glibc/stdio-common/tst-tmpnam.c

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/* Copyright (C) 1998-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int
main (void)
{
const char *name;
int retval = 0;
/* Set TMPDIR to a value other than the traditional /tmp. */
setenv ("TMPDIR", "/usr", 1);
name = tmpnam (NULL);
printf ("name = %s\n", name);
/* Make sure the name is not based on the value in TMPDIR. */
if (strncmp (name, "/usr", 4) == 0)
{
puts ("error: `tmpnam' used TMPDIR value");
retval = 1;
}
/* Test that it is in the directory denoted by P_tmpdir. */
if (strncmp (name, P_tmpdir, sizeof (P_tmpdir) - 1) != 0)
{
puts ("error: `tmpnam' return value not in P_tmpdir directory");
retval = 1;
}
return retval;
}