linux-kernel - [PATCH v2 1/3] init/main.c: log arguments and environment passed to init

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Date:   Thu, 12 Dec 2019 13:00:21 -0500
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/3] init/main.c: log arguments and environment passed to init

Extend logging in `run_init_process` to also show the arguments and
environment that we are passing to init.

Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
---
 init/main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/init/main.c b/init/main.c
index 91f6ebb30ef0..4ebf4346a44c 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1042,8 +1042,16 @@ static void __init do_pre_smp_initcalls(void)
 
 static int run_init_process(const char *init_filename)
 {
+	const char *const *p;
+
 	argv_init[0] = init_filename;
 	pr_info("Run %s as init process\n", init_filename);
+	pr_debug("  with arguments:\n");
+	for (p = argv_init; *p; p++)
+		pr_debug("    %s\n", *p);
+	pr_debug("  with environment:\n");
+	for (p = envp_init; *p; p++)
+		pr_debug("    %s\n", *p);
 	return do_execve(getname_kernel(init_filename),
 		(const char __user *const __user *)argv_init,
 		(const char __user *const __user *)envp_init);
-- 
2.23.0