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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1230
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24 #include <config.h> |
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25 #endif |
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26 |
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2536
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27 #include <cstdlib> |
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28 |
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3503
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29 #include <iostream> |
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1344
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30 #include <new> |
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31 |
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1350
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32 #ifdef HAVE_UNISTD_H |
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2442
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33 #ifdef HAVE_SYS_TYPES_H |
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834
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34 #include <sys/types.h> |
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2442
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35 #endif |
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834
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36 #include <unistd.h> |
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37 #endif |
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1343
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38 |
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3281
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39 #include "cmd-edit.h" |
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4153
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40 #include "quit.h" |
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3281
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41 |
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4185
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42 #include "defun.h" |
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1352
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43 #include "error.h" |
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1373
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44 #include "load-save.h" |
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4294
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45 #include "oct-map.h" |
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2091
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46 #include "pager.h" |
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4185
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47 #include "pt-bp.h" |
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1
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48 #include "sighandlers.h" |
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4787
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49 #include "sysdep.h" |
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1352
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50 #include "syswait.h" |
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2091
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51 #include "toplev.h" |
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1
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52 #include "utils.h" |
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53 |
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54 // Nonzero means we have already printed a message for this series of |
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55 // SIGPIPES. We assume that the writer will eventually give up. |
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56 int pipe_handler_error_count = 0; |
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57 |
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3018
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58 // TRUE means we can be interrupted. |
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59 bool can_interrupt = false; |
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1
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60 |
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4185
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61 // TRUE means we should try to enter the debugger on SIGINT. |
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62 static bool Vdebug_on_interrupt = false; |
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63 |
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4449
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64 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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65 // closing gnome-terminal, for example). Note that this variable has |
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66 // no effect if Vcrash_dumps_octave_core is FALSE. |
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67 static bool Vsighup_dumps_octave_core; |
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68 |
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69 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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70 static bool Vsigterm_dumps_octave_core; |
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71 |
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2469
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72 #if RETSIGTYPE == void |
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73 #define SIGHANDLER_RETURN(status) return |
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74 #else |
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75 #define SIGHANDLER_RETURN(status) return status |
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76 #endif |
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77 |
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2554
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78 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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79 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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80 octave_set_signal_handler (sig, handler) |
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2931
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81 #define REINSTALL_USES_SIG 1 |
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2554
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82 #else |
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83 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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84 do { } while (0) |
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85 #endif |
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86 |
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87 #if defined (__EMX__) |
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2626
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88 #define MAYBE_ACK_SIGNAL(sig) \ |
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89 octave_set_signal_handler (sig, SIG_ACK) |
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90 #define ACK_USES_SIG 1 |
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91 #else |
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2626
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92 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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93 do { } while (0) |
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94 #endif |
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95 |
