32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
33
34
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
43
stdout, ferror(), remove() */
41
44
#include <stdint.h> /* uint16_t, uint32_t */
42
45
#include <stddef.h> /* NULL, size_t, ssize_t */
43
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
45
#include <stdbool.h> /* bool, true */
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
49
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
53
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
54
SOCK_STREAM, uid_t, gid_t, open(),
54
56
#include <sys/stat.h> /* open() */
55
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
58
inet_pton(), connect() */
58
59
#include <fcntl.h> /* open() */
59
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
62
64
#include <assert.h> /* assert() */
63
65
#include <errno.h> /* perror(), errno */
64
66
#include <time.h> /* nanosleep(), time() */
65
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
68
SIOCSIFFLAGS, if_indextoname(),
67
69
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
69
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
74
getuid(), getgid(), setuid(),
72
76
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
77
#include <iso646.h> /* not, or, and */
74
78
#include <argp.h> /* struct argp_option, error_t, struct
75
79
argp_state, struct argp,
76
80
argp_parse(), ARGP_KEY_ARG,
77
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
78
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
81
91
/* All Avahi types, constants and functions
959
/* stop main loop after sigterm has been called */
960
static void handle_sigterm(int sig){
965
signal_received = sig;
966
int old_errno = errno;
967
if(mc.simple_poll != NULL){
968
avahi_simple_poll_quit(mc.simple_poll);
822
973
int main(int argc, char *argv[]){
823
AvahiSServiceBrowser *sb = NULL;
828
int exitcode = EXIT_SUCCESS;
829
const char *interface = "eth0";
830
struct ifreq network;
834
char *connect_to = NULL;
835
char tempdir[] = "/tmp/mandosXXXXXX";
836
bool tempdir_created = false;
837
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
838
const char *seckey = PATHDIR "/" SECKEY;
839
const char *pubkey = PATHDIR "/" PUBKEY;
841
mandos_context mc = { .simple_poll = NULL, .server = NULL,
842
.dh_bits = 1024, .priority = "SECURE256"
843
":!CTYPE-X.509:+CTYPE-OPENPGP" };
844
bool gnutls_initialized = false;
845
bool gpgme_initialized = false;
849
struct argp_option options[] = {
850
{ .name = "debug", .key = 128,
851
.doc = "Debug mode", .group = 3 },
852
{ .name = "connect", .key = 'c',
853
.arg = "ADDRESS:PORT",
854
.doc = "Connect directly to a specific Mandos server",
856
{ .name = "interface", .key = 'i',
858
.doc = "Interface that will be used to search for Mandos"
861
{ .name = "seckey", .key = 's',
863
.doc = "OpenPGP secret key file base name",
865
{ .name = "pubkey", .key = 'p',
867
.doc = "OpenPGP public key file base name",
869
{ .name = "dh-bits", .key = 129,
871
.doc = "Bit length of the prime number used in the"
872
" Diffie-Hellman key exchange",
874
{ .name = "priority", .key = 130,
876
.doc = "GnuTLS priority string for the TLS handshake",
878
{ .name = "delay", .key = 131,
880
.doc = "Maximum delay to wait for interface startup",
885
error_t parse_opt(int key, char *arg,
886
struct argp_state *state) {
888
case 128: /* --debug */
891
case 'c': /* --connect */
894
case 'i': /* --interface */
897
case 's': /* --seckey */
900
case 'p': /* --pubkey */
903
case 129: /* --dh-bits */
904
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
905
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
906
or arg[numchars] != '\0'){
907
fprintf(stderr, "Bad number of DH bits\n");
910
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
912
case 130: /* --priority */
915
case 131: /* --delay */
916
