add prctl / PR_SET_NO_NEW_PRIVS

Add java wrappers for prctl and PR_SET_NO_NEW_PRIVS.

Change-Id: I649a755ea9354b0290b25292bc65901b1528c1d5

7 files changed, 18 insertions, 0 deletions

diff --git a/luni/src/main/java/android/system/Os.java b/luni/src/main/java/android/system/Os.java
index 0ca22a9..d280ea8 100644
--- a/luni/src/main/java/android/system/Os.java
+++ b/luni/src/main/java/android/system/Os.java
@@ -112,6 +112,7 @@ public final class Os {
   public static FileDescriptor[] pipe() throws ErrnoException { return Libcore.os.pipe(); }
   public static int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException { return Libcore.os.poll(fds, timeoutMs); }
   public static void posix_fallocate(FileDescriptor fd, long offset, long length) throws ErrnoException { Libcore.os.posix_fallocate(fd, offset, length); }
+  public static int prctl(int option, long arg2, long arg3, long arg4, long arg5) throws ErrnoException { return Libcore.os.prctl(option, arg2, arg3, arg4, arg5); };
   public static int pread(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException { return Libcore.os.pread(fd, buffer, offset); }
   public static int pread(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException { return Libcore.os.pread(fd, bytes, byteOffset, byteCount, offset); }
   public static int pwrite(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException { return Libcore.os.pwrite(fd, buffer, offset); }
diff --git a/luni/src/main/java/android/system/OsConstants.java b/luni/src/main/java/android/system/OsConstants.java
index d751a18..3bf70f6 100644
--- a/luni/src/main/java/android/system/OsConstants.java
+++ b/luni/src/main/java/android/system/OsConstants.java
@@ -296,6 +296,7 @@ public final class OsConstants {
     public static final int POLLRDNORM = placeholder();
     public static final int POLLWRBAND = placeholder();
     public static final int POLLWRNORM = placeholder();
+    public static final int PR_SET_NO_NEW_PRIVS = placeholder();
     public static final int PROT_EXEC = placeholder();
     public static final int PROT_NONE = placeholder();
     public static final int PROT_READ = placeholder();
diff --git a/luni/src/main/java/libcore/io/ForwardingOs.java b/luni/src/main/java/libcore/io/ForwardingOs.java
index 3e63cf6..9a993c5 100644
--- a/luni/src/main/java/libcore/io/ForwardingOs.java
+++ b/luni/src/main/java/libcore/io/ForwardingOs.java
@@ -115,6 +115,7 @@ public class ForwardingOs implements Os {
     public FileDescriptor[] pipe() throws ErrnoException { return os.pipe(); }
     public int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException { return os.poll(fds, timeoutMs); }
     public void posix_fallocate(FileDescriptor fd, long offset, long length) throws ErrnoException { os.posix_fallocate(fd, offset, length); }
+    public int prctl(int option, long arg2, long arg3, long arg4, long arg5) throws ErrnoException { return os.prctl(option, arg2, arg3, arg4, arg5); };
     public int pread(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException { return os.pread(fd, buffer, offset); }
     public int pread(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException { return os.pread(fd, bytes, byteOffset, byteCount, offset); }
     public int pwrite(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException { return os.pwrite(fd, buffer, offset); }
diff --git a/luni/src/main/java/libcore/io/Os.java b/luni/src/main/java/libcore/io/Os.java
index 7a71261..e55ae5c 100644
--- a/luni/src/main/java/libcore/io/Os.java
+++ b/luni/src/main/java/libcore/io/Os.java
@@ -108,6 +108,7 @@ public interface Os {
     /* TODO: if we used the non-standard ppoll(2) behind the scenes, we could take a long timeout. */
     public int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException;
     public void posix_fallocate(FileDescriptor fd, long offset, long length) throws ErrnoException;
+    public int prctl(int option, long arg2, long arg3, long arg4, long arg5) throws ErrnoException;
     public int pread(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException;
     public int pread(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException;
     public int pwrite(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException;
diff --git a/luni/src/main/java/libcore/io/Posix.java b/luni/src/main/java/libcore/io/Posix.java
index c2dccce..8d99f5e 100644
--- a/luni/src/main/java/libcore/io/Posix.java
+++ b/luni/src/main/java/libcore/io/Posix.java
@@ -109,6 +109,7 @@ public final class Posix implements Os {
     public native FileDescriptor[] pipe() throws ErrnoException;
     public native int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException;
     public native void posix_fallocate(FileDescriptor fd, long offset, long length) throws ErrnoException;
+    public native int prctl(int option, long arg2, long arg3, long arg4, long arg5) throws ErrnoException;
     public int pread(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException {
         if (buffer.isDirect()) {
             return preadBytes(fd, buffer, buffer.position(), buffer.remaining(), offset);
diff --git a/luni/src/main/native/android_system_OsConstants.cpp b/luni/src/main/native/android_system_OsConstants.cpp
index bfba1a9..cc3054a 100644
--- a/luni/src/main/native/android_system_OsConstants.cpp
+++ b/luni/src/main/native/android_system_OsConstants.cpp
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/prctl.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
@@ -361,6 +362,9 @@ static void OsConstants_initConstants(JNIEnv* env, jclass c) {
     initConstant(env, c, "POLLRDNORM", POLLRDNORM);
     initConstant(env, c, "POLLWRBAND", POLLWRBAND);
     initConstant(env, c, "POLLWRNORM", POLLWRNORM);
+#if defined(PR_SET_NO_NEW_PRIVS)
+    initConstant(env, c, "PR_SET_NO_NEW_PRIVS", PR_SET_NO_NEW_PRIVS);
+#endif
     initConstant(env, c, "PROT_EXEC", PROT_EXEC);
     initConstant(env, c, "PROT_NONE", PROT_NONE);
     initConstant(env, c, "PROT_READ", PROT_READ);
diff --git a/luni/src/main/native/libcore_io_Posix.cpp b/luni/src/main/native/libcore_io_Posix.cpp
index 7fcec29..db1a886 100644
--- a/luni/src/main/native/libcore_io_Posix.cpp
+++ b/luni/src/main/native/libcore_io_Posix.cpp
@@ -44,6 +44,7 @@
 #include <stdlib.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/prctl.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/syscall.h>
@@ -1076,6 +1077,13 @@ static void Posix_posix_fallocate(JNIEnv* env, jobject, jobject javaFd, jlong of
     }
 }
 
