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e93545dd GE |
1 | /*************************************************************************** |
2 | escape.cpp - escaping of strings | |
3 | ------------------- | |
4 | begin : Sun Nov 14 1999 | |
5 | copyright : (C) 1999 by Intra2net AG | |
6 | email : info@intra2net.com | |
7 | ***************************************************************************/ | |
8 | ||
6a93d84a | 9 | #include <list> |
e93545dd | 10 | #include <string> |
6a93d84a | 11 | #include <fstream> |
0a654ec0 | 12 | #include <sstream> |
e93545dd | 13 | #include <iostream> |
0a654ec0 | 14 | #include <stdexcept> |
e93545dd GE |
15 | |
16 | #include <sys/types.h> | |
17 | #include <sys/stat.h> | |
0a654ec0 | 18 | #include <dirent.h> |
e93545dd GE |
19 | #include <pwd.h> |
20 | #include <grp.h> | |
21 | #include <unistd.h> | |
0a654ec0 | 22 | #include <errno.h> |
e93545dd | 23 | |
6a93d84a TJ |
24 | #include <boost/scoped_array.hpp> |
25 | #include "filefunc.hxx" | |
26 | #include "stringfunc.hxx" | |
27 | ||
a287a306 TJ |
28 | |
29 | namespace I2n | |
6a93d84a | 30 | { |
e93545dd GE |
31 | |
32 | using namespace std; | |
33 | ||
6a93d84a TJ |
34 | /* |
35 | ** implementation of Stat | |
36 | */ | |
37 | ||
38 | Stat::Stat() | |
a287a306 | 39 | : Valid(false) |
0107a75b | 40 | { |
a287a306 | 41 | clear(); |
6a93d84a TJ |
42 | } // eo Stat::Stat() |
43 | ||
44 | ||
45 | Stat::Stat(const std::string& path, bool follow_links) | |
46 | { | |
47 | stat(path,follow_links); | |
48 | } // eo Stat::Stat(const std::string&,bool) | |
49 | ||
50 | ||
51 | Stat::~Stat() | |
52 | { | |
53 | } // eo Stat::~Stat() | |
54 | ||
55 | ||
56 | /** | |
57 | * @brief updates the internal data. | |
58 | * | |
59 | * In other words: stat()'s the file again. | |
60 | */ | |
61 | void Stat::recheck() | |
62 | { | |
a287a306 | 63 | if (! Path.empty()) |
6a93d84a | 64 | { |
a287a306 | 65 | stat(Path, FollowLinks); |
6a93d84a TJ |
66 | } |
67 | } // eo Stat::recheck() | |
68 | ||
69 | ||
70 | /** | |
71 | * @brief calls stat() or lstat() to get the information for the given path | |
72 | * and stores that information. | |
73 | * @param path the path which should be checked | |
74 | * @param follow_links determine if (symbalic) links should be followed. | |
75 | */ | |
76 | void Stat::stat(const std::string& path, bool follow_links) | |
77 | { | |
78 | clear(); | |
a287a306 TJ |
79 | Path= path; |
80 | FollowLinks= follow_links; | |
6a93d84a TJ |
81 | struct stat stat_info; |
82 | int res; | |
83 | res = ( follow_links ? ::stat(path.c_str(), &stat_info) : ::lstat(path.c_str(), &stat_info) ); | |
84 | if ( 0 == res ) | |
85 | { | |
a287a306 TJ |
86 | Device = stat_info.st_dev; |
87 | Inode = stat_info.st_ino; | |
88 | Mode = (stat_info.st_mode & ~(S_IFMT)); | |
89 | NumLinks = stat_info.st_nlink; | |
90 | Uid = stat_info.st_uid; | |
91 | Gid = stat_info.st_gid; | |
92 | DeviceType = stat_info.st_rdev; | |
93 | Size = stat_info.st_size; | |
94 | Atime = stat_info.st_atime; | |
95 | Mtime = stat_info.st_mtime; | |
96 | Ctime = stat_info.st_atime; | |
97 | ||
98 | IsLink= S_ISLNK( stat_info.st_mode ); | |
99 | IsRegular= S_ISREG( stat_info.st_mode ); | |
100 | IsDirectory= S_ISDIR( stat_info.st_mode ); | |
101 | IsCharacterDevice= S_ISCHR( stat_info.st_mode ); | |
6ab3bc95 | 102 | IsBlockDevice= S_ISBLK( stat_info.st_mode ); |
a287a306 TJ |
103 | IsFifo= S_ISFIFO( stat_info.st_mode ); |