ret = sscanf(arg, "%lf%n", &delay, &numchars);
917
if(ret < 1 or arg[numchars] != '\0'){
918
fprintf(stderr, "Bad delay\n");
927
return ARGP_ERR_UNKNOWN;
932
struct argp argp = { .options = options, .parser = parse_opt,
934
.doc = "Mandos client -- Get and decrypt"
935
" passwords from a Mandos server" };
936
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
937
if(ret == ARGP_ERR_UNKNOWN){
938
fprintf(stderr, "Unknown error while parsing arguments\n");
939
exitcode = EXIT_FAILURE;
944
/* If the interface is down, bring it up */
946
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
947
messages to mess up the prompt */
948
ret = klogctl(8, NULL, 5);
974
AvahiSServiceBrowser *sb = NULL;
979
int exitcode = EXIT_SUCCESS;
980
const char *interface = "eth0";
981
struct ifreq network;
983
bool take_down_interface = false;
986
char *connect_to = NULL;
987
char tempdir[] = "/tmp/mandosXXXXXX";
988
bool tempdir_created = false;
989
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
990
const char *seckey = PATHDIR "/" SECKEY;
991
const char *pubkey = PATHDIR "/" PUBKEY;
993
bool gnutls_initialized = false;
994
bool gpgme_initialized = false;
997
struct sigaction old_sigterm_action;
998
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1001
struct argp_option options[] = {
1002
{ .name = "debug", .key = 128,
1003
.doc = "Debug mode", .group = 3 },
1004
{ .name = "connect", .key = 'c',
1005
.arg = "ADDRESS:PORT",
1006
.doc = "Connect directly to a specific Mandos server",
1008
{ .name = "interface", .key = 'i',
1010
.doc = "Network interface that will be used to search for"
1013
{ .name = "seckey", .key = 's',
1015
.doc = "OpenPGP secret key file base name",
1017
{ .name = "pubkey", .key = 'p',
1019
.doc = "OpenPGP public key file base name",
1021
{ .name = "dh-bits", .key = 129,
1023
.doc = "Bit length of the prime number used in the"
1024
" Diffie-Hellman key exchange",
1026
{ .name = "priority", .key = 130,
1028
.doc = "GnuTLS priority string for the TLS handshake",
1030
{ .name = "delay", .key = 131,
1032
.doc = "Maximum delay to wait for interface startup",
1037
error_t parse_opt(int key, char *arg,
1038
struct argp_state *state){
1040
case 128: /* --debug */
1043
case 'c': /* --connect */
1046
case 'i': /* --interface */
1049
case 's': /* --seckey */
1052
case 'p': /* --pubkey */
1055
case 129: /* --dh-bits */
1057
tmpmax = strtoimax(arg, &tmp, 10);
1058
if(errno != 0 or tmp == arg or *tmp != '\0'
1059
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1060
fprintf(stderr, "Bad number of DH bits\n");
1063
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1065
case 130: /* --priority */
1068
case 131: /* --delay */
1070
delay = strtof(arg, &tmp);
1071
if(errno != 0 or tmp == arg or *tmp != '\0'){
1072
fprintf(stderr, "Bad delay\n");
1081
return ARGP_ERR_UNKNOWN;
1086
struct argp argp = { .options = options, .parser = parse_opt,
1088
.doc = "Mandos client -- Get and decrypt"
1089
" passwords from a Mandos server" };
1090
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1091
if(ret == ARGP_ERR_UNKNOWN){
1092
fprintf(stderr, "Unknown error while parsing arguments\n");
1093
exitcode = EXIT_FAILURE;
1099
avahi_set_log_function(empty_log);
1102
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1103
from the signal handler */
1104
/* Initialize the pseudo-RNG for Avahi */
1105
srand((unsigned int) time(NULL));
1106
mc.simple_poll = avahi_simple_poll_new();
1107
if(mc.simple_poll == NULL){
1108
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1109
exitcode = EXIT_FAILURE;
1113
sigemptyset(&sigterm_action.sa_mask);
1114
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1116
perror("sigaddset");
1117
exitcode = EXIT_FAILURE;
1120
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1122
perror("sigaddset");
1123
exitcode = EXIT_FAILURE;
1126
