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If no input then set directory to current

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# 1  
Old 09-24-2015
If no input then set directory to current
Hi GUys

I have a script where i am counting the number of files that the user has read permissions to in a folder . They are asked for this folder at the start

if they dont enter anything then i want to be able to do the search on the current directory, can you help me with that part please ?

I am just using find commands for the permissions bit

Code:
echo " choose the dir "
read dir

fileread=$(find "$dir" -type f -perm u+r | wc -l)

echo "you have read permissions to $fileread files

Last edited by vbe; 09-24-2015 at 12:14 PM.. Reason: code tags
# 2  
Old 09-24-2015
Code:
find "${dir:-.}" -type f -perm u+r | wc -l

See Bash Reference Manual: Shell Parameter Expansion.
This User Gave Thanks to neutronscott For This Post:
johnnybananas
# 3  
Old 09-24-2015
They will have to press "enter" to terminate the read. Did you consider read's -t option (timeout) to terminate without ANY input?
# 4  
Old 09-24-2015
im getting bad substitution on that

case $# in
0) dir=${dir.-.}
esac
# 5  
Old 09-24-2015
Use a colon instead dot (exactly copying neutronscott's proposal).
# 6  
Old 09-24-2015
Please add "code" tags around your code!
According to your description you want at least u+r permissions (other permissions are allowed), so it must be -u+r
Code:
echo " choose the dir "
read dir
fileread=$(find "${dir:-.}" -type f -perm -u+r | wc -l)
echo "you have read permissions to $fileread files"

Or with parameters
Code:
fileread=$(find "${@:-.}" -type f -perm -u+r | wc -l)

NB the $@ expands within " " (unlike $*). This makes it possible to pass a dirname with embedded space (for exampe "this dir").
# 7  
Old 09-24-2015
Manually longhand using OSX 10.7.5, default bash terminal...
Always initialise the current directory before letting the timeout continue...
Code:
Last login: Thu Sep 24 20:02:19 on ttys000
AMIGA:barrywalker~> mydir=$(pwd)
AMIGA:barrywalker~> echo $mydir
/Users/barrywalker
AMIGA:barrywalker~> ls "$mydir"
03080.sh		03240.sh.txt		Downloads
03083.sh		03241.sh.txt		Library
03090.sh		2015			Movies
03100.sh		AAWG			Music
03120.sh		AudioScope.sh		Pictures
03140.sh		AudioScope.sh.txt	Public
03180.sh		AudioScope.sh~		Scope
03197.sh		AudioScope.txt		URL
03220.sh		BW_HELP			hexstring
03220.txt		Desktop			listing.txt
03240.sh		Documents		sox-14.4.0
AMIGA:barrywalker~> read -t5 mydir
/tmp/
AMIGA:barrywalker~> echo $mydir
/tmp/
AMIGA:barrywalker~> ls "$mydir"
launch-Az884J		launch-qrFcE6		launchd-119.lqY2J3
launch-PSV50N		launch-zRFZQJ		launchd-253.YZiA7D
AMIGA:barrywalker~> mydir=$(pwd)
AMIGA:barrywalker~> read -t5 mydir
AMIGA:barrywalker~> echo $mydir
/Users/barrywalker
AMIGA:barrywalker~> ls "$mydir"
03080.sh		03240.sh.txt		Downloads
03083.sh		03241.sh.txt		Library
03090.sh		2015			Movies
03100.sh		AAWG			Music
03120.sh		AudioScope.sh		Pictures
03140.sh		AudioScope.sh.txt	Public
03180.sh		AudioScope.sh~		Scope
03197.sh		AudioScope.txt		URL
03220.sh		BW_HELP			hexstring
03220.txt		Desktop			listing.txt
03240.sh		Documents		sox-14.4.0
AMIGA:barrywalker~> _
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