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lock.go: fix race condition 

Fix a race condition between startChild() and killChild() that could
lead to an orphaned managed process.

Fixes #1155
This commit is contained in:
Michael S. Fischer 2015-08-05 09:06:51 -07:00
parent 9a9cc9341b
commit 6875e8d6b4
1 changed files with 3 additions and 2 deletions
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3
command/lock.go
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@ -268,13 +268,14 @@ func (c *LockCommand) startChild(script string, doneCh chan struct{}) error {
cmd.Stderr = os.Stderr
// Start the child process
c.childLock.Lock()
if err := cmd.Start(); err != nil {
c.Ui.Error(fmt.Sprintf("Error starting handler: %s", err))
c.childLock.Unlock()
return err
}
// Setup the child info
c.childLock.Lock()
c.child = cmd.Process
c.childLock.Unlock()