FileSpec.cpp revision 4b23ab33d221eaadf40f65a5b5fe3ca4475ff761
1//===-- FileSpec.cpp --------------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10 11#include <dirent.h> 12#include <fcntl.h> 13#include <libgen.h> 14#include <sys/stat.h> 15#include <string.h> 16#include <fstream> 17 18#include "lldb/Host/Config.h" // Have to include this before we test the define... 19#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 20#include <pwd.h> 21#endif 22 23#include "llvm/ADT/StringRef.h" 24#include "llvm/Support/Path.h" 25#include "llvm/Support/Program.h" 26 27#include "lldb/Host/File.h" 28#include "lldb/Host/FileSpec.h" 29#include "lldb/Core/DataBufferHeap.h" 30#include "lldb/Core/DataBufferMemoryMap.h" 31#include "lldb/Core/Stream.h" 32#include "lldb/Host/Host.h" 33#include "lldb/Utility/CleanUp.h" 34 35using namespace lldb; 36using namespace lldb_private; 37using namespace std; 38 39static bool 40GetFileStats (const FileSpec *file_spec, struct stat *stats_ptr) 41{ 42 char resolved_path[PATH_MAX]; 43 if (file_spec->GetPath (resolved_path, sizeof(resolved_path))) 44 return ::stat (resolved_path, stats_ptr) == 0; 45 return false; 46} 47 48#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 49 50static const char* 51GetCachedGlobTildeSlash() 52{ 53 static std::string g_tilde; 54 if (g_tilde.empty()) 55 { 56 struct passwd *user_entry; 57 user_entry = getpwuid(geteuid()); 58 if (user_entry != NULL) 59 g_tilde = user_entry->pw_dir; 60 61 if (g_tilde.empty()) 62 return NULL; 63 } 64 return g_tilde.c_str(); 65} 66 67#endif // #ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 68 69// Resolves the username part of a path of the form ~user/other/directories, and 70// writes the result into dst_path. 71// Returns 0 if there WAS a ~ in the path but the username couldn't be resolved. 72// Otherwise returns the number of characters copied into dst_path. If the return 73// is >= dst_len, then the resolved path is too long... 74size_t 75FileSpec::ResolveUsername (const char *src_path, char *dst_path, size_t dst_len) 76{ 77 if (src_path == NULL || src_path[0] == '\0') 78 return 0; 79 80#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 81 82 char user_home[PATH_MAX]; 83 const char *user_name; 84 85 86 // If there's no ~, then just copy src_path straight to dst_path (they may be the same string...) 87 if (src_path[0] != '~') 88 { 89 size_t len = strlen (src_path); 90 if (len >= dst_len) 91 { 92 ::bcopy (src_path, dst_path, dst_len - 1); 93 dst_path[dst_len] = '\0'; 94 } 95 else 96 ::bcopy (src_path, dst_path, len + 1); 97 98 return len; 99 } 100 101 const char *first_slash = ::strchr (src_path, '/'); 102 char remainder[PATH_MAX]; 103 104 if (first_slash == NULL) 105 { 106 // The whole name is the username (minus the ~): 107 user_name = src_path + 1; 108 remainder[0] = '\0'; 109 } 110 else 111 { 112 int user_name_len = first_slash - src_path - 1; 113 ::memcpy (user_home, src_path + 1, user_name_len); 114 user_home[user_name_len] = '\0'; 115 user_name = user_home; 116 117 ::strcpy (remainder, first_slash); 118 } 119 120 if (user_name == NULL) 121 return 0; 122 // User name of "" means the current user... 123 124 struct passwd *user_entry; 125 const char *home_dir = NULL; 126 127 if (user_name[0] == '\0') 128 { 129 home_dir = GetCachedGlobTildeSlash(); 130 } 131 else 132 { 133 user_entry = ::getpwnam (user_name); 134 if (user_entry != NULL) 135 home_dir = user_entry->pw_dir; 136 } 137 138 if (home_dir == NULL) 139 return 0; 140 else 141 return ::snprintf (dst_path, dst_len, "%s%s", home_dir, remainder); 142#else 143 // Resolving home directories is not supported, just copy the path... 144 return ::snprintf (dst_path, dst_len, "%s", src_path); 145#endif // #ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 146} 147 148size_t 149FileSpec::ResolvePartialUsername (const char *partial_name, StringList &matches) 150{ 151#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 152 size_t extant_entries = matches.GetSize(); 153 154 setpwent(); 155 struct passwd *user_entry; 156 const char *name_start = partial_name + 1; 157 std::set<std::string> name_list; 