2.4.x: avoid resetting the SIGINT handler unconditionally #1814
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ignore (Go's runtime respects SIG_IGN, by not setting a handler). If the handler is reset unconditionally, no Go code can ask to be notified of Interrupt signal as the system default handler obviously knows nothing about Go code.
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This happens unconditionally inside
NewTeleportwhich makes any Go code using this to start an instance of teleport unable to trap SIGINT signal from a Go function.Avoid resetting the SIGINT handler if it has not actually been set to ignore (Go's runtime respects
SIG_IGN, btw, by not setting a handler).