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chroot

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This commit is contained in:
Bjorn Andersson 2006-06-11 14:29:36 +00:00
parent ccae5695c0
commit b7dc8a3779
2 changed files with 39 additions and 16 deletions
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28
iodine.c
View file

@ -105,14 +105,16 @@ extern char *__progname;
static void
usage() {
printf("Usage: %s [-v] [-h] [-f] [-u user] nameserver topdomain\n", __progname);
printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] "
"nameserver topdomain\n", __progname);
exit(2);
}
static void
help() {
printf("iodine IP over DNS tunneling client\n");
printf("Usage: %s [-v] [-h] [-f] [-u user] nameserver topdomain\n", __progname);
printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] "
"nameserver topdomain\n", __progname);
printf(" -f is to keep running in foreground\n");
printf(" -u name to drop privileges and run as user 'name'\n");
exit(0);
@ -129,17 +131,18 @@ version() {
int
main(int argc, char **argv)
{
int choice;
int tun_fd;
int dns_fd;
int choice;
char *newroot;
char *username;
struct passwd *pw;
int foreground;
struct passwd *pw;
username = NULL;
foreground = 0;
while ((choice = getopt(argc, argv, "vfhu:")) != -1) {
while ((choice = getopt(argc, argv, "vfhu:t:")) != -1) {
switch(choice) {
case 'v':
version();
@ -153,9 +156,12 @@ main(int argc, char **argv)
case 'u':
username = optarg;
break;
case 't':
newroot = optarg;
break;
default:
usage();
break;
/* NOTREACHED */
}
}
@ -167,9 +173,8 @@ main(int argc, char **argv)
argc -= optind;
argv += optind;
if (argc != 2) {
if (argc != 2)
usage();
}
if(username) {
pw = getpwnam(username);
@ -183,6 +188,13 @@ main(int argc, char **argv)
dns_fd = open_dns(argv[0], argv[1]);
signal(SIGINT, sigint);
if (newroot) {
if (chroot(newroot) != 0 || chdir("/") != 0)
err(1, "%s", newroot);
seteuid(geteuid());
setuid(getuid());
}
if (!foreground) {
daemon(0, 0);

27
iodined.c
View file

@ -108,14 +108,15 @@ extern char *__progname;
static void
usage() {
printf("Usage: %s [-v] [-h] [-f] [-u user] topdomain\n", __progname);
printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] topdomain\n", __progname);
exit(2);
}
static void
help() {
printf("iodine IP over DNS tunneling server\n");
printf("Usage: %s [-v] [-h] [-f] [-u user] topdomain\n", __progname);
printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] "
"topdomain\n", __progname);
printf(" -f to keep running in foreground\n");
printf(" -u name to drop privileges and run as user 'name'\n");
exit(0);
@ -132,17 +133,18 @@ version() {
int
main(int argc, char **argv)
{
int choice;
int tun_fd;
int dnsd_fd;
int choice;
char *newroot;
char *username;
struct passwd *pw;
int foreground;
struct passwd *pw;
username = NULL;
foreground = 0;
while ((choice = getopt(argc, argv, "vfhu:")) != -1) {
while ((choice = getopt(argc, argv, "vfhu:t:")) != -1) {
switch(choice) {
case 'v':
version();
@ -156,9 +158,12 @@ main(int argc, char **argv)
case 'u':
username = optarg;
break;
case 't':
newroot = optarg;
break;
default:
usage();
break;
/* NOTREACHED */
}
}
@ -170,9 +175,8 @@ main(int argc, char **argv)
usage();
}
if (argc != 1) {
if (argc != 1)
usage();
}
if (username) {
pw = getpwnam(username);
@ -185,6 +189,13 @@ main(int argc, char **argv)
tun_fd = open_tun();
dnsd_fd = open_dnsd(argv[0]);
if (newroot) {
if (chroot(newroot) != 0 || chdir("/") != 0)
err(1, "%s", newroot);
seteuid(geteuid());
setuid(getuid());
}
if (!foreground) {
daemon(0, 0);
umask(0);