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CREAT(3P) POSIX Programmer's Manual CREAT(3P)
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.
creat — create a new file or rewrite an existing one
#include <sys/stat.h>
#include <fcntl.h>
int creat(const char *path, mode_t mode);
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);
}
Refer to open(3p).
Refer to open(3p).
The following sections are informative.
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);
...
None.
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.
None.
mknod(3p), open(3p)
The Base Definitions volume of POSIX.1‐2008, fcntl.h(0p),
sys_stat.h(0p), sys_types.h(0p)
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)