From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Sat, 17 Oct 2015 23:34:03 +0000 (-0400)
Subject: Port: Implement prctl wrapper
X-Git-Tag: v2.8.0-rc1~272
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e1055edba0a6560e688827da9f0cf3b4b96789e0;p=lttng-tools.git

Port: Implement prctl wrapper

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/common/compat/Makefile.am b/src/common/compat/Makefile.am
index 9b1211701..e12422585 100644
--- a/src/common/compat/Makefile.am
+++ b/src/common/compat/Makefile.am
@@ -10,4 +10,4 @@ endif
 
 libcompat_la_SOURCES = poll.h fcntl.h endian.h mman.h \
 		socket.h compat-fcntl.c uuid.h tid.h \
-		getenv.h string.h $(COMPAT)
+		getenv.h string.h prctl.h $(COMPAT)
diff --git a/src/common/compat/prctl.h b/src/common/compat/prctl.h
new file mode 100644
index 000000000..39e7ec7a1
--- /dev/null
+++ b/src/common/compat/prctl.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2015 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _COMPAT_PRCTL_H
+#define _COMPAT_PRCTL_H
+
+#ifdef __linux__
+#include <sys/prctl.h>
+
+static inline
+int lttng_prctl(int option, unsigned long arg2, unsigned long arg3,
+		unsigned long arg4, unsigned long arg5)
+{
+	return prctl(option, arg2, arg3, arg4, arg5);
+}
+
+#else
+
+#ifndef PR_SET_NAME
+#define PR_SET_NAME 0
+#endif /* PR_SET_NAME */
+
+static inline
+int lttng_prctl(int option, unsigned long arg2, unsigned long arg3,
+		unsigned long arg4, unsigned long arg5)
+{
+	return -ENOSYS;
+}
+
+#endif /* __linux__ */
+
+#endif /* _COMPAT_PRCTL_H */
diff --git a/src/common/runas.c b/src/common/runas.c
index bc7356b6a..7e5743be1 100644
--- a/src/common/runas.c
+++ b/src/common/runas.c
@@ -31,11 +31,12 @@
 #include <sched.h>
 #include <sys/signal.h>
 #include <assert.h>
-#include <sys/prctl.h>
+#include <signal.h>
 
 #include <common/common.h>
 #include <common/utils.h>
 #include <common/compat/getenv.h>
+#include <common/compat/prctl.h>
 #include <common/sessiond-comm/unix.h>
 
 #include "runas.h"
@@ -323,8 +324,9 @@ int run_as_worker(struct run_as_worker *worker)
 	memset(worker->procname, 0, proc_orig_len);
 	strncpy(worker->procname, DEFAULT_RUN_AS_WORKER_NAME, proc_orig_len);
 
-	ret = prctl(PR_SET_NAME, DEFAULT_RUN_AS_WORKER_NAME, 0, 0, 0);
-	if (ret) {
+	ret = lttng_prctl(PR_SET_NAME,
+			(unsigned long) DEFAULT_RUN_AS_WORKER_NAME, 0, 0, 0);
+	if (ret && ret != -ENOSYS) {
 		/* Don't fail as this is not essential. */
 		PERROR("prctl PR_SET_NAME");
 		ret = 0;