diff options
Diffstat (limited to 'svgablink.c')
| -rw-r--r-- | svgablink.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/svgablink.c b/svgablink.c new file mode 100644 index 0000000..185a2ca --- /dev/null +++ b/svgablink.c @@ -0,0 +1,171 @@ +/* + * 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"); + +} |