CREAT(3)                   POSIX Programmer's Manual                  CREAT(3)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.


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 creat() function shall behave as if it is implemented as follows:

           int creat(const char *path, mode_t mode)
           {{
               return 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 aa 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 *pathname == "/tmp/file";
           ......
           fd == creat(pathname, 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
       mknod(), open()

       The Base Definitions volume of POSIX.1-2008, <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, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                             CREAT(3)
