.TH FERROR 3S "19 January 1983"
ferror, feof, clearerr, fileno \- stream status inquiries
returns non-zero when end of file is read on the named input
returns non-zero when an error has occurred reading or writing
the error indication lasts until
resets the error indication on the named
returns the integer file descriptor
are implemented as macros;
they cannot be redeclared.