Mercurial > octave
annotate liboctave/system/oct-syscalls.cc @ 21213:f7d1050b9b53
maint: Clean up various usages of #ifdef.
* randmtzig.c: Use #ifdef rather than just #if.
* EditControl.h : Use '#if ! defined' rather than '#ifndef' in
guard block to match Octave style.
* dialog.cc, settings-dialog.cc: Add FIXME notes about questionable use of #if
mechanism.
* file-editor-tab.cc, Array-b.cc, Array-ch.cc, Array-d.cc, Array-f.cc,
Array-i.cc, Array-s.cc, MatrixType.h, quit.h, lo-sysdep.cc, lo-cutils.c,
oct-alloc.h, oct-shlib.cc, sparse-sort.h: #define HAVE_XXX macros to 1, not
just empty but defined.
* octave-txt-lexer.h, octave-cmd.h, octave-preserve-stream-state.h, txt-eng.h,
zfstream.h, oct-conf-features.h, oct-conf.h: Use octave_ namespace prefix on
name of #define used to prevent multiple inclusion of headers.
* parser.h, webinfo.h, ov-oncleanup.h, op-int.h, display-available.h,
shared-fcns.h: Add #define guard to prevent multiple inclusion.
* quadcc.cc: use all capitals for #define MIN_CQUAD_HEAPSIZE.
* ov-intx.h: Add note that this file must not use guard #define.
* eigs-base.h, randmtzig.h: Write '! defined' rather than '!defined'.
* file-ops.cc, oct-sparse.h: Use parentheses around complex #if tests.
* oct-syscalls.cc, oct-base64.cc, statdefs.h: Indent #ifdef blocks correctly.
* oct-conf-post.in.h: Use "! defined". Define macros to 1, not just empty but
defined.
| author | Rik <rik@octave.org> |
|---|---|
| date | Sat, 06 Feb 2016 18:22:32 -0800 |
| parents | f7121e111991 |
| children | 40de9f8f23a6 |
| rev | line source |
|---|---|
| 2941 | 1 /* |
| 2 | |
|
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3 Copyright (C) 1996-2015 John W. Eaton |
| 2941 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 2941 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 2941 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
|
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24 # include <config.h> |
| 2941 | 25 #endif |
| 26 | |
| 27 #include <cerrno> | |
| 6482 | 28 #include <cstdlib> |
| 2941 | 29 |
| 30 #include <string.h> | |
| 31 | |
| 32 #include <sys/types.h> | |
| 33 #include <unistd.h> | |
| 34 | |
| 35 #include <fcntl.h> | |
| 36 | |
| 4299 | 37 // We can't use csignal as kill is not in the std namespace, and picky |
| 38 // compiler runtimes will also exclude it from global scope as well. | |
| 39 | |
| 40 #include <signal.h> | |
| 41 | |
| 5453 | 42 #include "lo-utils.h" |
| 6321 | 43 #include "lo-sysdep.h" |
| 2941 | 44 #include "oct-syscalls.h" |
| 45 #include "str-vec.h" | |
| 46 | |
| 47 #define NOT_SUPPORTED(nm) \ | |
| 4062 | 48 nm ": not supported on this system" |
| 2941 | 49 |
| 50 int | |
| 51 octave_syscalls::dup2 (int old_fd, int new_fd) | |
| 52 { | |
| 3504 | 53 std::string msg; |
| 2941 | 54 return dup2 (old_fd, new_fd, msg); |
| 55 } | |
| 56 | |
| 57 int | |
| 3504 | 58 octave_syscalls::dup2 (int old_fd, int new_fd, std::string& msg) |
| 2941 | 59 { |
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60 msg = ""; |
| 2941 | 61 |
| 62 int status = -1; | |
| 63 | |
| 64 #if defined (HAVE_DUP2) | |
| 10411 | 65 status = gnulib::dup2 (old_fd, new_fd); |
| 2941 | 66 |
| 67 if (status < 0) | |
| 10411 | 68 msg = gnulib::strerror (errno); |
| 2941 | 69 #else |
| 70 msg = NOT_SUPPORTED ("dup2"); | |
| 71 #endif | |
| 72 | |
| 73 return status; | |
| 74 } | |
| 75 | |
| 76 int | |
| 3504 | 77 octave_syscalls::execvp (const std::string& file, const string_vector& argv) |
