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From: "Mark Paulus" <commpg AT yahoo DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date: Tue, 25 Sep 2001 13:17:55 -0600
Reply-To: "Mark Paulus" <commpg AT yahoo DOT com>
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Subject: Re: open() and mode

Maybe because O_WRONLY means "Open for Write Only", which
would imply write permissions, and not just Read???


On Tue, 25 Sep 2001 15:08:14 -0400, Ivan Dobrianov wrote:

>This may have a rather obvious answer, but I can't figure it:
>
>Does anyone know why the following code creates a file with read/write
>permissions, instead of only read permissions?
>-----------------------------
>#include <stdio.h>
>#include <fcntl.h>
>#include <sys/stat.h>
>
>int main(int argc, char* argv[])
>{
>   int openflag = (O_BINARY | O_CREAT | O_EXCL | O_WRONLY);
>   mode_t mode = 0x124;
>
>   int fd = open ("delme.txt", openflag, mode);
>
>   printf("fd = %d\n", fd);
>   mode_t mask = umask(0);
>   umask(mask);
>   printf("umask = %d\n", mask);
>}
>-----------------------------
>... then .. ls -l delme.txt gives:
>
>-rw-r--r--   1 administ None            0 Sep 25 14:40 delme.txt
>
>My umask is 0. I can chmod on the file to anything I want.
>
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