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Top Forums Shell Programming and Scripting Extract count of string in all files and display on date wise Post 302959963 by Don Cragun on Sunday 8th of November 2015 02:58:01 PM
Old 11-08-2015
Quote:
Originally Posted by Aia
Hi Don,

Then, shouldn't be: if [[ $tempdate != "" ]] ?
With single square brackets, you need the <dollar-sign> and quotes:
Code:
if [ "$template" != "" ]

because the shell is parsing operands to a built-in. But, double square brackets are part of the shell command language, not a built-in, so the <dollar-sign> and quotes are optional. All of the following produce the same results:
Code:
if [[ template != "" ]]
if [[ $template != "" ]]
if [[ "$template" != "" ]]

taking the then branch if $template expands to a non-empty string. But the following are equivalent to each other, but, unlike the above three commands, always take the then branch:
Code:
if [[ "template" != "" ]]
if [[ 'template' != "" ]]

 

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MKCOVER(8C)															       MKCOVER(8C)

NAME
mkcover - HylaFAX continuation cover page generation command SYNOPSIS
/var/spool/fax/bin/mkcover qfile template result DESCRIPTION
bin/mkcover is the command invoked by the facsimile server when a continuation cover page is required for an outbound job that is about to be retried. It generates a single POSTSCRIPT(R) page that is imaged according to the remote capabilities and transmitted as the cover page. The arguments are: qfile the job description file for the outbound job. template the cover page template file, as used by the faxcover(1) program. result the filename where the resultant POSTSCRIPT document should be written. The default mkcover command is a shell script that uses awk(1) to parse the job description file and generate the cover page document. The template file may be optionally compressed with compress(1), pack(1), or gzip(1); the filename suffix is used to decide whether or not the template file contains compressed data. SEE ALSO
faxq(8C), hylafax-config(5F), sendq(5F) June 20, 1994 MKCOVER(8C)
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