Mercurial > octave-nkf
annotate liboctave/file-ops.cc @ 8009:d936b21b3a6b
file_ops: use singleton class for static data members
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 05 Aug 2008 12:14:16 -0400 |
| parents | a2ab20ba78f7 |
| children | 4a7a943581d0 |
| rev | line source |
|---|---|
| 1765 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
| 4 2007 John W. Eaton | |
| 1765 | 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. | |
| 1765 | 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/>. | |
| 1765 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 28 #include <cerrno> | |
| 1802 | 29 #include <cstdio> |
| 30 #include <cstdlib> | |
| 1765 | 31 #include <cstring> |
| 32 | |
| 3503 | 33 #include <iostream> |
| 4726 | 34 #include <vector> |
| 3040 | 35 |
| 2443 | 36 #ifdef HAVE_SYS_TYPES_H |
| 1765 | 37 #include <sys/types.h> |
| 2443 | 38 #endif |
| 2926 | 39 |
| 40 #ifdef HAVE_UNISTD_H | |
| 1765 | 41 #include <unistd.h> |
| 42 #endif | |
| 43 | |
| 5476 | 44 #include "dir-ops.h" |
| 1765 | 45 #include "file-ops.h" |
| 5476 | 46 #include "file-stat.h" |
| 2926 | 47 #include "oct-env.h" |
| 2934 | 48 #include "oct-passwd.h" |
| 3710 | 49 #include "pathlen.h" |
| 5476 | 50 #include "quit.h" |
| 1775 | 51 #include "statdefs.h" |
| 2926 | 52 #include "str-vec.h" |
| 1765 | 53 |
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54 file_ops::static_members *file_ops::static_members::instance = 0; |
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55 |
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56 file_ops::static_members::static_members (void) |
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57 : |
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58 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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59 xdir_sep_char ('\\'), |
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60 xdir_sep_str ("\\"), |
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61 #else |
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62 xdir_sep_char ('/'), |
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63 xdir_sep_str ("/"), |
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64 #endif |
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65 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) |
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66 xdir_sep_chars ("/\\") |
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67 #else |
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68 xdir_sep_chars (xdir_sep_str) |
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69 #endif |
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70 { } |
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71 |
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72 bool |
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73 file_ops::static_members::instance_ok (void) |
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74 { |
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75 bool retval = true; |
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76 |
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77 if (! instance) |
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78 instance = new static_members (); |
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79 |
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80 if (! instance) |
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81 { |
