To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 394
- compare with another revision
- download diff
- download tarball
- view history from revision 394
- Committer: Teddy Hogeborn
- Date: 2009-10-24 19:17:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20091024191752-7g6xlf6wpp2pdexb
Convert some programs to use the exit codes from <sysexits.h>. Change
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
- 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 */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
88
86
89
87
#ifdef __linux__
90
88
#include <sys/klog.h> /* klogctl() */
128
126
static const char mandos_protocol_version[] = "1";
129
127
const char *argp_program_version = "mandos-client " VERSION;
130
128
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
129
145
130
/* Used for passing in values through the Avahi callback functions */
146
131
typedef struct {
151
136
gnutls_dh_params_t dh_params;
152
137
const char *priority;
153
138
gpgme_ctx_t ctx;
154
server *current_server;
155
139
} mandos_context;
156
140
157
141
/* global context so signal handler can reach it*/
158
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
143
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
162
145
163
146
sig_atomic_t quit_now = 0;
164
147
int signal_received = 0;
165
148
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
149
/*
174
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
151
* bytes. "buffer_capacity" is how much is currently allocated,
187
163
return buffer_capacity;
188
164
}
189
165
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
166
/*
229
167
* Initialize GPGME.
230
168
*/
244
182
245
183
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
246
184
if(fd == -1){
247
perror_plus("open");
185
perror("open");
248
186
return false;
249
187
}
250
188
264
202
265
203
ret = (int)TEMP_FAILURE_RETRY(close(fd));
266
204
if(ret == -1){
267
perror_plus("close");
205
perror("close");
268
206
}
269
207
gpgme_data_release(pgp_data);
270
208
return true;
283
221
return false;
284
222
}
285
223
286
/* Set GPGME home directory for the OpenPGP engine only */
224
/* Set GPGME home directory for the OpenPGP engine only */
287
225
rc = gpgme_get_engine_info(&engine_info);
288
226
if(rc != GPG_ERR_NO_ERROR){
289
227
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
395
333
396
334
/* Seek back to the beginning of the GPGME plaintext data buffer */
397
335
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
398
perror_plus("gpgme_data_seek");
336
perror("gpgme_data_seek");
399
337
plaintext_length = -1;
400
338
goto decrypt_end;
401
339
}
406
344
(size_t)plaintext_length,
407
345
plaintext_capacity);
408
346
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
347
perror("incbuffer");
410
348
plaintext_length = -1;
411
349
goto decrypt_end;
412
350
}
419
357
break;
420
358
}
421
359
if(ret < 0){
422
perror_plus("gpgme_data_read");
360
perror("gpgme_data_read");
423
361
plaintext_length = -1;
424
362
goto decrypt_end;
425
363
}
482
420
}
483
421
484
422
/* OpenPGP credentials */
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
423
gnutls_certificate_allocate_credentials(&mc.cred);
486
424
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
488
429
safer_gnutls_strerror(ret));
489
430
gnutls_global_deinit();
490
431
return -1;
612
553
gnutls_session_t session;
613
554
int pf; /* Protocol family */
614
555
615
errno = 0;
616
617
556
if(quit_now){
618
errno = EINTR;
619
557
return -1;
620
558
}
621
559
628
566
break;
629
567
default:
630
568
fprintf(stderr, "Bad address family: %d\n", af);
631
errno = EINVAL;
632
569
return -1;
633
570
}
634
571
644
581
645
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
646
583
if(tcp_sd < 0){
647
int e = errno;
648
perror_plus("socket");
649
errno = e;
584
perror("socket");
650
585
goto mandos_end;
651
586
}
652
587
653
588
if(quit_now){
654
errno = EINTR;
655
589
goto mandos_end;
656
590
}
657
591
664
598
ret = inet_pton(af, ip, &to.in.sin_addr);
665
599
}
666
600
if(ret < 0 ){
667
int e = errno;
668
perror_plus("inet_pton");
669
errno = e;
601
perror("inet_pton");
670
602
goto mandos_end;
671
603
}
672
604
if(ret == 0){
673
int e = errno;
674
605
fprintf(stderr, "Bad address: %s\n", ip);
675
errno = e;
676
606
goto mandos_end;
677
607
}
678
608
