CREAT(P) POSIX Programmer s Manual CREAT(P)

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 oth- ers. 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 pur- poses since many existing applications depend on it. It is best consid- ered a part of the C binding rather than a function that should be pro- vided 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 .

IEEE/The Open Group 2003 CREAT(P)