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  clear-
       err function.

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

ERRORS
       These functions should not fail and do not set the  exter-
       nal variable errno.

SEE ALSO

open, stdio,

STANDARDS
       The  functions  clearerr,  feof,  and  ferror  conform  to
       C3.159-1989 (``ANSI C'').


















BSD MANPAGE              29 November 1993                       1

See also:

• https://wiki.sei.cmu.edu/confluence/display/c/ERR01-C.+Use+ferror%28%29+rather+than+errno+to+check+for+FILE+stream+errors? errno may be set if a file function did NOT error. Use ferror instead.