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Date: Tue, 25 Sep 2001 21:33:48 +0200
To: cygwin AT cygwin DOT com
Subject: Re: open() and mode
Message-ID: <20010925213348.B551@mainframe>
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References: <3BB0D61D DOT 1C93BC64 AT cornell DOT edu>
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In-Reply-To: <3BB0D61D.1C93BC64@cornell.edu>; from id11@cornell.edu on Tue, Sep 25, 2001 at 03:08:14PM -0400
From: Martin Jerabek <martin DOT jerabek AT utanet DOT at>

On Tue, Sep 25, 2001 at 03:08:14PM -0400, Ivan Dobrianov wrote:
> Does anyone know why the following code creates a file with read/write
> permissions, instead of only read permissions?

If I am not completely wrong, you must set the umask *before*
creating/opening the file. Setting it afterwards does not influence the
permissions of the file just created.

>    int fd = open ("delme.txt", openflag, mode);
> 
>    printf("fd = %d\n", fd);
>    mode_t mask = umask(0);
>    umask(mask);
>    printf("umask = %d\n", mask);

Bye
Jerry

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