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Top Forums Shell Programming and Scripting sed variable substitution in a script Post 302629133 by eeisken on Tuesday 24th of April 2012 10:53:31 AM
Old 04-24-2012
sed variable substitution in a script

Hi I am trying to do the following in a script find a string and add in a block of text two lines above on the command line this works fine

Code:
#/usr/bin/cat /usr/local/etc/dhcpd.conf_subnet | /usr/xpg4/bin/sed -n -e '1h;1\!H;${;g;s/}.*#END of 10.42.33.0/#START of RANGE $dstart\:option tftp-server-name \"$smrsip4\"\;\:option ntp-servers $timeserver\;\:option cookie-servers $webserver\;\:range $dstart $dstop\;\:#END of RANGE $dstart\:}\:#END of $network/g;p;}' | tr \: \\n > /tmp/replace.out

but I have to specify the actual netid

in the scripted version I need to be able to use a variable for the netid and resolve this as well as the values to be added eg $dstart, $timeserver etc,
Code:
$CAT $G_CONFIG_SUB4 | $G_XPG_SED -n -e '1h;1\!H;${;g;s/}.*#END of ${network}/#START of RANGE $dstart\:option tftp-server-name \"$smrsip4\"\;\:option ntp-servers $timeserver\;\:optio
n cookie-servers $webserver\;\:range $dstart $dstop\;\:#END of RANGE $dstart\:}\:#END of $network/g;p;}' | tr \: \\n > /tmp/replace.out

but with the single quotes used to get the sed working these do not get resolved in the script, any ideas as to how I can get around this
 

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END(7)							  PostgreSQL 9.2.7 Documentation						    END(7)

NAME
END - commit the current transaction SYNOPSIS
END [ WORK | TRANSACTION ] DESCRIPTION
END commits the current transaction. All changes made by the transaction become visible to others and are guaranteed to be durable if a crash occurs. This command is a PostgreSQL extension that is equivalent to COMMIT(7). PARAMETERS
WORK, TRANSACTION Optional key words. They have no effect. NOTES
Use ROLLBACK(7) to abort a transaction. Issuing END when not inside a transaction does no harm, but it will provoke a warning message. EXAMPLES
To commit the current transaction and make all changes permanent: END; COMPATIBILITY
END is a PostgreSQL extension that provides functionality equivalent to COMMIT(7), which is specified in the SQL standard. SEE ALSO
BEGIN(7), COMMIT(7), ROLLBACK(7) PostgreSQL 9.2.7 2014-02-17 END(7)
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