setpriv: dump ambient capabilities

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

diff --git a/console-tools/setkeycodes.c b/console-tools/setkeycodes.c
index 0911ede50573e80ca043b30b05b43a75772bc680..11fc37ae9609f3496c871baf75079744f1a8fef7 100644 (file)
--- a/console-tools/setkeycodes.c
+++ b/console-tools/setkeycodes.c
@@ -6,43 +6,64 @@
  *
  * Adjusted for BusyBox by Erik Andersen <andersen@codepoet.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.
  */
+//config:config SETKEYCODES
+//config:      bool "setkeycodes"
+//config:      default y
+//config:      select PLATFORM_LINUX
+//config:      help
+//config:        This program loads entries into the kernel's scancode-to-keycode
+//config:        map, allowing unusual keyboards to generate usable keycodes.
+
+//applet:IF_SETKEYCODES(APPLET(setkeycodes, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SETKEYCODES) += setkeycodes.o
+
+//usage:#define setkeycodes_trivial_usage
+//usage:       "SCANCODE KEYCODE..."
+//usage:#define setkeycodes_full_usage "\n\n"
+//usage:       "Set entries into the kernel's scancode-to-keycode map,\n"
+//usage:       "allowing unusual keyboards to generate usable keycodes.\n\n"
+//usage:       "SCANCODE may be either xx or e0xx (hexadecimal),\n"
+//usage:       "and KEYCODE is given in decimal."
+//usage:
+//usage:#define setkeycodes_example_usage
+//usage:       "$ setkeycodes e030 127\n"
 
-//#include <sys/ioctl.h>
 #include "libbb.h"
 
 /* From <linux/kd.h> */
 struct kbkeycode {
-       unsigned int scancode, keycode;
+       unsigned scancode, keycode;
 };
 enum {
        KDSETKEYCODE = 0x4B4D  /* write kernel keycode table entry */
 };
 
-int setkeycodes_main(int argc, char** argv);
-int setkeycodes_main(int argc, char** argv)
+int setkeycodes_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setkeycodes_main(int argc, char **argv)
 {
-       int fd, sc;
+       int fd;
        struct kbkeycode a;
 
-       if (argc % 2 != 1 || argc < 2) {
+       if (!(argc & 1) /* if even */ || argc < 2) {
                bb_show_usage();
        }
 
-       fd = get_console_fd();
+       fd = get_console_fd_or_die();
 
-       while (argc > 2) {
-               a.keycode = xatoul_range(argv[2], 0, 127);
-               a.scancode = sc = xstrtoul_range(argv[1], 16, 0, 255);
-               if (a.scancode > 127) {
-                       a.scancode -= 0xe000;
-                       a.scancode += 128;
-               }
-               if (ioctl(fd, KDSETKEYCODE, &a)) {
-                       bb_perror_msg_and_die("failed to set SCANCODE %x to KEYCODE %d", sc, a.keycode);
+       while (argv[1]) {
+               int sc = xstrtoul_range(argv[1], 16, 0, 0xe07f);
+               if (sc >= 0xe000) {
+                       sc -= 0xe000;
+                       sc += 0x0080;
                }
-               argc -= 2;
+               a.scancode = sc;
+               a.keycode = xatou_range(argv[2], 0, 255);
+               ioctl_or_perror_and_die(fd, KDSETKEYCODE, &a,
+                       "can't set SCANCODE %x to KEYCODE %d",
+                       sc, a.keycode);
                argv += 2;
        }
        return EXIT_SUCCESS;