CREAT
Section: POSIX Programmer's Manual (3P)
Updated: 2003
Index
Return to Main Contents
PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
creat - create a new file or rewrite an existing one
SYNOPSIS
#include <sys/stat.h>
#include <fcntl.h>
int creat(const char *path, mode_t mode);
DESCRIPTION
The function call:
-
creat(path, mode)
shall be equivalent to:
-
open(path, O_WRONLY|O_CREAT|O_TRUNC, mode)
RETURN VALUE
Refer to open().
ERRORS
Refer to open().
The following sections are informative.
EXAMPLES
Creating a File
The following example creates the file /tmp/file with read and
write permissions for the file owner and read permission
for group and others. The resulting file descriptor is assigned to
the fd variable.
-
#include <fcntl.h>
...
int fd;
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char *filename = "/tmp/file";
...
fd = creat(filename, mode);
...
APPLICATION USAGE
None.
RATIONALE
The creat() function is redundant. Its services are also provided
by the open() function. It has been included primarily for historical
purposes since many existing
applications depend on it. It is best considered a part of the C binding
rather than a function that should be provided in other
languages.
FUTURE DIRECTIONS
None.
SEE ALSO
open(), the Base Definitions volume of IEEE Std 1003.1-2001,
<fcntl.h>, <sys/stat.h>, <sys/types.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .