32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
52
51
#include <sys/ioctl.h> /* ioctl */
53
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
54
53
sockaddr_in6, PF_INET6,
58
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
59
58
inet_pton(), connect(),
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open() */
62
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
64
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
65
#include <errno.h> /* perror(), errno,
71
66
program_invocation_short_name */
72
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
573
557
safer_gnutls_strerror(ret));
576
/* If a Diffie-Hellman parameters file was given, try to use it */
577
if(dhparamsfilename != NULL){
578
gnutls_datum_t params = { .data = NULL, .size = 0 };
580
int dhpfile = open(dhparamsfilename, O_RDONLY);
583
dhparamsfilename = NULL;
586
size_t params_capacity = 0;
588
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params_capacity);
591
if(params_capacity == 0){
592
perror_plus("incbuffer");
595
dhparamsfilename = NULL;
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
605
/* check bytes_read for failure */
610
dhparamsfilename = NULL;
613
params.size += (unsigned int)bytes_read;
615
if(params.data == NULL){
616
dhparamsfilename = NULL;
618
if(dhparamsfilename == NULL){
621
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
622
GNUTLS_X509_FMT_PEM);
623
if(ret != GNUTLS_E_SUCCESS){
624
fprintf_plus(stderr, "Failed to parse DH parameters in file"
625
" \"%s\": %s\n", dhparamsfilename,
626
safer_gnutls_strerror(ret));
627
dhparamsfilename = NULL;
631
if(dhparamsfilename == NULL){
632
if(mc->dh_bits == 0){
633
/* Find out the optimal number of DH bits */
634
/* Try to read the private key file */
635
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
637
int secfile = open(seckeyfilename, O_RDONLY);
642
size_t buffer_capacity = 0;
644
buffer_capacity = incbuffer((char **)&buffer.data,
646
(size_t)buffer_capacity);
647
if(buffer_capacity == 0){
648
perror_plus("incbuffer");
653
ssize_t bytes_read = read(secfile,
654
buffer.data + buffer.size,
660
/* check bytes_read for failure */
667
buffer.size += (unsigned int)bytes_read;
671
/* If successful, use buffer to parse private key */
672
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
673
if(buffer.data != NULL){
675
gnutls_openpgp_privkey_t privkey = NULL;
676
ret = gnutls_openpgp_privkey_init(&privkey);
677
if(ret != GNUTLS_E_SUCCESS){
678
fprintf_plus(stderr, "Error initializing OpenPGP key"
680
safer_gnutls_strerror(ret));
684
ret = gnutls_openpgp_privkey_import
685
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
686
if(ret != GNUTLS_E_SUCCESS){
687
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
688
safer_gnutls_strerror(ret));
694
/* Use private key to suggest an appropriate
696
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
697
gnutls_openpgp_privkey_deinit(privkey);
699
fprintf_plus(stderr, "This OpenPGP key implies using"
700
" a GnuTLS security parameter \"%s\".\n",
701
safe_string(gnutls_sec_param_get_name
707
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
708
/* Err on the side of caution */
709
sec_param = GNUTLS_SEC_PARAM_ULTRA;
711
fprintf_plus(stderr, "Falling back to security parameter"
713
safe_string(gnutls_sec_param_get_name
718
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
722
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
723
" implies %u DH bits; using that.\n",
724
safe_string(gnutls_sec_param_get_name
729
fprintf_plus(stderr, "Failed to get implied number of DH"
730
" bits for security parameter \"%s\"): %s\n",
731
safe_string(gnutls_sec_param_get_name
733
safer_gnutls_strerror(ret));
737
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
740
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
741
if(ret != GNUTLS_E_SUCCESS){
742
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
743
" bits): %s\n", mc->dh_bits,
744
safer_gnutls_strerror(ret));
560
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
561
if(ret != GNUTLS_E_SUCCESS){
562
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
563
safer_gnutls_strerror(ret));
748
567
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
816
638
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
817
639
__attribute__((unused)) const char *txt){}
819
/* Set effective uid to 0, return errno */
820
__attribute__((warn_unused_result))
821
int raise_privileges(void){
822
int old_errno = errno;
824
if(seteuid(0) == -1){
831
/* Set effective and real user ID to 0. Return errno. */
832
__attribute__((warn_unused_result))
833
int raise_privileges_permanently(void){
834
int old_errno = errno;
835
int ret = raise_privileges();
847
