PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

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

PROLOG         top

       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         top

       creat — create a new file or rewrite an existing one

SYNOPSIS         top

       #include <sys/stat.h>
       #include <fcntl.h>

       int creat(const char *path, mode_t mode);

DESCRIPTION         top

       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         top

       Refer to open(3p).

ERRORS         top

       Refer to open(3p).

       The following sections are informative.

EXAMPLES         top

   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 *pathname = "/tmp/file";
           ...
           fd = creat(pathname, mode);
           ...

APPLICATION USAGE         top

       None.

RATIONALE         top

       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         top

       None.

SEE ALSO         top

       mknod(3p), open(3p)

       The Base Definitions volume of POSIX.1‐2008, fcntl.h(0p),
       sys_stat.h(0p), sys_types.h(0p)

COPYRIGHT         top

       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(3P)

Pages that refer to this page: fcntl.h(0p)pax(1p)touch(1p)fchmod(3p)fopen(3p)fstatvfs(3p)lockf(3p)mknod(3p)open(3p)posix_fallocate(3p)umask(3p)write(3p)