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- Committer: Teddy Hogeborn
- Date: 2009-09-17 11:22:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20090917112228-yizc8zr9brqr3cjd
* plugins.d/mandos-client.c (main): Try harder to raise signal on
exit, and wait for it to arrive.
exit, and wait for it to arrive.
- files removed:
- 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), 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
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
83
82
#include <signal.h> /* sigemptyset(), sigaddset(),
84
83
sigaction(), SIGTERM, sig_atomic_t,
85
84
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
85
89
86
#ifdef __linux__
90
87
#include <sys/klog.h> /* klogctl() */
128
125
static const char mandos_protocol_version[] = "1";
129
126
const char *argp_program_version = "mandos-client " VERSION;
130
127
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;
144
128
145
129
/* Used for passing in values through the Avahi callback functions */
146
130
typedef struct {
151
135
gnutls_dh_params_t dh_params;
152
136
const char *priority;
153
137
gpgme_ctx_t ctx;
154
server *current_server;
155
138
} mandos_context;
156
139
157
140
/* global context so signal handler can reach it*/
158
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
142
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
162
144
163
145
sig_atomic_t quit_now = 0;
164
146
int signal_received = 0;
165
147
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
173
148
/*
174
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
150
* bytes. "buffer_capacity" is how much is currently allocated,
187
162
return buffer_capacity;
188
163
}
189
164
190
/* Add server to set of servers to retry periodically */
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
194
int ret;
195
server *new_server = malloc(sizeof(server));
196
if(new_server == NULL){
197
perror_plus("malloc");
198
return -1;
199
}
200
*new_server = (server){ .ip = strdup(ip),
201
.port = port,
202
.if_index = if_index,
203
.af = af };
204
if(new_server->ip == NULL){
205
perror_plus("strdup");
206
return -1;
207
}
208
/* Special case of first server */
209
if (mc.current_server == NULL){
210
new_server->next = new_server;
211
new_server->prev = new_server;
212
mc.current_server = new_server;
213
/* Place the new server last in the list */
214
} else {
215
new_server->next = mc.current_server;
216
new_server->prev = mc.current_server->prev;
217
new_server->prev->next = new_server;
218
mc.current_server->prev = new_server;
219
}
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
221
if(ret == -1){
222
perror_plus("clock_gettime");
223
return -1;
224
}
225
return 0;
226
}
227
228
165
/*
229
166
* Initialize GPGME.
230
167
*/
244
181
245
182
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
246
183
if(fd == -1){
247
perror_plus("open");
184
perror("open");
248
185
return false;
249
186
}
250
187
264
201
265
202
ret = (int)TEMP_FAILURE_RETRY(close(fd));
266
203
if(ret == -1){
267
perror_plus("close");
204
perror("close");
268
205
}
269
206
gpgme_data_release(pgp_data);
270
207
return true;
395
332
396
333
/* Seek back to the beginning of the GPGME plaintext data buffer */
397
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
398
perror_plus("gpgme_data_seek");
335
perror("gpgme_data_seek");
399
336
plaintext_length = -1;
400
337
goto decrypt_end;
401
338
}
406
343
(size_t)plaintext_length,
407
344
plaintext_capacity);
408
345
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
346
perror("incbuffer");
410
347
plaintext_length = -1;
411
348
goto decrypt_end;
412
349
}
419
356
break;
420
357
}
421
358
if(ret < 0){
422
perror_plus("gpgme_data_read");
359
perror("gpgme_data_read");
423
360
plaintext_length = -1;
424
361
goto decrypt_end;
425
362
}
482
419
}
483
420
484
421
/* OpenPGP credentials */
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
422
gnutls_certificate_allocate_credentials(&mc.cred);
486
423
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
488
428
safer_gnutls_strerror(ret));
489
429
gnutls_global_deinit();
490
430
return -1;
612
552
gnutls_session_t session;
613
553
int pf; /* Protocol family */
614
554
615
errno = 0;
616
617
555
if(quit_now){
618
errno = EINTR;
619
556
return -1;
620
557
}
621
558
628
565
break;
629
566
default:
630
567
fprintf(stderr, "Bad address family: %d\n", af);
631
errno = EINVAL;
632
568
return -1;
633
569
}
634
570
644
580
645
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
646
582
if(tcp_sd < 0){
647
int e = errno;
648
perror_plus("socket");
649
errno = e;
583
perror("socket");
650
584
