Commit | Line | Data |
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578bfd0a AL |
1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
7da2b375 | 3 | // $Id: fileutl.cc,v 1.42 2002/09/14 05:29:22 jgg Exp $ |
578bfd0a AL |
4 | /* ###################################################################### |
5 | ||
6 | File Utilities | |
7 | ||
8 | CopyFile - Buffered copy of a single file | |
9 | GetLock - dpkg compatible lock file manipulation (fcntl) | |
10 | ||
614adaa0 MV |
11 | Most of this source is placed in the Public Domain, do with it what |
12 | you will | |
7da2b375 | 13 | It was originally written by Jason Gunthorpe <jgg@debian.org>. |
578bfd0a | 14 | |
614adaa0 MV |
15 | The exception is RunScripts() it is under the GPLv2 |
16 | ||
578bfd0a AL |
17 | ##################################################################### */ |
18 | /*}}}*/ | |
19 | // Include Files /*{{{*/ | |
094a497d AL |
20 | #include <apt-pkg/fileutl.h> |
21 | #include <apt-pkg/error.h> | |
b2e465d6 | 22 | #include <apt-pkg/sptr.h> |
75ef8f14 | 23 | #include <apt-pkg/configuration.h> |
b2e465d6 AL |
24 | |
25 | #include <apti18n.h> | |
578bfd0a | 26 | |
152ab79e | 27 | #include <cstdlib> |
4f333a8b MV |
28 | #include <cstring> |
29 | ||
4d055c05 | 30 | #include <iostream> |
578bfd0a | 31 | #include <unistd.h> |
2c206aa4 | 32 | #include <fcntl.h> |
578bfd0a | 33 | #include <sys/stat.h> |
578bfd0a | 34 | #include <sys/types.h> |
cc2313b7 | 35 | #include <sys/time.h> |
1ae93c94 | 36 | #include <sys/wait.h> |
46e39c8e | 37 | #include <dirent.h> |
54676e1a | 38 | #include <signal.h> |
65a1e968 | 39 | #include <errno.h> |
75ef8f14 | 40 | #include <set> |
46e39c8e | 41 | #include <algorithm> |
578bfd0a AL |
42 | /*}}}*/ |
43 | ||
4d055c05 AL |
44 | using namespace std; |
45 | ||
614adaa0 MV |
46 | // RunScripts - Run a set of scripts from a configuration subtree /*{{{*/ |
47 | // --------------------------------------------------------------------- | |
48 | /* */ | |
49 | bool RunScripts(const char *Cnf) | |
50 | { | |
51 | Configuration::Item const *Opts = _config->Tree(Cnf); | |
52 | if (Opts == 0 || Opts->Child == 0) | |
53 | return true; | |
54 | Opts = Opts->Child; | |
55 | ||
56 | // Fork for running the system calls | |
57 | pid_t Child = ExecFork(); | |
58 | ||
59 | // This is the child | |
60 | if (Child == 0) | |
61 | { | |
62 | if (chdir("/tmp/") != 0) | |
63 | _exit(100); | |
64 | ||
65 | unsigned int Count = 1; | |
66 | for (; Opts != 0; Opts = Opts->Next, Count++) | |
67 | { | |
68 | if (Opts->Value.empty() == true) | |
69 | continue; | |
70 | ||
71 | if (system(Opts->Value.c_str()) != 0) | |
72 | _exit(100+Count); | |
73 | } | |
74 | _exit(0); | |
75 | } | |
76 | ||
77 | // Wait for the child | |
78 | int Status = 0; | |
79 | while (waitpid(Child,&Status,0) != Child) | |
80 | { | |
81 | if (errno == EINTR) | |
82 | continue; | |
83 | return _error->Errno("waitpid","Couldn't wait for subprocess"); | |
84 | } | |
85 | ||
86 | // Restore sig int/quit | |
87 | signal(SIGQUIT,SIG_DFL); | |
88 | signal(SIGINT,SIG_DFL); | |
89 | ||
90 | // Check for an error code. | |
91 | if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) | |
92 | { | |
93 | unsigned int Count = WEXITSTATUS(Status); | |
94 | if (Count > 100) | |
95 | { | |
96 | Count -= 100; | |
97 | for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--); | |
98 | _error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str()); | |
99 | } | |
100 | ||
101 | return _error->Error("Sub-process returned an error code"); | |
102 | } | |
103 | ||
104 | return true; | |
105 | } | |
106 | /*}}}*/ | |
107 | ||
578bfd0a AL |
108 | // CopyFile - Buffered copy of a file /*{{{*/ |
109 | // --------------------------------------------------------------------- | |
