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 772
- compare with another revision
- download diff
- download tarball
- view history from revision 772
- Committer: Teddy Hogeborn
- Date: 2015-07-16 20:30:35 UTC
- Revision ID: teddy@recompile.se-20150716203035-z7qjwm270o2vrjah
Assume the C11 language (ISO 9899:2011), when compiling C code.
* Makefile (LANGUAGE): Changed to "-std=gnu11".
* Makefile (LANGUAGE): Changed to "-std=gnu11".
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
14
*
15
* This file is part of Mandos.
16
*
17
* Mandos is free software: you can redistribute it and/or modify it
18
* under the terms of the GNU General Public License as published by
19
* the Free Software Foundation, either version 3 of the License, or
20
* (at your option) any later version.
21
*
22
* Mandos is distributed in the hope that it will be useful, but
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
14
*
15
* This program is free software: you can redistribute it and/or
16
* modify it under the terms of the GNU General Public License as
17
* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
19
*
20
* This program is distributed in the hope that it will be useful, but
23
21
* WITHOUT ANY WARRANTY; without even the implied warranty of
24
22
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25
23
* General Public License for more details.
26
24
*
27
25
* You should have received a copy of the GNU General Public License
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
29
28
*
30
29
* Contact the authors at <mandos@recompile.se>.
31
30
*/
47
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
47
strtof(), abort() */
49
48
#include <stdbool.h> /* bool, false, true */
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
53
51
#include <sys/ioctl.h> /* ioctl */
54
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
55
53
sockaddr_in6, PF_INET6,
59
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
60
58
inet_pton(), connect(),
61
59
getnameinfo() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
63
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
64
62
*/
65
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
66
64
strtoimax() */
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
72
66
program_invocation_short_name */
73
67
#include <time.h> /* nanosleep(), time(), sleep() */
74
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
311
305
return false;
312
306
}
313
307
314
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
315
309
if(ret == -1){
316
310
perror_plus("close");
317
311
}
519
513
fprintf_plus(stderr, "GnuTLS: %s", string);
520
514
}
521
515
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
523
517
static int init_gnutls_global(const char *pubkeyfilename,
524
518
const char *seckeyfilename,
525
519
const char *dhparamsfilename,
531
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
532
526
}
533
527
528
ret = gnutls_global_init();
529
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
531
safer_gnutls_strerror(ret));
532
return -1;
533
}
534
534
535
if(debug){
535
536
/* "Use a log level over 10 to enable all debugging options."
536
537
* - GnuTLS manual
544
545
if(ret != GNUTLS_E_SUCCESS){
545
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
547
safer_gnutls_strerror(ret));
548
gnutls_global_deinit();
547
549
return -1;
548
550
}
549
551
627
629
safer_gnutls_strerror(ret));
628
630
dhparamsfilename = NULL;
629
631
}
630
free(params.data);
631
632
} while(false);
632
633
}
633
634
if(dhparamsfilename == NULL){
754
755
globalfail:
755
756
756
757
gnutls_certificate_free_credentials(mc->cred);
758
gnutls_global_deinit();
757
759
gnutls_dh_params_deinit(mc->dh_params);
758
760
return -1;
759
761
}
820
822
821
823
/* Set effective uid to 0, return errno */
822
824
__attribute__((warn_unused_result))
823
int raise_privileges(void){
824
int old_errno = errno;
825
int ret = 0;
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
826
828
if(seteuid(0) == -1){
827
ret = errno;
829
ret_errno = errno;
828
830
}
829
831
errno = old_errno;
830
return ret;
832
return ret_errno;
831
833
}
832
834
833
835
/* Set effective and real user ID to 0. Return errno. */
