From 1359fffa573f42463e3b369df5e57b0c33821a61 Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Sun, 24 Jan 2016 16:08:36 +0100
Subject: shutdown: complain if process excluded from killing spree runs of the
 same rootfs as PID1

---
 src/basic/process-util.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/basic/process-util.c')

diff --git a/src/basic/process-util.c b/src/basic/process-util.c
index 4341d0093f..189ef9ab60 100644
--- a/src/basic/process-util.c
+++ b/src/basic/process-util.c
@@ -48,6 +48,7 @@
 #include "missing.h"
 #include "process-util.h"
 #include "signal-util.h"
+#include "stat-util.h"
 #include "string-table.h"
 #include "string-util.h"
 #include "user-util.h"
@@ -637,6 +638,17 @@ bool pid_is_alive(pid_t pid) {
         return true;
 }
 
+int pid_from_same_root_fs(pid_t pid) {
+        const char *root;
+
+        if (pid < 0)
+                return 0;
+
+        root = procfs_file_alloca(pid, "root");
+
+        return files_same(root, "/proc/1/root");
+}
+
 bool is_main_thread(void) {
         static thread_local int cached = 0;
 
-- 
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