FERROR Section: Linux Programmer's Manual (3) Updated: 29 November 2025 Index   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.   ERRORS These functions should not fail and do not set the external variable errno.   SEE ALSO   STANDARDS The functions clearerr, feof, and ferror conform to C3.159-1989 (``ANSI C'').   Index NAME SYNOPSIS DESCRIPTION ERRORS SEE ALSO STANDARDS This document was created by using the manual pages. Time: 11:58:02 GMT, March 24, 2025