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96 static void |
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4787
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97 my_friendly_exit (const char *sig_name, int sig_number, |
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98 bool save_vars = true) |
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99 { |
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2536
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100 static bool been_there_done_that = false; |
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101 |
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102 if (been_there_done_that) |
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103 { |
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2554
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104 #if defined (SIGABRT) |
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2536
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105 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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106 #endif |
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107 |
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3644
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108 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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2536
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109 abort (); |
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110 } |
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111 else |
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112 { |
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113 been_there_done_that = true; |
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114 |
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3644
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115 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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2536
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116 |
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4787
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117 if (save_vars) |
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4791
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118 dump_octave_core (); |
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119 |
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3162
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120 if (sig_number < 0) |
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121 exit (1); |
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122 else |
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123 { |
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124 octave_set_signal_handler (sig_number, SIG_DFL); |
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125 |
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4092
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126 #if defined (HAVE_RAISE) |
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127 raise (sig_number); |
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128 #elif defined (HAVE_KILL) |
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3162
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129 kill (getpid (), sig_number); |
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4092
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130 #else |
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131 exit (1); |
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132 #endif |
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3162
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133 } |
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134 |
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2536
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135 } |
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1
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136 } |
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137 |
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1446
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138 sig_handler * |
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139 octave_set_signal_handler (int sig, sig_handler *handler) |
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140 { |
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141 #if defined (HAVE_POSIX_SIGNALS) |
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142 struct sigaction act, oact; |
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143 act.sa_handler = handler; |
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144 act.sa_flags = 0; |
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145 sigemptyset (&act.sa_mask); |
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146 sigemptyset (&oact.sa_mask); |
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147 sigaction (sig, &act, &oact); |
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148 return oact.sa_handler; |
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149 #else |
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150 return signal (sig, handler); |
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151 #endif |
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152 } |
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153 |
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1
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154 static RETSIGTYPE |
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1446
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155 generic_sig_handler (int sig) |
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1
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156 { |
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1446
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157 my_friendly_exit (sys_siglist[sig], sig); |
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1
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158 |
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2469
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159 SIGHANDLER_RETURN (0); |
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1
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160 } |
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161 |
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2091
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162 // Handle SIGCHLD. |
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163 |
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4064
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164 #ifdef SIGCHLD |
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165 static RETSIGTYPE |
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166 sigchld_handler (int /* sig */) |
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167 { |
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2705
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168 volatile octave_interrupt_handler saved_interrupt_handler |
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2554
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169 = octave_ignore_interrupts (); |
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170 |
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2626
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171 // I wonder if this is really right, or if SIGCHLD should just be |
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172 // blocked on OS/2 systems the same as for systems with POSIX signal |
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173 // functions. |
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174 |
