/*
 * Copyright (c) 2026 Mark Johnston <markj@FreeBSD.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

/*
 * A minimal regression test for FreeBSD-SA-26:13.exec.
 */

#include <err.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define SCRIPTNAME      "script"
#define SCRIPTBODY      "#!/bin/sh\nexit 0\n"

int
main(void)
{
        char *argv;
        size_t size;
        int fd;

        fd = open(SCRIPTNAME, O_WRONLY | O_CREAT | O_TRUNC, 0700);
        if (fd == -1)
                err(1, "open");
        if (write(fd, SCRIPTBODY, sizeof(SCRIPTBODY) - 1) !=
            sizeof(SCRIPTBODY) - 1)
                err(1, "write");
        close(fd);

        size = ARG_MAX / 2;
        argv = malloc(size);
        if (argv == NULL)
                err(1, "malloc");
        memset(argv, 'a', size - 1);
        argv[size - 1] = '\0';

        execve(SCRIPTNAME, (char *[]){ argv, NULL }, (char *[]){ NULL });

        exit(1);
}