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- Committer: teddy at bsnet
- Date: 2011-11-12 18:14:55 UTC
- mto: This revision was merged to the branch mainline in revision 522.
- Revision ID: teddy@fukt.bsnet.se-20111112181455-8m6z4qrrib33bl2c
* plugins.d/mandos-client.c (SYNOPSIS, OPTIONS): Document
"--network-hook-dir"
option.
"--network-hook-dir"
option.
- 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
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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() */
124
127
bool debug = false;
125
128
static const char mandos_protocol_version[] = "1";
126
129
const char *argp_program_version = "mandos-client " VERSION;
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
const char *argp_program_bug_address = "<mandos@recompile.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
/* 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
165
228
/*
166
229
* Initialize GPGME.
167
230
*/
181
244
182
245
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
183
246
if(fd == -1){
184
perror("open");
247
perror_plus("open");
185
248
return false;
186
249
}
187
250
201
264
202
265
ret = (int)TEMP_FAILURE_RETRY(close(fd));
203
266
if(ret == -1){
204
perror("close");
267
perror_plus("close");
205
268
}
206
269
gpgme_data_release(pgp_data);
207
270
return true;
220
283
return false;
221
284
}
222
285
223
/* Set GPGME home directory for the OpenPGP engine only */
286
/* Set GPGME home directory for the OpenPGP engine only */
224
287
rc = gpgme_get_engine_info(&engine_info);
225
288
if(rc != GPG_ERR_NO_ERROR){
226
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
332
395
333
396
/* Seek back to the beginning of the GPGME plaintext data buffer */
334
397
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
335
perror("gpgme_data_seek");
398
perror_plus("gpgme_data_seek");
336
399
plaintext_length = -1;
337
400
goto decrypt_end;
338
401
}
343
406
(size_t)plaintext_length,
344
407
plaintext_capacity);
345
408
if(plaintext_capacity == 0){
346
perror("incbuffer");
409
perror_plus("incbuffer");
347
410
plaintext_length = -1;
348
411
goto decrypt_end;
349
412
}
356
419
break;
357
420
}
358
421
if(ret < 0){
359
perror("gpgme_data_read");
422
perror_plus("gpgme_data_read");
360
423
plaintext_length = -1;
361
424
goto decrypt_end;
362
425
}
419
482
}
420
483
421
484
/* OpenPGP credentials */
422
gnutls_certificate_allocate_credentials(&mc.cred);
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
423
486
if(ret != GNUTLS_E_SUCCESS){
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
487
fprintf(stderr, "GnuTLS memory error: %s\n",
428
488
safer_gnutls_strerror(ret));
429
489
gnutls_global_deinit();
430
490
return -1;
552
612
gnutls_session_t session;
553
613
int pf; /* Protocol family */
554
614
615
errno = 0;
616
555
617
if(quit_now){
618
errno = EINTR;
556
619
return -1;
557
620
}
558
621
565
628
break;
566
629
default:
567
630
fprintf(stderr, "Bad address family: %d\n", af);
631
errno = EINVAL;
568
632
return -1;
569
633
}
570
634
580
644
581
645
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
646
if(tcp_sd < 0){
583
perror("socket");
647
int e = errno;
648
perror_plus("socket");
649
errno = e;
584
650
goto mandos_end;
585
651
}
586
652
587
653
if(quit_now){
654
errno = EINTR;
588
655
goto mandos_end;
589
656
}
590
657
597
664
ret = inet_pton(af, ip, &to.in.sin_addr);
598
665
}
599
666
if(ret < 0 ){
600
perror("inet_pton");
667
int e = errno;
668
perror_plus("inet_pton");
669
errno = e;
601
670
goto mandos_end;
602
671
}
603
672
if(ret == 0){
673
int e = errno;
604
674
fprintf(stderr, "Bad address: %s\n", ip);
675
errno = e;
605
676
goto mandos_end;
606
677
}
607
678
if(af == AF_INET6){
615
686
if(if_index == AVAHI_IF_UNSPEC){
616
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
617
688
" without a network interface\n");
689
