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Output to stdout on -h/--help to allow piping #144

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Output to stdout on -h/--help to allow piping #144

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12 changes: 6 additions & 6 deletions brightnessctl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ struct device;
enum operation;

static void fail(char *, ...);
static void usage(void);
static void usage(FILE *);
static float parse_exponent(const char *);
#define cat_with(...) _cat_with(__VA_ARGS__, NULL)
static char *_cat_with(char, ...);
Expand Down Expand Up @@ -177,7 +177,7 @@ int main(int argc, char **argv) {
p.exponent = 4;
break;
case 'h':
usage();
usage(stdout);
exit(EXIT_SUCCESS);
case 'c':
p.class = strdup(optarg);
Expand All @@ -194,7 +194,7 @@ int main(int argc, char **argv) {
}
}
if (phelp) {
usage();
usage(stderr);
exit(EXIT_FAILURE);
}
argc -= optind;
Expand Down Expand Up @@ -711,9 +711,9 @@ void fail(char *err_msg, ...) {
exit(EXIT_FAILURE);
}

void usage() {
fprintf(stderr, "brightnessctl %s - read and control device brightness.\n\n", VERSION);
fprintf(stderr,
void usage(FILE *stream) {
fprintf(stream, "brightnessctl %s - read and control device brightness.\n\n", VERSION);
fprintf(stream,
"Usage: brightnessctl [options] [operation] [value]\n\
\n\
Options:\n\
Expand Down