Mercurial > hg > octave-nkf
annotate src/oct-procbuf.cc @ 10884:cc2bc3f46cd4
fix assignment bug with lazy indices
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Wed, 11 Aug 2010 10:55:31 +0200 |
| parents | 479cc8a0a846 |
| children | fd0a3ac60b0e |
| rev | line source |
|---|---|
| 2094 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2005, 2006 |
| 4 2007 John W. Eaton | |
| 2094 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2094 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2094 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 28 #include <cerrno> | |
| 29 | |
| 3503 | 30 #include <iostream> |
| 2094 | 31 |
| 32 #include <sys/types.h> | |
| 33 #include <unistd.h> | |
| 34 | |
| 3174 | 35 #include "lo-mappers.h" |
| 36 #include "lo-utils.h" | |
| 2094 | 37 #include "oct-procbuf.h" |
| 5453 | 38 #include "oct-syscalls.h" |
| 6726 | 39 #include "sysdep.h" |
| 3176 | 40 #include "variables.h" |
| 2094 | 41 |
| 3174 | 42 #include "defun.h" |
| 43 #include "gripes.h" | |
| 3308 | 44 #include "utils.h" |
| 3174 | 45 |
| 2094 | 46 // This class is based on the procbuf class from libg++, written by |
| 47 // Per Bothner, Copyright (C) 1993 Free Software Foundation. | |
| 48 | |
| 49 static octave_procbuf *octave_procbuf_list = 0; | |
| 50 | |
| 6094 | 51 #ifndef BUFSIZ |
| 52 #define BUFSIZ 1024 | |
| 53 #endif | |
| 54 | |
| 2094 | 55 octave_procbuf * |
| 56 octave_procbuf::open (const char *command, int mode) | |
| 57 { | |
| 6096 | 58 #if defined (__CYGWIN__) || defined (__MINGW32__) || defined (_MSC_VER) |
| 4472 | 59 |
| 60 if (is_open ()) | |
| 61 return 0; | |
| 62 | |
| 6726 | 63 f = octave_popen (command, (mode & std::ios::in) ? "r" : "w"); |
| 4472 | 64 |
| 65 if (! f) | |
| 66 return 0; | |
| 67 | |
| 68 // Oops... popen doesn't return the associated pid, so fake it for now | |
| 69 | |
| 70 proc_pid = 1; | |
| 71 | |
| 72 open_p = true; | |
| 73 | |
| 74 if (mode & std::ios::out) | |
| 6094 | 75 ::setvbuf (f, 0, _IOLBF, BUFSIZ); |
| 4472 | 76 |
| 77 return this; | |
| 78 | |
| 79 #elif defined (HAVE_SYS_WAIT_H) | |
| 2094 | 80 |
| 81 int pipe_fds[2]; | |
| 82 | |
| 3544 | 83 volatile int child_std_end = (mode & std::ios::in) ? 1 : 0; |
| 3156 | 84 |
| 3147 | 85 volatile int parent_end, child_end; |
| 2094 | 86 |
| 87 if (is_open ()) | |
| 88 return 0; | |
| 89 | |
| 90 if (pipe (pipe_fds) < 0) | |
| 91 return 0; | |
| 92 | |
| 3544 | 93 if (mode & std::ios::in) |
| 2094 | 94 { |
| 95 parent_end = pipe_fds[0]; | |
| 96 child_end = pipe_fds[1]; | |
| 97 } | |
| 98 else | |
| 99 { | |
| 100 parent_end = pipe_fds[1]; | |
| 101 child_end = pipe_fds[0]; | |
| 102 } | |
| 103 | |
| 3156 | 104 proc_pid = ::fork (); |
| 2094 | 105 |
| 106 if (proc_pid == 0) | |
| 107 { | |
| 10411 | 108 gnulib::close (parent_end); |
| 2094 | 109 |
| 110 if (child_end != child_std_end) | |
|
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111 { |
| 10411 | 112 gnulib::dup2 (child_end, child_std_end); |
| 113 gnulib::close (child_end); | |
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114 } |
| 2094 | 115 |
| 116 while (octave_procbuf_list) | |
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117 { |
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118 FILE *fp = octave_procbuf_list->f; |
| 3644 | 119 |
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120 if (fp) |
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121 { |
| 10411 | 122 gnulib::fclose (fp); |
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123 fp = 0; |
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124 } |
| 3644 | 125 |
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126 octave_procbuf_list = octave_procbuf_list->next; |
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127 } |
| 2094 | 128 |
| 5510 | 129 execl ("/bin/sh", "sh", "-c", command, static_cast<void *> (0)); |
| 2094 | 130 |
| 131 exit (127); | |
| 132 } | |
| 133 | |
| 10411 | 134 gnulib::close (child_end); |
| 2094 | 135 |
| 136 if (proc_pid < 0) | |
| 137 { | |
| 10411 | 138 gnulib::close (parent_end); |
| 2094 | 139 return 0; |
| 140 } | |
| 141 | |
| 3632 | 142 f = ::fdopen (parent_end, (mode & std::ios::in) ? "r" : "w"); |
| 3631 | 143 |
| 3649 | 144 if (mode & std::ios::out) |
| 6094 | 145 ::setvbuf (f, 0, _IOLBF, BUFSIZ); |
| 3649 | 146 |
| 3631 | 147 open_p = true; |
| 2094 | 148 |
| 149 next = octave_procbuf_list; | |
| 150 octave_procbuf_list = this; | |
| 151 | |
| 152 return this; | |
| 153 | |
| 154 #else | |
| 155 | |
| 156 return 0; | |
| 157 | |
| 158 #endif | |
| 159 } | |
| 160 | |
| 3631 | 161 octave_procbuf * |
| 162 octave_procbuf::close (void) | |
| 2094 | 163 { |
| 6096 | 164 #if defined (__CYGWIN__) || defined (__MINGW32__) || defined (_MSC_VER) |
| 4472 | 165 |
| 166 if (f) | |
| 167 { | |
| 6726 | 168 wstatus = octave_pclose (f); |
| 4472 | 169 f = 0; |
| 170 } | |
| 171 | |
| 172 open_p = false; | |
| 173 | |
| 174 return this; | |
| 175 | |
| 176 #elif defined (HAVE_SYS_WAIT_H) | |
| 2094 | 177 |
| 3644 | 178 if (f) |
| 179 { | |
| 180 pid_t wait_pid; | |
| 2094 | 181 |
| 3644 | 182 int status = -1; |
| 183 | |
| 184 for (octave_procbuf **ptr = &octave_procbuf_list; | |
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185 *ptr != 0; |
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186 ptr = &(*ptr)->next) |
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187 { |
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188 if (*ptr == this) |
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189 { |
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190 *ptr = (*ptr)->next; |
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191 status = 0; |
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192 break; |
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193 } |
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194 } |
| 2094 | 195 |
| 10411 | 196 if (status == 0 && gnulib::fclose (f) == 0) |
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197 { |
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198 using namespace std; |
| 3531 | 199 |
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200 do |
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201 { |
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202 wait_pid = octave_syscalls::waitpid (proc_pid, &wstatus, 0); |
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203 } |
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204 while (wait_pid == -1 && errno == EINTR); |
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205 } |
| 3644 | 206 |
| 207 f = 0; | |
| 3631 | 208 } |
| 2094 | 209 |
| 3631 | 210 open_p = false; |
| 2094 | 211 |
| 3631 | 212 return this; |
| 2094 | 213 |
| 214 #else | |
| 215 | |
| 3631 | 216 return 0; |
| 2094 | 217 |
| 218 #endif | |
| 219 } |