Based on 4b5d8d0f22ae61ceb45a25391354ba53b43ee992 Mon Sep 17 00:00:00 2001
From: Michal Schmidt <mschmidt@redhat.com>
Date: Thu, 6 Nov 2014 22:24:13 +0100
Subject: [PATCH] shutdown: fix arguments to /run/initramfs/shutdown

Our initrd interface specifies that the verb is in argv[1].
This is where systemd passes it to systemd-shutdown, but getopt
permutes argv[]. This confuses dracut's shutdown script:
  Shutdown called with argument '--log-level'. Rebooting!

getopt can be convinced to not permute argv[] by having '-' as the first
character of optstring. Let's use it. This requires changing the way
non-option arguments (in our case, the verb) are processed.

This fixes a bug where the system would reboot instead of powering off.
---
 src/core/shutdown.c |   24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

--- src/core/shutdown.c
+++ src/core/shutdown.c	2014-11-10 14:14:20.869519112 +0000
@@ -75,9 +75,9 @@ static int parse_argv(int argc, char *ar
         assert(argc >= 1);
         assert(argv);
 
-        opterr = 0;
-
-        while ((c = getopt_long(argc, argv, ":", options, NULL)) >= 0)
+        /* "-" prevents getopt from permuting argv[] and moving the verb away
+         * from argv[1]. Our interface to initrd promises it'll be there. */
+        while ((c = getopt_long(argc, argv, "-", options, NULL)) >= 0)
                 switch (c) {
 
                 case ARG_LOG_LEVEL:
@@ -115,27 +115,25 @@ static int parse_argv(int argc, char *ar
 
                         break;
 
-                case '?':
-                        log_error("Unknown option %s.", argv[optind-1]);
-                        return -EINVAL;
+                case '\001':
+                        if (!arg_verb)
+                                arg_verb = optarg;
+                        else
+                                log_error("Excess arguments, ignoring");
+                        break;
 
-                case ':':
-                        log_error("Missing argument to %s.", argv[optind-1]);
+                case '?':
                         return -EINVAL;
 
                 default:
                         assert_not_reached("Unhandled option code.");
                 }
 
-        if (optind >= argc) {
+        if (!arg_verb) {
                 log_error("Verb argument missing.");
                 return -EINVAL;
         }
 
-        arg_verb = argv[optind];
-
-        if (optind + 1 < argc)
-                log_error("Excess arguments, ignoring");
         return 0;
 }
 
