fileno(3s) [bsd man page]

FERROR(3S)																FERROR(3S)

NAME

       ferror, feof, clearerr, fileno - stream status inquiries

SYNOPSIS

       #include <stdio.h>

       feof(stream)
       FILE *stream;

       ferror(stream)
       FILE *stream

       clearerr(stream)
       FILE *stream

       fileno(stream)
       FILE *stream;

DESCRIPTION

       Feof  returns  non-zero	when  end  of file is read on the named input stream, otherwise zero.  Unless cleared by clearerr, the end-of-file
       indication lasts until the stream is closed.

       Ferror returns non-zero when an error has occurred reading or writing the named stream, otherwise zero.	Unless cleared	by  clearerr,  the
       error indication lasts until the stream is closed.

       Clearerr resets the error and end-of-file indicators on the named stream.

       Fileno returns the integer file descriptor associated with the stream, see open(2).

       Currently all of these functions are implemented as macros; they cannot be redeclared.

SEE ALSO

       fopen(3S), open(2)

4th Berkeley Distribution					   May 14, 1986 							FERROR(3S)

FERROR(3)						   BSD Library Functions Manual 						 FERROR(3)

NAME

     clearerr, clearerr_unlocked, feof, feof_unlocked, ferror, ferror_unlocked, fileno, fileno_unlocked -- check and reset stream status

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdio.h>

     void
     clearerr(FILE *stream);

     void
     clearerr_unlocked(FILE *stream);

     int
     feof(FILE *stream);

     int
     feof_unlocked(FILE *stream);

     int
     ferror(FILE *stream);

     int
     ferror_unlocked(FILE *stream);

     int
     fileno(FILE *stream);

     int
     fileno_unlocked(FILE *stream);

DESCRIPTION

     The function clearerr() clears the end-of-file and error indicators for the stream pointed to by stream.

     The function feof() tests the end-of-file indicator for the stream pointed to by stream, returning non-zero if it is set.	The end-of-file
     indicator can only be cleared by the function clearerr().

     The function ferror() tests the error indicator for the stream pointed to by stream, returning non-zero if it is set.  The error indicator
     can only be reset by the clearerr() function.

     The function fileno() examines the argument stream and returns its integer descriptor.

     The clearerr_unlocked(), feof_unlocked(), ferror_unlocked(), and fileno_unlocked() functions are equivalent to clearerr(), feof(), ferror(),
     and fileno() respectively, except that the caller is responsible for locking the stream with flockfile(3) before calling them.  These func-
     tions may be used to avoid the overhead of locking the stream and to prevent races when multiple threads are operating on the same stream.

ERRORS

     These functions should not fail and do not set the external variable errno.

SEE ALSO

     open(2), fdopen(3), flockfile(3), stdio(3)

STANDARDS

     The functions clearerr(), feof(), and ferror() conform to ISO/IEC 9899:1990 (``ISO C90'').

BSD
								 January 10, 2003							       BSD