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82 (*current_liboctave_error_handler) |
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83 ("unable to create file_ops::static_members object!"); |
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84 |
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85 retval = false; |
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86 } |
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87 |
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88 return retval; |
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89 } |
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90 |
| 2937 | 91 #define NOT_SUPPORTED(nm) \ |
| 4062 | 92 nm ": not supported on this system" |
| 2937 | 93 |
| 2433 | 94 // We provide a replacement for mkdir(). |
| 95 | |
| 1765 | 96 int |
| 3504 | 97 file_ops::mkdir (const std::string& name, mode_t mode) |
| 1765 | 98 { |
| 3504 | 99 std::string msg; |
| 2937 | 100 return mkdir (name, mode, msg); |
| 1765 | 101 } |
| 102 | |
| 2668 | 103 int |
| 3504 | 104 file_ops::mkdir (const std::string& name, mode_t mode, std::string& msg) |
| 2668 | 105 { |
| 3504 | 106 msg = std::string (); |
| 2668 | 107 |
| 2937 | 108 int status = -1; |
| 109 | |
| 110 #if defined (HAVE_MKDIR) | |
| 4081 | 111 |
| 112 #if defined (MKDIR_TAKES_ONE_ARG) | |
| 113 status = ::mkdir (name.c_str ()); | |
| 114 #else | |
| 2937 | 115 status = ::mkdir (name.c_str (), mode); |
| 4081 | 116 #endif |
| 2668 | 117 |
| 118 if (status < 0) | |
| 3504 | 119 { |
| 120 using namespace std; | |
| 121 msg = ::strerror (errno); | |
| 122 } | |
| 2937 | 123 #else |
| 124 msg = NOT_SUPPORTED ("mkdir"); | |
| 125 #endif | |
| 2668 | 126 |
| 127 return status; | |
| 128 } | |
| 129 | |
| 2433 | 130 // I don't know how to emulate this on systems that don't provide it. |
| 131 | |
| 1765 | 132 int |
| 3504 | 133 file_ops::mkfifo (const std::string& name, mode_t mode) |
| 1765 | 134 { |
| 3504 | 135 std::string msg; |
| 2937 | 136 return mkfifo (name, mode, msg); |
| 1765 | 137 } |
| 138 | |
| 2668 | 139 int |
| 3504 | 140 file_ops::mkfifo (const std::string& name, mode_t mode, std::string& msg) |
| 2668 | 141 { |
| 3504 | 142 msg = std::string (); |
| 2668 | 143 |
| 2937 | 144 int status = -1; |
| 145 | |
| 2668 | 146 #if defined (HAVE_MKFIFO) |
| 2937 | 147 status = ::mkfifo (name.c_str (), mode); |
| 2668 | 148 |
| 149 if (status < 0) | |
| 3504 | 150 { |
| 151 using namespace std; | |
| 152 msg = ::strerror (errno); | |
| 153 } | |
| 2937 | 154 #else |
| 155 msg = NOT_SUPPORTED ("mkfifo"); | |
| 156 #endif | |
| 2668 | 157 |
| 158 return status; | |
| 159 } | |
| 160 | |
| 3710 | 161 // I don't know how to emulate this on systems that don't provide it. |
| 162 | |
| 163 int | |
| 164 file_ops::link (const std::string& old_name, const std::string& new_name) | |
| 165 { | |
| 166 std::string msg; | |
| 167 return link (old_name, new_name, msg); | |
| 168 } | |
| 169 | |
| 170 int | |
| 171 file_ops::link (const std::string& old_name, | |
| 172 const std::string& new_name, std::string& msg) | |
| 173 { | |
| 174 msg = std::string (); | |
| 175 | |
| 176 int status = -1; | |
| 177 | |
| 178 #if defined (HAVE_LINK) | |
| 179 status = ::link (old_name.c_str (), new_name.c_str ()); | |
| 180 | |
| 181 if (status < 0) | |
| 182 { | |
| 183 using namespace std; | |
| 184 msg = ::strerror (errno); | |
| 185 } | |
| 186 #else | |
| 187 msg = NOT_SUPPORTED ("link"); | |