158 159 while ((user_entry = getpwent()) != NULL) 160 { 161 if (strstr(user_entry->pw_name, name_start) == user_entry->pw_name) 162 { 163 std::string tmp_buf("~"); 164 tmp_buf.append(user_entry->pw_name); 165 tmp_buf.push_back('/'); 166 name_list.insert(tmp_buf); 167 } 168 } 169 std::set<std::string>::iterator pos, end = name_list.end(); 170 for (pos = name_list.begin(); pos != end; pos++) 171 { 172 matches.AppendString((*pos).c_str()); 173 } 174 return matches.GetSize() - extant_entries; 175#else 176 // Resolving home directories is not supported, just copy the path... 177 return 0; 178#endif // #ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 179} 180 181 182 183size_t 184FileSpec::Resolve (const char *src_path, char *dst_path, size_t dst_len) 185{ 186 if (src_path == NULL || src_path[0] == '\0') 187 return 0; 188 189 // Glob if needed for ~/, otherwise copy in case src_path is same as dst_path... 190 char unglobbed_path[PATH_MAX]; 191#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 192 if (src_path[0] == '~') 193 { 194 size_t return_count = ResolveUsername(src_path, unglobbed_path, sizeof(unglobbed_path)); 195 196 // If we couldn't find the user referred to, or the resultant path was too long, 197 // then just copy over the src_path. 198 if (return_count == 0 || return_count >= sizeof(unglobbed_path)) 199 ::snprintf (unglobbed_path, sizeof(unglobbed_path), "%s", src_path); 200 } 201 else 202#endif // #ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER 203 { 204 ::snprintf(unglobbed_path, sizeof(unglobbed_path), "%s", src_path); 205 } 206 207 // Now resolve the path if needed 208 char resolved_path[PATH_MAX]; 209 if (::realpath (unglobbed_path, resolved_path)) 210 { 211 // Success, copy the resolved path 212 return ::snprintf(dst_path, dst_len, "%s", resolved_path); 213 } 214 else 215 { 216 // Failed, just copy the unglobbed path 217 return ::snprintf(dst_path, dst_len, "%s", unglobbed_path); 218 } 219} 220 221FileSpec::FileSpec() : 222 m_directory(), 223 m_filename() 224{ 225} 226 227//------------------------------------------------------------------ 228// Default constructor that can take an optional full path to a 229// file on disk. 230//------------------------------------------------------------------ 231FileSpec::FileSpec(const char *pathname, bool resolve_path) : 232 m_directory(), 233 m_filename(), 234 m_is_resolved(false) 235{ 236 if (pathname && pathname[0]) 237 SetFile(pathname, resolve_path); 238} 239 240//------------------------------------------------------------------ 241// Copy constructor 242//------------------------------------------------------------------ 243FileSpec::FileSpec(const FileSpec& rhs) : 244 m_directory (rhs.m_directory), 245 m_filename (rhs.m_filename), 246 m_is_resolved (rhs.m_is_resolved) 247{ 248} 249 250//------------------------------------------------------------------ 251// Copy constructor 252//------------------------------------------------------------------ 253FileSpec::FileSpec(const FileSpec* rhs) : 254 m_directory(), 255 m_filename() 256{ 257 if (rhs) 258 *this = *rhs; 259} 260 261//------------------------------------------------------------------ 262// Virtual destrcuctor in case anyone inherits from this class. 263//------------------------------------------------------------------ 264FileSpec::~FileSpec() 265{ 266} 267 268//------------------------------------------------------------------ 269// Assignment operator. 270//------------------------------------------------------------------ 271const FileSpec& 272FileSpec::operator= (const FileSpec& rhs) 273{ 274 if (this != &rhs) 275 { 276 m_directory = rhs.m_directory; 277 m_filename = rhs.m_filename; 278 m_is_resolved = rhs.m_is_resolved; 279 } 280 return *this; 281} 282 283//------------------------------------------------------------------ 284// Update the contents of this object with a new path. The path will 285// be split up into a directory and filename and stored as uniqued 286// string values for quick comparison and efficient memory usage. 