit_now){
896
errno = EINTR;
803
897
goto mandos_end;
804
898
}
805
899
806
900
do {
807
901
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
808
902
if(quit_now){
903
errno = EINTR;
809
904
goto mandos_end;
810
905
}
811
906
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
820
915
written = 0;
821
916
while(written < (size_t) decrypted_buffer_size){
822
917
if(quit_now){
918
errno = EINTR;
823
919
goto mandos_end;
824
920
}
825
921
827
923
(size_t)decrypted_buffer_size - written,
828
924
stdout);
829
925
if(ret == 0 and ferror(stdout)){
926
int e = errno;
830
927
if(debug){
831
928
fprintf(stderr, "Error writing encrypted data: %s\n",
832
929
strerror(errno));
833
930
}
931
errno = e;
834
932
goto mandos_end;
835
933
}
836
934
written += (size_t)ret;
842
940
/* Shutdown procedure */
843
941
844
942
mandos_end:
845
free(decrypted_buffer);
846
free(buffer);
847
if(tcp_sd >= 0){
848
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
849
}
850
if(ret == -1){
851
perror("close");
852
}
853
gnutls_deinit(session);
854
if(quit_now){
855
retval = -1;
943
{
944
int e = errno;
945
free(decrypted_buffer);
946
free(buffer);
947
if(tcp_sd >= 0){
948
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
949
}
950
if(ret == -1){
951
if(e == 0){
952
e = errno;
953
}
954
perror_plus("close");
955
}
956
gnutls_deinit(session);
957
errno = e;
958
if(quit_now){
959
errno = EINTR;
960
retval = -1;
961
}
856
962
}
857
963
return retval;
858
964
}
901
1007
avahi_proto_to_af(proto));
902
1008
if(ret == 0){
903
1009
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
904
1013
}
905
1014
}
906
1015
}
960
1069
}
961
1070
}
962
1071
963
/* stop main loop after sigterm has been called */
1072
/* Signal handler that stops main loop after SIGTERM */
964
1073
static void handle_sigterm(int sig){
965
1074
if(quit_now){
966
1075
return;
968
1077
quit_now = 1;
969
1078
signal_received = sig;
970
1079
int old_errno = errno;
1080
/* set main loop to exit */
971
1081
if(mc.simple_poll != NULL){
972
1082
avahi_simple_poll_quit(mc.simple_poll);
973
1083
}
974
1084
errno = old_errno;
975
1085
}
976
1086
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1143
if(debug){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1146
}
1147
free(flagstring);
1148
return 0;
1149
}
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1154
if(debug){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1157
}
1158
return 0;
1159
}
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1162
if(debug){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1165
}
1166
return 1;
1167
}
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1170
if(debug){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1173
}
1174
return 0;
1175
}
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1178
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1181
}
1182
return 0;
1183
}
1184
/* Accept this device */
1185
if(debug){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1188
}
1189
return 1;
1190
}
1191
1192
int notdotentries(const struct dirent *direntry){
1193
/* Skip "." and ".." */
1194
if(direntry->d_name[0] == '.'
1195
and (direntry->d_name[1] == '\0'
1196
or (direntry->d_name[1] == '.'
1197
and direntry->d_name[2] == '\0'))){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
int ret;
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1208
1209
while(true){
1210
if(mc.current_server == NULL){
1211
if (debug){
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1214
}
1215
ret = avahi_simple_poll_iterate(s, -1);
1216
} else {
1217
if (debug){
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1220
}
1221
/* the current time */
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1223
if(ret == -1){
1224
perror_plus("clock_gettime");
1225
return -1;
1226
}
1227
/* Calculating in ms how long time between now and server
1228
who we visted longest time ago. Now - last seen. */
1229
waited_time.tv_sec = (now.tv_sec
1230
- mc.current_server->last_seen.tv_sec);
1231
waited_time.tv_nsec = (now.tv_nsec
1232
- mc.current_server->last_seen.tv_nsec);
1233
/* total time is 10s/10,000ms.
