X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=console-tools%2Fdumpkmap.c;h=bf8d690daa87da922dede1d01965b5a29154cdf8;hb=e1603156ff96672375970f460716d37a50c63fae;hp=4ab711e5507eb30b2e2829ac37480127688eba25;hpb=dd19c6990496023fe23fefef8f1798740f7d39c6;p=oweals%2Fbusybox.git

diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c
index 4ab711e55..bf8d690da 100644
--- a/console-tools/dumpkmap.c
+++ b/console-tools/dumpkmap.c
@@ -4,30 +4,20 @@
  *
  * Copyright (C) Arne Bernin <arne@matrix.loopback.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 source tree.
  *
  */
+/* no options, no getopt */
 
-#include "busybox.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
+//usage:#define dumpkmap_trivial_usage
+//usage:       "> keymap"
+//usage:#define dumpkmap_full_usage "\n\n"
+//usage:       "Print a binary keyboard translation table to stdout"
+//usage:
+//usage:#define dumpkmap_example_usage
+//usage:       "$ dumpkmap > keymap\n"
+
+#include "libbb.h"
 
 /* From <linux/kd.h> */
 struct kbentry {
@@ -35,61 +25,67 @@ struct kbentry {
 	unsigned char kb_index;
 	unsigned short kb_value;
 };
-static const int KDGKBENT = 0x4B46;  /* gets one entry in translation table */
+#define KDGKBENT 0x4B46  /* gets one entry in translation table */
 
 /* From <linux/keyboard.h> */
-static const int NR_KEYS = 128;
-static const int MAX_NR_KEYMAPS = 256;
+#define NR_KEYS 128
+#define MAX_NR_KEYMAPS 256
 
-int dumpkmap_main(int argc, char **argv)
+int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
 {
 	struct kbentry ke;
 	int i, j, fd;
-	char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap";
+#define flags bb_common_bufsiz1
 
-	if (argc>=2 && *argv[1]=='-') {
-		usage(dumpkmap_usage);
-	}
+	/* When user accidentally runs "dumpkmap FILE"
+	 * instead of "dumpkmap >FILE", we'd dump binary stuff to tty.
+	 * Let's prevent it:
+	 */
+	if (argv[1])
+		bb_show_usage();
+/*	bb_warn_ignoring_args(argv[1]);*/
 
-	fd = open("/dev/tty0", O_RDWR);
-	if (fd < 0) {
-		perror_msg("Error opening /dev/tty0");
-		return EXIT_FAILURE;
-	}
-
-	write(1, magic, 7);
+	fd = get_console_fd_or_die();
 
-	for (i=0; i < MAX_NR_KEYMAPS; i++) flags[i]=0;
-	flags[0]=1; 
-	flags[1]=1;
-	flags[2]=1;
-	flags[4]=1;
-	flags[5]=1;
-	flags[6]=1;
-	flags[8]=1;
-	flags[9]=1;
-	flags[10]=1;
-	flags[12]=1;
-	
+#if 0
+	write(STDOUT_FILENO, "bkeymap", 7);
+	/* Here we want to set everything to 0 except for indexes:
+	 * [0-2] [4-6] [8-10] [12]
+	 */
+	/*memset(flags, 0x00, MAX_NR_KEYMAPS); - already is */
+	memset(flags, 0x01, 13);
+	flags[3] = flags[7] = flags[11] = 0;
 	/* dump flags */
-	for (i=0; i < MAX_NR_KEYMAPS; i++) write(1,&flags[i],1); 
+	write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS);
+#define flags7 flags
+#else
+	/* Same effect */
+	/*                     0 1 2 3 4 5 6 7 8 9 a b c=12 */
+	memcpy(flags, "bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1",
+	/* Can use sizeof, or sizeof-1. sizeof is even, using that */
+	/****/ sizeof("bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1")
+	);
+	write(STDOUT_FILENO, flags, 7 + MAX_NR_KEYMAPS);
+#define flags7 (flags + 7)
+#endif
 
-	for (i = 0; i < MAX_NR_KEYMAPS; i++) {
-		if (flags[i] == 1) {
+	for (i = 0; i < 13; i++) {
+		if (flags7[i]) {
 			for (j = 0; j < NR_KEYS; j++) {
 				ke.kb_index = j;
 				ke.kb_table = i;
-				if (ioctl(fd, KDGKBENT, &ke) < 0) {
-				
-					error_msg("ioctl returned: %s, %s, %s, %xqq", strerror(errno),(char *)&ke.kb_index,(char *)&ke.kb_table,(int)&ke.kb_value);
-					}
-				else {
-					write(1,(void*)&ke.kb_value,2);	
-					}	
-				
+				if (!ioctl_or_perror(fd, KDGKBENT, &ke,
+						"ioctl(KDGKBENT{%d,%d}) failed",
+						j, i)
+				) {
+					write(STDOUT_FILENO, &ke.kb_value, 2);
+				}
 			}
 		}
 	}
-	close(fd);
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		close(fd);
+	}
 	return EXIT_SUCCESS;
 }