287//------------------------------------------------------------------ 288void 289FileSpec::SetFile (const char *pathname, bool resolve) 290{ 291 m_filename.Clear(); 292 m_directory.Clear(); 293 m_is_resolved = false; 294 if (pathname == NULL || pathname[0] == '\0') 295 return; 296 297 char resolved_path[PATH_MAX]; 298 bool path_fit = true; 299 300 if (resolve) 301 { 302 path_fit = (FileSpec::Resolve (pathname, resolved_path, sizeof(resolved_path)) < sizeof(resolved_path) - 1); 303 m_is_resolved = path_fit; 304 } 305 else 306 { 307 // Copy the path because "basename" and "dirname" want to muck with the 308 // path buffer 309 if (::strlen (pathname) > sizeof(resolved_path) - 1) 310 path_fit = false; 311 else 312 ::strcpy (resolved_path, pathname); 313 } 314 315 316 if (path_fit) 317 { 318 char *filename = ::basename (resolved_path); 319 if (filename) 320 { 321 m_filename.SetCString (filename); 322 // Truncate the basename off the end of the resolved path 323 324 // Only attempt to get the dirname if it looks like we have a path 325 if (strchr(resolved_path, '/')) 326 { 327 char *directory = ::dirname (resolved_path); 328 329 // Make sure we didn't get our directory resolved to "." without having 330 // specified 331 if (directory) 332 m_directory.SetCString(directory); 333 else 334 { 335 char *last_resolved_path_slash = strrchr(resolved_path, '/'); 336 if (last_resolved_path_slash) 337 { 338 *last_resolved_path_slash = '\0'; 339 m_directory.SetCString(resolved_path); 340 } 341 } 342 } 343 } 344 else 345 m_directory.SetCString(resolved_path); 346 } 347} 348 349//---------------------------------------------------------------------- 350// Convert to pointer operator. This allows code to check any FileSpec 351// objects to see if they contain anything valid using code such as: 352// 353// if (file_spec) 354// {} 355//---------------------------------------------------------------------- 356FileSpec::operator bool() const 357{ 358 return m_filename || m_directory; 359} 360 361//---------------------------------------------------------------------- 362// Logical NOT operator. This allows code to check any FileSpec 363// objects to see if they are invalid using code such as: 364// 365// if (!file_spec) 366// {} 367//---------------------------------------------------------------------- 368bool 369FileSpec::operator!() const 370{ 371 return !m_directory && !m_filename; 372} 373 374//------------------------------------------------------------------ 375// Equal to operator 376//------------------------------------------------------------------ 377bool 378FileSpec::operator== (const FileSpec& rhs) const 379{ 380 if (m_filename == rhs.m_filename) 381 { 382 if (m_directory == rhs.m_directory) 383 return true; 384 385 // TODO: determine if we want to keep this code in here. 386 // The code below was added to handle a case where we were 387 // trying to set a file and line breakpoint and one path 388 // was resolved, and the other not and the directory was 389 // in a mount point that resolved to a more complete path: 390 // "/tmp/a.c" == "/private/tmp/a.c". I might end up pulling 391 // this out... 392 if (IsResolved() && rhs.IsResolved()) 393 { 394 // Both paths are resolved, no need to look further... 395 return false; 396 } 397 398 FileSpec resolved_lhs(*this); 399 400 // If "this" isn't resolved, resolve it 401 if (!IsResolved()) 402 { 403 if (resolved_lhs.ResolvePath()) 404 { 405 // This path wasn't resolved but now it is. Check if the resolved 406 // directory is the same as our unresolved directory, and if so, 407 // we can mark this object as resolved to avoid more future resolves 408 m_is_resolved = (m_directory == resolved_lhs.m_directory); 409 } 410 else 411 return false; 412 } 413 414 FileSpec resolved_rhs(rhs); 415 if (!rhs.IsResolved()) 416 { 417 if (resolved_rhs.ResolvePath()) 418 { 419 // rhs's path wasn't resolved but now it is. Check if the resolved 420 // directory is the same as rhs's unresolved directory, and if so, 421 // we can mark this object as resolved to avoid more future resolves 422 rhs.m_is_resolved = (m_directory == resolved_rhs.m_directory); 423 } 424 else 425 return false; 426 } 427 428 // If we reach this point in the code we were able to resolve both paths 429 // and since we only resolve the paths if the basenames are equal, then 430 // we can just check if both directories are equal... 