NAME

ferror - Tests the error indicator on a stream

LIBRARY

Standard C Library (libc)

SYNOPSIS

#include <stdio.h>

int ferror(
        FILE ∗stream);

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

ferror(): XSH5.0

Refer to the standards(5) reference page for more information about industry standards and associated tags. 

PARAMETERS

streamSpecifies the input or output stream. 

DESCRIPTION

The ferror() function tests whether input/output errors have occurred on the specified stream. 

NOTES

[Tru64 UNIX]  The ferror() function may be a macro (depending on the compile-time definitions used in the source).  Consequently, you cannot use this interface where a function is necessary; for example, a subroutine pointer cannot point to it. 

RETURN VALUES

If an I/O error occurred when reading from or writing to the stream specified by the stream parameter, a nonzero value is returned.  Otherwise, a value of 0 (zero) is returned. 

RELATED INFORMATION

Functions: fopen(3), feof(3), fileno(3), clearerr(3)

Standards: standards(5)