podman

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//go:build aix || darwin || dragonfly || freebsd || netbsd || openbsd || solaris || zos
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// Signal handling for Linux only.
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package signal
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import (
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	"syscall"
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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
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)
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// SignalMap is a map of Linux signals.
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// These constants are sourced from the Linux version of golang.org/x/sys/unix
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// (I don't see much risk of this changing).
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// This should work as long as Podman only runs containers on Linux, which seems
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// a safe assumption for now.
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var SignalMap = map[string]syscall.Signal{
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	"ABRT":     syscall.Signal(0x6),
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	"ALRM":     syscall.Signal(0xe),
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	"BUS":      syscall.Signal(0x7),
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	"CHLD":     syscall.Signal(0x11),
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	"CLD":      syscall.Signal(0x11),
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	"CONT":     syscall.Signal(0x12),
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	"FPE":      syscall.Signal(0x8),
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	"HUP":      syscall.Signal(0x1),
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	"ILL":      syscall.Signal(0x4),
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	"INT":      syscall.Signal(0x2),
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	"IO":       syscall.Signal(0x1d),
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	"IOT":      syscall.Signal(0x6),
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	"KILL":     syscall.Signal(0x9),
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	"PIPE":     syscall.Signal(0xd),
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	"POLL":     syscall.Signal(0x1d),
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	"PROF":     syscall.Signal(0x1b),
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	"PWR":      syscall.Signal(0x1e),
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	"QUIT":     syscall.Signal(0x3),
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	"SEGV":     syscall.Signal(0xb),
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	"STKFLT":   syscall.Signal(0x10),
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	"STOP":     syscall.Signal(0x13),
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	"SYS":      syscall.Signal(0x1f),
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	"TERM":     syscall.Signal(0xf),
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	"TRAP":     syscall.Signal(0x5),
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	"TSTP":     syscall.Signal(0x14),
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	"TTIN":     syscall.Signal(0x15),
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	"TTOU":     syscall.Signal(0x16),
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	"URG":      syscall.Signal(0x17),
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	"USR1":     syscall.Signal(0xa),
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	"USR2":     syscall.Signal(0xc),
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	"VTALRM":   syscall.Signal(0x1a),
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	"WINCH":    syscall.Signal(0x1c),
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	"XCPU":     syscall.Signal(0x18),
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	"XFSZ":     syscall.Signal(0x19),
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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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