431 return resolved_lhs.GetDirectory() == resolved_rhs.GetDirectory(); 432 } 433 return false; 434} 435 436//------------------------------------------------------------------ 437// Not equal to operator 438//------------------------------------------------------------------ 439bool 440FileSpec::operator!= (const FileSpec& rhs) const 441{ 442 return !(*this == rhs); 443} 444 445//------------------------------------------------------------------ 446// Less than operator 447//------------------------------------------------------------------ 448bool 449FileSpec::operator< (const FileSpec& rhs) const 450{ 451 return FileSpec::Compare(*this, rhs, true) < 0; 452} 453 454//------------------------------------------------------------------ 455// Dump a FileSpec object to a stream 456//------------------------------------------------------------------ 457Stream& 458lldb_private::operator << (Stream &s, const FileSpec& f) 459{ 460 f.Dump(&s); 461 return s; 462} 463 464//------------------------------------------------------------------ 465// Clear this object by releasing both the directory and filename 466// string values and making them both the empty string. 467//------------------------------------------------------------------ 468void 469FileSpec::Clear() 470{ 471 m_directory.Clear(); 472 m_filename.Clear(); 473} 474 475//------------------------------------------------------------------ 476// Compare two FileSpec objects. If "full" is true, then both 477// the directory and the filename must match. If "full" is false, 478// then the directory names for "a" and "b" are only compared if 479// they are both non-empty. This allows a FileSpec object to only 480// contain a filename and it can match FileSpec objects that have 481// matching filenames with different paths. 482// 483// Return -1 if the "a" is less than "b", 0 if "a" is equal to "b" 484// and "1" if "a" is greater than "b". 485//------------------------------------------------------------------ 486int 487FileSpec::Compare(const FileSpec& a, const FileSpec& b, bool full) 488{ 489 int result = 0; 490 491 // If full is true, then we must compare both the directory and filename. 492 493 // If full is false, then if either directory is empty, then we match on 494 // the basename only, and if both directories have valid values, we still 495 // do a full compare. This allows for matching when we just have a filename 496 // in one of the FileSpec objects. 497 498 if (full || (a.m_directory && b.m_directory)) 499 { 500 result = ConstString::Compare(a.m_directory, b.m_directory); 501 if (result) 502 return result; 503 } 504 return ConstString::Compare (a.m_filename, b.m_filename); 505} 506 507bool 508FileSpec::Equal (const FileSpec& a, const FileSpec& b, bool full) 509{ 510 if (!full && (a.GetDirectory().IsEmpty() || b.GetDirectory().IsEmpty())) 511 return a.m_filename == b.m_filename; 512 else 513 return a == b; 514} 515 516 517 518//------------------------------------------------------------------ 519// Dump the object to the supplied stream. If the object contains 520// a valid directory name, it will be displayed followed by a 521// directory delimiter, and the filename. 522//------------------------------------------------------------------ 523void 524FileSpec::Dump(Stream *s) const 525{ 526 if (m_filename) 527 m_directory.Dump(s, ""); // Provide a default for m_directory when we dump it in case it is invalid 528 529 if (m_directory) 530 { 531 // If dirname was valid, then we need to print a slash between 532 // the directory and the filename 533 s->PutChar('/'); 534 } 535 m_filename.Dump(s); 536} 537 538//------------------------------------------------------------------ 539// Returns true if the file exists. 