projects / unix-history / blame
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1 | .\" Copyright (c) 1980 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 86198885 | 5 | .\" @(#)ferror.3 6.4 (Berkeley) %G% |
| 31c2cc46 | 6 | .\" |
| 86198885 | 7 | .TH FERROR 3 "" |
| 31c2cc46 KM |
8 | .UC 4 |
| 9 | .SH NAME | |
| 68b48c9d | 10 | ferror, feof, clearerr, fileno \- stream status inquiries |
| 31c2cc46 KM |
11 | .SH SYNOPSIS |
| 12 | .B #include <stdio.h> | |
| 13 | .PP | |
| 14 | .B feof(stream) | |
| 15 | .br | |
| 16 | .SM | |
| 17 | .B FILE | |
| 18 | .B *stream; | |
| 19 | .PP | |
| 20 | .B ferror(stream) | |
| 21 | .br | |
| 22 | .SM | |
| 23 | .B FILE | |
| 24 | .B *stream | |
| 25 | .PP | |
| 26 | .B clearerr(stream) | |
| 27 | .br | |
| 28 | .SM | |
| 29 | .B FILE | |
| 30 | .B *stream | |
| 31 | .PP | |
| 32 | .B fileno(stream) | |
| 33 | .br | |
| 34 | .SM | |
| 35 | .B FILE | |
| 36 | .B *stream; | |
| 37 | .SH DESCRIPTION | |
| 38 | .I Feof | |
| 39 | returns non-zero when end of file is read on the named input | |
| 68b48c9d | 40 | .IR stream , |
| 31c2cc46 | 41 | otherwise zero. |
| 12e29951 MK |
42 | Unless cleared by |
| 43 | .IR clearerr , | |
| 44 | the end-of-file indication lasts until | |
| 45 | the stream is closed. | |
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46 | .PP |
| 47 | .I Ferror | |
| 48 | returns non-zero when an error has occurred reading or writing | |
| 49 | the named | |
| 68b48c9d | 50 | .IR stream , |
| 31c2cc46 KM |
51 | otherwise zero. |
| 52 | Unless cleared by | |
| 68b48c9d | 53 | .IR clearerr , |
| 31c2cc46 KM |
54 | the error indication lasts until |
| 55 | the stream is closed. | |
| 56 | .PP | |
| 5fe26733 | 57 | .I Clearerr |
| a40b6dc8 | 58 | resets the error and end-of-file indicators on the named |
| 68b48c9d | 59 | .IR stream . |
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60 | .PP |
| 61 | .I Fileno | |
| 62 | returns the integer file descriptor | |
| 63 | associated with the | |
| 68b48c9d | 64 | .IR stream , |
| 31c2cc46 | 65 | see |
| 12e29951 | 66 | .IR open (2). |
| 31c2cc46 | 67 | .PP |
| 12e29951 | 68 | Currently all of these functions |
| 31c2cc46 KM |
69 | are implemented as macros; |
| 70 | they cannot be redeclared. | |
| 71 | .SH "SEE ALSO" | |
| 86198885 | 72 | open(2), fopen(3) |