errno = EINVAL;
618
690
goto mandos_end;
619
691
}
620
692
/* Set the network interface number as scope */
627
699
}
628
700
629
701
if(quit_now){
702
errno = EINTR;
630
703
goto mandos_end;
631
704
}
632
705
634
707
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
635
708
char interface[IF_NAMESIZE];
636
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
637
perror("if_indextoname");
710
perror_plus("if_indextoname");
638
711
} else {
639
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
640
713
ip, interface, port);
654
727
sizeof(addrstr));
655
728
}
656
729
if(pcret == NULL){
657
perror("inet_ntop");
730
perror_plus("inet_ntop");
658
731
} else {
659
732
if(strcmp(addrstr, ip) != 0){
660
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
663
736
}
664
737
665
738
if(quit_now){
739
errno = EINTR;
666
740
goto mandos_end;
667
741
}
668
742
672
746
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
673
747
}
674
748
if(ret < 0){
675
perror("connect");
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
int e = errno;
751
perror_plus("connect");
752
errno = e;
753
}
676
754
goto mandos_end;
677
755
}
678
756
679
757
if(quit_now){
758
errno = EINTR;
680
759
goto mandos_end;
681
760
}
682
761
687
766
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
688
767
out_size - written));
689
768
if(ret == -1){
690
perror("write");
769
int e = errno;
770
perror_plus("write");
771
errno = e;
691
772
goto mandos_end;
692
773
}
693
774
written += (size_t)ret;
703
784
}
704
785
705
786
if(quit_now){
787
errno = EINTR;
706
788
goto mandos_end;
707
789
}
708
790
}
712
794
}
713
795
714
796
if(quit_now){
797
errno = EINTR;
715
798
goto mandos_end;
716
799
}
717
800
801
/* Spurious warning from -Wint-to-pointer-cast */
718
802
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
719
803
720
804
if(quit_now){
805
errno = EINTR;
721
806
goto mandos_end;
722
807
}
723
808
724
809
do {
725
810
ret = gnutls_handshake(session);
726
811
if(quit_now){
812
errno = EINTR;
727
813
goto mandos_end;
728
814
}
729
815
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
733
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
734
820
gnutls_perror(ret);
735
821
}
822
errno = EPROTO;
736
823
goto mandos_end;
737
824
}
738
825
746
833
while(true){
747
834
748
835
if(quit_now){
836
errno = EINTR;
749
837
goto mandos_end;
750
838
}
751
839
752
840
buffer_capacity = incbuffer(&buffer, buffer_length,
753
841
buffer_capacity);
754
842
if(buffer_capacity == 0){
755
perror("incbuffer");
843
int e = errno;
844
perror_plus("incbuffer");
845
errno = e;
756
846
goto mandos_end;
757
847
}
758
848
759
849
if(quit_now){
850
errno = EINTR;
760
851
goto mandos_end;
761
852
}
762
853
775
866
ret = gnutls_handshake(session);
776
867
777
868
if(quit_now){
869
errno = EINTR;
778
870
goto mandos_end;
779
871
}
780
872
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
781
873
if(ret < 0){
782
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
783
875
gnutls_perror(ret);
876
errno = EPROTO;
784
877
goto mandos_end;
785
878
}
786
879
break;
788
881
fprintf(stderr, "Unknown error while reading data from"
789
882
" encrypted session with Mandos server\n");
790
883
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
errno = EIO;
791
885
goto mandos_end;
792
886
}
793
887
} else {
800
894
}
801
895
802
896
if(quit_now){
897
errno = EINTR;
803
898
goto mandos_end;
804
899
}
805
900
806
901
do {
807
902
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
808
903
if(quit_now){
904
errno = EINTR;
809
905
goto mandos_end;
810
906
}
811
907
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
820
916
written = 0;
821
917
while(written < (size_t) decrypted_buffer_size){
822
918
if(quit_now){
919
errno = EINTR;
823
920
goto mandos_end;
824
921
}
825
922
827
924
(size_t)decrypted_buffer_size - written,
828
925
stdout);
829