goto mandos_end;
651
585
}
652
586
653
587
if(quit_now){
654
errno = EINTR;
655
588
goto mandos_end;
656
589
}
657
590
664
597
ret = inet_pton(af, ip, &to.in.sin_addr);
665
598
}
666
599
if(ret < 0 ){
667
int e = errno;
668
perror_plus("inet_pton");
669
errno = e;
600
perror("inet_pton");
670
601
goto mandos_end;
671
602
}
672
603
if(ret == 0){
673
int e = errno;
674
604
fprintf(stderr, "Bad address: %s\n", ip);
675
errno = e;
676
605
goto mandos_end;
677
606
}
678
607
if(af == AF_INET6){
686
615
if(if_index == AVAHI_IF_UNSPEC){
687
616
fprintf(stderr, "An IPv6 link-local address is incomplete"
688
617
" without a network interface\n");
689
errno = EINVAL;
690
618
goto mandos_end;
691
619
}
692
620
/* Set the network interface number as scope */
699
627
}
700
628
701
629
if(quit_now){
702
errno = EINTR;
703
630
goto mandos_end;
704
631
}
705
632
707
634
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
708
635
char interface[IF_NAMESIZE];
709
636
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
637
perror("if_indextoname");
711
638
} else {
712
639
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
640
ip, interface, port);
727
654
sizeof(addrstr));
728
655
}
729
656
if(pcret == NULL){
730
perror_plus("inet_ntop");
657
perror("inet_ntop");
731
658
} else {
732
659
if(strcmp(addrstr, ip) != 0){
733
660
fprintf(stderr, "Canonical address form: %s\n", addrstr);
736
663
}
737
664
738
665
if(quit_now){
739
errno = EINTR;
740
666
goto mandos_end;
741
667
}
742
668
746
672
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
747
673
}
748
674
if(ret < 0){
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
int e = errno;
751
perror_plus("connect");
752
errno = e;
753
}
675
perror("connect");
754
676
goto mandos_end;
755
677
}
756
678
757
679
if(quit_now){
758
errno = EINTR;
759
680
goto mandos_end;
760
681
}
761
682
766
687
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
767
688
out_size - written));
768
689
if(ret == -1){
769
int e = errno;
770
perror_plus("write");
771
errno = e;
690
perror("write");
772
691
goto mandos_end;
773
692
}
774
693
written += (size_t)ret;
784
703
}
785
704
786
705
if(quit_now){
787
errno = EINTR;
788
706
goto mandos_end;
789
707
}
790
708
}
794
712
}
795
713
796
714
if(quit_now){
797
errno = EINTR;
798
715
goto mandos_end;
799
716
}
800
717
801
/* Spurious warning from -Wint-to-pointer-cast */
802
718
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
803
719
804
720
if(quit_now){
805
errno = EINTR;
806
721
goto mandos_end;
807
722
}
808
723
809
724
do {
810
725
ret = gnutls_handshake(session);
811
726
if(quit_now){
812
errno = EINTR;
813
727
goto mandos_end;
814
728
}
815
729
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
819
733
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
820
734
gnutls_perror(ret);
821
735
}
822
errno = EPROTO;
823
736
goto mandos_end;
824
737
}
825
738
833
746
while(true){
834
747
835
748
if(quit_now){
836
errno = EINTR;
837
749
goto mandos_end;
838
750
}
839
751
840
752
buffer_capacity = incbuffer(&buffer, buffer_length,
841
753
buffer_capacity);
842
754
if(buffer_capacity == 0){
843
int e = errno;
844
perror_plus("incbuffer");
845
errno = e;
755
perror("incbuffer");
846
756
goto mandos_end;
847
757
}
848
758
849
759
if(quit_now){
850
errno = EINTR;
851
760
goto mandos_end;
852
761
}
853
762
866
775
ret = gnutls_handshake(session);
867
776
868
777
if(quit_now){
869
errno = EINTR;
870
778
goto mandos_end;
871
779
}
872
780
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
873
781
if(ret < 0){
874
782
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
875
783
gnutls_perror(ret);
876
errno = EPROTO;
877
784
goto mandos_end;
878
785
}
879
786
break;
881
788
fprintf(stderr, "Unknown error while reading data from"
882
789
" encrypted session with Mandos server\n");
883
790
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
errno = EIO;
885
791
goto mandos_end;
886
792
}
887
793
} else {
894
800
}
895
801
896
802
if(quit_now){
897
errno = EINTR;
898
803
goto mandos_end;
899
804
}
900
805
901
806
do {
902
807
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
903
808
if(quit_now){
904
errno = EINTR;
905
809
goto mandos_end;
906
810
}
907
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
916
820
written = 0;
917
821
while(written < (size_t) decrypted_buffer_size){
918
822
if(quit_now){
919
errno = EINTR;
920
823
goto mandos_end;
921
824
}
922
825
924
827
(size_t)decrypted_buffer_size - written,
925
828
stdout);
926
829
if(ret == 0 and ferror(stdout)){
927
int e = errno;
928
830
if(debug){
929
831
fprintf(stderr, "Error writing encrypted data: %s\n",
