From 2467cc55f139cf540dc1ed6da5f3774fcbab4475 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 12 Dec 2016 13:42:06 +0100
Subject: util-lib: read $SYSTEMD_PROC_CMDLINE if set when looking for the
 kernel cmdline

if we want to parse the kernel command line, let's check the
$SYSTEMD_PROC_CMDLINE environment variable first. This is useful for debugging
purposes.
---
 src/basic/proc-cmdline.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/basic')

diff --git a/src/basic/proc-cmdline.c b/src/basic/proc-cmdline.c
index 8297a222b7..98c94ed5e2 100644
--- a/src/basic/proc-cmdline.c
+++ b/src/basic/proc-cmdline.c
@@ -34,8 +34,22 @@
 #include "virt.h"
 
 int proc_cmdline(char **ret) {
+        const char *e;
         assert(ret);
 
+        /* For testing purposes it is sometimes useful to be able to override what we consider /proc/cmdline to be */
+        e = secure_getenv("SYSTEMD_PROC_CMDLINE");
+        if (e) {
+                char *m;
+
+                m = strdup(e);
+                if (!m)
+                        return -ENOMEM;
+
+                *ret = m;
+                return 0;
+        }
+
         if (detect_container() > 0)
                 return get_process_cmdline(1, 0, false, ret);
         else
-- 
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