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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
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getuid(), getgid(), seteuid(),
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setgid(), pause(), _exit() */
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#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
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#include <iso646.h> /* not, or, and */
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#include <argp.h> /* struct argp_option, error_t, struct
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EX_NOHOST, EX_IOERR, EX_PROTOCOL */
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#include <sys/wait.h> /* waitpid(), WIFEXITED(),
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WEXITSTATUS(), WTERMSIG() */
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#include <grp.h> /* setgroups() */
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#include <sys/klog.h> /* klogctl() */
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pid_t hook_pid = fork();
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if(hook_pid == 0){
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/* Raise privileges */
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perror_plus("seteuid");
1416
/* Raise privileges even more */
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perror_plus("setuid");
1426
perror_plus("setgid");
1428
/* Reset supplementary groups */
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ret = setgroups(0, NULL);
1432
perror_plus("setgroups");
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dup2(devnull, STDIN_FILENO);
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close(devnull);
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dup2(STDERR_FILENO, STDOUT_FILENO);
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ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
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perror_plus("setenv");
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ret = setenv("DEVICE", interface, 1);
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perror_plus("setenv");
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ret = setenv("VERBOSE", debug ? "1" : "0", 1);
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perror_plus("setenv");
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ret = setenv("MODE", mode, 1);
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perror_plus("setenv");
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1432
char *delaystring;
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ret = asprintf(&delaystring, "%f", delay);
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perror_plus("asprintf");
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ret = setenv("DELAY", delaystring, 1);
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free(delaystring);
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perror_plus("setenv");
1469
1444
free(delaystring);
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ret = execl(fullname, direntry->d_name, mode, NULL);
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/* Work around Debian bug #633582:
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<http://bugs.debian.org/633582> */
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/* Re-raise priviliges */
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ret = seteuid(0);
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perror_plus("seteuid");
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
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if(seckey_fd == -1){
1721
perror_plus("open");
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1725
perror_plus("fstat");
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
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perror_plus("fchown");
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
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if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
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int pubkey_fd = open(pubkey, O_RDONLY);
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if(pubkey_fd == -1){
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perror_plus("open");
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ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
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perror_plus("fstat");
1748
if(S_ISREG(st.st_mode)
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and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
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perror_plus("fchown");
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TEMP_FAILURE_RETRY(close(pubkey_fd));
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if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
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int seckey_fd = open(seckey, O_RDONLY);
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if(seckey_fd == -1){
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perror_plus("open");
1698
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
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perror_plus("fstat");
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1704
ret = fchown(seckey_fd, uid, gid);
1706
perror_plus("fchown");
1710
TEMP_FAILURE_RETRY(close(seckey_fd));
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if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1715
int pubkey_fd = open(pubkey, O_RDONLY);
1716
if(pubkey_fd == -1){
1717
perror_plus("open");
1719
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1721
perror_plus("fstat");
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1725
ret = fchown(pubkey_fd, uid, gid);
1727
perror_plus("fchown");
1731
TEMP_FAILURE_RETRY(close(pubkey_fd));
1735
/* Lower privileges */
1739
perror_plus("seteuid");
1743
/* Run network hooks */
1746
/* Re-raise priviliges */
1750
perror_plus("seteuid");
1753
if(not run_network_hooks("start", interface, delay)){
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1757
/* Lower privileges */
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ret = seteuid(uid);
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2231
2220
/* Re-raise priviliges */
2236
perror_plus("seteuid");
2226
perror_plus("seteuid");
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
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2233
/* Take down the network interface */
2240
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if(take_down_interface and geteuid() == 0){
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ret = ioctl(sd, SIOCGIFFLAGS, &network);