110 | /* The caller is expected to set things so that failure causes erasure */ | |
8b89e57f | 111 | bool CopyFile(FileFd &From,FileFd &To) |
578bfd0a AL |
112 | { |
113 | if (From.IsOpen() == false || To.IsOpen() == false) | |
114 | return false; | |
115 | ||
116 | // Buffered copy between fds | |
b2e465d6 | 117 | SPtrArray<unsigned char> Buf = new unsigned char[64000]; |
b0db36b1 AL |
118 | unsigned long Size = From.Size(); |
119 | while (Size != 0) | |
578bfd0a | 120 | { |
b0db36b1 AL |
121 | unsigned long ToRead = Size; |
122 | if (Size > 64000) | |
123 | ToRead = 64000; | |
124 | ||
4a6d5862 | 125 | if (From.Read(Buf,ToRead) == false || |
b0db36b1 | 126 | To.Write(Buf,ToRead) == false) |
578bfd0a | 127 | return false; |
b0db36b1 AL |
128 | |
129 | Size -= ToRead; | |
578bfd0a AL |
130 | } |
131 | ||
578bfd0a AL |
132 | return true; |
133 | } | |
134 | /*}}}*/ | |
135 | // GetLock - Gets a lock file /*{{{*/ | |
136 | // --------------------------------------------------------------------- | |
137 | /* This will create an empty file of the given name and lock it. Once this | |
138 | is done all other calls to GetLock in any other process will fail with | |
139 | -1. The return result is the fd of the file, the call should call | |
140 | close at some time. */ | |
141 | int GetLock(string File,bool Errors) | |
142 | { | |
f659b39a OS |
143 | // GetLock() is used in aptitude on directories with public-write access |
144 | // Use O_NOFOLLOW here to prevent symlink traversal attacks | |
145 | int FD = open(File.c_str(),O_RDWR | O_CREAT | O_NOFOLLOW,0640); | |
578bfd0a AL |
146 | if (FD < 0) |
147 | { | |
b2e465d6 AL |
148 | // Read only .. cant have locking problems there. |
149 | if (errno == EROFS) | |
150 | { | |
151 | _error->Warning(_("Not using locking for read only lock file %s"),File.c_str()); | |
152 | return dup(0); // Need something for the caller to close | |
153 | } | |
154 | ||
578bfd0a | 155 | if (Errors == true) |
b2e465d6 AL |
156 | _error->Errno("open",_("Could not open lock file %s"),File.c_str()); |
157 | ||
158 | // Feh.. We do this to distinguish the lock vs open case.. | |
159 | errno = EPERM; | |
578bfd0a AL |
160 | return -1; |
161 | } | |
b2e465d6 AL |
162 | SetCloseExec(FD,true); |
163 | ||
578bfd0a AL |
164 | // Aquire a write lock |
165 | struct flock fl; | |
c71bc556 AL |
166 | fl.l_type = F_WRLCK; |
167 | fl.l_whence = SEEK_SET; | |
168 | fl.l_start = 0; | |
169 | fl.l_len = 0; | |
578bfd0a AL |
170 | if (fcntl(FD,F_SETLK,&fl) == -1) |
171 | { | |
d89df07a AL |
172 | if (errno == ENOLCK) |
173 | { | |
b2e465d6 AL |
174 | _error->Warning(_("Not using locking for nfs mounted lock file %s"),File.c_str()); |
175 | return dup(0); // Need something for the caller to close | |
d89df07a | 176 | } |
578bfd0a | 177 | if (Errors == true) |
b2e465d6 AL |
178 | _error->Errno("open",_("Could not get lock %s"),File.c_str()); |
179 | ||
180 | int Tmp = errno; | |
578bfd0a | 181 | close(FD); |
b2e465d6 | 182 | errno = Tmp; |
578bfd0a AL |
183 | return -1; |
184 | } | |
185 | ||
186 | return FD; | |
187 | } | |
188 | /*}}}*/ | |
189 | // FileExists - Check if a file exists /*{{{*/ | |
190 | // --------------------------------------------------------------------- | |
191 | /* */ | |
192 | bool FileExists(string File) | |
193 | { | |
194 | struct stat Buf; | |
195 | if (stat(File.c_str(),&Buf) != 0) | |
196 | return false; | |
197 | return true; | |
198 | } | |
199 | /*}}}*/ | |
46e39c8e MV |
200 | // GetListOfFilesInDir - returns a vector of files in the given dir /*{{{*/ |
201 | // --------------------------------------------------------------------- | |
202 | /* If an extension is given only files with this extension are included | |
