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/*
* Copyright 1996-2002 - Karl R. Hakimian and David Fries
*
* This file is part of datalink.
*
* Datalink is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Datalink is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with datalink (see COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*
* Linux version of Timex/Microsoft SDK for Timex datalink watches making use
* of the svga library to select a graphic mode and draw on it.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/fcntl.h>
#include <signal.h>
#include <sched.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "datalink.h"
static void maxPriority();
int main(int argc, char **argv)
{
int oldvt;
unsigned char **data;
char buf[256];
int fd;
unsigned char size;
int n;
int p = 0;
int type = DATALINK_IRONMAN;
/* Drop down to user privileges until we need root privs. */
seteuid(getuid());
while (argc > 1 && *argv[1] == '-')
{
if (strcmp(argv[1], "-ironman") == 0
|| strcmp(argv[1], "-modelironman") == 0)
type = DATALINK_IRONMAN;
else
if (strcmp(argv[1], "-150") == 0
|| strcmp(argv[1], "-model150") == 0)
type = DATALINK_150;
else
if (strcmp(argv[1], "-150s") == 0
|| strcmp(argv[1], "-model150s") == 0)
type = DATALINK_150S;
else
if (strcmp(argv[1], "-70") == 0
|| strcmp(argv[1], "-model70") == 0)
type = DATALINK_70;
else
{
fprintf(stderr, "Unknown option %s.\n", argv[1]);
fprintf(stderr, "Usage: %s [ -ironman | -modelironman | -150 | -model150 | -150s | \n"
"\t-model150s | -70 | -model70 ] datafile\n"
"Version $Id: svgablink.c,v 1.12 2002/07/10 04:27:08 david Exp $\n", argv[0]);
exit(-1);
}
argc--;
argv++;
}
if (argc != 2)
{
fprintf(stderr, "Usage: %s data_file\n", argv[0]);
exit(-1);
}
if ((data = (unsigned char **) calloc(sizeof(unsigned char *),
1024)) == NULL)
{
fprintf(stderr, "Could not allocate data array.\n");
exit(-1);
}
/* Open data file */
if ((fd = open(argv[1], O_RDONLY)) < 0)
{
fprintf(stderr, "Could not open %s for reading.\n",
argv[1]);
exit(-1);
}
/* Read in packets. */
while ((n = read(fd, &size, 1)) == 1)
{
size--;
if ((n = read(fd, buf, size)) != size)
break;
size++;
if ((data[p] = (char *) malloc(size)) == NULL)
{
fprintf(stderr,
"Could not allocate data buffer.\n");
exit(-1);
}
*data[p] = size;
memcpy(&data[p++][1], buf, size - 1);
};
if (n != 0)
{
fprintf(stderr, "File error reading from %s\n", argv[1]);
fprintf(stderr, "%d, %d, %d\n", n, size, p);
exit(-1);
}
/* We need to detach from the terminal and our parent may need to wait for us
time to fork a child. */
switch (fork())
{
case 0:
break;
case -1:
perror("fork");
exit(-1);
default:
exit(0);
}
/* The rest of this needs to be as root, open_vt, will raise privileges */
if ((oldvt = open_vt()) == -1)
exit(-1);
maxPriority();
send_data(type, data, p);
close_vt(oldvt);
return 0;
}
static void maxPriority()
{
struct sched_param scp;
memset(&scp, '\0', sizeof(scp));
scp.sched_priority = sched_get_priority_max(SCHED_RR);
if (sched_setscheduler(0, SCHED_RR, &scp) < 0)
fprintf(stderr, "WARNING: Cannot set RR-scheduler.\n");
if (mlockall(MCL_CURRENT | MCL_FUTURE) < 0)
fprintf(stderr, "WARNING: Cannot disable paging.\n");
}
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