From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 23 Feb 2012 00:26:47 +0000 (-0500)
Subject: Implement CLONE_FILES compat layer with rfork
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=89831a7431103178268b5f1dccbf094e7c4f4095

Implement CLONE_FILES compat layer with rfork

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/src/common/compat/clone.h b/src/common/compat/clone.h
index 45eb37982..08aa10dcd 100644
--- a/src/common/compat/clone.h
+++ b/src/common/compat/clone.h
@@ -22,19 +22,20 @@
 
 #include <sched.h>
 
+static inline
+int lttng_clone_files(int (*fn)(void *), void *child_stack, void *arg)
+{
+	return clone(fn, child_stack, CLONE_FILES | SIGCHLD, arg);
+}
+
 #elif __FreeBSD__
 
 #include <unistd.h>
 
-#define CLONE_FILES 0
-
-#define clone(fct_ptr, child_stack, flags, arg, args...) \
-	compat_clone(fct_ptr, child_stack, flags, arg)
-
-int compat_clone(int (*fn)(void *), void *child_stack, int flags,
-		void *arg)
+static inline
+int lttng_clone_files(int (*fn)(void *), void *child_stack, void *arg)
 {
-	return -ENOSYS;
+	return rfork(RFPROC | RFTHREAD);
 }
 
 #else
diff --git a/src/common/runas.c b/src/common/runas.c
index bee107951..86db9b868 100644
--- a/src/common/runas.c
+++ b/src/common/runas.c
@@ -237,9 +237,8 @@ int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
 	 * Pointing to the middle of the stack to support architectures
 	 * where the stack grows up (HPPA).
 	 */
-	pid = clone(child_run_as, child_stack + (RUNAS_CHILD_STACK_SIZE / 2),
-		CLONE_FILES | SIGCHLD,
-		&run_as_data, NULL);
+	pid = lttng_clone_files(child_run_as, child_stack + (RUNAS_CHILD_STACK_SIZE / 2),
+		&run_as_data);
 	if (pid < 0) {
 		perror("clone");
 		ret = pid;