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Top Forums Shell Programming and Scripting Using regex in sed to validate the length of an entry Post 302417039 by snag49ers on Wednesday 28th of April 2010 10:50:45 AM
Old 04-28-2010
Using regex in sed to validate the length of an entry

I'm having trouble using sed to validate the length of an entry. I want to have a user enter a phone number of either length 7, 10 or 11. Only numbers are allowed. Does anyone know how to do this? Here's the code I have so far. It only validates that numbers are entered but not the length.


Code:
#make sure Phone Number only contains numbers
      while [[ ! -z $(echo $phone | sed 's/[0-9]//g') ]]; do
         echo ""
         printf "Please Enter The Contacts Phone Number (only numbers are allowed): "
         read phone
      done

 

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phones(4)							   File Formats 							 phones(4)

NAME
phones - remote host phone number database SYNOPSIS
/etc/phones DESCRIPTION
The file /etc/phones contains the system-wide private phone numbers for the tip(1) program. /etc/phones is normally unreadable, and so may contain privileged information. The format of /etc/phones is a series of lines of the form: <system-name>[ ]*<phone-number>. The system name is one of those defined in the remote(4) file and the phone number is constructed from [0123456789-=*%]. The `=' and `*' characters are indicators to the auto call units to pause and wait for a second dial tone (when going through an exchange). The `=' is required by the DF02-AC and the `*' is required by the BIZCOMP 1030. Comment lines are lines containing a `#' sign in the first column of the line. Only one phone number per line is permitted. However, if more than one line in the file contains the same system name tip(1) will attempt to dial each one in turn, until it establishes a connection. FILES
/etc/phones SEE ALSO
tip(1), remote(4) SunOS 5.10 14 Jan 1992 phones(4)
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