1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "proc_fs.h"
33
34 #include <stdio.h>
35 #include <sys/mount.h>
36 #include <sys/statfs.h>
37
38 #include "fs/mount.h"
39 #include "internal.h"
40
ShowType(const char * devPoint,const char * mountPoint,struct statfs * statBuf,void * arg)41 static int ShowType(const char *devPoint, const char *mountPoint, struct statfs *statBuf, void *arg)
42 {
43 struct SeqBuf *seqBuf = (struct SeqBuf *)arg;
44 char *type = NULL;
45
46 switch (statBuf->f_type) {
47 case PROCFS_MAGIC:
48 type = "proc";
49 break;
50 case JFFS2_SUPER_MAGIC:
51 type = "jffs2";
52 break;
53 case NFS_SUPER_MAGIC:
54 type = "nfs";
55 break;
56 case TMPFS_MAGIC:
57 type = "tmpfs";
58 break;
59 case MSDOS_SUPER_MAGIC:
60 type = "vfat";
61 break;
62 case ZPFS_MAGIC:
63 type = "zpfs";
64 break;
65 default:
66 return 0;
67 }
68
69 if (strlen(devPoint) == 0) {
70 (void)LosBufPrintf(seqBuf, "%s %s %s %s %d %d\n", type, mountPoint, type, "()", 0, 0);
71 } else {
72 (void)LosBufPrintf(seqBuf, "%s %s %s %s %d %d\n", devPoint, mountPoint, type, "()", 0, 0);
73 }
74
75 return 0;
76 }
77
MountsProcFill(struct SeqBuf * m,void * v)78 static int MountsProcFill(struct SeqBuf *m, void *v)
79 {
80 foreach_mountpoint_t handler = ShowType;
81 (void)foreach_mountpoint(handler, (void *)m);
82
83 return 0;
84 }
85
86 static const struct ProcFileOperations MOUNTS_PROC_FOPS = {
87 .read = MountsProcFill,
88 };
89
ProcMountsInit(void)90 void ProcMountsInit(void)
91 {
92 struct ProcDirEntry *pde = CreateProcEntry("mounts", 0, NULL);
93 if (pde == NULL) {
94 PRINT_ERR("create mounts error!\n");
95 return;
96 }
97
98 pde->procFileOps = &MOUNTS_PROC_FOPS;
99 }
100
101