Fix bugs in logger and syslogd. Add fbset.

 -Erik

1 files changed, 289 insertions, 0 deletions

diff --git a/fbset.c b/fbset.c
new file mode 100644
index 0000000..3f7e455
--- /dev/null
+++ b/fbset.c
@@ -0,0 +1,289 @@
+/*
+ * Mini fbset implementation for busybox
+ *
+ * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This is a from-scratch implementation of fbset; but the de facto fbset
+ * implementation was a good reference. fbset (original) is released under
+ * the GPL, and is (c) 1995-1999 by: 
+ *     Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
+ */
+
+#include "internal.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+
+#define PERROR(ctx)   do { perror(ctx); exit(1); } while(0)
+
+#define DEFAULTFBDEV  "/dev/fb0"
+#define DEFAULTFBMODE "/etc/fb.modes"
+
+#define OPT_CHANGE    1
+#define OPT_INFO      (1 << 1)
+#define OPT_READMODE  (1 << 2)
+
+#define CMD_HELP        0
+#define CMD_FB		1	
+#define CMD_DB		2
+#define CMD_GEOMETRY	3
+#define CMD_TIMING	4
+#define CMD_ACCEL	5
+#define CMD_HSYNC	6
+#define CMD_VSYNC	7
+#define CMD_LACED	8
+#define CMD_DOUBLE	9
+/* #define CMD_XCOMPAT     10 */
+#define CMD_ALL         11
+#define CMD_INFO        12
+
+#ifdef BB_FBSET_FANCY
+#define CMD_XRES	13
+#define CMD_YRES	14
+#define CMD_VXRES	15
+#define CMD_VYRES	16
+#define CMD_DEPTH	17
+#define CMD_MATCH	18
+#define CMD_PIXCLOCK	19
+#define CMD_LEFT	20
+#define CMD_RIGHT	21
+#define CMD_UPPER	22
+#define CMD_LOWER	23
+#define CMD_HSLEN	24
+#define CMD_VSLEN	25
+#define CMD_CSYNC	26
+#define CMD_GSYNC	27
+#define CMD_EXTSYNC	28
+#define CMD_BCAST	29
+#define CMD_RGBA	30
+#define CMD_STEP	31
+#define CMD_MOVE	32
+#endif
+
+static unsigned int g_options = 0;
+
+struct cmdoptions_t {
+  char *name;
+  unsigned char param_count;
+  unsigned char code;
+} g_cmdoptions[] = {
+  { "-h",       0, CMD_HELP },
+  { "-fb",	1, CMD_FB },
+  { "-db",	1, CMD_DB },
+  { "-a",	0, CMD_ALL },
+  { "-i",	0, CMD_INFO },
+  { "-g",       5, CMD_GEOMETRY },
+  { "-t",       7, CMD_TIMING },
+  { "-accel",	1, CMD_ACCEL },
+  { "-hsync",	1, CMD_HSYNC },
+  { "-vsync",	1, CMD_VSYNC },
+  { "-laced",	1, CMD_LACED },
+  { "-double",	1, CMD_DOUBLE },
+  
+#ifdef BB_FBSET_FANCY
+  { "--help",	0, CMD_HELP },
+  { "-all",	0, CMD_ALL },
+  { "-xres",	1, CMD_XRES },
+  { "-yres",	1, CMD_YRES },
+  { "-vxres",   1, CMD_VXRES },
+  { "-vyres",   1, CMD_VYRES },
+  { "-depth",   1, CMD_DEPTH },
+  { "-match",   0, CMD_MATCH },
+  { "--geometry", 5, CMD_GEOMETRY },
+  
+  { "-pixclock", 1, CMD_PIXCLOCK },
+  { "-left",	1, CMD_LEFT },
+  { "-right",	1, CMD_RIGHT },
+  { "-upper",	1, CMD_UPPER },
+  { "-lower",	1, CMD_LOWER },
+  { "-hslen",	1, CMD_HSLEN },
+  { "-vslen",	1, CMD_VSLEN },
+  { "--timings", 7, CMD_TIMING },
+  
+  { "-csync",	1, CMD_CSYNC },
+  { "-gsync",	1, CMD_GSYNC },
+  { "-extsync", 1, CMD_EXTSYNC },
+  { "-bcast",	1, CMD_BCAST },
+  { "-rgba",	1, CMD_RGBA },
+  { "-step",	1, CMD_STEP },
+  { "-move", 	1, CMD_MOVE },
+#endif
+  { 0, 0, 0 }
+};
+
+static int readmode(struct fb_var_screeninfo *base, const char *fn,
+		     const char *mode)
+{
+#ifdef BB_FBSET_READMODE
+    FILE *f;
+    char buf[256];
+    char *p = buf;
+    
+    if ((f = fopen(fn, "r")) == NULL) PERROR("readmode(fopen)");
+    while (!feof(f)) {
+	fgets(buf, sizeof(buf), f);
+	if ((p = strstr(buf, "mode ")) || (p = strstr(buf, "mode\t"))) {
+	    p += 5;
+            if ((p = strstr(buf, mode))) {
+	        p += strlen(mode);
+		if (!isspace(*p) && (*p != 0) && (*p != '"') && (*p != '\r')
+		    && (*p != '\n')) continue; /* almost, but not quite */
+		while (!feof(f)) {
+		    fgets(buf, sizeof(buf), f);
+		    if (!strstr(buf, "endmode")) return 1;
+		}
+	    }
+	}
+    }
+#else
+    fprintf(stderr, "W: mode reading was disabled on this copy of fbset; ignoring request\n");
+#endif
+    return 0;
+}
+
+static void setmode(struct fb_var_screeninfo *base, 
+		    struct fb_var_screeninfo *set)
+{
+  if ((int)set->xres > 0) base->xres = set->xres;
+  if ((int)set->yres > 0) base->yres = set->yres;
+  if ((int)set->xres_virtual > 0) base->xres_virtual = set->xres_virtual;