/* Set effective user ID to unprivileged saved user ID */
848
__attribute__((warn_unused_result))
849
int lower_privileges(void){
850
int old_errno = errno;
852
if(seteuid(uid) == -1){
859
/* Lower privileges permanently */
860
__attribute__((warn_unused_result))
861
int lower_privileges_permanently(void){
862
int old_errno = errno;
864
if(setuid(uid) == -1){
871
/* Helper function to add_local_route() and delete_local_route() */
872
__attribute__((nonnull, warn_unused_result))
873
static bool add_delete_local_route(const bool add,
875
AvahiIfIndex if_index){
877
char helper[] = "mandos-client-iprouteadddel";
878
char add_arg[] = "add";
879
char delete_arg[] = "delete";
880
char debug_flag[] = "--debug";
881
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
882
if(pluginhelperdir == NULL){
884
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
885
" variable not set; cannot run helper\n");
890
char interface[IF_NAMESIZE];
891
if(if_indextoname((unsigned int)if_index, interface) == NULL){
892
perror_plus("if_indextoname");
896
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
898
perror_plus("open(\"/dev/null\", O_RDONLY)");
904
/* Raise privileges */
905
errno = raise_privileges_permanently();
907
perror_plus("Failed to raise privileges");
908
/* _exit(EX_NOPERM); */
914
perror_plus("setgid");
917
/* Reset supplementary groups */
919
ret = setgroups(0, NULL);
921
perror_plus("setgroups");
925
ret = dup2(devnull, STDIN_FILENO);
927
perror_plus("dup2(devnull, STDIN_FILENO)");
930
ret = close(devnull);
932
perror_plus("close");
935
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
937
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
940
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
945
if(helperdir_fd == -1){
947
_exit(EX_UNAVAILABLE);
949
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
952
perror_plus("openat");
954
_exit(EX_UNAVAILABLE);
958
#pragma GCC diagnostic push
959
#pragma GCC diagnostic ignored "-Wcast-qual"
961
if(fexecve(helper_fd, (char *const [])
962
{ helper, add ? add_arg : delete_arg, (char *)address,
963
interface, debug ? debug_flag : NULL, NULL },
966
#pragma GCC diagnostic pop
968
perror_plus("fexecve");
980
pret = waitpid(pid, &status, 0);
981
if(pret == -1 and errno == EINTR and quit_now){
982
int errno_raising = 0;
983
if((errno = raise_privileges()) != 0){
984
errno_raising = errno;
985
perror_plus("Failed to raise privileges in order to"
986
" kill helper program");
988
if(kill(pid, SIGTERM) == -1){
991
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
992
perror_plus("Failed to lower privileges after killing"
997
} while(pret == -1 and errno == EINTR);
999
perror_plus("waitpid");
1002
if(WIFEXITED(status)){
1003
if(WEXITSTATUS(status) != 0){
1004
fprintf_plus(stderr, "Error: iprouteadddel exited"
1005
" with status %d\n", WEXITSTATUS(status));
1010
if(WIFSIGNALED(status)){
1011
fprintf_plus(stderr, "Error: iprouteadddel died by"
1012
" signal %d\n", WTERMSIG(status));
1015
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1019
__attribute__((nonnull, warn_unused_result))
1020
static bool add_local_route(const char *address,
1021
AvahiIfIndex if_index){
1023
fprintf_plus(stderr, "Adding route to %s\n", address);
1025
return add_delete_local_route(true, address, if_index);
1028
__attribute__((nonnull, warn_unused_result))
1029
static bool delete_local_route(const char *address,
1030
AvahiIfIndex if_index){
1032
fprintf_plus(stderr, "Removing route to %s\n", address);
1034
return add_delete_local_route(false, address, if_index);
1037
641
/* Called when a Mandos server is found */
1038
642
__attribute__((nonnull, warn_unused_result))
1039
643
static int start_mandos_communication(const char *ip, in_port_t port,
1210
812
goto mandos_end;
1215
ret = connect(tcp_sd, (struct sockaddr *)&to,
1216
sizeof(struct sockaddr_in6));
1218
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1219
sizeof(struct sockaddr_in));
1222
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1223
and if_index != AVAHI_IF_UNSPEC
1224
and connect_to == NULL
1225
and not route_added and
1226
((af == AF_INET6 and not
1227
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1229
or (af == AF_INET and
1230
/* Not a a IPv4LL address */
1231
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1232
& 0xFFFF0000L) != 0xA9FE0000L))){
1233
/* Work around Avahi bug - Avahi does not announce link-local
1234
addresses if it has a global address, so local hosts with
1235
*only* a link-local address (e.g. Mandos clients) cannot
1236
connect to a Mandos server announced by Avahi on a server
1237
host with a global address. Work around this by retrying
1238
with an explicit route added with the server's address.