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175 #if defined (__EMX__) |
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176 volatile sig_handler *saved_sigchld_handler |
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177 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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178 #endif |
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179 |
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2626
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180 sigset_t set, oset; |
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181 |
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182 BLOCK_CHILD (set, oset); |
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183 |
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2209
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184 int n = octave_child_list::length (); |
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185 |
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3252
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186 for (int i = 0; i < n; i++) |
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187 { |
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3252
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188 octave_child& elt = octave_child_list::elem (i); |
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189 |
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190 pid_t pid = elt.pid; |
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191 |
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3252
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192 if (pid > 0) |
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193 { |
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194 int status; |
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195 |
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3252
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196 if (waitpid (pid, &status, WNOHANG) > 0) |
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197 { |
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3252
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198 elt.pid = -1; |
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199 |
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3252
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200 octave_child::dead_child_handler f = elt.handler; |
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2197
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201 |
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3252
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202 if (f) |
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203 f (pid, status); |
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2197
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204 |
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3252
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205 break; |
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2091
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206 } |
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1230
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207 } |
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208 } |
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209 |
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2600
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210 octave_set_interrupt_handler (saved_interrupt_handler); |
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211 |
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212 UNBLOCK_CHILD (oset); |
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213 |
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214 #ifdef __EMX__ |
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215 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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2475
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216 #endif |
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217 |
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218 MAYBE_ACK_SIGNAL (SIGCHLD); |
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219 |
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220 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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221 |
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222 SIGHANDLER_RETURN (0); |
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223 } |
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4064
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224 #endif /* defined(SIGCHLD) */ |
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225 |
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4064
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226 #ifdef SIGFPE |
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227 #if defined (__alpha__) |
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228 static RETSIGTYPE |
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229 sigfpe_handler (int /* sig */) |
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230 { |
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231 MAYBE_ACK_SIGNAL (SIGFPE); |
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232 |
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233 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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234 |
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3531
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235 std::cerr << "error: floating point exception -- trying to return to prompt\n"; |
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236 |
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4182
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237 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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238 // here? |
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239 |
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4793
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240 if (can_interrupt && octave_interrupt_state >= 0) |
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4787
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241 octave_interrupt_state++; |
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1373
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242 |
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2469
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243 SIGHANDLER_RETURN (0); |
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1373
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244 } |
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4064
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245 #endif /* defined(__alpha__) */ |
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246 #endif /* defined(SIGFPE) */ |
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247 |
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4449
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248 #if defined (SIGHUP) || defined (SIGTERM) |
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249 static RETSIGTYPE |
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250 sig_hup_or_term_handler (int sig) |
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251 { |
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252 MAYBE_ACK_SIGNAL (sig); |
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253 |
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254 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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255 |
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256 switch (sig) |
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257 { |
