annotate liboctave/wrappers/signal-wrappers.c @ 31792:30b6a8be7128 stable

attempt to avoid race condition when initializing list of async signals * cxx-signal-helpers.cc: New file. Move (async_signals): New file-scope static const variable. (octave_block_async_signals, octave_unblock_async_signals, signal_watcher, octave_create_interrupt_watcher_thread): Move functions here from signal-wrappers.c. Use file-scope async_signals variable instead of calling octave_async_signals to get list of asynchronous signals. (init_async_signals): Rename from octave_async_signals and move here from signal-wrappers.cc. Return sigset_t object instead of pointer to static storage that is local to the function. * module.mk: Update.
author John W. Eaton <jwe@octave.org>
date Thu, 08 Dec 2022 13:57:18 -0500
parents 597f3ee61a48
children 0aa88d03fa50
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2016-2023 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 // These functions may be provided by gnulib. We don't include gnulib
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27 // headers directly in Octave's C++ source files to avoid problems that
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28 // may be caused by the way that gnulib overrides standard library
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29 // functions.
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30
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31 #if defined (HAVE_CONFIG_H)
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32 # include "config.h"
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33 #endif
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34
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35 #include <sys/types.h>
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36 #include <signal.h>
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37 #include <stdio.h>
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38 #include <stdlib.h>
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39 #include <string.h>
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40
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41 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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42 # include <windows.h>
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43 #else
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44 # include <pthread.h>
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45 #endif
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46
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47 #include "signal-wrappers.h"
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48
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49 int
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50 octave_kill_wrapper (pid_t pid, int signum)
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51 {
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52 #if defined (HAVE_KILL)
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53 return kill (pid, signum);
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54 #elif defined (HAVE_RAISE)
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55 octave_unused_parameter (pid);
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56
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57 return raise (signum);
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58 #else
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59 octave_unused_parameter (pid);
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60 octave_unused_parameter (signum);
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61
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62 return -1;
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63 #endif
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64 }
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65
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66 char *
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67 octave_strsignal_wrapper (int signum)
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68 {
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69 return strsignal (signum);
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70 }
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71
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72 bool
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73 octave_have_kill (void)
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74 {
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75 #if defined (HAVE_KILL)
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76 return true;
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77 #else
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78 return false;
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79 #endif
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80 }
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81
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82 bool
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83 octave_get_sig_number (const char *signame, int *signum)
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84 {
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85 *signum = -1;
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86
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87 // FIXME: this should probably use a perfect hash function.
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88
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89 if (! strcmp (signame, "SIGINT"))
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90 {
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91 #if defined (SIGINT)
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92 *signum = SIGINT;
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93 return true;
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94 #endif
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95 }
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96 else if (! strcmp (signame, "SIGBREAK"))
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97 {
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98 #if defined (SIGBREAK)
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99 *signum = SIGBREAK;
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100 return true;
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101 #endif
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102 }
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103 else if (! strcmp (signame, "SIGABRT"))
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104 {
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105 #if defined (SIGABRT)
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106 *signum = SIGABRT;
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107 return true;
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108 #endif
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109 }
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110 else if (! strcmp (signame, "SIGALRM"))
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111 {
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112 #if defined (SIGALRM)
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113 *signum = SIGALRM;
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114 return true;
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115 #endif
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116 }
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117 else if (! strcmp (signame, "SIGBUS"))
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118 {
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119 #if defined (SIGBUS)
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120 *signum = SIGBUS;
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121 return true;
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122 #endif
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123 }
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124 else if (! strcmp (signame, "SIGCHLD"))
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125 {
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126 #if defined (SIGCHLD)
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127 *signum = SIGCHLD;
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128 return true;
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129 #endif
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130 }
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131 else if (! strcmp (signame, "SIGCLD"))
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132 {
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133 #if defined (SIGCLD)
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134 *signum = SIGCLD;
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135 return true;
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136 #endif
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137 }
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138 else if (! strcmp (signame, "SIGCONT"))
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139 {
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140 #if defined (SIGCONT)
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141 *signum = SIGCONT;
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142 return true;
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143 #endif