+static jint Posix_prctl(JNIEnv* env, jobject, jint option, jlong arg2, jlong arg3, jlong arg4, jlong arg5) {
+    int result = prctl(static_cast<int>(option),
+                       static_cast<unsigned long>(arg2), static_cast<unsigned long>(arg3),
+                       static_cast<unsigned long>(arg4), static_cast<unsigned long>(arg5));
+    return throwIfMinusOne(env, "prctl", result);
+}
+
 static jint Posix_preadBytes(JNIEnv* env, jobject, jobject javaFd, jobject javaBytes, jint byteOffset, jint byteCount, jlong offset) {
     ScopedBytesRW bytes(env, javaBytes);
     if (bytes.get() == NULL) {
@@ -1542,6 +1550,7 @@ static JNINativeMethod gMethods[] = {
     NATIVE_METHOD(Posix, pipe, "()[Ljava/io/FileDescriptor;"),
     NATIVE_METHOD(Posix, poll, "([Landroid/system/StructPollfd;I)I"),
     NATIVE_METHOD(Posix, posix_fallocate, "(Ljava/io/FileDescriptor;JJ)V"),
+    NATIVE_METHOD(Posix, prctl, "(IJJJJ)I"),
     NATIVE_METHOD(Posix, preadBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"),
     NATIVE_METHOD(Posix, pwriteBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;IIJ)I"),
     NATIVE_METHOD(Posix, readBytes, "(Ljava/io/FileDescriptor;Ljava/lang/Object;II)I"),