Checking File Permissions 1

[ryanc2]

We have a script that was written to read a control file to delete records within certain directories. However, if the permissions aren't set correctly on the control file, the script deletes everything from the current working directory.

How can you check the permissions of a file in a if...then statement before moving on in the script to delete.

Thanks!

 

[fredericofonseca]

Not the full solution, but you can use it as a basis for your own.


perms=`ls -l file_to_check|cut -b 2-10`

owner_r=`echo $perms|cut -b 1`
owner_w=`echo $perms|cut -b 2`
owner_x=`echo $perms|cut -b 3`
group_r=`echo $perms|cut -b 4`
group_w=`echo $perms|cut -b 5`
group_x=`echo $perms|cut -b 6`
other_r=`echo $perms|cut -b 7`
other_w=`echo $perms|cut -b 8`
other_x=`echo $perms|cut -b 9`

After you have the variables you can just act on them.


Regards

Frederico Fonseca
SysSoft Integrated Ltd

http://www.syssoft-int.com

 

[Ygor]

from man ksh

-f file True if file exists and is an ordinary file.
-r file True if file exists and is readable by current process.
-w file True if file exists and is writable by current process.