| 188 #endif | |
| 189 | |
| 190 return status; | |
| 191 } | |
| 192 | |
| 193 // I don't know how to emulate this on systems that don't provide it. | |
| 194 | |
| 195 int | |
| 196 file_ops::symlink (const std::string& old_name, const std::string& new_name) | |
| 197 { | |
| 198 std::string msg; | |
| 199 return symlink (old_name, new_name, msg); | |
| 200 } | |
| 201 | |
| 202 int | |
| 203 file_ops::symlink (const std::string& old_name, | |
| 204 const std::string& new_name, std::string& msg) | |
| 205 { | |
| 206 msg = std::string (); | |
| 207 | |
| 208 int status = -1; | |
| 209 | |
| 210 #if defined (HAVE_SYMLINK) | |
| 4577 | 211 |
| 212 OCTAVE_LOCAL_BUFFER (char, old_nm, old_name.length ()); | |
| 213 OCTAVE_LOCAL_BUFFER (char, new_nm, new_name.length ()); | |
| 214 | |
| 215 strcpy (old_nm, old_name.c_str ()); | |
| 216 strcpy (new_nm, new_name.c_str ()); | |
| 217 | |
| 218 status = ::symlink (old_nm, new_nm); | |
| 3710 | 219 |
| 220 if (status < 0) | |
| 221 { | |
| 222 using namespace std; | |
| 223 msg = ::strerror (errno); | |
| 224 } | |
| 225 #else | |
| 226 msg = NOT_SUPPORTED ("symlink"); | |
| 227 #endif | |
| 228 | |
| 229 return status; | |
| 230 } | |
| 231 | |
| 232 // We provide a replacement for rename(). | |
| 233 | |
| 234 int | |
| 235 file_ops::readlink (const std::string& path, std::string& result) | |
| 236 { | |
| 237 std::string msg; | |
| 238 return readlink (path, result, msg); | |
| 239 } | |
| 240 | |
| 241 int | |
| 242 file_ops::readlink (const std::string& path, std::string& result, | |
| 243 std::string& msg) | |
| 244 { | |
| 245 int status = -1; | |
| 246 | |
| 247 msg = std::string (); | |
| 248 | |
| 4066 | 249 #if defined (HAVE_READLINK) |
| 3710 | 250 char buf[MAXPATHLEN+1]; |
| 251 | |
| 4577 | 252 OCTAVE_LOCAL_BUFFER (char, p, path.length ()); |
| 253 | |
| 254 strcpy (p, path.c_str ()); | |
| 255 | |
| 256 status = ::readlink (p, buf, MAXPATHLEN); | |
| 3710 | 257 |
| 258 if (status < 0) | |
| 259 { | |
| 260 using namespace std; | |
| 261 msg = ::strerror (errno); | |
| 262 } | |
| 263 else | |
| 264 { | |
| 265 buf[status] = '\0'; | |
| 3769 | 266 result = std::string (buf); |
| 3710 | 267 status = 0; |
| 268 } | |
| 269 #else | |
| 270 msg = NOT_SUPPORTED ("rename"); | |
| 271 #endif | |
| 272 | |
| 273 return status; | |
| 274 } | |
| 275 | |
| 2433 | 276 // We provide a replacement for rename(). |
| 277 | |
| 1765 | 278 int |
| 3504 | 279 file_ops::rename (const std::string& from, const std::string& to) |
| 1765 | 280 { |
| 3504 | 281 std::string msg; |
| 2937 | 282 return rename (from, to, msg); |
| 1765 | 283 } |
| 284 | |
| 2668 | 285 int |
| 3504 | 286 file_ops::rename (const std::string& from, const std::string& to, |
| 287 std::string& msg) | |
| 2668 | 288 { |
| 2937 | 289 int status = -1; |
| 290 | |
| 3504 | 291 msg = std::string (); |
| 2668 | 292 |
| 2937 | 293 #if defined (HAVE_RENAME) |
| 294 status = ::rename (from.c_str (), to.c_str ()); | |
| 2668 | 295 |
| 296 if (status < 0) | |
| 3504 | 297 { |
| 298 using namespace std; | |
| 299 msg = ::strerror (errno); | |
| 300 } | |
| 2937 | 301 #else |
| 302 msg = NOT_SUPPORTED ("rename"); | |
| 303 #endif | |
| 2668 | 304 |
| 305 return status; | |
| 306 } | |
| 307 | |
| 2433 | 308 // We provide a replacement for rmdir(). |
| 309 | |
| 1765 | 310 int |
| 3504 | 311 file_ops::rmdir (const std::string& name) |
| 1765 | 312 { |
| 3504 | 313 std::string msg; |
| 2937 | 314 return rmdir (name, msg); |
