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Full Discussion: Unmask
Top Forums UNIX for Dummies Questions & Answers Unmask Post 302241709 by era on Tuesday 30th of September 2008 03:50:48 AM
Old 09-30-2008
Actually the default mode depends on the program which creates the file; often it's 666 minus umask or 644 minus umask. Very rarely does a program attempt to create a file with the executable bit set.
 

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umask(2)							System Calls Manual							  umask(2)

NAME
umask - set and get file creation mask SYNOPSIS
DESCRIPTION
sets the process's file mode creation mask to cmask and returns the previous value of the mask. Only the file access permission bits of the masks are used. The bits set in cmask specify which permission bits to turn off in the mode of the created file, and should be specified using the symbolic values defined in stat(5). EXAMPLES
The following creates a file named in the current directory with permissions so that the file can be written only by its owner, and can be read or executed only by the owner or processes with group permission, even though group write permission and all permissions for others are passed in to RETURN VALUE
The previous value of the file mode creation mask is returned. SEE ALSO
mkdir(1), sh(1), mknod(1M), chmod(2), creat(2), mknod(2), open(2). STANDARDS CONFORMANCE
umask(2)
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