clearerr, feof, ferror, fileno: zkontrolovat a resetovat stav proudu

Originální popis anglicky: clearerr, feof, ferror, fileno - check and reset stream status

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <stdio.h> void clearerr(FILE *stream); int feof(FILE *stream); int ferror(FILE *stream); int fileno(FILE *stream);

POPIS / INSTRUKCE

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. For non-locking counterparts, see unlocked_stdio(3).

CHYBY / ERRORY

These functions should not fail and do not set the external variable errno. (However, in case fileno detects that its argument is not a valid stream, it must return -1 and set errno to EBADF.)

ODPOVÍDAJÍCÍ

The functions clearerr, feof, and ferror conform to X3.159-1989 (``ANSI C'').

SOUVISEJÍCÍ

open(2), stdio(3), unlocked_stdio(3)