104 | IsSocket= S_ISSOCK( stat_info.st_mode ); | |
6a93d84a | 105 | } |
a287a306 | 106 | Valid = (0 == res); |
6a93d84a | 107 | } // eo Stat::stat(const std::string&,bool) |
0a654ec0 | 108 | |
0107a75b | 109 | |
6a93d84a TJ |
110 | /** |
111 | * @brief clears the internal data. | |
112 | */ | |
113 | void Stat::clear() | |
114 | { | |
a287a306 TJ |
115 | Path.clear(); |
116 | Valid= false; | |
117 | ||
118 | Device = 0; | |
119 | Inode = 0; | |
120 | Mode = 0; | |
121 | NumLinks = 0; | |
122 | Uid = 0; | |
123 | Gid = 0; | |
124 | DeviceType = 0; | |
125 | Size = 0; | |
126 | Atime = 0; | |
127 | Mtime = 0; | |
128 | Ctime = 0; | |
129 | ||
130 | IsLink= false; | |
131 | IsRegular= false; | |
132 | IsDirectory= false; | |
133 | IsCharacterDevice= false; | |
134 | IsBlockDevice= false; | |
135 | IsFifo= false; | |
136 | IsSocket= false; | |
6a93d84a TJ |
137 | } // eo Stat::clear() |
138 | ||
139 | ||
140 | /** | |
141 | * @brief checks if another instance describes the same file. | |
142 | * @param rhs the other instance. | |
143 | * @return @a true iff the other instance describes the same file. | |
144 | * @note | |
145 | * The "same file" means that the files are located on the same device and use the same inode. | |
146 | * They might still have two different directory entries (different paths)! | |
147 | */ | |
a287a306 | 148 | bool Stat::is_same_as(const Stat& rhs) |
6a93d84a | 149 | { |
a287a306 TJ |
150 | return Valid and rhs.Valid |
151 | and ( Device == rhs.Device) | |
152 | and ( Inode == rhs.Inode); | |
153 | } // eo Stat::is_same_as(const Stat& rhs); | |
6a93d84a TJ |
154 | |
155 | ||
156 | /** | |
157 | * @brief checks if this and the other instance describe the same device. | |
158 | * @param rhs the other instance. | |
159 | * @return @a true if we and the other instance describe a device and the same device. | |
160 | * | |
161 | * "Same device" means that the devices have the same type and the same major and minor id. | |
162 | */ | |
a287a306 | 163 | bool Stat::is_same_device_as(const Stat& rhs) |
6a93d84a | 164 | { |
a287a306 TJ |
165 | return is_device() and rhs.is_device() |
166 | and ( IsBlockDevice == rhs.IsBlockDevice ) | |
167 | and ( IsCharacterDevice == rhs.IsCharacterDevice ) | |
168 | and ( DeviceType == rhs.DeviceType); | |
169 | } // eo Stat::is_same_device_as(const Stat&) | |
6a93d84a TJ |
170 | |
171 | /** | |
172 | * @brief check existence of a path. | |
173 | * @param path path which should be tested. | |
174 | * @return @a true iff path exists. | |
175 | */ | |
176 | bool path_exists(const std::string& path) | |
177 | { | |
178 | struct stat stat_info; | |
179 | int res = ::stat(path.c_str(), &stat_info); | |
180 | if (res) return false; | |
181 | return true; | |
182 | } // eo path_exists(const std::string&) | |
183 | ||
184 | /** | |
185 | * @brief check existence of a regular file. | |
186 | * @param path path which should be tested. | |
187 | * @return @a true if path exists and is a regular file (or a link pointing to a regular file). | |
188 | * @note this checks for regular files; not for the pure exitsnace of a path; use pathExists() for that. | |
189 | * @see pathExists | |
190 | */ | |
191 | bool file_exists(const std::string& path) | |
192 | { | |
193 | struct stat stat_info; | |
194 | int res = ::stat(path.c_str(), &stat_info); | |
195 | if (res) return false; | |
196 | return S_ISREG(stat_info.st_mode); | |
197 | } // eo file_exists(const std::string&) | |
198 | ||
