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[PATCH] PATCH some cleanups and security fixes

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posted by Steve Grubb on https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=130351
This commit is contained in:
harald@redhat.com 2004-10-06 00:48:10 -07:00 committed by Greg KH
parent a551c7b0ce
commit c8fa2d8b41
1 changed files with 37 additions and 5 deletions
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40
udevd.c
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@ -45,9 +45,9 @@
static int pipefds[2];
static unsigned long long expected_seqnum = 0;
volatile static int children_waiting;
volatile static int run_msg_q;
volatile static int sig_flag;
static volatile int children_waiting;
static volatile int run_msg_q;
static volatile int sig_flag;
static int run_exec_q;
static LIST_HEAD(msg_list);
@ -397,7 +397,7 @@ int main(int argc, char *argv[])
int ssock, maxsockplus;
struct sockaddr_un saddr;
socklen_t addrlen;
int retval;
int retval, fd;
const int on = 1;
struct sigaction act;
fd_set readfds;
@ -409,6 +409,22 @@ int main(int argc, char *argv[])
dbg("need to be root, exit");
exit(1);
}
/* make sure we are at top of dir */
chdir("/");
umask( umask( 077 ) | 022 );
/* Set fds to dev/null */
fd = open( "/dev/null", O_RDWR );
if ( fd < 0 ) {
dbg("error opening /dev/null %s", strerror(errno));
exit(1);
}
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2)
close(fd);
/* Get new session id so stray signals don't come our way. */
setsid();
/* setup signal handler pipe */
retval = pipe(pipefds);
@ -422,12 +438,23 @@ int main(int argc, char *argv[])
dbg("error fcntl on read pipe: %s", strerror(errno));
exit(1);
}
retval = fcntl(pipefds[0], F_SETFD, FD_CLOEXEC);
if (retval < 0) {
dbg("error fcntl on read pipe: %s", strerror(errno));
exit(1);
}
retval = fcntl(pipefds[1], F_SETFL, O_NONBLOCK);
if (retval < 0) {
dbg("error fcntl on write pipe: %s", strerror(errno));
exit(1);
}
retval = fcntl(pipefds[1], F_SETFD, FD_CLOEXEC);
if (retval < 0) {
dbg("error fcntl on write pipe: %s", strerror(errno));
exit(1);
}
/* set signal handlers */
act.sa_handler = sig_handler;
@ -456,6 +483,11 @@ int main(int argc, char *argv[])
dbg("bind failed, exit");
goto exit;
}
retval = fcntl(ssock, F_SETFD, FD_CLOEXEC);
if (retval < 0) {
dbg("error fcntl on ssock: %s", strerror(errno));
exit(1);
}
/* enable receiving of the sender credentials */
setsockopt(ssock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));