From 89f2cda5ecf736153ee7904480c13bb89526c610 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 18 Nov 2017 23:06:20 -0500
Subject: [PATCH] vunshare: add docs

---
 vunshare.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/vunshare.c b/vunshare.c
index 2e7efbb..85801fc 100644
--- a/vunshare.c
+++ b/vunshare.c
@@ -4,7 +4,6 @@
  */
 
 /* TODO:
- * - Add userns support.
  * - Make pidns init optional.
  * - Make setproctitle nicer and include program argv[0].
  * - Set up prctl(PR_SET_PDEATHSIG).
@@ -288,7 +287,18 @@ static const struct option opts[] = {
 
 static void usage(void)
 {
-	puts("Usage: unshare [options] <program>");
+	puts(
+		"Usage: unshare [options] <program>\n"
+		"\n"
+		"Options: [DimnpuU]\n"
+		"  -i   Use IPC namespaces\n"
+		"  -m   Use mount namespaces\n"
+		"  -n   Use net namespaces\n"
+		"  -p   Use pid namespaces\n"
+		"  -u   Use UTS namespaces\n"
+		"  -U   Use user namespaces\n"
+		"  -D   Daemonize program"
+	);
 	exit(EX_USAGE);
 }
 
-- 
2.39.5