1234
Converting to s from ms by dividing by 1,000,
1235
and ns to ms by dividing by 1,000,000. */
1236
block_time = ((retry_interval
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1239
1240
if (debug){
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1242
}
1243
1244
if(block_time <= 0){
1245
ret = start_mandos_communication(mc.current_server->ip,
1246
mc.current_server->port,
1247
mc.current_server->if_index,
1248
mc.current_server->af);
1249
if(ret == 0){
1250
avahi_simple_poll_quit(mc.simple_poll);
1251
return 0;
1252
}
1253
ret = clock_gettime(CLOCK_MONOTONIC,
1254
&mc.current_server->last_seen);
1255
if(ret == -1){
1256
perror_plus("clock_gettime");
1257
return -1;
1258
}
1259
mc.current_server = mc.current_server->next;
1260
block_time = 0; /* Call avahi to find new Mandos
1261
servers, but don't block */
1262
}
1263
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1265
}
1266
if(ret != 0){
1267
if (ret > 0 or errno != EINTR) {
1268
return (ret != 1) ? ret : 0;
1269
}
1270
}
1271
}
1272
}
1273
977
1274
int main(int argc, char *argv[]){
978
1275
AvahiSServiceBrowser *sb = NULL;
979
1276
int error;
981
1278
intmax_t tmpmax;
982
1279
char *tmp;
983
1280
int exitcode = EXIT_SUCCESS;
984
const char *interface = "eth0";
1281
const char *interface = "";
985
1282
struct ifreq network;
986
1283
int sd = -1;
987
1284
bool take_down_interface = false;
988
1285
uid_t uid;
989
1286
gid_t gid;
990
char *connect_to = NULL;
991
1287
char tempdir[] = "/tmp/mandosXXXXXX";
992
1288
bool tempdir_created = false;
993
1289
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
997
1293
bool gnutls_initialized = false;
998
1294
bool gpgme_initialized = false;
999
1295
float delay = 2.5f;
1296
double retry_interval = 10; /* 10s between trying a server and
1297
retrying the same server again */
1000
1298
1001
1299
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1002
1300
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1008
1306
errno = 0;
1009
1307
ret = setgid(gid);
1010
1308
if(ret == -1){
1011
perror("setgid");
1309
perror_plus("setgid");
1012
1310
}
1013
1311
1014
1312
/* Lower user privileges (temporarily) */
1015
1313
errno = 0;
1016
1314
ret = seteuid(uid);
1017
1315
if(ret == -1){
1018
perror("seteuid");
1316
perror_plus("seteuid");
1019
1317
}
1020
1318
1021
1319
if(quit_now){
1056
1354
.arg = "SECONDS",
1057
1355
.doc = "Maximum delay to wait for interface startup",
1058
1356
.group = 2 },
1357
{ .name = "retry", .key = 132,
1358
.arg = "SECONDS",
1359
.doc = "Retry interval used when denied by the mandos server",
1360
.group = 2 },
1361
/*
1362
* These reproduce what we would get without ARGP_NO_HELP
1363
*/
1364
{ .name = "help", .key = '?',
1365
.doc = "Give this help list", .group = -1 },
1366
{ .name = "usage", .key = -3,
1367
.doc = "Give a short usage message", .group = -1 },
1368
{ .name = "version", .key = 'V',
1369
.doc = "Print program version", .group = -1 },
1059
1370
{ .name = NULL }
1060
1371
};
1061
1372
1062
1373
error_t parse_opt(int key, char *arg,
1063
1374
struct argp_state *state){
1375
errno = 0;
1064
1376
switch(key){
1065
1377
case 128: /* --debug */
1066
1378
debug = true;
1082
1394
tmpmax = strtoimax(arg, &tmp, 10);
1083
1395
if(errno != 0 or tmp == arg or *tmp != '\0'
1084
1396
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1397
argp_error(state, "Bad number of DH bits");
1087
1398
}
1088
1399
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1089