if(af == AF_INET6){
686
616
if(if_index == AVAHI_IF_UNSPEC){
687
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
688
618
" without a network interface\n");
689
errno = EINVAL;
690
619
goto mandos_end;
691
620
}
692
621
/* Set the network interface number as scope */
699
628
}
700
629
701
630
if(quit_now){
702
errno = EINTR;
703
631
goto mandos_end;
704
632
}
705
633
707
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
708
636
char interface[IF_NAMESIZE];
709
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
638
perror("if_indextoname");
711
639
} else {
712
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
641
ip, interface, port);
727
655
sizeof(addrstr));
728
656
}
729
657
if(pcret == NULL){
730
perror_plus("inet_ntop");
658
perror("inet_ntop");
731
659
} else {
732
660
if(strcmp(addrstr, ip) != 0){
733
661
fprintf(stderr, "Canonical address form: %s\n", addrstr);
736
664
}
737
665
738
666
if(quit_now){
739
errno = EINTR;
740
667
goto mandos_end;
741
668
}
742
669
746
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
747
674
}
748
675
if(ret < 0){
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
int e = errno;
751
perror_plus("connect");
752
errno = e;
753
}
676
perror("connect");
754
677
goto mandos_end;
755
678
}
756
679
757
680
if(quit_now){
758
errno = EINTR;
759
681
goto mandos_end;
760
682
}
761
683
766
688
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
767
689
out_size - written));
768
690
if(ret == -1){
769
int e = errno;
770
perror_plus("write");
771
errno = e;
691
perror("write");
772
692
goto mandos_end;
773
693
}
774
694
written += (size_t)ret;
784
704
}
785
705
786
706
if(quit_now){
787
errno = EINTR;
788
707
goto mandos_end;
789
708
}
790
709
}
794
713
}
795
714
796
715
if(quit_now){
797
errno = EINTR;
798
716
goto mandos_end;
799
717
}
800
718
801
/* Spurious warning from -Wint-to-pointer-cast */
802
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
803
720
804
721
if(quit_now){
805
errno = EINTR;
806
722
goto mandos_end;
807
723
}
808
724
809
725
do {
810
726
ret = gnutls_handshake(session);
811
727
if(quit_now){
812
errno = EINTR;
813
728
goto mandos_end;
814
729
}
815
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
819
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
820
735
gnutls_perror(ret);
821
736
}
822
errno = EPROTO;
823
737
goto mandos_end;
824
738
}
825
739
833
747
while(true){
834
748
835
749
if(quit_now){
836
errno = EINTR;
837
750
goto mandos_end;
838
751
}
839
752
840
753
buffer_capacity = incbuffer(&buffer, buffer_length,
841
754
buffer_capacity);
842
755
if(buffer_capacity == 0){
843
int e = errno;
844
perror_plus("incbuffer");
845
errno = e;
756
perror("incbuffer");
846
757
goto mandos_end;
847
758
}
848
759
849
760
if(quit_now){
850
errno = EINTR;
851
761
goto mandos_end;
852
762
}
853
763
866
776
ret = gnutls_handshake(session);
867
777
868
778
if(quit_now){
869
errno = EINTR;
870
779
goto mandos_end;
871
780
}
872
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
873
782
if(ret < 0){
874
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
875
784
gnutls_perror(ret);
876
errno = EPROTO;
877
785
goto mandos_end;
878
786
}
879
787
break;
881
789
fprintf(stderr, "Unknown error while reading data from"
882
790
" encrypted session with Mandos server\n");
883
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
errno = EIO;
885
792
goto mandos_end;
886
793
}
887
794
} else {
894
801
}
895
802
896
803
if(quit_now){
897
errno = EINTR;
898
804
goto mandos_end;
899
805
}
900
806
901
807
do {
902
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
903
809
if(quit_now){
904
errno = EINTR;
905
810
goto mandos_end;
906
811
}
907
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
916
821
written = 0;
917
822
while(written < (size_t) decrypted_buffer_size){
918
823
if(quit_now){
919
errno = EINTR;
920
824
goto mandos_end;
921
825
}
922
826
924
828
(size_t)decrypted_buffer_size - written,
925
829
stdout);
926
830
if(ret == 0 and ferror(stdout)){
927
int e = errno;
928
831
if(debug){
929
832
fprintf(stderr, "Error writing encrypted data: %s\n",
930
833
strerror(errno));
931
834
}
932
errno = e;
933
835
goto mandos_end;
934
836
}
935
837
written += (size_t)ret;
941
843
/* Shutdown procedure */
942
844
943
845
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
}
846