199 | // TODO: Use Stat class | |
200 | /** | |
201 | * Get size of file | |
202 | * @param name filename to get size for | |
203 | * @return file size or -1 if file does not exist | |
204 | */ | |
205 | long file_size (const string &name) | |
e93545dd GE |
206 | { |
207 | long iReturn = -1; | |
0a654ec0 | 208 | |
e93545dd | 209 | struct stat statbuff; |
0a654ec0 | 210 | |
e93545dd GE |
211 | if (lstat(name.c_str(), &statbuff) < 0) |
212 | return -1; | |
213 | ||
214 | if (!S_ISREG(statbuff.st_mode)) | |
215 | return -1; | |
0a654ec0 | 216 | |
e93545dd GE |
217 | iReturn=statbuff.st_size; |
218 | ||
219 | return iReturn; | |
220 | } | |
221 | ||
6a93d84a TJ |
222 | /** |
223 | * @brief tests the last modification time stamp of a path. | |
224 | * @param path path which should be tested. | |
225 | * @return the last modification time or 0 if the path doen't exist. | |
226 | */ | |
a287a306 | 227 | time_t file_mtime(const std::string& path) |
e93545dd | 228 | { |
6a93d84a TJ |
229 | struct stat stat_info; |
230 | int res = ::stat(path.c_str(), &stat_info); | |
231 | if (res) return 0; | |
232 | return stat_info.st_mtime; | |
6ab3bc95 | 233 | } // eo file_mtime(const std::string&) |
e93545dd | 234 | |
e93545dd | 235 | |
6a93d84a TJ |
236 | /** |
237 | * @brief reads the contents of a directory. | |
238 | * @param path the path to the directory whose contents should be read. | |
239 | * @param[out] result the resulting list of names. | |
240 | * @param include_dot_names determines if dot-files should be included in the list. | |
241 | * @return @a true if reading the directory was succesful, @a false on error. | |
242 | */ | |
a287a306 | 243 | bool get_dir( |
6a93d84a TJ |
244 | const std::string& path, |
245 | std::vector< std::string >& result, | |
246 | bool include_dot_names ) | |
247 | { | |
248 | DIR* dir = ::opendir( path.c_str()); | |
249 | if (!dir) | |
250 | { | |
251 | return false; | |
252 | } | |
253 | struct dirent *entry; | |
254 | while ( NULL != (entry = ::readdir(dir)) ) | |
e93545dd | 255 | { |
6a93d84a TJ |
256 | std::string name( entry->d_name ); |
257 | if (! include_dot_names && (name[0] == '.') ) | |
258 | { | |
259 | continue; | |
260 | } | |
261 | result.push_back( name ); | |
e93545dd | 262 | } |
6a93d84a TJ |
263 | ::closedir(dir); |
264 | return true; | |
6ab3bc95 | 265 | } // eo get_dir(const std::string&,std::vector< std::string >&,bool) |
6a93d84a TJ |
266 | |
267 | ||
268 | /** | |
269 | * @brief reads the contents of a directory | |
270 | * @param path the path to the directory whose contents should be read. | |
271 | * @param include_dot_names determines if dot-files should be included in the list. | |
272 | * @return the list of names (empty on error). | |
273 | */ | |
a287a306 | 274 | std::vector< std::string > get_dir(const std::string& path, bool include_dot_names ) |
6a93d84a TJ |
275 | { |
276 | std::vector< std::string > result; | |
a287a306 | 277 | get_dir(path,result,include_dot_names); |
6a93d84a | 278 | return result; |
6ab3bc95 | 279 | } // eo get_dir(const std::string&,bool) |
e93545dd | 280 | |
e93545dd | 281 | |
e93545dd | 282 | |
6a93d84a TJ |
283 | /** |
284 | * @brief removes a file from a filesystem. | |
285 | * @param path path to the file. | |
286 | * @return @a true iff the unlink was successful. | |
287 | */ | |
288 | bool unlink( const std::string& path ) | |
e93545dd | 289 | { |
6a93d84a TJ |
290 | int res = ::unlink( path.c_str() ); |