1400
break;
1094
1405
errno = 0;
1095
1406
delay = strtof(arg, &tmp);
1096
1407
if(errno != 0 or tmp == arg or *tmp != '\0'){
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
1408
argp_error(state, "Bad delay");
1409
}
1410
case 132: /* --retry */
1411
errno = 0;
1412
retry_interval = strtod(arg, &tmp);
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1414
or (retry_interval * 1000) > INT_MAX){
1415
argp_error(state, "Bad retry interval");
1099
1416
}
1100
1417
break;
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
1418
/*
1419
* These reproduce what we would get without ARGP_NO_HELP
1420
*/
1421
case '?': /* --help */
1422
argp_state_help(state, state->out_stream,
1423
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1424
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1425
case -3: /* --usage */
1426
argp_state_help(state, state->out_stream,
1427
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1428
case 'V': /* --version */
1429
fprintf(state->out_stream, "%s\n", argp_program_version);
1430
exit(argp_err_exit_status);
1104
1431
break;
1105
1432
default:
1106
1433
return ARGP_ERR_UNKNOWN;
1107
1434
}
1108
return 0;
1435
return errno;
1109
1436
}
1110
1437
1111
1438
struct argp argp = { .options = options, .parser = parse_opt,
1112
1439
.args_doc = "",
1113
1440
.doc = "Mandos client -- Get and decrypt"
1114
1441
" passwords from a Mandos server" };
1115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1116
if(ret == ARGP_ERR_UNKNOWN){
1117
fprintf(stderr, "Unknown error while parsing arguments\n");
1118
exitcode = EXIT_FAILURE;
1119
goto end;
1442
ret = argp_parse(&argp, argc, argv,
1443
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1444
switch(ret){
1445
case 0:
1446
break;
1447
case ENOMEM:
1448
default:
1449
errno = ret;
1450
perror_plus("argp_parse");
1451
exitcode = EX_OSERR;
1452
goto end;
1453
case EINVAL:
1454
exitcode = EX_USAGE;
1455
goto end;
1456
}
1457
}
1458
1459
{
1460
/* Work around Debian bug #633582:
1461
<http://bugs.debian.org/633582> */
1462
struct stat st;
1463
1464
/* Re-raise priviliges */
1465
errno = 0;
1466
ret = seteuid(0);
1467
if(ret == -1){
1468
perror_plus("seteuid");
1469
}
1470
1471
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1472
if(seckey_fd == -1){
1473
perror_plus("open");
1474
} else {
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1476
if(ret == -1){
1477
perror_plus("fstat");
1478
} else {
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(seckey_fd, uid, gid);
1481
if(ret == -1){
1482
perror_plus("fchown");
1483
}
1484
}
1485
}
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1487
}
1488
1489
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1490
if(pubkey_fd == -1){
1491
perror_plus("open");
1492
} else {
1493
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1494
if(ret == -1){
1495
perror_plus("fstat");
1496
} else {
1497
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1498
ret = fchown(pubkey_fd, uid, gid);
1499
if(ret == -1){
1500
perror_plus("fchown");
1501
}
1502
}
1503
}
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1505
}
1506
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror_plus("seteuid");
1120
1512
}
1121
1513
}
1122
1514
1123
1515
if(not debug){
1124
1516
avahi_set_log_function(empty_log);
1125
1517
}
1518
1519
if(interface[0] == '\0'){
1520
struct dirent **direntries;
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1522
