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/* Copyright (C) 2012-2021 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
<https://www.gnu.org/licenses/>. */
/* Test that secure_getenv works by invoking the test as a SGID
program with a group ID from the supplementary group list. This
test can fail spuriously if the user is not a member of a suitable
supplementary group. */
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <support/check.h>
#include <support/support.h>
#include <support/capture_subprocess.h>
#include <support/test-driver.h>
static char MAGIC_ARGUMENT[] = "run-actual-test";
static int
do_test (void)
{
if (getenv ("PATH") == NULL)
{
printf ("PATH not set\n");
exit (1);
}
if (secure_getenv ("PATH") == NULL)
{
printf ("PATH not set according to secure_getenv\n");
exit (1);
}
if (strcmp (getenv ("PATH"), secure_getenv ("PATH")) != 0)
{
printf ("PATH mismatch (%s, %s)\n",
getenv ("PATH"), secure_getenv ("PATH"));
exit (1);
}
int status = support_capture_subprogram_self_sgid (MAGIC_ARGUMENT);
if (WEXITSTATUS (status) == EXIT_UNSUPPORTED)
return EXIT_UNSUPPORTED;
if (!WIFEXITED (status))
FAIL_EXIT1 ("Unexpected exit status %d from child process\n", status);
return 0;
}
static void
alternative_main (int argc, char **argv)
{
if (argc == 2 && strcmp (argv[1], MAGIC_ARGUMENT) == 0)
{
if (getgid () == getegid ())
/* This can happen if the file system is mounted nosuid. */
FAIL_UNSUPPORTED ("SGID failed: GID and EGID match (%jd)\n",
(intmax_t) getgid ());
if (getenv ("PATH") == NULL)
FAIL_EXIT (3, "PATH variable not present\n");
if (secure_getenv ("PATH") != NULL)
FAIL_EXIT (4, "PATH variable not filtered out\n");
exit (EXIT_SUCCESS);
}
}
#define PREPARE alternative_main
#include <support/test-driver.c>
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