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941a6d0c05
It makes no sense to forward it, SIGSTOP cannot be handled by userspace (like SIGKILL) and it didn't do anything before so this just makes it more explicit. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
//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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// SIGSTOP cannot be ignored/forwarded by userspace.
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switch s {
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case syscall.SIGCHLD, syscall.SIGPIPE, syscall.SIGURG, syscall.SIGSTOP:
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return true
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default:
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return false
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}
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}
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