CREAT(3P) POSIX Programmer's Manual CREAT(3P)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.
NAMEcreat — create a new file or rewrite an existing one
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().
Refer to open().
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 oth‐
ers. The resulting file descriptor is assigned to the fd variable.
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char *pathname = "/tmp/file";
fd = creat(pathname, mode);
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.
SEE ALSOmknod(), open()
The Base Definitions volume of POSIX.1‐2008, <fcntl.h>, <sys_stat.h>,
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 Electri‐
cal 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 .
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IEEE/The Open Group 2013 CREAT(3P)