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1128
perror("sigaddset");
1129
exitcode = EXIT_FAILURE;
1132
/* Need to check if the handler is SIG_IGN before handling:
1133
| [[info:libc:Initial Signal Actions]] |
1134
| [[info:libc:Basic Signal Handling]] |
1136
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1138
perror("sigaction");
1139
return EXIT_FAILURE;
1141
if(old_sigterm_action.sa_handler != SIG_IGN){
1142
ret = sigaction(SIGINT, &sigterm_action, NULL);
1144
perror("sigaction");
1145
exitcode = EXIT_FAILURE;
1149
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1151
perror("sigaction");
1152
return EXIT_FAILURE;
1154
if(old_sigterm_action.sa_handler != SIG_IGN){
1155
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1157
perror("sigaction");
1158
exitcode = EXIT_FAILURE;
1162
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1164
perror("sigaction");
1165
return EXIT_FAILURE;
1167
if(old_sigterm_action.sa_handler != SIG_IGN){
1168
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1170
perror("sigaction");
1171
exitcode = EXIT_FAILURE;
1176
/* If the interface is down, bring it up */
1177
if(interface[0] != '\0'){
1178
if_index = (AvahiIfIndex) if_nametoindex(interface);
1180
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1181
exitcode = EXIT_FAILURE;
1190
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1191
messages to mess up the prompt */
1192
ret = klogctl(8, NULL, 5);
1193
bool restore_loglevel = true;
1195
restore_loglevel = false;
1198
#endif /* __linux__ */
1200
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1203
exitcode = EXIT_FAILURE;
1205
if(restore_loglevel){
1206
ret = klogctl(7, NULL, 0);
1211
#endif /* __linux__ */
1214
strcpy(network.ifr_name, interface);
1215
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1217
perror("ioctl SIOCGIFFLAGS");
1219
if(restore_loglevel){
1220
ret = klogctl(7, NULL, 0);
1225
#endif /* __linux__ */
1226
exitcode = EXIT_FAILURE;
1229
if((network.ifr_flags & IFF_UP) == 0){
1230
network.ifr_flags |= IFF_UP;
1231
take_down_interface = true;
1232
ret = ioctl(sd, SIOCSIFFLAGS, &network);
953
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1234
take_down_interface = false;
1235
perror("ioctl SIOCSIFFLAGS");
956
1236
exitcode = EXIT_FAILURE;
957
ret = klogctl(7, NULL, 0);
1238
if(restore_loglevel){
1239
ret = klogctl(7, NULL, 0);
1244
#endif /* __linux__ */
963
strcpy(network.ifr_name, interface);
1248
/* sleep checking until interface is running */
1249
for(int i=0; i < delay * 4; i++){
964
1250
ret = ioctl(sd, SIOCGIFFLAGS, &network);
966
1252
perror("ioctl SIOCGIFFLAGS");
967
ret = klogctl(7, NULL, 0);
971
exitcode = EXIT_FAILURE;
974
if((network.ifr_flags & IFF_UP) == 0){
975
network.ifr_flags |= IFF_UP;
976
ret = ioctl(sd, SIOCSIFFLAGS, &network);
978
perror("ioctl SIOCSIFFLAGS");
979
exitcode = EXIT_FAILURE;
980
ret = klogctl(7, NULL, 0);
987
/* sleep checking until interface is running */
988
for(int i=0; i < delay * 4; i++){
989
ret = ioctl(sd, SIOCGIFFLAGS, &network);
991
perror("ioctl SIOCGIFFLAGS");
992
} else if(network.ifr_flags & IFF_RUNNING){
995
struct timespec sleeptime = { .tv_nsec = 250000000 };
996
nanosleep(&sleeptime, NULL);
1253
} else if(network.ifr_flags & IFF_RUNNING){
1256
struct timespec sleeptime = { .tv_nsec = 250000000 };
1257
ret = nanosleep(&sleeptime, NULL);
1258
if(ret == -1 and errno != EINTR){
1259
perror("nanosleep");
1262
if(not take_down_interface){
1263
/* We won't need the socket anymore */
998
1264
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1000
1266
perror("close");
1270
if(restore_loglevel){
1002
1271
/* Restores kernel loglevel to default */
1003
1272
ret = klogctl(7, NULL, 0);
1005
1274
perror("klogctl");
1022
ret = init_gnutls_global(&mc, pubkey, seckey);
1024
fprintf(stderr, "init_gnutls_global failed\n");
1025
exitcode = EXIT_FAILURE;
1028
