Manpage of FREOPEN
FREOPEN
Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME
3.16 `freopen'--open a file using an existing file descriptor
SYNOPSIS
#include <stdio.h>
FILE *freopen(const char *FILE, const char *MODE,
FILE *FP);
FILE *_freopen_r(struct _reent *PTR, const char *FILE,
const char *MODE, FILE *FP);
DESCRIPTION
Use this variant of `fopen' if you wish to specify a particular file
descriptor FP (notably `stdin', `stdout', or `stderr') for the file.
If FP was associated with another file or stream, `freopen' closes
that other file or stream (but ignores any errors while closing it).
FILE and MODE are used just as in `fopen'.
RETURNS
If successful, the result is the same as the argument FP. If the file
cannot be opened as specified, the result is `NULL'.
PORTABILITY
ANSI C requires `freopen'.
Supporting OS subroutines required: `close', `fstat', `isatty',
`lseek', `open', `read', `sbrk', `write'.
SEE ALSO
freopen
is part of the
libc
library.
The full documentation for
libc
is maintained as a Texinfo manual. If
info
and
libc
are properly installed at your site, the command
-
info libc
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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