930
832
strerror(errno));
931
833
}
932
errno = e;
933
834
goto mandos_end;
934
835
}
935
836
written += (size_t)ret;
941
842
/* Shutdown procedure */
942
843
943
844
mandos_end:
944
{
945
int e = errno;
946
free(decrypted_buffer);
947
free(buffer);
948
if(tcp_sd >= 0){
949
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
950
}
951
if(ret == -1){
952
if(e == 0){
953
e = errno;
954
}
955
perror_plus("close");
956
}
957
gnutls_deinit(session);
958
errno = e;
959
if(quit_now){
960
errno = EINTR;
961
retval = -1;
962
}
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;
963
856
}
964
857
return retval;
965
858
}
1008
901
avahi_proto_to_af(proto));
1009
902
if(ret == 0){
1010
903
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1014
904
}
1015
905
}
1016
906
}
1070
960
}
1071
961
}
1072
962
1073
/* Signal handler that stops main loop after SIGTERM */
963
/* stop main loop after sigterm has been called */
1074
964
static void handle_sigterm(int sig){
1075
965
if(quit_now){
1076
966
return;
1078
968
quit_now = 1;
1079
969
signal_received = sig;
1080
970
int old_errno = errno;
1081
/* set main loop to exit */
1082
971
if(mc.simple_poll != NULL){
1083
972
avahi_simple_poll_quit(mc.simple_poll);
1084
973
}
1085
974
errno = old_errno;
1086
975
}
1087
976
1088
/*
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1092
*/
1093
int good_interface(const struct dirent *if_entry){
1094
ssize_t ssret;
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1097
return 0;
1098
}
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1100
if_entry->d_name);
1101
if(ret < 0){
1102
perror_plus("asprintf");
1103
return 0;
1104
}
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
if(flags_fd == -1){
1107
perror_plus("open");
1108
free(flagname);
1109
return 0;
1110
}
1111
free(flagname);
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1119
close(flags_fd);
1120
return 0;
1121
}
1122
while(to_read > 0){
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1124
(size_t)to_read));
1125
if(ssret == -1){
1126
perror_plus("read");
1127
free(flagstring);
1128
close(flags_fd);
1129
return 0;
1130
}
1131
to_read -= ssret;
1132
if(ssret == 0){
1133
break;
1134
}
1135
}
1136
close(flags_fd);
1137
intmax_t tmpmax;
1138
char *tmp;
1139
errno = 0;
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1144
if(debug){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1147
}
1148
free(flagstring);
1149
return 0;
1150
}
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1153
/* Reject the loopback device */
1154
if(flags & IFF_LOOPBACK){
1155
if(debug){
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1158
}
1159
return 0;
1160
}
1161
/* Accept point-to-point devices only if connect_to is specified */
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1163
if(debug){
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1166
}
1167
return 1;
1168
}
1169
/* Otherwise, reject non-broadcast-capable devices */
1170
if(not (flags & IFF_BROADCAST)){
1171
if(debug){
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1174
}
1175
return 0;
1176
}
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1179
if(debug){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1182
}
1183
return 0;
1184
}
1185
/* Accept this device */
1186
if(debug){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1189
}
1190
return 1;
1191
}
1192
1193
int notdotentries(const struct dirent *direntry){
1194
/* Skip "." and ".." */
1195
if(direntry->d_name[0] == '.'
1196
and (direntry->d_name[1] == '\0'
1197
or (direntry->d_name[1] == '.'
1198
and direntry->d_name[2] == '\0'))){
1199
return 0;
1200
}
1201
return 1;
1202
}
1203
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
int ret;
1206
struct timespec now;
1207
struct timespec waited_time;
1208
intmax_t block_time;
1209
1210
while(true){
1211
if(mc.current_server == NULL){
1212
if (debug){
1213
fprintf(stderr,
1214
"Wait until first server is found. No timeout!\n");
1215
}
1216
ret = avahi_simple_poll_iterate(s, -1);
1217
} else {
1218
if (debug){
1219
fprintf(stderr, "Check current_server if we should run it,"
1220
" or wait\n");
1221
}
1222
/* the current time */
1223
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1224
if(ret == -1){
1225
perror_plus("clock_gettime");
1226
return -1;
1227
}
1228
/* Calculating in ms how long time between now and server
1229
who we visted longest time ago. Now - last seen. */
1230
waited_time.tv_sec = (now.tv_sec
1231
- mc.current_server->last_seen.tv_sec);
1232
waited_time.tv_nsec = (now.tv_nsec
1233
- mc.current_server->last_seen.tv_nsec);
1234
/* total time is 10s/10,000ms.
