static void __check_one_fd(int fd, int mode)
{
/* Check if the specified fd is already open */
- if (unlikely(__libc_fcntl(fd, F_GETFD)==-1 && *(__errno_location())==EBADF))
+ if (__libc_fcntl(fd, F_GETFD) == -1)
{
/* The descriptor is probably not open, so try to use /dev/null */
- struct stat st;
int nullfd = __libc_open(_PATH_DEVNULL, mode);
/* /dev/null is major=1 minor=3. Make absolutely certain
* that is in fact the device that we have opened and not
* some other wierd file... */
- if ( (nullfd!=fd) || fstat(fd, &st) || !S_ISCHR(st.st_mode) ||
- (st.st_rdev != makedev(1, 3)))
+ if (nullfd!=fd)
{
abort();
}
uid = getuid();
euid = geteuid();
+ if (uid != euid)
+ return 1;
gid = getgid();
egid = getegid();
-
- if(uid == euid && gid == egid) {
- return 0;
- }
- return 1;
+ if (gid != egid)
+ return 1;
+ return 0; /* we are not suid */
}
#endif