ferror(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)						     Linux Programmer's Manual							 FERROR(3)

NAME

       clearerr, feof, ferror, fileno - check and reset stream status

SYNOPSIS

       #include <stdio.h>

       void clearerr(FILE *stream);
       int feof(FILE *stream);
       int ferror(FILE *stream);
       int fileno(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.

       For non-locking counterparts, see unlocked_stdio(3).

ERRORS

       These  functions  should  not fail and do not set the external variable errno.  (However, in case fileno detects that its argument is not a
       valid stream, it must return -1 and set errno to EBADF.)

CONFORMING TO

       The functions clearerr, feof, and ferror conform to X3.159-1989 (``ANSI C'').

SEE ALSO

       open(2), unlocked_stdio(3), stdio(3)

								    2001-10-16								 FERROR(3)