Greg Hartman | 76d05dc | 2016-11-23 15:51:27 -0800 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------- * |
| 2 | * |
| 3 | * Copyright 2004-2008 H. Peter Anvin - All Rights Reserved |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person |
| 6 | * obtaining a copy of this software and associated documentation |
| 7 | * files (the "Software"), to deal in the Software without |
| 8 | * restriction, including without limitation the rights to use, |
| 9 | * copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom |
| 11 | * the Software is furnished to do so, subject to the following |
| 12 | * conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall |
| 15 | * be included in all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| 19 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| 21 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 22 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 24 | * OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | * ----------------------------------------------------------------------- */ |
| 27 | |
| 28 | /* |
| 29 | * close.c |
| 30 | */ |
| 31 | |
| 32 | #include <errno.h> |
| 33 | #include <com32.h> |
| 34 | #include <string.h> |
| 35 | #include "file.h" |
| 36 | |
| 37 | int close(int fd) |
| 38 | { |
| 39 | struct file_info *fp = &__file_info[fd]; |
| 40 | int rv = 0; |
| 41 | |
| 42 | if (fd >= NFILES || !fp->iop || !fp->oop) { |
| 43 | errno = EBADF; |
| 44 | return -1; |
| 45 | } |
| 46 | |
| 47 | if (fp->iop->close) { |
| 48 | rv = fp->iop->close(fp); |
| 49 | if (rv) |
| 50 | return rv; |
| 51 | } |
| 52 | fp->iop = &dev_error_r; |
| 53 | |
| 54 | if (fp->oop->close) { |
| 55 | rv = fp->oop->close(fp); |
| 56 | if (rv) |
| 57 | return rv; |
| 58 | } |
| 59 | |
| 60 | memset(fp, 0, sizeof *fp); /* File structure unused */ |
| 61 | return 0; |
| 62 | } |