/*-
 * Copyright (c) 1992 Christopher G. Demetriou
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sbin/comcontrol/comcontrol.c,v 1.8.2.2 2001/08/01 06:01:51 obrien Exp $
 * $DragonFly: src/sbin/comcontrol/comcontrol.c,v 1.3 2005/03/20 14:07:43 liamfoy Exp $
 */

#include <sys/types.h>
#include <sys/ioctl.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static void
usage(void)
{
        fprintf(stderr,
        "usage: comcontrol <filename> [dtrwait <n>] [drainwait <n>]\n");
        exit(1);
}

int
main(int argc, char *argv[])
{
        int fd;
        int res = 0;
        int print_dtrwait = 1, print_drainwait = 1;
        int dtrwait = -1, drainwait = -1;

        if (argc < 2)
                usage();

        if (strcmp(argv[1], "-") == 0) {
                fd = STDIN_FILENO;
        } else {
                fd = open(argv[1], O_RDONLY | O_NONBLOCK, 0);
                if (fd < 0) {
                        warn("couldn't open file %s", argv[1]);
                        return 1;
                }
        }
        if (argc == 2) {
                if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
                        print_dtrwait = 0;
                        if (errno != ENOTTY) {
                                res = 1;
                                warn("TIOCMGDTRWAIT");
                        }
                }
                if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
                        print_drainwait = 0;
                        if (errno != ENOTTY) {
                                res = 1;
                                warn("TIOCGDRAINWAIT");
                        }
                }
                if (print_dtrwait)
                        printf("dtrwait %d ", dtrwait);
                if (print_drainwait)
                        printf("drainwait %d ", drainwait);
                printf("\n");
        } else {
                while (argv[2] != NULL) {
                        if (strcmp(argv[2],"dtrwait") == 0) {
                                if (dtrwait >= 0)
                                        usage();
                                if (argv[3] == NULL || !isdigit(argv[3][0]))
                                        usage();
                                dtrwait = atoi(argv[3]);
                                argv += 2;
                        } else if (strcmp(argv[2],"drainwait") == 0) {
                                if (drainwait >= 0)
                                        usage();
                                if (argv[3] == NULL || !isdigit(argv[3][0]))
                                        usage();
                                drainwait = atoi(argv[3]);
                                argv += 2;
                        } else {
                                usage();
                        }
                }
                if (dtrwait >= 0) {
                        if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
                                res = 1;
                                warn("TIOCMSDTRWAIT");
                        }
                }
                if (drainwait >= 0) {
                        if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
                                res = 1;
                                warn("TIOCSDRAINWAIT");
                        }
                }
        }

        close(fd);
        return res;
}