Date: Fri, 27 May 2011 20:53:07 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/bin/sh arith_yacc.c builtins.def Message-ID: <201105272053.p4RKrRDT019046@repoman.freebsd.org>
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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
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