Mercurial > octave
annotate liboctave/oct-env.cc @ 10447:12d25a1d84bf
Use gnulib headers instead of C++ std headers where needed.
| author | David Grundberg <davidg@cs.umu.se> |
|---|---|
| date | Wed, 24 Mar 2010 17:27:58 +0100 |
| parents | 479cc8a0a846 |
| children | bbe99b2a5ba7 |
| rev | line source |
|---|---|
| 2926 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2006, |
| 8920 | 4 2007, 2008 John W. Eaton |
| 2926 | 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. | |
| 2926 | 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/>. | |
| 2926 | 21 |
| 22 */ | |
| 23 | |
| 24 /* | |
| 25 | |
| 26 The functions listed below were adapted from a similar functions | |
| 27 from GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 | |
| 28 Free Software Foundation, Inc. | |
| 29 | |
| 30 octave_env::do_absolute_pathname | |
| 31 octave_env::do_base_pathname | |
| 32 octave_env::do_chdir | |
| 33 octave_env::do_getcwd | |
| 34 octave_env::do_make_absolute | |
| 35 octave_env::do_polite_directory_format | |
| 36 octave_env::pathname_backup | |
| 37 | |
| 38 */ | |
| 39 | |
| 40 #ifdef HAVE_CONFIG_H | |
| 41 #include <config.h> | |
| 42 #endif | |
| 43 | |
| 4093 | 44 #include <cctype> |
| 2926 | 45 #include <cstdlib> |
|
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46 #include "string.h" |
| 4093 | 47 |
| 3504 | 48 #include <string> |
| 2926 | 49 |
| 50 #include <sys/types.h> | |
| 51 #include <unistd.h> | |
| 52 | |
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53 #include "progname.h" |
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54 |
| 4097 | 55 #include "file-ops.h" |
| 2926 | 56 #include "lo-error.h" |
| 57 #include "lo-sysdep.h" | |
| 58 #include "lo-utils.h" | |
| 59 #include "oct-env.h" | |
| 2934 | 60 #include "oct-passwd.h" |
| 2947 | 61 #include "oct-syscalls.h" |
| 2926 | 62 |
| 63 octave_env::octave_env (void) | |
| 64 : follow_symbolic_links (true), verbatim_pwd (true), | |
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65 current_directory (), prog_name (), prog_invocation_name (), |
| 2926 | 66 user_name (), host_name () |
| 67 { | |
| 68 // Get a real value for the current directory. | |
| 69 do_getcwd (); | |
| 70 | |
| 71 // Etc. | |
| 72 do_get_user_name (); | |
| 73 | |
| 74 do_get_host_name (); | |
| 75 } | |
| 76 | |
| 77 octave_env *octave_env::instance = 0; | |
| 78 | |
| 79 bool | |
| 80 octave_env::instance_ok (void) | |
| 81 { | |
| 82 bool retval = true; | |
| 83 | |
| 84 if (! instance) | |
| 85 instance = new octave_env (); | |
| 86 | |
| 87 if (! instance) | |
| 88 { | |
| 89 (*current_liboctave_error_handler) | |
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90 ("unable to create current working directory object!"); |
| 2926 | 91 |
| 92 retval = false; | |
| 93 } | |
| 94 | |
| 95 return retval; | |
| 96 } | |
| 97 | |
| 3504 | 98 std::string |
| 99 octave_env::polite_directory_format (const std::string& name) | |
| 2926 | 100 { |
| 101 return (instance_ok ()) | |
| 3504 | 102 ? instance->do_polite_directory_format (name) : std::string (); |
| 2926 | 103 } |
| 104 | |
| 105 bool | |
| 3504 | 106 octave_env::absolute_pathname (const std::string& s) |
| 2926 | 107 { |
| 108 return (instance_ok ()) | |
| 109 ? instance->do_absolute_pathname (s) : false; | |
| 110 } | |
| 111 | |
| 6838 | 112 bool |
| 113 octave_env::rooted_relative_pathname (const std::string& s) | |
| 114 { | |
| 115 return (instance_ok ()) | |
| 116 ? instance->do_rooted_relative_pathname (s) : false; | |
| 117 } | |
| 118 | |
| 3504 | 119 std::string |
| 120 octave_env::base_pathname (const std::string& s) | |
| 2926 | 121 { |
| 122 return (instance_ok ()) | |
| 3504 | 123 ? instance->do_base_pathname (s) : std::string (); |
| 2926 | 124 } |
| 125 | |
| 3504 | 126 std::string |
| 127 octave_env::make_absolute (const std::string& s, const std::string& dot_path) | |
