The Open Group Base Specifications Issue 8
IEEE Std 1003.1-2024
Copyright © 2001-2024 The IEEE and The Open Group

NAME

ferror — test error indicator on a stream

SYNOPSIS

#include <stdio.h>

int ferror(FILE *
stream);

DESCRIPTION

[CX] [Option Start] 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.1-2024 defers to the ISO C standard. [Option End]

The ferror() function shall test the error indicator for the stream pointed to by stream.

[CX] [Option Start] The ferror() function shall not change the setting of errno if stream is valid. [Option End]

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.

SEE ALSO

clearerr , feof , fopen

XBD <stdio.h>

CHANGE HISTORY

First released in Issue 1. Derived from Issue 1 of the SVID.

Issue 7

POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0125 [401] is applied.

End of informative text.

 

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