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/* Test for vfork functions.
Copyright (C) 2007-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2007.
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 <errno.h>
#include <fcntl.h>
#include <mcheck.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>
static int do_test (void);
static void do_prepare (void);
char *tmpdirname;
#define TEST_FUNCTION do_test ()
#define PREPARE(argc, argv) do_prepare ()
#include "../test-skeleton.c"
static void
run_script (const char *script, char *const argv[])
{
for (size_t i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
FAIL_EXIT1 ("vfork failed: %m");
else if (pid == 0)
{
execvp (script, argv);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
FAIL_EXIT1 ("waitpid failed");
else if (status != 0)
{
if (WIFEXITED (status))
FAIL_EXIT1 ("%s failed with status %d\n", script,
WEXITSTATUS (status));
else
FAIL_EXIT1 ("%s killed by signal %d\n", script,
WTERMSIG (status));
}
}
}
static int
do_test (void)
{
mtrace ();
const char *path = getenv ("PATH");
if (path == NULL)
path = "/bin";
char pathbuf[strlen (tmpdirname) + 1 + strlen (path) + 1];
strcpy (stpcpy (stpcpy (pathbuf, tmpdirname), ":"), path);
if (setenv ("PATH", pathbuf, 1) < 0)
{
puts ("setenv failed");
return 1;
}
/* Although manual states first argument should be the script name itself,
current execv{p,e} implementation allows it. */
char *argv00[] = { NULL };
run_script ("script0.sh", argv00);
char *argv01[] = { (char*) "script0.sh", NULL };
run_script ("script0.sh", argv01);
char *argv1[] = { (char *) "script1.sh", (char *) "1", NULL };
run_script ("script1.sh", argv1);
char *argv2[] = { (char *) "script2.sh", (char *) "2", NULL };
run_script ("script2.sh", argv2);
/* Same as before but with execlp. */
for (size_t i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
{
printf ("vfork failed: %m\n");
return 1;
}
else if (pid == 0)
{
execlp ("script2.sh", "script2.sh", "3", NULL);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("waitpid failed");
return 1;
}
else if (status != 0)
{
printf ("script2.sh failed with status %d\n", status);
return 1;
}
}
unsetenv ("PATH");
char *argv4[] = { (char *) "echo", (char *) "script 4", NULL };
run_script ("echo", argv4);
return 0;
}
static void
create_script (const char *script, const char *contents, size_t size)
{
int fd = open (script, O_WRONLY | O_CREAT, 0700);
if (fd < 0
|| TEMP_FAILURE_RETRY (write (fd, contents, size)) != size
|| fchmod (fd, S_IRUSR | S_IXUSR) < 0)
FAIL_EXIT1 ("could not write %s\n", script);
close (fd);
}
static void
do_prepare (void)
{
size_t len = strlen (test_dir) + sizeof ("/tst-vfork3.XXXXXX");
tmpdirname = malloc (len);
if (tmpdirname == NULL)
FAIL_EXIT1 ("out of memory");
strcpy (stpcpy (tmpdirname, test_dir), "/tst-vfork3.XXXXXX");
tmpdirname = mkdtemp (tmpdirname);
if (tmpdirname == NULL)
FAIL_EXIT1 ("could not create temporary directory");
char script0[len + sizeof "/script0.sh"];
char script1[len + sizeof "/script1.sh"];
char script2[len + sizeof "/script2.sh"];
strcpy (stpcpy (script0, tmpdirname), "/script0.sh");
strcpy (stpcpy (script1, tmpdirname), "/script1.sh");
strcpy (stpcpy (script2, tmpdirname), "/script2.sh");
add_temp_file (tmpdirname);
add_temp_file (script0);
add_temp_file (script1);
add_temp_file (script2);
const char content0[] = "#!/bin/sh\necho empty\n";
create_script (script0, content0, sizeof content0);
const char content1[] = "#!/bin/sh\necho script $1\n";
create_script (script1, content1, sizeof content1);
const char content2[] = "echo script $1\n";
create_script (script2, content2, sizeof content2);
}
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