[PATCH 2/2] kern: make the parent of a task available via task_info

[Justus Winter]

XXX: this most likely subverts the security of your system. DO NOT
APPLY.

* include/mach/task_info.h (struct task_basic_info): Add parent_task.
* kern/task.c (task_info): Include a port to parent_task.
---
 include/mach/task_info.h |    2 ++
 kern/task.c              |    3 +++
 2 files changed, 5 insertions(+)

diff --git a/include/mach/task_info.h b/include/mach/task_info.h
index 5607178..dc520a9 100644
--- a/include/mach/task_info.h
+++ b/include/mach/task_info.h
@@ -37,6 +37,7 @@
 
 #include <mach/machine/vm_types.h>
 #include <mach/time_value.h>
+#include <mach/port.h>
 
 /*
  *     Generic information structure to allow for expansion.
@@ -61,6 +62,7 @@ struct task_basic_info {
        time_value_t    system_time;    /* total system run time for
                                           terminated threads */
        time_value_t    creation_time;  /* creation time stamp */
+       mach_port_t     parent_task;    /* parent of the task */
 };
 
 typedef struct task_basic_info         task_basic_info_data_t;
diff --git a/kern/task.c b/kern/task.c
index 0c0be99..4d98132 100644
--- a/kern/task.c
+++ b/kern/task.c
@@ -750,6 +750,9 @@ kern_return_t task_info(
                basic_info->system_time.microseconds
                                = task->total_system_time.microseconds;
                basic_info->creation_time = task->creation_time;
+               task_reference(task->parent_task);
+               basic_info->parent_task
+                               = convert_task_to_port(task->parent_task);
                task_unlock(task);
 
                if (*task_info_count > TASK_BASIC_INFO_COUNT)
-- 
1.7.10.4