+  if ((int)set->yres_virtual > 0) base->yres_virtual = set->yres_virtual;
+  if ((int)set->bits_per_pixel > 0) base->bits_per_pixel = set->bits_per_pixel;
+}
+
+static void showmode(struct fb_var_screeninfo *v)
+{
+    double drate = 0, hrate = 0, vrate = 0;
+    if (v->pixclock) {
+        drate = 1e12 / v->pixclock;
+	hrate = drate / (v->left_margin+v->xres+v->right_margin+v->hsync_len);
+	vrate = hrate / (v->upper_margin+v->yres+v->lower_margin+v->vsync_len);
+    }
+    printf("\nmode \"%ux%u-%u\"\n", v->xres, v->yres, (int)(vrate+0.5));
+#ifdef BB_FBSET_FANCY
+    printf("\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n", drate/1e6, hrate/1e3, 
+	   vrate);
+#endif
+    printf("\tgeometry %u %u %u %u %u\n", v->xres, v->yres, 
+           v->xres_virtual, v->yres_virtual, v->bits_per_pixel);
+    printf("\ttimings %u %u %u %u %u %u %u\n", v->pixclock, v->left_margin, 
+           v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len,
+  	   v->vsync_len);
+    printf("\taccel %s\n", (v->accel_flags > 0 ? "true" : "false"));
+    printf("\trgba %u/%u,%u/%u,%u/%u,%u/%u\n", v->red.length, v->red.offset,
+           v->green.length, v->green.offset, v->blue.length, v->blue.offset,
+	   v->transp.length, v->transp.offset);
+    printf("endmode\n");
+}
+
+static void fbset_usage(void)
+{
+    int i;
+#ifndef STANDALONE
+    fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
+#endif
+    fprintf(stderr, "Usage: fbset [options] [mode]\n");
+    fprintf(stderr, "\tThe following options are recognized:\n");
+    for (i = 0; g_cmdoptions[i].name; i++)
+        fprintf(stderr, "\t\t%s\n", g_cmdoptions[i].name);
+    exit(-1);
+}
+
+#ifdef STANDALONE
+int main(int argc, char **argv)
+#else 
+extern int fbset_main(int argc, char **argv)
+#endif
+{
+    struct fb_var_screeninfo var, varset;
+    struct fb_fix_screeninfo fix;
+    int fh, i;    
+    char *fbdev = DEFAULTFBDEV;
+    char *modefile = DEFAULTFBMODE;
+    char *thisarg, *mode = NULL;
+
+    memset(&varset, 0xFF, sizeof(varset));
+    
+    /* parse cmd args.... why do they have to make things so difficult? */
+    argv++; argc--;
+    for (; argc > 0 && (thisarg = *argv); argc--, argv++) {
+        for (i = 0; g_cmdoptions[i].name; i++) {
+	    if (!strcmp(thisarg, g_cmdoptions[i].name)) {
+	        if (argc - 1 < g_cmdoptions[i].param_count) fbset_usage();
+		switch (g_cmdoptions[i].code) {
+		    case CMD_HELP: fbset_usage();
+		    case CMD_FB: fbdev = argv[1]; break;
+		    case CMD_DB: modefile = argv[1]; break;
+		    case CMD_GEOMETRY:
+		        varset.xres = strtoul(argv[1],0,0);
+			varset.yres = strtoul(argv[2],0,0);
+			varset.xres_virtual = strtoul(argv[3],0,0);
+			varset.yres_virtual = strtoul(argv[4],0,0);
+			varset.bits_per_pixel = strtoul(argv[5],0,0);
+			break;
+		    case CMD_TIMING:
+			varset.pixclock = strtoul(argv[1],0,0);
+			varset.left_margin = strtoul(argv[2],0,0);
+			varset.right_margin = strtoul(argv[3],0,0);
+			varset.upper_margin = strtoul(argv[4],0,0);
+			varset.lower_margin = strtoul(argv[5],0,0);
+                        varset.hsync_len = strtoul(argv[6],0,0);
+			varset.vsync_len = strtoul(argv[7],0,0);
+			break;
+#ifdef BB_FBSET_FANCY
+		    case CMD_XRES: varset.xres = strtoul(argv[1],0,0); break;
+		    case CMD_YRES: varset.yres = strtoul(argv[1],0,0); break;
+#endif
+		}
+		argc -= g_cmdoptions[i].param_count;
+		argv += g_cmdoptions[i].param_count;
+		break;
+	    }
+	}
+	if (!g_cmdoptions[i].name) {
+            if (argc == 1) {
+                mode = *argv; 
+		g_options |= OPT_READMODE;
+            } else {
+	        fbset_usage();
+	    }
+	}
+    }
+
+    if ((fh = open(fbdev, O_RDONLY)) < 0) PERROR("fbset(open)");
+    if (ioctl(fh, FBIOGET_VSCREENINFO, &var)) PERROR("fbset(ioctl)");
+    if (g_options & OPT_READMODE) {
+        if (!readmode(&var, modefile, mode)) {
+            fprintf(stderr, "Unknown video mode `%s'\n", mode);
+	    exit(1);
+	}
+    }
+
+    setmode(&var, &varset);
+    if (g_options & OPT_CHANGE)
+        if (ioctl(fh, FBIOPUT_VSCREENINFO, &var)) PERROR("fbset(ioctl)");
+    showmode(&var);
+    close(fh);
+    
+    return(TRUE);
+}
+