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144 }
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145 else if (! strcmp (signame, "SIGEMT"))
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146 {
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147 #if defined (SIGEMT)
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148 *signum = SIGEMT;
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149 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
150 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
151 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
152 else if (! strcmp (signame, "SIGFPE"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
153 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
154 #if defined (SIGFPE)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
155 *signum = SIGFPE;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
156 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
157 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
158 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
159 else if (! strcmp (signame, "SIGHUP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
160 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
161 #if defined (SIGHUP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
162 *signum = SIGHUP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
163 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
164 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
165 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
166 else if (! strcmp (signame, "SIGILL"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
167 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
168 #if defined (SIGILL)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
169 *signum = SIGILL;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
170 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
171 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
172 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
173 else if (! strcmp (signame, "SIGINFO"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
174 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
175 #if defined (SIGINFO)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
176 *signum = SIGINFO;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
177 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
178 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
179 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
180 else if (! strcmp (signame, "SIGIOT"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
181 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
182 #if defined (SIGIOT)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
183 *signum = SIGIOT;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
184 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
185 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
186 }
27650
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
187 else if (! strcmp (signame, "SIGKILL"))
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
188 {
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
189 #if defined (SIGKILL)
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
190 *signum = SIGKILL;
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
191 return true;
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
192 #endif
2c8fc292ff2c include SIGKILL in the SIG structure of known signals (bug #57183)
Mike Miller <mtmiller@octave.org>
parents: 26379
diff changeset
193 }
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
194 else if (! strcmp (signame, "SIGLOST"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
195 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
196 #if defined (SIGLOST)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
197 *signum = SIGLOST;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
198 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
199 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
200 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
201 else if (! strcmp (signame, "SIGPIPE"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
202 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
203 #if defined (SIGPIPE)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
204 *signum = SIGPIPE;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
205 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
206 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
207 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
208 else if (! strcmp (signame, "SIGPOLL"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
209 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
210 #if defined (SIGPOLL)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
211 *signum = SIGPOLL;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
212 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
213 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
214 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
215 else if (! strcmp (signame, "SIGPROF"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
216 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
217 #if defined (SIGPROF)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
218 *signum = SIGPROF;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
219 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
220 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
221 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
222 else if (! strcmp (signame, "SIGPWR"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
223 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
224 #if defined (SIGPWR)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
225 *signum = SIGPWR;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
226 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
227 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
228 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
229 else if (! strcmp (signame, "SIGQUIT"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
230 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
231 #if defined (SIGQUIT)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
232 *signum = SIGQUIT;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
233 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
234 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
235 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
236 else if (! strcmp (signame, "SIGSEGV"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
237 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
238 #if defined (SIGSEGV)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
239 *signum = SIGSEGV;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
240 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
241 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
242 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
243 else if (! strcmp (signame, "SIGSTOP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
244 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
245 #if defined (SIGSTOP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
246 *signum = SIGSTOP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
247 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
248 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
249 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
250 else if (! strcmp (signame, "SIGSYS"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
251 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
252 #if defined (SIGSYS)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
253 *signum = SIGSYS;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
254 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
255 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
256 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
257 else if (! strcmp (signame, "SIGTERM"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
258 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
259 #if defined (SIGTERM)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
260 *signum = SIGTERM;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
261 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
262 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
263 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
264 else if (! strcmp (signame, "SIGTRAP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
265 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
266 #if defined (SIGTRAP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
267 *signum = SIGTRAP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
268 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
269 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
270 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
271 else if (! strcmp (signame, "SIGTSTP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
272 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
273 #if defined (SIGTSTP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
274 *signum = SIGTSTP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
275 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
276 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
277 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
278 else if (! strcmp (signame, "SIGTTIN"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
279 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
