diff options
Diffstat (limited to 'console-tools/dumpkmap.c')
-rw-r--r-- | console-tools/dumpkmap.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c new file mode 100644 index 0000000..7c6633a --- /dev/null +++ b/console-tools/dumpkmap.c @@ -0,0 +1,65 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini dumpkmap implementation for busybox + * + * Copyright (C) Arne Bernin <arne@matrix.loopback.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * + */ + +#include "busybox.h" + +/* From <linux/kd.h> */ +struct kbentry { + unsigned char kb_table; + unsigned char kb_index; + unsigned short kb_value; +}; +#define KDGKBENT 0x4B46 /* gets one entry in translation table */ + +/* From <linux/keyboard.h> */ +#define NR_KEYS 128 +#define MAX_NR_KEYMAPS 256 + +int dumpkmap_main(int argc, char **argv) +{ + struct kbentry ke; + int i, j, fd; + char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap"; + + if (argc >= 2 && *argv[1] == '-') + bb_show_usage(); + + fd = xopen(CURRENT_VC, O_RDWR); + + 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; + + /* dump flags */ + 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) { + bb_perror_msg("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); + } + } + } + } + close(fd); + return EXIT_SUCCESS; +} |