Bug 506219

Description of problem:
In previous releases devpts in /etc/fstab was correctly introduced with

devpts                  /dev/pts                devpts  gid=5,mode=620  0 0

The options are important.  Group tty and mode 620.

In F11 the line is

devpts                  /dev/pts                devpts  defaults        0 0

At least the default mode is wrong (it is 600).

glibc made the assumption that if devpts is used the options are set correctly.  Silly me, I thought such a bug in the setup cannot happen.  I've changed glibc to not make this assumption but the setup should really be fixed, too.  Otherwise grantpt has to run the pt_chown SUID program which is slow (and broken in F11, wrong permission).  Basically, F11 has an unusable grantpt function.



Version-Release number of selected component (if applicable):
setup-2.8.3-1.fc11.noarch

How reproducible:
always

Steps to Reproduce:
1.compile the code below
2.run
3.
  
Actual results:
Mode for the new descriptor is 0600 and group is that of the user

Expected results:
Mode is 0620 and group is tty.

Additional info:

Test program.  After the grantpt call the permission should be 620 and the group tty.

#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

int
main()
{
  int fd = open ("/dev/ptmx", O_RDWR);
  if (fd < 0) {
    puts ("open failed");
    return 1;
  }
  system ("ls -l /dev/pts");
  if (grantpt (fd) < 0) {
    puts ("grantpt failed");
    return 1;
  }
  puts ("aaa");
  char *s = ptsname (fd);
  if (s == NULL) {
    puts ("ptsname failed");
    return 1;
  }
  puts (s);
  system ("ls -l /dev/pts");
  close (fd);
  return 0;
}