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ferror
NAME
ferror - return ERROR condition for file pointer
SYNOPSIS
#include <stdio.h>
int r = ferror(fp); (MACRO)
FILE *fp;
FUNCTION
ferror returns the ERROR status of a file pointer. The status is
not changed by this macro. 0 is returned if no ERROR condition
exists, non-zero if an ERROR condition exists (NOT necessarily 1 or
-1, just non-zero).
NOTE
refer to the file_pointer manual page for general information
INPUTS
FILE *fp; file pointer
RESULTS
int r; 0 if no ERROR condition exists, != 0 if an ERROR
condition exists (not necessarily 1 or -1).
SEE ALSO
fopen, fclose, fread, fwrite, fgets, fputs