On 4/12/17 1:15 PM, Greg Silverman (CS) wrote: > > Many of the generated fixes uses this idiom > > IFS=$’\n’ … > > unset $IFS > > IFS is a variable, but, $IFS is a character string, so, unsetting it > does not restore IFS to its default value. What am I missing? >
Those lines are from the audit remediation templates, e.g.: https://github.com/OpenSCAP/scap-security-guide/blob/master/shared/xccdf/remediation_functions.xml#L97#L99 > IFS=$'\n' matches=($(sed -s -n -e "/${pattern}/!d" -e "/${arch}/!d" -e > "/${group}/!d;F" /etc/audit/rules.d/*.rules)) > # Reset IFS back to default > unset $IFS Because the variable is used multiple times (e.g. each audit remediation), it is a good practice to completely remove the variable/data from the system between function calls. For example: $ stringVar="This is my string" $ echo $stringVar This is my string $ unset stringVar $ echo $stringVar -bash: stringVar: unbound variable
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