alphasort);
1523
if(ret >= 1){
1524
/* Pick the first good interface */
1525
interface = strdup(direntries[0]->d_name);
1526
if(debug){
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1528
}
1529
if(interface == NULL){
1530
perror_plus("malloc");
1531
free(direntries);
1532
exitcode = EXIT_FAILURE;
1533
goto end;
1534
}
1535
free(direntries);
1536
} else {
1537
free(direntries);
1538
fprintf(stderr, "Could not find a network interface\n");
1539
exitcode = EXIT_FAILURE;
1540
goto end;
1541
}
1542
}
1126
1543
1127
1544
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1128
1545
from the signal handler */
1131
1548
mc.simple_poll = avahi_simple_poll_new();
1132
1549
if(mc.simple_poll == NULL){
1133
1550
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1134
exitcode = EXIT_FAILURE;
1551
exitcode = EX_UNAVAILABLE;
1135
1552
goto end;
1136
1553
}
1137
1554
1138
1555
sigemptyset(&sigterm_action.sa_mask);
1139
1556
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1140
1557
if(ret == -1){
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1558
perror_plus("sigaddset");
1559
exitcode = EX_OSERR;
1143
1560
goto end;
1144
1561
}
1145
1562
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1146
1563
if(ret == -1){
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1564
perror_plus("sigaddset");
1565
exitcode = EX_OSERR;
1149
1566
goto end;
1150
1567
}
1151
1568
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1152
1569
if(ret == -1){
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1570
perror_plus("sigaddset");
1571
exitcode = EX_OSERR;
1155
1572
goto end;
1156
1573
}
1157
1574
/* Need to check if the handler is SIG_IGN before handling:
1160
1577
*/
1161
1578
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1162
1579
if(ret == -1){
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1580
perror_plus("sigaction");
1581
return EX_OSERR;
1165
1582
}
1166
1583
if(old_sigterm_action.sa_handler != SIG_IGN){
1167
1584
ret = sigaction(SIGINT, &sigterm_action, NULL);
1168
1585
if(ret == -1){
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1586
perror_plus("sigaction");
1587
exitcode = EX_OSERR;
1171
1588
goto end;
1172
1589
}
1173
1590
}
1174
1591
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1175
1592
if(ret == -1){
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1593
perror_plus("sigaction");
1594
return EX_OSERR;
1178
1595
}
1179
1596
if(old_sigterm_action.sa_handler != SIG_IGN){
1180
1597
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1181
1598
if(ret == -1){
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1599
perror_plus("sigaction");
1600
exitcode = EX_OSERR;
1184
1601
goto end;
1185
1602
}
1186
1603
}
1187
1604
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1188
1605
if(ret == -1){
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1606
perror_plus("sigaction");
1607
return EX_OSERR;
1191
1608
}
1192
1609
if(old_sigterm_action.sa_handler != SIG_IGN){
1193
1610
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1194
1611
if(ret == -1){
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1612
perror_plus("sigaction");
1613
exitcode = EX_OSERR;
1197
1614
goto end;
1198
1615
}
1199
1616
}
1200
1617
1201
1618
/* If the interface is down, bring it up */
1202
if(interface[0] != '\0'){
1619
if(strcmp(interface, "none") != 0){
1203
1620
if_index = (AvahiIfIndex) if_nametoindex(interface);
1204
1621
if(if_index == 0){
1205
1622