203 | in the returned vector, otherwise every "normal" file is included. */ | |
b39c1859 MV |
204 | std::vector<string> GetListOfFilesInDir(string const &Dir, string const &Ext, |
205 | bool const &SortList, bool const &AllowNoExt) | |
206 | { | |
207 | std::vector<string> ext; | |
208 | ext.reserve(2); | |
209 | if (Ext.empty() == false) | |
210 | ext.push_back(Ext); | |
211 | if (AllowNoExt == true && ext.empty() == false) | |
212 | ext.push_back(""); | |
213 | return GetListOfFilesInDir(Dir, ext, SortList); | |
214 | } | |
215 | std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> const &Ext, | |
216 | bool const &SortList) | |
217 | { | |
218 | // Attention debuggers: need to be set with the environment config file! | |
219 | bool const Debug = _config->FindB("Debug::GetListOfFilesInDir", false); | |
220 | if (Debug == true) | |
221 | { | |
222 | std::clog << "Accept in " << Dir << " only files with the following " << Ext.size() << " extensions:" << std::endl; | |
223 | if (Ext.empty() == true) | |
224 | std::clog << "\tNO extension" << std::endl; | |
225 | else | |
226 | for (std::vector<string>::const_iterator e = Ext.begin(); | |
227 | e != Ext.end(); ++e) | |
228 | std::clog << '\t' << (e->empty() == true ? "NO" : *e) << " extension" << std::endl; | |
229 | } | |
230 | ||
46e39c8e MV |
231 | std::vector<string> List; |
232 | DIR *D = opendir(Dir.c_str()); | |
233 | if (D == 0) | |
234 | { | |
235 | _error->Errno("opendir",_("Unable to read %s"),Dir.c_str()); | |
236 | return List; | |
237 | } | |
238 | ||
239 | for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) | |
240 | { | |
b39c1859 | 241 | // skip "hidden" files |
46e39c8e MV |
242 | if (Ent->d_name[0] == '.') |
243 | continue; | |
244 | ||
b39c1859 MV |
245 | // check for accepted extension: |
246 | // no extension given -> periods are bad as hell! | |
247 | // extensions given -> "" extension allows no extension | |
248 | if (Ext.empty() == false) | |
249 | { | |
250 | string d_ext = flExtension(Ent->d_name); | |
251 | if (d_ext == Ent->d_name) // no extension | |
252 | { | |
253 | if (std::find(Ext.begin(), Ext.end(), "") == Ext.end()) | |
254 | { | |
255 | if (Debug == true) | |
256 | std::clog << "Bad file: " << Ent->d_name << " → no extension" << std::endl; | |
257 | continue; | |
258 | } | |
259 | } | |
260 | else if (std::find(Ext.begin(), Ext.end(), d_ext) == Ext.end()) | |
261 | { | |
262 | if (Debug == true) | |
263 | std::clog << "Bad file: " << Ent->d_name << " → bad extension »" << flExtension(Ent->d_name) << "«" << std::endl; | |
264 | continue; | |
265 | } | |
266 | } | |
46e39c8e | 267 | |
b39c1859 | 268 | // Skip bad filenames ala run-parts |
46e39c8e MV |
269 | const char *C = Ent->d_name; |
270 | for (; *C != 0; ++C) | |
271 | if (isalpha(*C) == 0 && isdigit(*C) == 0 | |
b39c1859 MV |
272 | && *C != '_' && *C != '-') { |
273 | // no required extension -> dot is a bad character | |
274 | if (*C == '.' && Ext.empty() == false) | |
275 | continue; | |
46e39c8e | 276 | break; |
b39c1859 | 277 | } |
46e39c8e | 278 | |
b39c1859 | 279 | // we don't reach the end of the name -> bad character included |
46e39c8e | 280 | if (*C != 0) |
b39c1859 MV |
281 | { |
282 | if (Debug == true) | |
283 | std::clog << "Bad file: " << Ent->d_name << " → bad character »" | |
284 | << *C << "« in filename (period allowed: " << (Ext.empty() ? "no" : "yes") << ")" << std::endl; | |
285 | continue; | |
286 | } | |
287 | ||
288 | // skip filenames which end with a period. These are never valid | |
289 | if (*(C - 1) == '.') | |
290 | { | |
291 | if (Debug == true) | |
292 | std::clog << "Bad file: " << Ent->d_name << " → Period as last character" << std::endl; | |
46e39c8e | 293 | continue; |
