1 | /* |
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2 | * Copyright (c) 2016 Joel Sherrill <joel@rtems.org>. All rights reserved. |
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3 | * |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that the following conditions |
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6 | * are met: |
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7 | * 1. Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * 2. Redistributions in binary form must reproduce the above copyright |
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10 | * notice, this list of conditions and the following disclaimer in the |
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11 | * documentation and/or other materials provided with the distribution. |
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12 | * |
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13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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23 | * SUCH DAMAGE. |
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24 | */ |
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25 | |
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26 | #if HAVE_CONFIG_H |
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27 | #include "config.h" |
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28 | #endif |
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29 | |
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30 | #define _POSIX_26_C_SOURCE |
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31 | |
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32 | #include <devctl.h> |
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33 | #include <sys/ioctl.h> |
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34 | #include <rtems/seterr.h> |
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35 | |
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36 | int posix_devctl( |
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37 | int fd, |
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38 | int dcmd, |
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39 | void *__restrict dev_data_ptr, |
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40 | size_t nbyte, |
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41 | int *__restrict dev_info_ptr |
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42 | ) |
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43 | { |
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44 | /* |
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45 | * The POSIX 1003.26 standard allows for library implementations |
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46 | * that implement posix_devctl() using ioctl(). In this case, |
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47 | * the extra parameters are largely ignored. |
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48 | * |
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49 | * The FACE Technical Standard requires only that FIONBIO |
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50 | * be supported for sockets. |
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51 | * |
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52 | * This method appears to be rarely implemented and there are |
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53 | * no known required use cases for this method beyond those |
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54 | * from the FACE Technical Standard. |
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55 | */ |
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56 | |
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57 | /* |
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58 | * POSIX 1003.26 mentions that nbyte must be non-negative but this |
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59 | * doesn't make sense because size_t is guaranteed to be unsigned. |
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60 | */ |
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61 | |
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62 | /* |
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63 | * Since this is implemented on top of ioctl(), the device information |
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64 | * is not going to be passed down. Fill it in with zero so the behavior |
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65 | * is defined. |
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66 | */ |
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67 | if (dev_info_ptr != NULL) { |
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68 | *dev_info_ptr = 0; |
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69 | } |
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70 | |
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71 | return ioctl(fd, dcmd, dev_data_ptr); |
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72 | } |
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