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| author | Kenneth Johansson <kenneth.johansson@inteno.se> | 2017-05-24 13:45:37 +0200 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2017-05-25 09:22:43 +0200 |
| commit | e96a9a9af82c00dcce606a84a7bb87a00411385d (patch) | |
| tree | f711519effca1b4dd68abc9168c227f4482e6448 | |
| parent | 8e0e0e7d8bfbe7befcaa453f0b4993605703a690 (diff) | |
| download | upstream-e96a9a9af82c00dcce606a84a7bb87a00411385d.tar.gz upstream-e96a9a9af82c00dcce606a84a7bb87a00411385d.tar.bz2 upstream-e96a9a9af82c00dcce606a84a7bb87a00411385d.zip | |
sysupgrade: run only one instance at a time.
Things do not work well if running multiple instances of
upgrade at the same time.
Signed-off-by: Kenneth Johansson <kenneth.johansson@inteno.se>
| -rwxr-xr-x | package/base-files/files/sbin/sysupgrade | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade index c095ca81c5..1eede14b05 100755 --- a/package/base-files/files/sbin/sysupgrade +++ b/package/base-files/files/sbin/sysupgrade @@ -47,6 +47,20 @@ while [ -n "$1" ]; do shift; done +# just one instance +if ! lock -n /tmp/sysupgrade.lock +then + echo "Another instance of sysupgrade already running" + echo "If you are sure this is wrong remove file /tmp/sysupgrade.lock" + exit 1 +fi + +# make sure the lock is removed when done even when killed +finish() { + lock -u /var/sysupgrade.lock +} +trap finish EXIT INT TERM + export CONFFILES=/tmp/sysupgrade.conffiles export CONF_TAR=/tmp/sysupgrade.tgz |