b39c1859 | 294 | } |
46e39c8e MV |
295 | |
296 | // Make sure it is a file and not something else | |
297 | string const File = flCombine(Dir,Ent->d_name); | |
298 | struct stat St; | |
299 | if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0) | |
b39c1859 MV |
300 | { |
301 | if (Debug == true) | |
302 | std::clog << "Bad file: " << Ent->d_name << " → stat says not a good file" << std::endl; | |
46e39c8e | 303 | continue; |
b39c1859 | 304 | } |
46e39c8e | 305 | |
b39c1859 MV |
306 | if (Debug == true) |
307 | std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl; | |
46e39c8e MV |
308 | List.push_back(File); |
309 | } | |
310 | closedir(D); | |
311 | ||
312 | if (SortList == true) | |
313 | std::sort(List.begin(),List.end()); | |
314 | return List; | |
315 | } | |
316 | /*}}}*/ | |
578bfd0a AL |
317 | // SafeGetCWD - This is a safer getcwd that returns a dynamic string /*{{{*/ |
318 | // --------------------------------------------------------------------- | |
319 | /* We return / on failure. */ | |
320 | string SafeGetCWD() | |
321 | { | |
322 | // Stash the current dir. | |
323 | char S[300]; | |
324 | S[0] = 0; | |
7f25bdff | 325 | if (getcwd(S,sizeof(S)-2) == 0) |
578bfd0a | 326 | return "/"; |
7f25bdff AL |
327 | unsigned int Len = strlen(S); |
328 | S[Len] = '/'; | |
329 | S[Len+1] = 0; | |
578bfd0a AL |
330 | return S; |
331 | } | |
332 | /*}}}*/ | |
8ce4327b AL |
333 | // flNotDir - Strip the directory from the filename /*{{{*/ |
334 | // --------------------------------------------------------------------- | |
335 | /* */ | |
336 | string flNotDir(string File) | |
337 | { | |
338 | string::size_type Res = File.rfind('/'); | |
339 | if (Res == string::npos) | |
340 | return File; | |
341 | Res++; | |
342 | return string(File,Res,Res - File.length()); | |
343 | } | |
344 | /*}}}*/ | |
d38b7b3d AL |
345 | // flNotFile - Strip the file from the directory name /*{{{*/ |
346 | // --------------------------------------------------------------------- | |
171c45bc | 347 | /* Result ends in a / */ |
d38b7b3d AL |
348 | string flNotFile(string File) |
349 | { | |
350 | string::size_type Res = File.rfind('/'); | |
351 | if (Res == string::npos) | |
171c45bc | 352 | return "./"; |
d38b7b3d AL |
353 | Res++; |
354 | return string(File,0,Res); | |
355 | } | |
356 | /*}}}*/ | |
b2e465d6 AL |
357 | // flExtension - Return the extension for the file /*{{{*/ |
358 | // --------------------------------------------------------------------- | |
359 | /* */ | |
360 | string flExtension(string File) | |
361 | { | |
362 | string::size_type Res = File.rfind('.'); | |
363 | if (Res == string::npos) | |
364 | return File; | |
365 | Res++; | |
366 | return string(File,Res,Res - File.length()); | |
367 | } | |
368 | /*}}}*/ | |
421c8d10 AL |
369 | // flNoLink - If file is a symlink then deref it /*{{{*/ |
370 | // --------------------------------------------------------------------- | |
371 | /* If the name is not a link then the returned path is the input. */ | |
372 | string flNoLink(string File) | |
373 | { | |
374 | struct stat St; | |
375 | if (lstat(File.c_str(),&St) != 0 || S_ISLNK(St.st_mode) == 0) | |
376 | return File; | |
377 | if (stat(File.c_str(),&St) != 0) | |
378 | return File; | |
379 | ||
380 | /* Loop resolving the link. There is no need to limit the number of | |
381 | loops because the stat call above ensures that the symlink is not | |
382 | circular */ | |
383 | char Buffer[1024]; | |
384 | string NFile = File; | |
385 | while (1) | |
386 | { | |
387 | // Read the link | |
388 | int Res; | |
389 | if ((Res = readlink(NFile.c_str(),Buffer,sizeof(Buffer))) <= 0 || | |
390 | (unsigned)Res >= sizeof(Buffer)) | |
391 | return File; | |
392 | ||
