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From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Fri, 27 May 2011 20:53:07 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/bin/sh arith_yacc.c builtins.def
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jilles      2011-05-27 20:53:07 UTC

  FreeBSD src repository

  Modified files:
    bin/sh               arith_yacc.c builtins.def 
  Log:
  SVN rev 222386 on 2011-05-27 20:53:07Z by jilles
  
  sh: Remove the "exp" builtin.
  
  The "exp" builtin is undocumented, non-standard and not very useful.
  
  If exp's return value is not used, something like
  VAR=$(exp EXPRESSION)
  is equivalent to
  VAR=$((EXPRESSION))
  except that errors in the expression are fatal and quoting special
  characters is not needed in the latter case.
  
  If exp's return value is used, something like
  if exp EXPRESSION >/dev/null
  can be replaced by
  if [ $((EXPRESSION)) -ne 0 ]
  with similar differences.
  
  The exp-run showed that "let" is close enough to bash's and ksh's builtin
  that removing it would break a few ports. Therefore, "let" remains in 9.x.
  
  PR:             bin/104432
  Exp-run done by: pav (with some other sh(1) changes)
  
  Revision  Changes    Path
  1.5       +1 -1      src/bin/sh/arith_yacc.c
  1.22      +1 -1      src/bin/sh/builtins.def