291 | return (res == 0); | |
292 | } // eo unlink(const std::string&) | |
293 | ||
e93545dd | 294 | |
e93545dd | 295 | |
6a93d84a TJ |
296 | /** |
297 | * @brief creates a symbolic link named @a link_name to @a target. | |
298 | * @param target the target the link should point to. | |
299 | * @param link_name the name of the link. | |
300 | * @param force if @a true, the (file or link) @a link_name is removed if it exists. | |
301 | * @return @a true iff the symlink was successfully created. | |
302 | */ | |
303 | bool symlink(const std::string& target, const std::string& link_name, bool force) | |
304 | { | |
305 | int res= -1; | |
306 | if (target.empty() or link_name.empty() or target == link_name) | |
307 | { | |
308 | // no, we don't do this! | |
e93545dd | 309 | return false; |
6a93d84a TJ |
310 | } |
311 | std::string n_target; | |
312 | if (target[0] == '/') // absolute target? | |
313 | { | |
314 | n_target= target; | |
315 | } | |
316 | else // relative target | |
317 | { | |
318 | // for stat'ing: prepend dir of link_name: | |
319 | n_target= dirname(link_name)+"/"+ target; | |
320 | } | |
321 | Stat target_stat(n_target, false); | |
322 | Stat link_name_stat(link_name, false); | |
323 | if (target_stat.exists() && link_name_stat.exists()) | |
324 | { | |
a287a306 TJ |
325 | if (link_name_stat.is_same_as(target_stat) |
326 | or link_name_stat.is_same_device_as(target_stat) ) | |
6a93d84a TJ |
327 | { |
328 | return false; | |
329 | } | |
330 | //TODO: more consistency checks?! | |
331 | } | |
332 | if (link_name_stat.exists()) | |
333 | { | |
334 | // the link name already exists. | |
335 | if (force) | |
336 | { | |
337 | // "force" as given, so try to remove the link_name: | |
338 | unlink(link_name); | |
339 | // update the stat: | |
340 | link_name_stat.recheck(); | |
341 | } | |
342 | } | |
343 | if (link_name_stat.exists()) | |
344 | { | |
345 | // well, if the link_name still exists; we cannot create that link: | |
346 | errno = EEXIST; | |
347 | return false; | |
348 | } | |
349 | res= ::symlink(target.c_str(), link_name.c_str()); | |
350 | return (0 == res); | |
351 | } // eo symlink(const std::string&,const std::string&,bool) | |
352 | ||
e93545dd | 353 | |
6a93d84a TJ |
354 | |
355 | /** | |
356 | * @brief reads the target of a symbolic link. | |
357 | * @param path path to the symbolic link | |
358 | * @return the target of the link or an empty string on error. | |
359 | */ | |
a287a306 | 360 | std::string read_link(const std::string& path) |
6a93d84a TJ |
361 | { |
362 | errno= 0; | |
363 | Stat stat(path,false); | |
a287a306 | 364 | if (!stat || !stat.is_link()) |
6a93d84a TJ |
365 | { |
366 | return std::string(); | |
367 | } | |
368 | int buffer_size= PATH_MAX+1 + 128; | |
369 | boost::scoped_array<char> buffer_ptr( new char[buffer_size] ); | |
370 | int res= ::readlink( path.c_str(), buffer_ptr.get(), buffer_size-1 ); | |
371 | if (res >= 0) | |
372 | { | |
373 | return std::string( buffer_ptr.get(), res ); | |
374 | } | |
375 | return std::string(); | |
6ab3bc95 | 376 | } // eo read_link(const std::string&) |
6a93d84a TJ |
377 | |
378 | ||
379 | ||
380 | /** | |
381 | * @brief returns content of a file as string. | |
382 | * | |
383 | * A simple (q'n'd) function for retrieving content of a file as string.<br> | |
384 | * Also able to read special (but regular) files which don't provide a size when stat'ed | |
385 | * (like files in the /proc filesystem). | |
386 | * | |