834
836
__attribute__((warn_unused_result))
835
int raise_privileges_permanently(void){
836
int old_errno = errno;
837
int ret = raise_privileges();
838
if(ret != 0){
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
840
if(ret_errno != 0){
839
841
errno = old_errno;
840
return ret;
842
return ret_errno;
841
843
}
842
844
if(setuid(0) == -1){
843
ret = errno;
845
ret_errno = errno;
844
846
}
845
847
errno = old_errno;
846
return ret;
848
return ret_errno;
847
849
}
848
850
849
851
/* Set effective user ID to unprivileged saved user ID */
850
852
__attribute__((warn_unused_result))
851
int lower_privileges(void){
852
int old_errno = errno;
853
int ret = 0;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
854
856
if(seteuid(uid) == -1){
855
ret = errno;
857
ret_errno = errno;
856
858
}
857
859
errno = old_errno;
858
return ret;
860
return ret_errno;
859
861
}
860
862
861
863
/* Lower privileges permanently */
862
864
__attribute__((warn_unused_result))
863
int lower_privileges_permanently(void){
864
int old_errno = errno;
865
int ret = 0;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
866
868
if(setuid(uid) == -1){
867
ret = errno;
869
ret_errno = errno;
868
870
}
869
871
errno = old_errno;
870
return ret;
872
return ret_errno;
871
873
}
872
874
873
875
/* Helper function to add_local_route() and delete_local_route() */
929
931
perror_plus("dup2(devnull, STDIN_FILENO)");
930
932
_exit(EX_OSERR);
931
933
}
932
ret = close(devnull);
934
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
933
935
if(ret == -1){
934
936
perror_plus("close");
935
937
_exit(EX_OSERR);
952
954
helper, O_RDONLY));
953
955
if(helper_fd == -1){
954
956
perror_plus("openat");
955
close(helperdir_fd);
956
957
_exit(EX_UNAVAILABLE);
957
958
}
958
close(helperdir_fd);
959
TEMP_FAILURE_RETRY(close(helperdir_fd));
959
960
#ifdef __GNUC__
960
961
#pragma GCC diagnostic push
961
962
#pragma GCC diagnostic ignored "-Wcast-qual"
1080
1081
bool match = false;
1081
1082
{
1082
1083
char *interface = NULL;
1083
while((interface = argz_next(mc->interfaces,
1084
mc->interfaces_size,
1085
interface))){
1084
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1085
interface))){
1086
1086
if(if_nametoindex(interface) == (unsigned int)if_index){
1087
1087
match = true;
1088
1088
break;
1130
1130
goto mandos_end;
1131
1131
}
1132
1132
1133
memset(&to, 0, sizeof(to));
1133
1134
if(af == AF_INET6){
1134
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1135
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to6->sin6_addr);
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1137
1137
} else { /* IPv4 */
1138
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1139
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1140
ret = inet_pton(af, ip, &to4->sin_addr);
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1141
1140
}
1142
1141
if(ret < 0 ){
1143
1142
int e = errno;
1222
1221
sizeof(struct sockaddr_in));
1223
1222
}
1224
1223
if(ret < 0){
1225
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1224
if(errno == ENETUNREACH
1226
1225
and if_index != AVAHI_IF_UNSPEC
1227
1226
and connect_to == NULL
1228
1227
and not route_added and
1241
1240
with an explicit route added with the server's address.
1242
1241
1243
1242
Avahi bug reference:
1244
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1243
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1245
1244
https://bugs.debian.org/587961
1246
1245
*/
1247
1246
if(debug){
1427
1426
&decrypted_buffer, mc);
1428
1427
if(decrypted_buffer_size >= 0){
1429
1428
1430
clearerr(stdout);
1431
1429
written = 0;
1432
1430
while(written < (size_t) decrypted_buffer_size){
1433
1431
if(quit_now){
1449
1447
}
1450
1448
written += (size_t)ret;
1451
1449
}
1452
ret = fflush(stdout);
1453
if(ret != 0){
1454
int e = errno;
1455
if(debug){
1456
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1457
strerror(errno));
1458
}
1459
errno = e;
1460
goto mandos_end;
1461
}
1462
1450
retval = 0;
1463
1451
}
1464
1452
}
1477
1465
free(decrypted_buffer);
1478
1466
free(buffer);
1479
1467
if(tcp_sd >= 0){
1480
ret = close(tcp_sd);
1468
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1481