926
if(ret == 0 and ferror(stdout)){
927
int e = errno;
830
928
if(debug){
831
929
fprintf(stderr, "Error writing encrypted data: %s\n",
832
930
strerror(errno));
833
931
}
932
errno = e;
834
933
goto mandos_end;
835
934
}
836
935
written += (size_t)ret;
842
941
/* Shutdown procedure */
843
942
844
943
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;
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
}
856
963
}
857
964
return retval;
858
965
}
901
1008
avahi_proto_to_af(proto));
902
1009
if(ret == 0){
903
1010
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
904
1014
}
905
1015
}
906
1016
}
960
1070
}
961
1071
}
962
1072
963
/* stop main loop after sigterm has been called */
1073
/* Signal handler that stops main loop after SIGTERM */
964
1074
static void handle_sigterm(int sig){
965
1075
if(quit_now){
966
1076
return;
968
1078
quit_now = 1;
969
1079
signal_received = sig;
970
1080
int old_errno = errno;
1081
/* set main loop to exit */
971
1082
if(mc.simple_poll != NULL){
972
1083
avahi_simple_poll_quit(mc.simple_poll);
973
1084
}
974
1085
errno = old_errno;
975
1086
}
976
1087
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
977
1275
int main(int argc, char *argv[]){
978
1276
AvahiSServiceBrowser *sb = NULL;
979
1277
int error;
981
1279
intmax_t tmpmax;
982
1280
char *tmp;
983
1281
int exitcode = EXIT_SUCCESS;
984
const char *interface = "eth0";
1282
const char *interface = "";
985
1283
struct ifreq network;
986
1284
int sd = -1;
987
1285
bool take_down_interface = false;
988
1286
uid_t uid;
989
1287
gid_t gid;
990
char *connect_to = NULL;
991
1288
char tempdir[] = "/tmp/mandosXXXXXX";
992
1289
bool tempdir_created = false;
993
1290
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
997
1294
bool gnutls_initialized = false;
998
1295
bool gpgme_initialized = false;
999
1296
float delay = 2.5f;
1297
double retry_interval = 10; /* 10s between trying a server and
1298
retrying the same server again */
1000
1299
1001
1300
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1002
1301
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1008
1307
errno = 0;
1009
1308
ret = setgid(gid);
1010
1309
if(ret == -1){
1011
perror("setgid");
1310
perror_plus("setgid");
1012
1311
}
1013
1312
1014
1313
/* Lower user privileges (temporarily) */
1015
1314
errno = 0;
1016
1315
ret = seteuid(uid);
1017
1316
if(ret == -1){
1018
perror("seteuid");
1317
perror_plus("seteuid");
1019
1318
}
1020
1319
1021
1320
if(quit_now){
1056
1355
.arg = "SECONDS",
1057
1356
.doc = "Maximum delay to wait for interface startup",
1058
1357
.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 },
1059
1371
{ .name = NULL }
1060
1372
};
1061
1373
1062
1374
error_t parse_opt(int key, char *arg,
1063
1375
struct argp_state *state){
1376
errno = 0;
1064
1377
switch(key){
1065
1378
case 128: /* --debug */
1066
1379
debug = true;
1082
1395
tmpmax = strtoimax(arg, &tmp, 10);
1083
1396
if(errno != 0 or tmp == arg or *tmp != '\0'
1084
1397
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1398
argp_error(state, "Bad number of DH bits");
1087
1399
}
1088
1400
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1089
1401
break;
1094
1406
errno = 0;
1095
1407
delay = strtof(arg, &tmp);
1096
1408
if(errno != 0 or tmp == arg or *tmp != '\0'){
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
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");
1099
1418
}
1100
1419
break;
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
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);
1104
1433
break;
1105
1434
default:
1106
1435
return ARGP_ERR_UNKNOWN;
1107
1436
}
1108
return 0;
1437
return errno;
1109
1438
}
1110
1439
1111
1440
struct argp argp = { .options = options, .parser = parse_opt,
1112
1441
.args_doc = "",
1113
1442
.doc = "Mandos client -- Get and decrypt"
1114
1443
" 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;
