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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
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75
getuid(), getgid(), seteuid(),
76
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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79
#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() */
90
#include <grp.h> /* setgroups() */
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#include <sys/klog.h> /* klogctl() */
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pid_t hook_pid = fork();
1408
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if(hook_pid == 0){
1410
/* Raise privileges */
1414
perror_plus("seteuid");
1416
/* Raise privileges even more */
1420
perror_plus("setuid");
1426
perror_plus("setgid");
1428
/* Reset supplementary groups */
1430
ret = setgroups(0, NULL);
1432
perror_plus("setgroups");
1434
fprintf_plus(stderr, "Child: getuid() = %d\n", getuid());
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fprintf_plus(stderr, "Child: geteuid() = %d\n", geteuid());
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dup2(devnull, STDIN_FILENO);
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1406
close(devnull);
1438
1407
dup2(STDERR_FILENO, STDOUT_FILENO);
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ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1441
1410
perror_plus("setenv");
1444
1413
ret = setenv("DEVICE", interface, 1);
1446
1415
perror_plus("setenv");
1449
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ret = setenv("VERBOSE", debug ? "1" : "0", 1);
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1420
perror_plus("setenv");
1454
1423
ret = setenv("MODE", mode, 1);
1456
1425
perror_plus("setenv");
1459
1428
char *delaystring;
1460
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ret = asprintf(&delaystring, "%f", delay);
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1431
perror_plus("asprintf");
1465
1434
ret = setenv("DELAY", delaystring, 1);
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1436
free(delaystring);
1468
1437
perror_plus("setenv");
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free(delaystring);
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ret = execl(fullname, direntry->d_name, mode, NULL);
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1677
/* Work around Debian bug #633582:
1710
1678
<http://bugs.debian.org/633582> */
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1681
/* Re-raise priviliges */
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1683
ret = seteuid(0);
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perror_plus("seteuid");
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1727
perror_plus("fstat");
1729
if(S_ISREG(st.st_mode)
1730
and st.st_uid == 0 and st.st_gid == 0){
1731
ret = fchown(seckey_fd, uid, gid);
1733
perror_plus("fchown");
1737
TEMP_FAILURE_RETRY(close(seckey_fd));
1741
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1742
int pubkey_fd = open(pubkey, O_RDONLY);
1743
if(pubkey_fd == -1){
1744
perror_plus("open");
1746
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1748
perror_plus("fstat");
1750
if(S_ISREG(st.st_mode)
1751
and st.st_uid == 0 and st.st_gid == 0){
1752
ret = fchown(pubkey_fd, uid, gid);
1754
perror_plus("fchown");
1758
TEMP_FAILURE_RETRY(close(pubkey_fd));
1688
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1689
int seckey_fd = open(seckey, O_RDONLY);
1690
if(seckey_fd == -1){
1691
perror_plus("open");
1693
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1695
perror_plus("fstat");
1697
if(S_ISREG(st.st_mode)
1698
and st.st_uid == 0 and st.st_gid == 0){
1699
ret = fchown(seckey_fd, uid, gid);
1701
perror_plus("fchown");
1705
TEMP_FAILURE_RETRY(close(seckey_fd));
1709
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1710
int pubkey_fd = open(pubkey, O_RDONLY);
1711
if(pubkey_fd == -1){
1712
perror_plus("open");
1714
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1716
perror_plus("fstat");
1718
if(S_ISREG(st.st_mode)
1719
and st.st_uid == 0 and st.st_gid == 0){
1720
ret = fchown(pubkey_fd, uid, gid);
1722
perror_plus("fchown");
1726
TEMP_FAILURE_RETRY(close(pubkey_fd));
1730
/* Lower privileges */
1734
perror_plus("seteuid");
1738
/* Run network hooks */
1741
/* Re-raise priviliges */
1745
perror_plus("seteuid");
1748
if(not run_network_hooks("start", interface, delay)){
1762
1752
/* Lower privileges */
1764
1754
ret = seteuid(uid);
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2233
2215
/* Re-raise priviliges */
2238
perror_plus("seteuid");
2221
perror_plus("seteuid");
2224
/* Run network hooks */
2225
if(not run_network_hooks("stop", interface, delay)){
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2229
/* Take down the network interface */