ferror - test error indicator on a stream
int ferror(FILE *stream);
[CX] 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.
[CX] The ferror() function shall not change the setting of errno if stream is valid.
The ferror() function shall return non-zero if and only if the error indicator is set for stream.
No errors are defined.
clearerr, feof, fopen
First released in Issue 1. Derived from Issue 1 of the SVID.
POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0125  is applied.
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