540//------------------------------------------------------------------ 541bool 542FileSpec::Exists () const 543{ 544 struct stat file_stats; 545 return GetFileStats (this, &file_stats); 546} 547 548bool 549FileSpec::ResolveExecutableLocation () 550{ 551 if (!m_directory) 552 { 553 const char *file_cstr = m_filename.GetCString(); 554 if (file_cstr) 555 { 556 const std::string file_str (file_cstr); 557 llvm::sys::Path path = llvm::sys::Program::FindProgramByName (file_str); 558 const std::string &path_str = path.str(); 559 llvm::StringRef dir_ref = llvm::sys::path::parent_path(path_str); 560 //llvm::StringRef dir_ref = path.getDirname(); 561 if (! dir_ref.empty()) 562 { 563 // FindProgramByName returns "." if it can't find the file. 564 if (strcmp (".", dir_ref.data()) == 0) 565 return false; 566 567 m_directory.SetCString (dir_ref.data()); 568 if (Exists()) 569 return true; 570 else 571 { 572 // If FindProgramByName found the file, it returns the directory + filename in its return results. 573 // We need to separate them. 574 FileSpec tmp_file (dir_ref.data(), false); 575 if (tmp_file.Exists()) 576 { 577 m_directory = tmp_file.m_directory; 578 return true; 579 } 580 } 581 } 582 } 583 } 584 585 return false; 586} 587 588bool 589FileSpec::ResolvePath () 590{ 591 if (m_is_resolved) 592 return true; // We have already resolved this path 593 594 char path_buf[PATH_MAX]; 595 if (!GetPath (path_buf, PATH_MAX)) 596 return false; 597 // SetFile(...) will set m_is_resolved correctly if it can resolve the path 598 SetFile (path_buf, true); 599 return m_is_resolved; 600} 601 602uint64_t 603FileSpec::GetByteSize() const 604{ 605 struct stat file_stats; 606 if (GetFileStats (this, &file_stats)) 607 return file_stats.st_size; 608 return 0; 609} 610 611FileSpec::FileType 612FileSpec::GetFileType () const 613{ 614 struct stat file_stats; 615 if (GetFileStats (this, &file_stats)) 616 { 617 mode_t file_type = file_stats.st_mode & S_IFMT; 618 switch (file_type) 619 { 620 case S_IFDIR: return eFileTypeDirectory; 621 case S_IFIFO: return eFileTypePipe; 622 case S_IFREG: return eFileTypeRegular; 623 case S_IFSOCK: return eFileTypeSocket; 624 case S_IFLNK: return eFileTypeSymbolicLink; 625 default: 626 break; 627 } 628 return eFileTypeUnknown; 629 } 630 return eFileTypeInvalid; 631} 632 633TimeValue 634FileSpec::GetModificationTime () const 635{ 636 TimeValue mod_time; 637 struct stat file_stats; 638 if (GetFileStats (this, &file_stats)) 639 mod_time.OffsetWithSeconds(file_stats.st_mtime); 640 return mod_time; 641} 642 643//------------------------------------------------------------------ 644// Directory string get accessor. 645//------------------------------------------------------------------ 646ConstString & 647FileSpec::GetDirectory() 648{ 649 return m_directory; 650} 651 652//------------------------------------------------------------------ 653// Directory string const get accessor. 654//------------------------------------------------------------------ 655const ConstString & 656FileSpec::GetDirectory() const 657{ 658 return m_directory; 659} 660 661//------------------------------------------------------------------ 662// Filename string get accessor. 663//------------------------------------------------------------------ 664ConstString & 665FileSpec::GetFilename() 666{ 667 return m_filename; 668} 669 670//------------------------------------------------------------------ 671// Filename string const get accessor. 672//------------------------------------------------------------------ 673const ConstString & 674FileSpec::GetFilename() const 675{ 676 return m_filename; 677} 678 679//------------------------------------------------------------------ 680// Extract the directory and path into a fixed buffer. This is 681// needed as the directory and path are stored in separate string 682// values. 