CVS commit: src/bin/sh

[David Laight <dsl%netbsd.org@localhost>]

Module Name:    src
Committed By:   dsl
Date:           Mon Feb 14 20:46:26 UTC 2005

Modified Files:
        src/bin/sh: expand.c

Log Message:
expbackq() was incorrectly backing up a temporary buffer when removing \n
from the end of output of commands inside $(...) substitutions.
If the program output is n*128+1 bytes long (ending in a \n) then the code
checks buf[-1] for another \n - looking an uninitialised stack.
On a big-endian system an integer of value 10 will satisfy this (unlikely
on little endian) and can happen depending on the last code path to use
a lot of stack!
This caused the problem with newvers.sh on sparc64 after ', 2005' was
added to the date list.
Fixed PR/28852


To generate a diff of this commit:
cvs rdiff -r1.67 -r1.68 src/bin/sh/expand.c

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