Bug#734607: libc6-i686: granpt() fails with EPERM

[Jakub Wilk <jwilk@debian.org>]

Package: libc6-i686
Version: 2.18-0experimental0
Severity: important

grantpt() always fail with errno=EPERM:

$ ./test_grantpt
grantpt: Operation not permitted

Curiously enough, the non-686-optimized versions works correctly:

$ LD_HWCAP_MASK=0 ./test_grantpt
okay!


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 3.12-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libc6-i686 depends on:
ii  libc6  2.18-0experimental0

--
Jakub Wilk

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>

int main(int arg, char **argv)
{
	int fd = getpt();
	if (fd == -1) {
		perror("getpt");
		return 1;
	}
	int rc = grantpt(fd);
	if (rc != 0) {
		perror("grantpt");
		return 1;
	}
	fprintf(stderr, "okay!\n");
	exit(0);
}