1469
}
1482
1470
if(ret == -1){
1483
1471
if(e == 0){
1495
1483
return retval;
1496
1484
}
1497
1485
1486
__attribute__((nonnull))
1498
1487
static void resolve_callback(AvahiSServiceResolver *r,
1499
1488
AvahiIfIndex interface,
1500
1489
AvahiProtocol proto,
1637
1626
__attribute__((nonnull, warn_unused_result))
1638
1627
bool get_flags(const char *ifname, struct ifreq *ifr){
1639
1628
int ret;
1640
int old_errno;
1629
error_t ret_errno;
1641
1630
1642
1631
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
1632
if(s < 0){
1644
old_errno = errno;
1633
ret_errno = errno;
1645
1634
perror_plus("socket");
1646
errno = old_errno;
1635
errno = ret_errno;
1647
1636
return false;
1648
1637
}
1649
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1650
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1638
strcpy(ifr->ifr_name, ifname);
1651
1639
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1652
1640
if(ret == -1){
1653
1641
if(debug){
1654
old_errno = errno;
1642
ret_errno = errno;
1655
1643
perror_plus("ioctl SIOCGIFFLAGS");
1656
errno = old_errno;
1644
errno = ret_errno;
1657
1645
}
1658
1646
return false;
1659
1647
}
1923
1911
return;
1924
1912
}
1925
1913
}
1926
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
if(devnull == -1){
1928
perror_plus("open(\"/dev/null\", O_RDONLY)");
1929
return;
1930
}
1914
#ifdef __GLIBC__
1915
#if __GLIBC_PREREQ(2, 15)
1931
1916
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1932
1917
runnable_hook, alphasort);
1918
#else /* not __GLIBC_PREREQ(2, 15) */
1919
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1920
alphasort);
1921
#endif /* not __GLIBC_PREREQ(2, 15) */
1922
#else /* not __GLIBC__ */
1923
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1924
alphasort);
1925
#endif /* not __GLIBC__ */
1933
1926
if(numhooks == -1){
1934
1927
perror_plus("scandir");
1935
close(devnull);
1936
1928
return;
1937
1929
}
1938
1930
struct dirent *direntry;
1939
1931
int ret;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1933
if(devnull == -1){
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1935
return;
1936
}
1940
1937
for(int i = 0; i < numhooks; i++){
1941
1938
direntry = direntries[i];
1942
1939
if(debug){
2013
2010
perror_plus("openat");
2014
2011
_exit(EXIT_FAILURE);
2015
2012
}
2016
if(close(hookdir_fd) == -1){
2013
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2017
2014
perror_plus("close");
2018
2015
_exit(EXIT_FAILURE);
2019
2016
}
2022
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2023
2020
_exit(EX_OSERR);
2024
2021
}
2025
ret = close(devnull);
2022
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2026
2023
if(ret == -1){
2027
2024
perror_plus("close");
2028
2025
_exit(EX_OSERR);
2077
2074
free(direntry);
2078
2075
}
2079
2076
free(direntries);
2080
if(close(hookdir_fd) == -1){
2077
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2081
2078
perror_plus("close");
2082
2079
} else {
2083
2080
hookdir_fd = -1;
2086
2083
}
2087
2084
2088
2085
__attribute__((nonnull, warn_unused_result))
2089
int bring_up_interface(const char *const interface,
2090
const float delay){
2091
int old_errno = errno;
2086
error_t bring_up_interface(const char *const interface,
2087
const float delay){
2088
error_t old_errno = errno;
2092
2089
int ret;
2093
2090
struct ifreq network;
2094
2091
unsigned int if_index = if_nametoindex(interface);
2104
2101
}
2105
2102
2106
2103
if(not interface_is_up(interface)){
2107
int ret_errno = 0;
2108
int ioctl_errno = 0;
2104
error_t ret_errno = 0, ioctl_errno = 0;
2109
2105
if(not get_flags(interface, &network)){
2110
2106
ret_errno = errno;
2111
2107
fprintf_plus(stderr, "Failed to get flags for interface "
2124
2120
}
2125
2121
2126
2122
if(quit_now){
2127
ret = close(sd);
2123
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2128
2124
if(ret == -1){
2129
2125
perror_plus("close");
2130
2126
}
2180
2176
}
2181
2177
2182
2178
/* Close the socket */
2183
ret = close(sd);
2179
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2184
2180
if(ret == -1){
2185
2181
perror_plus("close");
2186
2182
}
2198
2194
2199
2195
/* Sleep checking until interface is running.