| 2926 | 128 { |
| 129 return (instance_ok ()) | |
| 3504 | 130 ? instance->do_make_absolute (s, dot_path) : std::string (); |
| 2926 | 131 } |
| 132 | |
| 3504 | 133 std::string |
| 10250 | 134 octave_env::get_current_directory () |
| 2926 | 135 { |
| 136 return (instance_ok ()) | |
| 3504 | 137 ? instance->do_getcwd () : std::string (); |
| 2926 | 138 } |
| 139 | |
| 3504 | 140 std::string |
| 2926 | 141 octave_env::get_home_directory () |
| 142 { | |
| 143 return (instance_ok ()) | |
| 3504 | 144 ? instance->do_get_home_directory () : std::string (); |
| 2926 | 145 } |
| 146 | |
| 3504 | 147 std::string |
| 2926 | 148 octave_env::get_program_name (void) |
| 149 { | |
| 150 return (instance_ok ()) | |
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151 ? instance->prog_name : std::string (); |
| 2926 | 152 } |
| 153 | |
| 3504 | 154 std::string |
| 2926 | 155 octave_env::get_program_invocation_name (void) |
| 156 { | |
| 157 return (instance_ok ()) | |
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158 ? instance->prog_invocation_name : std::string (); |
| 2926 | 159 } |
| 160 | |
| 161 void | |
| 3504 | 162 octave_env::set_program_name (const std::string& s) |
| 2926 | 163 { |
| 164 if (instance_ok ()) | |
| 165 instance->do_set_program_name (s); | |
| 166 } | |
| 167 | |
| 3504 | 168 std::string |
| 2926 | 169 octave_env::get_user_name (void) |
| 170 { | |
| 171 return (instance_ok ()) | |
| 3504 | 172 ? instance->do_get_user_name () : std::string (); |
| 2926 | 173 } |
| 174 | |
| 3504 | 175 std::string |
| 2926 | 176 octave_env::get_host_name (void) |
| 177 { | |
| 178 return (instance_ok ()) | |
| 3504 | 179 ? instance->do_get_host_name () : std::string (); |
| 2926 | 180 } |
| 181 | |
| 5775 | 182 // FIXME -- this leaves no way to distinguish between a |
| 2926 | 183 // variable that is not set and one that is set to the empty string. |
| 184 // Is this a problem? | |
| 185 | |
| 3504 | 186 std::string |
| 187 octave_env::getenv (const std::string& name) | |
| 2926 | 188 { |
| 189 return (instance_ok ()) | |
| 3504 | 190 ? instance->do_getenv (name) : std::string (); |
| 2926 | 191 } |
| 192 | |
| 193 void | |
| 3504 | 194 octave_env::putenv (const std::string& name, const std::string& value) |
| 2926 | 195 { |
| 196 octave_putenv (name, value); | |
| 197 } | |
| 198 | |
| 199 bool | |
| 5489 | 200 octave_env::have_x11_display (void) |
| 201 { | |
| 202 std::string display = getenv ("DISPLAY"); | |
| 203 | |
| 204 return ! display.empty (); | |
| 205 } | |
| 206 | |
| 207 bool | |
| 3504 | 208 octave_env::chdir (const std::string& newdir) |
| 2926 | 209 { |
| 210 return (instance_ok ()) | |
| 211 ? instance->do_chdir (newdir) : false; | |
| 212 } | |
| 213 | |
| 214 void | |
| 3504 | 215 octave_env::do_set_program_name (const std::string& s) const |
| 2926 | 216 { |
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217 // For gnulib. |
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218 ::set_program_name (s.c_str ()); |
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219 |
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220 // Let gnulib strip off things like the "lt-" prefix from libtool. |
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221 prog_invocation_name = program_name; |
| 2926 | 222 |
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223 size_t pos |
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224 = prog_invocation_name.find_last_of (file_ops::dir_sep_chars ()); |
| 2926 | 225 |
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226 // Also keep a shortened version of the program name. |
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227 prog_name = (pos == std::string::npos) |
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228 ? prog_invocation_name : prog_invocation_name.substr (pos+1); |
| 2926 | 229 } |
| 230 | |
