CVS commit: src/bin/sh

["Robert Elz" <kre%netbsd.org@localhost>]

Module Name:    src
Committed By:   kre
Date:           Tue Feb  4 16:06:59 UTC 2020

Modified Files:
        src/bin/sh: eval.c options.c

Log Message:
After bug report 262 (from 2010)
        https://austingroupbugs.net/view.php?id=252
the Austin Group decided to require processing of "--" by the "."
and "exec" commands to solve a problem where some shells did
option processing for those commands (permitted) and others did
not (also permitted) which left no safe way to process a file
with a name beginning with "-".

This has finally made its way into what will be the next version of
the POSIX standard.

Since this shell did no option processing at all for those commands,
we need to update.   This is that update.

The sole effect is that a "--" 'option' (to "." or "exec") is ignored.
This means that if you want to use "--" as the arg to one of those
commands, it needs to be given twice ". -- --".   Apart from that there
should be no difference at all (though the "--" can now be used in other
situations, where we did not require it before, and still do not).


To generate a diff of this commit:
cvs rdiff -u -r1.177 -r1.178 src/bin/sh/eval.c
cvs rdiff -u -r1.53 -r1.54 src/bin/sh/options.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.