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I have a directory and I want all files that are put in it to have the permissions of **5. In other words I want the permissions of the owner and group to stay the same but the permission to be read and execute for all other users.

Is this possible? I know I can periodically set the permissions of all the files in this folder but I was wondering if there was a way to automate it.

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1 Answer 1

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You may want to take a look at umask:

umask (user mask) is a command and a function in POSIX environments that sets the file mode creation mask of the current process which limits the permission modes for files and directories created by the process. A process may change the file mode creation mask with umask and the new value is inherited by child processes. When a shell (as with an output redirect) or other program creates a file or directory, it may specify permissions to be granted, however, permissions that the file mode creation mask does not allow are removed.

(from http://en.wikipedia.org/wiki/Umask)

Just set the desired umask mode at the beginning of your bash script to achieve the described effect.

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Thanks man, I appreciate it. See, I have samba on my linux server and when I put files from my windows comp into the share folder, the umask mode changes the permissions as I desired. However when I put files from my linux comp (the server) into the share folder, the permissions don't change –  user784637 Dec 18 '11 at 0:44
    
You could try mounting the folder in your server to a virtual path with the bind option while setting the umask for that bind mount. Then only put files into the bound path instead of the actual folder, i.e. mount --bind -o umask=0117 /home/files/smbfolder /home/files/virtualfolder –  bkzland Dec 18 '11 at 10:54

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