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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>
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
//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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// 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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