1235
Converting to s from ms by dividing by 1,000,
1236
and ns to ms by dividing by 1,000,000. */
1237
block_time = ((retry_interval
1238
- ((intmax_t)waited_time.tv_sec * 1000))
1239
- ((intmax_t)waited_time.tv_nsec / 1000000));
1240
1241
if (debug){
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1243
}
1244
1245
if(block_time <= 0){
1246
ret = start_mandos_communication(mc.current_server->ip,
1247
mc.current_server->port,
1248
mc.current_server->if_index,
1249
mc.current_server->af);
1250
if(ret == 0){
1251
avahi_simple_poll_quit(mc.simple_poll);
1252
return 0;
1253
}
1254
ret = clock_gettime(CLOCK_MONOTONIC,
1255
&mc.current_server->last_seen);
1256
if(ret == -1){
1257
perror_plus("clock_gettime");
1258
return -1;
1259
}
1260
mc.current_server = mc.current_server->next;
1261
block_time = 0; /* Call avahi to find new Mandos
1262
servers, but don't block */
1263
}
1264
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1266
}
1267
if(ret != 0){
1268
if (ret > 0 or errno != EINTR) {
1269
return (ret != 1) ? ret : 0;
1270
}
1271
}
1272
}
1273
}
1274
1275
977
int main(int argc, char *argv[]){
1276
978
AvahiSServiceBrowser *sb = NULL;
1277
979
int error;
1279
981
intmax_t tmpmax;
1280
982
char *tmp;
1281
983
int exitcode = EXIT_SUCCESS;
1282
const char *interface = "";
984
const char *interface = "eth0";
1283
985
struct ifreq network;
1284
986
int sd = -1;
1285
987
bool take_down_interface = false;
1286
988
uid_t uid;
1287
989
gid_t gid;
990
char *connect_to = NULL;
1288
991
char tempdir[] = "/tmp/mandosXXXXXX";
1289
992
bool tempdir_created = false;
1290
993
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1294
997
bool gnutls_initialized = false;
1295
998
bool gpgme_initialized = false;
1296
999
float delay = 2.5f;
1297
double retry_interval = 10; /* 10s between trying a server and
1298
retrying the same server again */
1299
1000
1300
1001
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1301
1002
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1307
1008
errno = 0;
1308
1009
ret = setgid(gid);
1309
1010
if(ret == -1){
1310
perror_plus("setgid");
1011
perror("setgid");
1311
1012
}
1312
1013
1313
1014
/* Lower user privileges (temporarily) */
1314
1015
errno = 0;
1315
1016
ret = seteuid(uid);
1316
1017
if(ret == -1){
1317
perror_plus("seteuid");
1018
perror("seteuid");
1318
1019
}
1319
1020
1320
1021
if(quit_now){
1355
1056
.arg = "SECONDS",
1356
1057
.doc = "Maximum delay to wait for interface startup",
1357
1058
.group = 2 },
1358
{ .name = "retry", .key = 132,
1359
.arg = "SECONDS",
1360
.doc = "Retry interval used when denied by the mandos server",
1361
.group = 2 },
1362
/*
1363
* These reproduce what we would get without ARGP_NO_HELP
1364
*/
1365
{ .name = "help", .key = '?',
1366
.doc = "Give this help list", .group = -1 },
1367
{ .name = "usage", .key = -3,
1368
.doc = "Give a short usage message", .group = -1 },
1369
{ .name = "version", .key = 'V',
1370
.doc = "Print program version", .group = -1 },
1371
1059
{ .name = NULL }
1372
1060
};
1373
1061
1374
1062
error_t parse_opt(int key, char *arg,
1375
1063
struct argp_state *state){
1376
errno = 0;
1377
1064
switch(key){
1378
1065
case 128: /* --debug */
1379
1066
debug = true;
1395
1082
tmpmax = strtoimax(arg, &tmp, 10);
1396
1083
if(errno != 0 or tmp == arg or *tmp != '\0'
1397
1084
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1398
argp_error(state, "Bad number of DH bits");
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1399
1087
}
1400
1088
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1401
1089
break;
1406
1094
errno = 0;
1407
1095
delay = strtof(arg, &tmp);
1408
1096
if(errno != 0 or tmp == arg or *tmp != '\0'){
1409
argp_error(state, "Bad delay");
1410
}
1411
case 132: /* --retry */
1412
errno = 0;
1413
retry_interval = strtod(arg, &tmp);
1414
if(errno != 0 or tmp == arg or *tmp != '\0'
1415
or (retry_interval * 1000) > INT_MAX
1416
or retry_interval < 0){
1417
argp_error(state, "Bad retry interval");
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
1418
1099
}
1419
1100
break;
1420
/*
1421
* These reproduce what we would get without ARGP_NO_HELP
1422
*/
1423
case '?': /* --help */
1424
argp_state_help(state, state->out_stream,
1425
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1426
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1427
case -3: /* --usage */
1428
