Date: Sun, 12 Apr 1998 22:13:17 -0500 From: Dan Nelson <dnelson@emsphone.com> To: Dean Hollister <dean@odyssey.apana.org.au>, FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: bash: checking for empty string? Message-ID: <19980412221317.A10661@emsphone.com> In-Reply-To: <Pine.BSF.3.96.980413104954.2098A-100000@odyssey.apana.org.au>; from "Dean Hollister" on Mon Apr 13 10:50:47 GMT 1998 References: <Pine.BSF.3.96.980413104954.2098A-100000@odyssey.apana.org.au>
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In the last episode (Apr 13), Dean Hollister said: > Hiyall, > > If have a string $name. I need to check if this is blank, and if it > is, exit the script. Any ideas? These will work with any bourne-shell based script; not just bash. [ -z "$name" ] && exit [ "$name" = "" ] && exit if [ -z "$name" ] then exit fi Note that $name will expand to "" if $name is unset or is set to the empty string. To learn how to tell the difference, man sh and search for "parameter expansion". -Dan "You can rule the world with /bin/sh" Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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