2200
2196
Check every 0.25s, up to total time of delay */
2201
for(int i = 0; i < delay * 4; i++){
2197
for(int i=0; i < delay * 4; i++){
2202
2198
if(interface_is_running(interface)){
2203
2199
break;
2204
2200
}
2214
2210
}
2215
2211
2216
2212
__attribute__((nonnull, warn_unused_result))
2217
int take_down_interface(const char *const interface){
2218
int old_errno = errno;
2213
error_t take_down_interface(const char *const interface){
2214
error_t old_errno = errno;
2219
2215
struct ifreq network;
2220
2216
unsigned int if_index = if_nametoindex(interface);
2221
2217
if(if_index == 0){
2224
2220
return ENXIO;
2225
2221
}
2226
2222
if(interface_is_up(interface)){
2227
int ret_errno = 0;
2228
int ioctl_errno = 0;
2223
error_t ret_errno = 0, ioctl_errno = 0;
2229
2224
if(not get_flags(interface, &network) and debug){
2230
2225
ret_errno = errno;
2231
2226
fprintf_plus(stderr, "Failed to get flags for interface "
2269
2264
}
2270
2265
2271
2266
/* Close the socket */
2272
int ret = close(sd);
2267
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2273
2268
if(ret == -1){
2274
2269
perror_plus("close");
2275
2270
}
2291
2286
2292
2287
int main(int argc, char *argv[]){
2293
2288
mandos_context mc = { .server = NULL, .dh_bits = 0,
2294
.priority = "SECURE256:!CTYPE-X.509"
2295
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2296
.current_server = NULL, .interfaces = NULL,
2297
.interfaces_size = 0 };
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2298
2292
AvahiSServiceBrowser *sb = NULL;
2299
2293
error_t ret_errno;
2300
2294
int ret;
2481
2475
.args_doc = "",
2482
2476
.doc = "Mandos client -- Get and decrypt"
2483
2477
" passwords from a Mandos server" };
2484
ret_errno = argp_parse(&argp, argc, argv,
2485
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2486
switch(ret_errno){
2478
ret = argp_parse(&argp, argc, argv,
2479
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
switch(ret){
2487
2481
case 0:
2488
2482
break;
2489
2483
case ENOMEM:
2490
2484
default:
2491
errno = ret_errno;
2485
errno = ret;
2492
2486
perror_plus("argp_parse");
2493
2487
exitcode = EX_OSERR;
2494
2488
goto end;
2500
2494
2501
2495
{
2502
2496
/* Work around Debian bug #633582:
2503
<https://bugs.debian.org/633582> */
2497
<http://bugs.debian.org/633582> */
2504
2498
2505
2499
/* Re-raise privileges */
2506
ret = raise_privileges();
2507
if(ret != 0){
2508
errno = ret;
2500
ret_errno = raise_privileges();
2501
if(ret_errno != 0){
2502
errno = ret_errno;
2509
2503
perror_plus("Failed to raise privileges");
2510
2504
} else {
2511
2505
struct stat st;
2527
2521
}
2528
2522
}
2529
2523
}
2530
close(seckey_fd);
2524
TEMP_FAILURE_RETRY(close(seckey_fd));
2531
2525
}
2532
2526
}
2533
2527
2548
2542
}
2549
2543
}
2550
2544
}
2551
close(pubkey_fd);
2545
TEMP_FAILURE_RETRY(close(pubkey_fd));
2552
2546
}
2553
2547
}
2554
2548
2555
if(dh_params_file != NULL
2556
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2549
if(strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2557
2550
int dhparams_fd = open(dh_params_file, O_RDONLY);
2558
2551
if(dhparams_fd == -1){
2559
2552
perror_plus("open");
2570
2563
}
2571
2564
}
2572
2565
}
2573
close(dhparams_fd);
2566
TEMP_FAILURE_RETRY(close(dhparams_fd));
2574
2567
}
2575
2568
}
2576
2569
2577
2570
/* Lower privileges */
2578
ret = lower_privileges();
2579
if(ret != 0){
2580
errno = ret;
2571
ret_errno = lower_privileges();
2572
if(ret_errno != 0){
2573
errno = ret_errno;
2581
2574
perror_plus("Failed to lower privileges");
2582
2575
}
2583
2576
}
2911
2904
2912
2905
/* Allocate a new server */
2913
2906
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2914
&config, NULL, NULL, &ret);
2907
&config, NULL, NULL, &ret_errno);
2915
2908
2916
2909
/* Free the Avahi configuration data */
2917
2910
avahi_server_config_free(&config);
2920
2913
/* Check if creating the Avahi server object succeeded */
2921
2914
if(mc.server == NULL){
2922
2915
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2923
avahi_strerror(ret));
2916
avahi_strerror(ret_errno));
2924
2917
exitcode = EX_UNAVAILABLE;
2925
2918
goto end;
2926
2919
}
2961
2954
end:
2962
2955
2963
2956
if(debug){
2964
if(signal_received){
2965
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2966
argv[0], signal_received,
2967
strsignal(signal_received));
2968
} else {
2969
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
}
2957
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2971
2958
}
2972
2959
2973
2960
/* Cleanup things */
2984
2971
2985
2972
if(gnutls_initialized){
