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add usage information - xscreenshot - screen capture tool |
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git clone git://git.codemadness.org/xscreenshot |
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Log |
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Files |
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Refs |
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README |
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LICENSE |
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--- |
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commit 5e5fc6da22d1a496e21a52941af91f85b58186d2 |
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parent 5f514c5284b3db94ecb4db1fea1e387d66ed4651 |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Mon, 28 Jul 2014 14:55:17 +0000 |
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add usage information |
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Signed-off-by: Hiltjo Posthuma <[email protected]> |
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Diffstat: |
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M xscreenshot.c | 12 +++++++++++- |
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1 file changed, 11 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/xscreenshot.c b/xscreenshot.c |
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@@ -93,6 +93,14 @@ pngstdout(XImage *img) |
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png_destroy_write_struct(&png_struct_p, NULL); |
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} |
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+static void |
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+usage(void) |
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+{ |
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+ die("xscreenshot-" VERSION |
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+ ", (c) 2014 xscreenshot engineers, see LICENSE for details\n" |
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+ "usage: xscreenshot [winid]"); |
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+} |
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+ |
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int |
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main(int argc, char *argv[]) |
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{ |
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@@ -107,10 +115,12 @@ main(int argc, char *argv[]) |
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/* win */ |
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if(argc > 1) { |
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+ if(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "-v") == 0) |
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+ usage(); |
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errno = 0; |
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win = (Window)strtol(argv[1], NULL, 0); |
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if(errno != 0) |
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- die("input not a number"); |
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+ usage(); |
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} else { |
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win = RootWindow(dpy, 0); |
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} |
