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/* Copyright (C) 2017-2021 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/>. */
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <support/check.h>
/* Try executing "/bin/sh -c true", using FD opened on /bin/sh. */
static int
try_fexecve (int fd)
{
pid_t pid = fork ();
if (pid == 0)
{
static const char *const argv[] = {
"/bin/sh", "-c", "true", NULL
};
fexecve (fd, (char *const *) argv, environ);
_exit (errno);
}
if (pid < 0)
FAIL_RET ("fork failed: %m");
pid_t termpid;
int status;
termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
if (termpid == -1)
FAIL_RET ("waitpid failed: %m");
if (termpid != pid)
FAIL_RET ("waitpid returned %ld != %ld",
(long int) termpid, (long int) pid);
if (!WIFEXITED (status))
FAIL_RET ("child hasn't exited normally");
/* If fexecve is unimplemented mark this test as UNSUPPORTED. */
if (WEXITSTATUS (status) == ENOSYS)
FAIL_UNSUPPORTED ("fexecve is unimplemented");
if (WEXITSTATUS (status) != 0)
{
errno = WEXITSTATUS (status);
FAIL_RET ("fexecve failed: %m");
}
return 0;
}
static int
do_test (void)
{
int fd;
int ret;
fd = open ("/bin/sh", O_RDONLY);
if (fd < 0)
FAIL_UNSUPPORTED ("/bin/sh cannot be opened: %m");
ret = try_fexecve (fd);
close (fd);
#ifdef O_PATH
fd = open ("/bin/sh", O_RDONLY | O_PATH);
if (fd < 0)
FAIL_UNSUPPORTED ("/bin/sh cannot be opened (O_PATH): %m");
ret |= try_fexecve (fd);
close (fd);
#endif
return ret;
}
#include <support/test-driver.c>
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