Date: Fri, 27 May 2011 20:53:07 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r222386 - head/bin/sh Message-ID: <201105272053.p4RKr7Ls052579@svn.freebsd.org>
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Author: jilles Date: Fri May 27 20:53:07 2011 New Revision: 222386 URL: http://svn.freebsd.org/changeset/base/222386 Log: 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) Modified: head/bin/sh/arith_yacc.c head/bin/sh/builtins.def Modified: head/bin/sh/arith_yacc.c ============================================================================== --- head/bin/sh/arith_yacc.c Fri May 27 20:34:23 2011 (r222385) +++ head/bin/sh/arith_yacc.c Fri May 27 20:53:07 2011 (r222386) @@ -344,7 +344,7 @@ arith_t arith(const char *s) * The exp(1) builtin. */ int -expcmd(int argc, char **argv) +letcmd(int argc, char **argv) { const char *p; char *concat; Modified: head/bin/sh/builtins.def ============================================================================== --- head/bin/sh/builtins.def Fri May 27 20:34:23 2011 (r222385) +++ head/bin/sh/builtins.def Fri May 27 20:53:07 2011 (r222386) @@ -60,7 +60,7 @@ echocmd echo evalcmd -s eval execcmd -s exec exitcmd -s exit -expcmd exp let +letcmd let exportcmd -s export -s readonly #exprcmd expr falsecmd false
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