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1206
exitcode = EXIT_FAILURE;
1623
exitcode = EX_UNAVAILABLE;
1207
1624
goto end;
1208
1625
}
1209
1626
1215
1632
errno = 0;
1216
1633
ret = seteuid(0);
1217
1634
if(ret == -1){
1218
perror("seteuid");
1635
perror_plus("seteuid");
1219
1636
}
1220
1637
1221
1638
#ifdef __linux__
1222
1639
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1223
messages to mess up the prompt */
1640
messages about the network interface to mess up the prompt */
1224
1641
ret = klogctl(8, NULL, 5);
1225
1642
bool restore_loglevel = true;
1226
1643
if(ret == -1){
1227
1644
restore_loglevel = false;
1228
perror("klogctl");
1645
perror_plus("klogctl");
1229
1646
}
1230
1647
#endif /* __linux__ */
1231
1648
1232
1649
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1233
1650
if(sd < 0){
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1651
perror_plus("socket");
1652
exitcode = EX_OSERR;
1236
1653
#ifdef __linux__
1237
1654
if(restore_loglevel){
1238
1655
ret = klogctl(7, NULL, 0);
1239
1656
if(ret == -1){
1240
perror("klogctl");
1657
perror_plus("klogctl");
1241
1658
}
1242
1659
}
1243
1660
#endif /* __linux__ */
1245
1662
errno = 0;
1246
1663
ret = seteuid(uid);
1247
1664
if(ret == -1){
1248
perror("seteuid");
1665
perror_plus("seteuid");
1249
1666
}
1250
1667
goto end;
1251
1668
}
1252
1669
strcpy(network.ifr_name, interface);
1253
1670
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1254
1671
if(ret == -1){
1255
perror("ioctl SIOCGIFFLAGS");
1672
perror_plus("ioctl SIOCGIFFLAGS");
1256
1673
#ifdef __linux__
1257
1674
if(restore_loglevel){
1258
1675
ret = klogctl(7, NULL, 0);
1259
1676
if(ret == -1){
1260
perror("klogctl");
1677
perror_plus("klogctl");
1261
1678
}
1262
1679
}
1263
1680
#endif /* __linux__ */
1264
exitcode = EXIT_FAILURE;
1681
exitcode = EX_OSERR;
1265
1682
/* Lower privileges */
1266
1683
errno = 0;
1267
1684
ret = seteuid(uid);
1268
1685
if(ret == -1){
1269
perror("seteuid");
1686
perror_plus("seteuid");
1270
1687
}
1271
1688
goto end;
1272
1689
}
1276
1693
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1277
1694
if(ret == -1){
1278
1695
take_down_interface = false;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
exitcode = EX_OSERR;
1281
1698
#ifdef __linux__
1282
1699
if(restore_loglevel){
1283
1700
ret = klogctl(7, NULL, 0);
1284
1701
if(ret == -1){
1285
perror("klogctl");
1702
perror_plus("klogctl");
1286
1703
}
1287
1704
}
1288
1705
#endif /* __linux__ */
1290
1707
errno = 0;
1291
1708
ret = seteuid(uid);
1292
1709
if(ret == -1){
1293
perror("seteuid");
1710
perror_plus("seteuid");
1294
1711
}
1295
1712
goto end;
1296
1713
}
1297
1714
}
1298
/* sleep checking until interface is running */
1715
/* Sleep checking until interface is running.
1716
Check every 0.25s, up to total time of delay */
1299
1717
for(int i=0; i < delay * 4; i++){
1300
1718
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1301
1719
if(ret == -1){
1302
perror("ioctl SIOCGIFFLAGS");
1720
perror_plus("ioctl SIOCGIFFLAGS");
1303
1721
} else if(network.ifr_flags & IFF_RUNNING){
1304
1722
break;
1305
1723
}
1306
1724
struct timespec sleeptime = { .tv_nsec = 250000000 };
1307
1725
ret = nanosleep(&sleeptime, NULL);
1308
1726
if(ret == -1 and errno != EINTR){
1309
perror("nanosleep");
1727
perror_plus("nanosleep");
1310
1728
}
1311
1729
}
1312
1730
if(not take_down_interface){
1313
1731
/* We won't need the socket anymore */
1314
1732
