xscreenshot

commit 5e5fc6da22d1a496e21a52941af91f85b58186d2
parent 5f514c5284b3db94ecb4db1fea1e387d66ed4651
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Mon, 28 Jul 2014 14:55:17 +0000

add usage information

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>

Diffstat:
M
xscreenshot.c
 | 
12
+++++++++++-

1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/xscreenshot.c b/xscreenshot.c
@@ -93,6 +93,14 @@ pngstdout(XImage *img)
 	png_destroy_write_struct(&png_struct_p, NULL);
 }
 
+static void
+usage(void)
+{
+	die("xscreenshot-" VERSION
+	    ", (c) 2014 xscreenshot engineers, see LICENSE for details\n"
+	    "usage: xscreenshot [winid]");
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -107,10 +115,12 @@ main(int argc, char *argv[])
 
 	/* win */
 	if(argc > 1) {
+		if(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "-v") == 0)
+			usage();
 		errno = 0;
 		win = (Window)strtol(argv[1], NULL, 0);
 		if(errno != 0)
-			die("input not a number");
+			usage();
 	} else {
 		win = RootWindow(dpy, 0);
 	}