free(decrypted_buffer);
847
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
851
if(ret == -1){
852
perror("close");
853
}
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
963
857
}
964
858
return retval;
965
859
}
1008
902
avahi_proto_to_af(proto));
1009
903
if(ret == 0){
1010
904
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1014
905
}
1015
906
}
1016
907
}
1070
961
}
1071
962
}
1072
963
1073
/* Signal handler that stops main loop after SIGTERM */
964
/* stop main loop after sigterm has been called */
1074
965
static void handle_sigterm(int sig){
1075
966
if(quit_now){
1076
967
return;
1078
969
quit_now = 1;
1079
970
signal_received = sig;
1080
971
int old_errno = errno;
1081
/* set main loop to exit */
1082
972
if(mc.simple_poll != NULL){
1083
973
avahi_simple_poll_quit(mc.simple_poll);
1084
974
}
1085
975
errno = old_errno;
1086
976
}
1087
977
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
978
int main(int argc, char *argv[]){
1276
979
AvahiSServiceBrowser *sb = NULL;
1277
980
int error;
1279
982
intmax_t tmpmax;
1280
983
char *tmp;
1281
984
int exitcode = EXIT_SUCCESS;
1282
const char *interface = "";
985
const char *interface = "eth0";
1283
986
struct ifreq network;
1284
987
int sd = -1;
1285
988
bool take_down_interface = false;
1286
989
uid_t uid;
1287
990
gid_t gid;
991
char *connect_to = NULL;
1288
992
char tempdir[] = "/tmp/mandosXXXXXX";
1289
993
bool tempdir_created = false;
1290
994
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1294
998
bool gnutls_initialized = false;
1295
999
bool gpgme_initialized = false;
1296
1000
float delay = 2.5f;
1297
double retry_interval = 10; /* 10s between trying a server and
1298
retrying the same server again */
1299
1001
1300
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1301
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1307
1009
errno = 0;
1308
1010
ret = setgid(gid);
1309
1011
if(ret == -1){
1310
perror_plus("setgid");
1012
perror("setgid");
1311
1013
}
1312
1014
1313
1015
/* Lower user privileges (temporarily) */
1314
1016
errno = 0;
1315
1017
ret = seteuid(uid);
1316
1018
if(ret == -1){
1317
perror_plus("seteuid");
1019
perror("seteuid");
1318
1020
}
1319
1021
1320
1022
if(quit_now){
1355
1057
.arg = "SECONDS",
1356
1058
.doc = "Maximum delay to wait for interface startup",
1357
1059
.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
1060
/*
1363
1061
* These reproduce what we would get without ARGP_NO_HELP
1364
1062
*/
1408
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1409
1107
argp_error(state, "Bad delay");
1410
1108
}
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");
1418
}
1419
1109
break;
1420
1110
/*
1421
1111
* These reproduce what we would get without ARGP_NO_HELP
1449
1139
case ENOMEM:
1450
1140
default:
1451
1141
errno = ret;
1452
perror_plus("argp_parse");
1142
perror("argp_parse");
1453
1143
exitcode = EX_OSERR;
1454
1144
goto end;
1455
1145
case EINVAL:
1457
1147
goto end;
1458
1148
}
1459
1149
}
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");
1518
}
1519
}
1520
1150
1521
1151
if(not debug){
1522
1152
avahi_set_log_function(empty_log);
1523
1153
}
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
}
1549
1154
1550
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1551
1156
from the signal handler */
1554
1159
mc.simple_poll = avahi_simple_poll_new();
1555
1160
if(mc.simple_poll == NULL){
1556
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1557
exitcode = EX_UNAVAILABLE;
1162
exitcode = EXIT_FAILURE;
1558
1163
goto end;
1559
1164
}
1560
1165
1561
1166
sigemptyset(&sigterm_action.sa_mask);
1562
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1563
1168
if(ret == -1){
1564
perror_plus("sigaddset");
1565
exitcode = EX_OSERR;
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1566
1171
goto end;
1567
1172
}
1568
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1569
1174
if(ret == -1){
1570
perror_plus("sigaddset");
1571
exitcode = EX_OSERR;
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1572
1177
goto end;
1573
1178
}
1574
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1575
1180
if(ret == -1){
1576
perror_plus("sigaddset");
1577
exitcode = EX_OSERR;
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1578
1183
goto end;
1579
1184
}
1580
1185
