57
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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
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inet_pton(), connect(),
60
#include <fcntl.h> /* open(), unlinkat() */
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#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
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#include <dirent.h> /* opendir(), struct dirent, readdir()
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#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
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#include <errno.h> /* perror(), errno,
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
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EAI_SYSTEM, ENETUNREACH,
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EHOSTUNREACH, ECONNREFUSED, EPROTO,
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EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
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program_invocation_short_name */
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#include <time.h> /* nanosleep(), time(), sleep() */
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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818
/* Set effective uid to 0, return errno */
815
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__attribute__((warn_unused_result))
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
818
error_t ret_errno = 0;
820
int raise_privileges(void){
821
int old_errno = errno;
819
823
if(seteuid(0) == -1){
822
826
errno = old_errno;
826
830
/* Set effective and real user ID to 0. Return errno. */
827
831
__attribute__((warn_unused_result))
828
error_t raise_privileges_permanently(void){
829
error_t old_errno = errno;
830
error_t ret_errno = raise_privileges();
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
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836
errno = old_errno;
835
839
if(setuid(0) == -1){
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errno = old_errno;
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846
/* Set effective user ID to unprivileged saved user ID */
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__attribute__((warn_unused_result))
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
848
int lower_privileges(void){
849
int old_errno = errno;
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851
if(seteuid(uid) == -1){
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errno = old_errno;
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858
/* Lower privileges permanently */
855
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__attribute__((warn_unused_result))
856
error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
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863
if(setuid(uid) == -1){
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866
errno = old_errno;
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870
/* Helper function to add_local_route() and delete_local_route() */
2460
2477
.args_doc = "",
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2478
.doc = "Mandos client -- Get and decrypt"
2462
2479
" passwords from a Mandos server" };
2463
ret = argp_parse(&argp, argc, argv,
2464
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
ret_errno = argp_parse(&argp, argc, argv,
2481
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
2488
perror_plus("argp_parse");
2472
2489
exitcode = EX_OSERR;
2891
2908
/* Allocate a new server */
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2909
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2893
&config, NULL, NULL, &ret_errno);
2910
&config, NULL, NULL, &ret);
2895
2912
/* Free the Avahi configuration data */
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2913
avahi_server_config_free(&config);
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free(interfaces_to_take_down);
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free(interfaces_hooks);
3044
void clean_dir_at(int base, const char * const dirname,
3046
struct dirent **direntries = NULL;
3048
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3054
perror_plus("open");
3056
int numentries = scandirat(dir_fd, ".", &direntries,
3057
notdotentries, alphasort);
3058
if(numentries >= 0){
3059
for(int i = 0; i < numentries; i++){
3061
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3062
dirname, direntries[i]->d_name);
3064
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3066
if(errno == EISDIR){
3067
dret = unlinkat(dir_fd, direntries[i]->d_name,
3070
if((dret == -1) and (errno == ENOTEMPTY)
3071
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3072
== 0) and (level == 0)){
3073
/* Recurse only in this special case */
3074
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3078
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3079
direntries[i]->d_name, strerror(errno));
3082
free(direntries[i]);
3085
/* need to clean even if 0 because man page doesn't specify */
3087
if(numentries == -1){
3088
perror_plus("scandirat");
3090
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3091
if(dret == -1 and errno != ENOENT){
3092
perror_plus("rmdir");
3095
perror_plus("scandirat");
3027
3100
/* Removes the GPGME temp directory and all files inside */
3028
3101
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");
3102
clean_dir_at(-1, tempdir, 0);