mirror of https://github.com/octoleo/restic.git
84 lines
1.6 KiB
Go
84 lines
1.6 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/signal"
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"sync"
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"syscall"
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"github.com/restic/restic/internal/debug"
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)
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var cleanupHandlers struct {
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sync.Mutex
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list []func() error
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done bool
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ch chan os.Signal
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}
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var stderr = os.Stderr
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func init() {
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cleanupHandlers.ch = make(chan os.Signal)
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go CleanupHandler(cleanupHandlers.ch)
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signal.Notify(cleanupHandlers.ch, syscall.SIGINT)
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}
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// AddCleanupHandler adds the function f to the list of cleanup handlers so
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// that it is executed when all the cleanup handlers are run, e.g. when SIGINT
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// is received.
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func AddCleanupHandler(f func() error) {
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cleanupHandlers.Lock()
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defer cleanupHandlers.Unlock()
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// reset the done flag for integration tests
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cleanupHandlers.done = false
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cleanupHandlers.list = append(cleanupHandlers.list, f)
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}
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// RunCleanupHandlers runs all registered cleanup handlers
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func RunCleanupHandlers() {
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cleanupHandlers.Lock()
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defer cleanupHandlers.Unlock()
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if cleanupHandlers.done {
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return
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}
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cleanupHandlers.done = true
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for _, f := range cleanupHandlers.list {
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err := f()
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if err != nil {
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fmt.Fprintf(stderr, "error in cleanup handler: %v\n", err)
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}
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}
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cleanupHandlers.list = nil
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}
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// CleanupHandler handles the SIGINT signals.
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func CleanupHandler(c <-chan os.Signal) {
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for s := range c {
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debug.Log("signal %v received, cleaning up", s)
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fmt.Fprintf(stderr, "%ssignal %v received, cleaning up\n", ClearLine(), s)
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code := 0
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if s == syscall.SIGINT {
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code = 130
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} else {
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code = 1
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}
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Exit(code)
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}
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}
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// Exit runs the cleanup handlers and then terminates the process with the
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// given exit code.
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func Exit(code int) {
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RunCleanupHandlers()
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os.Exit(code)
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}
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