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
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1474
int seckey_fd = open(seckey, O_RDONLY);
1475
if(seckey_fd == -1){
1476
perror_plus("open");
1477
} else {
1478
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1479
if(ret == -1){
1480
perror_plus("fstat");
1481
} else {
1482
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1483
ret = fchown(seckey_fd, uid, gid);
1484
if(ret == -1){
1485
perror_plus("fchown");
1486
}
1487
}
1488
}
1489
TEMP_FAILURE_RETRY(close(seckey_fd));
1490
}
1491
}
1492
1493
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1494
int pubkey_fd = open(pubkey, O_RDONLY);
1495
if(pubkey_fd == -1){
1496
perror_plus("open");
1497
} else {
1498
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1499
if(ret == -1){
1500
perror_plus("fstat");
1501
} else {
1502
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1503
ret = fchown(pubkey_fd, uid, gid);
1504
if(ret == -1){
1505
perror_plus("fchown");
1506
}
1507
}
1508
}
1509
TEMP_FAILURE_RETRY(close(pubkey_fd));
1510
}
1511
}
1512
1513
/* Lower privileges */
1514
errno = 0;
1515
ret = seteuid(uid);
1516
if(ret == -1){
1517
perror_plus("seteuid");
1120
1518
}
1121
1519
}
1122
1520
1123
1521
if(not debug){
1124
1522
avahi_set_log_function(empty_log);
1125
1523
}
1524
1525
if(interface[0] == '\0'){
1526
struct dirent **direntries;
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1528
alphasort);
1529
if(ret >= 1){
1530
/* Pick the first good interface */
1531
interface = strdup(direntries[0]->d_name);
1532
if(debug){
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1534
}
1535
if(interface == NULL){
1536
perror_plus("malloc");
1537
free(direntries);
1538
exitcode = EXIT_FAILURE;
1539
goto end;
1540
}
1541
free(direntries);
1542
} else {
1543
free(direntries);
1544
fprintf(stderr, "Could not find a network interface\n");
1545
exitcode = EXIT_FAILURE;
1546
goto end;
1547
}
1548
}
1126
1549
1127
1550
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1128
1551
from the signal handler */
1131
1554
mc.simple_poll = avahi_simple_poll_new();
1132
1555
if(mc.simple_poll == NULL){
1133
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1134
exitcode = EXIT_FAILURE;
1557
exitcode = EX_UNAVAILABLE;
1135
1558
goto end;
1136
1559
}
1137
1560
1138
1561
sigemptyset(&sigterm_action.sa_mask);
1139
1562
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1140
1563
if(ret == -1){
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1564
perror_plus("sigaddset");
1565
exitcode = EX_OSERR;
1143
1566
goto end;
1144
1567
}
1145
1568
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1146
1569
if(ret == -1){
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1570
perror_plus("sigaddset");
1571
exitcode = EX_OSERR;
1149
1572
goto end;
1150
1573
}
1151
1574
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1152
1575
if(ret == -1){
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1576
perror_plus("sigaddset");
1577
exitcode = EX_OSERR;
1155
1578
goto end;
1156
1579
}
1157
1580
/* Need to check if the handler is SIG_IGN before handling:
1160
1583
*/
1161
1584
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1162
1585
if(ret == -1){
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1586
perror_plus("sigaction");
1587
return EX_OSERR;
1165
1588
}
1166
1589
if(old_sigterm_action.sa_handler != SIG_IGN){
1167
1590
ret = sigaction(SIGINT, &sigterm_action, NULL);
1168
1591
if(ret == -1){
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1592
perror_plus("sigaction");
1593
exitcode = EX_OSERR;
1171
1594
goto end;
1172
1595
}
1173
1596
}
1174
1597
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1175
1598
if(ret == -1){
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1599
perror_plus("sigaction");
1600
return EX_OSERR;
1178
1601
}
1179
