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separated short options in theme file #49

ze- opened this issue Jun 5, 2011 · 3 comments

separated short options in theme file #49

ze- opened this issue Jun 5, 2011 · 3 comments


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ze- commented Jun 5, 2011

if a theme (but not normal commandline) contains multiple separate short options (e.g. -x -d instead of -xd), feh gives errors and ignores the first argument specified on commandline, or segfaults if no arguments are specified.
for example:
theme: feh --scale-down -x -d
commandline: feh ~/img.jpg
result: the following errors, and loading all images in . while ignoring ~/img.jpg
feh: invalid option -- '�'
feh: invalid option -- ''

experienced with 1.14.1

@ghost ghost assigned derf Jun 5, 2011
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derf commented Jun 5, 2011

I can't reproduce the segfault, but I do get the error messages. Looks like another case of weird memory management in feh/getopt... I'll see what I can do about it.

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I think I found the problem... and the fix is so simple:

diff --git a/src/options.c b/src/options.c
index b5a95dd..052f8a8 100644
--- a/src/options.c
+++ b/src/options.c
@@ -794,7 +794,7 @@ static void feh_parse_option_array(int argc, char **argv, int finalrun)
                add_file_to_filelist_recursively(".", FILELIST_FIRST);

        /* So that we can safely be called again */
-       optind = 1;
+       optind = 0;

from manpage:

A program that scans multiple argument vectors, or [snip], or changes the value of POSIXLY_CORRECT between scans, must reinitialize getopt() by resetting optind to 0, rather than the traditional value of 1. (Resetting to 0 forces the invocation of an internal initialization routine that rechecks POSIXLY_CORRECT and checks for GNU extensions in optstring.)

A small suggestion, "--debug" should be a special case, when loading theme options, there are some D() used, but they will never print anything out since "--debug" at least have to wait until theme options are processed. There should be a quick check on debug option at very early stage.

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derf commented Aug 1, 2011

Ooh. Yeah, that's looking good. Looks like I missed that while reading the documentation...

As for --debug: Right now it's useless for debugging getopt stuff, yeah. But I don't want yet another special case, I think I'll create a compile time switch for that (make debug=2 or similar). That way, you can really debug everything.

@derf derf closed this as completed Aug 1, 2011
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