keymap tool: improve help
Do not duplicate help strings, and add missing calling variant for interactivity.
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@ -272,6 +272,19 @@ static void interactive(int fd)
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ioctl(fd, EVIOCGRAB, 0);
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}
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static void help(int error)
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{
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const char* h = "Usage: keymap <event device> [<map file>]\n"
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" keymap -i <event device>\n";
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if (error) {
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fputs(h, stderr);
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exit(2);
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} else {
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fputs(h, stdout);
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exit(0);
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}
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}
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int main(int argc, char **argv)
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{
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static const struct option options[] = {
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@ -291,8 +304,7 @@ int main(int argc, char **argv)
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switch (option) {
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case 'h':
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printf("Usage: keymap <event device> [<map file>]\n\n");
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return 0;
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help(0);
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case 'i':
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opt_interactive = 1;
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@ -302,10 +314,8 @@ int main(int argc, char **argv)
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}
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}
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if (argc < optind+1 || argc > optind+2) {
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fprintf(stderr, "Usage: keymap <event device> [<map file>]\n\n");
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return 2;
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}
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if (argc < optind+1 || argc > optind+2)
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help (1);
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if ((fd = evdev_open(argv[optind])) < 0)
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return 3;
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