| 1765 | 315 } |
| 316 | |
| 2668 | 317 int |
| 3504 | 318 file_ops::rmdir (const std::string& name, std::string& msg) |
| 2668 | 319 { |
| 3504 | 320 msg = std::string (); |
| 2668 | 321 |
| 2937 | 322 int status = -1; |
| 323 | |
| 324 #if defined (HAVE_RMDIR) | |
| 325 status = ::rmdir (name.c_str ()); | |
| 2668 | 326 |
| 327 if (status < 0) | |
| 3504 | 328 { |
| 329 using namespace std; | |
| 330 msg = ::strerror (errno); | |
| 331 } | |
| 2937 | 332 #else |
| 333 msg = NOT_SUPPORTED ("rmdir"); | |
| 334 #endif | |
| 2668 | 335 |
| 336 return status; | |
| 337 } | |
| 338 | |
| 5476 | 339 // And a version that works recursively. |
| 340 | |
| 341 int | |
| 342 file_ops::recursive_rmdir (const std::string& name) | |
| 343 { | |
| 344 std::string msg; | |
| 345 return recursive_rmdir (name, msg); | |
| 346 } | |
| 347 | |
| 348 int | |
| 349 file_ops::recursive_rmdir (const std::string& name, std::string& msg) | |
| 350 { | |
| 351 msg = std::string (); | |
| 352 | |
| 353 int status = 0; | |
| 354 | |
| 355 dir_entry dir (name); | |
| 356 | |
| 357 if (dir) | |
| 358 { | |
| 359 string_vector dirlist = dir.read (); | |
| 360 | |
| 361 for (octave_idx_type i = 0; i < dirlist.length (); i++) | |
| 362 { | |
| 363 OCTAVE_QUIT; | |
| 364 | |
| 365 std::string nm = dirlist[i]; | |
| 366 | |
| 367 // Skip current directory and parent. | |
| 368 if (nm == "." || nm == "..") | |
| 369 continue; | |
| 370 | |
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371 std::string fullnm = name + file_ops::dir_sep_str () + nm; |
| 5476 | 372 |
| 373 // Get info about the file. Don't follow links. | |
| 374 file_stat fs (fullnm, false); | |
| 375 | |
| 376 if (fs) | |
| 377 { | |
| 378 if (fs.is_dir ()) | |
| 379 { | |
| 380 status = recursive_rmdir (fullnm, msg); | |
| 381 | |
| 382 if (status < 0) | |
| 383 break; | |
| 384 } | |
| 385 else | |
| 386 { | |
| 387 status = unlink (fullnm, msg); | |
| 388 | |
| 389 if (status < 0) | |
| 390 break; | |
| 391 } | |
| 392 } | |
| 393 else | |
| 394 { | |
| 395 msg = fs.error (); | |
| 396 break; | |
| 397 } | |
| 398 } | |
| 399 | |
| 400 if (status >= 0) | |
| 6363 | 401 { |
| 402 dir.close (); | |
| 403 status = file_ops::rmdir (name, msg); | |
| 404 } | |
| 5476 | 405 } |
| 406 else | |
| 407 { | |
| 408 status = -1; | |
| 409 | |
| 410 msg = dir.error (); | |
| 411 } | |
| 412 | |
| 413 return status; | |
| 414 } | |
| 415 | |
| 5138 | 416 std::string |
| 417 file_ops::canonicalize_file_name (const std::string& name) | |
| 418 { | |
| 419 std::string msg; | |
| 420 return canonicalize_file_name (name, msg); | |
| 421 } | |
| 422 | |
| 423 std::string | |
| 424 file_ops::canonicalize_file_name (const std::string& name, std::string& msg) | |
| 425 { | |
| 426 msg = std::string (); | |
| 427 | |
| 428 std::string retval; | |
| 429 | |
| 430 #if defined (HAVE_CANONICALIZE_FILE_NAME) | |
| 431 | |
| 432 char *tmp = ::canonicalize_file_name (name.c_str ()); | |
| 433 | |
| 434 if (tmp) | |
| 435 { | |
| 436 retval = tmp; | |
| 437 ::free (tmp); | |
| 438 } | |
| 439 | |
| 440 #elif defined (HAVE_RESOLVEPATH) | |
| 441 | |
| 442 #if !defined (errno) | |
| 443 extern int errno; | |
| 444 #endif | |
| 445 | |
| 446 #if !defined (__set_errno) | |
| 447 # define __set_errno(Val) errno = (Val) | |
| 448 #endif | |
| 449 | |
| 450 if (name.empty ()) | |
| 451 { | |
| 452 __set_errno (ENOENT); | |
| 453 return retval; | |
| 454 } | |
| 455 | |