| 231 // Return a pretty pathname. If the first part of the pathname is the | |
| 232 // same as $HOME, then replace that with `~'. | |
| 233 | |
| 3504 | 234 std::string |
| 235 octave_env::do_polite_directory_format (const std::string& name) const | |
| 2926 | 236 { |
| 3504 | 237 std::string retval; |
| 2926 | 238 |
| 3504 | 239 std::string home_dir = do_get_home_directory (); |
| 2926 | 240 |
| 241 size_t len = home_dir.length (); | |
| 242 | |
| 3516 | 243 if (len > 1 && home_dir == name.substr (0, len) |
| 4097 | 244 && (name.length () == len || file_ops::is_dir_sep (name[len]))) |
| 2926 | 245 { |
| 246 retval = "~"; | |
| 247 retval.append (name.substr (len)); | |
| 248 } | |
| 249 else | |
| 250 retval = name; | |
| 251 | |
| 252 return retval; | |
| 253 } | |
| 254 | |
| 255 bool | |
| 3504 | 256 octave_env::do_absolute_pathname (const std::string& s) const |
| 2926 | 257 { |
| 4087 | 258 size_t len = s.length (); |
| 259 | |
| 260 if (len == 0) | |
| 261 return false; | |
| 2926 | 262 |
| 4097 | 263 if (file_ops::is_dir_sep (s[0])) |
| 2926 | 264 return true; |
| 265 | |
| 4101 | 266 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) |
| 4088 | 267 if ((len == 2 && isalpha (s[0]) && s[1] == ':') |
| 4097 | 268 || (len > 2 && isalpha (s[0]) && s[1] == ':' |
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269 && file_ops::is_dir_sep (s[2]))) |
| 4087 | 270 return true; |
| 271 #endif | |
| 272 | |
| 2926 | 273 return false; |
| 274 } | |
| 275 | |
| 6838 | 276 bool |
| 277 octave_env::do_rooted_relative_pathname (const std::string& s) const | |
| 278 { | |
| 279 size_t len = s.length (); | |
| 280 | |
| 281 if (len == 0) | |
| 282 return false; | |
| 283 | |
| 284 if (len == 1 && s[0] == '.') | |
| 285 return true; | |
| 286 | |
| 287 if (len > 1 && s[0] == '.' && file_ops::is_dir_sep (s[1])) | |
| 288 return true; | |
| 289 | |
| 290 if (len == 2 && s[0] == '.' && s[1] == '.') | |
| 291 return true; | |
| 292 | |
| 293 if (len > 2 && s[0] == '.' && s[1] == '.' && file_ops::is_dir_sep (s[2])) | |
| 294 return true; | |
| 295 | |
| 296 return false; | |
| 297 } | |
| 298 | |
| 2926 | 299 // Return the `basename' of the pathname in STRING (the stuff after |
| 4097 | 300 // the last directory separator). If STRING is not a full pathname, |
| 301 // simply return it. | |
| 2926 | 302 |
| 3504 | 303 std::string |
| 304 octave_env::do_base_pathname (const std::string& s) const | |
| 2926 | 305 { |
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306 if (! (do_absolute_pathname (s) || do_rooted_relative_pathname (s))) |
| 2926 | 307 return s; |
| 308 | |
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309 size_t pos = s.find_last_of (file_ops::dir_sep_chars ()); |
| 2926 | 310 |
| 8021 | 311 if (pos == std::string::npos) |
| 2926 | 312 return s; |
| 313 else | |
| 314 return s.substr (pos+1); | |
| 315 } | |
| 316 | |
| 317 // Turn STRING (a pathname) into an absolute pathname, assuming that | |
| 4097 | 318 // DOT_PATH contains the symbolic location of the current directory. |
| 2926 | 319 |
| 3504 | 320 std::string |
| 321 octave_env::do_make_absolute (const std::string& s, | |
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322 const std::string& dot_path) const |
| 2926 | 323 { |
| 324 #if defined (__EMX__) | |
| 325 if (s.length () > 1 && s[1] == ':') | |
| 326 return s; | |
| 327 #endif | |
| 328 | |
| 4087 | 329 if (dot_path.empty () || s.empty () || do_absolute_pathname (s)) |
| 2926 | 330 return s; |
| 331 | |
| 4097 | 332 std::string current_dir = dot_path; |
| 2926 | 333 |
| 4097 | 334 if (current_dir.empty ()) |
| 335 current_dir = do_getcwd (); | |
| 2926 | 336 |
| 4097 | 337 size_t pos = current_dir.length () - 1; |
| 2926 | 338 |
| 4097 | 339 if (! file_ops::is_dir_sep (current_dir[pos])) |
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340 current_dir.append (file_ops::dir_sep_str ()); |
