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add a callback before exit #35

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add a callback before exit #35

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659b668
add a callback before exit
davies Jan 18, 2021
3da5144
add a option to redirect stdout/stderr to a file
davies Jun 29, 2021
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4 changes: 4 additions & 0 deletions daemon.go
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ type DaemonAttr struct {
ProgramName string // child's os.Args[0]; copied from parent if empty
CaptureOutput bool // whether to capture stdout/stderr
Files []**os.File // files to keep open in the daemon
OnExit func(stage int) error
}

/*
Expand Down Expand Up @@ -209,6 +210,9 @@ func MakeDaemon(attrs *DaemonAttr) (io.Reader, io.Reader, error) {
return fatal(fmt.Errorf("can't create process %s: %s", procName, err))
}
proc.Release()
if attrs.OnExit != nil {
attrs.OnExit(stage)
}
os.Exit(0)
}

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