1602
if(old_sigterm_action.sa_handler != SIG_IGN){
1180
1603
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1181
1604
if(ret == -1){
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1605
perror_plus("sigaction");
1606
exitcode = EX_OSERR;
1184
1607
goto end;
1185
1608
}
1186
1609
}
1187
1610
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1188
1611
if(ret == -1){
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1612
perror_plus("sigaction");
1613
return EX_OSERR;
1191
1614
}
1192
1615
if(old_sigterm_action.sa_handler != SIG_IGN){
1193
1616
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1194
1617
if(ret == -1){
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1618
perror_plus("sigaction");
1619
exitcode = EX_OSERR;
1197
1620
goto end;
1198
1621
}
1199
1622
}
1200
1623
1201
1624
/* If the interface is down, bring it up */
1202
if(interface[0] != '\0'){
1625
if(strcmp(interface, "none") != 0){
1203
1626
if_index = (AvahiIfIndex) if_nametoindex(interface);
1204
1627
if(if_index == 0){
1205
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1206
exitcode = EXIT_FAILURE;
1629
exitcode = EX_UNAVAILABLE;
1207
1630
goto end;
1208
1631
}
1209
1632
1215
1638
errno = 0;
1216
1639
ret = seteuid(0);
1217
1640
if(ret == -1){
1218
perror("seteuid");
1641
perror_plus("seteuid");
1219
1642
}
1220
1643
1221
1644
#ifdef __linux__
1222
1645
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1223
messages to mess up the prompt */
1646
messages about the network interface to mess up the prompt */
1224
1647
ret = klogctl(8, NULL, 5);
1225
1648
bool restore_loglevel = true;
1226
1649
if(ret == -1){
1227
1650
restore_loglevel = false;
1228
perror("klogctl");
1651
perror_plus("klogctl");
1229
1652
}
1230
1653
#endif /* __linux__ */
1231
1654
1232
1655
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1233
1656
if(sd < 0){
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1657
perror_plus("socket");
1658
exitcode = EX_OSERR;
1236
1659
#ifdef __linux__
1237
1660
if(restore_loglevel){
1238
1661
ret = klogctl(7, NULL, 0);
1239
1662
if(ret == -1){
1240
perror("klogctl");
1663
perror_plus("klogctl");
1241
1664
}
1242
1665
}
1243
1666
#endif /* __linux__ */
1245
1668
errno = 0;
1246
1669
ret = seteuid(uid);
1247
1670
if(ret == -1){
1248
perror("seteuid");
1671
perror_plus("seteuid");
1249
1672
}
1250
1673
goto end;
1251
1674
}
1252
1675
strcpy(network.ifr_name, interface);
1253
1676
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1254
1677
if(ret == -1){
1255
perror("ioctl SIOCGIFFLAGS");
1678
perror_plus("ioctl SIOCGIFFLAGS");
1256
1679
#ifdef __linux__
1257
1680
if(restore_loglevel){
1258
1681
ret = klogctl(7, NULL, 0);
1259
1682
if(ret == -1){
1260
perror("klogctl");
1683
perror_plus("klogctl");
1261
1684
}
1262
1685
}
1263
1686
#endif /* __linux__ */
1264
exitcode = EXIT_FAILURE;
1687
exitcode = EX_OSERR;
1265
1688
/* Lower privileges */
1266
1689
errno = 0;
1267
1690
ret = seteuid(uid);
1268
1691
if(ret == -1){
1269
perror("seteuid");
1692
perror_plus("seteuid");
1270
1693
}
1271
1694
goto end;
1272
1695
}
1276
1699
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1277
1700
if(ret == -1){
1278
1701
take_down_interface = false;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1702
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1703
exitcode = EX_OSERR;
1281
1704
#ifdef __linux__
1282
1705
if(restore_loglevel){
1283
1706
ret = klogctl(7, NULL, 0);
1284
1707
if(ret == -1){
1285
perror("klogctl");
1708
perror_plus("klogctl");
1286
1709
}
1287
1710
}
1288
1711
#endif /* __linux__ */
1290
1713
errno = 0;
1291
1714
ret = seteuid(uid);
1292
1715
if(ret == -1){
1293
perror("seteuid");
1716
perror_plus("seteuid");
1294
1717
}
1295
1718
goto end;
1296
1719
}
1297
1720
}
1298
/* sleep checking until interface is running */
1721
/* Sleep checking until interface is running.
