flash_eraseall: implement -N

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

diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c
index f61795cf064ffb5aaa653380d3865c594027c37e..6b923d2d47bd4f9bd8d2152fe12f31f1eaa8ed3d 100644 (file)
--- a/console-tools/dumpkmap.c
+++ b/console-tools/dumpkmap.c
@@ -4,9 +4,18 @@
  *
  * Copyright (C) Arne Bernin <arne@matrix.loopback.org>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  *
  */
+/* no options, no getopt */
+
+//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"
 
@@ -22,19 +31,23 @@ struct kbentry {
 #define NR_KEYS 128
 #define MAX_NR_KEYMAPS 256
 
-int dumpkmap_main(int argc, char **argv);
-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];
+       RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
 
-       if (argc >= 2 && argv[1][0] == '-')
+       /* 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 = xopen(CURRENT_VC, O_RDWR);
+       fd = get_console_fd_or_die();
 
-       write(1, "bkeymap", 7);
+       write(STDOUT_FILENO, "bkeymap", 7);
 
        /* Here we want to set everything to 0 except for indexes:
         * [0-2] [4-6] [8-10] [12] */
@@ -43,24 +56,27 @@ int dumpkmap_main(int argc, char **argv)
        flags[3] = flags[7] = flags[11] = 0;
 
        /* dump flags */
-       write(1, flags, MAX_NR_KEYMAPS);
+       write(STDOUT_FILENO, 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) {
-                                       bb_perror_msg("ioctl failed with %s, %s, %p",
+                               if (!ioctl_or_perror(fd, KDGKBENT, &ke,
+                                               "ioctl failed with %s, %s, %p",
                                                (char *)&ke.kb_index,
                                                (char *)&ke.kb_table,
-                                               &ke.kb_value);
-                               } else {
-                                       write(1, (void*)&ke.kb_value, 2);
+                                               &ke.kb_value)
+                               ) {
+                                       write(STDOUT_FILENO, (void*)&ke.kb_value, 2);
                                }
                        }
                }
        }
-       close(fd);
+       if (ENABLE_FEATURE_CLEAN_UP) {
+               close(fd);
+               RELEASE_CONFIG_BUFFER(flags);
+       }
        return EXIT_SUCCESS;
 }