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creat
=====

Syntax
------

     #include <fcntl.h>
     #include <sys/stat.h> /* for mode definitions */
     
     int creat(const char *filename, mode_t mode);

Description
-----------

This function creates the given file and opens it for writing.  If the
file exists, it is truncated to zero size, unless it is read-only, in
which case the function fails.  If the file does not exist, it will be
created read-only if MODE does not have `S_IWUSR' set.

Return Value
------------

A file descriptor >= 0, or a negative number on error.

Example
-------

     int fd = creat("data", S_IRUSR|S_IWUSR);
     write(fd, buf, 1024);
     close(fd);