| 456 // All known hosts with resolvepath (e.g. Solaris 7) don't turn | |
| 457 // relative names into absolute ones, so prepend the working | |
| 458 // directory if the path is not absolute. | |
| 459 | |
| 5149 | 460 std::string absolute_name |
| 461 = octave_env::make_absolute (name, octave_env::getcwd ()); | |
| 5138 | 462 |
| 5149 | 463 size_t resolved_size = absolute_name.length (); |
| 5138 | 464 |
| 6208 | 465 while (true) |
| 5138 | 466 { |
| 467 resolved_size = 2 * resolved_size + 1; | |
| 468 | |
| 469 OCTAVE_LOCAL_BUFFER (char, resolved, resolved_size); | |
| 470 | |
| 5149 | 471 int resolved_len |
| 472 = ::resolvepath (absolute_name.c_str (), resolved, resolved_size); | |
| 5138 | 473 |
| 474 if (resolved_len < 0) | |
| 475 break; | |
| 476 | |
| 477 if (resolved_len < resolved_size) | |
| 478 { | |
| 479 retval = resolved; | |
| 480 break; | |
| 481 } | |
| 482 } | |
| 483 | |
| 6208 | 484 #elif defined (__WIN32__) |
| 485 | |
| 486 int n = 1024; | |
| 487 | |
| 488 std::string win_path (n, '\0'); | |
| 489 | |
| 490 while (true) | |
| 491 { | |
| 7520 | 492 int status = GetFullPathName (name.c_str (), n, &win_path[0], 0); |
| 6208 | 493 |
| 494 if (status == 0) | |
| 495 break; | |
| 496 else if (status < n) | |
| 497 { | |
| 498 win_path.resize (status); | |
| 499 retval = win_path; | |
| 500 break; | |
| 501 } | |
| 502 else | |
| 503 { | |
| 504 n *= 2; | |
| 505 win_path.resize (n); | |
| 506 } | |
| 507 } | |
| 508 | |
| 6271 | 509 #elif defined (HAVE_REALPATH) |
| 510 | |
| 511 #if !defined (__set_errno) | |
| 512 # define __set_errno(Val) errno = (Val) | |
| 513 #endif | |
| 514 | |
| 515 if (name.empty ()) | |
| 516 { | |
| 517 __set_errno (ENOENT); | |
| 518 return retval; | |
| 519 } | |
| 520 | |
| 521 OCTAVE_LOCAL_BUFFER (char, buf, PATH_MAX); | |
| 522 | |
| 6273 | 523 if (::realpath (name.c_str (), buf)) |
| 524 retval = buf; | |
| 6271 | 525 |
| 5138 | 526 #else |
| 527 | |
| 5775 | 528 // FIXME -- provide replacement here... |
| 5138 | 529 retval = name; |
| 530 | |
| 531 #endif | |
| 532 | |
| 533 if (retval.empty ()) | |
| 534 { | |
| 535 using namespace std; | |
| 536 msg = ::strerror (errno); | |
| 537 } | |
| 538 | |
| 539 return retval; | |
| 540 } | |
| 541 | |
| 2433 | 542 // We provide a replacement for tempnam(). |
| 543 | |
| 3504 | 544 std::string |
| 545 file_ops::tempnam (const std::string& dir, const std::string& pfx) | |
| 1802 | 546 { |
| 3504 | 547 std::string msg; |
| 2937 | 548 return tempnam (dir, pfx, msg); |
| 549 } | |
| 550 | |
| 3504 | 551 std::string |
| 552 file_ops::tempnam (const std::string& dir, const std::string& pfx, | |
| 553 std::string& msg) | |
| 2937 | 554 { |
| 3504 | 555 msg = std::string (); |
| 2937 | 556 |
| 3504 | 557 std::string retval; |
| 2937 | 558 |
| 559 const char *pdir = dir.empty () ? 0 : dir.c_str (); | |
| 1802 | 560 |
| 2937 | 561 const char *ppfx = pfx.empty () ? 0 : pfx.c_str (); |
| 562 | |
| 563 char *tmp = ::tempnam (pdir, ppfx); | |
| 1802 | 564 |
| 565 if (tmp) | |
| 566 { | |
| 567 retval = tmp; | |
| 568 | |
| 2937 | 569 ::free (tmp); |
| 1802 | 570 } |
| 571 else | |
| 3504 | 572 { |
| 573 using namespace std; | |
| 574 msg = ::strerror (errno); | |
| 575 } | |
| 1802 | 576 |
| 577 return retval; | |
| 578 } | |
| 579 | |
| 3040 | 580 // The following tilde-expansion code was stolen and adapted from |
| 581 // readline. | |
| 2926 | 582 |
| 3040 | 583 // The default value of tilde_additional_prefixes. This is set to |