| 4097 | 341 |
| 5775 | 342 // FIXME -- this is probably not correct for all systems. |
| 2926 | 343 |
| 344 size_t i = 0; | |
| 345 size_t slen = s.length (); | |
| 346 | |
| 347 while (i < slen) | |
| 348 { | |
| 349 if (s[i] == '.') | |
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350 { |
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351 if (i + 1 == slen) |
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352 return current_dir; |
| 2926 | 353 |
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354 if (file_ops::is_dir_sep (s[i+1])) |
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355 { |
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356 i += 2; |
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357 continue; |
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358 } |
| 2926 | 359 |
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360 if (s[i+1] == '.' |
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361 && (i + 2 == slen || file_ops::is_dir_sep (s[i+2]))) |
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362 { |
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363 i += 2; |
| 2926 | 364 |
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365 if (i != slen) |
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366 i++; |
| 2926 | 367 |
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368 pathname_backup (current_dir, 1); |
| 2926 | 369 |
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370 continue; |
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371 } |
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372 } |
| 2926 | 373 |
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374 size_t tmp = s.find_first_of (file_ops::dir_sep_chars (), i); |
| 2926 | 375 |
| 8021 | 376 if (tmp == std::string::npos) |
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377 { |
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378 current_dir.append (s, i, tmp-i); |
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379 break; |
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380 } |
| 2926 | 381 else |
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382 { |
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383 current_dir.append (s, i, tmp-i+1); |
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384 i = tmp + 1; |
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385 } |
| 2926 | 386 } |
| 387 | |
| 4097 | 388 return current_dir; |
| 2926 | 389 } |
| 390 | |
| 4097 | 391 // Return a string which is the current working directory. |
| 2926 | 392 |
| 3504 | 393 std::string |
| 4097 | 394 octave_env::do_getcwd () const |
| 2926 | 395 { |
| 396 if (! follow_symbolic_links) | |
| 397 current_directory = ""; | |
| 398 | |
| 399 if (verbatim_pwd || current_directory.empty ()) | |
| 400 current_directory = ::octave_getcwd (); | |
| 401 | |
| 402 return current_directory; | |
| 403 } | |
| 404 | |
| 405 // This value is not cached because it can change while Octave is | |
| 406 // running. | |
| 407 | |
| 3504 | 408 std::string |
| 2926 | 409 octave_env::do_get_home_directory (void) const |
| 410 { | |
| 3504 | 411 std::string hd = do_getenv ("HOME"); |
| 2926 | 412 |
| 6096 | 413 #if defined (__MINGW32__) || defined (_MSC_VER) |
| 414 // Maybe we are started directly from cmd.exe. | |
| 5451 | 415 if (hd.empty ()) |
| 5454 | 416 { |
| 417 std::string drv = do_getenv ("HOMEDRIVE"); | |
| 418 if (drv.empty ()) | |
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419 hd = do_getenv ("HOMEPATH"); |
| 5454 | 420 else |
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421 hd = drv + do_getenv ("HOMEPATH"); |
| 5454 | 422 } |
| 5451 | 423 #endif |
| 424 | |
| 2947 | 425 if (hd.empty ()) |
| 426 { | |
| 427 octave_passwd pw = octave_passwd::getpwuid (octave_syscalls::getuid ()); | |
| 428 | |
