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# Copyright 2016 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# Create sigtab.go from gen-sysinfo.go.
# This shell scripts creates the sigtab.go file, which maps signals to
# their dispositions. We generate a file so that we can build a
# composite literal that only refers to signals that are defined on
# this system.
# This script simply writes to standard output.
set -e
echo '// Generated by Do not edit.'
echo 'package runtime'
echo 'var sigtable = [...]sigTabT{'
# Handle signals valid on all Unix systems.
addsig() {
echo " $1: $2,"
# Get the signal number and add it to SIGLIST
signum=`grep "const $1 = " gen-sysinfo.go | sed -e 's/.* = //'`
if echo "$signum" | grep '^_SIG[A-Z0-9_]*$' >/dev/null 2>&1; then
# Recurse once to obtain signal number
# This is needed for some MIPS signals defined as aliases of other signals
signum=`grep "const $signum = " gen-sysinfo.go | sed -e 's/.* = //'`
echo ' 0: {0, "SIGNONE: no trap"},'
addsig _SIGHUP '{_SigNotify + _SigKill, "SIGHUP: terminal line hangup"}'
addsig _SIGINT '{_SigNotify + _SigKill, "SIGINT: interrupt"}'
addsig _SIGQUIT '{_SigNotify + _SigThrow, "SIGQUIT: quit"}'
addsig _SIGILL '{_SigThrow + _SigUnblock, "SIGILL: illegal instruction"}'
addsig _SIGTRAP '{_SigThrow + _SigUnblock, "SIGTRAP: trace trap"}'
addsig _SIGABRT '{_SigNotify + _SigThrow, "SIGABRT: abort"}'
addsig _SIGBUS '{_SigPanic + _SigUnblock, "SIGBUS: bus error"}'
addsig _SIGFPE '{_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"}'
addsig _SIGKILL '{0, "SIGKILL: kill"}'
addsig _SIGUSR1 '{_SigNotify, "SIGUSR1: user-defined signal 1"}'
addsig _SIGSEGV '{_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"}'
addsig _SIGUSR2 '{_SigNotify, "SIGUSR2: user-defined signal 2"}'
addsig _SIGPIPE '{_SigNotify, "SIGPIPE: write to broken pipe"}'
addsig _SIGALRM '{_SigNotify, "SIGALRM: alarm clock"}'
addsig _SIGTERM '{_SigNotify + _SigKill, "SIGTERM: termination"}'
addsig _SIGCHLD '{_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"}'
addsig _SIGCONT '{_SigNotify + _SigDefault, "SIGCONT: continue"}'
addsig _SIGSTOP '{0, "SIGSTOP: stop"}'
addsig _SIGTSTP '{_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"}'
addsig _SIGTTIN '{_SigNotify + _SigDefault, "SIGTTIN: background read from tty"}'
addsig _SIGTTOU '{_SigNotify + _SigDefault, "SIGTTOU: background write to tty"}'
addsig _SIGURG '{_SigNotify, "SIGURG: urgent condition on socket"}'
addsig _SIGXCPU '{_SigNotify, "SIGXCPU: cpu limit exceeded"}'
addsig _SIGXFSZ '{_SigNotify, "SIGXFSZ: file size limit exceeded"}'
addsig _SIGVTALRM '{_SigNotify, "SIGVTALRM: virtual alarm clock"}'
addsig _SIGPROF '{_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"}'
addsig _SIGWINCH '{_SigNotify, "SIGWINCH: window size change"}'
addsig _SIGSYS '{_SigThrow, "SIGSYS: bad system call"}'
# Handle signals that are not supported on all systems.
checksig() {
if grep "const $1 = " gen-sysinfo.go >/dev/null 2>&1 \
&& ! grep "const $1 = _SIG" gen-sysinfo.go > /dev/null 2>&1; then
addsig $1 "$2"
checksig _SIGSTKFLT '{_SigThrow + _SigUnblock, "SIGSTKFLT: stack fault"}'
checksig _SIGIO '{_SigNotify, "SIGIO: i/o now possible"}'
checksig _SIGPWR '{_SigNotify, "SIGPWR: power failure restart"}'
checksig _SIGEMT '{_SigThrow, "SIGEMT: emulate instruction executed"}'
checksig _SIGINFO '{_SigNotify, "SIGINFO: status request from keyboard"}'
checksig _SIGTHR '{_SigNotify, "SIGTHR: reserved"}'
checksig _SIGPOLL '{_SigNotify, "SIGPOLL: pollable event occurred"}'
checksig _SIGWAITING '{_SigNotify, "SIGWAITING: reserved signal no longer used by"}'
checksig _SIGLWP '{_SigNotify, "SIGLWP: reserved signal no longer used by"}'
checksig _SIGFREEZE '{_SigNotify, "SIGFREEZE: special signal used by CPR"}'
checksig _SIGTHAW '{_SigNotify, "SIGTHAW: special signal used by CPR"}'
checksig _SIGCANCEL '{_SigSetStack + _SigUnblock, "SIGCANCEL: reserved signal for thread cancellation"}'
checksig _SIGXRES '{_SigNotify, "SIGXRES: resource control exceeded"}'
checksig _SIGJVM1 '{_SigNotify, "SIGJVM1: reserved signal for Java Virtual Machine"}'
checksig _SIGJVM2 '{_SigNotify, "SIGJVM2: reserved signal for Java Virtual Machine"}'
checksig _SIGLOST ' {_SigNotify, "SIGLOST: resource lost (Sun); server died (GNU)"}'
# Special handling of signals 32 and 33 on GNU/Linux systems,
# because they are special to glibc.
if test "${GOOS}" = "linux"; then
echo ' 32: {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */'
echo ' 33: {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */'
if test "${GOOS}" = "aix"; then
# _NSIG = _NSIG32/_NSIG64 and _NSIG* = _SIGMAX* + 1
bits=`grep 'const _NSIG = _NSIG[0-9]*$' gen-sysinfo.go | sed -e 's/.* = _NSIG\([0-9]*\)/\1/'`
nsig=`grep "const _SIGMAX$bits = [0-9]*$" gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
nsig=`expr $nsig + 1`
nsig=`grep 'const _*NSIG = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
if test -z "$nsig"; then
if grep 'const _*NSIG = [ (]*_*SIGRTMAX + 1[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
rtmax=`grep 'const _*SIGRTMAX = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
if test -n "$rtmax"; then
nsig=`expr $rtmax + 1`
elif grep 'const _*SIGRTMAX = [ (]*_*SIGRTMIN[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
rtmin=`grep 'const _*SIGRTMIN = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
if test -n "$rtmin"; then
nsig=`expr $rtmin + 1`
if test -z "$nsig"; then
echo 1>&2 "could not determine number of signals"
exit 1
# Fill in the remaining signal numbers in sigtable
while test "$i" -lt "$nsig"; do
if ! echo $SIGLIST | grep "_${i}_" >/dev/null 2>&1; then
echo " $i: {_SigNotify, \"signal $i\"},"
i=`expr "$i" + 1`
echo '}'