argp_state_help(state, state->out_stream,
1429
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1430
case 'V': /* --version */
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1432
exit(argp_err_exit_status);
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
1433
1104
break;
1434
1105
default:
1435
1106
return ARGP_ERR_UNKNOWN;
1436
1107
}
1437
return errno;
1108
return 0;
1438
1109
}
1439
1110
1440
1111
struct argp argp = { .options = options, .parser = parse_opt,
1441
1112
.args_doc = "",
1442
1113
.doc = "Mandos client -- Get and decrypt"
1443
1114
" passwords from a Mandos server" };
1444
ret = argp_parse(&argp, argc, argv,
1445
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1446
switch(ret){
1447
case 0:
1448
break;
1449
case ENOMEM:
1450
default:
1451
errno = ret;
1452
perror_plus("argp_parse");
1453
exitcode = EX_OSERR;
1454
goto end;
1455
case EINVAL:
1456
exitcode = EX_USAGE;
1457
goto end;
1458
}
1459
}
1460
1461
{
1462
/* Work around Debian bug #633582:
1463
<http://bugs.debian.org/633582> */
1464
struct stat st;
1465
1466
/* Re-raise priviliges */
1467
errno = 0;
1468
ret = seteuid(0);
1469
if(ret == -1){
1470
perror_plus("seteuid");
1471
}
1472
1473
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1474
if(seckey_fd == -1){
1475
perror_plus("open");
1476
} else {
1477
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1478
if(ret == -1){
1479
perror_plus("fstat");
1480
} else {
1481
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1482
ret = fchown(seckey_fd, uid, gid);
1483
if(ret == -1){
1484
perror_plus("fchown");
1485
}
1486
}
1487
}
1488
TEMP_FAILURE_RETRY(close(seckey_fd));
1489
}
1490
1491
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1492
if(pubkey_fd == -1){
1493
perror_plus("open");
1494
} else {
1495
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1496
if(ret == -1){
1497
perror_plus("fstat");
1498
} else {
1499
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1500
ret = fchown(pubkey_fd, uid, gid);
1501
if(ret == -1){
1502
perror_plus("fchown");
1503
}
1504
}
1505
}
1506
TEMP_FAILURE_RETRY(close(pubkey_fd));
1507
}
1508
1509
/* Lower privileges */
1510
errno = 0;
1511
ret = seteuid(uid);
1512
if(ret == -1){
1513
perror_plus("seteuid");
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;
1514
1120
}
1515
1121
}
1516
1122
1517
1123
if(not debug){
1518
1124
avahi_set_log_function(empty_log);
1519
1125
}
1520
1521
if(interface[0] == '\0'){
1522
struct dirent **direntries;
1523
ret = scandir(sys_class_net, &direntries, good_interface,
1524
alphasort);
1525
if(ret >= 1){
1526
/* Pick the first good interface */
1527
interface = strdup(direntries[0]->d_name);
1528
if(debug){
1529
fprintf(stderr, "Using interface \"%s\"\n", interface);
1530
}
1531
if(interface == NULL){
1532
perror_plus("malloc");
1533
free(direntries);
1534
exitcode = EXIT_FAILURE;
1535
goto end;
1536
}
1537
free(direntries);
1538
} else {
1539
free(direntries);
1540
fprintf(stderr, "Could not find a network interface\n");
1541
exitcode = EXIT_FAILURE;
1542
goto end;
1543
}
1544
}
1545
1126
1546
1127
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1547
1128
from the signal handler */
1550
1131
mc.simple_poll = avahi_simple_poll_new();
1551
1132
if(mc.simple_poll == NULL){
1552
1133
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1553
exitcode = EX_UNAVAILABLE;
1134
exitcode = EXIT_FAILURE;
1554
1135
goto end;
1555
1136
}
1556
1137
1557
1138
sigemptyset(&sigterm_action.sa_mask);
1558
1139
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1559
1140
if(ret == -1){
1560
perror_plus("sigaddset");
1561
exitcode = EX_OSERR;
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1562
1143
goto end;
1563
1144
}
1564
1145
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1565
1146
if(ret == -1){
1566
perror_plus("sigaddset");
1567
exitcode = EX_OSERR;
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1568
1149
goto end;
1569
1150
}
1570
1151
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1571
1152
if(ret == -1){
1572
perror_plus("sigaddset");
1573
exitcode = EX_OSERR;
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1574
1155
goto end;
1575
1156
}
1576
1157
/* Need to check if the handler is SIG_IGN before handling:
1579
1160
*/
1580
1161
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1581
1162
if(ret == -1){
1582
perror_plus("sigaction");
1583
return EX_OSERR;