gnutls_initialized = true;
1031
if(mkdtemp(tempdir) == NULL){
1035
tempdir_created = true;
1037
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1038
fprintf(stderr, "init_gpgme failed\n");
1039
exitcode = EXIT_FAILURE;
1042
gpgme_initialized = true;
1045
if_index = (AvahiIfIndex) if_nametoindex(interface);
1047
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1048
exitcode = EXIT_FAILURE;
1052
if(connect_to != NULL){
1053
/* Connect directly, do not use Zeroconf */
1054
/* (Mainly meant for debugging) */
1055
char *address = strrchr(connect_to, ':');
1056
if(address == NULL){
1057
fprintf(stderr, "No colon in address\n");
1058
exitcode = EXIT_FAILURE;
1062
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1063
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1064
or address[numchars+1] != '\0'){
1065
fprintf(stderr, "Bad port number\n");
1066
exitcode = EXIT_FAILURE;
1069
port = (uint16_t)tmpmax;
1071
address = connect_to;
1072
ret = start_mandos_communication(address, port, if_index, &mc);
1074
exitcode = EXIT_FAILURE;
1076
exitcode = EXIT_SUCCESS;
1082
avahi_set_log_function(empty_log);
1085
/* Initialize the pseudo-RNG for Avahi */
1086
srand((unsigned int) time(NULL));
1088
/* Allocate main Avahi loop object */
1089
mc.simple_poll = avahi_simple_poll_new();
1090
if(mc.simple_poll == NULL) {
1091
fprintf(stderr, "Avahi: Failed to create simple poll"
1093
exitcode = EXIT_FAILURE;
1098
AvahiServerConfig config;
1099
/* Do not publish any local Zeroconf records */
1100
avahi_server_config_init(&config);
1101
config.publish_hinfo = 0;
1102
config.publish_addresses = 0;
1103
config.publish_workstation = 0;
1104
config.publish_domain = 0;
1106
/* Allocate a new server */
1107
mc.server = avahi_server_new(avahi_simple_poll_get
1108
(mc.simple_poll), &config, NULL,
1111
/* Free the Avahi configuration data */
1112
avahi_server_config_free(&config);
1115
/* Check if creating the Avahi server object succeeded */
1116
if(mc.server == NULL) {
1117
fprintf(stderr, "Failed to create Avahi server: %s\n",
1118
avahi_strerror(error));
1119
exitcode = EXIT_FAILURE;
1123
/* Create the Avahi service browser */
1124
sb = avahi_s_service_browser_new(mc.server, if_index,
1126
"_mandos._tcp", NULL, 0,
1127
browse_callback, &mc);
1129
fprintf(stderr, "Failed to create service browser: %s\n",
1130
avahi_strerror(avahi_server_errno(mc.server)));
1131
exitcode = EXIT_FAILURE;
1135
/* Run the main loop */
1138
fprintf(stderr, "Starting Avahi loop search\n");
1141
avahi_simple_poll_loop(mc.simple_poll);
1277
#endif /* __linux__ */
1302
ret = init_gnutls_global(pubkey, seckey);
1304
fprintf(stderr, "init_gnutls_global failed\n");
1305
exitcode = EXIT_FAILURE;
1308
gnutls_initialized = true;
1315
tempdir_created = true;
1316
if(mkdtemp(tempdir) == NULL){
1317
tempdir_created = false;
1326
if(not init_gpgme(pubkey, seckey, tempdir)){
1327
fprintf(stderr, "init_gpgme failed\n");
1328
exitcode = EXIT_FAILURE;
1331
gpgme_initialized = true;
1338
if(connect_to != NULL){
1339
/* Connect directly, do not use Zeroconf */
1340
/* (Mainly meant for debugging) */
1341
char *address = strrchr(connect_to, ':');
1342
if(address == NULL){
1343
fprintf(stderr, "No colon in address\n");
1344
exitcode = EXIT_FAILURE;
1354
tmpmax = strtoimax(address+1, &tmp, 10);
1355
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1356
or tmpmax != (uint16_t)tmpmax){
1357
fprintf(stderr, "Bad port number\n");
1358
exitcode = EXIT_FAILURE;
1366
port = (uint16_t)tmpmax;
1368
address = connect_to;
1369
/* Colon in address indicates IPv6 */
1371
if(strchr(address, ':') != NULL){
1381
ret = start_mandos_communication(address, port, if_index, af);
1383
exitcode = EXIT_FAILURE;
1385
exitcode = EXIT_SUCCESS;
1395
AvahiServerConfig config;
1396
/* Do not publish any local Zeroconf records */
1397
avahi_server_config_init(&config);