393 | // Append or replace the previous path | |
394 | Buffer[Res] = 0; | |
395 | if (Buffer[0] == '/') | |
396 | NFile = Buffer; | |
397 | else | |
398 | NFile = flNotFile(NFile) + Buffer; | |
399 | ||
400 | // See if we are done | |
401 | if (lstat(NFile.c_str(),&St) != 0) | |
402 | return File; | |
403 | if (S_ISLNK(St.st_mode) == 0) | |
404 | return NFile; | |
405 | } | |
406 | } | |
407 | /*}}}*/ | |
b2e465d6 AL |
408 | // flCombine - Combine a file and a directory /*{{{*/ |
409 | // --------------------------------------------------------------------- | |
410 | /* If the file is an absolute path then it is just returned, otherwise | |
411 | the directory is pre-pended to it. */ | |
412 | string flCombine(string Dir,string File) | |
413 | { | |
414 | if (File.empty() == true) | |
415 | return string(); | |
416 | ||
417 | if (File[0] == '/' || Dir.empty() == true) | |
418 | return File; | |
419 | if (File.length() >= 2 && File[0] == '.' && File[1] == '/') | |
420 | return File; | |
421 | if (Dir[Dir.length()-1] == '/') | |
422 | return Dir + File; | |
423 | return Dir + '/' + File; | |
424 | } | |
425 | /*}}}*/ | |
3b5421b4 AL |
426 | // SetCloseExec - Set the close on exec flag /*{{{*/ |
427 | // --------------------------------------------------------------------- | |
428 | /* */ | |
429 | void SetCloseExec(int Fd,bool Close) | |
430 | { | |
431 | if (fcntl(Fd,F_SETFD,(Close == false)?0:FD_CLOEXEC) != 0) | |
432 | { | |
433 | cerr << "FATAL -> Could not set close on exec " << strerror(errno) << endl; | |
434 | exit(100); | |
435 | } | |
436 | } | |
437 | /*}}}*/ | |
438 | // SetNonBlock - Set the nonblocking flag /*{{{*/ | |
439 | // --------------------------------------------------------------------- | |
440 | /* */ | |
441 | void SetNonBlock(int Fd,bool Block) | |
442 | { | |
0a8a80e5 AL |
443 | int Flags = fcntl(Fd,F_GETFL) & (~O_NONBLOCK); |
444 | if (fcntl(Fd,F_SETFL,Flags | ((Block == false)?0:O_NONBLOCK)) != 0) | |
3b5421b4 AL |
445 | { |
446 | cerr << "FATAL -> Could not set non-blocking flag " << strerror(errno) << endl; | |
447 | exit(100); | |
448 | } | |
449 | } | |
450 | /*}}}*/ | |
451 | // WaitFd - Wait for a FD to become readable /*{{{*/ | |
452 | // --------------------------------------------------------------------- | |
b2e465d6 | 453 | /* This waits for a FD to become readable using select. It is useful for |
6d5dd02a AL |
454 | applications making use of non-blocking sockets. The timeout is |
455 | in seconds. */ | |
1084d58a | 456 | bool WaitFd(int Fd,bool write,unsigned long timeout) |
3b5421b4 AL |
457 | { |
458 | fd_set Set; | |
cc2313b7 | 459 | struct timeval tv; |
3b5421b4 AL |
460 | FD_ZERO(&Set); |
461 | FD_SET(Fd,&Set); | |
6d5dd02a AL |
462 | tv.tv_sec = timeout; |
463 | tv.tv_usec = 0; | |
1084d58a | 464 | if (write == true) |
b0db36b1 AL |
465 | { |
466 | int Res; | |
467 | do | |
468 | { | |
469 | Res = select(Fd+1,0,&Set,0,(timeout != 0?&tv:0)); | |
470 | } | |
471 | while (Res < 0 && errno == EINTR); | |
472 | ||
473 | if (Res <= 0) | |
474 | return false; | |
1084d58a AL |
475 | } |
476 | else | |
477 | { | |
b0db36b1 AL |
478 | int Res; |
479 | do | |
480 | { | |
481 | Res = select(Fd+1,&Set,0,0,(timeout != 0?&tv:0)); | |
482 | } | |
483 | while (Res < 0 && errno == EINTR); | |
484 | ||
485 | if (Res <= 0) | |
486 | return false; | |
cc2313b7 | 487 | } |
1084d58a | 488 | |
3b5421b4 AL |
489 | return true; |
490 | } | |
491 | /*}}}*/ | |
54676e1a AL |
492 | // ExecFork - Magical fork that sanitizes the context before execing /*{{{*/ |
493 | // --------------------------------------------------------------------- | |
494 | /* This is used if you want to cleanse the environment for the forked | |