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258 #if defined (SIGHUP) |
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259 case SIGHUP: |
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260 { |
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261 if (Vsighup_dumps_octave_core) |
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262 dump_octave_core (); |
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4449
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263 } |
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264 break; |
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265 #endif |
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266 |
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267 #if defined (SIGTERM) |
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268 case SIGTERM: |
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269 { |
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270 if (Vsigterm_dumps_octave_core) |
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4791
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271 dump_octave_core (); |
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4449
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272 } |
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273 break; |
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274 #endif |
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275 |
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276 default: |
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277 break; |
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278 } |
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279 |
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280 clean_up_and_exit (0); |
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281 |
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282 SIGHANDLER_RETURN (0); |
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283 } |
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284 #endif |
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285 |
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3343
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286 #if 0 |
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3281
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287 #if defined (SIGWINCH) |
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288 static RETSIGTYPE |
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289 sigwinch_handler (int /* sig */) |
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290 { |
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291 MAYBE_ACK_SIGNAL (SIGWINCH); |
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292 |
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293 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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294 |
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295 command_editor::resize_terminal (); |
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296 |
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297 SIGHANDLER_RETURN (0); |
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298 } |
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299 #endif |
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3343
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300 #endif |
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3281
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301 |
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635
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302 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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303 // |
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304 // This also has to work for SIGBREAK (on systems that have it), so we |
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305 // use the value of sig, instead of just assuming that it is called |
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306 // for SIGINT only. |
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635
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307 |
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1
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308 static RETSIGTYPE |
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2554
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309 sigint_handler (int sig) |
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1
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310 { |
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2626
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311 MAYBE_ACK_SIGNAL (sig); |
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2554
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312 |
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313 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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834
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314 |
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4172
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315 if (! octave_initialized) |
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316 exit (1); |
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317 |
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1
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318 if (can_interrupt) |
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319 { |
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4185
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320 if (Vdebug_on_interrupt) |
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321 { |
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322 if (! octave_debug_on_interrupt_state) |
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323 { |
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324 octave_debug_on_interrupt_state = true; |
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325 |
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326 SIGHANDLER_RETURN (0); |
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327 } |
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328 else |
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329 // Clear the flag and do normal interrupt stuff. |
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330 octave_debug_on_interrupt_state = false; |
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331 } |
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332 |
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4153
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333 if (octave_interrupt_immediately) |
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334 octave_jump_to_enclosing_context (); |
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4429
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335 else |
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4787
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336 { |
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4793
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337 // If we are already cleaning up from a previous interrupt, |
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338 // take note of the fact that another interrupt signal has |
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339 // arrived. |
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340 |
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341 if (octave_interrupt_state < 0) |
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342 octave_interrupt_state = 0; |
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343 |
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4787