1398
config.publish_hinfo = 0;
1399
config.publish_addresses = 0;
1400
config.publish_workstation = 0;
1401
config.publish_domain = 0;
1403
/* Allocate a new server */
1404
mc.server = avahi_server_new(avahi_simple_poll_get
1405
(mc.simple_poll), &config, NULL,
1408
/* Free the Avahi configuration data */
1409
avahi_server_config_free(&config);
1412
/* Check if creating the Avahi server object succeeded */
1413
if(mc.server == NULL){
1414
fprintf(stderr, "Failed to create Avahi server: %s\n",
1415
avahi_strerror(error));
1416
exitcode = EXIT_FAILURE;
1424
/* Create the Avahi service browser */
1425
sb = avahi_s_service_browser_new(mc.server, if_index,
1426
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1427
NULL, 0, browse_callback, NULL);
1429
fprintf(stderr, "Failed to create service browser: %s\n",
1430
avahi_strerror(avahi_server_errno(mc.server)));
1431
exitcode = EXIT_FAILURE;
1439
/* Run the main loop */
1442
fprintf(stderr, "Starting Avahi loop search\n");
1445
avahi_simple_poll_loop(mc.simple_poll);
1146
fprintf(stderr, "%s exiting\n", argv[0]);
1149
/* Cleanup things */
1151
avahi_s_service_browser_free(sb);
1153
if(mc.server != NULL)
1154
avahi_server_free(mc.server);
1156
if(mc.simple_poll != NULL)
1157
avahi_simple_poll_free(mc.simple_poll);
1159
if(gnutls_initialized){
1160
gnutls_certificate_free_credentials(mc.cred);
1161
gnutls_global_deinit();
1162
gnutls_dh_params_deinit(mc.dh_params);
1165
if(gpgme_initialized){
1166
gpgme_release(mc.ctx);
1169
/* Removes the temp directory used by GPGME */
1170
if(tempdir_created){
1172
struct dirent *direntry;
1173
d = opendir(tempdir);
1175
if(errno != ENOENT){
1180
direntry = readdir(d);
1181
if(direntry == NULL){
1184
/* Skip "." and ".." */
1185
if(direntry->d_name[0] == '.'
1186
and (direntry->d_name[1] == '\0'
1187
or (direntry->d_name[1] == '.'
1188
and direntry->d_name[2] == '\0'))){
1191
char *fullname = NULL;
1192
ret = asprintf(&fullname, "%s/%s", tempdir,
1198
ret = remove(fullname);
1200
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1207
ret = rmdir(tempdir);
1208
if(ret == -1 and errno != ENOENT){
1450
fprintf(stderr, "%s exiting\n", argv[0]);
1453
/* Cleanup things */
1455
avahi_s_service_browser_free(sb);
1457
if(mc.server != NULL)
1458
avahi_server_free(mc.server);
1460
if(mc.simple_poll != NULL)
1461
avahi_simple_poll_free(mc.simple_poll);
1463
if(gnutls_initialized){
1464
gnutls_certificate_free_credentials(mc.cred);
1465
gnutls_global_deinit();
1466
gnutls_dh_params_deinit(mc.dh_params);
1469
if(gpgme_initialized){
1470
gpgme_release(mc.ctx);
1473
/* Take down the network interface */
1474
if(take_down_interface){
1475
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1477
perror("ioctl SIOCGIFFLAGS");
1478
} else if(network.ifr_flags & IFF_UP) {
1479
network.ifr_flags &= ~IFF_UP; /* clear flag */
1480
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1482
perror("ioctl SIOCSIFFLAGS");
1485
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1491
/* Removes the temp directory used by GPGME */
1492
if(tempdir_created){
1494
struct dirent *direntry;
1495
d = opendir(tempdir);
1497
if(errno != ENOENT){
1502
direntry = readdir(d);
1503
if(direntry == NULL){
1506
/* Skip "." and ".." */
1507
if(direntry->d_name[0] == '.'
1508
and (direntry->d_name[1] == '\0'
1509
or (direntry->d_name[1] == '.'
1510
and direntry->d_name[2] == '\0'))){
1513
char *fullname = NULL;
1514
ret = asprintf(&fullname, "%s/%s", tempdir,
1520
ret = remove(fullname);
1522
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1529
ret = rmdir(tempdir);
1530
if(ret == -1 and errno != ENOENT){
1536
sigemptyset(&old_sigterm_action.sa_mask);
1537
old_sigterm_action.sa_handler = SIG_DFL;
1538
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1540
perror("sigaction");
1542
raise(signal_received);