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1 #!/bin/sh
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2
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3 # Copyright 2016 The Go Authors. All rights reserved.
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4 # Use of this source code is governed by a BSD-style
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5 # license that can be found in the LICENSE file.
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6
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7 # Create sigtab.go from gen-sysinfo.go.
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8
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9 # This shell scripts creates the sigtab.go file, which maps signals to
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10 # their dispositions. We generate a file so that we can build a
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11 # composite literal that only refers to signals that are defined on
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12 # this system.
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13
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14 # This script simply writes to standard output.
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15
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16 set -e
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17
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18 echo '// Generated by mksigtab.sh. Do not edit.'
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19 echo
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20 echo 'package runtime'
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21 echo
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22 echo 'var sigtable = [...]sigTabT{'
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23
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24 SIGLIST=""
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25
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26 # Handle signals valid on all Unix systems.
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27
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28 addsig() {
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29 echo " $1: $2,"
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30 # Get the signal number and add it to SIGLIST
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31 signum=`grep "const $1 = " gen-sysinfo.go | sed -e 's/.* = //'`
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131
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32 if echo "$signum" | grep '^_SIG[A-Z0-9_]*$' >/dev/null 2>&1; then
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33 # Recurse once to obtain signal number
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34 # This is needed for some MIPS signals defined as aliases of other signals
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35 signum=`grep "const $signum = " gen-sysinfo.go | sed -e 's/.* = //'`
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36 fi
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37 SIGLIST=$SIGLIST"_${signum}_"
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38 }
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39
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40 echo ' 0: {0, "SIGNONE: no trap"},'
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41 addsig _SIGHUP '{_SigNotify + _SigKill, "SIGHUP: terminal line hangup"}'
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42 addsig _SIGINT '{_SigNotify + _SigKill, "SIGINT: interrupt"}'
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43 addsig _SIGQUIT '{_SigNotify + _SigThrow, "SIGQUIT: quit"}'
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44 addsig _SIGILL '{_SigThrow + _SigUnblock, "SIGILL: illegal instruction"}'
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45 addsig _SIGTRAP '{_SigThrow + _SigUnblock, "SIGTRAP: trace trap"}'
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46 addsig _SIGABRT '{_SigNotify + _SigThrow, "SIGABRT: abort"}'
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47 addsig _SIGBUS '{_SigPanic + _SigUnblock, "SIGBUS: bus error"}'
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48 addsig _SIGFPE '{_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"}'
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49 addsig _SIGKILL '{0, "SIGKILL: kill"}'
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50 addsig _SIGUSR1 '{_SigNotify, "SIGUSR1: user-defined signal 1"}'
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51 addsig _SIGSEGV '{_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"}'
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52 addsig _SIGUSR2 '{_SigNotify, "SIGUSR2: user-defined signal 2"}'
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53 addsig _SIGPIPE '{_SigNotify, "SIGPIPE: write to broken pipe"}'
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54 addsig _SIGALRM '{_SigNotify, "SIGALRM: alarm clock"}'
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55 addsig _SIGTERM '{_SigNotify + _SigKill, "SIGTERM: termination"}'
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56 addsig _SIGCHLD '{_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"}'
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57 addsig _SIGCONT '{_SigNotify + _SigDefault, "SIGCONT: continue"}'
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58 addsig _SIGSTOP '{0, "SIGSTOP: stop"}'
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59 addsig _SIGTSTP '{_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"}'
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60 addsig _SIGTTIN '{_SigNotify + _SigDefault, "SIGTTIN: background read from tty"}'
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61 addsig _SIGTTOU '{_SigNotify + _SigDefault, "SIGTTOU: background write to tty"}'
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62 addsig _SIGURG '{_SigNotify, "SIGURG: urgent condition on socket"}'
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63 addsig _SIGXCPU '{_SigNotify, "SIGXCPU: cpu limit exceeded"}'
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64 addsig _SIGXFSZ '{_SigNotify, "SIGXFSZ: file size limit exceeded"}'
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65 addsig _SIGVTALRM '{_SigNotify, "SIGVTALRM: virtual alarm clock"}'
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66 addsig _SIGPROF '{_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"}'
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67 addsig _SIGWINCH '{_SigNotify, "SIGWINCH: window size change"}'
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68 addsig _SIGSYS '{_SigThrow, "SIGSYS: bad system call"}'
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69
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70 # Handle signals that are not supported on all systems.
