add the good old ledlink.c
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Kalle Carlbark
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bea842044c
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393a5fd73f
1 changed files with 301 additions and 0 deletions
301
ledblink.c
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301
ledblink.c
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/*
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* Copyright (c) 2002, Kalle Carlbark
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the
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* do *censored* entation and/or other materials provided with the
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* distribution.
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* 3. You may not under any circumstances change this license to GPL or dual
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* license code released under to rootbsd license as gpl.
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* 4. Neither the name of the RootBSD nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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* 5. Vendors for any derivated commercial software based on code licensed by
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* the rootbsd license must provide the original programmers with a symbolic
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* amount of money to show their appreciation to the original programmers
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* and/or contributors work.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* This program fork()'s itself into the background and checks for
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* new mail by using stat() to check when the mailfile is being changed.
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* When new mail arrives this program calls ioctl() with the
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* KDSETLED request which'll be switching the capslock led on and off
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* making it blink.
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* For FreeBSD 4.x and FreeBSD -CURRENT, probably 3.x as well.
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*
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* Author: kc@RootBSD.net
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*
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* Greets goes to skypher.
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*
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* $Id: ledblink.c,v 1.5 2002/10/03 20:49:20 kc Exp $
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*
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*/
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#include <sys/kbio.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/capsicum.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <utime.h>
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#include <string.h>
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#include <errno.h>
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#include <sysexits.h>
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#include <signal.h>
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#include <time.h>
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#include <err.h>
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#define DURATION 250000
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#define OFF 0
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#define ON 1
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#define CONSOLE 0
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#define X 1
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static void usage __P((void));
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static int daemon_init __P((void));
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static int blink __P((int, int));
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static int checkmail __P((char *));
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static int checkttys __P((int));
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static void getsig __P((int));
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extern char *__progname;
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struct stat statbuf;
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char *ttys[] = {
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"/dev/ttyv0",
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"/dev/ttyv1",
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"/dev/ttyv2",
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"/dev/ttyv3",
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"/dev/ttyv4",
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"/dev/ttyv5",
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"/dev/ttyv6",
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"/dev/ttyv7",
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NULL,
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};
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char *xtty = "/dev/ttyv8";
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int fd[9];
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int
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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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int ch, file, gotmail = 0, ttys, state = NULL;
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char *mailfile;
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if ((mailfile = getenv("MAIL")) == NULL)
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bzero(mailfile, sizeof(mailfile));
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while ((ch = getopt(argc, argv, "cf:ht:x")) != -1)
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switch (ch) {
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case 'c':
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state = CONSOLE;
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break;
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case 'f':
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mailfile = optarg;
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if ((file = open(mailfile, O_RDONLY)) == -1) {
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fprintf(stderr, "%s: %s: %s\n", __progname, mailfile, strerror(errno));
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exit(1);
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}
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break;
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case 'h':
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usage();
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break;
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case 't':
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xtty = optarg;
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break;
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case 'x':
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setuid(getuid());
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if (getuid() != 0) {
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fprintf(stderr, "The -x flag need to be run as root\n");
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exit(1);
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}
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state = X;
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break;
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (optind < 2)
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usage();
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signal(SIGINT, getsig);
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signal(SIGTERM, getsig);
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if (daemon_init() != NULL)
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exit(1);
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if ((ttys = checkttys(state)) == -1) {
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fprintf(stderr, "%s: No valid tty's\n", __progname);
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exit(EX_NOINPUT);
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}
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cap_enter();
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for (;;) {
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if ((checkmail(mailfile)) > 0) {
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gotmail = 1;
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}
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else
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gotmail = 0;
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if (gotmail == 1) {
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blink(ON, ttys);
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blink(OFF, ttys);
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}
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usleep(50000);
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}
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return(0); /* NOTREACHED */
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}
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static int
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blink(OnOFF, ttys)
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int OnOFF;
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int ttys;
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{
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int i;
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if (ttys == NULL) {
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if (ioctl(fd[0], KDSETLED, OnOFF) == -1) {
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warnx("%s", strerror(errno));
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exit(1);
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}
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} else {
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for(i=0;i<ttys;i++) {
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if (ioctl(fd[i], KDSETLED, OnOFF) == -1) {
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warnx("%s", strerror(errno));
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exit(1);
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}
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}
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}
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usleep(DURATION);
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return(0);
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}
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static int
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checkmail(mailfile)
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char *mailfile;
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{
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if (mailfile == NULL) {
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fprintf(stderr, "No mailfile to check\n");
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exit(EX_NOINPUT);
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}
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if (stat(mailfile, &statbuf) == -1) {
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fprintf(stderr, "%s: %s: %s\n", __progname, mailfile, strerror(errno));
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exit(EX_DATAERR);
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}
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if (statbuf.st_atime < statbuf.st_mtime)
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return(statbuf.st_mtime);
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return(0);
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}
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static void
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usage()
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{
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printf("Options:\n");
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printf("-c\t\t\tBlink in Console.\n");
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printf("-f mailfile\t\tUse mailfile instead of $MAIL.\n");
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printf("-t <tty X is using>\tUse another tty than the default /dev/ttyv8\n");
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printf("-x\t\t\tBlink in X (require to be run as root).\n\n");
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fprintf(stderr, "Usage: %s [-xc] [-f mailfile] [-t /dev/tty*]\n", __progname);
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exit(EX_USAGE);
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}
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static int
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checkttys(state)
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int state;
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{
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int working = 0;
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int i = 0;
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int c = 1;
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/* XXX: X may use another tty. */
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if (state == X) {
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close(fd[0]);
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if ((fd[0] = open(xtty, O_RDONLY)) == -1) {
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warnx("%s", strerror(errno));
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exit(EX_DATAERR);
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}
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return(NULL);
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}
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while (ttys[i] != NULL) {
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if ((fd[c] = open(ttys[i], O_RDONLY)) != -1) {
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working += 1;
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}
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i++;
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c++;
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}
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if (working == 0) {
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fprintf(stderr, "%s: No valid tty's\n", __progname);
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return(-1);
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}
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return(working);
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}
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static void
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getsig(signo)
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int signo;
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{
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exit(1);
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}
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/* Own version of daemon() :-) */
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static int
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daemon_init()
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{
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pid_t pid;
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if ((pid = fork()) < 0) {
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warnx("%s", strerror(errno));
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exit(EX_UNAVAILABLE);
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} else if (pid != 0)
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exit(EX_OK);
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setsid();
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chdir("/");
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umask(0);
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sysconf(_SC_OPEN_MAX);
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return(0);
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}
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