683//------------------------------------------------------------------ 684size_t 685FileSpec::GetPath(char *path, size_t path_max_len) const 686{ 687 if (path_max_len) 688 { 689 const char *dirname = m_directory.GetCString(); 690 const char *filename = m_filename.GetCString(); 691 if (dirname) 692 { 693 if (filename) 694 return ::snprintf (path, path_max_len, "%s/%s", dirname, filename); 695 else 696 return ::snprintf (path, path_max_len, "%s", dirname); 697 } 698 else if (filename) 699 { 700 return ::snprintf (path, path_max_len, "%s", filename); 701 } 702 } 703 if (path) 704 path[0] = '\0'; 705 return 0; 706} 707 708ConstString 709FileSpec::GetFileNameExtension () const 710{ 711 const char *filename = m_filename.GetCString(); 712 if (filename == NULL) 713 return ConstString(); 714 715 const char* dot_pos = strrchr(filename, '.'); 716 if (dot_pos == NULL) 717 return ConstString(); 718 719 return ConstString(dot_pos+1); 720} 721 722ConstString 723FileSpec::GetFileNameStrippingExtension () const 724{ 725 const char *filename = m_filename.GetCString(); 726 if (filename == NULL) 727 return ConstString(); 728 729 const char* dot_pos = strrchr(filename, '.'); 730 if (dot_pos == NULL) 731 return m_filename; 732 733 return ConstString(filename, dot_pos-filename); 734} 735 736//------------------------------------------------------------------ 737// Returns a shared pointer to a data buffer that contains all or 738// part of the contents of a file. The data is memory mapped and 739// will lazily page in data from the file as memory is accessed. 740// The data that is mappped will start "file_offset" bytes into the 741// file, and "file_size" bytes will be mapped. If "file_size" is 742// greater than the number of bytes available in the file starting 743// at "file_offset", the number of bytes will be appropriately 744// truncated. The final number of bytes that get mapped can be 745// verified using the DataBuffer::GetByteSize() function. 746//------------------------------------------------------------------ 747DataBufferSP 748FileSpec::MemoryMapFileContents(off_t file_offset, size_t file_size) const 749{ 750 DataBufferSP data_sp; 751 auto_ptr<DataBufferMemoryMap> mmap_data(new DataBufferMemoryMap()); 752 if (mmap_data.get()) 753 { 754 if (mmap_data->MemoryMapFromFileSpec (this, file_offset, file_size) >= file_size) 755 data_sp.reset(mmap_data.release()); 756 } 757 return data_sp; 758} 759 760 761//------------------------------------------------------------------ 762// Return the size in bytes that this object takes in memory. This 763// returns the size in bytes of this object, not any shared string 764// values it may refer to. 765//------------------------------------------------------------------ 766size_t 767FileSpec::MemorySize() const 768{ 769 return m_filename.MemorySize() + m_directory.MemorySize(); 770} 771 772 773size_t 774FileSpec::ReadFileContents (off_t file_offset, void *dst, size_t dst_len, Error *error_ptr) const 775{ 776 Error error; 777 size_t bytes_read = 0; 778 char resolved_path[PATH_MAX]; 779 if (GetPath(resolved_path, sizeof(resolved_path))) 780 { 781 File file; 782 error = file.Open(resolved_path, File::eOpenOptionRead); 783 if (error.Success()) 784 { 785 off_t file_offset_after_seek = file_offset; 786 bytes_read = dst_len; 787 error = file.Read(dst, bytes_read, file_offset_after_seek); 788 } 789 } 790 else 791 { 792 error.SetErrorString("invalid file specification"); 793 } 794 if (error_ptr) 795 *error_ptr = error; 796 return bytes_read; 797} 798 799//------------------------------------------------------------------ 800// Returns a shared pointer to a data buffer that contains all or 801// part of the contents of a file. The data copies into a heap based 802// buffer that lives in the DataBuffer shared pointer object returned. 803// The data that is cached will start "file_offset" bytes into the 804// file, and "file_size" bytes will be mapped. If "file_size" is 805// greater than the number of bytes available in the file starting 806// at "file_offset", the number of bytes will be appropriately 807// truncated. The final number of bytes that get mapped can be 808// verified using the DataBuffer::GetByteSize() function. 