NetBSD master CVS tree commits

[source%NetBSD.ORG@localhost]

christos
Fri Jan 24 12:26:30 EST 1997
Update of /cvsroot/src/bin/sh
In directory netbsd1:/var/slash-tmp/cvs-serv29196

Modified Files:
        expand.c 
Log Message:
- varisset(): In positional arguments, take into account VSNUL so that:
  set -- ""; echo ${1:-wwww} works.
- when expanding arithmetic, discard previous ifs recorded regions, since we
  are doing our own scanning. x=ab; echo $((${#x}+1)) now works.
- in ${var#word} fix two bugs:
   * if there was an exact match, there was an off-by-one bug in the
     comparison of the words. x=abcd; echo ${x#abcd}
   * if there was no match, the stack region was not adjusted and the rest
     of the word was getting written in the wrong place. x=123; echo ${x#abc}X