1FERROR(3P) POSIX Programmer's Manual FERROR(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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13 ferror — test error indicator on a stream
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16 #include <stdio.h>
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18 int ferror(FILE *stream);
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21 The functionality described on this reference page is aligned with the
22 ISO C standard. Any conflict between the requirements described here
23 and the ISO C standard is unintentional. This volume of POSIX.1‐2008
24 defers to the ISO C standard.
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26 The ferror() function shall test the error indicator for the stream
27 pointed to by stream.
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29 The ferror() function shall not change the setting of errno if stream
30 is valid.
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33 The ferror() function shall return non-zero if and only if the error
34 indicator is set for stream.
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37 No errors are defined.
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39 The following sections are informative.
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42 None.
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45 None.
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48 None.
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51 None.
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54 clearerr(), feof(), fopen()
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56 The Base Definitions volume of POSIX.1‐2008, <stdio.h>
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59 Portions of this text are reprinted and reproduced in electronic form
60 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
61 -- Portable Operating System Interface (POSIX), The Open Group Base
62 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
63 cal and Electronics Engineers, Inc and The Open Group. (This is
64 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
65 event of any discrepancy between this version and the original IEEE and
66 The Open Group Standard, the original IEEE and The Open Group Standard
67 is the referee document. The original Standard can be obtained online
68 at http://www.unix.org/online.html .
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70 Any typographical or formatting errors that appear in this page are
71 most likely to have been introduced during the conversion of the source
72 files to man page format. To report such errors, see https://www.ker‐
73 nel.org/doc/man-pages/reporting_bugs.html .
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77IEEE/The Open Group 2013 FERROR(3P)