ferror3p
Test error indicator on a stream
Usage
#include <stdio.h>
int ferror(FILE *stream);
Prolog
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
Overview
The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2017 defers to the ISO C standard.
The ferror() function shall test the error indicator for the stream pointed to by stream.
The ferror() function shall not change the setting of errno if stream is valid.
Return value
The ferror() function shall return non-zero if and only if the error indicator is set for stream.
Errors
No errors are defined.
The following sections are informative.
Examples
None.
Application usage
None.
Rationale
None.
Future directions
None.