usr/src/bin/stty/stty.c

/*-
 * Copyright (c) 1989, 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1991, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)stty.c      8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.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>

#include "stty.h"
#include "extern.h"

int
main(argc, argv)
        int argc;
        char *argv[];
{
        struct info i;
        enum FMT fmt;
        int ch;

        fmt = NOTSET;
        i.fd = STDIN_FILENO;

        opterr = 0;
        while (optind < argc &&
            strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
            (ch = getopt(argc, argv, "aef:g")) != EOF)
                switch(ch) {
                case 'a':               /* undocumented: POSIX compatibility */
                        fmt = POSIX;
                        break;
                case 'e':
                        fmt = BSD;
                        break;
                case 'f':
                        if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
                                err(1, "%s", optarg);
                        break;
                case 'g':
                        fmt = GFLAG;
                        break;
                case '?':
                default:
                        goto args;
                }

args:   argc -= optind;
        argv += optind;

        if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
                err(1, "TIOCGETD");
        if (tcgetattr(i.fd, &i.t) < 0)
                err(1, "tcgetattr");
        if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
                warn("TIOCGWINSZ: %s\n", strerror(errno));

        checkredirect();                        /* conversion aid */

        switch(fmt) {
        case NOTSET:
                if (*argv)
                        break;
                /* FALLTHROUGH */
        case BSD:
        case POSIX:
                print(&i.t, &i.win, i.ldisc, fmt);
                break;
        case GFLAG:
                gprint(&i.t, &i.win, i.ldisc);
                break;
        }

        for (i.set = i.wset = 0; *argv; ++argv) {
                if (ksearch(&argv, &i))
                        continue;

                if (csearch(&argv, &i))
                        continue;

                if (msearch(&argv, &i))
                        continue;

                if (isdigit(**argv)) {
                        int speed;

                        speed = atoi(*argv);
                        cfsetospeed(&i.t, speed);
                        cfsetispeed(&i.t, speed);
                        i.set = 1;
                        continue;
                }

                if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
                        gread(&i.t, *argv + sizeof("gfmt1") - 1);
                        continue;
                }

                warnx("illegal option -- %s", *argv);
                usage();
        }

        if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
                err(1, "tcsetattr");
        if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
                warn("TIOCSWINSZ");
        exit(0);
}

void
usage()
{
        (void)fprintf(stderr,
            "usage: stty: [-a|-e|-g] [-f file] [options]\n");
        exit (1);
}