| 2941 | 78 { |
| 3504 | 79 std::string msg; |
| 2941 | 80 return execvp (file, argv, msg); |
| 81 } | |
| 82 | |
| 83 int | |
| 3504 | 84 octave_syscalls::execvp (const std::string& file, const string_vector& args, |
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85 std::string& msg) |
| 2941 | 86 { |
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87 msg = ""; |
| 2941 | 88 |
| 89 int status = -1; | |
| 90 | |
| 91 #if defined (HAVE_EXECVP) | |
| 92 char **argv = args.c_str_vec (); | |
| 93 | |
| 94 status = ::execvp (file.c_str (), argv); | |
| 95 | |
| 96 string_vector::delete_c_str_vec (argv); | |
| 97 | |
| 98 if (status < 0) | |
| 10411 | 99 msg = gnulib::strerror (errno); |
| 2941 | 100 #else |
| 101 msg = NOT_SUPPORTED ("execvp"); | |
| 102 #endif | |
| 103 | |
| 104 return status; | |
| 105 } | |
| 106 | |
| 107 pid_t | |
| 3504 | 108 octave_syscalls::fork (std::string& msg) |
| 2941 | 109 { |
| 110 pid_t status = -1; | |
| 111 | |
| 112 #if defined (HAVE_FORK) | |
| 113 status = ::fork (); | |
| 114 | |
| 115 if (status < 0) | |
| 10411 | 116 msg = gnulib::strerror (errno); |
| 2941 | 117 #else |
| 118 msg = NOT_SUPPORTED ("fork"); | |
| 119 #endif | |
| 120 | |
| 121 return status; | |
| 122 } | |
| 123 | |
| 124 pid_t | |
| 3504 | 125 octave_syscalls::vfork (std::string& msg) |
| 3147 | 126 { |
| 127 pid_t status = -1; | |
| 128 | |
| 129 #if defined (HAVE_VFORK) || defined (HAVE_FORK) | |
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130 # if defined (HAVE_VFORK) |
| 3147 | 131 status = ::vfork (); |
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132 # else |
| 3148 | 133 status = ::fork (); |
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134 # endif |
| 3147 | 135 |
| 136 if (status < 0) | |
| 10411 | 137 msg = gnulib::strerror (errno); |
| 3147 | 138 #else |
| 139 msg = NOT_SUPPORTED ("vfork"); | |
| 140 #endif | |
| 141 | |
| 142 return status; | |
| 143 } | |
| 144 | |
| 145 pid_t | |
| 3504 | 146 octave_syscalls::getpgrp (std::string& msg) |
| 2941 | 147 { |
| 148 pid_t status = -1; | |
| 149 | |
| 150 #if defined (HAVE_GETPGRP) | |
| 151 status = ::getpgrp (); | |
| 152 | |
| 153 if (status < 0) | |
| 10411 | 154 msg = gnulib::strerror (errno); |
| 2941 | 155 #else |
| 156 msg = NOT_SUPPORTED ("getpgrp"); | |
| 157 #endif | |
| 158 | |
| 159 return status; | |
| 160 } | |
| 161 | |
| 162 pid_t | |
| 163 octave_syscalls::getpid (void) | |
| 164 { | |
| 165 #if defined (HAVE_GETPID) | |
| 166 return ::getpid (); | |
| 167 #else | |
| 168 return 0; | |
| 169 #endif | |
| 170 } | |
| 171 | |
| 172 pid_t | |
| 173 octave_syscalls::getppid (void) | |
| 174 { | |
| 175 #if defined (HAVE_GETPPID) | |
| 176 return ::getppid (); | |
| 177 #else | |
| 178 return 0; | |
| 179 #endif | |
| 180 } | |
| 181 | |
| 182 gid_t | |
| 183 octave_syscalls::getgid (void) | |
| 184 { | |
| 185 #if defined (HAVE_GETGID) | |
| 186 return ::getgid (); | |
| 187 #else | |
| 188 return 0; | |
| 189 #endif | |
| 190 } | |
| 191 | |
| 192 gid_t | |
| 193 octave_syscalls::getegid (void) | |
| 194 { | |
| 195 #if defined (HAVE_GETEGID) | |
| 196 return ::getegid (); | |
| 197 #else | |
| 198 return 0; | |
| 199 #endif | |
| 200 } | |
| 201 | |
| 202 uid_t | |
| 203 octave_syscalls::getuid (void) | |
| 204 { | |
| 205 #if defined (HAVE_GETUID) | |
| 206 return ::getuid (); | |
| 207 #else | |
| 208 return 0; | |
| 209 #endif | |
| 210 } | |
| 211 | |