495 | child, it fixes up the important signals and nukes all of the fds, | |
496 | otherwise acts like normal fork. */ | |
75ef8f14 | 497 | pid_t ExecFork() |
54676e1a AL |
498 | { |
499 | // Fork off the process | |
500 | pid_t Process = fork(); | |
501 | if (Process < 0) | |
502 | { | |
503 | cerr << "FATAL -> Failed to fork." << endl; | |
504 | exit(100); | |
505 | } | |
506 | ||
507 | // Spawn the subprocess | |
508 | if (Process == 0) | |
509 | { | |
510 | // Setup the signals | |
511 | signal(SIGPIPE,SIG_DFL); | |
512 | signal(SIGQUIT,SIG_DFL); | |
513 | signal(SIGINT,SIG_DFL); | |
514 | signal(SIGWINCH,SIG_DFL); | |
515 | signal(SIGCONT,SIG_DFL); | |
516 | signal(SIGTSTP,SIG_DFL); | |
75ef8f14 MV |
517 | |
518 | set<int> KeepFDs; | |
519 | Configuration::Item const *Opts = _config->Tree("APT::Keep-Fds"); | |
520 | if (Opts != 0 && Opts->Child != 0) | |
521 | { | |
522 | Opts = Opts->Child; | |
523 | for (; Opts != 0; Opts = Opts->Next) | |
524 | { | |
525 | if (Opts->Value.empty() == true) | |
526 | continue; | |
527 | int fd = atoi(Opts->Value.c_str()); | |
528 | KeepFDs.insert(fd); | |
529 | } | |
530 | } | |
531 | ||
54676e1a AL |
532 | // Close all of our FDs - just in case |
533 | for (int K = 3; K != 40; K++) | |
75ef8f14 MV |
534 | { |
535 | if(KeepFDs.find(K) == KeepFDs.end()) | |
007dc9e0 | 536 | fcntl(K,F_SETFD,FD_CLOEXEC); |
75ef8f14 | 537 | } |
54676e1a AL |
538 | } |
539 | ||
540 | return Process; | |
541 | } | |
542 | /*}}}*/ | |
ddc1d8d0 AL |
543 | // ExecWait - Fancy waitpid /*{{{*/ |
544 | // --------------------------------------------------------------------- | |
2c9a72d1 | 545 | /* Waits for the given sub process. If Reap is set then no errors are |
ddc1d8d0 AL |
546 | generated. Otherwise a failed subprocess will generate a proper descriptive |
547 | message */ | |
3826564e | 548 | bool ExecWait(pid_t Pid,const char *Name,bool Reap) |
ddc1d8d0 AL |
549 | { |
550 | if (Pid <= 1) | |
551 | return true; | |
552 | ||
553 | // Wait and collect the error code | |
554 | int Status; | |
555 | while (waitpid(Pid,&Status,0) != Pid) | |
556 | { | |
557 | if (errno == EINTR) | |
558 | continue; | |
559 | ||
560 | if (Reap == true) | |
561 | return false; | |
562 | ||
db0db9fe | 563 | return _error->Error(_("Waited for %s but it wasn't there"),Name); |
ddc1d8d0 AL |
564 | } |
565 | ||
566 | ||
567 | // Check for an error code. | |
568 | if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) | |
569 | { | |
570 | if (Reap == true) | |
571 | return false; | |
ab7f4d7c | 572 | if (WIFSIGNALED(Status) != 0) |
40e7fe0e | 573 | { |
ab7f4d7c MV |
574 | if( WTERMSIG(Status) == SIGSEGV) |
575 | return _error->Error(_("Sub-process %s received a segmentation fault."),Name); | |
576 | else | |
577 | return _error->Error(_("Sub-process %s received signal %u."),Name, WTERMSIG(Status)); | |
40e7fe0e | 578 | } |
ddc1d8d0 AL |
579 | |
580 | if (WIFEXITED(Status) != 0) | |
b2e465d6 | 581 | return _error->Error(_("Sub-process %s returned an error code (%u)"),Name,WEXITSTATUS(Status)); |
ddc1d8d0 | 582 | |
b2e465d6 | 583 | return _error->Error(_("Sub-process %s exited unexpectedly"),Name); |
ddc1d8d0 AL |
584 | } |
585 | ||
586 | return true; | |
587 | } | |
588 | /*}}}*/ | |
578bfd0a | 589 | |
13d87e2e | 590 | // FileFd::Open - Open a file /*{{{*/ |
578bfd0a AL |
591 | // --------------------------------------------------------------------- |
592 | /* The most commonly used open mode combinations are given with Mode */ | |
13d87e2e | 593 | bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms) |
578bfd0a | 594 | { |
13d87e2e | 595 | Close(); |
1164783d | 596 | Flags = AutoClose; |
578bfd0a AL |
597 | switch (Mode) |
598 | { | |
599 | case ReadOnly: | |
600 | iFd = open(FileName.c_str(),O_RDONLY); | |