387 | * @param path path to the file. | |
388 | * @return the content of the file as string (empty if file could be opened). | |
389 | */ | |
a287a306 | 390 | std::string read_file(const std::string& path) |
6a93d84a TJ |
391 | { |
392 | Stat stat(path); | |
a287a306 | 393 | if (!stat.is_reg()) |
6a93d84a TJ |
394 | { |
395 | return std::string(); | |
396 | } | |
397 | std::ifstream f( path.c_str(), std::ios::in | std::ios::binary ); | |
398 | std::string result; | |
399 | if (f.is_open()) | |
400 | { | |
401 | // NOTE: there are cases where we don't know the correct size (/proc files...) | |
402 | // therefore we only use the size for reserving space if we know it, but don't | |
403 | // use it when reading the file! | |
404 | if (stat.size() > 0) | |
405 | { | |
406 | // if we know the size, we reserve enough space. | |
407 | result.reserve( stat.size() ); | |
408 | } | |
409 | char buffer[2048]; | |
410 | while (f.good()) | |
411 | { | |
412 | f.read(buffer, sizeof(buffer)); | |
413 | result.append(buffer, f.gcount()); | |
414 | } | |
415 | } | |
416 | return result; | |
6ab3bc95 | 417 | } // eo read_file(const std::string&) |
6a93d84a TJ |
418 | |
419 | ||
420 | /** | |
421 | * @brief writes a string to a file. | |
422 | * @param path path to the file | |
423 | * @param data the data which should be written into the file | |
424 | * @return @a true if the data was written to the file. | |
425 | * | |
426 | * A simple (q'n'd) function for writing a string to a file. | |
427 | */ | |
a287a306 | 428 | bool write_file(const std::string& path, const std::string& data) |
6a93d84a TJ |
429 | { |
430 | std::ofstream f( path.c_str(), std::ios::out | std::ios::binary | std::ios::trunc); | |
431 | if (f.good()) | |
432 | { | |
433 | f.write( data.data(), data.size() ); | |
434 | return f.good(); | |
435 | } | |
e93545dd | 436 | else |
6a93d84a | 437 | { |
e93545dd | 438 | return false; |
6a93d84a | 439 | } |
6ab3bc95 | 440 | } // eo write_file(const std::string&,const std::string&) |
6a93d84a TJ |
441 | |
442 | ||
443 | /** | |
1a2fc4e8 TJ |
444 | * Copy file in 4k blocks from source to target. |
445 | * Overwrites the target if it already exists. | |
446 | * | |
447 | * On error the target file gets removed. | |
448 | * | |
449 | * @param src source file | |
450 | * @param dest target file | |
451 | * @return true if all is ok, false on error | |
452 | */ | |
453 | bool copy_file(const std::string& src, const std::string& dest) | |
454 | { | |
455 | std::ifstream input( src.c_str(), std::ios::in | std::ios::binary ); | |
456 | if (!input) | |
457 | return false; | |
458 | ||
459 | std::ofstream output( dest.c_str(), std::ios::out | std::ios::binary | std::ios::trunc); | |
460 | if (!output) | |
461 | return false; | |
462 | ||
463 | char buffer[4096]; | |
464 | while (input.good()) | |
465 | { | |
466 | input.read(buffer, sizeof(buffer)); | |
467 | output.write(buffer, input.gcount()); | |
468 | ||
469 | // Out of disc space? | |
470 | if (!output.good()) | |
471 | { | |
472 | output.close(); | |
473 | unlink(dest); | |
474 | return false; | |
475 | } | |
476 | } | |
477 | ||
478 | return true; | |
479 | } | |
480 | ||
481 | /** | |
6a93d84a TJ |
482 | * @brief returns the filename part of a path (last component) |
483 | * @param path the path. | |
484 | * @return the last component of the path. | |
485 | */ | |
486 | std::string basename(const std::string& path) | |
487 | { | |
