kbd_mode: support -C TTY option

function                                             old     new   delta
packed_usage                                       25334   25361     +27
kbd_mode_main                                        146     173     +27

console-tools/kbd_mode.c

@@ -7,26 +7,26 @@
  *   console-utils v0.2.3, licensed under GNU GPLv2
  *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- *
  */
-
 #include "libbb.h"
 #include <linux/kd.h>
 
 int kbd_mode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
 {
-	int fd;
-	unsigned opt;
 	enum {
 		SCANCODE  = (1 << 0),
 		ASCII	  = (1 << 1),
 		MEDIUMRAW = (1 << 2),
-		UNICODE	  = (1 << 3)
+		UNICODE	  = (1 << 3),
 	};
-	static const char KD_xxx[] ALIGN1 = "saku";
+	int fd;
-	opt = getopt32(argv, KD_xxx);
+	unsigned opt;
-	fd = get_console_fd_or_die();
+	const char *tty_name = CURRENT_TTY;
+
+	opt = getopt32(argv, "sakuC:", &tty_name);
+	fd = xopen(tty_name, O_NONBLOCK);
+	opt &= 0xf; /* clear -C bit, see (*) */
 
 	if (!opt) { /* print current setting */
 		const char *mode = "unknown";
@@ -43,6 +43,7 @@ int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
 			mode = "Unicode (UTF-8)";
 		printf("The keyboard is in %s mode\n", mode);
 	} else {
+		/* here we depend on specific bits assigned to options (*) */
 		opt = opt & UNICODE ? 3 : opt >> 1;
 		/* double cast prevents warnings about widening conversion */
 		xioctl(fd, KDSKBMODE, (void*)(ptrdiff_t)opt);

console-tools/loadfont.c

@@ -80,7 +80,10 @@ static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
 	}
 
 #if 0
-/* These ones do not honour -C tty (they set font on current tty regardless) */
+/* These ones do not honour -C tty (they set font on current tty regardless)
+ * On x86, this distinction is visible on framebuffer consoles
+ * (regular character consoles may have only one shared font anyway)
+ */
 #if defined(PIO_FONTX) && !defined(__sparc__)
 	{
 		struct consolefontdesc cfd;

console-tools/loadkmap.c

@@ -5,9 +5,7 @@
  * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
  *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- *
  */
-
 #include "libbb.h"
 
 #define BINARY_KEYMAP_MAGIC "bkeymap"
@@ -31,11 +29,15 @@ int loadkmap_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 	struct kbentry ke;
 	int i, j, fd;
 	uint16_t ibuff[NR_KEYS];
+/*	const char *tty_name = CURRENT_TTY; */
 	RESERVE_CONFIG_BUFFER(flags,MAX_NR_KEYMAPS);
 
 /* bb_warn_ignoring_args(argc >= 2); */
-
 	fd = get_console_fd_or_die();
+/* or maybe:
+	opt = getopt32(argv, "C:", &tty_name);
+	fd = xopen(tty_name, O_NONBLOCK);
+*/
 
 	xread(STDIN_FILENO, flags, 7);
 	if (strncmp(flags, BINARY_KEYMAP_MAGIC, 7))

include/usage.h

@@ -2019,7 +2019,7 @@
        "	[ttl TTL] [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]" \
 
 #define kbd_mode_trivial_usage \
-       "[-a|k|s|u]"
+       "[-a|k|s|u] [-C TTY]"
 #define kbd_mode_full_usage "\n\n" \
        "Report or set the keyboard mode\n" \
      "\nOptions set mode:" \
@@ -2027,6 +2027,7 @@
      "\n	-k	Medium-raw (keyboard)" \
      "\n	-s	Raw (scancode)" \
      "\n	-u	Unicode (utf-8)" \
+     "\n	-C TTY	Affect TTY instead of /dev/tty" \
 
 #define kill_trivial_usage \
        "[-l] [-SIG] PID..."
@@ -2129,20 +2130,23 @@
        "lrwxrwxrwx    1 root     root            7 Apr 12 18:39 ls -> BusyBox*\n"
 
 #define load_policy_trivial_usage NOUSAGE_STR
-
 #define load_policy_full_usage ""
 
 #define loadfont_trivial_usage \
        "< font"
 #define loadfont_full_usage "\n\n" \
-       "Load a console font from standard input"
+       "Load a console font from standard input" \
+/*   "\n	-C TTY	Affect TTY instead of /dev/tty" */ \
+
 #define loadfont_example_usage \
        "$ loadfont < /etc/i18n/fontname\n"
 
 #define loadkmap_trivial_usage \
        "< keymap"
 #define loadkmap_full_usage "\n\n" \
-       "Load a binary keyboard translation table from standard input"
+       "Load a binary keyboard translation table from standard input\n" \
+/*   "\n	-C TTY	Affect TTY instead of /dev/tty" */ \
+
 #define loadkmap_example_usage \
        "$ loadkmap < /etc/i18n/lang-keymap\n"
 
@@ -3476,9 +3480,11 @@
        "Start and monitor a service and optionally an appendant log service"
 
 #define runsvdir_trivial_usage \
-       "[-P] dir"
+       "[-P] [-s SCRIPT] dir"
 #define runsvdir_full_usage "\n\n" \
-       "Start a runsv process for each subdirectory"
+       "Start a runsv process for each subdirectory. If it exits, restart it.\n" \
+     "\n	-P		Put each runsv in a new session" \
+     "\n	-s SCRIPT	Run SCRIPT <signo> after signal is processed" \
 
 #define rx_trivial_usage \
        "FILE"