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ferror |
Portability: | ISO/ANSI C conforming, UNIX compatible |
SYNOPSIS | |
DESCRIPTION | |
RETURN VALUE | |
IMPLEMENTATION | |
EXAMPLE | |
RELATED FUNCTIONS | |
SEE ALSO |
SYNOPSIS |
#include <stdio.h> int ferror(FILE *f);
DESCRIPTION |
ferror
tests whether the error flag has been set for the
FILE
object addressed by
f
. This
flag is set whenever an I/O function fails for any reason. The error flag
for a file remains set after an error until it is cleared with
clearerr
.
RETURN VALUE |
ferror
returns 0 if the error flag is not set and a nonzero value if the error flag
is set.
IMPLEMENTATION |
ferror(f)
(where
f
addresses a FILE object
for a file closed by
fclose
) is nonzero.
Other implementations may return 0 if
ferror
is used on a closed file.
EXAMPLE |
ferror
is illustrated in the example for
ftell
.
RELATED FUNCTIONS |
SEE ALSO |
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Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.