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1315
1733
if(ret == -1){
1316
perror("close");
1734
perror_plus("close");
1317
1735
}
1318
1736
}
1319
1737
#ifdef __linux__
1321
1739
/* Restores kernel loglevel to default */
1322
1740
ret = klogctl(7, NULL, 0);
1323
1741
if(ret == -1){
1324
perror("klogctl");
1742
perror_plus("klogctl");
1325
1743
}
1326
1744
}
1327
1745
#endif /* __linux__ */
1331
1749
/* Lower privileges */
1332
1750
ret = seteuid(uid);
1333
1751
if(ret == -1){
1334
perror("seteuid");
1752
perror_plus("seteuid");
1335
1753
}
1336
1754
} else {
1337
1755
/* Lower privileges permanently */
1338
1756
ret = setuid(uid);
1339
1757
if(ret == -1){
1340
perror("setuid");
1758
perror_plus("setuid");
1341
1759
}
1342
1760
}
1343
1761
}
1349
1767
ret = init_gnutls_global(pubkey, seckey);
1350
1768
if(ret == -1){
1351
1769
fprintf(stderr, "init_gnutls_global failed\n");
1352
exitcode = EXIT_FAILURE;
1770
exitcode = EX_UNAVAILABLE;
1353
1771
goto end;
1354
1772
} else {
1355
1773
gnutls_initialized = true;
1359
1777
goto end;
1360
1778
}
1361
1779
1780
if(mkdtemp(tempdir) == NULL){
1781
perror_plus("mkdtemp");
1782
goto end;
1783
}
1362
1784
tempdir_created = true;
1363
if(mkdtemp(tempdir) == NULL){
1364
tempdir_created = false;
1365
perror("mkdtemp");
1366
goto end;
1367
}
1368
1785
1369
1786
if(quit_now){
1370
1787
goto end;
1372
1789
1373
1790
if(not init_gpgme(pubkey, seckey, tempdir)){
1374
1791
fprintf(stderr, "init_gpgme failed\n");
1375
exitcode = EXIT_FAILURE;
1792
exitcode = EX_UNAVAILABLE;
1376
1793
goto end;
1377
1794
} else {
1378
1795
gpgme_initialized = true;
1388
1805
char *address = strrchr(connect_to, ':');
1389
1806
if(address == NULL){
1390
1807
fprintf(stderr, "No colon in address\n");
1391
exitcode = EXIT_FAILURE;
1808
exitcode = EX_USAGE;
1392
1809
goto end;
1393
1810
}
1394
1811
1402
1819
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1403
1820
or tmpmax != (uint16_t)tmpmax){
1404
1821
fprintf(stderr, "Bad port number\n");
1405
exitcode = EXIT_FAILURE;
1822
exitcode = EX_USAGE;
1406
1823
goto end;
1407
1824
}
1408
1825
1424
1841
if(quit_now){
1425
1842
goto end;
1426
1843
}
1427
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
1844
1845
while(not quit_now){
1846
ret = start_mandos_communication(address, port, if_index, af);
1847
if(quit_now or ret == 0){
1848
break;
1849
}
1850
sleep((int)retry_interval or 1);
1851
};
1852
1853
if (not quit_now){
1432
1854
exitcode = EXIT_SUCCESS;
1433
1855
}
1856
1434
1857
goto end;
1435
1858
}
1436
1859
1460
1883
if(mc.server == NULL){
1461
1884
fprintf(stderr, "Failed to create Avahi server: %s\n",
1462
1885
avahi_strerror(error));
1463
exitcode = EXIT_FAILURE;
1886
exitcode = EX_UNAVAILABLE;
1464
1887
goto end;
1465
1888
}
1466
1889
1475
1898
if(sb == NULL){
1476
1899
fprintf(stderr, "Failed to create service browser: %s\n",
1477
1900
avahi_strerror(avahi_server_errno(mc.server)));
1478
exitcode = EXIT_FAILURE;
1901
exitcode = EX_UNAVAILABLE;
1479
1902
goto end;
1480
1903
}
1481
1904
1488
1911
if(debug){
1489
1912
fprintf(stderr, "Starting Avahi loop search\n");
1490
1913
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
1914
1915
ret = avahi_loop_with_timeout(mc.simple_poll,
1916
(int)(retry_interval * 1000));
1917
if(debug){
1918
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1919
(ret == 0) ? "successfully" : "with error");
1920
}
1493
1921
1494
1922
end:
1495
1923
1516
1944
if(gpgme_initialized){
