parameter substitution (bash 0.99)

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1 total messages Started by Andy Fyfe Tue, 13 Jun 1989 20:54

#73

Author: Andy Fyfe
Date: Tue, 13 Jun 1989 20:54

6 lines
589 bytes

Given
	X=
	echo ${X:-abcd}
bash will echo "", while /bin/sh (sun, 3b1) and /bin/ksh (3b1) will
echo "abcd".  The man pages talk about varibles being "set and non-null"
or "not set or null".

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