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`setbuf'--specify full buffering for a file or stream
void setbuf(FILE *FP, char *BUF);
`setbuf' specifies that output to the file or stream identified by FP
should be fully buffered. All output for this file will go to a buffer
(of size `BUFSIZ', specified in ``stdio.h''). Output will be passed on
to the host system only when the buffer is full, or when an input
You may, if you wish, supply your own buffer by passing a pointer to
it as the argument BUF. It must have size `BUFSIZ'. You can also use
`NULL' as the value of BUF, to signal that the `setbuf' function is to
allocate the buffer.
You may only use `setbuf' before performing any file operation other
than opening the file.
If you supply a non-null BUF, you must ensure that the associated
storage continues to be available until you close the stream identified
`setbuf' does not return a result.
Both ANSI C and the System V Interface Definition (Issue 2) require
`setbuf'. However, they differ on the meaning of a `NULL' buffer
pointer: the SVID issue 2 specification says that a `NULL' buffer
pointer requests unbuffered output. For maximum portability, avoid
`NULL' buffer pointers.
Supporting OS subroutines required: `close', `fstat', `isatty',
`lseek', `read', `sbrk', `write'.
Created Mon Nov 8 17:42:54 2004 on tillpc with info_to_html version 0.9.6.