| 584 // whitespace preceding a tilde so that simple programs which do not | |
| 585 // perform any word separation get desired behaviour. | |
| 586 static const char *default_prefixes[] = { " ~", "\t~", ":~", 0 }; | |
| 587 | |
| 588 // The default value of tilde_additional_suffixes. This is set to | |
| 589 // whitespace or newline so that simple programs which do not perform | |
| 590 // any word separation get desired behaviour. | |
| 591 static const char *default_suffixes[] = { " ", "\n", ":", 0 }; | |
| 592 | |
| 593 // If non-null, this contains the address of a function that the | |
| 594 // application wants called before trying the standard tilde | |
| 595 // expansions. The function is called with the text sans tilde, and | |
| 596 // returns a malloc()'ed string which is the expansion, or a NULL | |
| 597 // pointer if the expansion fails. | |
| 598 file_ops::tilde_expansion_hook file_ops::tilde_expansion_preexpansion_hook = 0; | |
| 599 | |
| 600 // If non-null, this contains the address of a function to call if the | |
| 601 // standard meaning for expanding a tilde fails. The function is | |
| 602 // called with the text (sans tilde, as in "foo"), and returns a | |
| 603 // malloc()'ed string which is the expansion, or a NULL pointer if | |
| 604 // there is no expansion. | |
| 605 file_ops::tilde_expansion_hook file_ops::tilde_expansion_failure_hook = 0; | |
| 606 | |
| 607 // When non-null, this is a NULL terminated array of strings which are | |
| 608 // duplicates for a tilde prefix. Bash uses this to expand `=~' and | |
| 609 // `:~'. | |
| 610 string_vector file_ops::tilde_additional_prefixes = default_prefixes; | |
| 611 | |
| 612 // When non-null, this is a NULL terminated array of strings which | |
| 613 // match the end of a username, instead of just "/". Bash sets this | |
| 614 // to `:' and `=~'. | |
| 615 string_vector file_ops::tilde_additional_suffixes = default_suffixes; | |
| 616 | |
| 617 // Find the start of a tilde expansion in S, and return the index | |
| 618 // of the tilde which starts the expansion. Place the length of the | |
| 619 // text which identified this tilde starter in LEN, excluding the | |
| 620 // tilde itself. | |
| 621 | |
| 622 static size_t | |
| 3504 | 623 tilde_find_prefix (const std::string& s, size_t& len) |
| 3040 | 624 { |
| 625 len = 0; | |
| 626 | |
| 627 size_t s_len = s.length (); | |
| 628 | |
| 629 if (s_len == 0 || s[0] == '~') | |
| 630 return 0; | |
| 631 | |
| 632 string_vector prefixes = file_ops::tilde_additional_prefixes; | |
| 633 | |
| 634 if (! prefixes.empty ()) | |
| 635 { | |
| 636 for (size_t i = 0; i < s_len; i++) | |
| 637 { | |
| 638 for (int j = 0; j < prefixes.length (); j++) | |
| 639 { | |
| 640 size_t pfx_len = prefixes[j].length (); | |
| 641 | |
| 642 if (prefixes[j].compare (s.substr (i, pfx_len)) == 0) | |
| 643 { | |
| 644 len = pfx_len - 1; | |
| 645 return i + len; | |
| 646 } | |
| 647 } | |
| 648 } | |
| 649 } | |
| 650 | |
| 651 return s_len; | |
| 652 } | |
| 653 | |
| 654 // Find the end of a tilde expansion in S, and return the index | |
| 655 // of the character which ends the tilde definition. | |
| 656 | |
| 657 static size_t | |
| 3504 | 658 tilde_find_suffix (const std::string& s) |
| 3040 | 659 { |
| 660 size_t s_len = s.length (); | |
| 661 | |
| 662 string_vector suffixes = file_ops::tilde_additional_suffixes; | |
| 663 | |
| 664 size_t i = 0; | |
| 665 | |
| 666 for ( ; i < s_len; i++) | |