1722
Check every 0.25s, up to total time of delay */
1299
1723
for(int i=0; i < delay * 4; i++){
1300
1724
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1301
1725
if(ret == -1){
1302
perror("ioctl SIOCGIFFLAGS");
1726
perror_plus("ioctl SIOCGIFFLAGS");
1303
1727
} else if(network.ifr_flags & IFF_RUNNING){
1304
1728
break;
1305
1729
}
1306
1730
struct timespec sleeptime = { .tv_nsec = 250000000 };
1307
1731
ret = nanosleep(&sleeptime, NULL);
1308
1732
if(ret == -1 and errno != EINTR){
1309
perror("nanosleep");
1733
perror_plus("nanosleep");
1310
1734
}
1311
1735
}
1312
1736
if(not take_down_interface){
1313
1737
/* We won't need the socket anymore */
1314
1738
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1315
1739
if(ret == -1){
1316
perror("close");
1740
perror_plus("close");
1317
1741
}
1318
1742
}
1319
1743
#ifdef __linux__
1321
1745
/* Restores kernel loglevel to default */
1322
1746
ret = klogctl(7, NULL, 0);
1323
1747
if(ret == -1){
1324
perror("klogctl");
1748
perror_plus("klogctl");
1325
1749
}
1326
1750
}
1327
1751
#endif /* __linux__ */
1331
1755
/* Lower privileges */
1332
1756
ret = seteuid(uid);
1333
1757
if(ret == -1){
1334
perror("seteuid");
1758
perror_plus("seteuid");
1335
1759
}
1336
1760
} else {
1337
1761
/* Lower privileges permanently */
1338
1762
ret = setuid(uid);
1339
1763
if(ret == -1){
1340
perror("setuid");
1764
perror_plus("setuid");
1341
1765
}
1342
1766
}
1343
1767
}
1349
1773
ret = init_gnutls_global(pubkey, seckey);
1350
1774
if(ret == -1){
1351
1775
fprintf(stderr, "init_gnutls_global failed\n");
1352
exitcode = EXIT_FAILURE;
1776
exitcode = EX_UNAVAILABLE;
1353
1777
goto end;
1354
1778
} else {
1355
1779
gnutls_initialized = true;
1359
1783
goto end;
1360
1784
}
1361
1785
1786
if(mkdtemp(tempdir) == NULL){
1787
perror_plus("mkdtemp");
1788
goto end;
1789
}
1362
1790
tempdir_created = true;
1363
if(mkdtemp(tempdir) == NULL){
1364
tempdir_created = false;
1365
perror("mkdtemp");
1366
goto end;
1367
}
1368
1791
1369
1792
if(quit_now){
1370
1793
goto end;
1372
1795
1373
1796
if(not init_gpgme(pubkey, seckey, tempdir)){
1374
1797
fprintf(stderr, "init_gpgme failed\n");
1375
exitcode = EXIT_FAILURE;
1798
exitcode = EX_UNAVAILABLE;
1376
1799
goto end;
1377
1800
} else {
1378
1801
gpgme_initialized = true;
1388
1811
char *address = strrchr(connect_to, ':');
1389
1812
if(address == NULL){
1390
1813
fprintf(stderr, "No colon in address\n");
1391
exitcode = EXIT_FAILURE;
1814
exitcode = EX_USAGE;
1392
1815
goto end;
1393
1816
}
1394
1817
1402
1825
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1403
1826
or tmpmax != (uint16_t)tmpmax){
1404
1827
fprintf(stderr, "Bad port number\n");
1405
exitcode = EXIT_FAILURE;
1828
exitcode = EX_USAGE;
1406
1829
goto end;
1407
1830
}
1408
1831
1412
1835
1413
1836
port = (uint16_t)tmpmax;
1414
1837
*address = '\0';
1415
address = connect_to;
1416
1838
/* Colon in address indicates IPv6 */
1417
1839
int af;
1418
if(strchr(address, ':') != NULL){
1840
if(strchr(connect_to, ':') != NULL){
1419
1841
af = AF_INET6;
1842
/* Accept [] around IPv6 address - see RFC 5952 */
1843
if(connect_to[0] == '[' and address[-1] == ']')
1844
{
1845
connect_to++;
1846
address[-1] = '\0';
1847
}
1420
1848
} else {
1421
1849
af = AF_INET;
1422
1850
}
1851
address = connect_to;
1423
1852
1424
1853
if(quit_now){
1425
1854
goto end;
1426
1855
}
1427
1856
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
1857
while(not quit_now){
1858
ret = start_mandos_communication(address, port, if_index, af);
1859
if(quit_now or ret == 0){
1860
break;
1861
}
1862
if(debug){
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
1865
}
1866
sleep((int)retry_interval);
1867
}
1868
1869
if (not quit_now){
1432
1870
exitcode = EXIT_SUCCESS;
1433
1871
}
1872
1434
1873
goto end;
1435
1874
}
1436
1875
1460
1899
if(mc.server == NULL){
1461
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