1517
1945
gpgme_release(mc.ctx);
1518
1946
}
1947
1948
/* Cleans up the circular linked list of Mandos servers the client
1949
has seen */
1950
if(mc.current_server != NULL){
1951
mc.current_server->prev->next = NULL;
1952
while(mc.current_server != NULL){
1953
server *next = mc.current_server->next;
1954
free(mc.current_server);
1955
mc.current_server = next;
1956
}
1957
}
1519
1958
1520
1959
/* Take down the network interface */
1521
1960
if(take_down_interface){
1523
1962
errno = 0;
1524
1963
ret = seteuid(0);
1525
1964
if(ret == -1){
1526
perror("seteuid");
1965
perror_plus("seteuid");
1527
1966
}
1528
1967
if(geteuid() == 0){
1529
1968
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1530
1969
if(ret == -1){
1531
perror("ioctl SIOCGIFFLAGS");
1970
perror_plus("ioctl SIOCGIFFLAGS");
1532
1971
} else if(network.ifr_flags & IFF_UP) {
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1972
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1534
1973
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1535
1974
if(ret == -1){
1536
perror("ioctl SIOCSIFFLAGS");
1975
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1537
1976
}
1538
1977
}
1539
1978
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1540
1979
if(ret == -1){
1541
perror("close");
1980
perror_plus("close");
1542
1981
}
1543
1982
/* Lower privileges permanently */
1544
1983
errno = 0;
1545
1984
ret = setuid(uid);
1546
1985
if(ret == -1){
1547
perror("setuid");
1986
perror_plus("setuid");
1548
1987
}
1549
1988
}
1550
1989
}
1551
1990
1552
/* Removes the temp directory used by GPGME */
1991
/* Removes the GPGME temp directory and all files inside */
1553
1992
if(tempdir_created){
1554
DIR *d;
1555
struct dirent *direntry;
1556
d = opendir(tempdir);
1557
if(d == NULL){
1558
if(errno != ENOENT){
1559
perror("opendir");
1560
}
1561
} else {
1562
while(true){
1563
direntry = readdir(d);
1564
if(direntry == NULL){
1565
break;
1566
}
1567
/* Skip "." and ".." */
1568
if(direntry->d_name[0] == '.'
1569
and (direntry->d_name[1] == '\0'
1570
or (direntry->d_name[1] == '.'
1571
and direntry->d_name[2] == '\0'))){
1572
continue;
1573
}
1993
struct dirent **direntries = NULL;
1994
struct dirent *direntry = NULL;
1995
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1996
if (ret > 0){
1997
for(int i = 0; i < ret; i++){
1998
direntry = direntries[i];
1574
1999
char *fullname = NULL;
1575
2000
ret = asprintf(&fullname, "%s/%s", tempdir,
1576
2001
direntry->d_name);
1577
2002
if(ret < 0){
1578
perror("asprintf");
2003
perror_plus("asprintf");
1579
2004
continue;
1580
2005
}
1581
2006
ret = remove(fullname);
1585
2010
}
1586
2011
free(fullname);
1587
2012
}
1588
closedir(d);
2013
}
2014
2015
/* need to be cleaned even if ret == 0 because man page doesn't
2016
specify */
2017
free(direntries);
2018
if (ret == -1){
2019
perror_plus("scandir");
1589
2020
}
1590
2021
ret = rmdir(tempdir);
1591
2022
if(ret == -1 and errno != ENOENT){
1592
perror("rmdir");
2023
perror_plus("rmdir");
1593
2024
}
1594
2025
}
1595
2026
1600
2031
&old_sigterm_action,
1601
2032
NULL));
1602
2033
if(ret == -1){
1603
perror("sigaction");
2034
perror_plus("sigaction");
1604
2035
}
1605
2036
do {
1606
2037
ret = raise(signal_received);
1607
2038
} while(ret != 0 and errno == EINTR);
1608
2039
if(ret != 0){
1609
perror("raise");
2040
perror_plus("raise");
1610
2041
abort();
1611
2042
}
1612
2043
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0