1 /*
2 * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "device.h"
16
17 #include <errno.h>
18 #include <fcntl.h>
19 #include <sys/mount.h>
20 #include <sys/stat.h>
21 #include <sys/sysmacros.h>
22
23 #include <linux/major.h>
24 #include "init_log.h"
25
26 #define DEFAULT_RW_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
27 #define DEFAULT_NO_AUTHORITY_MODE (S_IWUSR | S_IRUSR)
28
MountBasicFs(void)29 void MountBasicFs(void)
30 {
31 if (mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755") != 0) {
32 INIT_LOGE("Mount tmpfs failed. %s", strerror(errno));
33 }
34 if (mount("tmpfs", "/mnt", "tmpfs", MS_NOSUID, "mode=0755") != 0) {
35 INIT_LOGE("Mount tmpfs failed. %s", strerror(errno));
36 }
37 if (mount(NULL, "/mnt", NULL, MS_SLAVE, NULL) != 0) {
38 INIT_LOGE("Mount tmpfs slave failed. %s", strerror(errno));
39 }
40 if (mkdir("/mnt/data", S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) {
41 INIT_LOGE("mkdir /mnt/data failed. %s", strerror(errno));
42 }
43 if (mount("tmpfs", "/mnt/data", "tmpfs", MS_NOSUID, "mode=0755") != 0) {
44 INIT_LOGE("Mount tmpfs failed. %s", strerror(errno));
45 }
46 if (mount(NULL, "/mnt/data", NULL, MS_SHARED, NULL) != 0) {
47 INIT_LOGE("Mount tmpfs shared failed. %s", strerror(errno));
48 }
49 if (mount("tmpfs", "/storage", "tmpfs", MS_NOEXEC | MS_NODEV| MS_NOSUID, "mode=0755") != 0) {
50 INIT_LOGE("Mount storage failed. %s", strerror(errno));
51 }
52 if (mkdir("/dev/pts", S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) != 0) {
53 INIT_LOGE("mkdir /dev/pts failed. %s", strerror(errno));
54 }
55 if (mount("devpts", "/dev/pts", "devpts", 0, NULL) != 0) {
56 INIT_LOGE("Mount devpts failed. %s", strerror(errno));
57 }
58 if (mount("proc", "/proc", "proc", 0, "gid=3009,hidepid=2") != 0) {
59 INIT_LOGE("Mount procfs failed. %s", strerror(errno));
60 }
61 if (mount("sysfs", "/sys", "sysfs", 0, NULL) != 0) {
62 INIT_LOGE("Mount sysfs failed. %s", strerror(errno));
63 }
64 if (mount("selinuxfs", "/sys/fs/selinux", "selinuxfs", 0, NULL) != 0) {
65 INIT_LOGE("Mount selinuxfs failed. %s", strerror(errno));
66 }
67 }
68
CreateDeviceNode(void)69 void CreateDeviceNode(void)
70 {
71 if (mknod("/dev/null", S_IFCHR | DEFAULT_RW_MODE, makedev(MEM_MAJOR, DEV_NULL_MINOR)) != 0) {
72 INIT_LOGE("Create /dev/null device node failed. %s", strerror(errno));
73 }
74 if (mknod("/dev/random", S_IFCHR | DEFAULT_RW_MODE, makedev(MEM_MAJOR, DEV_RANDOM_MINOR)) != 0) {
75 INIT_LOGE("Create /dev/random device node failed. %s", strerror(errno));
76 }
77
78 if (mknod("/dev/urandom", S_IFCHR | DEFAULT_RW_MODE, makedev(MEM_MAJOR, DEV_URANDOM_MINOR)) != 0) {
79 INIT_LOGE("Create /dev/urandom device node failed. %s", strerror(errno));
80 }
81 }
82
83