601 | break; | |
602 | ||
603 | case WriteEmpty: | |
50b513a1 AL |
604 | { |
605 | struct stat Buf; | |
459681d3 | 606 | if (lstat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode)) |
50b513a1 AL |
607 | unlink(FileName.c_str()); |
608 | iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_TRUNC,Perms); | |
609 | break; | |
610 | } | |
578bfd0a AL |
611 | |
612 | case WriteExists: | |
613 | iFd = open(FileName.c_str(),O_RDWR); | |
614 | break; | |
0a8e3465 AL |
615 | |
616 | case WriteAny: | |
617 | iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms); | |
d38b7b3d | 618 | break; |
f08fcf34 AL |
619 | |
620 | case WriteTemp: | |
4decd43c AL |
621 | unlink(FileName.c_str()); |
622 | iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms); | |
f08fcf34 | 623 | break; |
578bfd0a AL |
624 | } |
625 | ||
626 | if (iFd < 0) | |
b2e465d6 | 627 | return _error->Errno("open",_("Could not open file %s"),FileName.c_str()); |
13d87e2e AL |
628 | |
629 | this->FileName = FileName; | |
630 | SetCloseExec(iFd,true); | |
631 | return true; | |
578bfd0a AL |
632 | } |
633 | /*}}}*/ | |
8e06abb2 | 634 | // FileFd::~File - Closes the file /*{{{*/ |
578bfd0a AL |
635 | // --------------------------------------------------------------------- |
636 | /* If the proper modes are selected then we close the Fd and possibly | |
637 | unlink the file on error. */ | |
8e06abb2 | 638 | FileFd::~FileFd() |
578bfd0a AL |
639 | { |
640 | Close(); | |
641 | } | |
642 | /*}}}*/ | |
8e06abb2 | 643 | // FileFd::Read - Read a bit of the file /*{{{*/ |
578bfd0a | 644 | // --------------------------------------------------------------------- |
b0db36b1 AL |
645 | /* We are carefull to handle interruption by a signal while reading |
646 | gracefully. */ | |
f604cf55 | 647 | bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual) |
578bfd0a | 648 | { |
b0db36b1 AL |
649 | int Res; |
650 | errno = 0; | |
f604cf55 AL |
651 | if (Actual != 0) |
652 | *Actual = 0; | |
653 | ||
b0db36b1 | 654 | do |
578bfd0a | 655 | { |
b0db36b1 AL |
656 | Res = read(iFd,To,Size); |
657 | if (Res < 0 && errno == EINTR) | |
658 | continue; | |
659 | if (Res < 0) | |
660 | { | |
661 | Flags |= Fail; | |
b2e465d6 | 662 | return _error->Errno("read",_("Read error")); |
b0db36b1 | 663 | } |
578bfd0a | 664 | |
b0db36b1 AL |
665 | To = (char *)To + Res; |
666 | Size -= Res; | |
f604cf55 AL |
667 | if (Actual != 0) |
668 | *Actual += Res; | |
b0db36b1 AL |
669 | } |
670 | while (Res > 0 && Size > 0); | |
671 | ||
672 | if (Size == 0) | |
673 | return true; | |
674 | ||
ddc1d8d0 | 675 | // Eof handling |
f604cf55 | 676 | if (Actual != 0) |
ddc1d8d0 AL |
677 | { |
678 | Flags |= HitEof; | |
679 | return true; | |
680 | } | |
681 | ||
b0db36b1 | 682 | Flags |= Fail; |
b2e465d6 | 683 | return _error->Error(_("read, still have %lu to read but none left"),Size); |
578bfd0a AL |
684 | } |
685 | /*}}}*/ | |
8e06abb2 | 686 | // FileFd::Write - Write to the file /*{{{*/ |
578bfd0a AL |
687 | // --------------------------------------------------------------------- |
688 | /* */ | |
a05599f1 | 689 | bool FileFd::Write(const void *From,unsigned long Size) |
578bfd0a | 690 | { |
b0db36b1 AL |
691 | int Res; |
692 | errno = 0; | |
693 | do | |
578bfd0a | 694 | { |
b0db36b1 AL |
695 | Res = write(iFd,From,Size); |
696 | if (Res < 0 && errno == EINTR) | |
697 | continue; | |
698 | if (Res < 0) | |
699 | { | |
700 | Flags |= Fail; | |
b2e465d6 | 701 | return _error->Errno("write",_("Write error")); |
b0db36b1 AL |
702 | } |
703 | ||
704 | From = (char *)From + Res; | |
705 | Size -= Res; | |
578bfd0a | 706 | } |
b0db36b1 | 707 | while (Res > 0 && Size > 0); |
578bfd0a | 708 | |
b0db36b1 AL |
709 | if (Size == 0) |
710 | return true; | |
