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From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Sun, 3 Jul 2011 16:32:03 +0000 (UTC)
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Subject: svn commit: r223742 - stable/8/etc
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Author: jilles
Date: Sun Jul  3 16:32:03 2011
New Revision: 223742
URL: http://svn.freebsd.org/changeset/base/223742

Log:
  MFC r223227: rc.subr: Eliminate about 100 forks from the boot sequence.
  
  With the current sh, placing eval in a command substitution always results
  in a fork(), even if it is the only command and only executes a single
  simple command. Therefore, avoid it where it can be avoided easily.
  
  Side effect: values starting with a hyphen and all whitespace are preserved.
  The values are defaults and names for rc.conf variables and messages to be
  given about obsolete ones.
  
  The change in the _echoonce function is not included in this MFC because
  stable/8 does not have this function.

Modified:
  stable/8/etc/rc.subr
Directory Properties:
  stable/8/etc/   (props changed)

Modified: stable/8/etc/rc.subr
==============================================================================
--- stable/8/etc/rc.subr	Sun Jul  3 16:08:38 2011	(r223741)
+++ stable/8/etc/rc.subr	Sun Jul  3 16:32:03 2011	(r223742)
@@ -1066,7 +1066,7 @@ load_rc_config()
 
 	# Set defaults if defined.
 	for _var in $rcvar $rcvars; do
-		_defval=`eval echo "\\\$${_var}_defval"`
+		eval _defval=\$${_var}_defval
 		if [ -n "$_defval" ]; then
 			eval : \${$_var:=\$${_var}_defval}
 		fi
@@ -1074,9 +1074,9 @@ load_rc_config()
 
 	# check obsolete rc.conf variables
 	for _var in $rcvars_obsolete; do
-		_v=`eval echo \\$$_var`
-		_msg=`eval echo \\$${_var}_obsolete_msg`
-		_new=`eval echo \\$${_var}_newvar`
+		eval _v=\$$_var
+		eval _msg=\$${_var}_obsolete_msg
+		eval _new=\$${_var}_newvar
 		case $_v in
 		"")
 			;;