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
int creat(const char *path, mode_t mode);
The creat() function shall behave as if it is implemented as follows:
Refer to open().
int creat(const char *path, mode_t mode)
return open(path, O_WRONLY|O_CREAT|O_TRUNC, mode);
The following sections are informative.
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.
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
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char *pathname = "/tmp/file";
fd = creat(pathname, mode);
The Base Definitions volume of POSIX.1‐2017,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1-2017, Standard for Information Technology -- Portable Operating
System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018
Edition, Copyright (C) 2018 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 .
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