/**
* Handles post-fork cleanup of parent proc
*
* @param pid != 0; pid of child if > 0 or indication of failed fork if < 0;
* @param descriptors null-ok; file descriptors for child's new stdio if specified.
* @param pipeFd null-ok; pipe for communication with child.
* @param parsedArgs non-null; zygote args
* @return true for "exit command loop" and false for "continue command loop"
*/
private boolean handleParentProc(
int pid, FileDescriptor[] descriptors, FileDescriptor pipeFd, Arguments parsedArgs) {
if (pid > 0) {
setChildPgid(pid);
}
if (descriptors != null) {
for (FileDescriptor fd : descriptors) {
IoUtils.closeQuietly(fd);
}
}
boolean usingWrapper = false;
if (pipeFd != null && pid > 0) {
DataInputStream is = new DataInputStream(new FileInputStream(pipeFd));
int innerPid = -1;
try {
innerPid = is.readInt();
} catch (IOException ex) {
Log.w(TAG, "Error reading pid from wrapped process, child may have died", ex);
} finally {
try {
is.close();
} catch (IOException ex) {
}
}
// Ensure that the pid reported by the wrapped process is either the
// child process that we forked, or a descendant of it.
if (innerPid > 0) {
int parentPid = innerPid;
while (parentPid > 0 && parentPid != pid) {
parentPid = Process.getParentPid(parentPid);
}
if (parentPid > 0) {
Log.i(TAG, "Wrapped process has pid " + innerPid);
pid = innerPid;
usingWrapper = true;
} else {
Log.w(
TAG,
"Wrapped process reported a pid that is not a child of "
+ "the process that we forked: childPid="
+ pid
+ " innerPid="
+ innerPid);
}
}
}
try {
mSocketOutStream.writeInt(pid);
mSocketOutStream.writeBoolean(usingWrapper);
} catch (IOException ex) {
Log.e(TAG, "Error reading from command socket", ex);
return true;
}
/*
* If the peer wants to use the socket to wait on the
* newly spawned process, then we're all done.
*/
if (parsedArgs.peerWait) {
try {
mSocket.close();
} catch (IOException ex) {
Log.e(TAG, "Zygote: error closing sockets", ex);
}
return true;
}
return false;
}