2986
2973
gnutls_certificate_free_credentials(mc.cred);
2974
gnutls_global_deinit();
2987
2975
gnutls_dh_params_deinit(mc.dh_params);
2988
2976
}
2989
2977
3012
3000
3013
3001
/* Re-raise privileges */
3014
3002
{
3015
ret = raise_privileges();
3016
if(ret != 0){
3017
errno = ret;
3003
ret_errno = raise_privileges();
3004
if(ret_errno != 0){
3005
errno = ret_errno;
3018
3006
perror_plus("Failed to raise privileges");
3019
3007
} else {
3020
3008
3025
3013
/* Take down the network interfaces which were brought up */
3026
3014
{
3027
3015
char *interface = NULL;
3028
while((interface = argz_next(interfaces_to_take_down,
3029
interfaces_to_take_down_size,
3030
interface))){
3031
ret = take_down_interface(interface);
3032
if(ret != 0){
3033
errno = ret;
3016
while((interface=argz_next(interfaces_to_take_down,
3017
interfaces_to_take_down_size,
3018
interface))){
3019
ret_errno = take_down_interface(interface);
3020
if(ret_errno != 0){
3021
errno = ret_errno;
3034
3022
perror_plus("Failed to take down interface");
3035
3023
}
3036
3024
}
3041
3029
}
3042
3030
}
3043
3031
3044
ret = lower_privileges_permanently();
3045
if(ret != 0){
3046
errno = ret;
3032
ret_errno = lower_privileges_permanently();
3033
if(ret_errno != 0){
3034
errno = ret_errno;
3047
3035
perror_plus("Failed to lower privileges permanently");
3048
3036
}
3049
3037
}
3051
3039
free(interfaces_to_take_down);
3052
3040
free(interfaces_hooks);
3053
3041
3054
void clean_dir_at(int base, const char * const dirname,
3055
uintmax_t level){
3056
struct dirent **direntries = NULL;
3057
int dret;
3058
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3059
O_RDONLY
3060
| O_NOFOLLOW
3061
| O_DIRECTORY
3062
| O_PATH));
3063
if(dir_fd == -1){
3064
perror_plus("open");
3065
return;
3066
}
3067
int numentries = scandirat(dir_fd, ".", &direntries,
3068
notdotentries, alphasort);
3069
if(numentries >= 0){
3070
for(int i = 0; i < numentries; i++){
3071
if(debug){
3072
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3073
dirname, direntries[i]->d_name);
3074
}
3075
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3076
if(dret == -1){
3077
if(errno == EISDIR){
3078
dret = unlinkat(dir_fd, direntries[i]->d_name,
3079
AT_REMOVEDIR);
3080
}
3081
if((dret == -1) and (errno == ENOTEMPTY)
3082
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3083
== 0) and (level == 0)){
3084
/* Recurse only in this special case */
3085
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3086
dret = 0;
3087
}
3088
if((dret == -1) and (errno != ENOENT)){
3089
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3090
direntries[i]->d_name, strerror(errno));
3091
}
3092
}
3093
free(direntries[i]);
3094
}
3095
3096
/* need to clean even if 0 because man page doesn't specify */
3097
free(direntries);
3098
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
if(dret == -1 and errno != ENOENT){
3100
perror_plus("rmdir");
3101
}
3102
} else {
3103
perror_plus("scandirat");
3104
}
3105
close(dir_fd);
3106
}
3107
3108
3042
/* Removes the GPGME temp directory and all files inside */
3109
3043
if(tempdir != NULL){
3110
clean_dir_at(-1, tempdir, 0);
3044
struct dirent **direntries = NULL;
3045
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3046
| O_NOFOLLOW
3047
| O_DIRECTORY
3048
| O_PATH));
3049
if(tempdir_fd == -1){
3050
perror_plus("open");
3051
} else {
3052
#ifdef __GLIBC__
3053
#if __GLIBC_PREREQ(2, 15)
3054
int numentries = scandirat(tempdir_fd, ".", &direntries,
3055
notdotentries, alphasort);
3056
#else /* not __GLIBC_PREREQ(2, 15) */
3057
int numentries = scandir(tempdir, &direntries, notdotentries,
3058
alphasort);
3059
#endif /* not __GLIBC_PREREQ(2, 15) */
3060
#else /* not __GLIBC__ */
3061
int numentries = scandir(tempdir, &direntries, notdotentries,
3062
alphasort);
3063
#endif /* not __GLIBC__ */
3064
if(numentries >= 0){
3065
for(int i = 0; i < numentries; i++){
3066
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3067
if(ret == -1){
3068
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3069
" \"%s\", 0): %s\n", tempdir,
3070
direntries[i]->d_name, strerror(errno));
3071
}
3072
free(direntries[i]);
3073
}
3074
3075
/* need to clean even if 0 because man page doesn't specify */
3076
free(direntries);
3077
if(numentries == -1){
3078
perror_plus("scandir");
3079
}
3080
ret = rmdir(tempdir);
3081
if(ret == -1 and errno != ENOENT){
3082
perror_plus("rmdir");
3083
}
3084
}
3085
TEMP_FAILURE_RETRY(close(tempdir_fd));
3086
}
3111
3087
}
3112
3088
3113
3089
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0