Android关闭SLinux

调试Android的时候有时需要关闭Selinux验证问题。总结下关闭SELinux的方法。

adb shell getenforce    查看当前 Selinux 状态是 permissive(关闭)还是 enforce(打开)的    
adb shell setenforce 0    开Selinux：设置成模式permissive    
adb shell setenforce 1    关Selinux：设置成模式enforce   

代码：
 

diff --git a/alps/system/core/init/selinux.cpp b/alps/system/core/init/selinux.cpp
index ce8348e..1b87d60 100644
--- a/alps/system/core/init/selinux.cpp
+++ b/alps/system/core/init/selinux.cpp
@@ -104,6 +104,8 @@ EnforcingStatus StatusFromCmdline() {
 }
 
 bool IsEnforcing() {

+    return false;
+       
     if (ALLOW_PERMISSIVE_SELINUX) {
         return StatusFromCmdline() == SELINUX_ENFORCING;
     }

Android 10:

bool IsEnforcing() {
    {
        int fd(open("/mboot/selinux", O_RDONLY | O_CLOEXEC | O_BINARY));
        if (fd != -1) {
            char v = 0xff;
            if (read(fd, &v, 1) < 0)
                PLOG(ERROR) << "Failed to read /mboot/selinux";
            close(fd);
            LOG(WARNING) << "/mboot/selinux is " << v;
            return v == '1';
        }
    }
    + return false; //add to close selinux
    if (ALLOW_PERMISSIVE_SELINUX) {
        return StatusFromCmdline() == SELINUX_ENFORCING;
    }
    return true;
}

Android 9:

/system/core/init/selinux.cpp
 
bool IsEnforcing() {
+ return false; //add to close selinux
  if (ALLOW_PERMISSIVE_SELINUX) {
    return StatusFromCmdline() == SELINUX_ENFORCING;
   }
  return true;
}