home *** CD-ROM | disk | FTP | other *** search
- .th CREAT II 8/5/73
- .sh NAME
- creat \*- create a new file
- .sh SYNOPSIS
- (creat = 8.)
- .br
- .ft B
- sys creat; name; mode
- .br
- .ft R
- (file descriptor in r0)
- .ft B
- .s3
- creat(name, mode)
- .br
- char *name;
- .ft R
- .sh DESCRIPTION
- .it Creat
- creates a new file or prepares to rewrite an existing
- file called
- .it name,
- given as the address of a null-terminated string.
- If the file did not exist, it is given
- mode
- .it mode.
- See
- .it chmod
- (II) for the
- construction of the
- .it mode
- argument.
- .s3
- If the file did exist, its mode and owner remain unchanged
- but it is truncated to 0 length.
- .s3
- The file is also opened for writing, and its file descriptor
- is returned (in r0).
- .s3
- The
- .it mode
- given is arbitrary; it need not allow
- writing.
- This feature is used by programs which deal with temporary
- files of fixed names.
- The creation is done with
- a mode that forbids writing.
- Then if a second
- instance of the program attempts a
- .it creat,
- an error is
- returned and the program knows that the name is unusable
- for the moment.
- .sh "SEE ALSO"
- write (II), close (II), stat (II)
- .sh DIAGNOSTICS
- The error bit
- (c-bit) may be set if: a needed directory is not searchable;
- the file does not exist and the directory
- in which it is to be created is not writable; the file
- does exist and is unwritable;
- the file is a directory;
- there are already too many files open.
- .s3
- From C, a \*-1 return indicates an error.
-