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keymap tool: improve help

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Do not duplicate help strings, and add missing calling variant for
interactivity.
This commit is contained in:
Martin Pitt 2009-07-18 14:27:50 +02:00
parent acdf6ae7ac
commit b02c9fa19b
1 changed files with 16 additions and 6 deletions
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22
extras/keymap/keymap.c
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@ -272,6 +272,19 @@ static void interactive(int fd)
ioctl(fd, EVIOCGRAB, 0); ioctl(fd, EVIOCGRAB, 0);
} }
static void help(int error)
{
const char* h = "Usage: keymap <event device> [<map file>]\n"
" keymap -i <event device>\n";
if (error) {
fputs(h, stderr);
exit(2);
} else {
fputs(h, stdout);
exit(0);
}
}
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
static const struct option options[] = { static const struct option options[] = {
@ -291,8 +304,7 @@ int main(int argc, char **argv)
switch (option) { switch (option) {
case 'h': case 'h':
printf("Usage: keymap <event device> [<map file>]\n\n"); help(0);
return 0;
case 'i': case 'i':
opt_interactive = 1; opt_interactive = 1;
@ -302,10 +314,8 @@ int main(int argc, char **argv)
} }
} }
if (argc < optind+1 || argc > optind+2) { if (argc < optind+1 || argc > optind+2)
fprintf(stderr, "Usage: keymap <event device> [<map file>]\n\n"); help (1);
return 2;
}
if ((fd = evdev_open(argv[optind])) < 0) if ((fd = evdev_open(argv[optind])) < 0)
return 3; return 3;