/* Need to check if the handler is SIG_IGN before handling:
1583
1188
*/
1584
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1585
1190
if(ret == -1){
1586
perror_plus("sigaction");
1587
return EX_OSERR;
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1588
1193
}
1589
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1590
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1591
1196
if(ret == -1){
1592
perror_plus("sigaction");
1593
exitcode = EX_OSERR;
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1594
1199
goto end;
1595
1200
}
1596
1201
}
1597
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1598
1203
if(ret == -1){
1599
perror_plus("sigaction");
1600
return EX_OSERR;
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1601
1206
}
1602
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1603
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1604
1209
if(ret == -1){
1605
perror_plus("sigaction");
1606
exitcode = EX_OSERR;
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1607
1212
goto end;
1608
1213
}
1609
1214
}
1610
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1611
1216
if(ret == -1){
1612
perror_plus("sigaction");
1613
return EX_OSERR;
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1614
1219
}
1615
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1616
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1617
1222
if(ret == -1){
1618
perror_plus("sigaction");
1619
exitcode = EX_OSERR;
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1620
1225
goto end;
1621
1226
}
1622
1227
}
1623
1228
1624
1229
/* If the interface is down, bring it up */
1625
if(strcmp(interface, "none") != 0){
1230
if(interface[0] != '\0'){
1626
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1627
1232
if(if_index == 0){
1628
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1629
exitcode = EX_UNAVAILABLE;
1234
exitcode = EXIT_FAILURE;
1630
1235
goto end;
1631
1236
}
1632
1237
1638
1243
errno = 0;
1639
1244
ret = seteuid(0);
1640
1245
if(ret == -1){
1641
perror_plus("seteuid");
1246
perror("seteuid");
1642
1247
}
1643
1248
1644
1249
#ifdef __linux__
1648
1253
bool restore_loglevel = true;
1649
1254
if(ret == -1){
1650
1255
restore_loglevel = false;
1651
perror_plus("klogctl");
1256
perror("klogctl");
1652
1257
}
1653
1258
#endif /* __linux__ */
1654
1259
1655
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1656
1261
if(sd < 0){
1657
perror_plus("socket");
1658
exitcode = EX_OSERR;
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1659
1264
#ifdef __linux__
1660
1265
if(restore_loglevel){
1661
1266
ret = klogctl(7, NULL, 0);
1662
1267
if(ret == -1){
1663
perror_plus("klogctl");
1268
perror("klogctl");
1664
1269
}
1665
1270
}
1666
1271
#endif /* __linux__ */
1668
1273
errno = 0;
1669
1274
ret = seteuid(uid);
1670
1275
if(ret == -1){
1671
perror_plus("seteuid");
1276
perror("seteuid");
1672
1277
}
1673
1278
goto end;
1674
1279
}
1675
1280
strcpy(network.ifr_name, interface);
1676
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1677
1282
if(ret == -1){
1678
perror_plus("ioctl SIOCGIFFLAGS");
1283
perror("ioctl SIOCGIFFLAGS");
1679
1284
#ifdef __linux__
1680
1285
if(restore_loglevel){
1681
1286
ret = klogctl(7, NULL, 0);
1682
1287
if(ret == -1){
1683
perror_plus("klogctl");
1288
perror("klogctl");
1684
1289
}
1685
1290
}
1686
1291
#endif /* __linux__ */
1687
exitcode = EX_OSERR;
1292
exitcode = EXIT_FAILURE;
1688
1293
/* Lower privileges */
1689
1294
errno = 0;
1690
1295
ret = seteuid(uid);
1691
1296
if(ret == -1){
1692
perror_plus("seteuid");
1297
perror("seteuid");
1693
1298
}
1694
1299
goto end;
1695
1300
}
1699
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1700
1305
if(ret == -1){
1701
1306
take_down_interface = false;
1702
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1703
exitcode = EX_OSERR;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
1704
1309
#ifdef __linux__
1705
1310
if(restore_loglevel){
1706
1311
ret = klogctl(7, NULL, 0);
1707
1312
if(ret == -1){
1708
perror_plus("klogctl");
1313
perror("klogctl");
1709
1314
}
1710
1315
}
1711
1316
#endif /* __linux__ */
1713
1318
errno = 0;
1714
1319
ret = seteuid(uid);
1715
1320
if(ret == -1){
1716
perror_plus("seteuid");
1321
perror("seteuid");
1717
1322
}
1718
1323
goto end;
1719
1324
}
1720
1325
}
1721
/* Sleep checking until interface is running.