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1584
1165
}
1585
1166
if(old_sigterm_action.sa_handler != SIG_IGN){
1586
1167
ret = sigaction(SIGINT, &sigterm_action, NULL);
1587
1168
if(ret == -1){
1588
perror_plus("sigaction");
1589
exitcode = EX_OSERR;
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1590
1171
goto end;
1591
1172
}
1592
1173
}
1593
1174
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1594
1175
if(ret == -1){
1595
perror_plus("sigaction");
1596
return EX_OSERR;
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1597
1178
}
1598
1179
if(old_sigterm_action.sa_handler != SIG_IGN){
1599
1180
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1600
1181
if(ret == -1){
1601
perror_plus("sigaction");
1602
exitcode = EX_OSERR;
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1603
1184
goto end;
1604
1185
}
1605
1186
}
1606
1187
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1607
1188
if(ret == -1){
1608
perror_plus("sigaction");
1609
return EX_OSERR;
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1610
1191
}
1611
1192
if(old_sigterm_action.sa_handler != SIG_IGN){
1612
1193
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1613
1194
if(ret == -1){
1614
perror_plus("sigaction");
1615
exitcode = EX_OSERR;
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1616
1197
goto end;
1617
1198
}
1618
1199
}
1619
1200
1620
1201
/* If the interface is down, bring it up */
1621
if(strcmp(interface, "none") != 0){
1202
if(interface[0] != '\0'){
1622
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
1623
1204
if(if_index == 0){
1624
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1625
exitcode = EX_UNAVAILABLE;
1206
exitcode = EXIT_FAILURE;
1626
1207
goto end;
1627
1208
}
1628
1209
1634
1215
errno = 0;
1635
1216
ret = seteuid(0);
1636
1217
if(ret == -1){
1637
perror_plus("seteuid");
1218
perror("seteuid");
1638
1219
}
1639
1220
1640
1221
#ifdef __linux__
1641
1222
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1642
messages about the network interface to mess up the prompt */
1223
messages to mess up the prompt */
1643
1224
ret = klogctl(8, NULL, 5);
1644
1225
bool restore_loglevel = true;
1645
1226
if(ret == -1){
1646
1227
restore_loglevel = false;
1647
perror_plus("klogctl");
1228
perror("klogctl");
1648
1229
}
1649
1230
#endif /* __linux__ */
1650
1231
1651
1232
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1652
1233
if(sd < 0){
1653
perror_plus("socket");
1654
exitcode = EX_OSERR;
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1655
1236
#ifdef __linux__
1656
1237
if(restore_loglevel){
1657
1238
ret = klogctl(7, NULL, 0);
1658
1239
if(ret == -1){
1659
perror_plus("klogctl");
1240
perror("klogctl");
1660
1241
}
1661
1242
}
1662
1243
#endif /* __linux__ */
1664
1245
errno = 0;
1665
1246
ret = seteuid(uid);
1666
1247
if(ret == -1){
1667
perror_plus("seteuid");
1248
perror("seteuid");
1668
1249
}
1669
1250
goto end;
1670
1251
}
1671
1252
strcpy(network.ifr_name, interface);
1672
1253
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1673
1254
if(ret == -1){
1674
perror_plus("ioctl SIOCGIFFLAGS");
1255
perror("ioctl SIOCGIFFLAGS");
1675
1256
#ifdef __linux__
1676
1257
if(restore_loglevel){
1677
1258
ret = klogctl(7, NULL, 0);
1678
1259
if(ret == -1){
1679
perror_plus("klogctl");
1260
perror("klogctl");
1680
1261
}
1681
1262
}
1682
1263
#endif /* __linux__ */
1683
exitcode = EX_OSERR;
1264
exitcode = EXIT_FAILURE;
1684
1265
/* Lower privileges */
1685
1266
errno = 0;
1686
1267
ret = seteuid(uid);
1687
1268
if(ret == -1){
1688
perror_plus("seteuid");
1269
perror("seteuid");
1689
1270
}
1690
1271
goto end;
1691
1272
}
1695
1276
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1696
1277
if(ret == -1){
1697
1278
take_down_interface = false;
1698
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1699
exitcode = EX_OSERR;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1700
1281
#ifdef __linux__
1701
1282
if(restore_loglevel){
1702
1283
ret = klogctl(7, NULL, 0);
1703
1284
if(ret == -1){
1704
perror_plus("klogctl");
1285
perror("klogctl");
1705
1286
}
1706
1287
}
1707
1288
#endif /* __linux__ */
1709
1290
errno = 0;
1710
1291
ret = seteuid(uid);
1711
1292
if(ret == -1){
1712
perror_plus("seteuid");
1293
perror("seteuid");
1713
1294
}
1714
1295
goto end;
1715
1296
}
1716
1297
}
1717
/* Sleep checking until interface is running.
