export env variable in lxc_start

Let's export the 'container' variable and let init receive it as a kernel command line option. In the upstart init scripts, we can distinguish if we are in a container context or not. =============================================================================== # /dev/console - getty # # This service maintains a getty on /dev/console from the point the # system is started until it is shut down again. # It only runs in lxc containers. start on stopped rc RUNLEVEL=[2345] stop on runlevel [!2345] env container pre-start script [ "x$container" != "xlxc" ] && { stop; exit 0; } exit 0; end script respawn exec /sbin/getty -8 38400 /dev/console =============================================================================== Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

export env variable in lxc_start
3244e750 · Daniel Lezcano · Daniel Lezcano · 434d90db · 3244e750
Commit 3244e750 authored Jan 28, 2011 by Daniel Lezcano Committed by Daniel Lezcano Jan 28, 2011
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lxc_start.c src/lxc/lxc_start.c +5 -0

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--- a/src/lxc/lxc_start.c
+++ b/src/lxc/lxc_start.c
@@ -117,6 +117,11 @@ int main(int argc, char *argv[])
 			 my_args.progname, my_args.quiet))
 		return err;

+	if (putenv("container=lxc")) {
+		SYSERROR("failed to set environment variable");
+		return err;
+	}
+
 	/* rcfile is specified in the cli option */
 	if (my_args.rcfile)
 		rcfile = (char *)my_args.rcfile;