+/* vi: set sw=4 ts=4: */
/*
* 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
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*
* 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:
+ * 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 <string.h>
+#include <stdint.h>
#include <sys/ioctl.h>
-#include <linux/fb.h>
-
-#define PERROR(ctx) do { perror(ctx); exit(1); } while(0)
+#include "busybox.h"
-#define DEFAULTFBDEV "/dev/fb0"
+#define DEFAULTFBDEV FB_0
#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
+enum {
+ OPT_CHANGE = (1 << 0),
+ OPT_INFO = (1 << 1),
+ OPT_READMODE = (1 << 2),
+
+ CMD_FB = 1,
+ CMD_DB = 2,
+ CMD_GEOMETRY = 3,
+ CMD_TIMING = 4,
+ CMD_ACCEL = 5,
+ CMD_HSYNC = 6,
+ CMD_VSYNC = 7,
+ CMD_LACED = 8,
+ CMD_DOUBLE = 9,
+/* CMD_XCOMPAT = 10, */
+ CMD_ALL = 11,
+ CMD_INFO = 12,
+ CMD_CHANGE = 13,
+
+#ifdef CONFIG_FEATURE_FBSET_FANCY
+ CMD_XRES = 100,
+ CMD_YRES = 101,
+ CMD_VXRES = 102,
+ CMD_VYRES = 103,
+ CMD_DEPTH = 104,
+ CMD_MATCH = 105,
+ CMD_PIXCLOCK = 106,
+ CMD_LEFT = 107,
+ CMD_RIGHT = 108,
+ CMD_UPPER = 109,
+ CMD_LOWER = 110,
+ CMD_HSLEN = 111,
+ CMD_VSLEN = 112,
+ CMD_CSYNC = 113,
+ CMD_GSYNC = 114,
+ CMD_EXTSYNC = 115,
+ CMD_BCAST = 116,
+ CMD_RGBA = 117,
+ CMD_STEP = 118,
+ CMD_MOVE = 119,
#endif
+};
static unsigned int g_options = 0;
-struct cmdoptions_t {
- char *name;
- unsigned char param_count;
- unsigned char code;
+/* Stuff stolen from the kernel's fb.h */
+enum {
+ FBIOGET_VSCREENINFO = 0x4600,
+ FBIOPUT_VSCREENINFO = 0x4601
+};
+struct fb_bitfield {
+ uint32_t offset; /* beginning of bitfield */
+ uint32_t length; /* length of bitfield */
+ uint32_t msb_right; /* != 0 : Most significant bit is */
+ /* right */
+};
+struct fb_var_screeninfo {
+ uint32_t xres; /* visible resolution */
+ uint32_t yres;
+ uint32_t xres_virtual; /* virtual resolution */
+ uint32_t yres_virtual;
+ uint32_t xoffset; /* offset from virtual to visible */
+ uint32_t yoffset; /* resolution */
+
+ uint32_t bits_per_pixel; /* guess what */
+ uint32_t grayscale; /* != 0 Graylevels instead of colors */
+
+ struct fb_bitfield red; /* bitfield in fb mem if true color, */
+ struct fb_bitfield green; /* else only length is significant */
+ struct fb_bitfield blue;
+ struct fb_bitfield transp; /* transparency */
+
+ uint32_t nonstd; /* != 0 Non standard pixel format */
+
+ uint32_t activate; /* see FB_ACTIVATE_* */
+
+ uint32_t height; /* height of picture in mm */
+ uint32_t width; /* width of picture in mm */
+
+ uint32_t accel_flags; /* acceleration flags (hints) */
+
+ /* Timing: All values in pixclocks, except pixclock (of course) */
+ uint32_t pixclock; /* pixel clock in ps (pico seconds) */
+ uint32_t left_margin; /* time from sync to picture */
+ uint32_t right_margin; /* time from picture to sync */
+ uint32_t upper_margin; /* time from sync to picture */
+ uint32_t lower_margin;
+ uint32_t hsync_len; /* length of horizontal sync */
+ uint32_t vsync_len; /* length of vertical sync */
+ uint32_t sync; /* see FB_SYNC_* */
+ uint32_t vmode; /* see FB_VMODE_* */
+ uint32_t reserved[6]; /* Reserved for future compatibility */
+};
+
+
+static const struct cmdoptions_t {
+ const char *name;
+ const unsigned char param_count;
+ const 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 },
+ {
+ "-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}, {
+ "-n", 0, CMD_CHANGE}, {
+#ifdef CONFIG_FEATURE_FBSET_FANCY
+ "-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 }
+ 0, 0, 0}
};
+#ifdef CONFIG_FEATURE_FBSET_READMODE
+/* taken from linux/fb.h */
+enum {
+ FB_VMODE_INTERLACED = 1, /* interlaced */
+ FB_VMODE_DOUBLE = 2, /* double scan */
+ FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */
+ FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */
+ FB_SYNC_EXT = 4, /* external sync */
+ FB_SYNC_COMP_HIGH_ACT = 8 /* composite sync high active */
+};
+#endif
static int readmode(struct fb_var_screeninfo *base, const char *fn,
- const char *mode)
+ 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;
+#ifdef CONFIG_FEATURE_FBSET_READMODE
+ FILE *f;
+ char buf[256];
+ char *p = buf;
+
+ f = bb_xfopen(fn, "r");
+ 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 ((p = strstr(buf, "geometry "))) {
+ p += 9;
+
+ sscanf(p, "%d %d %d %d %d",
+ &(base->xres), &(base->yres),
+ &(base->xres_virtual), &(base->yres_virtual),