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429 hd = pw ? pw.dir () : std::string (file_ops::dir_sep_str ()); |
| 2947 | 430 } |
| 431 | |
| 432 return hd; | |
| 2926 | 433 } |
| 434 | |
| 3504 | 435 std::string |
| 2926 | 436 octave_env::do_get_user_name (void) const |
| 437 { | |
| 438 if (user_name.empty ()) | |
| 439 { | |
| 2947 | 440 octave_passwd pw = octave_passwd::getpwuid (octave_syscalls::getuid ()); |
| 2926 | 441 |
| 3504 | 442 user_name = pw ? pw.name () : std::string ("unknown"); |
| 2926 | 443 } |
| 444 | |
| 445 return user_name; | |
| 446 } | |
| 447 | |
| 3504 | 448 std::string |
| 2926 | 449 octave_env::do_get_host_name (void) const |
| 450 { | |
| 451 if (host_name.empty ()) | |
| 452 { | |
| 453 char hostname[256]; | |
| 454 | |
| 3803 | 455 int status = octave_gethostname (hostname, 255); |
| 2926 | 456 |
| 3185 | 457 host_name = (status < 0) ? "unknown" : hostname; |
| 2926 | 458 } |
| 459 | |
| 460 return host_name; | |
| 461 } | |
| 462 | |
| 3504 | 463 std::string |
| 464 octave_env::do_getenv (const std::string& name) const | |
| 2926 | 465 { |
| 466 char *value = ::getenv (name.c_str ()); | |
| 467 | |
| 468 return value ? value : ""; | |
| 469 } | |
| 470 | |
| 471 // Do the work of changing to the directory NEWDIR. Handle symbolic | |
| 472 // link following, etc. | |
| 473 | |
| 474 bool | |
| 3504 | 475 octave_env::do_chdir (const std::string& newdir) |
| 2926 | 476 { |
| 477 bool retval = false; | |
| 478 | |
| 3504 | 479 std::string tmp; |
| 2926 | 480 |
| 481 if (follow_symbolic_links) | |
| 482 { | |
| 483 if (current_directory.empty ()) | |
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484 do_getcwd (); |
| 2926 | 485 |
| 486 if (current_directory.empty ()) | |
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487 tmp = newdir; |
| 2926 | 488 else |
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489 tmp = do_make_absolute (newdir, current_directory); |
| 2926 | 490 |
| 4097 | 491 // Get rid of trailing directory separator. |
| 2926 | 492 |
| 493 size_t len = tmp.length (); | |
| 494 | |
| 495 if (len > 1) | |
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496 { |
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497 if (file_ops::is_dir_sep (tmp[--len])) |
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498 tmp.resize (len); |
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499 } |
| 2926 | 500 |
| 501 if (! ::octave_chdir (tmp)) | |
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502 { |
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503 current_directory = tmp; |
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504 retval = true; |
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505 } |
| 2926 | 506 } |
| 507 else | |
| 508 retval = (! ::octave_chdir (newdir)); | |
| 509 | |
| 510 return retval; | |
| 511 } | |
| 512 | |
| 513 // Remove the last N directories from PATH. | |
| 514 | |
| 515 void | |
| 3504 | 516 octave_env::pathname_backup (std::string& path, int n) const |
| 2926 | 517 { |
| 518 if (path.empty ()) | |
| 519 return; | |
| 520 | |
| 521 size_t i = path.length () - 1; | |
| 522 | |
| 523 while (n--) | |
| 524 { | |
| 4097 | 525 while (file_ops::is_dir_sep (path[i]) && i > 0) |
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526 i--; |
| 2926 | 527 |
| 4097 | 528 while (! file_ops::is_dir_sep (path[i]) && i > 0) |
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529 i--; |
| 2926 | 530 |
| 531 i++; | |
| 532 } | |
| 533 | |
| 534 path.resize (i); | |
| 535 } | |
| 536 | |
| 537 void | |
| 538 octave_env::error (int err_num) const | |
| 539 { | |
| 10411 | 540 (*current_liboctave_error_handler) ("%s", gnulib::strerror (err_num)); |
| 2926 | 541 } |
| 542 | |
| 543 void | |
| 3504 | 544 octave_env::error (const std::string& s) const |
| 2926 | 545 { |
| 546 (*current_liboctave_error_handler) ("%s", s.c_str ()); | |
| 547 } |