47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
50
asprintf(), strncpy(), strsignal()
51
52
#include <sys/ioctl.h> /* ioctl */
52
53
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
54
sockaddr_in6, PF_INET6,
57
58
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
59
inet_pton(), connect(),
60
#include <fcntl.h> /* open(), unlinkat() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
62
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
64
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
#include <errno.h> /* perror(), errno,
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
66
71
program_invocation_short_name */
67
72
#include <time.h> /* nanosleep(), time(), sleep() */
68
73
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
814
820
/* Set effective uid to 0, return errno */
815
821
__attribute__((warn_unused_result))
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
818
error_t ret_errno = 0;
822
int raise_privileges(void){
823
int old_errno = errno;
819
825
if(seteuid(0) == -1){
822
828
errno = old_errno;
826
832
/* Set effective and real user ID to 0. Return errno. */
827
833
__attribute__((warn_unused_result))
828
error_t raise_privileges_permanently(void){
829
error_t old_errno = errno;
830
error_t ret_errno = raise_privileges();
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
832
838
errno = old_errno;
835
841
if(setuid(0) == -1){
838
844
errno = old_errno;
842
848
/* Set effective user ID to unprivileged saved user ID */
843
849
__attribute__((warn_unused_result))
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
850
int lower_privileges(void){
851
int old_errno = errno;
847
853
if(seteuid(uid) == -1){
850
856
errno = old_errno;
854
860
/* Lower privileges permanently */
855
861
__attribute__((warn_unused_result))
856
error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
859
865
if(setuid(uid) == -1){
862
868
errno = old_errno;
866
872
/* Helper function to add_local_route() and delete_local_route() */
2460
2479
.args_doc = "",
2461
2480
.doc = "Mandos client -- Get and decrypt"
2462
2481
" passwords from a Mandos server" };
2463
ret = argp_parse(&argp, argc, argv,
2464
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2482
ret_errno = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
2490
perror_plus("argp_parse");
2472
2491
exitcode = EX_OSERR;
2891
2910
/* Allocate a new server */
2892
2911
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2893
&config, NULL, NULL, &ret_errno);
2912
&config, NULL, NULL, &ret);
2895
2914
/* Free the Avahi configuration data */
2896
2915
avahi_server_config_free(&config);
2943
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2962
if(signal_received){
2963
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2964
argv[0], signal_received,
2965
strsignal(signal_received));
2967
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2946
2971
/* Cleanup things */
2998
3023
/* Take down the network interfaces which were brought up */
3000
3025
char *interface = NULL;
3001
while((interface=argz_next(interfaces_to_take_down,
3002
interfaces_to_take_down_size,
3004
ret_errno = take_down_interface(interface);
3026
while((interface = argz_next(interfaces_to_take_down,
3027
interfaces_to_take_down_size,
3029
ret = take_down_interface(interface);
3007
3032
perror_plus("Failed to take down interface");
3024
3049
free(interfaces_to_take_down);
3025
3050
free(interfaces_hooks);
3052
void clean_dir_at(int base, const char * const dirname,
3054
struct dirent **direntries = NULL;
3056
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3062
perror_plus("open");
3064
int numentries = scandirat(dir_fd, ".", &direntries,
3065
notdotentries, alphasort);
3066
if(numentries >= 0){
3067
for(int i = 0; i < numentries; i++){
3069
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3070
dirname, direntries[i]->d_name);
3072
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3074
if(errno == EISDIR){
3075
dret = unlinkat(dir_fd, direntries[i]->d_name,
3078
if((dret == -1) and (errno == ENOTEMPTY)
3079
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3080
== 0) and (level == 0)){
3081
/* Recurse only in this special case */
3082
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3086
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3087
direntries[i]->d_name, strerror(errno));
3090
free(direntries[i]);
3093
/* need to clean even if 0 because man page doesn't specify */
3095
if(numentries == -1){
3096
perror_plus("scandirat");
3098
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
if(dret == -1 and errno != ENOENT){
3100
perror_plus("rmdir");
3103
perror_plus("scandirat");
3027
3108
/* Removes the GPGME temp directory and all files inside */
3028
3109
if(tempdir != NULL){
3029
struct dirent **direntries = NULL;
3030
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3034
if(tempdir_fd == -1){
3035
perror_plus("open");
3037
int numentries = scandirat(tempdir_fd, ".", &direntries,
3038
notdotentries, alphasort);
3039
if(numentries >= 0){
3040
for(int i = 0; i < numentries; i++){
3041
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3043
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3044
" \"%s\", 0): %s\n", tempdir,
3045
direntries[i]->d_name, strerror(errno));
3047
free(direntries[i]);
3050
/* need to clean even if 0 because man page doesn't specify */
3052
if(numentries == -1){
3053
perror_plus("scandir");
3055
ret = rmdir(tempdir);
3056
if(ret == -1 and errno != ENOENT){
3057
perror_plus("rmdir");
3110
clean_dir_at(-1, tempdir, 0);