| 212 uid_t | |
| 213 octave_syscalls::geteuid (void) | |
| 214 { | |
| 215 #if defined (HAVE_GETEUID) | |
| 216 return ::geteuid (); | |
| 217 #else | |
| 218 return 0; | |
| 219 #endif | |
| 220 } | |
| 221 | |
| 222 int | |
| 223 octave_syscalls::pipe (int *fildes) | |
| 224 { | |
| 3504 | 225 std::string msg; |
| 6123 | 226 return pipe (fildes, msg); |
| 2941 | 227 } |
| 228 | |
| 229 int | |
| 3504 | 230 octave_syscalls::pipe (int *fildes, std::string& msg) |
| 2941 | 231 { |
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232 msg = ""; |
| 2941 | 233 |
| 234 int status = -1; | |
| 235 | |
| 236 #if defined (HAVE_PIPE) | |
| 237 status = ::pipe (fildes); | |
| 238 | |
| 239 if (status < 0) | |
| 10411 | 240 msg = gnulib::strerror (errno); |
| 2941 | 241 #else |
| 242 msg = NOT_SUPPORTED ("pipe"); | |
| 243 #endif | |
| 244 | |
| 245 return status; | |
| 246 } | |
| 247 | |
| 248 pid_t | |
| 5453 | 249 octave_syscalls::waitpid (pid_t pid, int *status, int options) |
| 2941 | 250 { |
| 3504 | 251 std::string msg; |
| 5453 | 252 return waitpid (pid, status, options, msg); |
| 2941 | 253 } |
| 254 | |
| 255 pid_t | |
| 5453 | 256 octave_syscalls::waitpid (pid_t pid, int *status, int options, |
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257 std::string& msg) |
| 2941 | 258 { |
| 6060 | 259 pid_t retval = -1; |
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260 msg = ""; |
| 2941 | 261 |
| 5453 | 262 #if defined (HAVE_WAITPID) |
| 6060 | 263 retval = ::octave_waitpid (pid, status, options); |
| 2941 | 264 |
| 5453 | 265 if (retval < 0) |
| 10411 | 266 msg = gnulib::strerror (errno); |
| 2941 | 267 #else |
| 268 msg = NOT_SUPPORTED ("waitpid"); | |
| 269 #endif | |
| 270 | |
| 5453 | 271 return retval; |
| 2941 | 272 } |
| 273 | |
| 4294 | 274 int |
| 275 octave_syscalls::kill (pid_t pid, int sig) | |
| 276 { | |
| 277 std::string msg; | |
| 278 return kill (pid, sig, msg); | |
| 279 } | |
| 280 | |
| 281 int | |
| 282 octave_syscalls::kill (pid_t pid, int sig, std::string& msg) | |
| 283 { | |
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284 msg = ""; |
| 4294 | 285 |
| 286 int status = -1; | |
| 287 | |
| 288 #if defined (HAVE_KILL) | |
| 289 status = ::kill (pid, sig); | |
| 290 | |
| 291 if (status < 0) | |
| 10411 | 292 msg = gnulib::strerror (errno); |
| 4294 | 293 #else |
| 294 msg = NOT_SUPPORTED ("kill"); | |
| 295 #endif | |
| 296 | |
| 297 return status; | |
| 298 } | |
| 299 | |
| 6321 | 300 pid_t |
| 301 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, | |
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302 bool sync_mode, int *fildes) |
| 6321 | 303 { |
| 304 std::string msg; | |
| 305 bool interactive = false; | |
| 306 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); | |
| 307 } | |
| 308 | |
| 309 pid_t | |
| 310 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, | |
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311 bool sync_mode, int *fildes, std::string& msg) |
| 6321 | 312 { |
| 313 bool interactive = false; | |
| 314 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); | |
| 315 } | |
| 316 | |
| 317 pid_t | |
| 318 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, | |
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319 bool sync_mode, int *fildes, std::string& msg, |
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320 bool &interactive) |
| 6321 | 321 { |
| 322 #if defined (__WIN32__) && ! defined (__CYGWIN__) | |
