130 lines
2.4 KiB
C
130 lines
2.4 KiB
C
#ifndef lint
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static char sccsid[] = "@(#)ttysoftcar.c 1.1 94/10/31";
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#endif
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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#include <stdio.h>
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#include <strings.h>
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#include <ttyent.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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char *cmdname;
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enum opt { OFF, ON, PRINT };
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enum verbose { QUIET, VERBOSE };
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main(argc, argv)
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int argc;
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char **argv;
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{
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register int c, i;
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enum opt opt = PRINT;
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extern int optind;
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extern char *optarg;
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cmdname = rindex(argv[0], '/');
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if (cmdname)
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cmdname++;
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else
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cmdname = argv[0];
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while ((c = getopt(argc, argv, "yna")) != EOF)
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switch (c) {
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case 'y':
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opt = ON;
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break;
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case 'n':
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opt = OFF;
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break;
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case 'a':
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if (argv[optind] != NULL)
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fprintf(stderr,
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"%s: ignoring extra arguments after -a\n",
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cmdname);
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setall();
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exit(0);
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default:
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fprintf(stderr,
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"usage: %s [-y] [-n] tty ...\n\t%s -a\n",
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cmdname, cmdname);
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exit(1);
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}
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for (i = optind; i < argc; i++)
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dotty(argv[i], opt, VERBOSE);
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exit(0);
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/* NOTREACHED */
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}
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setall()
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{
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register struct ttyent *ty;
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/*
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* Set up each tty mentioned in /etc/ttytab, but don't
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* complain if the device entry doesn't exist or the
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* device can't be opened, since we often have entries
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* in ttytab and/or /dev for devices that don't exist
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* on a particular machine.
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*/
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while ((ty = getttyent()) != NULL) {
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if (ty->ty_status & TTY_LOCAL)
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dotty(ty->ty_name, ON, QUIET);
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else
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dotty(ty->ty_name, OFF, QUIET);
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}
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}
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dotty(name, opt, verbose)
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char *name;
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enum opt opt;
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enum verbose verbose;
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{
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char tty[100];
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int fd, val;
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char **pre;
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static int on = 1, off = 0;
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static char *prelist[] = { "", "/dev/", "/dev/tty", NULL };
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for (pre = prelist; *pre; pre++) {
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strcpy(tty, *pre);
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strcat(tty, name);
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if ((fd = open(tty, O_RDONLY|O_NDELAY)) < 0) {
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if (errno == ENOENT)
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continue;
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if ((errno != ENODEV && errno != ENXIO) ||
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verbose == VERBOSE) {
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fprintf(stderr, "%s: ", cmdname);
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perror(tty);
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}
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return;
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} else
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goto ok;
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}
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if (verbose == VERBOSE)
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fprintf(stderr, "%s: %s: no such device\n", cmdname, name);
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return;
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ok:
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switch (opt) {
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case ON:
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(void) ioctl(fd, TIOCSSOFTCAR, &on);
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break;
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case OFF:
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(void) ioctl(fd, TIOCSSOFTCAR, &off);
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break;
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case PRINT:
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if (ioctl(fd, TIOCGSOFTCAR, &val) < 0) {
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fprintf(stderr, "%s: ", cmdname);
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perror(tty);
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} else
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printf("%s is %c\n", name, val ? 'y' : 'n');
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}
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close(fd);
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}
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