FERROR(3S)           INTERACTIVE UNIX System           FERROR(3S)



          NAME
               ferror, feof, clearerr, fileno - stream status inquiries

          SYNOPSIS
               #include <stdio.h>

               int ferror (stream)
               FILE *stream;

               int feof (stream)
               FILE *stream;

               void clearerr (stream)
               FILE *stream;

               int fileno (stream)
               FILE *stream;

          DESCRIPTION
               The ferror function returns non-zero when an I/O error has
               previously occurred reading from or writing to the named
               stream, otherwise zero.

               Feof returns non-zero when EOF has previously been detected
               reading the named input stream, otherwise zero.

               Clearerr resets the error indicator and EOF indicator to
               zero on the named stream.

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

          SEE ALSO
               open(2), fopen(3S), stdio(3S).

          NOTES
               All these functions are implemented as macros; they cannot
               be declared or redeclared.

















          Rev. C Software Development Set                            Page 1