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/* Test of posix_spawn() function.
Copyright (C) 2020-2021 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <spawn.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "macros.h"
#define DATA_FILENAME "test-posix_spawn-script.tmp"
int
main ()
{
unlink (DATA_FILENAME);
/* Check an invocation of an executable script.
This should only be supported if the script has a '#!' marker; otherwise
it is unsecure: <https://sourceware.org/bugzilla/show_bug.cgi?id=13134>.
POSIX says that the execlp() and execvp() functions support executing
shell scripts
<https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
but this is considered an antiquated feature. */
pid_t child;
posix_spawn_file_actions_t actions;
ASSERT (posix_spawn_file_actions_init (&actions) == 0);
ASSERT (posix_spawn_file_actions_addopen (&actions, STDOUT_FILENO,
DATA_FILENAME,
O_RDWR | O_CREAT | O_TRUNC, 0600)
== 0);
{
size_t i;
for (i = 0; i < 2; i++)
{
const char *prog_path =
(i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
const char *prog_argv[2] = { prog_path, NULL };
int err = posix_spawn (&child, prog_path, &actions, NULL,
(char **) prog_argv, environ);
if (err != ENOEXEC)
{
if (err != 0)
{
errno = err;
perror ("posix_spawn");
return 1;
}
/* Wait for child. */
int status = 0;
while (waitpid (child, &status, 0) != child)
;
if (!WIFEXITED (status))
{
fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
return 1;
}
int exitstatus = WEXITSTATUS (status);
if (exitstatus != 127)
{
fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
return 1;
}
}
}
}
#if defined _WIN32 && !defined __CYGWIN__
/* On native Windows, scripts - even with '#!' marker - are not executable.
Only .bat and .cmd files are. */
fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
return 77;
#else
{
const char *prog_path = SRCDIR "executable-shell-script";
const char *prog_argv[2] = { prog_path, NULL };
int err = posix_spawn (&child, prog_path, &actions, NULL,
(char **) prog_argv, environ);
if (err != 0)
{
errno = err;
perror ("posix_spawn");
return 1;
}
posix_spawn_file_actions_destroy (&actions);
/* Wait for child. */
int status = 0;
while (waitpid (child, &status, 0) != child)
;
if (!WIFEXITED (status))
{
fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
return 1;
}
int exitstatus = WEXITSTATUS (status);
if (exitstatus != 0)
{
fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
return 1;
}
/* Check the contents of the data file. */
FILE *fp = fopen (DATA_FILENAME, "rb");
if (fp == NULL)
{
perror ("cannot open data file");
return 1;
}
char buf[1024];
int nread = fread (buf, 1, sizeof (buf), fp);
if (!(nread == 11 && memcmp (buf, "Halle Potta", 11) == 0))
{
fprintf (stderr, "data file wrong: has %d bytes, expected %d bytes\n", nread, 11);
return 1;
}
if (fclose (fp))
{
perror ("cannot close data file");
return 1;
}
}
#endif
/* Clean up data file. */
unlink (DATA_FILENAME);
return 0;
}
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