自己公司网站维护,织梦网站图标,wordpress icon设置,高碑店做网站的公司一.ROOT简介
ROOT权限是Linux和Unix系统中的超级管理员用户帐户#xff0c;该帐户拥有整个系统的最高权利#xff0c;可以执行几乎所有操作。ROOT就是获取安卓系统中的最高用户权限#xff0c;以便执行一些需要高权限才能执行的操作(包括卸载系统自带程序、刷机、备份、还原…一.ROOT简介
ROOT权限是Linux和Unix系统中的超级管理员用户帐户该帐户拥有整个系统的最高权利可以执行几乎所有操作。ROOT就是获取安卓系统中的最高用户权限以便执行一些需要高权限才能执行的操作(包括卸载系统自带程序、刷机、备份、还原等)。
二.android root 原理
android root原理说明获取Root权限你就能控制系统的一切甚至还可以执行rm -rf /一般情况下如何切换到Root用户呢在大多数的Linux发行版中在终端输入su就可以进入Root用户当然如果Root用户有密码你必须输入密码才能切换过去。
三.添加ROOT权限
需要编译userdebug版本
关闭selinux
修改
diff --git a/init/selinux.cpp b/init/selinux.cpp
index 86238b430..8532dfa3c 100644
--- a/init/selinux.cppb/init/selinux.cpp-97,6 97,7 EnforcingStatus StatusFromCmdline() {}bool IsEnforcing() {return false;if (ALLOW_PERMISSIVE_SELINUX) {return StatusFromCmdline() SELINUX_ENFORCING;}
修改su.cpp注释用户组权限检测 修改
diff --git a/su/su.cpp b/su/su.cpp
index 1a1ab6bf..c2a30c84 100644
--- a/su/su.cppb/su/su.cpp-80,8 80,8 void extract_uidgids(const char* uidgids, uid_t* uid, gid_t* gid, gid_t* gids, i}int main(int argc, char** argv) {
- uid_t current_uid getuid();
- if (current_uid ! AID_ROOT current_uid ! AID_SHELL) error(1, 0, not allowed);
// uid_t current_uid getuid();
// if (current_uid ! AID_ROOT current_uid ! AID_SHELL) error(1, 0, not allowed);// Handle -h and --help.argv;
修改su文件默认权限 修改
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index a5f4f0e55..a44845ff7 100644
--- a/libcutils/fs_config.cppb/libcutils/fs_config.cpp-197,7 197,7 static const struct fs_path_config android_files[] {// the following two files are INTENTIONALLY set-uid, but they// are NOT included on user builds.{ 06755, AID_ROOT, AID_ROOT, 0, system/xbin/procmem },
- { 04750, AID_ROOT, AID_SHELL, 0, system/xbin/su },{ 06755, AID_ROOT, AID_SHELL, 0, system/xbin/su },// the following files have enhanced capabilities and ARE included// in user builds. 修改
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 82c27f02ba8..8dadfada5f8 100644
--- a/core/jni/com_android_internal_os_Zygote.cppb/core/jni/com_android_internal_os_Zygote.cpp-540,6 540,7 static void EnableKeepCapabilities(fail_fn_t fail_fn) {}static void DropCapabilitiesBoundingSet(fail_fn_t fail_fn) {
/* for (int i 0; prctl(PR_CAPBSET_READ, i, 0, 0, 0) 0; i) {;if (prctl(PR_CAPBSET_DROP, i, 0, 0, 0) -1) {if (errno EINVAL) {-550,6 551,7 static void DropCapabilitiesBoundingSet(fail_fn_t fail_fn) {}}}*/} 修改
diff --git a/security/commoncap.c b/security/commoncap.c
index 3023b4ad38a7..66acff91756d 100644
--- a/security/commoncap.cb/security/commoncap.c-1146,12 1146,12 int cap_task_setnice(struct task_struct *p, int nice)static int cap_prctl_drop(unsigned long cap){struct cred *new;
-
/*if (!ns_capable(current_user_ns(), CAP_SETPCAP))return -EPERM;if (!cap_valid(cap))return -EINVAL;
-
*/new prepare_creds();if (!new)return -ENOMEM;
