The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

#### NAME

> creat - create a new file or rewrite an existing one

#### SYNOPSIS

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

#### DESCRIPTION

> The function call:

>     creat(path, mode)

> shall be equivalent to:

>     open(path, O_WRONLY|O_CREAT|O_TRUNC, mode)

#### RETURN VALUE

> Refer to open().

#### ERRORS

> Refer to open().

The following sections are informative.

#### EXAMPLES

> ##### 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 *filename = "/tmp/file";
>     ...
>     fd = creat(filename, mode);
>     ...

#### APPLICATION USAGE

> None.

#### RATIONALE

> 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

> None.

#### SEE ALSO

> open(), the Base Definitions volume of IEEE Std 1003.1-2001, <fcntl.h>, <sys/stat.h>, <sys/types.h>

#### CHANGE HISTORY

> First released in Issue 1. Derived from Issue 1 of the SVID.

#### Issue 6

> In the SYNOPSIS, the optional include of the <sys/types.h> header is removed.

> The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:

> - The requirement to include <sys/types.h> has been removed. Although <sys/types.h> was required for conforming implementations of previous POSIX specifications, it was not required for UNIX applications.

End of informative text.

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