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showkey: make showkey -a work on any stdin

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function                                             old     new   delta
showkey_main                                         496     513     +17

Signed-off-by: Harald Becker <ralda@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Harald Becker 2011-02-27 07:16:44 +01:00 committed by Denys Vlasenko
parent cd387f2554
commit 9beb68e3e2
1 changed files with 24 additions and 13 deletions
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37
console-tools/showkey.c
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@ -56,37 +56,45 @@ int showkey_main(int argc UNUSED_PARAM, char **argv)
// FIXME: aks are all mutually exclusive // FIXME: aks are all mutually exclusive
getopt32(argv, "aks"); getopt32(argv, "aks");
// get keyboard settings
xioctl(STDIN_FILENO, KDGKBMODE, &kbmode);
printf("kb mode was %s\n\nPress any keys. Program terminates %s\n\n",
kbmode == K_RAW ? "RAW" :
(kbmode == K_XLATE ? "XLATE" :
(kbmode == K_MEDIUMRAW ? "MEDIUMRAW" :
(kbmode == K_UNICODE ? "UNICODE" : "UNKNOWN")))
, (option_mask32 & OPT_a) ? "on EOF (ctrl-D)" : "10s after last keypress"
);
// prepare for raw mode // prepare for raw mode
xget1(&tio, &tio0); xget1(&tio, &tio0);
// put stdin in raw mode // put stdin in raw mode
xset1(&tio); xset1(&tio);
#define press_keys "Press any keys, program terminates %s:\r\n\n"
if (option_mask32 & OPT_a) { if (option_mask32 & OPT_a) {
// just read stdin char by char
unsigned char c; unsigned char c;
// just read stdin char by char printf(press_keys, "on EOF (ctrl-D)");
// read and show byte values
while (1 == read(STDIN_FILENO, &c, 1)) { while (1 == read(STDIN_FILENO, &c, 1)) {
printf("%3u 0%03o 0x%02x\r\n", c, c, c); printf("%3u 0%03o 0x%02x\r\n", c, c, c);
if (04 /*CTRL-D*/ == c) if (04 /*CTRL-D*/ == c)
break; break;
} }
} else { } else {
// we assume a PC keyboard
xioctl(STDIN_FILENO, KDGKBMODE, &kbmode);
printf("Keyboard mode was %s.\r\n\n",
kbmode == K_RAW ? "RAW" :
(kbmode == K_XLATE ? "XLATE" :
(kbmode == K_MEDIUMRAW ? "MEDIUMRAW" :
(kbmode == K_UNICODE ? "UNICODE" : "UNKNOWN")))
);
// set raw keyboard mode // set raw keyboard mode
xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)((option_mask32 & OPT_k) ? K_MEDIUMRAW : K_RAW)); xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)((option_mask32 & OPT_k) ? K_MEDIUMRAW : K_RAW));
// we should exit on any signal; signals should interrupt read // we should exit on any signal; signals should interrupt read
bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo); bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo);
// inform user that program ends after time of inactivity
printf(press_keys, "10s after last keypress");
// read and show scancodes // read and show scancodes
while (!bb_got_signal) { while (!bb_got_signal) {
char buf[18]; char buf[18];
@ -94,6 +102,7 @@ int showkey_main(int argc UNUSED_PARAM, char **argv)
// setup 10s watchdog // setup 10s watchdog
alarm(10); alarm(10);
// read scancodes // read scancodes
n = read(STDIN_FILENO, buf, sizeof(buf)); n = read(STDIN_FILENO, buf, sizeof(buf));
i = 0; i = 0;
@ -121,11 +130,13 @@ int showkey_main(int argc UNUSED_PARAM, char **argv)
} }
puts("\r"); puts("\r");
} }
// restore keyboard mode
xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)kbmode);
} }
// restore keyboard and console settings // restore console settings
xset1(&tio0); xset1(&tio0);
xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)kbmode);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }