1 //===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Builds up (relatively) standard unix archive files (.a) containing LLVM
11 // bytecode or other files.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Module.h"
16 #include "llvm/Bytecode/Archive.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/Compressor.h"
19 #include "llvm/System/Signals.h"
27 // Option for compatibility with ASIX, not used but must allow it to be present.
29 X32Option ("X32_64", cl::Hidden,
30 cl::desc("Ignored option for compatibility with AIX"));
32 // llvm-ar operation code and modifier flags. This must come first.
33 static cl::opt<std::string>
34 Options(cl::Positional, cl::Required, cl::desc("{operation}[modifiers]..."));
36 // llvm-ar remaining positional arguments.
37 static cl::list<std::string>
38 RestOfArgs(cl::Positional, cl::OneOrMore,
39 cl::desc("[relpos] [count] <archive-file> [members]..."));
41 // MoreHelp - Provide additional help output explaining the operations and
42 // modifiers of llvm-ar. This object instructs the CommandLine library
43 // to print the text of the constructor when the --help option is given.
44 static cl::extrahelp MoreHelp(
46 " d[NsS] - delete file(s) from the archive\n"
47 " m[abiSs] - move file(s) in the archive\n"
48 " p[kN] - print file(s) found in the archive\n"
49 " q[ufsS] - quick append file(s) to the archive\n"
50 " r[abfiuzRsS] - replace or insert file(s) into the archive\n"
51 " t - display contents of archive\n"
52 " x[No] - extract file(s) from the archive\n"
53 "\nMODIFIERS (operation specific):\n"
54 " [a] - put file(s) after [relpos]\n"
55 " [b] - put file(s) before [relpos] (same as [i])\n"
56 " [f] - truncate inserted file names\n"
57 " [i] - put file(s) before [relpos] (same as [b])\n"
58 " [k] - always print bytecode files (default is to skip them)\n"
59 " [N] - use instance [count] of name\n"
60 " [o] - preserve original dates\n"
61 " [P] - use full path names when matching\n"
62 " [R] - recurse through directories when inserting\n"
63 " [s] - create an archive index (cf. ranlib)\n"
64 " [S] - do not build a symbol table\n"
65 " [u] - update only files newer than archive contents\n"
66 " [z] - compress files before inserting/extracting\n"
67 "\nMODIFIERS (generic):\n"
68 " [c] - do not warn if the library had to be created\n"
69 " [v] - be verbose about actions taken\n"
70 " [V] - be *really* verbose about actions taken\n"
73 // This enumeration delineates the kinds of operations on an archive
74 // that are permitted.
75 enum ArchiveOperation {
76 NoOperation, ///< An operation hasn't been specified
77 Print, ///< Print the contents of the archive
78 Delete, ///< Delete the specified members
79 Move, ///< Move members to end or as given by {a,b,i} modifiers
80 QuickAppend, ///< Quickly append to end of archive
81 ReplaceOrInsert, ///< Replace or Insert members
82 DisplayTable, ///< Display the table of contents
83 Extract ///< Extract files back to file system
86 // Modifiers to follow operation to vary behavior
87 bool AddAfter = false; ///< 'a' modifier
88 bool AddBefore = false; ///< 'b' modifier
89 bool Create = false; ///< 'c' modifier
90 bool TruncateNames = false; ///< 'f' modifier
91 bool InsertBefore = false; ///< 'i' modifier
92 bool DontSkipBytecode = false; ///< 'k' modifier
93 bool UseCount = false; ///< 'N' modifier
94 bool OriginalDates = false; ///< 'o' modifier
95 bool FullPath = false; ///< 'P' modifier
96 bool RecurseDirectories = false; ///< 'R' modifier
97 bool SymTable = true; ///< 's' & 'S' modifiers
98 bool OnlyUpdate = false; ///< 'u' modifier
99 bool Verbose = false; ///< 'v' modifier
100 bool ReallyVerbose = false; ///< 'V' modifier
101 bool Compression = false; ///< 'z' modifier
103 // Relative Positional Argument (for insert/move). This variable holds
104 // the name of the archive member to which the 'a', 'b' or 'i' modifier
105 // refers. Only one of 'a', 'b' or 'i' can be specified so we only need
109 // Select which of multiple entries in the archive with the same name should be
110 // used (specified with -N) for the delete and extract operations.
113 // This variable holds the name of the archive file as given on the
115 std::string ArchiveName;
117 // This variable holds the list of member files to proecess, as given
118 // on the command line.
119 std::vector<std::string> Members;
121 // This variable holds the (possibly expanded) list of path objects that
122 // correspond to files we will
123 std::set<sys::Path> Paths;
125 // The Archive object to which all the editing operations will be sent.
126 Archive* TheArchive = 0;
128 // getRelPos - Extract the member filename from the command line for
129 // the [relpos] argument associated with a, b, and i modifiers
131 if(RestOfArgs.size() > 0) {
132 RelPos = RestOfArgs[0];
133 RestOfArgs.erase(RestOfArgs.begin());
136 throw "Expected [relpos] for a, b, or i modifier";
139 // getCount - Extract the [count] argument associated with the N modifier
140 // from the command line and check its value.
142 if(RestOfArgs.size() > 0) {
143 Count = atoi(RestOfArgs[0].c_str());
144 RestOfArgs.erase(RestOfArgs.begin());
147 throw "Expected [count] value with N modifier";
149 // Non-positive counts are not allowed
151 throw "Invalid [count] value (not a positive integer)";
154 // getArchive - Get the archive file name from the command line
156 if(RestOfArgs.size() > 0) {
157 ArchiveName = RestOfArgs[0];
158 RestOfArgs.erase(RestOfArgs.begin());
161 throw "An archive name must be specified.";
164 // getMembers - Copy over remaining items in RestOfArgs to our Members vector
165 // This is just for clarity.
167 if(RestOfArgs.size() > 0)
168 Members = std::vector<std::string>(RestOfArgs);
171 // parseCommandLine - Parse the command line options as presented and return the
172 // operation specified. Process all modifiers and check to make sure that
173 // constraints on modifier/operation pairs have not been violated.
174 ArchiveOperation parseCommandLine() {
176 // Keep track of number of operations. We can only specify one
178 unsigned NumOperations = 0;
180 // Keep track of the number of positional modifiers (a,b,i). Only
181 // one can be specified.
182 unsigned NumPositional = 0;
184 // Keep track of which operation was requested
185 ArchiveOperation Operation = NoOperation;
187 for(unsigned i=0; i<Options.size(); ++i) {
189 case 'd': ++NumOperations; Operation = Delete; break;
190 case 'm': ++NumOperations; Operation = Move ; break;
191 case 'p': ++NumOperations; Operation = Print; break;
192 case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
193 case 't': ++NumOperations; Operation = DisplayTable; break;
194 case 'x': ++NumOperations; Operation = Extract; break;
195 case 'c': Create = true; break;
196 case 'f': TruncateNames = true; break;
197 case 'k': DontSkipBytecode = true; break;
198 case 'l': /* accepted but unused */ break;
199 case 'o': OriginalDates = true; break;
200 case 'P': FullPath = true; break;
201 case 'R': RecurseDirectories = true; break;
202 case 's': SymTable = true; break;
203 case 'S': SymTable = false; break;
204 case 'u': OnlyUpdate = true; break;
205 case 'v': Verbose = true; break;
206 case 'V': Verbose = ReallyVerbose = true; break;
207 case 'z': Compression = true; break;
228 cl::PrintHelpMessage();
232 // At this point, the next thing on the command line must be
236 // Everything on the command line at this point is a member.
239 // Perform various checks on the operation/modifier specification
240 // to make sure we are dealing with a legal request.
241 if (NumOperations == 0)
242 throw "You must specify at least one of the operations";
243 if (NumOperations > 1)
244 throw "Only one operation may be specified";
245 if (NumPositional > 1)
246 throw "You may only specify one of a, b, and i modifiers";
247 if (AddAfter || AddBefore || InsertBefore)
248 if (Operation != Move && Operation != ReplaceOrInsert)
249 throw "The 'a', 'b' and 'i' modifiers can only be specified with "
250 "the 'm' or 'r' operations";
251 if (RecurseDirectories && Operation != ReplaceOrInsert)
252 throw "The 'R' modifiers is only applicabe to the 'r' operation";
253 if (OriginalDates && Operation != Extract)
254 throw "The 'o' modifier is only applicable to the 'x' operation";
255 if (TruncateNames && Operation!=QuickAppend && Operation!=ReplaceOrInsert)
256 throw "The 'f' modifier is only applicable to the 'q' and 'r' operations";
257 if (OnlyUpdate && Operation != ReplaceOrInsert)
258 throw "The 'u' modifier is only applicable to the 'r' operation";
259 if (Compression && Operation!=ReplaceOrInsert && Operation!=Extract)
260 throw "The 'z' modifier is only applicable to the 'r' and 'x' operations";
261 if (Count > 1 && Members.size() > 1)
262 throw "Only one member name may be specified with the 'N' modifier";
264 // Return the parsed operation to the caller
268 // recurseDirectories - Implements the "R" modifier. This function scans through
269 // the Paths vector (built by buildPaths, below) and replaces any directories it
270 // finds with all the files in that directory (recursively). It uses the
271 // sys::Path::getDirectoryContent method to perform the actual directory scans.
