From 7801356442578ff6e1c65844eb9e65c819af4660 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Mon, 15 Jul 2013 23:04:52 -0400
Subject: [PATCH] build-sys: discover the path to kexec during build time

https://bugs.freedesktop.org/show_bug.cgi?id=55248
---
 Makefile.am               | 1 +
 configure.ac              | 2 ++
 src/core/shutdown.c       | 2 +-
 src/login/logind-action.c | 2 +-
 4 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 9105274c0da..44cfd3ea1cf 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -165,6 +165,7 @@ AM_CPPFLAGS = \
 	-DUDEVLIBEXECDIR=\"$(udevlibexecdir)\" \
 	-DPOLKIT_AGENT_BINARY_PATH=\"$(bindir)/pkttyagent\" \
 	-DQUOTACHECK=\"$(QUOTACHECK)\" \
+	-DKEXEC=\"$(KEXEC)\" \
 	-I $(top_srcdir)/src \
 	-I $(top_srcdir)/src/shared \
 	-I $(top_srcdir)/src/login \
diff --git a/configure.ac b/configure.ac
index 6f5fee5fcfe..94afe51d74b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,6 +76,8 @@ AC_PATH_PROG([KILL], [kill], [/usr/bin/kill])
 
 AC_PATH_PROG([KMOD], [kmod], [/usr/bin/kmod])
 
+AC_PATH_PROG([KEXEC], [kexec], [/usr/sbin/kexec])
+
 # gtkdocize greps for '^GTK_DOC_CHECK', so it needs to be on its own line
 m4_ifdef([GTK_DOC_CHECK], [
 GTK_DOC_CHECK([1.18],[--flavour no-tmpl])],
diff --git a/src/core/shutdown.c b/src/core/shutdown.c
index 10a52bd1175..4709746de40 100644
--- a/src/core/shutdown.c
+++ b/src/core/shutdown.c
@@ -318,7 +318,7 @@ int main(int argc, char *argv[]) {
                                 log_warning("kexec failed. Falling back to normal reboot.");
                         } else {
                                 /* Child */
-                                const char *args[3] = { "/sbin/kexec", "-e", NULL };
+                                const char *args[3] = { KEXEC, "-e", NULL };
                                 execv(args[0], (char * const *) args);
                                 return EXIT_FAILURE;
                         }
diff --git a/src/login/logind-action.c b/src/login/logind-action.c
index c930591023f..74114ee0a12 100644
--- a/src/login/logind-action.c
+++ b/src/login/logind-action.c
@@ -81,7 +81,7 @@ int manager_handle_action(
         else if (handle == HANDLE_HYBRID_SLEEP)
                 supported = can_sleep("hybrid-sleep") > 0;
         else if (handle == HANDLE_KEXEC)
-                supported = access("/sbin/kexec", X_OK) >= 0;
+                supported = access(KEXEC, X_OK) >= 0;
         else
                 supported = true;