280 #if defined (SIGTTIN)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
281 *signum = SIGTTIN;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
282 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
283 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
284 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
285 else if (! strcmp (signame, "SIGTTOU"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
286 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
287 #if defined (SIGTTOU)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
288 *signum = SIGTTOU;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
289 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
290 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
291 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
292 else if (! strcmp (signame, "SIGURG"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
293 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
294 #if defined (SIGURG)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
295 *signum = SIGURG;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
296 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
297 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
298 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
299 else if (! strcmp (signame, "SIGUSR1"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
300 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
301 #if defined (SIGUSR1)
1d23b75cbcd1 hide signal.h from C++ sources
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302 *signum = SIGUSR1;
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303 return true;
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304 #endif
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305 }
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306 else if (! strcmp (signame, "SIGUSR2"))
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307 {
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308 #if defined (SIGUSR2)
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309 *signum = SIGUSR2;
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310 return true;
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311 #endif
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312 }
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313 else if (! strcmp (signame, "SIGVTALRM"))
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314 {
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315 #if defined (SIGVTALRM)
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316 *signum = SIGVTALRM;
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317 return true;
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318 #endif
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319 }
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320 else if (! strcmp (signame, "SIGIO"))
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321 {
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322 #if defined (SIGIO)
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323 *signum = SIGIO;
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324 return true;
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325 #endif
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326 }
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327 else if (! strcmp (signame, "SIGWINCH"))
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328 {
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329 #if defined (SIGWINCH)
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330 *signum = SIGWINCH;
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331 return true;
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332 #endif
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333 }
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334 else if (! strcmp (signame, "SIGXCPU"))
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335 {
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336 #if defined (SIGXCPU)
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337 *signum = SIGXCPU;
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338 return true;
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339 #endif
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340 }
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341 else if (! strcmp (signame, "SIGXFSZ"))
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342 {
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343 #if defined (SIGXFSZ)
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344 *signum = SIGXFSZ;
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345 return true;
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346 #endif
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347 }
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348
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349 return false;
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350 }
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351
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352 octave_sig_handler *
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353 octave_set_signal_handler_internal (int sig, octave_sig_handler *handler,
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354 bool restart_syscalls)
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355 {
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356 struct sigaction act, oact;
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357
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358 act.sa_handler = handler;
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359 act.sa_flags = 0;
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360
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361 #if defined (SIGALRM)
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362 if (sig == SIGALRM)
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363 {
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364 # if defined (SA_INTERRUPT)
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365 act.sa_flags |= SA_INTERRUPT;
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366 # endif
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367 }
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368 #endif
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369 #if defined (SA_RESTART)
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370 # if defined (SIGALRM)
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371 else
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372 # endif
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373 // FIXME: Do we also need to explicitly disable SA_RESTART?
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374 if (restart_syscalls)
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375 act.sa_flags |= SA_RESTART;
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376 #endif
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377
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378 sigemptyset (&act.sa_mask);
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379 sigemptyset (&oact.sa_mask);
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380
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381 sigaction (sig, &act, &oact);
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382
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383 return oact.sa_handler;
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384 }
1d23b75cbcd1 hide signal.h from C++ sources
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385
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386 octave_sig_handler *
1d23b75cbcd1 hide signal.h from C++ sources
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387 octave_set_signal_handler_by_name (const char *signame,
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388 octave_sig_handler *handler,
1d23b75cbcd1 hide signal.h from C++ sources
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389 bool restart_syscalls)
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390 {
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391 int sig;
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392
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393 return (octave_get_sig_number (signame, &sig)
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394 ? octave_set_signal_handler_internal (sig, handler, restart_syscalls)
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395 : 0);
1d23b75cbcd1 hide signal.h from C++ sources
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396 }
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397
24520
c5c11b07598a refactor signal handling (bug #52757)
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398 octave_sig_handler *
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
399 octave_set_default_signal_handler (int sig)
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
400 {
c5c11b07598a refactor signal handling (bug #52757)
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401 return octave_set_signal_handler_internal (sig, SIG_DFL, true);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
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diff changeset
402 }
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
403
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
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diff changeset
