[Feature request] Support `--help` arg

[notslang]

It would be nice if the help text was shown when --help is passed in, rather than just -h.

When I first installed this, I tried man grabc, but that didn't work. Then I tried grabc --help, but that didn't work either, so I assumed that this program didn't take args at all until I came here and read the readme.

[muquit]

The latest v1.0.2 does print help message with -h. You have to compile it yourself however. I will make package for ubuntu available when get some time. The version in ubuntu is very old.

Example:

$ grabc -h
grabc v1.0.2
A program to identify a pixel color of an X Window
by [email protected] https://www.muquit.com/

Usage: grabc [options]
Where the options are:
 -v         - show version info
 -h         - show this usage
 -hex       - print pixel value as Hex on stdout
 -rgb       - print pixel value as RGB on stderr
 -W         - print the Window id at mouse click
 -w id      - window id in hex, use -l +x+y
 -l +x+y    - pixel co-ordinate. requires window id
 -d         - show debug messages
 -a         - Print all 16 bits of color. Default is high order 8 bits
Example:
* Print pixel color in hex on stdout:
   $ grabc
* Show usage:
   $ grabc -h
* Print Window Id (Note the upper case W):
   $ grabc -W
* Print pixel color of Window iwith id 0x13234 at location 10,20
   $ grabc -w 0x13234 -l +10+20

[notslang]

Yeah, I know that -h works. It would be nice if the help text was also shown when --help is passed in, rather than just -h.

[vikenemesh]

This patch does it for me, but I don't want to pressure anyone with a pull-request from a C-noob <.<

@muquit : Let me know If you want that little hack as a pull-request for convenient merging.

diff --git a/grabc.c b/grabc.c
index 91a5ec0..b93e61f 100644
--- a/grabc.c
+++ b/grabc.c
@@ -458,6 +458,10 @@ int main(int argc,char **argv)
     for (i=1; i < argc; i++)
     {
         option = argv[i];
+        if(*(option+1) == '-') {
+            // Move over one char when its double '-'
+            option++;
+        }
         switch(*(option+1))
         {
             case 'a':

In Action: