podman

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//go:build linux && !mips && !mipsle && !mips64 && !mips64le
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// Signal handling for Linux only.
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package signal
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// Copyright 2013-2018 Docker, Inc.
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// NOTE: this package has originally been copied from github.com/docker/docker.
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import (
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	"syscall"
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	"golang.org/x/sys/unix"
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)
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const (
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	sigrtmin = 34
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	sigrtmax = 64
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	SIGWINCH = syscall.SIGWINCH // For cross-compilation with Windows
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)
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// SignalMap is a map of Linux signals.
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var SignalMap = map[string]syscall.Signal{
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	"ABRT":     unix.SIGABRT,
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	"ALRM":     unix.SIGALRM,
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	"BUS":      unix.SIGBUS,
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	"CHLD":     unix.SIGCHLD,
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	"CLD":      unix.SIGCLD,
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	"CONT":     unix.SIGCONT,
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	"FPE":      unix.SIGFPE,
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	"HUP":      unix.SIGHUP,
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	"ILL":      unix.SIGILL,
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	"INT":      unix.SIGINT,
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	"IO":       unix.SIGIO,
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	"IOT":      unix.SIGIOT,
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	"KILL":     unix.SIGKILL,
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	"PIPE":     unix.SIGPIPE,
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	"POLL":     unix.SIGPOLL,
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	"PROF":     unix.SIGPROF,
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	"PWR":      unix.SIGPWR,
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	"QUIT":     unix.SIGQUIT,
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	"SEGV":     unix.SIGSEGV,
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	"STKFLT":   unix.SIGSTKFLT,
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	"STOP":     unix.SIGSTOP,
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	"SYS":      unix.SIGSYS,
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	"TERM":     unix.SIGTERM,
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	"TRAP":     unix.SIGTRAP,
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	"TSTP":     unix.SIGTSTP,
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	"TTIN":     unix.SIGTTIN,
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	"TTOU":     unix.SIGTTOU,
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	"URG":      unix.SIGURG,
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	"USR1":     unix.SIGUSR1,
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	"USR2":     unix.SIGUSR2,
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	"VTALRM":   unix.SIGVTALRM,
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	"WINCH":    unix.SIGWINCH,
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	"XCPU":     unix.SIGXCPU,
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	"XFSZ":     unix.SIGXFSZ,
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	"RTMIN":    sigrtmin,
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	"RTMIN+1":  sigrtmin + 1,
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	"RTMIN+2":  sigrtmin + 2,
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	"RTMIN+3":  sigrtmin + 3,
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	"RTMIN+4":  sigrtmin + 4,
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	"RTMIN+5":  sigrtmin + 5,
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	"RTMIN+6":  sigrtmin + 6,
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	"RTMIN+7":  sigrtmin + 7,
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	"RTMIN+8":  sigrtmin + 8,
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	"RTMIN+9":  sigrtmin + 9,
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	"RTMIN+10": sigrtmin + 10,
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	"RTMIN+11": sigrtmin + 11,
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	"RTMIN+12": sigrtmin + 12,
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	"RTMIN+13": sigrtmin + 13,
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	"RTMIN+14": sigrtmin + 14,
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	"RTMIN+15": sigrtmin + 15,
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	"RTMAX-14": sigrtmax - 14,
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	"RTMAX-13": sigrtmax - 13,
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	"RTMAX-12": sigrtmax - 12,
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	"RTMAX-11": sigrtmax - 11,
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	"RTMAX-10": sigrtmax - 10,
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	"RTMAX-9":  sigrtmax - 9,
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	"RTMAX-8":  sigrtmax - 8,
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	"RTMAX-7":  sigrtmax - 7,
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	"RTMAX-6":  sigrtmax - 6,
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	"RTMAX-5":  sigrtmax - 5,
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	"RTMAX-4":  sigrtmax - 4,
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	"RTMAX-3":  sigrtmax - 3,
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	"RTMAX-2":  sigrtmax - 2,
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	"RTMAX-1":  sigrtmax - 1,
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	"RTMAX":    sigrtmax,
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}
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// IsSignalIgnoredBySigProxy determines whether sig-proxy should ignore syscall signal
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func IsSignalIgnoredBySigProxy(s syscall.Signal) bool {
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	// Ignore SIGCHLD and SIGPIPE - these are most likely intended for the podman command itself.
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	// SIGURG was added because of golang 1.14 and its preemptive changes causing more signals to "show up".
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	// https://github.com/containers/podman/issues/5483
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	return s == syscall.SIGCHLD || s == syscall.SIGPIPE || s == syscall.SIGURG
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}
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