809//------------------------------------------------------------------ 810DataBufferSP 811FileSpec::ReadFileContents (off_t file_offset, size_t file_size, Error *error_ptr) const 812{ 813 Error error; 814 DataBufferSP data_sp; 815 char resolved_path[PATH_MAX]; 816 if (GetPath(resolved_path, sizeof(resolved_path))) 817 { 818 File file; 819 error = file.Open(resolved_path, File::eOpenOptionRead); 820 if (error.Success()) 821 error = file.Read (file_size, file_offset, data_sp); 822 } 823 else 824 { 825 error.SetErrorString("invalid file specification"); 826 } 827 if (error_ptr) 828 *error_ptr = error; 829 return data_sp; 830} 831 832size_t 833FileSpec::ReadFileLines (STLStringArray &lines) 834{ 835 lines.clear(); 836 char path[PATH_MAX]; 837 if (GetPath(path, sizeof(path))) 838 { 839 ifstream file_stream (path); 840 841 if (file_stream) 842 { 843 std::string line; 844 while (getline (file_stream, line)) 845 lines.push_back (line); 846 } 847 } 848 return lines.size(); 849} 850 851FileSpec::EnumerateDirectoryResult 852FileSpec::EnumerateDirectory 853( 854 const char *dir_path, 855 bool find_directories, 856 bool find_files, 857 bool find_other, 858 EnumerateDirectoryCallbackType callback, 859 void *callback_baton 860) 861{ 862 if (dir_path && dir_path[0]) 863 { 864 lldb_utility::CleanUp <DIR *, int> dir_path_dir (opendir(dir_path), NULL, closedir); 865 if (dir_path_dir.is_valid()) 866 { 867 struct dirent* dp; 868 while ((dp = readdir(dir_path_dir.get())) != NULL) 869 { 870 // Only search directories 871 if (dp->d_type == DT_DIR || dp->d_type == DT_UNKNOWN) 872 { 873 size_t len = strlen(dp->d_name); 874 875 if (len == 1 && dp->d_name[0] == '.') 876 continue; 877 878 if (len == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.') 879 continue; 880 } 881 882 bool call_callback = false; 883 FileSpec::FileType file_type = eFileTypeUnknown; 884 885 switch (dp->d_type) 886 { 887 default: 888 case DT_UNKNOWN: file_type = eFileTypeUnknown; call_callback = true; break; 889 case DT_FIFO: file_type = eFileTypePipe; call_callback = find_other; break; 890 case DT_CHR: file_type = eFileTypeOther; call_callback = find_other; break; 891 case DT_DIR: file_type = eFileTypeDirectory; call_callback = find_directories; break; 892 case DT_BLK: file_type = eFileTypeOther; call_callback = find_other; break; 893 case DT_REG: file_type = eFileTypeRegular; call_callback = find_files; break; 894 case DT_LNK: file_type = eFileTypeSymbolicLink; call_callback = find_other; break; 895 case DT_SOCK: file_type = eFileTypeSocket; call_callback = find_other; break; 896#if !defined(__OpenBSD__) 897 case DT_WHT: file_type = eFileTypeOther; call_callback = find_other; break; 898#endif 899 } 900 901 if (call_callback) 902 { 903 char child_path[PATH_MAX]; 904 const int child_path_len = ::snprintf (child_path, sizeof(child_path), "%s/%s", dir_path, dp->d_name); 905 if (child_path_len < (int)(sizeof(child_path) - 1)) 906 { 907 // Don't resolve the file type or path 908 FileSpec child_path_spec (child_path, false); 909 910 EnumerateDirectoryResult result = callback (callback_baton, file_type, child_path_spec); 911 912 switch (result) 913 { 914 default: 915 case eEnumerateDirectoryResultNext: 916 // Enumerate next entry in the current directory. We just 917 // exit this switch and will continue enumerating the 918 // current directory as we currently are... 919 break; 920 921 case eEnumerateDirectoryResultEnter: // Recurse into the current entry if it is a directory or symlink, or next if not 922 if (FileSpec::EnumerateDirectory (child_path, 923 find_directories, 924 find_files, 925 find_other, 926 callback, 927 callback_baton) == eEnumerateDirectoryResultQuit) 928 { 929 // The subdirectory returned Quit, which means to 930 // stop all directory enumerations at all levels. 931 return eEnumerateDirectoryResultQuit; 932 } 933 break; 934 935 case eEnumerateDirectoryResultExit: // Exit from the current directory at the current level. 936 // Exit from this directory level and tell parent to 937 // keep enumerating. 938 return eEnumerateDirectoryResultNext; 939 940 case eEnumerateDirectoryResultQuit: // Stop directory enumerations at any level 941 return eEnumerateDirectoryResultQuit; 942 } 943 } 944 } 945 } 946 } 947 } 948 // By default when exiting a directory, we tell the parent enumeration 949 // to continue enumerating. 950 return eEnumerateDirectoryResultNext; 951} 952 953