1722
Check every 0.25s, up to total time of delay */
1326
/* sleep checking until interface is running */
1723
1327
for(int i=0; i < delay * 4; i++){
1724
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1725
1329
if(ret == -1){
1726
perror_plus("ioctl SIOCGIFFLAGS");
1330
perror("ioctl SIOCGIFFLAGS");
1727
1331
} else if(network.ifr_flags & IFF_RUNNING){
1728
1332
break;
1729
1333
}
1730
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1731
1335
ret = nanosleep(&sleeptime, NULL);
1732
1336
if(ret == -1 and errno != EINTR){
1733
perror_plus("nanosleep");
1337
perror("nanosleep");
1734
1338
}
1735
1339
}
1736
1340
if(not take_down_interface){
1737
1341
/* We won't need the socket anymore */
1738
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1739
1343
if(ret == -1){
1740
perror_plus("close");
1344
perror("close");
1741
1345
}
1742
1346
}
1743
1347
#ifdef __linux__
1745
1349
/* Restores kernel loglevel to default */
1746
1350
ret = klogctl(7, NULL, 0);
1747
1351
if(ret == -1){
1748
perror_plus("klogctl");
1352
perror("klogctl");
1749
1353
}
1750
1354
}
1751
1355
#endif /* __linux__ */
1755
1359
/* Lower privileges */
1756
1360
ret = seteuid(uid);
1757
1361
if(ret == -1){
1758
perror_plus("seteuid");
1362
perror("seteuid");
1759
1363
}
1760
1364
} else {
1761
1365
/* Lower privileges permanently */
1762
1366
ret = setuid(uid);
1763
1367
if(ret == -1){
1764
perror_plus("setuid");
1368
perror("setuid");
1765
1369
}
1766
1370
}
1767
1371
}
1773
1377
ret = init_gnutls_global(pubkey, seckey);
1774
1378
if(ret == -1){
1775
1379
fprintf(stderr, "init_gnutls_global failed\n");
1776
exitcode = EX_UNAVAILABLE;
1380
exitcode = EXIT_FAILURE;
1777
1381
goto end;
1778
1382
} else {
1779
1383
gnutls_initialized = true;
1783
1387
goto end;
1784
1388
}
1785
1389
1390
tempdir_created = true;
1786
1391
if(mkdtemp(tempdir) == NULL){
1787
perror_plus("mkdtemp");
1392
tempdir_created = false;
1393
perror("mkdtemp");
1788
1394
goto end;
1789
1395
}
1790
tempdir_created = true;
1791
1396
1792
1397
if(quit_now){
1793
1398
goto end;
1795
1400
1796
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1797
1402
fprintf(stderr, "init_gpgme failed\n");
1798
exitcode = EX_UNAVAILABLE;
1403
exitcode = EXIT_FAILURE;
1799
1404
goto end;
1800
1405
} else {
1801
1406
gpgme_initialized = true;
1811
1416
char *address = strrchr(connect_to, ':');
1812
1417
if(address == NULL){
1813
1418
fprintf(stderr, "No colon in address\n");
1814
exitcode = EX_USAGE;
1419
exitcode = EXIT_FAILURE;
1815
1420
goto end;
1816
1421
}
1817
1422
1825
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1826
1431
or tmpmax != (uint16_t)tmpmax){
1827
1432
fprintf(stderr, "Bad port number\n");
1828
exitcode = EX_USAGE;
1433
exitcode = EXIT_FAILURE;
1829
1434
goto end;
1830
1435
}
1831
1436
1835
1440
1836
1441
port = (uint16_t)tmpmax;
1837
1442
*address = '\0';
1443
address = connect_to;
1838
1444
/* Colon in address indicates IPv6 */
1839
1445
int af;
1840
if(strchr(connect_to, ':') != NULL){
1446
if(strchr(address, ':') != NULL){
1841
1447
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
}
1848
1448
} else {
1849
1449
af = AF_INET;
1850
1450
}
1851
address = connect_to;
1852
1451
1853
1452
if(quit_now){
1854
1453
goto end;
1855
1454
}
1856
1455
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){
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
1870
1460
exitcode = EXIT_SUCCESS;
1871
1461
}
1872
1873
1462
goto end;
1874
1463
}
1875
1464
1899
1488