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344 octave_interrupt_state++; |
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345 |
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4791
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346 if (interactive && octave_interrupt_state == 2) |
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347 std::cerr << "Press Control-C again to abort." << std::endl; |
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4787
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348 |
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4791
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349 if (octave_interrupt_state >= 3) |
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350 my_friendly_exit (sys_siglist[sig], sig, true); |
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4787
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351 } |
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1
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352 } |
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353 |
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2469
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354 SIGHANDLER_RETURN (0); |
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1
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355 } |
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356 |
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4064
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357 #ifdef SIGPIPE |
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1
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358 static RETSIGTYPE |
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1488
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359 sigpipe_handler (int /* sig */) |
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1
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360 { |
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2626
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361 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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362 |
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363 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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364 |
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1
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365 if (pipe_handler_error_count++ == 0) |
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3531
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366 std::cerr << "warning: broken pipe\n"; |
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1
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367 |
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1358
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368 // Don't loop forever on account of this. |
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369 |
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4182
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370 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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371 // here? |
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372 |
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4793
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373 if (pipe_handler_error_count > 100 && octave_interrupt_state >= 0) |
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4787
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374 octave_interrupt_state++; |
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1
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375 |
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2469
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376 SIGHANDLER_RETURN (0); |
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1
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377 } |
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4064
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378 #endif /* defined(SIGPIPE) */ |
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1
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379 |
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2705
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380 octave_interrupt_handler |
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2554
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381 octave_catch_interrupts (void) |
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382 { |
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2705
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383 octave_interrupt_handler retval; |
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2554
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384 |
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385 #ifdef SIGINT |
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2705
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386 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
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2554
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387 #endif |
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388 |
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389 #ifdef SIGBREAK |
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2705
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390 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
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2554
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391 #endif |
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2705
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392 |
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393 return retval; |
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2554
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394 } |
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395 |
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2705
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396 octave_interrupt_handler |
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397 octave_ignore_interrupts (void) |
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2554
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398 { |
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2705
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399 octave_interrupt_handler retval; |
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400 |
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2554
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401 #ifdef SIGINT |
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2705
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402 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
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2554
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403 #endif |
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404 |
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405 #ifdef SIGBREAK |
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2705
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406 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
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2554
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407 #endif |
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2705
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408 |
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409 return retval; |
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410 } |
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411 |
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412 octave_interrupt_handler |
