1#include <assert.h>
2#include <ctype.h>
3#include <dirent.h>
4#include <errno.h>
5#include <fcntl.h>
6#include <paths.h>
7#include <stdlib.h>
8#include <unistd.h>
9
10#include <not-cancel.h>
11
12#include "pty-private.h"
13
14#if HAVE_PT_CHOWN
15/* Close all file descriptors except the one specified. */
16static void
17close_all_fds (void)
18{
19 DIR *dir = __opendir ("/proc/self/fd");
20 if (dir != NULL)
21 {
22 struct dirent64 *d;
23 while ((d = __readdir64 (dir)) != NULL)
24 if (isdigit (d->d_name[0]))
25 {
26 char *endp;
27 long int fd = strtol (d->d_name, &endp, 10);
28 if (*endp == '\0' && fd != PTY_FILENO && fd != dirfd (dir))
29 __close_nocancel_nostatus (fd);
30 }
31
32 __closedir (dir);
33
34 int nullfd = __open_nocancel (_PATH_DEVNULL, O_RDONLY);
35 assert (nullfd == STDIN_FILENO);
36 nullfd = __open_nocancel (_PATH_DEVNULL, O_WRONLY);
37 assert (nullfd == STDOUT_FILENO);
38 __dup2 (STDOUT_FILENO, STDERR_FILENO);
39 }
40}
41# define CLOSE_ALL_FDS() close_all_fds()
42#endif
43
44#include <sysdeps/unix/grantpt.c>
45