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71
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72 checksig() {
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73 if grep "const $1 = " gen-sysinfo.go >/dev/null 2>&1 \
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74 && ! grep "const $1 = _SIG" gen-sysinfo.go > /dev/null 2>&1; then
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75 addsig $1 "$2"
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76 fi
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77 }
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78
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79 checksig _SIGSTKFLT '{_SigThrow + _SigUnblock, "SIGSTKFLT: stack fault"}'
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80 checksig _SIGIO '{_SigNotify, "SIGIO: i/o now possible"}'
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81 checksig _SIGPWR '{_SigNotify, "SIGPWR: power failure restart"}'
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82 checksig _SIGEMT '{_SigThrow, "SIGEMT: emulate instruction executed"}'
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83 checksig _SIGINFO '{_SigNotify, "SIGINFO: status request from keyboard"}'
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84 checksig _SIGTHR '{_SigNotify, "SIGTHR: reserved"}'
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85 checksig _SIGPOLL '{_SigNotify, "SIGPOLL: pollable event occurred"}'
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86 checksig _SIGWAITING '{_SigNotify, "SIGWAITING: reserved signal no longer used by"}'
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87 checksig _SIGLWP '{_SigNotify, "SIGLWP: reserved signal no longer used by"}'
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88 checksig _SIGFREEZE '{_SigNotify, "SIGFREEZE: special signal used by CPR"}'
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89 checksig _SIGTHAW '{_SigNotify, "SIGTHAW: special signal used by CPR"}'
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90 checksig _SIGCANCEL '{_SigSetStack + _SigUnblock, "SIGCANCEL: reserved signal for thread cancellation"}'
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91 checksig _SIGXRES '{_SigNotify, "SIGXRES: resource control exceeded"}'
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92 checksig _SIGJVM1 '{_SigNotify, "SIGJVM1: reserved signal for Java Virtual Machine"}'
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93 checksig _SIGJVM2 '{_SigNotify, "SIGJVM2: reserved signal for Java Virtual Machine"}'
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94 checksig _SIGLOST ' {_SigNotify, "SIGLOST: resource lost (Sun); server died (GNU)"}'
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111
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95
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96 # Special handling of signals 32 and 33 on GNU/Linux systems,
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97 # because they are special to glibc.
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98 if test "${GOOS}" = "linux"; then
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99 SIGLIST=$SIGLIST"_32__33_"
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100 echo ' 32: {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */'
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101 echo ' 33: {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */'
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102 fi
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103
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104 if test "${GOOS}" = "aix"; then
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105 # _NSIG = _NSIG32/_NSIG64 and _NSIG* = _SIGMAX* + 1
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106 bits=`grep 'const _NSIG = _NSIG[0-9]*$' gen-sysinfo.go | sed -e 's/.* = _NSIG\([0-9]*\)/\1/'`
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107 nsig=`grep "const _SIGMAX$bits = [0-9]*$" gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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108 nsig=`expr $nsig + 1`
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109 else
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110 nsig=`grep 'const _*NSIG = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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111 if test -z "$nsig"; then
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112 if grep 'const _*NSIG = [ (]*_*SIGRTMAX + 1[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
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113 rtmax=`grep 'const _*SIGRTMAX = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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114 if test -n "$rtmax"; then
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115 nsig=`expr $rtmax + 1`
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116 elif grep 'const _*SIGRTMAX = [ (]*_*SIGRTMIN[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
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117 rtmin=`grep 'const _*SIGRTMIN = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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118 if test -n "$rtmin"; then
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119 nsig=`expr $rtmin + 1`
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120 fi
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111
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121 fi
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122 fi
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123 fi
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124 fi
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125
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126 if test -z "$nsig"; then
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127 echo 1>&2 "could not determine number of signals"
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128 exit 1
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129 fi
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130
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131 i=1
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132 # Fill in the remaining signal numbers in sigtable
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133 while test "$i" -lt "$nsig"; do
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134 if ! echo $SIGLIST | grep "_${i}_" >/dev/null 2>&1; then
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135 echo " $i: {_SigNotify, \"signal $i\"},"
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136 fi
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137 i=`expr "$i" + 1`
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138 done
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139 echo '}'
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