*
* 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 */
+//config:config DUMPKMAP
+//config: bool "dumpkmap (1.3 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: This program dumps the kernel's keyboard translation table to
+//config: stdout, in binary format. You can then use loadkmap to load it.
+
+//applet:IF_DUMPKMAP(APPLET_NOEXEC(dumpkmap, dumpkmap, BB_DIR_BIN, BB_SUID_DROP, dumpkmap))
+/* bb_common_bufsiz1 usage here is safe wrt NOEXEC: not expecting it to be zeroed. */
+
+//kbuild:lib-$(CONFIG_DUMPKMAP) += dumpkmap.o
+
+//usage:#define dumpkmap_trivial_usage
+//usage: "> keymap"
+//usage:#define dumpkmap_full_usage "\n\n"
+//usage: "Print a binary keyboard translation table to stdout"
+//usage:
+//usage:#define dumpkmap_example_usage
+//usage: "$ dumpkmap > keymap\n"
#include "libbb.h"
+#include "common_bufsiz.h"
/* From <linux/kd.h> */
struct kbentry {
#define MAX_NR_KEYMAPS 256
int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int dumpkmap_main(int ATTRIBUTE_UNUSED argc, char ATTRIBUTE_UNUSED **argv)
+int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
{
struct kbentry ke;
int i, j, fd;
- RESERVE_CONFIG_BUFFER(flags,MAX_NR_KEYMAPS);
-
-/* bb_warn_ignoring_args(argc>=2);*/
-
- fd = xopen(CURRENT_VC, O_RDWR);
- write(STDOUT_FILENO, "bkeymap", 7);
+ /* 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]);*/
- /* 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;
+ fd = get_console_fd_or_die();
- /* dump flags */
- write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS);
+#define flags bb_common_bufsiz1
+ setup_common_bufsiz();
+ /* 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)
- 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_or_perror(fd, KDGKBENT, &ke,
- "ioctl failed with %s, %s, %p",
- (char *)&ke.kb_index,
- (char *)&ke.kb_table,
- &ke.kb_value)
+ "ioctl(KDGKBENT{%d,%d}) failed",
+ j, i)
) {
- write(STDOUT_FILENO, (void*)&ke.kb_value, 2);
+ write(STDOUT_FILENO, &ke.kb_value, 2);
}
}
}
}
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd);
- RELEASE_CONFIG_BUFFER(flags);
}
return EXIT_SUCCESS;
}