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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> |
5efd35b1 | 23 | #include <string.h> |
e93545dd | 24 | |
6a93d84a TJ |
25 | #include <boost/scoped_array.hpp> |
26 | #include "filefunc.hxx" | |
27 | #include "stringfunc.hxx" | |
28 | ||
a287a306 TJ |
29 | |
30 | namespace I2n | |
6a93d84a | 31 | { |
e93545dd GE |
32 | |
33 | using namespace std; | |
34 | ||
6a93d84a TJ |
35 | /* |
36 | ** implementation of Stat | |
37 | */ | |
38 | ||
39 | Stat::Stat() | |
a287a306 | 40 | : Valid(false) |
0107a75b | 41 | { |
a287a306 | 42 | clear(); |
6a93d84a TJ |
43 | } // eo Stat::Stat() |
44 | ||
45 | ||
46 | Stat::Stat(const std::string& path, bool follow_links) | |
47 | { | |
48 | stat(path,follow_links); | |
49 | } // eo Stat::Stat(const std::string&,bool) | |
50 | ||
51 | ||
52 | Stat::~Stat() | |
53 | { | |
54 | } // eo Stat::~Stat() | |
55 | ||
56 | ||
57 | /** | |
58 | * @brief updates the internal data. | |
59 | * | |
60 | * In other words: stat()'s the file again. | |
61 | */ | |
62 | void Stat::recheck() | |
63 | { | |
a287a306 | 64 | if (! Path.empty()) |
6a93d84a | 65 | { |
96fe2dc5 GE |
66 | // pass a copy of Path: otherwise clear() would leave an empty reference |
67 | stat(string(Path), FollowLinks); | |
6a93d84a TJ |
68 | } |
69 | } // eo Stat::recheck() | |
70 | ||
71 | ||
72 | /** | |
73 | * @brief calls stat() or lstat() to get the information for the given path | |
74 | * and stores that information. | |
75 | * @param path the path which should be checked | |
76 | * @param follow_links determine if (symbalic) links should be followed. | |
77 | */ | |
78 | void Stat::stat(const std::string& path, bool follow_links) | |
79 | { | |
80 | clear(); | |
a287a306 TJ |
81 | Path= path; |
82 | FollowLinks= follow_links; | |
6a93d84a TJ |
83 | struct stat stat_info; |
84 | int res; | |
85 | res = ( follow_links ? ::stat(path.c_str(), &stat_info) : ::lstat(path.c_str(), &stat_info) ); | |
86 | if ( 0 == res ) | |
87 | { | |
a287a306 TJ |
88 | Device = stat_info.st_dev; |
89 | Inode = stat_info.st_ino; | |
90 | Mode = (stat_info.st_mode & ~(S_IFMT)); | |
91 | NumLinks = stat_info.st_nlink; | |
92 | Uid = stat_info.st_uid; | |
93 | Gid = stat_info.st_gid; | |
94 | DeviceType = stat_info.st_rdev; | |
95 | Size = stat_info.st_size; | |
96 | Atime = stat_info.st_atime; | |
97 | Mtime = stat_info.st_mtime; | |
98 | Ctime = stat_info.st_atime; | |
99 | ||
100 | IsLink= S_ISLNK( stat_info.st_mode ); | |
101 | IsRegular= S_ISREG( stat_info.st_mode ); | |
102 | IsDirectory= S_ISDIR( stat_info.st_mode ); | |
103 | IsCharacterDevice= S_ISCHR( stat_info.st_mode ); | |
6ab3bc95 | 104 | IsBlockDevice= S_ISBLK( stat_info.st_mode ); |
a287a306 TJ |
105 | IsFifo= S_ISFIFO( stat_info.st_mode ); |
106 | IsSocket= S_ISSOCK( stat_info.st_mode ); | |
6a93d84a | 107 | } |
a287a306 | 108 | Valid = (0 == res); |
6a93d84a | 109 | } // eo Stat::stat(const std::string&,bool) |
0a654ec0 | 110 | |
0107a75b | 111 | |
6a93d84a TJ |
112 | /** |
113 | * @brief clears the internal data. | |
114 | */ | |
115 | void Stat::clear() | |
116 | { | |
a287a306 TJ |
117 | Path.clear(); |
118 | Valid= false; | |
119 | ||
120 | Device = 0; | |
121 | Inode = 0; | |
122 | Mode = 0; | |
123 | NumLinks = 0; | |
124 | Uid = 0; | |
125 | Gid = 0; | |
126 | DeviceType = 0; | |
127 | Size = 0; | |
128 | Atime = 0; | |
129 | Mtime = 0; | |
130 | Ctime = 0; | |
131 | ||
132 | IsLink= false; | |
133 | IsRegular= false; | |
134 | IsDirectory= false; | |
