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If no input then set directory to current

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Top Forums Shell Programming and Scripting If no input then set directory to current
# 22  
Old 09-29-2015
Quote:
Originally Posted by sea
Does this work?
Code:
case $dir in
(0) dir="$PWD";;
(1) dir="$dir";;
esac

If not, try:
Code:
[ -z "$dir" ] && dir="${PWD:-$(pwd)}"

Also, you want to adjust the variable names of the last 2 outputs, all the 3 use: $fileread for their output, while you fill filewrite and filecombi

hth


Your first case above is what i am using and thats not working. It works ok if user enters input but not working if i just press enter and enter nothing

yeah i fixed the outputs, thanks
# 23  
Old 09-29-2015
Try
Code:
read dir
if [ -z $dir ]
  then dir="$PWD"
  fi

This User Gave Thanks to RudiC For This Post:
johnnybananas
# 24  
Old 09-29-2015
awsome thanks for all the help. working fine now
# 25  
Old 09-29-2015
@rudi if the dir is empty there will be an error due to missing quotes/ single brackets.
# 26  
Old 09-29-2015
This is much too complicated...
Code:
read dir
dir="${dir:-$PWD}"

should do what has been requested.

If dir is not the empty string after the read, the assignment won't change it, and if dir is empty it will be replaced by an absolute pathname of the current directory.

The command:
Code:
dir=${PWD:-$(pwd)}

ALWAYS sets dir to an absolute pathname of the current working directory and could be written more simply as:
Code:
dir="$PWD"
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