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clients/image: print program usage 

Add function to print program usage. For now this is kind of useless,
but in the next commit we'll add more functionalities to clients/image
command line options.

Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
This commit is contained in:
Leandro Ribeiro 2024-04-19 17:18:18 -03:00
parent 576680c780
commit d76643ee47
1 changed files with 18 additions and 2 deletions
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20
clients/image.c
View File

@ -43,6 +43,7 @@
#include "window.h"
#include "shared/cairo-util.h"
#include "shared/helpers.h"
#include "shared/image-loader.h"
struct image {
@ -493,6 +494,15 @@ image_create(struct display *display, const char *filename,
return image;
}
static void
print_usage(const char *program_name)
{
fprintf(stderr, "Usage:\n %s [OPTIONS] [FILENAME0] [FILENAME1] ...\n\n" \
"Options:\n", program_name);
fprintf(stderr, "-h or --help to open this HELP dialogue.\n");
}
int
main(int argc, char *argv[])
{
@ -500,9 +510,15 @@ main(int argc, char *argv[])
int i;
int image_counter = 0;
int render_intent;
bool opt_help = false;
struct weston_option cli_options[] = {
{ WESTON_OPTION_BOOLEAN, "help", 'h', &opt_help },
};
if (argc <= 1 || argv[1][0]=='-') {
printf("Usage: %s image...\n", argv[0]);
parse_options(cli_options, ARRAY_LENGTH(cli_options), &argc, argv);
if (argc <= 1 || opt_help) {
print_usage(argv[0]);
return 1;
}