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/* $NetBSD: autocue.c,v 1.2 2006/01/29 00:11:15 agc Exp $ */
/*
* Copyright © 2006 Alistair Crooks. 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 prior 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright © 2006 \
The NetBSD Foundation, Inc. All rights reserved.");
__RCSID("$NetBSD: autocue.c,v 1.2 2006/01/29 00:11:15 agc Exp $");
#endif
#include <err.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* symbolic constants */
enum {
MaxCutBuffers = 4,
FmtGoal = 50,
FmtMax = 55,
SlowDenom = 3,
MediumDenom = 7,
FastDenom = 12
};
static int speed;
/* send process a USR1 to make the display go faster */
static void
sigusr1(int s)
{
printf("moving from speed %d to %d (faster)\n", speed, speed + 1);
speed += 1;
}
/* send process a USR2 to make the display go slower */
static void
sigusr2(int s)
{
printf("moving from speed %d to %d (slower)\n", speed, speed - 1);
speed -= 1;
}
/* show the contents of the buffer `buf', which is `cc' chars long */
/* maxcut is the number of xcb cut buffers you have displayed */
/* speed is a numeric value for the number of seconds denominator */
static void
showbuffer(char *buf, int cc, int maxcut)
{
static int cut;
char cmd[BUFSIZ * 20];
FILE *pp;
int s;
(void) snprintf(cmd, sizeof(cmd), "fmt %d %d | xcb -s %d", FmtGoal, FmtMax, cut);
if ((pp = popen(cmd, "w")) == NULL) {
errx(EXIT_FAILURE, "can't open pipe to xcb");
}
buf[cc] = 0x0;
(void) fprintf(pp, "%s - \n", buf);
(void) pclose(pp);
s = cc / speed;
printf("%.20s...\nBuffer contents are in cut buffer %d, sleeping %d secs\a\n", buf, cut, s);
while ((s = sleep(s)) > 0) {
}
cut = (cut + 1) % maxcut;
}
int
main(int argc, char **argv)
{
char buf[BUFSIZ * 20];
char line[BUFSIZ];
FILE *fp;
int maxcut;
int cc;
int c;
int i;
maxcut = MaxCutBuffers;
speed = SlowDenom;
signal(SIGUSR1, sigusr1);
signal(SIGUSR2, sigusr2);
while ((i = getopt(argc, argv, "S:c:s:")) != -1) {
switch(i) {
case 'S':
speed = atoi(optarg);
break;
case 'c':
maxcut = atoi(optarg);
break;
case 's':
if (strcmp(optarg, "slow") == 0) {
speed = SlowDenom;
} else if (strcmp(optarg, "medium") == 0) {
speed = MediumDenom;
} else if (strcmp(optarg, "fast") == 0) {
speed = FastDenom;
}
break;
}
}
if (argc - optind < 1) {
errx(EXIT_FAILURE, "Usage: %s [-S numeric-speed] [-c max cut buffers] [-s speed] file", *argv);
}
if (speed == 0) {
err(EXIT_FAILURE, "Speed cannot be '0'");
}
if (maxcut == 0) {
err(EXIT_FAILURE, "Maximum cut buffers cannot be '0'");
}
if ((fp = fopen(argv[optind], "r")) == NULL) {
errx(EXIT_FAILURE, "can't open `%s'", argv[optind]);
}
printf("send this process - %d - a USR1 to make the display go faster, a USR2 to make it go slower\n", getpid());
for (cc = 0 ; fgets(line, sizeof(line), fp) != NULL ; ) {
if (line[0] == '\n') {
showbuffer(buf, cc, maxcut);
cc = 0;
continue;
}
c = strlen(line);
(void) memcpy(&buf[cc], line, c);
cc += c;
}
exit(EXIT_SUCCESS);
}
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