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413 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h) |
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414 { |
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415 octave_interrupt_handler retval; |
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416 |
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417 #ifdef SIGINT |
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418 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler); |
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419 #endif |
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420 |
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421 #ifdef SIGBREAK |
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422 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler); |
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423 #endif |
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424 |
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425 return retval; |
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1651
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426 } |
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427 |
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635
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428 // Install all the handlers for the signals we might care about. |
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429 |
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1
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430 void |
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431 install_signal_handlers (void) |
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432 { |
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2554
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433 octave_catch_interrupts (); |
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434 |
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1
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435 #ifdef SIGABRT |
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1446
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436 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
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1
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437 #endif |
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438 |
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439 #ifdef SIGALRM |
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1446
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440 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
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1
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441 #endif |
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442 |
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443 #ifdef SIGBUS |
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1446
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444 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
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1
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445 #endif |
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446 |
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1230
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447 #ifdef SIGCHLD |
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1446
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448 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
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1230
|
449 #endif |
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450 |
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3174
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451 // SIGCLD |
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452 // SIGCONT |
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|
453 |
|
1
|
454 #ifdef SIGEMT |
|
1446
|
455 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
|
1
|
456 #endif |
|
|
457 |
|
|
458 #ifdef SIGFPE |
|
1373
|
459 #if defined (__alpha__) |
|
1446
|
460 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
|
1373
|
461 #else |
|
1446
|
462 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
|
1
|
463 #endif |
|
1373
|
464 #endif |
|
1
|
465 |
|
|
466 #ifdef SIGHUP |
|
4449
|
467 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
|
1
|
468 #endif |
|
|
469 |
|
|
470 #ifdef SIGILL |
|
1446
|
471 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
472 #endif |
|
|
473 |
|
3174
|
474 // SIGINFO |
|
|
475 // SIGINT |
|
|
476 |
|
1
|
477 #ifdef SIGIOT |
|
1446
|
478 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
479 #endif |
|
|
480 |
|
|
481 #ifdef SIGLOST |
|
1446
|
482 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
483 #endif |
|
|
484 |
|
|
485 #ifdef SIGPIPE |
|
1446
|
486 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
487 #endif |
|
|
488 |
|
|
489 #ifdef SIGPOLL |
|
1446
|
490 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
491 #endif |
|
|
492 |
|
|
493 #ifdef SIGPROF |
|
1446
|
494 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
495 #endif |
|
|
496 |
|
3174
|
497 // SIGPWR |
|
|
498 |
|
1
|
499 #ifdef SIGQUIT |
|
1446
|
500 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
501 #endif |
|
|
502 |
|
|
503 #ifdef SIGSEGV |
|
1446
|
504 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
505 #endif |
|
|
506 |
|
3174
|
507 // SIGSTOP |
|
|
508 |
|
1
|
509 #ifdef SIGSYS |
|
1446
|
510 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
511 #endif |
|
|
512 |
|
|
513 #ifdef SIGTERM |
|
4449
|
514 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
515 #endif |
|
|
516 |
|
|
517 #ifdef SIGTRAP |
|
1446
|
518 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
519 #endif |
|
|
520 |
|
3174
|
521 // SIGTSTP |
|
|
522 // SIGTTIN |
|
|
523 // SIGTTOU |
|
|
524 // SIGURG |
|
|
525 |
|
1
|
526 #ifdef SIGUSR1 |
|
1446
|
527 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
528 #endif |
|
|
529 |
|
|
530 #ifdef SIGUSR2 |
|
1446
|
531 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
532 #endif |
|
|
533 |
|
|
534 #ifdef SIGVTALRM |
|
1446
|
535 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
536 #endif |
|
|
537 |
|
895
|
538 #ifdef SIGIO |
|
1446
|
539 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
540 #endif |
|
|
541 |
|
3343
|
542 #if 0 |
|
3281
|
543 #ifdef SIGWINCH |
|
|
544 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
545 #endif |
|
3343
|
546 #endif |
|
3174
|
547 |
|
1
|
548 #ifdef SIGXCPU |
|
1446
|
549 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
550 #endif |
|
|
551 |
|
|
552 #ifdef SIGXFSZ |
|
1446
|
553 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
554 #endif |
|
|
555 } |
|
|
556 |
|
4294
|
557 static Octave_map |
|
|
558 make_sig_struct (void) |
|
|
559 { |
|
|
560 Octave_map m; |
|
|
561 |
|
|
562 #ifdef SIGABRT |
|
4675
|
563 m.assign ("ABRT", SIGABRT); |
|
4294
|
564 #endif |
|
|
565 |
|
|
566 #ifdef SIGALRM |
|
4675
|
567 m.assign ("ALRM", SIGALRM); |
|
4294
|
568 #endif |
|
|
569 |
|
|
570 #ifdef SIGBUS |
|
4675
|
571 m.assign ("BUS", SIGBUS); |
|
4294
|
572 #endif |
|
|
573 |
|
|
574 #ifdef SIGCHLD |
|
4675
|
575 m.assign ("CHLD", SIGCHLD); |
|
4294
|
576 #endif |
|
|
577 |
|
|
578 #ifdef SIGCLD |
|
4675
|
579 m.assign ("CLD", SIGCLD); |
|
4294
|
580 #endif |
|
|
581 |
|
|
582 #ifdef SIGCONT |
|
4675
|
583 m.assign ("CONT", SIGCONT); |
|
4294
|
584 #endif |
|
|
585 |
|
|
586 #ifdef SIGEMT |
|
4675
|
587 m.assign ("EMT", SIGEMT); |
|
4294
|
588 #endif |
|
|
589 |
|
|
590 #ifdef SIGFPE |
|
4675
|
591 m.assign ("FPE", SIGFPE); |
|
4294
|
592 #endif |
|
|
593 |
|
|
594 #ifdef SIGHUP |
|
4675
|
595 m.assign ("HUP", SIGHUP); |
|
4294
|
596 #endif |
|
|
597 |
|
|
598 #ifdef SIGILL |
|
4675
|
599 m.assign ("ILL", SIGILL); |
|
4294