135 | IsCharacterDevice= false; | |
136 | IsBlockDevice= false; | |
137 | IsFifo= false; | |
138 | IsSocket= false; | |
6a93d84a TJ |
139 | } // eo Stat::clear() |
140 | ||
141 | ||
142 | /** | |
143 | * @brief checks if another instance describes the same file. | |
144 | * @param rhs the other instance. | |
145 | * @return @a true iff the other instance describes the same file. | |
146 | * @note | |
147 | * The "same file" means that the files are located on the same device and use the same inode. | |
148 | * They might still have two different directory entries (different paths)! | |
149 | */ | |
a287a306 | 150 | bool Stat::is_same_as(const Stat& rhs) |
6a93d84a | 151 | { |
a287a306 TJ |
152 | return Valid and rhs.Valid |
153 | and ( Device == rhs.Device) | |
154 | and ( Inode == rhs.Inode); | |
155 | } // eo Stat::is_same_as(const Stat& rhs); | |
6a93d84a TJ |
156 | |
157 | ||
158 | /** | |
159 | * @brief checks if this and the other instance describe the same device. | |
160 | * @param rhs the other instance. | |
161 | * @return @a true if we and the other instance describe a device and the same device. | |
162 | * | |
163 | * "Same device" means that the devices have the same type and the same major and minor id. | |
164 | */ | |
a287a306 | 165 | bool Stat::is_same_device_as(const Stat& rhs) |
6a93d84a | 166 | { |
a287a306 TJ |
167 | return is_device() and rhs.is_device() |
168 | and ( IsBlockDevice == rhs.IsBlockDevice ) | |
169 | and ( IsCharacterDevice == rhs.IsCharacterDevice ) | |
170 | and ( DeviceType == rhs.DeviceType); | |
171 | } // eo Stat::is_same_device_as(const Stat&) | |
6a93d84a TJ |
172 | |
173 | /** | |
174 | * @brief check existence of a path. | |
175 | * @param path path which should be tested. | |
176 | * @return @a true iff path exists. | |
177 | */ | |
178 | bool path_exists(const std::string& path) | |
179 | { | |
180 | struct stat stat_info; | |
181 | int res = ::stat(path.c_str(), &stat_info); | |
182 | if (res) return false; | |
183 | return true; | |
184 | } // eo path_exists(const std::string&) | |
185 | ||
186 | /** | |
187 | * @brief check existence of a regular file. | |
188 | * @param path path which should be tested. | |
189 | * @return @a true if path exists and is a regular file (or a link pointing to a regular file). | |
190 | * @note this checks for regular files; not for the pure exitsnace of a path; use pathExists() for that. | |
191 | * @see pathExists | |
192 | */ | |
193 | bool file_exists(const std::string& path) | |
194 | { | |
195 | struct stat stat_info; | |
196 | int res = ::stat(path.c_str(), &stat_info); | |
197 | if (res) return false; | |
198 | return S_ISREG(stat_info.st_mode); | |
199 | } // eo file_exists(const std::string&) | |
200 | ||
201 | // TODO: Use Stat class | |
202 | /** | |
203 | * Get size of file | |
204 | * @param name filename to get size for | |
205 | * @return file size or -1 if file does not exist | |
206 | */ | |
207 | long file_size (const string &name) | |
e93545dd GE |
208 | { |
209 | long iReturn = -1; | |
0a654ec0 | 210 | |
e93545dd | 211 | struct stat statbuff; |
0a654ec0 | 212 | |
e93545dd GE |
213 | if (lstat(name.c_str(), &statbuff) < 0) |
214 | return -1; | |
215 | ||
216 | if (!S_ISREG(statbuff.st_mode)) | |
217 | return -1; | |
0a654ec0 | 218 | |
e93545dd GE |
219 | iReturn=statbuff.st_size; |
220 | ||
221 | return iReturn; | |
222 | } | |
223 | ||
6a93d84a TJ |
224 | /** |
225 | * @brief tests the last modification time stamp of a path. | |
226 | * @param path path which should be tested. | |
227 | * @return the last modification time or 0 if the path doen't exist. | |
228 | */ | |
a287a306 | 229 | time_t file_mtime(const std::string& path) |
e93545dd | 230 | { |
6a93d84a TJ |
231 | struct stat stat_info; |
232 | int res = ::stat(path.c_str(), &stat_info); | |
233 | if (res) return 0; | |
234 | return stat_info.st_mtime; | |
6ab3bc95 | 235 | } // eo file_mtime(const std::string&) |
e93545dd | 236 | |
e93545dd | 237 | |
6a93d84a TJ |
238 | /** |
239 | * @brief reads the contents of a directory. | |
240 | * @param path the path to the directory whose contents should be read. | |
241 | * @param[out] result the resulting list of names. | |
242 | * @param include_dot_names determines if dot-files should be included in the list. | |
243 | * @return @a true if reading the directory was succesful, @a false on error. | |
244 | */ | |
a287a306 | 245 | bool get_dir( |
6a93d84a TJ |
246 | const std::string& path, |
247 | std::vector< std::string >& result, | |
248 | bool include_dot_names ) | |
249 | { | |
250 | DIR* dir = ::opendir( path.c_str()); | |
251 | if (!dir) | |
252 | { | |
253 | return false; | |
254 | } | |
255 | struct dirent *entry; | |
256 | while ( NULL != (entry = ::readdir(dir)) ) | |
e93545dd | 257 | { |
6a93d84a TJ |
258 | std::string name( entry->d_name ); |
259 | if (! include_dot_names && (name[0] == '.') ) | |
260 | { | |
261 | continue; | |
262 | } | |
263 | result.push_back( name ); | |
e93545dd | 264 | } |
6a93d84a TJ |
265 | ::closedir(dir); |
266 | return true; | |
6ab3bc95 | 267 | } // eo get_dir(const std::string&,std::vector< std::string >&,bool) |
6a93d84a TJ |
268 | |
269 | ||
270 | /** | |
271 | * @brief reads the contents of a directory | |
272 | * @param path the path to the directory whose contents should be read. | |
273 | * @param include_dot_names determines if dot-files should be included in the list. | |
274 | * @return the list of names (empty on error). | |
275 | */ | |
a287a306 | 276 | std::vector< std::string > get_dir(const std::string& path, bool include_dot_names ) |
6a93d84a TJ |
277 | { |
278 | std::vector< std::string > result; | |
a287a306 | 279 | get_dir(path,result,include_dot_names); |
6a93d84a | 280 | return result; |
6ab3bc95 | 281 | } // eo get_dir(const std::string&,bool) |
e93545dd | 282 | |
e93545dd | 283 | |
e93545dd | 284 | |
6a93d84a TJ |
285 | /** |
286 | * @brief removes a file from a filesystem. | |
287 | * @param path path to the file. | |
288 | * @return @a true iff the unlink was successful. | |
289 | */ | |
290 | bool unlink( const std::string& path ) | |
e93545dd | 291 | { |
6a93d84a TJ |
292 | int res = ::unlink( path.c_str() ); |
293 | return (res == 0); | |
294 | } // eo unlink(const std::string&) | |
295 | ||
e93545dd | 296 | |
e93545dd | 297 | |
6a93d84a TJ |
298 | /** |
299 | * @brief creates a symbolic link named @a link_name to @a target. | |
300 | * @param target the target the link should point to. | |
301 | * @param link_name the name of the link. | |
302 | * @param force if @a true, the (file or link) @a link_name is removed if it exists. | |
303 | * @return @a true iff the symlink was successfully created. | |
304 | */ | |
305 | bool symlink(const std::string& target, const std::string& link_name, bool force) | |
306 | { | |
307 | int res= -1; | |
308 | if (target.empty() or link_name.empty() or target == link_name) | |
309 | { | |
310 | // no, we don't do this! | |
e93545dd | 311 | return false; |
6a93d84a TJ |
312 | } |
313 | std::string n_target; | |
314 | if (target[0] == '/') // absolute target? | |
315 | { | |
316 | n_target= target; | |
317 | } | |
318 | else // relative target | |
319 | { | |
320 | // for stat'ing: prepend dir of link_name: | |
321 | n_target= dirname(link_name)+"/"+ target; | |
322 | } | |
323 | Stat target_stat(n_target, false); | |
324 | Stat link_name_stat(link_name, false); | |
325 | if (target_stat.exists() && link_name_stat.exists()) | |
326 | { | |
a287a306 TJ |
327 | if (link_name_stat.is_same_as(target_stat) |
328 | or link_name_stat.is_same_device_as(target_stat) ) | |
6a93d84a TJ |
329 | { |
330 | return false; | |
331 | } | |
332 | //TODO: more consistency checks?! | |
333 | } | |
334 | if (link_name_stat.exists()) | |
335 | { | |
336 | // the link name already exists. | |
337 | if (force) | |
338 | { | |
339 | // "force" as given, so try to remove the link_name: | |
340 | unlink(link_name); | |
341 | // update the stat: | |
342 | link_name_stat.recheck(); | |
343 | } | |
344 | } | |
345 | if (link_name_stat.exists()) | |
346 | { | |
347 | // well, if the link_name still exists; we cannot create that link: | |
348 | errno = EEXIST; | |
349 | return false; | |
350 | } | |
351 | res= ::symlink(target.c_str(), link_name.c_str()); | |
352 | return (0 == res); | |
353 | } // eo symlink(const std::string&,const std::string&,bool) | |
354 | ||
e93545dd | 355 | |
6a93d84a TJ |
356 | |
357 | /** | |
358 | * @brief reads the target of a symbolic link. | |
359 | * @param path path to the symbolic link | |
360 | * @return the target of the link or an empty string on error. | |
361 | */ | |
a287a306 | 362 | std::string read_link(const std::string& path) |
6a93d84a TJ |
363 | { |
364 | errno= 0; | |
365 | Stat stat(path,false); | |
a287a306 | 366 | if (!stat || !stat.is_link()) |
6a93d84a TJ |
367 | { |
368 | return std::string(); | |
369 | } | |
370 | int buffer_size= PATH_MAX+1 + 128; | |
371 | boost::scoped_array<char> buffer_ptr( new char[buffer_size] ); | |
372 | int res= ::readlink( path.c_str(), buffer_ptr.get(), buffer_size-1 ); | |
373 | if (res >= 0) | |
374 | { | |
375 | return std::string( buffer_ptr.get(), res ); | |
376 | } | |
377 | return std::string(); | |
6ab3bc95 | 378 | } // eo read_link(const std::string&) |
6a93d84a TJ |
379 | |
380 | ||
381 | ||
382 | /** | |
383 | * @brief returns content of a file as string. | |
384 | * | |
385 | * A simple (q'n'd) function for retrieving content of a file as string.<br> | |
386 | * Also able to read special (but regular) files which don't provide a size when stat'ed | |
387 | * (like files in the /proc filesystem). | |
388 | * | |
389 | * @param path path to the file. | |
390 | * @return the content of the file as string (empty if file could be opened). | |
391 | */ | |
a287a306 | 392 | std::string read_file(const std::string& path) |
6a93d84a TJ |
393 | { |
394 | Stat stat(path); | |
a287a306 | 395 | if (!stat.is_reg()) |
6a93d84a TJ |
396 | { |
397 | return std::string(); | |
398 | } | |
399 | std::ifstream f( path.c_str(), std::ios::in | std::ios::binary ); | |
400 | std::string result; | |
401 | if (f.is_open()) | |
402 | { | |
403 | // NOTE: there are cases where we don't know the correct size (/proc files...) | |
404 | // therefore we only use the size for reserving space if we know it, but don't | |
405 | // use it when reading the file! | |
406 | if (stat.size() > 0) | |
407 | { | |
408 | // if we know the size, we reserve enough space. | |
409 | result.reserve( stat.size() ); | |
410 | } | |
411 | char buffer[2048]; | |
412 | while (f.good()) | |
413 | { | |
414 | f.read(buffer, sizeof(buffer)); | |
415 | result.append(buffer, f.gcount()); | |
416 | } | |
417 | } | |
418 | return result; | |
6ab3bc95 | 419 | } // eo read_file(const std::string&) |
6a93d84a TJ |
420 | |
421 | ||
422 | /** | |
423 | * @brief writes a string to a file. | |
424 | * @param path path to the file | |
425 | * @param data the data which should be written into the file | |
426 | * @return @a true if the data was written to the file. | |
427 | * | |
428 | * A simple (q'n'd) function for writing a string to a file. | |
429 | */ | |
a287a306 | 430 | bool write_file(const std::string& path, const std::string& data) |
6a93d84a TJ |
431 | { |
432 | std::ofstream f( path.c_str(), std::ios::out | std::ios::binary | std::ios::trunc); | |
433 | if (f.good()) | |
434 | { | |
435 | f.write( data.data(), data.size() ); | |
436 | return f.good(); | |
437 | } | |
e93545dd | 438 | else |
6a93d84a | 439 | { |
e93545dd | 440 | return false; |
6a93d84a | 441 | } |
6ab3bc95 | 442 | } // eo write_file(const std::string&,const std::string&) |
6a93d84a TJ |
443 | |
444 | ||
445 | /** | |
1a2fc4e8 TJ |
446 | * Copy file in 4k blocks from source to target. |
447 | * Overwrites the target if it already exists. | |
448 | * | |
449 | * On error the target file gets removed. | |
450 | * | |
451 | * @param src source file | |
452 | * @param dest target file | |
453 | * @return true if all is ok, false on error | |
454 | */ | |
455 | bool copy_file(const std::string& src, const std::string& dest) | |
456 | { | |
a1e7d2a7 GE |
457 | std::ifstream input( src.c_str(), std::ios::in | std::ios::binary ); |
458 | if (!input) | |
459 | return false; | |
460 | ||
461 | std::ofstream output( dest.c_str(), std::ios::out | std::ios::binary | std::ios::trunc); | |
462 | if (!output) | |
463 | return false; | |
464 | ||
465 | // Out of disc space? | |
466 | if (!copy_stream(input,output)) | |
467 | { | |
468 | output.close(); | |
469 | unlink(dest); | |
470 | return false; | |
471 | } | |
472 | ||
473 | return true; | |
474 | } | |
475 | ||
476 | /** | |
477 | * Copy streams in 4k blocks. | |
478 | * | |
479 | * @param is source stream | |
480 | * @param os target stream | |
481 | * @return true if all is ok, false on error | |
482 | */ | |
483 | bool copy_stream(std::istream& is, std::ostream& os) | |
484 | { | |
485 | if (!is) | |
1a2fc4e8 TJ |
486 | return false; |
487 | ||
a1e7d2a7 | 488 | if (!os) |
1a2fc4e8 TJ |
489 | return false; |
490 | ||
491 | char buffer[4096]; | |
a1e7d2a7 | 492 | while (is.good()) |
1a2fc4e8 | 493 | { |
a1e7d2a7 GE |
494 | is.read(buffer, sizeof(buffer)); |
495 | os.write(buffer, is.gcount()); | |
496 | ||
497 | // Can't write? | |
498 | if (!os.good()) | |
1a2fc4e8 | 499 | return false; |
1a2fc4e8 TJ |
500 | } |
501 | ||
502 | return true; | |
503 | } | |
504 | ||
505 | /** | |
6a93d84a TJ |
506 | * @brief returns the filename part of a path (last component) |
507 | * @param path the path. | |
508 | * @return the last component of the path. | |
509 | */ | |
510 | std::string basename(const std::string& path) | |
511 | { | |
512 | std::string::size_type pos= path.rfind('/'); | |
513 | if (pos != std::string::npos) | |
514 | { | |
515 | return path.substr(pos+1); | |
516 | } | |
517 | return path; | |
518 | } // eo basename(const std::string&) | |
519 | ||
520 | ||
521 | /** | |
522 | * @brief returns the directory part of a path. | |
523 | * @param path the path. | |
524 | * @return the directory part of the path. | |
525 | */ | |
526 | std::string dirname(const std::string& path) | |
527 | { | |
528 | std::string::size_type pos= path.rfind('/'); | |
529 | if (pos != std::string::npos) | |
530 | { | |
531 | std::string result(path,0,pos); | |
532 | if (result.empty()) | |
533 | { | |
534 | return "."; | |
535 | } | |
536 | return result; | |
537 | } | |
538 | return "."; | |
539 | } // eo dirname(const std::string&) | |
540 | ||
541 | ||
542 | /** | |
543 | * @brief normalizes a path. | |
544 | * | |
545 | * This method removes empty and "." elements. | |
546 | * It also resolves ".." parts by removing previous path elements if possible. | |
547 | * Leading ".." elements are preserved when a relative path was given; else they are removed. | |
548 | * Trailing slashes are removed. | |
549 | * | |
550 | * @param path the path which should be normalized. | |
551 | * @return the normalized path. | |
552 | */ | |
553 | ||
a287a306 | 554 | std::string normalize_path(const std::string& path) |
6a93d84a TJ |
555 | { |
556 | if (path.empty()) | |
557 | { | |
558 | return std::string(); | |
559 | } | |
560 | // remember if the given path was absolute since this information vanishes when | |
561 | // we split the path (since we split with omitting empty parts...) | |
562 | bool is_absolute= (path[0]=='/'); | |
563 | std::list< std::string > parts; | |
564 | std::list< std::string > result_parts; | |
565 | ||
6ab3bc95 | 566 | split_string(path,parts,"/",true); |
6a93d84a TJ |
567 | |
568 | for(std::list< std::string >::const_iterator it_parts= parts.begin(); | |
569 | it_parts != parts.end(); | |
570 | ++it_parts) | |
571 | { | |
572 | std::string part(*it_parts); //convenience.. | |
573 | if (part == std::string(".") ) | |
574 | { | |
575 | // single dot is "current path"; ignore! | |
576 | continue; | |
577 | } | |
578 | if (part == std::string("..") ) | |
579 | { | |
580 | // double dot is "one part back" | |
581 | if (result_parts.empty()) | |
582 | { | |
583 | if (is_absolute) | |
584 | { | |
585 | // ignore since we cannot move behind / on absolute paths... | |
586 | } | |
587 | else | |
588 | { | |
589 | // on relative path, we need to store the "..": | |
590 | result_parts.push_back(part); | |
591 | } | |
592 | } | |
593 | else if (result_parts.back() == std::string("..") ) | |
594 | { | |
595 | // if last element was already "..", we need to store the new one again... | |
596 | // (PS: no need for "absolute" check; this can only be the case on relative path) | |
597 | result_parts.push_back(part); | |
598 | } | |
599 | else | |
600 | { | |
601 | // remove last element. | |
602 | result_parts.pop_back(); | |
603 | } | |
604 | continue; | |
605 | } | |
606 | result_parts.push_back(part); | |
607 | } | |
608 | std::string result; | |
609 | if (is_absolute) | |
610 | { | |
611 | result= "/"; | |
612 | } | |
6ab3bc95 | 613 | result+= join_string(result_parts,"/"); |
6a93d84a | 614 | return result; |
6ab3bc95 | 615 | } // eo normalize_path(const std::string&) |
6a93d84a TJ |
616 | |
617 | ||
618 | /** | |
f002679a GE |
619 | * @brief calls fsync on a given directory to sync all it's metadata |
620 | * @param path the path of the directory. | |
621 | * @return true if successful | |
622 | */ | |
623 | bool dirsync(const std::string& path) | |
624 | { | |
625 | // sync the directory the file is in | |
626 | DIR* dir=opendir(path.c_str()); | |
627 | if (dir == NULL) | |
628 | return false; | |
629 | ||
630 | int ret=fsync(dirfd(dir)); | |
631 | ||
632 | closedir(dir); | |
633 | ||
634 | return (ret==0); | |
635 | } | |
636 | ||
637 | /** | |
6a93d84a TJ |
638 | * @brief changes the file(/path) mode. |
639 | * @param path the path to change the mode for. | |
640 | * @param mode the new file mode. | |
641 | * @return @a true iff the file mode was sucessfully changed. | |
642 | */ | |
643 | bool chmod(const std::string& path, int mode) | |
644 | { | |
645 | int res= ::chmod(path.c_str(), mode); | |
646 | return (res==0); | |
647 | } // eo chmod(const std::string&,int) | |
648 | ||
649 | ||
650 | /** | |
651 | * @brief changed the owner of a file(/path) | |
652 | * @param path the path to change the owner for. | |
653 | * @param user the new file owner. | |
654 | * @param group the new file group. | |
655 | * @return @a true iff the file owner was succesfully changed. | |
656 | * | |
657 | * @note | |
658 | * the validity of user and group within the system is not checked. | |
659 | * This is intentional since this way we can use id's which are not assigned. | |
660 | */ | |
a287a306 | 661 | bool chown(const std::string& path, const I2n::User& user, const I2n::Group& group) |
6a93d84a | 662 | { |
a287a306 | 663 | uid_t uid= user.Uid; |
6a93d84a | 664 | if (uid<0) return false; |
a287a306 TJ |
665 | gid_t gid= group.Gid; |
666 | if (gid<0) gid= user.Gid; | |
6a93d84a TJ |
667 | if (gid<0) return false; |
668 | int res= ::chown( path.c_str(), uid, gid); | |
669 | return (res==0); | |
670 | } // eo chown(const std::string&,const User&,const Group&) | |
e93545dd | 671 | |
0a654ec0 TJ |
672 | /** |
673 | * Recursive delete of files and directories | |
674 | * @param path File or directory to delete | |
675 | * @param error Will contain the error if the return value is false | |
676 | * @return true on success, false otherwise | |
677 | */ | |
678 | bool recursive_delete(const std::string &path, std::string *error) | |
679 | { | |
680 | bool rtn = true; | |
681 | ||
682 | try { | |
683 | struct stat my_stat; | |
684 | if (stat(path.c_str(), &my_stat) != 0) { | |
685 | throw runtime_error("can't stat " + path); | |
686 | } | |
687 | ||
688 | if (S_ISDIR(my_stat.st_mode)) { | |
689 | DIR *dir = opendir(path.c_str()); | |
690 | if (!dir) { | |
691 | throw runtime_error("can't open directory " + path); | |
692 | } | |
693 | ||
694 | struct dirent *entry; | |
695 | while ((entry = readdir(dir))) { | |
696 | string filename = entry->d_name; | |
697 | if (filename == "." || filename == "..") { | |
698 | continue; | |
699 | } | |
700 | ||
701 | // Delete subdir or file. | |
702 | rtn = recursive_delete(path + "/" + filename, error); | |
703 | if (rtn == false) { | |
704 | break; | |
705 | } | |
706 | } | |
707 | ||
708 | closedir(dir); | |
709 | if (rmdir(path.c_str()) != 0) { | |
710 | throw runtime_error("can't remove directory " + path); | |
711 | } | |
712 | } else { | |
713 | if (unlink(path.c_str()) != 0) { | |
714 | throw runtime_error("can't unlink " + path); | |
715 | } | |
716 | } | |
717 | } catch (exception &e) { | |
718 | if (error) { | |
719 | ostringstream out; | |
720 | out << e.what() << " (" << strerror(errno) << ")"; | |
721 | *error = out.str(); | |
722 | } | |
723 | rtn = false; | |
724 | } catch (...) { | |
725 | if (error) { | |
726 | ostringstream out; | |
727 | out << "unknown error (" << strerror(errno) << ")"; | |
728 | *error = out.str(); | |
729 | } | |
730 | rtn = false; | |
731 | } | |
e93545dd | 732 | |
0a654ec0 | 733 | return rtn; |
6ab3bc95 | 734 | } // eo recursive_delete(const std::string&,std::string*) |
6a93d84a | 735 | |
6ab3bc95 | 736 | } // eo namespace I2n |