488 | std::string::size_type pos= path.rfind('/'); | |
489 | if (pos != std::string::npos) | |
490 | { | |
491 | return path.substr(pos+1); | |
492 | } | |
493 | return path; | |
494 | } // eo basename(const std::string&) | |
495 | ||
496 | ||
497 | /** | |
498 | * @brief returns the directory part of a path. | |
499 | * @param path the path. | |
500 | * @return the directory part of the path. | |
501 | */ | |
502 | std::string dirname(const std::string& path) | |
503 | { | |
504 | std::string::size_type pos= path.rfind('/'); | |
505 | if (pos != std::string::npos) | |
506 | { | |
507 | std::string result(path,0,pos); | |
508 | if (result.empty()) | |
509 | { | |
510 | return "."; | |
511 | } | |
512 | return result; | |
513 | } | |
514 | return "."; | |
515 | } // eo dirname(const std::string&) | |
516 | ||
517 | ||
518 | /** | |
519 | * @brief normalizes a path. | |
520 | * | |
521 | * This method removes empty and "." elements. | |
522 | * It also resolves ".." parts by removing previous path elements if possible. | |
523 | * Leading ".." elements are preserved when a relative path was given; else they are removed. | |
524 | * Trailing slashes are removed. | |
525 | * | |
526 | * @param path the path which should be normalized. | |
527 | * @return the normalized path. | |
528 | */ | |
529 | ||
a287a306 | 530 | std::string normalize_path(const std::string& path) |
6a93d84a TJ |
531 | { |
532 | if (path.empty()) | |
533 | { | |
534 | return std::string(); | |
535 | } | |
536 | // remember if the given path was absolute since this information vanishes when | |
537 | // we split the path (since we split with omitting empty parts...) | |
538 | bool is_absolute= (path[0]=='/'); | |
539 | std::list< std::string > parts; | |
540 | std::list< std::string > result_parts; | |
541 | ||
6ab3bc95 | 542 | split_string(path,parts,"/",true); |
6a93d84a TJ |
543 | |
544 | for(std::list< std::string >::const_iterator it_parts= parts.begin(); | |
545 | it_parts != parts.end(); | |
546 | ++it_parts) | |
547 | { | |
548 | std::string part(*it_parts); //convenience.. | |
549 | if (part == std::string(".") ) | |
550 | { | |
551 | // single dot is "current path"; ignore! | |
552 | continue; | |
553 | } | |
554 | if (part == std::string("..") ) | |
555 | { | |
556 | // double dot is "one part back" | |
557 | if (result_parts.empty()) | |
558 | { | |
559 | if (is_absolute) | |
560 | { | |
561 | // ignore since we cannot move behind / on absolute paths... | |
562 | } | |
563 | else | |
564 | { | |
565 | // on relative path, we need to store the "..": | |
566 | result_parts.push_back(part); | |
567 | } | |
568 | } | |
569 | else if (result_parts.back() == std::string("..") ) | |
570 | { | |
571 | // if last element was already "..", we need to store the new one again... | |
572 | // (PS: no need for "absolute" check; this can only be the case on relative path) | |
573 | result_parts.push_back(part); | |
574 | } | |
575 | else | |
576 | { | |
577 | // remove last element. | |
578 | result_parts.pop_back(); | |
579 | } | |
580 | continue; | |
581 | } | |
582 | result_parts.push_back(part); | |
583 | } | |
584 | std::string result; | |
585 | if (is_absolute) | |
586 | { | |
587 | result= "/"; | |
588 | } | |
6ab3bc95 | 589 | result+= join_string(result_parts,"/"); |
6a93d84a | 590 | return result; |
6ab3bc95 | 591 | } // eo normalize_path(const std::string&) |
6a93d84a TJ |
592 | |
593 | ||
594 | /** | |
595 | * @brief changes the file(/path) mode. | |