1240
Avahi bug reference:
1241
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1242
https://bugs.debian.org/587961
1245
fprintf_plus(stderr, "Mandos server unreachable, trying"
1249
route_added = add_local_route(ip, if_index);
1255
if(errno != ECONNREFUSED or debug){
1257
perror_plus("connect");
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
825
perror_plus("connect");
1270
836
const char *out = mandos_protocol_version;
1460
/* Set effective uid to 0, return errno */
1461
__attribute__((warn_unused_result))
1462
error_t raise_privileges(void){
1463
error_t old_errno = errno;
1464
error_t ret_errno = 0;
1465
if(seteuid(0) == -1){
1467
perror_plus("seteuid");
1473
/* Set effective and real user ID to 0. Return errno. */
1474
__attribute__((warn_unused_result))
1475
error_t raise_privileges_permanently(void){
1476
error_t old_errno = errno;
1477
error_t ret_errno = raise_privileges();
1482
if(setuid(0) == -1){
1484
perror_plus("seteuid");
1490
/* Set effective user ID to unprivileged saved user ID */
1491
__attribute__((warn_unused_result))
1492
error_t lower_privileges(void){
1493
error_t old_errno = errno;
1494
error_t ret_errno = 0;
1495
if(seteuid(uid) == -1){
1497
perror_plus("seteuid");
1503
/* Lower privileges permanently */
1504
__attribute__((warn_unused_result))
1505
error_t lower_privileges_permanently(void){
1506
error_t old_errno = errno;
1507
error_t ret_errno = 0;
1508
if(setuid(uid) == -1){
1510
perror_plus("setuid");
1905
1516
__attribute__((nonnull))
1906
1517
void run_network_hooks(const char *mode, const char *interface,
1907
1518
const float delay){
1908
struct dirent **direntries = NULL;
1909
if(hookdir_fd == -1){
1910
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1912
if(hookdir_fd == -1){
1913
if(errno == ENOENT){
1915
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1916
" found\n", hookdir);
1919
perror_plus("open");
1924
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1925
runnable_hook, alphasort);
1519
struct dirent **direntries;
1520
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1926
1522
if(numhooks == -1){
1927
perror_plus("scandir");
1930
struct dirent *direntry;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1937
for(int i = 0; i < numhooks; i++){
1938
direntry = direntries[i];
1940
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1523
if(errno == ENOENT){
1525
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1526
" found\n", hookdir);
1529
perror_plus("scandir");
1943
pid_t hook_pid = fork();
1946
/* Raise privileges */
1947
errno = raise_privileges_permanently();
1949
perror_plus("Failed to raise privileges");
1956
perror_plus("setgid");
1959
/* Reset supplementary groups */
1961
ret = setgroups(0, NULL);
1963
perror_plus("setgroups");
1966
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1968
perror_plus("setenv");
1971
ret = setenv("DEVICE", interface, 1);
1973
perror_plus("setenv");
1976
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1978
perror_plus("setenv");
1981
ret = setenv("MODE", mode, 1);
1983
perror_plus("setenv");
1987
ret = asprintf(&delaystring, "%f", (double)delay);
1532
struct dirent *direntry;
1534
int devnull = open("/dev/null", O_RDONLY);
1535
for(int i = 0; i < numhooks; i++){
1536
direntry = direntries[i];
1537
char *fullname = NULL;
1538
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1989
1540
perror_plus("asprintf");
1992
ret = setenv("DELAY", delaystring, 1);
1544
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1547
pid_t hook_pid = fork();
1550
/* Raise privileges */
1551
if(raise_privileges_permanently() != 0){
1552
perror_plus("Failed to raise privileges");
1559
perror_plus("setgid");
1562
/* Reset supplementary groups */
1564
ret = setgroups(0, NULL);
1566
perror_plus("setgroups");
1569
ret = dup2(devnull, STDIN_FILENO);
1571
perror_plus("dup2(devnull, STDIN_FILENO)");
1574
ret = close(devnull);
1576
perror_plus("close");
1579
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1581
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1584
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1586
perror_plus("setenv");
1589
ret = setenv("DEVICE", interface, 1);
1591
perror_plus("setenv");
1594
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1596
perror_plus("setenv");
1599
ret = setenv("MODE", mode, 1);
1601
perror_plus("setenv");
1605
ret = asprintf(&delaystring, "%f", (double)delay);
1607
perror_plus("asprintf");
1610
ret = setenv("DELAY", delaystring, 1);
1613
perror_plus("setenv");
1994
1616
free(delaystring);
