*
* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
*
- * 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 source tree.
*/
+//config:config LOADKMAP
+//config: bool "loadkmap (1.8 kb)"
+//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_NOEXEC(loadkmap, loadkmap, BB_DIR_SBIN, BB_SUID_DROP, loadkmap))
+
+//kbuild:lib-$(CONFIG_LOADKMAP) += loadkmap.o
-#include "busybox.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/ioctl.h>
+//usage:#define loadkmap_trivial_usage
+//usage: "< keymap"
+//usage:#define loadkmap_full_usage "\n\n"
+//usage: "Load a binary keyboard translation table from stdin"
+////usage: "\n"
+////usage: "\n -C TTY Affect TTY instead of /dev/tty"
+//usage:
+//usage:#define loadkmap_example_usage
+//usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
+
+#include "libbb.h"
#define BINARY_KEYMAP_MAGIC "bkeymap"
unsigned char kb_index;
unsigned short kb_value;
};
-static const int KDSKBENT = 0x4B47; /* sets one entry in translation table */
+/* sets one entry in translation table */
+#define KDSKBENT 0x4B47
/* 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 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;
- u_short *ibuff;
- int i, j, fd, readsz, pos, ibuffsz = NR_KEYS * sizeof(u_short);
- char flags[MAX_NR_KEYMAPS], buff[7];
-
- if (argc != 1)
- usage(loadkmap_usage);
+ int i, j, fd;
+ uint16_t ibuff[NR_KEYS];
+/* const char *tty_name = CURRENT_TTY; */
+ RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
- fd = open("/dev/tty0", O_RDWR);
- if (fd < 0)
- perror_msg_and_die("Error opening /dev/tty0");
+ /* 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]); */
- read(0, buff, 7);
- if (0 != strncmp(buff, BINARY_KEYMAP_MAGIC, 7))
- error_msg_and_die("This is not a valid binary keymap.\n");
+ fd = get_console_fd_or_die();
+/* or maybe:
+ opt = getopt32(argv, "C:", &tty_name);
+ fd = xopen_nonblocking(tty_name);
+*/
- if (MAX_NR_KEYMAPS != read(0, flags, MAX_NR_KEYMAPS))
- perror_msg_and_die("Error reading keymap flags");
+ xread(STDIN_FILENO, flags, 7);
+ if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC))
+ bb_simple_error_msg_and_die("not a valid binary keymap");
- ibuff = (u_short *) xmalloc(ibuffsz);
+ xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
- if (flags[i] == 1) {
- pos = 0;
- while (pos < ibuffsz) {
- if ((readsz = read(0, (char *) ibuff + pos, ibuffsz - pos)) < 0)
- perror_msg_and_die("Error reading keymap");
- pos += readsz;
- }
- 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);
}
}
- /* Don't bother to close files. Exit does that
- * automagically, so we can save a few bytes */
- /* close(fd); */
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(fd);
+ RELEASE_CONFIG_BUFFER(flags);
+ }
return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff