CREAT - Online Linux Manual PageSection : 3P
Updated : 2017
Source : IEEE/The Open Group
Note : POSIX Programmer's Manual

PROLOGThis 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

SYNOPSIS#include <sys/stat.h> #include <fcntl.h> int creat(const char *path, mode_t mode);

DESCRIPTIONThe 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 VALUERefer to open().

ERRORSRefer to open(). The following sections are informative.

EXAMPLES

Creating a FileThe 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 USAGENone.

RATIONALEThe 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 DIRECTIONSNone.

SEE ALSOmknod(), open() The Base Definitions volume of POSIX.1‐2017, <fcntl.h>, <sys_stat.h>, <sys_types.h>

COPYRIGHTPortions 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 . 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 .
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