272 std::set<sys::Path> recurseDirectories(const sys::Path& path) {
273 assert(path.isDirectory() && "Oops, can't recurse a file");
274 std::set<sys::Path> result;
275 if (RecurseDirectories) {
276 std::set<sys::Path> content;
277 path.getDirectoryContents(content);
278 for (std::set<sys::Path>::iterator I = content.begin(), E = content.end();
280 if (I->isDirectory()) {
281 std::set<sys::Path> moreResults = recurseDirectories(*I);
282 result.insert(moreResults.begin(), moreResults.end());
291 // buildPaths - Convert the strings in the Members vector to sys::Path objects
292 // and make sure they are valid and exist exist. This check is only needed for
293 // the operations that add/replace files to the archive ('q' and 'r')
294 void buildPaths(bool checkExistence = true) {
295 for (unsigned i = 0; i < Members.size(); i++) {
297 if (!aPath.set(Members[i]))
298 throw std::string("File member name invalid: ") + Members[i];
299 if (checkExistence) {
301 throw std::string("File does not exist: ") + Members[i];
302 sys::Path::StatusInfo si;
303 aPath.getStatusInfo(si);
305 std::set<sys::Path> dirpaths = recurseDirectories(aPath);
306 Paths.insert(dirpaths.begin(),dirpaths.end());
316 // printSymbolTable - print out the archive's symbol table.
317 void printSymbolTable() {
318 std::cout << "\nArchive Symbol Table:\n";
319 const Archive::SymTabType& symtab = TheArchive->getSymbolTable();
320 for (Archive::SymTabType::const_iterator I=symtab.begin(), E=symtab.end();
322 unsigned offset = TheArchive->getFirstFileOffset() + I->second;
323 std::cout << " " << std::setw(9) << offset << "\t" << I->first <<"\n";
327 // doPrint - Implements the 'p' operation. This function traverses the archive
328 // looking for members that match the path list. It is careful to uncompress
329 // things that should be and to skip bytecode files unless the 'k' modifier was
333 unsigned countDown = Count;
334 for (Archive::iterator I = TheArchive->begin(), E = TheArchive->end();
337 (std::find(Paths.begin(), Paths.end(), I->getPath()) != Paths.end())) {
338 if (countDown == 1) {
339 const char* data = reinterpret_cast<const char*>(I->getData());
341 // Skip things that don't make sense to print
342 if (I->isLLVMSymbolTable() || I->isSVR4SymbolTable() ||
343 I->isBSD4SymbolTable() || (!DontSkipBytecode &&
344 (I->isBytecode() || I->isCompressedBytecode())))
348 std::cout << "Printing " << I->getPath().toString() << "\n";
350 if (I->isCompressedBytecode())
351 Compressor::decompressToStream(data+4,I->getSize()-4,std::cout);
352 else if (I->isCompressed()) {
353 Compressor::decompressToStream(data,I->getSize(),std::cout);
355 unsigned len = I->getSize();
356 std::cout.write(data, len);
365 // putMode - utility function for printing out the file mode when the 't'
366 // operation is in verbose mode.
367 void printMode(unsigned mode) {
382 // doDisplayTable - Implement the 't' operation. This function prints out just
383 // the file names of each of the members. However, if verbose mode is requested
384 // ('v' modifier) then the file type, permission mode, user, group, size, and
385 // modification time are also printed.
386 void doDisplayTable() {
388 for (Archive::iterator I = TheArchive->begin(), E = TheArchive->end();
391 (std::find(Paths.begin(), Paths.end(), I->getPath()) != Paths.end())) {
393 // FIXME: Output should be this format:
394 // Zrw-r--r-- 500/ 500 525 Nov 8 17:42 2004 Makefile
397 else if (I->isCompressedBytecode())
399 else if (I->isCompressed())
403 unsigned mode = I->getMode();
404 printMode((mode >> 6) & 007);
405 printMode((mode >> 3) & 007);
406 printMode(mode & 007);
407 std::cout << " " << std::setw(4) << I->getUser();
408 std::cout << "/" << std::setw(4) << I->getGroup();
409 std::cout << " " << std::setw(8) << I->getSize();
410 std::cout << " " << std::setw(20) <<
411 I->getModTime().toString().substr(4);
412 std::cout << " " << I->getPath().toString() << "\n";
414 std::cout << I->getPath().toString() << "\n";
422 // doExtract - Implement the 'x' operation. This function extracts files back to
423 // the file system, making sure to uncompress any that were compressed.
