Fix bugs in logger and syslogd. Add fbset.

 -Erik

12 files changed, 600 insertions, 14 deletions

diff --git a/Changelog b/Changelog
index 9ccc21160..da2346ae7 100644
--- a/Changelog
+++ b/Changelog
@@ -2,6 +2,9 @@
         * Added the -s option to du -beppu
         * Fixed an embarrasing segfault in head -beppu
         * New App: lsmod -erik
+        * New Apps: fbset contributed by Randolph Chung <tausq@debian.org>.
+        * Fixed an bug in syslogd causing it to stop logging after 20 minutes. -erik
+        * Fixed the embarrasing failure of the -p opition in the logger app. -erik
 
         -Erik Andersen
 
diff --git a/TODO b/TODO
index 73660e950..6c0471ed2 100644
--- a/TODO
+++ b/TODO
@@ -3,6 +3,9 @@ is listed here doesn't mean that it is going to be added to busybox,
 or that doing so is even a good idea. It just means that I _might_ get
 around to it some time. If you have any good ideas, please let me know.
 
+* login/sulogin/passwd/getty/etc are part of tinylogin, and so are not
+    needed or wanted in busybox (or else I'd have to link in libcrypt).
+
  -Erik
 
 -----------
@@ -22,6 +25,4 @@ around to it some time. If you have any good ideas, please let me know.
 * wc
 * tr
 * expr (maybe?)  (ash builtin?)
-* login/sulogin/passwd/getty  (These are actully now part of tinylogin, which 
-                                I've just started to maintain).
 
diff --git a/applets/busybox.c b/applets/busybox.c
index 4967e5fa3..ed5a2b0d4 100644
--- a/applets/busybox.c
+++ b/applets/busybox.c
@@ -51,6 +51,9 @@ static const struct Applet applets[] = {
 #ifdef BB_DUTMP                 //usr/sbin
     {"dutmp", dutmp_main},
 #endif
+#ifdef BB_FBSET                 //usr/sbin
+    {"fbset", fbset_main},
+#endif
 #ifdef BB_FDFLUSH               //bin
     {"fdflush", fdflush_main},
 #endif
diff --git a/busybox.c b/busybox.c
index 4967e5fa3..ed5a2b0d4 100644
--- a/busybox.c
+++ b/busybox.c
@@ -51,6 +51,9 @@ static const struct Applet applets[] = {
 #ifdef BB_DUTMP                 //usr/sbin
     {"dutmp", dutmp_main},
 #endif
+#ifdef BB_FBSET                 //usr/sbin
+    {"fbset", fbset_main},
+#endif
 #ifdef BB_FDFLUSH               //bin
     {"fdflush", fdflush_main},
 #endif
diff --git a/busybox.def.h b/busybox.def.h
index fcd185aa7..834738ea2 100644
--- a/busybox.def.h
+++ b/busybox.def.h
@@ -15,6 +15,7 @@
 #define BB_DMESG
 //#define BB_DUTMP
 #define BB_DU
+#define BB_FBSET
 //#define BB_FDFLUSH
 #define BB_FIND
 #define BB_FREE
diff --git a/fbset.c b/fbset.c
new file mode 100644
index 000000000..3f7e4552a
--- /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);
+}
+
diff --git a/internal.h b/internal.h
index 371728dd7..3e9c272f0 100644
--- a/internal.h
+++ b/internal.h
@@ -68,6 +68,7 @@ extern int dmesg_main(int argc, char** argv);
 extern int du_main(int argc, char** argv);
 extern int dutmp_main(int argc, char** argv);
 extern int false_main(int argc, char** argv);
+extern int fbset_main(int argc, char** argv);
 extern int fdisk_main(int argc, char** argv);
 extern int fdflush_main(int argc, char **argv);
 extern int fsck_minix_main(int argc, char **argv);
diff --git a/logger.c b/logger.c
index dfbc557ec..5ef622dc3 100644
--- a/logger.c
+++ b/logger.c
@@ -120,6 +120,7 @@ extern int logger_main(int argc, char **argv)
     int fd, pri = LOG_USER|LOG_NOTICE;
     int fromStdinFlag=FALSE;
     int toStdErrFlag=FALSE;
+    int stopLookingAtMeLikeThat=FALSE;
     char *message, buf[1024], buf1[1024];
     time_t  now;
     size_t addrLength;
@@ -129,7 +130,8 @@ extern int logger_main(int argc, char **argv)
         if (*((*argv)+1) == '\0') {
             fromStdinFlag=TRUE;
         }
-        while (*(++(*argv))) {
+        stopLookingAtMeLikeThat=FALSE;
+        while (*(++(*argv)) && stopLookingAtMeLikeThat==FALSE) {
             switch (**argv) {
             case 's':
                 toStdErrFlag = TRUE;
@@ -139,10 +141,7 @@ extern int logger_main(int argc, char **argv)
                     usage(logger_usage);
                 }
                 pri = pencode(*(++argv));
-                if (--argc == 0) {
-                    usage(logger_usage);
-                }
-                ++argv;
+                stopLookingAtMeLikeThat=TRUE;
                 break;
             default:
                 usage(logger_usage);
diff --git a/sysklogd/logger.c b/sysklogd/logger.c
index dfbc557ec..5ef622dc3 100644
--- a/sysklogd/logger.c
+++ b/sysklogd/logger.c
@@ -120,6 +120,7 @@ extern int logger_main(int argc, char **argv)
     int fd, pri = LOG_USER|LOG_NOTICE;
     int fromStdinFlag=FALSE;
     int toStdErrFlag=FALSE;
+    int stopLookingAtMeLikeThat=FALSE;
     char *message, buf[1024], buf1[1024];
     time_t  now;
     size_t addrLength;
@@ -129,7 +130,8 @@ extern int logger_main(int argc, char **argv)
         if (*((*argv)+1) == '\0') {
             fromStdinFlag=TRUE;
         }
-        while (*(++(*argv))) {
+        stopLookingAtMeLikeThat=FALSE;
+        while (*(++(*argv)) && stopLookingAtMeLikeThat==FALSE) {
             switch (**argv) {
             case 's':
                 toStdErrFlag = TRUE;
@@ -139,10 +141,7 @@ extern int logger_main(int argc, char **argv)
                     usage(logger_usage);
                 }
                 pri = pencode(*(++argv));
-                if (--argc == 0) {
-                    usage(logger_usage);
-                }
-                ++argv;
+                stopLookingAtMeLikeThat=TRUE;
                 break;
             default:
                 usage(logger_usage);
diff --git a/sysklogd/syslogd.c b/sysklogd/syslogd.c
index 24c721f8e..43e83b191 100644
--- a/sysklogd/syslogd.c
+++ b/sysklogd/syslogd.c
@@ -164,7 +164,6 @@ static void domark(int sig)
 {
     if (MarkInterval > 0) {
         logMessage(LOG_SYSLOG|LOG_INFO, "-- MARK --");
-        signal(SIGALRM, domark);
         alarm(MarkInterval);
     }
 }
diff --git a/syslogd.c b/syslogd.c
index 24c721f8e..43e83b191 100644
--- a/syslogd.c
+++ b/syslogd.c
@@ -164,7 +164,6 @@ static void domark(int sig)
 {
     if (MarkInterval > 0) {
         logMessage(LOG_SYSLOG|LOG_INFO, "-- MARK --");
-        signal(SIGALRM, domark);
         alarm(MarkInterval);
     }
 }
diff --git a/util-linux/fbset.c b/util-linux/fbset.c
new file mode 100644
index 000000000..3f7e4552a
--- /dev/null
+++ b/util-linux/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);
+}
+