git-svn-id: http://svn.ipfire.org/svn/ipfire/IPFire/source@16 ea5c0bd1-69bd-2848...

[ipfire-2.x.git] / src / scripts / readhash

diff --git a/src/scripts/readhash b/src/scripts/readhash
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+++ b/src/scripts/readhash
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+#!/bin/sh
+#
+# This script reads in variables from a config file, and produces a list of
+# commands to run to set these as shell environment variables, it is
+# intended to be used as follows:
+#
+#   eval $(readhash /var/ipcop/main/settings)
+#
+
+# shell variables must consist of alphanumeric characters and underscores,
+# and begin with an alphabetic character or underscore.
+VARNAME='[A-Za-z_][A-zA-z0-9_]*'
+
+# For the assigned value we only accept a limited number of characters - none
+# of which are shell metachars
+VARCHARS='A-Za-z0-9=/,._@#+-'
+VARVAL="[${VARCHARS}]*"
+
+sed -ne "s/^\(${VARNAME}\)=\(${VARVAL}\)$/\1=\2/p" $1
+
+# Accept space only if it's quoted
+sed -ne "s/^\(${VARNAME}\)=\('[ ${VARCHARS}]*'\)$/\1=\2/p" $1