1718
Check every 0.25s, up to total time of delay */
1298
/* sleep checking until interface is running */
1719
1299
for(int i=0; i < delay * 4; i++){
1720
1300
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1721
1301
if(ret == -1){
1722
perror_plus("ioctl SIOCGIFFLAGS");
1302
perror("ioctl SIOCGIFFLAGS");
1723
1303
} else if(network.ifr_flags & IFF_RUNNING){
1724
1304
break;
1725
1305
}
1726
1306
struct timespec sleeptime = { .tv_nsec = 250000000 };
1727
1307
ret = nanosleep(&sleeptime, NULL);
1728
1308
if(ret == -1 and errno != EINTR){
1729
perror_plus("nanosleep");
1309
perror("nanosleep");
1730
1310
}
1731
1311
}
1732
1312
if(not take_down_interface){
1733
1313
/* We won't need the socket anymore */
1734
1314
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1735
1315
if(ret == -1){
1736
perror_plus("close");
1316
perror("close");
1737
1317
}
1738
1318
}
1739
1319
#ifdef __linux__
1741
1321
/* Restores kernel loglevel to default */
1742
1322
ret = klogctl(7, NULL, 0);
1743
1323
if(ret == -1){
1744
perror_plus("klogctl");
1324
perror("klogctl");
1745
1325
}
1746
1326
}
1747
1327
#endif /* __linux__ */
1751
1331
/* Lower privileges */
1752
1332
ret = seteuid(uid);
1753
1333
if(ret == -1){
1754
perror_plus("seteuid");
1334
perror("seteuid");
1755
1335
}
1756
1336
} else {
1757
1337
/* Lower privileges permanently */
1758
1338
ret = setuid(uid);
1759
1339
if(ret == -1){
1760
perror_plus("setuid");
1340
perror("setuid");
1761
1341
}
1762
1342
}
1763
1343
}
1769
1349
ret = init_gnutls_global(pubkey, seckey);
1770
1350
if(ret == -1){
1771
1351
fprintf(stderr, "init_gnutls_global failed\n");
1772
exitcode = EX_UNAVAILABLE;
1352
exitcode = EXIT_FAILURE;
1773
1353
goto end;
1774
1354
} else {
1775
1355
gnutls_initialized = true;
1779
1359
goto end;
1780
1360
}
1781
1361
1362
tempdir_created = true;
1782
1363
if(mkdtemp(tempdir) == NULL){
1783
perror_plus("mkdtemp");
1364
tempdir_created = false;
1365
perror("mkdtemp");
1784
1366
goto end;
1785
1367
}
1786
tempdir_created = true;
1787
1368
1788
1369
if(quit_now){
1789
1370
goto end;
1791
1372
1792
1373
if(not init_gpgme(pubkey, seckey, tempdir)){
1793
1374
fprintf(stderr, "init_gpgme failed\n");
1794
exitcode = EX_UNAVAILABLE;
1375
exitcode = EXIT_FAILURE;
1795
1376
goto end;
1796
1377
} else {
1797
1378
gpgme_initialized = true;
1807
1388
char *address = strrchr(connect_to, ':');
1808
1389
if(address == NULL){
1809
1390
fprintf(stderr, "No colon in address\n");
1810
exitcode = EX_USAGE;
1391
exitcode = EXIT_FAILURE;
1811
1392
goto end;
1812
1393
}
1813
1394
1821
1402
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1822
1403
or tmpmax != (uint16_t)tmpmax){
1823
1404
fprintf(stderr, "Bad port number\n");
1824
exitcode = EX_USAGE;
1405
exitcode = EXIT_FAILURE;
1825
1406
goto end;
1826
1407
}
1827
1408
1831
1412
1832
1413
port = (uint16_t)tmpmax;
1833
1414
*address = '\0';
1415
address = connect_to;
1834
1416
/* Colon in address indicates IPv6 */
1835
1417
int af;
1836
if(strchr(connect_to, ':') != NULL){
1418
if(strchr(address, ':') != NULL){
1837
1419
af = AF_INET6;
1838
/* Accept [] around IPv6 address - see RFC 5952 */
1839
if(connect_to[0] == '[' and address[-1] == ']')
1840
{
1841
connect_to++;
1842
address[-1] = '\0';
1843
}
1844
1420
} else {
1845
1421
af = AF_INET;
1846
1422
}
1847
address = connect_to;
1848
1423
1849
1424
if(quit_now){
1850
1425
goto end;
1851
1426
}
1852
1427
1853
while(not quit_now){
1854
ret = start_mandos_communication(address, port, if_index, af);
1855
if(quit_now or ret == 0){
1856
break;
1857
}
1858
if(debug){
1859
fprintf(stderr, "Retrying in %d seconds\n",
1860
(int)retry_interval);
1861
}
1862
sleep((int)retry_interval);
1863
};
1864
1865
if (not quit_now){
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
1866
1432
exitcode = EXIT_SUCCESS;
1867
1433
}
1868
1869
1434
goto end;
1870
1435
}
1871
1436
1895
1460
if(mc.server == NULL){