| 667 { | |
| 6694 | 668 if (file_ops::is_dir_sep (s[i])) |
| 3040 | 669 break; |
| 670 | |
| 671 if (! suffixes.empty ()) | |
| 672 { | |
| 673 for (int j = 0; j < suffixes.length (); j++) | |
| 674 { | |
| 675 size_t sfx_len = suffixes[j].length (); | |
| 676 | |
| 677 if (suffixes[j].compare (s.substr (i, sfx_len)) == 0) | |
| 678 return i; | |
| 679 } | |
| 680 } | |
| 681 } | |
| 682 | |
| 683 return i; | |
| 684 } | |
| 685 | |
| 686 // Take FNAME and return the tilde prefix we want expanded. | |
| 687 | |
| 3504 | 688 static std::string |
| 689 isolate_tilde_prefix (const std::string& fname) | |
| 3040 | 690 { |
| 691 size_t f_len = fname.length (); | |
| 692 | |
| 693 size_t len = 1; | |
| 694 | |
| 6694 | 695 while (len < f_len && ! file_ops::is_dir_sep (fname[len])) |
| 3040 | 696 len++; |
| 697 | |
| 698 return fname.substr (1, len); | |
| 699 } | |
| 700 | |
| 701 // Do the work of tilde expansion on FILENAME. FILENAME starts with a | |
| 702 // tilde. | |
| 703 | |
| 3504 | 704 static std::string |
| 705 tilde_expand_word (const std::string& filename) | |
| 3040 | 706 { |
| 707 size_t f_len = filename.length (); | |
| 708 | |
| 709 if (f_len == 0 || filename[0] != '~') | |
| 710 return filename; | |
| 711 | |
| 712 // A leading `~/' or a bare `~' is *always* translated to the value | |
| 713 // of $HOME or the home directory of the current user, regardless of | |
| 714 // any preexpansion hook. | |
| 715 | |
| 6694 | 716 if (f_len == 1 || file_ops::is_dir_sep (filename[1])) |
| 3040 | 717 return octave_env::get_home_directory () + filename.substr (1); |
| 718 | |
| 3504 | 719 std::string username = isolate_tilde_prefix (filename); |
| 3040 | 720 |
| 721 size_t user_len = username.length (); | |
| 722 | |
| 3504 | 723 std::string dirname; |
| 3040 | 724 |
| 725 if (file_ops::tilde_expansion_preexpansion_hook) | |
| 726 { | |
| 3504 | 727 std::string expansion |
| 3040 | 728 = file_ops::tilde_expansion_preexpansion_hook (username); |
| 729 | |
| 730 if (! expansion.empty ()) | |
| 3074 | 731 return expansion + filename.substr (user_len+1); |
| 3040 | 732 } |
| 733 | |
| 734 // No preexpansion hook, or the preexpansion hook failed. Look in the | |
| 735 // password database. | |
| 736 | |
| 737 octave_passwd pw = octave_passwd::getpwnam (username); | |
| 738 | |
| 739 if (! pw) | |
| 740 { | |
| 741 // If the calling program has a special syntax for expanding tildes, | |
| 742 // and we couldn't find a standard expansion, then let them try. | |
| 743 | |
| 744 if (file_ops::tilde_expansion_failure_hook) | |
| 745 { | |
| 3504 | 746 std::string expansion |
| 3040 | 747 = file_ops::tilde_expansion_failure_hook (username); |
| 748 | |
| 749 if (! expansion.empty ()) | |
| 3074 | 750 dirname = expansion + filename.substr (user_len+1); |
| 3040 | 751 } |
| 752 | |
| 753 // If we don't have a failure hook, or if the failure hook did not | |
| 754 // expand the tilde, return a copy of what we were passed. | |
| 755 | |
| 756 if (dirname.length () == 0) | |
| 757 dirname = filename; | |
| 758 } | |
| 759 else | |
| 3074 | 760 dirname = pw.dir () + filename.substr (user_len+1); |
| 3040 | 761 |
| 762 return dirname; | |
| 763 } | |
| 764 | |
| 765 // If NAME has a leading ~ or ~user, Unix-style, expand it to the | |
| 766 // user's home directory. If no ~, or no <pwd.h>, just return NAME. | |
| 767 | |
| 3504 | 768 std::string |
| 769 file_ops::tilde_expand (const std::string& name) | |
| 2926 | 770 { |