711 | ||
712 | Flags |= Fail; | |
b2e465d6 | 713 | return _error->Error(_("write, still have %lu to write but couldn't"),Size); |
578bfd0a AL |
714 | } |
715 | /*}}}*/ | |
8e06abb2 | 716 | // FileFd::Seek - Seek in the file /*{{{*/ |
578bfd0a AL |
717 | // --------------------------------------------------------------------- |
718 | /* */ | |
8e06abb2 | 719 | bool FileFd::Seek(unsigned long To) |
578bfd0a AL |
720 | { |
721 | if (lseek(iFd,To,SEEK_SET) != (signed)To) | |
722 | { | |
723 | Flags |= Fail; | |
b2e465d6 | 724 | return _error->Error("Unable to seek to %lu",To); |
578bfd0a AL |
725 | } |
726 | ||
727f18af AL |
727 | return true; |
728 | } | |
729 | /*}}}*/ | |
730 | // FileFd::Skip - Seek in the file /*{{{*/ | |
731 | // --------------------------------------------------------------------- | |
732 | /* */ | |
733 | bool FileFd::Skip(unsigned long Over) | |
734 | { | |
735 | if (lseek(iFd,Over,SEEK_CUR) < 0) | |
736 | { | |
737 | Flags |= Fail; | |
b2e465d6 | 738 | return _error->Error("Unable to seek ahead %lu",Over); |
727f18af AL |
739 | } |
740 | ||
6d5dd02a AL |
741 | return true; |
742 | } | |
743 | /*}}}*/ | |
744 | // FileFd::Truncate - Truncate the file /*{{{*/ | |
745 | // --------------------------------------------------------------------- | |
746 | /* */ | |
747 | bool FileFd::Truncate(unsigned long To) | |
748 | { | |
749 | if (ftruncate(iFd,To) != 0) | |
750 | { | |
751 | Flags |= Fail; | |
b2e465d6 | 752 | return _error->Error("Unable to truncate to %lu",To); |
6d5dd02a AL |
753 | } |
754 | ||
578bfd0a AL |
755 | return true; |
756 | } | |
757 | /*}}}*/ | |
7f25bdff AL |
758 | // FileFd::Tell - Current seek position /*{{{*/ |
759 | // --------------------------------------------------------------------- | |
760 | /* */ | |
761 | unsigned long FileFd::Tell() | |
762 | { | |
763 | off_t Res = lseek(iFd,0,SEEK_CUR); | |
764 | if (Res == (off_t)-1) | |
765 | _error->Errno("lseek","Failed to determine the current file position"); | |
766 | return Res; | |
767 | } | |
768 | /*}}}*/ | |
8e06abb2 | 769 | // FileFd::Size - Return the size of the file /*{{{*/ |
578bfd0a AL |
770 | // --------------------------------------------------------------------- |
771 | /* */ | |
8e06abb2 | 772 | unsigned long FileFd::Size() |
578bfd0a AL |
773 | { |
774 | struct stat Buf; | |
775 | if (fstat(iFd,&Buf) != 0) | |
776 | return _error->Errno("fstat","Unable to determine the file size"); | |
777 | return Buf.st_size; | |
778 | } | |
779 | /*}}}*/ | |
8e06abb2 | 780 | // FileFd::Close - Close the file if the close flag is set /*{{{*/ |
578bfd0a AL |
781 | // --------------------------------------------------------------------- |
782 | /* */ | |
8e06abb2 | 783 | bool FileFd::Close() |
578bfd0a AL |
784 | { |
785 | bool Res = true; | |
786 | if ((Flags & AutoClose) == AutoClose) | |
1164783d | 787 | if (iFd >= 0 && close(iFd) != 0) |
b2e465d6 | 788 | Res &= _error->Errno("close",_("Problem closing the file")); |
1164783d AL |
789 | iFd = -1; |
790 | ||
578bfd0a AL |
791 | if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail && |
792 | FileName.empty() == false) | |
793 | if (unlink(FileName.c_str()) != 0) | |
b2e465d6 | 794 | Res &= _error->WarningE("unlnk",_("Problem unlinking the file")); |
578bfd0a AL |
795 | return Res; |
796 | } | |
797 | /*}}}*/ | |
b2e465d6 AL |
798 | // FileFd::Sync - Sync the file /*{{{*/ |
799 | // --------------------------------------------------------------------- | |
800 | /* */ | |
801 | bool FileFd::Sync() | |
802 | { | |
803 | #ifdef _POSIX_SYNCHRONIZED_IO | |
804 | if (fsync(iFd) != 0) | |
805 | return _error->Errno("sync",_("Problem syncing the file")); | |
806 | #endif | |
807 | return true; | |
808 | } | |
809 | /*}}}*/ |