tac: *really* add tac.c now

[oweals/busybox.git] / console-tools / dumpkmap.c

diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c
index b438ba2713333802e6f83e9c02400f2d274991de..40b58f716eb497a9fca4bce68daef10a2400c518 100644 (file)
--- a/console-tools/dumpkmap.c
+++ b/console-tools/dumpkmap.c
@@ -4,27 +4,11 @@
  *
  * 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 tarball for details.
  *
  */
 
-#include "busybox.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/ioctl.h>
+#include "libbb.h"
 
 /* From <linux/kd.h> */
 struct kbentry {
@@ -32,58 +16,48 @@ 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) MAIN_EXTERNALLY_VISIBLE;
 int dumpkmap_main(int argc, char **argv)
 {
        struct kbentry ke;
        int i, j, fd;
-       char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap";
+       char flags[MAX_NR_KEYMAPS];
 
-       if (argc>=2 && *argv[1]=='-') {
-               usage(dumpkmap_usage);
-       }
+       if (argc >= 2 && argv[1][0] == '-')
+               bb_show_usage();
 
-       fd = open("/dev/tty0", O_RDWR);
-       if (fd < 0) {
-               perror_msg("Error opening /dev/tty0");
-               return EXIT_FAILURE;
-       }
+       fd = xopen(CURRENT_VC, O_RDWR);
+
+       write(1, "bkeymap", 7);
 
-       write(1, magic, 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);
+       memset(flags, 0x01, 13);
+       flags[3] = flags[7] = flags[11] = 0;
 
-       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;
-       
        /* dump flags */
-       for (i=0; i < MAX_NR_KEYMAPS; i++) write(1,&flags[i],1); 
+       write(1, flags, MAX_NR_KEYMAPS);
 
        for (i = 0; i < MAX_NR_KEYMAPS; i++) {
                if (flags[i] == 1) {
                        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\n",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 failed with %s, %s, %p",
+                                               (char *)&ke.kb_index,
+                                               (char *)&ke.kb_table,
+                                               &ke.kb_value)
+                               ) {
+                                       write(1, (void*)&ke.kb_value, 2);
+                               }
                        }
                }
        }