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From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Mon, 20 Jul 2015 20:44:00 +0200
Subject: [PATCH] bootstate: Add kernel option containing the system that is
started
This is useful to allow the userspace to determine which system
is actually started without dissecting the root= option.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
common/bootstate.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/common/bootstate.c b/common/bootstate.c
index 3dc18813064d..b0cb0183068a 100644
--- a/common/bootstate.c
+++ b/common/bootstate.c
@@ -753,12 +753,16 @@ int bootstate_bootchooser(char *name, unsigned flags, unsigned timeout)
}
while (true) {
- char *cmd;
+ char *cmd, *system;
ret = bootstate_get_target(bootstate, flags, &target);
if (ret)
return ret;
+ system = asprintf("bootstate.active=%s", target);
+ globalvar_add_simple("linux.bootargs.bootchooser", system);
+ free(system);
+
cmd = asprintf("boot %s", target);
free(target);
pr_info("%srunning: %s...\n",
@@ -766,6 +770,7 @@ int bootstate_bootchooser(char *name, unsigned flags, unsigned timeout)
if (!(flags & BOOTCHOOSER_FLAG_DRYRUN))
ret = run_command(cmd);
free(cmd);
+ globalvar_set_match("linux.bootargs.bootchooser", NULL);
if (flags & BOOTCHOOSER_FLAG_RETRY_WITH_DEC) {
flags |= BOOTCHOOSER_FLAG_ATTEMPTS_DEC;
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