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initscripts: check if swapon/swapoff exists before executing them

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Not all built images contain swapon/swapoff, for instance, it is
configurable with or without them in busybox. So it'd better to check if
they exist or not before executing them.

Redirecting the potential errors to /dev/null is not good enough, which
might suppress the *real* errors.

(From OE-Core rev: 2cb1142710cc2beb762c4c2b8edd44d3a97dafa0)

Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ming Liu
2016-05-26 23:14:33 +02:00
committed by Richard Purdie
parent b426b2bc1a
commit f053b5fac3
3 changed files with 3 additions and 3 deletions
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meta/recipes-core/initscripts/initscripts-1.0/mountall.sh
+1 -1
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@@ -33,7 +33,7 @@ kill -USR1 1
# Execute swapon command again, in case we want to swap to
# a file on a now mounted filesystem.
#
swapon -a 2> /dev/null
[ -x /sbin/swapon ] && swapon -a
: exit 0