404 octave_sig_handler *
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
405 octave_set_default_signal_handler_by_name (const char *signame)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
406 {
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
407 return octave_set_signal_handler_by_name (signame, SIG_DFL, true);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
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diff changeset
408 }
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
409
21941
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diff changeset
410 int
1d23b75cbcd1 hide signal.h from C++ sources
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411 octave_num_signals (void)
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diff changeset
412 {
1d23b75cbcd1 hide signal.h from C++ sources
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413 return NSIG;
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
414 }
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
415
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
416 typedef struct
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
417 {
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diff changeset
418 sigset_t nvar;
1d23b75cbcd1 hide signal.h from C++ sources
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419 sigset_t ovar;
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420 } sigset_info;
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421
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
422 void *
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
423 octave_block_child (void)
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
424 {
24520
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
425 #if defined (SIGCHLD) || defined (SIGCLD)
21941
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426
1d23b75cbcd1 hide signal.h from C++ sources
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427 sigset_info *context = (sigset_info *) malloc (sizeof (sigset_info));
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diff changeset
428
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
429 if (context)
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
430 {
24520
c5c11b07598a refactor signal handling (bug #52757)
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diff changeset
431 sigemptyset (&(context->ovar));
21941
1d23b75cbcd1 hide signal.h from C++ sources
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432 sigemptyset (&(context->nvar));
24520
c5c11b07598a refactor signal handling (bug #52757)
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parents: 24118
diff changeset
433 #if defined (SIGCHLD)
21941
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
434 sigaddset (&(context->nvar), SIGCHLD);
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
435 #endif
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
436 #if defined (SIGCLD)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
437 sigaddset (&(context->nvar), SIGCLD);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
438 #endif
21941
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
439 sigprocmask (SIG_BLOCK, &(context->nvar), &(context->ovar));
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
440 }
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
441
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
442 return context;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
443
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
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diff changeset
444 #else
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
445
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
446 return 0;
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
447
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
448 #endif
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
449 }
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
450
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
451 void
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
452 octave_unblock_child (void *context_arg)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
453 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
454 if (context_arg)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
455 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
456 sigset_info *context = (sigset_info *) context_arg;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
457
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
458 sigprocmask (SIG_SETMASK, &(context->ovar), 0);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
459
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
460 free (context);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
461 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
462 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
463
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
464 static void
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
465 block_or_unblock_signal (int how, int sig)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
466 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
467 #if ! defined (__WIN32__) || defined (__CYGWIN__)
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
468
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
469 // Blocking/unblocking signals at thread level is only supported
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
470 // on platform with fully compliant POSIX threads. This is not
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
471 // supported on Win32. Moreover, we have to make sure that SIGINT
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
472 // handler is not installed before calling AllocConsole: installing
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
473 // a SIGINT handler internally calls SetConsoleCtrlHandler, which
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
474 // must be called after AllocConsole to be effective.
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
475
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
476 sigset_t signal_mask;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
477
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
478 sigemptyset (&signal_mask);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
479
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
480 sigaddset (&signal_mask, sig);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
481
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
482 pthread_sigmask (how, &signal_mask, 0);
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
483
24118
f87c9f5c0f43 maint: silence several compiler warnings when building for Windows
Mike Miller <mtmiller@octave.org>
parents: 23220
diff changeset
484 #else
f87c9f5c0f43 maint: silence several compiler warnings when building for Windows
Mike Miller <mtmiller@octave.org>
parents: 23220
diff changeset
485
f87c9f5c0f43 maint: silence several compiler warnings when building for Windows
Mike Miller <mtmiller@octave.org>
parents: 23220
diff changeset
486 octave_unused_parameter (how);
f87c9f5c0f43 maint: silence several compiler warnings when building for Windows
Mike Miller <mtmiller@octave.org>
parents: 23220
diff changeset
487 octave_unused_parameter (sig);
f87c9f5c0f43 maint: silence several compiler warnings when building for Windows
Mike Miller <mtmiller@octave.org>
parents: 23220
diff changeset
488
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
489 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
490 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
491
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
492 void
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
493 octave_block_interrupt_signal (void)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
494 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
495 block_or_unblock_signal (SIG_BLOCK, SIGINT);
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
496
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
497 #if defined (SIGBREAK)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
498 block_or_unblock_signal (SIG_BLOCK, SIGBREAK);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
499 #endif
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
500 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
501
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
502 void
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
503 octave_unblock_interrupt_signal (void)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
504 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
505 block_or_unblock_signal (SIG_UNBLOCK, SIGINT);
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
506
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
507 #if defined (SIGBREAK)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
508 block_or_unblock_signal (SIG_UNBLOCK, SIGBREAK);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
509 #endif
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
510 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
511
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
512 static void
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
513 block_or_unblock_signal_by_name (int how, const char *signame)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
514 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
515 int sig;