+ &(base->bits_per_pixel));
+ } else if ((p = strstr(buf, "timings "))) {
+ p += 8;
+
+ sscanf(p, "%d %d %d %d %d %d %d",
+ &(base->pixclock),
+ &(base->left_margin), &(base->right_margin),
+ &(base->upper_margin), &(base->lower_margin),
+ &(base->hsync_len), &(base->vsync_len));
+ } else if ((p = strstr(buf, "laced "))) {
+ p += 6;
+
+ if (strstr(buf, "false")) {
+ base->vmode &= ~FB_VMODE_INTERLACED;
+ } else {
+ base->vmode |= FB_VMODE_INTERLACED;
+ }
+ } else if ((p = strstr(buf, "double "))) {
+ p += 7;
+
+ if (strstr(buf, "false")) {
+ base->vmode &= ~FB_VMODE_DOUBLE;
+ } else {
+ base->vmode |= FB_VMODE_DOUBLE;
+ }
+ } else if ((p = strstr(buf, "vsync "))) {
+ p += 6;
+
+ if (strstr(buf, "low")) {
+ base->sync &= ~FB_SYNC_VERT_HIGH_ACT;
+ } else {
+ base->sync |= FB_SYNC_VERT_HIGH_ACT;
+ }
+ } else if ((p = strstr(buf, "hsync "))) {
+ p += 6;
+
+ if (strstr(buf, "low")) {
+ base->sync &= ~FB_SYNC_HOR_HIGH_ACT;
+ } else {
+ base->sync |= FB_SYNC_HOR_HIGH_ACT;
+ }
+ } else if ((p = strstr(buf, "csync "))) {
+ p += 6;
+
+ if (strstr(buf, "low")) {
+ base->sync &= ~FB_SYNC_COMP_HIGH_ACT;
+ } else {
+ base->sync |= FB_SYNC_COMP_HIGH_ACT;
+ }
+ } else if ((p = strstr(buf, "extsync "))) {
+ p += 8;
+
+ if (strstr(buf, "false")) {
+ base->sync &= ~FB_SYNC_EXT;
+ } else {
+ base->sync |= FB_SYNC_EXT;
+ }
+ }
+
+ if (strstr(buf, "endmode"))
+ return 1;
+ }
+ }
}
- }
}
- }
#else
- fprintf(stderr, "W: mode reading was disabled on this copy of fbset; ignoring request\n");
+ bb_error_msg( "mode reading not compiled in");
#endif
- return 0;
+ return 0;
}
-static void setmode(struct fb_var_screeninfo *base,
- struct fb_var_screeninfo *set)
+static inline 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;
+ 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)
+static inline 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");
-}
+ double drate = 0, hrate = 0, vrate = 0;
-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);
+ 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"
+#ifdef CONFIG_FEATURE_FBSET_FANCY
+ "\t# D: %.3f MHz, H: %.3f kHz, V: %.3f Hz\n"
#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);
+ "\tgeometry %u %u %u %u %u\n\ttimings %u %u %u %u %u %u %u\n\taccel %s\n\trgba %u/%u,%u/%u,%u/%u,%u/%u\nendmode\n\n",
+ v->xres, v->yres, (int) (vrate + 0.5),
+#ifdef CONFIG_FEATURE_FBSET_FANCY
+ drate / 1e6, hrate / 1e3, vrate,
+#endif
+ v->xres, v->yres, v->xres_virtual, v->yres_virtual,
+ v->bits_per_pixel, v->pixclock, v->left_margin,
+ v->right_margin, v->upper_margin, v->lower_margin, v->hsync_len,
+ v->vsync_len, (v->accel_flags > 0 ? "true" : "false"), v->red.length,
+ v->red.offset, v->green.length, v->green.offset, v->blue.length,
+ v->blue.offset, v->transp.length, v->transp.offset);
}
#ifdef STANDALONE
int main(int argc, char **argv)
-#else
-extern int fbset_main(int argc, char **argv)
+#else
+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;
+ struct fb_var_screeninfo var, varset;
+ 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)
+ bb_show_usage();
+ switch (g_cmdoptions[i].code) {
+ 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;
+ case CMD_CHANGE:
+ g_options |= OPT_CHANGE;
+ break;
+#ifdef CONFIG_FEATURE_FBSET_FANCY
+ case CMD_XRES:
+ varset.xres = strtoul(argv[1], 0, 0);
+ break;
+ case CMD_YRES:
+ varset.yres = strtoul(argv[1], 0, 0);
+ break;
+ case CMD_DEPTH:
+ varset.bits_per_pixel = 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 {
+ bb_show_usage();
+ }
}
- 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);
+
+ fh = bb_xopen(fbdev, O_RDONLY);
+ if (ioctl(fh, FBIOGET_VSCREENINFO, &var))
+ bb_perror_msg_and_die("fbset(ioctl)");
+ if (g_options & OPT_READMODE) {
+ if (!readmode(&var, modefile, mode)) {
+ bb_error_msg("Unknown video mode `%s'", mode);
+ return EXIT_FAILURE;
+ }
}
- }
-
- setmode(&var, &varset);
- if (g_options & OPT_CHANGE)
- if (ioctl(fh, FBIOPUT_VSCREENINFO, &var)) PERROR("fbset(ioctl)");
- showmode(&var);
- close(fh);
-
- return(TRUE);
-}
+ setmode(&var, &varset);
+ if (g_options & OPT_CHANGE)
+ if (ioctl(fh, FBIOPUT_VSCREENINFO, &var))
+ bb_perror_msg_and_die("fbset(ioctl)");
+ showmode(&var);
+ /* Don't close the file, as exiting will take care of that */
+ /* close(fh); */
+
+ return EXIT_SUCCESS;
+}
projects / oweals / busybox.git / blobdiff