1995
perror_plus("setenv");
1999
if(connect_to != NULL){
2000
ret = setenv("CONNECT", connect_to, 1);
2002
perror_plus("setenv");
2006
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2010
perror_plus("openat");
2011
_exit(EXIT_FAILURE);
2013
if(close(hookdir_fd) == -1){
2014
perror_plus("close");
2015
_exit(EXIT_FAILURE);
2017
ret = dup2(devnull, STDIN_FILENO);
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2022
ret = close(devnull);
2024
perror_plus("close");
2027
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2029
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2032
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2034
perror_plus("fexecve");
2035
_exit(EXIT_FAILURE);
2039
perror_plus("fork");
2044
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2045
perror_plus("waitpid");
2049
if(WIFEXITED(status)){
2050
if(WEXITSTATUS(status) != 0){
2051
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2052
" with status %d\n", direntry->d_name,
2053
WEXITSTATUS(status));
2057
} else if(WIFSIGNALED(status)){
2058
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2059
" signal %d\n", direntry->d_name,
1617
if(connect_to != NULL){
1618
ret = setenv("CONNECT", connect_to, 1);
1620
perror_plus("setenv");
1624
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1625
perror_plus("execl");
1626
_exit(EXIT_FAILURE);
2064
fprintf_plus(stderr, "Warning: network hook \"%s\""
2065
" crashed\n", direntry->d_name);
2071
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2077
if(close(hookdir_fd) == -1){
2078
perror_plus("close");
1630
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1631
perror_plus("waitpid");
1635
if(WIFEXITED(status)){
1636
if(WEXITSTATUS(status) != 0){
1637
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1638
" with status %d\n", direntry->d_name,
1639
WEXITSTATUS(status));
1643
} else if(WIFSIGNALED(status)){
1644
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1645
" signal %d\n", direntry->d_name,
1650
fprintf_plus(stderr, "Warning: network hook \"%s\""
1651
" crashed\n", direntry->d_name);
1658
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2085
1666
__attribute__((nonnull, warn_unused_result))
2086
int bring_up_interface(const char *const interface,
2088
int old_errno = errno;
1667
error_t bring_up_interface(const char *const interface,
1669
error_t old_errno = errno;
2090
1671
struct ifreq network;
2091
1672
unsigned int if_index = if_nametoindex(interface);
3048
2573
free(interfaces_to_take_down);
3049
2574
free(interfaces_hooks);
3051
void clean_dir_at(int base, const char * const dirname,
3053
struct dirent **direntries = NULL;
3055
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3061
perror_plus("open");
3063
int numentries = scandirat(dir_fd, ".", &direntries,
3064
notdotentries, alphasort);
3065
if(numentries >= 0){
3066
for(int i = 0; i < numentries; i++){
3068
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3069
dirname, direntries[i]->d_name);
3071
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3073
if(errno == EISDIR){
3074
dret = unlinkat(dir_fd, direntries[i]->d_name,
3077
if((dret == -1) and (errno == ENOTEMPTY)
3078
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3079
== 0) and (level == 0)){
3080
/* Recurse only in this special case */
3081
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3085
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3086
direntries[i]->d_name, strerror(errno));
3089
free(direntries[i]);
3092
/* need to clean even if 0 because man page doesn't specify */
3094
if(numentries == -1){
3095
perror_plus("scandirat");
3097
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3098
if(dret == -1 and errno != ENOENT){
3099
perror_plus("rmdir");
3102
perror_plus("scandirat");
3107
2576
/* Removes the GPGME temp directory and all files inside */
3108
2577
if(tempdir != NULL){
3109
clean_dir_at(-1, tempdir, 0);
2578
struct dirent **direntries = NULL;
2579
struct dirent *direntry = NULL;
2580
int numentries = scandir(tempdir, &direntries, notdotentries,
2583
for(int i = 0; i < numentries; i++){
2584
direntry = direntries[i];
2585
char *fullname = NULL;
2586
ret = asprintf(&fullname, "%s/%s", tempdir,
2589
perror_plus("asprintf");
2592
ret = remove(fullname);
2594
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2601
/* need to clean even if 0 because man page doesn't specify */
2603
if(numentries == -1){
2604
perror_plus("scandir");
2606
ret = rmdir(tempdir);
2607
if(ret == -1 and errno != ENOENT){
2608
perror_plus("rmdir");