/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2019, Joyent, Inc.
 */

/*
 * Verify that if a child grabs an exclusive lock and calls exit, we can grab it
 * again.
 */

#include <err.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <strings.h>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>

#include <sys/usb/clients/ccid/uccid.h>

int
main(int argc, char *argv[])
{
        int fd, estat;
        pid_t pid;
        uccid_cmd_txn_begin_t begin;

        if (argc != 2) {
                errx(EXIT_FAILURE, "missing required ccid path");
        }

        bzero(&begin, sizeof (begin));
        begin.uct_version = UCCID_CURRENT_VERSION;

        pid = fork();
        if (pid == 0) {
                fd = open(argv[1], O_RDWR);
                if (fd < 0) {
                        err(EXIT_FAILURE, "failed to open %s", argv[1]);
                }

                if (ioctl(fd, UCCID_CMD_TXN_BEGIN, &begin) != 0) {
                        err(EXIT_FAILURE, "failed to issue begin ioctl");
                }

                _exit(0);
        }

        estat = -1;
        if (waitpid(pid, &estat, 0) == -1) {
                err(EXIT_FAILURE, "failed to wait for pid %" _PRIdID, pid);
        }

        if (estat != 0) {
                errx(EXIT_FAILURE, "child exited with non-zero value (%d)",
                    estat);
        }

        fd = open(argv[1], O_RDWR);
        if (fd < 0) {
                err(EXIT_FAILURE, "failed to open %s", argv[1]);
        }

        if (ioctl(fd, UCCID_CMD_TXN_BEGIN, &begin) != 0) {
                err(EXIT_FAILURE, "failed to issue begin ioctl");
        }

        return (0);
}