1896
1461
fprintf(stderr, "Failed to create Avahi server: %s\n",
1897
1462
avahi_strerror(error));
1898
exitcode = EX_UNAVAILABLE;
1463
exitcode = EXIT_FAILURE;
1899
1464
goto end;
1900
1465
}
1901
1466
1910
1475
if(sb == NULL){
1911
1476
fprintf(stderr, "Failed to create service browser: %s\n",
1912
1477
avahi_strerror(avahi_server_errno(mc.server)));
1913
exitcode = EX_UNAVAILABLE;
1478
exitcode = EXIT_FAILURE;
1914
1479
goto end;
1915
1480
}
1916
1481
1923
1488
if(debug){
1924
1489
fprintf(stderr, "Starting Avahi loop search\n");
1925
1490
}
1926
1927
ret = avahi_loop_with_timeout(mc.simple_poll,
1928
(int)(retry_interval * 1000));
1929
if(debug){
1930
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1931
(ret == 0) ? "successfully" : "with error");
1932
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
1933
1493
1934
1494
end:
1935
1495
1956
1516
if(gpgme_initialized){
1957
1517
gpgme_release(mc.ctx);
1958
1518
}
1959
1960
/* Cleans up the circular linked list of Mandos servers the client
1961
has seen */
1962
if(mc.current_server != NULL){
1963
mc.current_server->prev->next = NULL;
1964
while(mc.current_server != NULL){
1965
server *next = mc.current_server->next;
1966
free(mc.current_server);
1967
mc.current_server = next;
1968
}
1969
}
1970
1519
1971
1520
/* Take down the network interface */
1972
1521
if(take_down_interface){
1974
1523
errno = 0;
1975
1524
ret = seteuid(0);
1976
1525
if(ret == -1){
1977
perror_plus("seteuid");
1526
perror("seteuid");
1978
1527
}
1979
1528
if(geteuid() == 0){
1980
1529
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1981
1530
if(ret == -1){
1982
perror_plus("ioctl SIOCGIFFLAGS");
1531
perror("ioctl SIOCGIFFLAGS");
1983
1532
} else if(network.ifr_flags & IFF_UP) {
1984
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1985
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1986
1535
if(ret == -1){
1987
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1536
perror("ioctl SIOCSIFFLAGS");
1988
1537
}
1989
1538
}
1990
1539
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1991
1540
if(ret == -1){
1992
perror_plus("close");
1541
perror("close");
1993
1542
}
1994
1543
/* Lower privileges permanently */
1995
1544
errno = 0;
1996
1545
ret = setuid(uid);
1997
1546
if(ret == -1){
1998
perror_plus("setuid");
1547
perror("setuid");
1999
1548
}
2000
1549
}
2001
1550
}
2002
1551
2003
/* Removes the GPGME temp directory and all files inside */
1552
/* Removes the temp directory used by GPGME */
2004
1553
if(tempdir_created){
2005
struct dirent **direntries = NULL;
2006
struct dirent *direntry = NULL;
2007
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
2008
if (ret > 0){
2009
for(int i = 0; i < ret; i++){
2010
direntry = direntries[i];
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
}
2011
1574
char *fullname = NULL;
2012
1575
ret = asprintf(&fullname, "%s/%s", tempdir,
2013
1576
direntry->d_name);
2014
1577
if(ret < 0){
2015
perror_plus("asprintf");
1578
perror("asprintf");
2016
1579
continue;
2017
1580
}
2018
1581
ret = remove(fullname);
2022
1585
}
2023
1586
free(fullname);
2024
1587
}
2025
}
2026
2027
/* need to be cleaned even if ret == 0 because man page doesn't
2028
specify */
2029
free(direntries);
2030
if (ret == -1){
2031
perror_plus("scandir");
1588
closedir(d);
2032
1589
}
2033
1590
ret = rmdir(tempdir);
2034
1591
if(ret == -1 and errno != ENOENT){
2035
perror_plus("rmdir");
1592
perror("rmdir");
2036
1593
}
2037
1594
}
2038
1595
2043
1600
&old_sigterm_action,
2044
1601
NULL));
2045
1602
if(ret == -1){
2046
perror_plus("sigaction");
1603
perror("sigaction");
2047
1604
}
2048
1605
do {
2049
1606
ret = raise(signal_received);
2050
1607
} while(ret != 0 and errno == EINTR);
2051
1608
if(ret != 0){
2052
perror_plus("raise");
1609
perror("raise");
2053
1610
abort();
2054
1611
}
2055
1612
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0