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sigtrap: Fix log messages, and ignore SIGHUP (#1993)

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This commit is contained in:
Matthew Holt 2018-01-26 22:24:11 -07:00
parent a76222f607
commit 106d62b067
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GPG Key ID: 2A349DD577D586A5
1 changed files with 12 additions and 11 deletions
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23
sigtrap_posix.go
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@ -25,8 +25,6 @@ import (
// trapSignalsPosix captures POSIX-only signals.
func trapSignalsPosix() {
signalToString := map[os.Signal]string{syscall.SIGHUP: "SIGHUP", syscall.SIGUSR1: "SIGUSR1"}
go func() {
sigchan := make(chan os.Signal, 1)
signal.Notify(sigchan, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGUSR1, syscall.SIGUSR2)
@ -34,15 +32,15 @@ func trapSignalsPosix() {
for sig := range sigchan {
switch sig {
case syscall.SIGQUIT:
log.Println("[INFO] SIGQUIT: Terminating process")
log.Println("[INFO] SIGQUIT: Quitting process immediately")
if PidFile != "" {
os.Remove(PidFile)
}
os.Exit(0)
case syscall.SIGTERM:
log.Println("[INFO] SIGTERM: Shutting down")
exitCode := executeShutdownCallbacks(signalToString[sig])
log.Println("[INFO] SIGTERM: Shutting down servers then terminating")
exitCode := executeShutdownCallbacks("SIGTERM")
err := Stop()
if err != nil {
log.Printf("[ERROR] SIGTERM stop: %v", err)
@ -53,25 +51,25 @@ func trapSignalsPosix() {
}
os.Exit(exitCode)
case syscall.SIGUSR1, syscall.SIGHUP:
log.Printf("[INFO] %s: Reloading", signalToString[sig])
case syscall.SIGUSR1:
log.Println("[INFO] SIGUSR1: Reloading")
// Start with the existing Caddyfile
caddyfileToUse, inst, err := getCurrentCaddyfile()
if err != nil {
log.Printf("[ERROR] %s: %v", signalToString[sig], err)
log.Printf("[ERROR] SIGUSR1: %v", err)
continue
}
if loaderUsed.loader == nil {
// This also should never happen
log.Printf("[ERROR] %s: no Caddyfile loader with which to reload Caddyfile", signalToString[sig])
log.Println("[ERROR] SIGUSR1: no Caddyfile loader with which to reload Caddyfile")
continue
}
// Load the updated Caddyfile
newCaddyfile, err := loaderUsed.loader.Load(inst.serverType)
if err != nil {
log.Printf("[ERROR] %s: loading updated Caddyfile: %v", signalToString[sig], err)
log.Printf("[ERROR] SIGUSR1: loading updated Caddyfile: %v", err)
continue
}
if newCaddyfile != nil {
@ -81,7 +79,7 @@ func trapSignalsPosix() {
// Kick off the restart; our work is done
_, err = inst.Restart(caddyfileToUse)
if err != nil {
log.Printf("[ERROR] %s: %v", signalToString[sig], err)
log.Printf("[ERROR] SIGUSR1: %v", err)
}
case syscall.SIGUSR2:
@ -89,6 +87,9 @@ func trapSignalsPosix() {
if err := Upgrade(); err != nil {
log.Printf("[ERROR] SIGUSR2: upgrading: %v", err)
}
case syscall.SIGHUP:
// ignore; this signal is sometimes sent outside of the user's control
}
}
}()