1462
1901
avahi_strerror(error));
1463
exitcode = EXIT_FAILURE;
1902
exitcode = EX_UNAVAILABLE;
1464
1903
goto end;
1465
1904
}
1466
1905
1475
1914
if(sb == NULL){
1476
1915
fprintf(stderr, "Failed to create service browser: %s\n",
1477
1916
avahi_strerror(avahi_server_errno(mc.server)));
1478
exitcode = EXIT_FAILURE;
1917
exitcode = EX_UNAVAILABLE;
1479
1918
goto end;
1480
1919
}
1481
1920
1488
1927
if(debug){
1489
1928
fprintf(stderr, "Starting Avahi loop search\n");
1490
1929
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
1930
1931
ret = avahi_loop_with_timeout(mc.simple_poll,
1932
(int)(retry_interval * 1000));
1933
if(debug){
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1935
(ret == 0) ? "successfully" : "with error");
1936
}
1493
1937
1494
1938
end:
1495
1939
1516
1960
if(gpgme_initialized){
1517
1961
gpgme_release(mc.ctx);
1518
1962
}
1963
1964
/* Cleans up the circular linked list of Mandos servers the client
1965
has seen */
1966
if(mc.current_server != NULL){
1967
mc.current_server->prev->next = NULL;
1968
while(mc.current_server != NULL){
1969
server *next = mc.current_server->next;
1970
free(mc.current_server);
1971
mc.current_server = next;
1972
}
1973
}
1519
1974
1520
1975
/* Take down the network interface */
1521
1976
if(take_down_interface){
1523
1978
errno = 0;
1524
1979
ret = seteuid(0);
1525
1980
if(ret == -1){
1526
perror("seteuid");
1981
perror_plus("seteuid");
1527
1982
}
1528
1983
if(geteuid() == 0){
1529
1984
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1530
1985
if(ret == -1){
1531
perror("ioctl SIOCGIFFLAGS");
1986
perror_plus("ioctl SIOCGIFFLAGS");
1532
1987
} else if(network.ifr_flags & IFF_UP) {
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1988
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1534
1989
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1535
1990
if(ret == -1){
1536
perror("ioctl SIOCSIFFLAGS");
1991
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1537
1992
}
1538
1993
}
1539
1994
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1540
1995
if(ret == -1){
1541
perror("close");
1996
perror_plus("close");
1542
1997
}
1543
1998
/* Lower privileges permanently */
1544
1999
errno = 0;
1545
2000
ret = setuid(uid);
1546
2001
if(ret == -1){
1547
perror("setuid");
2002
perror_plus("setuid");
1548
2003
}
1549
2004
}
1550
2005
}
1551
2006
1552
/* Removes the temp directory used by GPGME */
2007
/* Removes the GPGME temp directory and all files inside */
1553
2008
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
}
2009
struct dirent **direntries = NULL;
2010
struct dirent *direntry = NULL;
2011
int numentries = scandir(tempdir, &direntries, notdotentries,
2012
alphasort);
2013
if (numentries > 0){
2014
for(int i = 0; i < numentries; i++){
2015
direntry = direntries[i];
1574
2016
char *fullname = NULL;
1575
2017
ret = asprintf(&fullname, "%s/%s", tempdir,
1576
2018
direntry->d_name);
1577
2019
if(ret < 0){
1578
perror("asprintf");
2020
perror_plus("asprintf");
1579
2021
continue;
1580
2022
}
1581
2023
ret = remove(fullname);
1585
2027
}
1586
2028
free(fullname);
1587
2029
}
1588
closedir(d);
2030
}
2031
2032
/* need to clean even if 0 because man page doesn't specify */
2033
free(direntries);
2034
if (numentries == -1){
2035
perror_plus("scandir");
1589
2036
}
1590
2037
ret = rmdir(tempdir);
1591
2038
if(ret == -1 and errno != ENOENT){
1592
perror("rmdir");
2039
perror_plus("rmdir");
1593
2040
}
1594
2041
}
1595
2042
1600
2047
&old_sigterm_action,
1601
2048
NULL));
1602
2049
if(ret == -1){
1603
perror("sigaction");
2050
perror_plus("sigaction");
1604
2051
}
1605
2052
do {
1606
2053
ret = raise(signal_received);
1607
2054
} while(ret != 0 and errno == EINTR);
1608
2055
if(ret != 0){
1609
perror("raise");
2056
perror_plus("raise");
1610
2057
abort();
1611
2058
}
1612
2059
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0