ferror
[test whether read/write error has
occurred]
SYNOPSIS
#include
<stdio.h>
int ferror(FILE
*fp);
DESCRIPTION
The stdio
functions maintain an error indicator
with each file pointer fp,
to record whether any read or write errors have occurred on the associated
file or stream. Use ferror
to query this indicator.
See clearerr to reset the error indicator.
RETURNS
ferror
returns 0
if no errors have occurred; it returns
a nonzero value otherwise.
COMPLIANCE
ANSI C requires
ferror.
No supporting OS subroutines are required.
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