426 unsigned countDown = Count;
427 for (Archive::iterator I = TheArchive->begin(), E = TheArchive->end();
430 (std::find(Paths.begin(), Paths.end(), I->getPath()) != Paths.end())) {
432 // Make sure the intervening directories are created
434 sys::Path dirs(I->getPath());
435 dirs.eraseComponent();
436 dirs.createDirectoryOnDisk(/*create_parents=*/true);
439 // Open up a file stream for writing
440 std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
442 std::ofstream file(I->getPath().c_str(), io_mode);
444 // Get the data and its length
445 const char* data = reinterpret_cast<const char*>(I->getData());
446 unsigned len = I->getSize();
448 // Write the data, making sure to uncompress things first
449 if (I->isCompressed()) {
450 Compressor::decompressToStream(data,len,file);
452 file.write(data,len);
456 // If we're supposed to retain the original modification times, etc. do so
459 I->getPath().setStatusInfoOnDisk(I->getStatusInfo());
464 // doDelete - Implement the delete operation. This function deletes zero or more
465 // members from the archive. Note that if the count is specified, there should
466 // be no more than one path in the Paths list or else this algorithm breaks.
467 // That check is enforced in parseCommandLine (above).
470 if (Paths.empty()) return;
471 unsigned countDown = Count;
472 for (Archive::iterator I = TheArchive->begin(), E = TheArchive->end();
474 if (std::find(Paths.begin(), Paths.end(), I->getPath()) != Paths.end()) {
475 if (countDown == 1) {
476 Archive::iterator J = I;
478 TheArchive->erase(J);
486 // We're done editting, reconstruct the archive.
487 TheArchive->writeToDisk(SymTable,TruncateNames,Compression);
492 // doMore - Implement the move operation. This function re-arranges just the
493 // order of the archive members so that when the archive is written the move
494 // of the members is accomplished. Note the use of the RelPos variable to
495 // determine where the items should be moved to.
500 // By default and convention the place to move members to is the end of the
502 Archive::iterator moveto_spot = TheArchive->end();
504 // However, if the relative positioning modifiers were used, we need to scan
505 // the archive to find the member in question. If we don't find it, its no
506 // crime, we just move to the end.
507 if (AddBefore || InsertBefore || AddAfter) {
508 for (Archive::iterator I = TheArchive->begin(), E= TheArchive->end();
510 if (RelPos == I->getPath().toString()) {
522 // Keep a list of the paths remaining to be moved
523 std::set<sys::Path> remaining(Paths);
525 // Scan the archive again, this time looking for the members to move to the
527 for (Archive::iterator I = TheArchive->begin(), E= TheArchive->end();
528 I != E && !remaining.empty(); ++I ) {
529 std::set<sys::Path>::iterator found =
530 std::find(remaining.begin(),remaining.end(),I->getPath());
531 if (found != remaining.end()) {
532 if (I != moveto_spot)
533 TheArchive->splice(moveto_spot,*TheArchive,I);
534 remaining.erase(found);
538 // We're done editting, reconstruct the archive.
539 TheArchive->writeToDisk(SymTable,TruncateNames,Compression);
544 // doQuickAppend - Implements the 'q' operation. This function just
545 // indiscriminantly adds the members to the archive and rebuilds it.
546 void doQuickAppend() {
547 // Get the list of paths to append.
549 if (Paths.empty()) return;
551 // Append them quickly.
552 for (std::set<sys::Path>::iterator PI = Paths.begin(), PE = Paths.end();
554 TheArchive->addFileBefore(*PI,TheArchive->end());
557 // We're done editting, reconstruct the archive.
558 TheArchive->writeToDisk(SymTable,TruncateNames,Compression);
563 // doReplaceOrInsert - Implements the 'r' operation. This function will replace
564 // any existing files or insert new ones into the archive.
565 void doReplaceOrInsert() {
567 // Build the list of files to be added/replaced.
569 if (Paths.empty()) return;
571 // Keep track of the paths that remain to be inserted.
