From 02bb6cda87189ce0be10e8daba5c781f5eb90634 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 23 Dec 2013 18:10:57 +0100
Subject: [PATCH] util: when we try to read /proc/cmdline in a container, read
 /proc/1/cmdline instead

---
 src/shared/util.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/shared/util.c b/src/shared/util.c
index 5c9d0bb73..8d7cf5398 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -5994,8 +5994,20 @@ int proc_cmdline(char **ret) {
         int r;
 
         if (detect_container(NULL) > 0) {
-                *ret = NULL;
-                return 0;
+                char *buf, *p;
+                size_t sz = 0;
+
+                r = read_full_file("/proc/1/cmdline", &buf, &sz);
+                if (r < 0)
+                        return r;
+
+                for (p = buf; p + 1 < buf + sz; p++)
+                        if (*p == 0)
+                                *p = ' ';
+
+                *p  = 0;
+                *ret = buf;
+                return 1;
         }
 
         r = read_one_line_file("/proc/cmdline", ret);
-- 
2.30.2