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CREAT

CREAT

Section: POSIX Programmer's Manual (P) Updated: 2003
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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 .


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
EXAMPLES
Creating a File
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT

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