| 323 return ::octave_popen2 (cmd, args, sync_mode, fildes, msg); | |
| 324 #else | |
| 325 pid_t pid; | |
| 326 int child_stdin[2], child_stdout[2]; | |
| 327 | |
| 328 if (pipe (child_stdin, msg) == 0) | |
| 329 { | |
| 330 if (pipe (child_stdout, msg) == 0) | |
| 331 { | |
| 332 pid = fork (msg); | |
| 333 if (pid < 0) | |
| 334 msg = "popen2: process creation failed -- " + msg; | |
| 335 else if (pid == 0) | |
| 336 { | |
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337 std::string child_msg; |
| 6321 | 338 |
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339 interactive = false; |
| 6321 | 340 |
| 341 // Child process | |
| 10411 | 342 gnulib::close (child_stdin[1]); |
| 343 gnulib::close (child_stdout[0]); | |
| 6321 | 344 |
| 345 if (dup2 (child_stdin[0], STDIN_FILENO) >= 0) | |
| 346 { | |
| 10411 | 347 gnulib::close (child_stdin[0]); |
| 6321 | 348 if (dup2 (child_stdout[1], STDOUT_FILENO) >= 0) |
| 349 { | |
| 10411 | 350 gnulib::close (child_stdout[1]); |
| 6321 | 351 if (execvp (cmd, args, child_msg) < 0) |
| 352 child_msg = "popen2 (child): unable to start process -- " + child_msg; | |
| 353 } | |
| 354 else | |
| 355 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; | |
| 356 } | |
| 357 else | |
| 358 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; | |
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359 |
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360 (*current_liboctave_error_handler) (child_msg.c_str ()); |
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361 |
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362 exit (0); |
| 6321 | 363 } |
| 364 else | |
| 365 { | |
| 366 // Parent process | |
| 10411 | 367 gnulib::close (child_stdin[0]); |
| 368 gnulib::close (child_stdout[1]); | |
| 369 | |
| 6321 | 370 #if defined (F_SETFL) && defined (O_NONBLOCK) |
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371 if (! sync_mode && octave_fcntl (child_stdout[0], F_SETFL, |
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372 O_NONBLOCK, msg) < 0) |
| 6321 | 373 msg = "popen2: error setting file mode -- " + msg; |
| 374 else | |
| 375 #endif | |
| 376 { | |
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377 fildes[0] = child_stdin[1]; |
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378 fildes[1] = child_stdout[0]; |
| 6321 | 379 return pid; |
| 380 } | |
| 381 } | |
| 10411 | 382 gnulib::close (child_stdout[0]); |
| 383 gnulib::close (child_stdout[1]); | |
| 6321 | 384 } |
| 385 else | |
| 386 msg = "popen2: pipe creation failed -- " + msg; | |
| 10411 | 387 |
| 388 gnulib::close (child_stdin[0]); | |
| 389 gnulib::close (child_stdin[1]); | |
| 6321 | 390 } |
| 391 else | |
| 392 msg = "popen2: pipe creation failed -- " + msg; | |
| 393 | |
| 394 return -1; | |
| 395 #endif | |
| 396 } | |
| 10259 | 397 |
| 398 int | |
| 399 octave_fcntl (int fd, int cmd, long arg) | |
| 400 { | |
| 401 std::string msg; | |
| 402 return octave_fcntl (fd, cmd, arg, msg); | |
| 403 } | |
| 404 | |
| 405 int | |
| 406 octave_fcntl (int fd, int cmd, long arg, std::string& msg) | |
| 407 { | |
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408 msg = ""; |
| 10259 | 409 |
| 410 int status = -1; | |
| 411 | |
| 10411 | 412 status = gnulib::fcntl (fd, cmd, arg); |
| 10259 | 413 |
| 414 if (status < 0) | |
| 10411 | 415 msg = gnulib::strerror (errno); |
| 10259 | 416 |
| 417 return status; | |
| 418 } |