fileno man page on Cygwin

fileno man page on Cygwin

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FILENO(3)			    NEWLIB			     FILENO(3)

NAME
       4.15 `fileno'--return file descriptor associated with stream

SYNOPSIS
	    #include <stdio.h>
	    int fileno(FILE *FP);

DESCRIPTION
       You can use `fileno' to return the file descriptor identified by FP.

RETURNS
       `fileno'	 returns a non-negative integer when successful.  If FP is not
       an open stream, `fileno' returns -1.


PORTABILITY
       `fileno' is not part of ANSI C.	POSIX requires `fileno'.

	  Supporting OS subroutines required: none.

SEE ALSO
       fileno is part of the library.  The full	 documentation	for  is	 main‐
       tained as a Texinfo manual.  If info and are properly installed at your
       site, the command

	      info

       will give you access to the complete manual.

NEWLIB				  April 2010			     FILENO(3)

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