572 std::set<sys::Path> remaining(Paths);
574 // Default the insertion spot to the end of the archive
575 Archive::iterator insert_spot = TheArchive->end();
577 // Iterate over the archive contents
578 for (Archive::iterator I = TheArchive->begin(), E = TheArchive->end();
579 I != E && !remaining.empty(); ++I ) {
581 // Determine if this archive member matches one of the paths we're trying
584 std::set<sys::Path>::iterator found = remaining.end();
585 for (std::set<sys::Path>::iterator RI = remaining.begin(),
586 RE = remaining.end(); RI != RE; ++RI ) {
587 std::string compare(RI->toString());
588 if (TruncateNames && compare.length() > 15) {
589 const char* nm = compare.c_str();
590 unsigned len = compare.length();
591 size_t slashpos = compare.rfind('/');
592 if (slashpos != std::string::npos) {
598 compare.assign(nm,len);
600 if (compare == I->getPath().toString()) {
606 if (found != remaining.end()) {
607 sys::Path::StatusInfo si;
608 found->getStatusInfo(si);
611 // Replace the item only if it is newer.
612 if (si.modTime > I->getModTime())
613 I->replaceWith(*found);
615 // Replace the item regardless of time stamp
616 I->replaceWith(*found);
619 // We purposefully ignore directories.
622 // Remove it from our "to do" list
623 remaining.erase(found);
626 // Determine if this is the place where we should insert
627 if ((AddBefore || InsertBefore) && (RelPos == I->getPath().toString()))
629 else if (AddAfter && (RelPos == I->getPath().toString())) {
635 // If we didn't replace all the members, some will remain and need to be
636 // inserted at the previously computed insert-spot.
637 if (!remaining.empty()) {
638 for (std::set<sys::Path>::iterator PI = remaining.begin(),
639 PE = remaining.end(); PI != PE; ++PI) {
640 TheArchive->addFileBefore(*PI,insert_spot);
644 // We're done editting, reconstruct the archive.
645 TheArchive->writeToDisk(SymTable,TruncateNames,Compression);
650 // main - main program for llvm-ar .. see comments in the code
651 int main(int argc, char **argv) {
653 // Have the command line options parsed and handle things
654 // like --help and --version.
655 cl::ParseCommandLineOptions(argc, argv,
656 " LLVM Archiver (llvm-ar)\n\n"
657 " This program archives bytecode files into single libraries\n"
660 // Print a stack trace if we signal out.
661 sys::PrintStackTraceOnErrorSignal();
665 // Make sure we don't exit with "unhandled exception".
667 // Do our own parsing of the command line because the CommandLine utility
668 // can't handle the grouped positional parameters without a dash.
669 ArchiveOperation Operation = parseCommandLine();
671 // Check the path name of the archive
672 sys::Path ArchivePath;
673 if (!ArchivePath.set(ArchiveName))
674 throw std::string("Archive name invalid: ") + ArchiveName;
676 // Create or open the archive object.
677 if (!ArchivePath.exists()) {
678 // Produce a warning if we should and we're creating the archive
680 std::cerr << argv[0] << ": creating " << ArchivePath.toString() << "\n";
681 TheArchive = Archive::CreateEmpty(ArchivePath);
684 TheArchive = Archive::OpenAndLoad(ArchivePath, &Error);
685 if (TheArchive == 0) {
686 std::cerr << argv[0] << ": error loading '" << ArchivePath << "': "
692 // Make sure we're not fooling ourselves.
693 assert(TheArchive && "Unable to instantiate the archive");
695 // Make sure we clean up the archive even on failure.
696 std::auto_ptr<Archive> AutoArchive(TheArchive);
698 // Perform the operation
700 case Print: doPrint(); break;
701 case Delete: doDelete(); break;
702 case Move: doMove(); break;
703 case QuickAppend: /* FALL THROUGH */
704 case ReplaceOrInsert: doReplaceOrInsert(); break;
705 case DisplayTable: doDisplayTable(); break;
706 case Extract: doExtract(); break;
708 std::cerr << argv[0] << ": No operation was selected.\n";
711 } catch (const char*msg) {
712 // These errors are usage errors, thrown only by the various checks in the
714 std::cerr << argv[0] << ": " << msg << "\n\n";
715 cl::PrintHelpMessage();
717 } catch (const std::string& msg) {
718 // These errors are thrown by LLVM libraries (e.g. lib System) and represent
719 // a more serious error so we bump the exitCode and don't print the usage.
720 std::cerr << argv[0] << ": " << msg << "\n";
723 // This really shouldn't happen, but just in case ....
724 std::cerr << argv[0] << ": An unexpected unknown exception occurred.\n";
728 // Return result code back to operating system.