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Top Forums Shell Programming and Scripting Force Input in User Defined Variable Post 302122169 by earnstaf on Tuesday 19th of June 2007 12:56:40 PM
Old 06-19-2007
Force Input in User Defined Variable

In a line such as:

Code:
echo -n "How many days back would you like to check? "; read days

How can I ensure that the user has a.) entered a number between 1-30 (not 0 or 31+) and b.) has not just hit enter (ie set it to "") and if it's entered wrong, how do I start the if statement over?

I think I figured out my first question while typing. I have:
EDIT: I didnt figure it out at all Smilie
Code:
if [ "$days" != [1-30] ]; then  #this doesnt work
echo "Please specify a number between 1 and 30."
echo -n "How many days back would you like to check? "; read days
else
...
fi

If they enter it wrong again, it errors. Is there a better way to do this?

Last edited by earnstaf; 06-19-2007 at 03:24 PM..
 

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CYR_EXPIRE(8)						      System Manager's Manual						     CYR_EXPIRE(8)

 *

NAME
cyr_expire - expire messages and duplicate delivery database entries SYNOPSIS
cyr_expire [ -C config-file ] [ -D delete-days ] -E expire-days [ -X expunge-days ] [ -p mailbox-prefix ] [ -v ] DESCRIPTION
Cyr_expire is used to expire messages and duplicate delivery database entries. Cyr_expire also cleanses mailboxes of partially expunged messages (when using the "delayed" expunge mode). The expiration of messages is controlled by the /vendor/cmu/cyrus-imapd/expire mailbox annotation which specifies the age (in days) of messages in the given mailbox that should be deleted. Any duplicate delivery database entries which correspond to the mailbox are also deleted at the same frequency. The value of the /vendor/cmu/cyrus-imapd/expire annotation is inherited by all children of the given mailbox, so an entire mailbox tree can be expired by seting a single annotation on the root of that tree. If a mailbox does not have a /vendor/cmu/cyrus-imapd/expire annotation set on it (or does not inherit one), then no messages are expired from the mailbox. Cyr_expire reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C. OPTIONS
-C config-file Read configuration options from config-file. -D delete-days Remove previously deleted mailboxes older than delete-days (when using the "delayed" delete mode). -E expire-days Prune the duplicate database of entries older than expire-days. This value is only used for entries which do not have a correspond- ing /vendor/cmu/cyrus-imapd/expire mailbox annotation. -X expunge-days Expunge previously deleted messages older than expunge-days (when using the "delayed" expunge mode). -x Do not expunge messages even if using delayed expunge mode (reduces the IO hit considerably, allowing you to run cyr_expire fre- quently to clean up the duplicate database without overloading your server) -p mailbox-prefix Only find mailboxes starting with this prefix. e.g. "user.justgotspammedlots" -v Enable verbose output. -a Skip the annotation lookup, so all /vendor/cmu/cyrus-imapd/expire annotations are ignored entirely. It behaves as if they were not set, so only expire-days is considered for all mailboxes. FILES
/etc/imapd.conf SEE ALSO
imapd.conf(5), master(8) CMU
Project Cyrus CYR_EXPIRE(8)
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