clearerr(3) [netbsd man page]

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

NAME

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

LIBRARY

     Standard C Library (libc, -lc)

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

     The functions clearerr(), feof(), and ferror() should neither fail nor set the external variable errno.  However, the function fileno() may
     fail and return -1 in case the argument stream is not associated with a valid file descriptor.  (In this case the NetBSD implementation does
     not follow the optional POSIX recommendation to set the errno variable to EBADF.)

SEE ALSO

     open(2), stdio(3)

STANDARDS

     The functions clearerr(), feof(), and ferror() conform to ANSI X3.159-1989 (``ANSI C89'').  The function fileno() conforms to ISO/IEC
     9945-1:1990 (``POSIX.1'').

BSD
								    May 6, 2010 							       BSD

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

NAME

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

LIBRARY

     Standard C Library (libc, -lc)

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

     The functions clearerr(), feof(), and ferror() should neither fail nor set the external variable errno.  However, the function fileno() may
     fail and return -1 in case the argument stream is not associated with a valid file descriptor.  (In this case the NetBSD implementation does
     not follow the optional POSIX recommendation to set the errno variable to EBADF.)

SEE ALSO

     open(2), stdio(3)

STANDARDS

     The functions clearerr(), feof(), and ferror() conform to ANSI X3.159-1989 (``ANSI C89'').  The function fileno() conforms to ISO/IEC
     9945-1:1990 (``POSIX.1'').

BSD
								    May 6, 2010 							       BSD