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