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
"")
;;
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