07-11-2007
You are not error checking the return from your fscanf()
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LEARN ABOUT MOJAVE
clearerr_unlocked
FERROR(3) BSD Library Functions Manual FERROR(3)
NAME
clearerr, clearerr_unlocked, feof, feof_unlocked, ferror, ferror_unlocked, fileno, fileno_unlocked -- check and reset stream status
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
void
clearerr(FILE *stream);
void
clearerr_unlocked(FILE *stream);
int
feof(FILE *stream);
int
feof_unlocked(FILE *stream);
int
ferror(FILE *stream);
int
ferror_unlocked(FILE *stream);
int
fileno(FILE *stream);
int
fileno_unlocked(FILE *stream);
DESCRIPTION
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 may be cleared by explicitly calling clearerr(), or as a side-effect of other operations, e.g. fseek().
The function ferror() tests the error indicator for the stream pointed to by stream, returning non-zero if it is set.
The function fileno() examines the argument stream and returns its integer descriptor.
The clearerr_unlocked(), feof_unlocked(), ferror_unlocked(), and fileno_unlocked() functions are equivalent to clearerr(), feof(), ferror(),
and fileno() respectively, except that the caller is responsible for locking the stream with flockfile(3) before calling them. These func-
tions may be used to avoid the overhead of locking the stream and to prevent races when multiple threads are operating on the same stream.
ERRORS
These functions should not fail and do not set the external variable errno.
SEE ALSO
open(2), fdopen(3), flockfile(3), stdio(3)
STANDARDS
The functions clearerr(), feof(), and ferror() conform to ISO/IEC 9899:1990 (``ISO C90'').
BSD
January 28, 2009 BSD