From fd6bb20116127f6ac903d4b03abac72a49baa1ae Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Sat, 27 Apr 2019 22:20:21 +0100
Subject: fish

---
 svgablink.c | 171 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 svgablink.c

(limited to 'svgablink.c')

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");
+
+}
-- 
cgit v1.2.3