*
* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
*
- * 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.
*/
+//config:config LOADKMAP
+//config: bool "loadkmap"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: This program loads a keyboard translation table from
+//config: standard input.
+
+//applet:IF_LOADKMAP(APPLET(loadkmap, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_LOADKMAP) += loadkmap.o
-#include "busybox.h"
+//usage:#define loadkmap_trivial_usage
+//usage: "< keymap"
+//usage:#define loadkmap_full_usage "\n\n"
+//usage: "Load a binary keyboard translation table from stdin"
+////usage: "\n"
+////usage: "\n -C TTY Affect TTY instead of /dev/tty"
+//usage:
+//usage:#define loadkmap_example_usage
+//usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
+
+#include "libbb.h"
#define BINARY_KEYMAP_MAGIC "bkeymap"
#define NR_KEYS 128
#define MAX_NR_KEYMAPS 256
-int loadkmap_main(int argc, char **argv)
+int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int loadkmap_main(int argc UNUSED_PARAM, char **argv)
{
struct kbentry ke;
int i, j, fd;
- u_short ibuff[NR_KEYS];
- char flags[MAX_NR_KEYMAPS];
- char buff[7];
+ uint16_t ibuff[NR_KEYS];
+/* const char *tty_name = CURRENT_TTY; */
+ RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
- if (argc != 1)
+ /* When user accidentally runs "loadkmap FILE"
+ * instead of "loadkmap <FILE", we end up waiting for input from 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();
+/* or maybe:
+ opt = getopt32(argv, "C:", &tty_name);
+ fd = xopen_nonblocking(tty_name);
+*/
- xread(0, buff, 7);
- if (strncmp(buff, BINARY_KEYMAP_MAGIC, 7))
- bb_error_msg_and_die("This is not a valid binary keymap.");
+ xread(STDIN_FILENO, flags, 7);
+ if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC))
+ bb_error_msg_and_die("not a valid binary keymap");
- xread(0, flags, MAX_NR_KEYMAPS);
+ xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
- if (flags[i] == 1) {
- xread(0, ibuff, NR_KEYS * sizeof(u_short));
- for (j = 0; j < NR_KEYS; j++) {
- ke.kb_index = j;
- ke.kb_table = i;
- ke.kb_value = ibuff[j];
- ioctl(fd, KDSKBENT, &ke);
- }
+ if (flags[i] != 1)
+ continue;
+ xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
+ for (j = 0; j < NR_KEYS; j++) {
+ ke.kb_index = j;
+ ke.kb_table = i;
+ ke.kb_value = ibuff[j];
+ /*
+ * Note: table[idx:0] can contain special value
+ * K_ALLOCATED (marks allocated tables in kernel).
+ * dumpkmap saves the value as-is; but attempts
+ * to load it here fail, since it isn't a valid
+ * key value: it is K(KT_SPEC,126) == 2<<8 + 126,
+ * whereas last valid KT_SPEC is
+ * K_BARENUMLOCK == K(KT_SPEC,19).
+ * So far we just ignore these errors:
+ */
+ ioctl(fd, KDSKBENT, &ke);
}
}
- if (ENABLE_FEATURE_CLEAN_UP) close(fd);
- return 0;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(fd);
+ RELEASE_CONFIG_BUFFER(flags);
+ }
+ return EXIT_SUCCESS;
}