|
600 #endif |
|
|
601 |
|
|
602 #ifdef SIGINFO |
|
4675
|
603 m.assign ("INFO", SIGINFO); |
|
4294
|
604 #endif |
|
|
605 |
|
|
606 #ifdef SIGINT |
|
4675
|
607 m.assign ("INT", SIGINT); |
|
4294
|
608 #endif |
|
|
609 |
|
|
610 #ifdef SIGIOT |
|
4675
|
611 m.assign ("IOT", SIGIOT); |
|
4294
|
612 #endif |
|
|
613 |
|
|
614 #ifdef SIGLOST |
|
4675
|
615 m.assign ("LOST", SIGLOST); |
|
4294
|
616 #endif |
|
|
617 |
|
|
618 #ifdef SIGPIPE |
|
4675
|
619 m.assign ("PIPE", SIGPIPE); |
|
4294
|
620 #endif |
|
|
621 |
|
|
622 #ifdef SIGPOLL |
|
4675
|
623 m.assign ("POLL", SIGPOLL); |
|
4294
|
624 #endif |
|
|
625 |
|
|
626 #ifdef SIGPROF |
|
4675
|
627 m.assign ("PROF", SIGPROF); |
|
4294
|
628 #endif |
|
|
629 |
|
|
630 #ifdef SIGPWR |
|
4675
|
631 m.assign ("PWR", SIGPWR); |
|
4294
|
632 #endif |
|
|
633 |
|
|
634 #ifdef SIGQUIT |
|
4675
|
635 m.assign ("QUIT", SIGQUIT); |
|
4294
|
636 #endif |
|
|
637 |
|
|
638 #ifdef SIGSEGV |
|
4675
|
639 m.assign ("SEGV", SIGSEGV); |
|
4294
|
640 #endif |
|
|
641 |
|
|
642 #ifdef SIGSTOP |
|
4675
|
643 m.assign ("STOP", SIGSTOP); |
|
4294
|
644 #endif |
|
|
645 |
|
|
646 #ifdef SIGSYS |
|
4675
|
647 m.assign ("SYS", SIGSYS); |
|
4294
|
648 #endif |
|
|
649 |
|
|
650 #ifdef SIGTERM |
|
4675
|
651 m.assign ("TERM", SIGTERM); |
|
4294
|
652 #endif |
|
|
653 |
|
|
654 #ifdef SIGTRAP |
|
4675
|
655 m.assign ("TRAP", SIGTRAP); |
|
4294
|
656 #endif |
|
|
657 |
|
|
658 #ifdef SIGTSTP |
|
4675
|
659 m.assign ("TSTP", SIGTSTP); |
|
4294
|
660 #endif |
|
|
661 |
|
|
662 #ifdef SIGTTIN |
|
4675
|
663 m.assign ("TTIN", SIGTTIN); |
|
4294
|
664 #endif |
|
|
665 |
|
|
666 #ifdef SIGTTOU |
|
4675
|
667 m.assign ("TTOU", SIGTTOU); |
|
4294
|
668 #endif |
|
|
669 |
|
|
670 #ifdef SIGURG |
|
4675
|
671 m.assign ("URG", SIGURG); |
|
4294
|
672 #endif |
|
|
673 |
|
|
674 #ifdef SIGUSR1 |
|
4675
|
675 m.assign ("USR1", SIGUSR1); |
|
4294
|
676 #endif |
|
|
677 |
|
|
678 #ifdef SIGUSR2 |
|
4675
|
679 m.assign ("USR2", SIGUSR2); |
|
4294
|
680 #endif |
|
|
681 |
|
|
682 #ifdef SIGVTALRM |
|
4675
|
683 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
684 #endif |
|
|
685 |
|
|
686 #ifdef SIGIO |
|
4675
|
687 m.assign ("IO", SIGIO); |
|
4294
|
688 #endif |
|
|
689 |
|
|
690 #ifdef SIGWINCH |
|
4675
|
691 m.assign ("WINCH", SIGWINCH); |
|
4294
|
692 #endif |
|
|
693 |
|
|
694 #ifdef SIGXCPU |
|
4675
|
695 m.assign ("XCPU", SIGXCPU); |
|
4294
|
696 #endif |
|
|
697 |
|
|
698 #ifdef SIGXFSZ |
|
4675
|
699 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
700 #endif |
|
|
701 |
|
|
702 return m; |
|
|
703 } |
|
|
704 |
|
2209
|
705 octave_child_list *octave_child_list::instance = 0; |
|
|
706 |
|
2926
|
707 bool |
|
|
708 octave_child_list::instance_ok (void) |
|
|
709 { |
|
|
710 bool retval = true; |
|
|
711 |
|
|
712 if (! instance) |
|
|
713 instance = new octave_child_list (); |
|
|
714 |
|
|
715 if (! instance) |
|
|
716 { |
|
|
717 ::error ("unable to create child list object!"); |
|
|
718 |
|
|
719 retval = false; |
|
|
720 } |
|
|
721 |
|
|
722 return retval; |
|
|
723 } |
|
|
724 |
|
|
725 void |
|
|
726 octave_child_list::insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
727 { |
|
|
728 if (instance_ok ()) |
|
|
729 instance->do_insert (pid, f); |
|
|
730 } |
|
|
731 |
|
|
732 void |
|
|
733 octave_child_list::remove (pid_t pid) |
|
|
734 { |
|
|
735 if (instance_ok ()) |
|
|
736 instance->do_remove (pid); |
|
|
737 } |
|
|
738 |
|
|
739 int |
|
|
740 octave_child_list::length (void) |
|
|
741 { |
|
|
742 return (instance_ok ()) ? instance->do_length () : 0; |
|
|
743 } |
|
|
744 |
|
|
745 octave_child& |
|
|
746 octave_child_list::elem (int i) |
|
|
747 { |
|
|
748 static octave_child foo; |
|
|
749 |
|
|
750 return (instance_ok ()) ? instance->do_elem (i) : foo; |
|
|
751 } |
|
|
752 |
|
2209
|
753 void |
|
|
754 octave_child_list::do_insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
755 { |
|
|
756 // Insert item in first open slot, increasing size of list if |
|
|
757 // necessary. |
|
|
758 |
|
|
759 bool enlarge = true; |
|
|
760 |
|
|
761 for (int i = 0; i < curr_len; i++) |
|
|
762 { |
|
2305
|
763 octave_child& tmp = list (i); |
|
2209
|
764 |
|
|
765 if (tmp.pid < 0) |
|
|
766 { |
|
2305
|
767 list (i) = octave_child (pid, f); |
|
2209
|
768 enlarge = false; |
|
|
769 break; |
|
|
770 } |
|
|
771 } |
|
|
772 |
|
|
773 if (enlarge) |
|
|
774 { |
|
|
775 int total_len = list.length (); |
|
|
776 |
|
|
777 if (curr_len == total_len) |
|
|
778 { |
|
|
779 if (total_len == 0) |
|
|
780 list.resize (16); |
|
|
781 else |
|
|
782 list.resize (total_len * 2); |
|
|
783 } |
|
|
784 |
|
2305
|
785 list (curr_len) = octave_child (pid, f); |
|
2209
|
786 curr_len++; |
|
|
787 } |
|
|
788 } |
|
|
789 |
|
|
790 void |
|
2210
|
791 octave_child_list::do_remove (pid_t pid) |
|
|
792 { |
|
|
793 // Mark the record for PID invalid. |
|
|
794 |
|
|
795 for (int i = 0; i < curr_len; i++) |
|
|
796 { |
|
2305
|
797 octave_child& tmp = list (i); |
|
2210
|
798 |
|
|
799 if (tmp.pid == pid) |
|
|
800 { |
|
|
801 tmp.pid = -1; |
|
|
802 break; |
|
|
803 } |
|
|
804 } |
|
|
805 } |
|
|
806 |
|
2926
|
807 int |
|
|
808 octave_child_list::do_length (void) const |
|
|
809 { |
|
|
810 return curr_len; |
|
|
811 } |
|
|
812 |
|
|
813 octave_child& |
|
|
814 octave_child_list::do_elem (int i) |
|
2210
|
815 { |
|
2926
|
816 static octave_child foo; |
|
|
817 |
|
|
818 int n = do_length (); |
|
2210
|
819 |
|
2926
|
820 if (i >= 0 && i < n) |
|
|
821 return list (i); |
|
2210
|
822 else |
|
2926
|
823 return foo; |
|
2210
|
824 } |
|
|
825 |
|
4185
|
826 static int |
|
|
827 debug_on_interrupt (void) |
|
|
828 { |
|
|
829 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
830 |
|
|
831 return 0; |
|
|
832 } |
|
|
833 |
|
4449
|
834 static int |
|
|
835 sighup_dumps_octave_core (void) |
|
|
836 { |
|
|
837 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
838 |
|
|
839 return 0; |
|
|
840 } |
|
|
841 |
|
|
842 static int |
|
|
843 sigterm_dumps_octave_core (void) |
|
|
844 { |
|
|
845 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
846 |
|
|
847 return 0; |
|
|
848 } |
|
|
849 |
|
4185
|
850 void |
|
|
851 symbols_of_sighandlers (void) |
|
|
852 { |
|
4233
|
853 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
854 "-*- texinfo -*-\n\ |
|
|
855 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
856 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
857 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
858 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
859 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
860 The default value is 0.\n\ |
|
|
861 @end defvr"); |
|
4294
|
862 |
|
4449
|
863 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
864 "-*- texinfo -*-\n\ |
|
|
865 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
866 If this variable is set to a nonzero value and\n\ |
|
|
867 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
868 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
869 hangup signal. The default value is 1.\n\ |
|
|
870 @end defvr"); |
|
|
871 |
|
|
872 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
873 "-*- texinfo -*-\n\ |
|
|
874 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
875 If this variable is set to a nonzero value and\n\ |
|
|
876 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
877 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
878 terminate signal. The default value is 1.\n\ |
|
|
879 @end defvr"); |
|
|
880 |
|
4294
|
881 DEFCONST (SIG, make_sig_struct (), |
|
|
882 "-*- texinfo -*-\n\ |
|
|
883 @defvr {Built-in Variable} SIG\n\ |
|
|
884 Structure of Unix signal names and their defined values.\n\ |
|
|
885 @end defvr"); |
|
4185
|
886 } |
|
|
887 |
|
1
|
888 /* |
|
|
889 ;;; Local Variables: *** |
|
|
890 ;;; mode: C++ *** |
|
|
891 ;;; End: *** |
|
|
892 */ |
