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- | 1 | /* |
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- | 2 | * Copyright (c) 1987,1997, Prentice Hall |
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- | 3 | * All rights reserved. |
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- | 4 | * |
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- | 5 | * Redistribution and use of the MINIX operating system in source and |
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- | 6 | * binary forms, with or without modification, are permitted provided |
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- | 7 | * that the following conditions are met: |
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- | 8 | ||
1 | /* This file contains the procedures for support directory operations. */ |
9 | * - Redistributions of source code must retain the above copyright |
- | 10 | * notice, this list of conditions and the following disclaimer. |
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2 | 11 | ||
- | 12 | * - Redistributions in binary form must reproduce the above |
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- | 13 | * copyright notice, this list of conditions and the following |
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- | 14 | * disclaimer in the documentation and/or other materials provided |
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3 | /* Methods: |
15 | * with the distribution. |
- | 16 | ||
- | 17 | * - Neither the name of Prentice Hall nor the names of the software |
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4 | * do_sum: return total number of directory entries |
18 | * authors or contributors may be used to endorse or promote |
- | 19 | * products derived from this software without specific prior |
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- | 20 | * written permission. |
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- | 21 | ||
- | 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND |
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- | 23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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- | 24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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- | 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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- | 26 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE |
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- | 27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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- | 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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- | 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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- | 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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- | 31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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- | 32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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- | 33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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- | 34 | */ |
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- | 35 | ||
- | 36 | /** @addtogroup FileSystemImpl |
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- | 37 | * @{ |
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- | 38 | */ |
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- | 39 | ||
- | 40 | /** |
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- | 41 | * @file dir.c |
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5 | * do_readentry: fill in the user buffer with directory entry specified by number |
42 | * @brief This file contains the procedures for support directory operations. |
6 | */ |
43 | */ |
7 | - | ||
8 | 44 | ||
9 | #include <stdio.h> |
45 | #include <stdio.h> |
10 | #include "fs.h" |
46 | #include "fs.h" |
11 | #include "dir.h" |
47 | #include "dir.h" |
12 | #include "block.h" |
48 | #include "block.h" |
13 | #include "inode.h" |
49 | #include "inode.h" |
14 | #include "param.h" |
50 | #include "param.h" |
15 | 51 | ||
16 | 52 | /** |
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- | 53 | * Return total number of directory entries |
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- | 54 | */ |
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17 | int do_sum() |
55 | int do_sum() |
18 | { |
56 | { |
19 | 57 | ||
20 | /* Perform dsum system call. */ |
58 | /* Perform dsum system call. */ |
21 | 59 | ||
Line 38... | Line 76... | ||
38 | } |
76 | } |
39 | 77 | ||
40 | return dir_count; |
78 | return dir_count; |
41 | } |
79 | } |
42 | 80 | ||
43 | 81 | /** |
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- | 82 | * Fill in the user buffer with directory entry specified by number |
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- | 83 | */ |
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44 | int do_readentry() |
84 | int do_readentry() |
45 | { |
85 | { |
46 | 86 | ||
47 | /* Perform readentry(numb, buffer) system call. */ |
87 | /* Perform readentry(numb, buffer) system call. */ |
48 | 88 | ||
Line 91... | Line 131... | ||
91 | 131 | ||
92 | return r; |
132 | return r; |
93 | } |
133 | } |
94 | 134 | ||
95 | 135 | ||
- | 136 | /** |
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- | 137 | * } |
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- | 138 | */ |
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- | 139 |