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
516
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
517 if (octave_get_sig_number (signame, &sig))
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
518 block_or_unblock_signal (how, sig);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
519 }
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
521 void
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
522 octave_block_signal_by_name (const char *signame)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
523 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
524 block_or_unblock_signal_by_name (SIG_BLOCK, signame);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
525 }
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
526
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
527 void
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
528 octave_unblock_signal_by_name (const char *signame)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
529 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
530 block_or_unblock_signal_by_name (SIG_UNBLOCK, signame);
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
531 }
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
532
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
533 /* Allow us to save the signal mask and then restore it to the most
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
534 recently saved value. This is necessary when using the POSIX signal
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
535 handling interface on some systems calling longjmp out of the signal
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
536 handler to get to the top level on an interrupt doesn't restore the
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
537 original signal mask. Alternatively, we could use
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
538 sigsetjmp/siglongjmp, but saving and restoring the signal mask
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
539 ourselves works ok and seems simpler just now. */
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
540
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
541 static sigset_t octave_signal_mask;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
542
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
543 void
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
544 octave_save_signal_mask (void)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
545 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
546 sigprocmask (0, 0, &octave_signal_mask);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
547 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
548
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
549 void
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
550 octave_restore_signal_mask (void)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
551 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
552 sigprocmask (SIG_SETMASK, &octave_signal_mask, 0);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
553 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
554
25284
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
555 void *
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
556 octave_alloc_signal_mask (void)
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
557 {
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
558 return malloc (sizeof (sigset_t));
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
559 }
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
560
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
561 void
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
562 octave_free_signal_mask (void *mask)
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
563 {
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
564 free (mask);
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
565 }
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
566
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
567 void
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
568 octave_get_signal_mask (void *mask)
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
569 {
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
570 sigprocmask (0, 0, mask);
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
571 }
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
572
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
573 void
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
574 octave_set_signal_mask (void *mask)
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
575 {
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
576 sigprocmask (SIG_SETMASK, (sigset_t *) mask, 0);
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
577 }
78fb24bdd8bb unblock async signals before executing subprocess (bug #53635)
John W. Eaton <jwe@octave.org>
parents: 25054
diff changeset
578
21941
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
579 int
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
580 octave_raise_wrapper (int signum)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
581 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
582 return raise (signum);
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
583 }
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
584
24683
328053e1d232 Avoid warnings when compiling for win32 (bug #53049)
Markus Mützel <markus.muetzel@gmx.de>
parents: 24534
diff changeset
585 #if ! defined (__WIN32__)
24520
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
586 static void
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
587 print_sigset (FILE *of, const char *prefix, const sigset_t *sigset)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
588 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
589 int sig;
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
590 int cnt = 0;
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
591
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
592 for (sig = 1; sig < NSIG; sig++)
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
593 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
594 if (sigismember (sigset, sig))
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
595 {
c5c11b07598a refactor signal handling (bug #52757)
John W. Eaton <jwe@octave.org>
parents: 24118
diff changeset
596 cnt++;
25683
bbbf0d961a94 avoid fprintf format warning on some systems
John W. Eaton <jwe@octave.org>
parents: 25284
diff changeset
597 fprintf (of, "%ld: %s%d (%s)\n", (long int) pthread_self (),
bbbf0d961a94 avoid fprintf format warning on some systems
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598 prefix, sig, strsignal (sig));
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599 }
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600 }
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601
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602 if (cnt == 0)
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603 fprintf (of, "%ld: %s<empty signal set>\n", (long int) pthread_self (),
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604 prefix);
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605 }
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606
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607 static int
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608 print_sigmask (FILE *of, const char *msg)
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609 {
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610 sigset_t sigmask;
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611
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612 if (msg)
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613 fprintf (of, "%s", msg);
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614
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615 if (pthread_sigmask (SIG_BLOCK, NULL, &sigmask) == -1)
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616 return -1;
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617
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618 print_sigset (of, "\t\t", &sigmask);
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619
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620 return 0;
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621 }
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622 #endif
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623
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624 void
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625 octave_show_sigmask (const char *msg)
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626 {
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627 #if ! defined (__WIN32__)
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628 if (! msg)
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629 msg = "signal mask\n";
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630
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631 print_sigmask (stderr, msg);
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632 #else
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633 octave_unused_parameter (msg);
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634
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635 fputs ("no signal mask on Windows systems\n", stderr);
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636 #endif
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637 }