| 3504 | 771 std::string result; |
| 2926 | 772 |
| 3040 | 773 size_t name_len = name.length (); |
| 2926 | 774 |
| 3040 | 775 // Scan through S expanding tildes as we come to them. |
| 2926 | 776 |
| 3040 | 777 size_t pos = 0; |
| 2926 | 778 |
| 3040 | 779 while (1) |
| 780 { | |
| 781 if (pos > name_len) | |
| 782 break; | |
| 2926 | 783 |
| 3040 | 784 size_t len; |
| 785 | |
| 786 // Make START point to the tilde which starts the expansion. | |
| 2926 | 787 |
| 3040 | 788 size_t start = tilde_find_prefix (name.substr (pos), len); |
| 789 | |
| 790 result.append (name.substr (pos, start)); | |
| 2926 | 791 |
| 3040 | 792 // Advance STRING to the starting tilde. |
| 793 | |
| 794 pos += start; | |
| 2926 | 795 |
| 3040 | 796 // Make FINI be the index of one after the last character of the |
| 797 // username. | |
| 2926 | 798 |
| 3040 | 799 size_t fini = tilde_find_suffix (name.substr (pos)); |
| 2926 | 800 |
| 3040 | 801 // If both START and FINI are zero, we are all done. |
| 2926 | 802 |
| 3040 | 803 if (! (start || fini)) |
| 804 break; | |
| 2926 | 805 |
| 3040 | 806 // Expand the entire tilde word, and copy it into RESULT. |
| 2947 | 807 |
| 3504 | 808 std::string tilde_word = name.substr (pos, fini); |
| 3040 | 809 |
| 810 pos += fini; | |
| 2926 | 811 |
| 3504 | 812 std::string expansion = tilde_expand_word (tilde_word); |
| 3040 | 813 |
| 814 result.append (expansion); | |
| 2926 | 815 } |
| 816 | |
| 3040 | 817 return result; |
| 2926 | 818 } |
| 819 | |
| 820 // A vector version of the above. | |
| 821 | |
| 822 string_vector | |
| 823 file_ops::tilde_expand (const string_vector& names) | |
| 824 { | |
| 825 string_vector retval; | |
| 826 | |
| 827 int n = names.length (); | |
| 828 | |
| 829 retval.resize (n); | |
| 830 | |
| 831 for (int i = 0; i < n; i++) | |
| 832 retval[i] = file_ops::tilde_expand (names[i]); | |
| 833 | |
| 834 return retval; | |
| 835 } | |
| 1802 | 836 |
| 1765 | 837 int |
| 2926 | 838 file_ops::umask (mode_t mode) |
| 1765 | 839 { |
| 840 #if defined (HAVE_UMASK) | |
| 2926 | 841 return ::umask (mode); |
| 1765 | 842 #else |
| 843 return 0; | |
| 844 #endif | |
| 845 } | |
| 846 | |
| 1773 | 847 int |
| 3504 | 848 file_ops::unlink (const std::string& name) |
| 1773 | 849 { |
| 3504 | 850 std::string msg; |
| 2937 | 851 return unlink (name, msg); |
| 1773 | 852 } |
| 853 | |
| 2668 | 854 int |
| 3504 | 855 file_ops::unlink (const std::string& name, std::string& msg) |
| 2668 | 856 { |
| 3504 | 857 msg = std::string (); |
| 2668 | 858 |
| 2937 | 859 int status = -1; |
| 860 | |
| 861 #if defined (HAVE_UNLINK) | |
| 862 status = ::unlink (name.c_str ()); | |
| 2668 | 863 |
| 864 if (status < 0) | |
| 3504 | 865 { |
| 866 using namespace std; | |
| 867 msg = ::strerror (errno); | |
| 868 } | |
| 2937 | 869 #else |
| 870 msg = NOT_SUPPORTED ("unlink"); | |
| 871 #endif | |
| 2668 | 872 |
| 873 return status; | |
| 874 } | |
| 875 | |
| 7272 | 876 std::string |
| 877 file_ops::concat (const std::string& dir, const std::string& file) | |
| 878 { | |
| 879 return dir.empty () | |
| 880 ? file | |
| 881 : (is_dir_sep (dir[dir.length()-1]) | |
| 882 ? dir + file | |
|
8007
a2ab20ba78f7
make file_ops a proper singleton class
John W. Eaton <jwe@octave.org>
parents:
7520
diff
changeset
|
883 : dir + file_ops::dir_sep_char () + file); |
| 7272 | 884 } |
| 885 | |
| 1765 | 886 /* |
| 887 ;;; Local Variables: *** | |
| 888 ;;; mode: C++ *** | |
| 889 ;;; End: *** | |
| 890 */ |