if(mc.server == NULL){
1900
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1901
1490
avahi_strerror(error));
1902
exitcode = EX_UNAVAILABLE;
1491
exitcode = EXIT_FAILURE;
1903
1492
goto end;
1904
1493
}
1905
1494
1914
1503
if(sb == NULL){
1915
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1916
1505
avahi_strerror(avahi_server_errno(mc.server)));
1917
exitcode = EX_UNAVAILABLE;
1506
exitcode = EXIT_FAILURE;
1918
1507
goto end;
1919
1508
}
1920
1509
1927
1516
if(debug){
1928
1517
fprintf(stderr, "Starting Avahi loop search\n");
1929
1518
}
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
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
1937
1521
1938
1522
end:
1939
1523
1960
1544
if(gpgme_initialized){
1961
1545
gpgme_release(mc.ctx);
1962
1546
}
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
}
1974
1547
1975
1548
/* Take down the network interface */
1976
1549
if(take_down_interface){
1978
1551
errno = 0;
1979
1552
ret = seteuid(0);
1980
1553
if(ret == -1){
1981
perror_plus("seteuid");
1554
perror("seteuid");
1982
1555
}
1983
1556
if(geteuid() == 0){
1984
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1985
1558
if(ret == -1){
1986
perror_plus("ioctl SIOCGIFFLAGS");
1559
perror("ioctl SIOCGIFFLAGS");
1987
1560
} else if(network.ifr_flags & IFF_UP) {
1988
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1990
1563
if(ret == -1){
1991
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1564
perror("ioctl SIOCSIFFLAGS");
1992
1565
}
1993
1566
}
1994
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1995
1568
if(ret == -1){
1996
perror_plus("close");
1569
perror("close");
1997
1570
}
1998
1571
/* Lower privileges permanently */
1999
1572
errno = 0;
2000
1573
ret = setuid(uid);
2001
1574
if(ret == -1){
2002
perror_plus("setuid");
1575
perror("setuid");
2003
1576
}
2004
1577
}
2005
1578
}
2006
1579
2007
/* Removes the GPGME temp directory and all files inside */
1580
/* Removes the temp directory used by GPGME */
2008
1581
if(tempdir_created){
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];
1582
DIR *d;
1583
struct dirent *direntry;
1584
d = opendir(tempdir);
1585
if(d == NULL){
1586
if(errno != ENOENT){
1587
perror("opendir");
1588
}
1589
} else {
1590
while(true){
1591
direntry = readdir(d);
1592
if(direntry == NULL){
1593
break;
1594
}
1595
/* Skip "." and ".." */
1596
if(direntry->d_name[0] == '.'
1597
and (direntry->d_name[1] == '\0'
1598
or (direntry->d_name[1] == '.'
1599
and direntry->d_name[2] == '\0'))){
1600
continue;
1601
}
2016
1602
char *fullname = NULL;
2017
1603
ret = asprintf(&fullname, "%s/%s", tempdir,
2018
1604
direntry->d_name);
2019
1605
if(ret < 0){
2020
perror_plus("asprintf");
1606
perror("asprintf");
2021
1607
continue;
2022
1608
}
2023
1609
ret = remove(fullname);
2027
1613
}
2028
1614
free(fullname);
2029
1615
}
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");
1616
closedir(d);
2036
1617
}
2037
1618
ret = rmdir(tempdir);
2038
1619
if(ret == -1 and errno != ENOENT){
2039
perror_plus("rmdir");
1620
perror("rmdir");
2040
1621
}
2041
1622
}
2042
1623
2047
1628
&old_sigterm_action,
2048
1629
NULL));
2049
1630
if(ret == -1){
2050
perror_plus("sigaction");
1631
perror("sigaction");
2051
1632
}
2052
1633
do {
2053
1634
ret = raise(signal_received);
2054
1635
} while(ret != 0 and errno == EINTR);
2055
1636
if(ret != 0){
2056
perror_plus("raise");
1637
perror("raise");
2057
1638
abort();
2058
1639
}
2059
1640
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0