596 | * @param path the path to change the mode for. | |
597 | * @param mode the new file mode. | |
598 | * @return @a true iff the file mode was sucessfully changed. | |
599 | */ | |
600 | bool chmod(const std::string& path, int mode) | |
601 | { | |
602 | int res= ::chmod(path.c_str(), mode); | |
603 | return (res==0); | |
604 | } // eo chmod(const std::string&,int) | |
605 | ||
606 | ||
607 | /** | |
608 | * @brief changed the owner of a file(/path) | |
609 | * @param path the path to change the owner for. | |
610 | * @param user the new file owner. | |
611 | * @param group the new file group. | |
612 | * @return @a true iff the file owner was succesfully changed. | |
613 | * | |
614 | * @note | |
615 | * the validity of user and group within the system is not checked. | |
616 | * This is intentional since this way we can use id's which are not assigned. | |
617 | */ | |
a287a306 | 618 | bool chown(const std::string& path, const I2n::User& user, const I2n::Group& group) |
6a93d84a | 619 | { |
a287a306 | 620 | uid_t uid= user.Uid; |
6a93d84a | 621 | if (uid<0) return false; |
a287a306 TJ |
622 | gid_t gid= group.Gid; |
623 | if (gid<0) gid= user.Gid; | |
6a93d84a TJ |
624 | if (gid<0) return false; |
625 | int res= ::chown( path.c_str(), uid, gid); | |
626 | return (res==0); | |
627 | } // eo chown(const std::string&,const User&,const Group&) | |
e93545dd | 628 | |
0a654ec0 TJ |
629 | /** |
630 | * Recursive delete of files and directories | |
631 | * @param path File or directory to delete | |
632 | * @param error Will contain the error if the return value is false | |
633 | * @return true on success, false otherwise | |
634 | */ | |
635 | bool recursive_delete(const std::string &path, std::string *error) | |
636 | { | |
637 | bool rtn = true; | |
638 | ||
639 | try { | |
640 | struct stat my_stat; | |
641 | if (stat(path.c_str(), &my_stat) != 0) { | |
642 | throw runtime_error("can't stat " + path); | |
643 | } | |
644 | ||
645 | if (S_ISDIR(my_stat.st_mode)) { | |
646 | DIR *dir = opendir(path.c_str()); | |
647 | if (!dir) { | |
648 | throw runtime_error("can't open directory " + path); | |
649 | } | |
650 | ||
651 | struct dirent *entry; | |
652 | while ((entry = readdir(dir))) { | |
653 | string filename = entry->d_name; | |
654 | if (filename == "." || filename == "..") { | |
655 | continue; | |
656 | } | |
657 | ||
658 | // Delete subdir or file. | |
659 | rtn = recursive_delete(path + "/" + filename, error); | |
660 | if (rtn == false) { | |
661 | break; | |
662 | } | |
663 | } | |
664 | ||
665 | closedir(dir); | |
666 | if (rmdir(path.c_str()) != 0) { | |
667 | throw runtime_error("can't remove directory " + path); | |
668 | } | |
669 | } else { | |
670 | if (unlink(path.c_str()) != 0) { | |
671 | throw runtime_error("can't unlink " + path); | |
672 | } | |
673 | } | |
674 | } catch (exception &e) { | |
675 | if (error) { | |
676 | ostringstream out; | |
677 | out << e.what() << " (" << strerror(errno) << ")"; | |
678 | *error = out.str(); | |
679 | } | |
680 | rtn = false; | |
681 | } catch (...) { | |
682 | if (error) { | |
683 | ostringstream out; | |
684 | out << "unknown error (" << strerror(errno) << ")"; | |
685 | *error = out.str(); | |
686 | } | |
687 | rtn = false; | |
688 | } | |
e93545dd | 689 | |
0a654ec0 | 690 | return rtn; |
6ab3bc95 | 691 | } // eo recursive_delete(const std::string&,std::string*) |
6a93d84a | 692 | |
6ab3bc95 | 693 | } // eo namespace I2n |