CVS commit: src/tests/bin/sh

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

Module Name:    src
Committed By:   kre
Date:           Fri Mar 27 19:02:46 UTC 2026

Modified Files:
        src/tests/bin/sh: t_expand.sh

Log Message:
Add a new land_mine test case

This new test case is intended to attempt to find buried
shell expansion code bugs, that don't often affect normal
scripts, (including most of the normal ATF tests) but can
cause problems with very odd ones.

It would have detected the bug introduced last Monday which
blew up the gettext libtool usage (because of clearly unintentional
libtool script code), which was fixed on Thursday.

It also would have detected a similar one, which was never
detected in the wild, which was installed in 2019, and also
fixed on Thursday.

Whether it can detect other similar problems in other cases is
unknown - probably not, until they are understood...   More sub-tests
here for more bizarre cases might help, or might not.

The sh in HEAD (since Thursday) passes this test as it is now.

While here, adjust one case that our shell allows, but others do
not .. $(( 1 << 63 )) is not guaranteed to work, as that's setting
the sign bit, which is unsafe.  Use a different method to calculate
the biggest possible positive 64 bit number.


To generate a diff of this commit:
cvs rdiff -u -r1.30 -r1.31 src/tests/bin/sh/t_expand.sh

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