-//===- llvm/Support/Unix/Path.cpp - Unix Path Implementation -----*- C++ -*-===//
+//===- llvm/Support/Unix/Path.inc - Unix Path Implementation ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file implements the Unix specific portion of the Path class.
+// This file implements the Unix specific implementation of the Path API.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
#include "Unix.h"
+#include <limits.h>
+#include <stdio.h>
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_UTIME_H
-#include <utime.h>
-#endif
-#if HAVE_TIME_H
-#include <time.h>
-#endif
#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
# endif
#endif
-#if HAVE_DLFCN_H
-#include <dlfcn.h>
-#endif
-
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
+// Both stdio.h and cstdio are included via different pathes and
+// stdcxx's cstdio doesn't include stdio.h, so it doesn't #undef the macros
+// either.
+#undef ferror
+#undef feof
+
// For GNU Hurd
-#if defined(__GNU__) && !defined(MAXPATHLEN)
-# define MAXPATHLEN 4096
+#if defined(__GNU__) && !defined(PATH_MAX)
+# define PATH_MAX 4096
#endif
-// Put in a hack for Cygwin which falsely reports that the mkdtemp function
-// is available when it is not.
-#ifdef __CYGWIN__
-# undef HAVE_MKDTEMP
-#endif
+using namespace llvm;
namespace {
-inline bool lastIsSlash(const std::string& path) {
- return !path.empty() && path[path.length() - 1] == '/';
-}
-
-}
-
-namespace llvm {
-using namespace sys;
-
-const char sys::PathSeparator = ':';
-
-StringRef Path::GetEXESuffix() {
- return StringRef();
-}
-
-Path::Path(StringRef p)
- : path(p) {}
-
-Path::Path(const char *StrStart, unsigned StrLen)
- : path(StrStart, StrLen) {}
+ /// This class automatically closes the given file descriptor when it goes out
+ /// of scope. You can take back explicit ownership of the file descriptor by
+ /// calling take(). The destructor does not verify that close was successful.
+ /// Therefore, never allow this class to call close on a file descriptor that
+ /// has been read from or written to.
+ struct AutoFD {
+ int FileDescriptor;
+
+ AutoFD(int fd) : FileDescriptor(fd) {}
+ ~AutoFD() {
+ if (FileDescriptor >= 0)
+ ::close(FileDescriptor);
+ }
-Path&
-Path::operator=(StringRef that) {
- path.assign(that.data(), that.size());
- return *this;
-}
+ int take() {
+ int ret = FileDescriptor;
+ FileDescriptor = -1;
+ return ret;
+ }
-bool
-Path::isValid() const {
- // Empty paths are considered invalid here.
- // This code doesn't check MAXPATHLEN because there's no need. Nothing in
- // LLVM manipulates Paths with fixed-sizes arrays, and if the OS can't
- // handle names longer than some limit, it'll report this on demand using
- // ENAMETOLONG.
- return !path.empty();
+ operator int() const {return FileDescriptor;}
+ };
}
-bool
-Path::isAbsolute(const char *NameStart, unsigned NameLen) {
- assert(NameStart);
- if (NameLen == 0)
- return false;
- return NameStart[0] == '/';
-}
-
-bool
-Path::isAbsolute() const {
- if (path.empty())
- return false;
- return path[0] == '/';
-}
-
-Path
-Path::GetRootDirectory() {
- Path result;
- result.set("/");
- return result;
-}
-
-Path
-Path::GetTemporaryDirectory(std::string *ErrMsg) {
-#if defined(HAVE_MKDTEMP)
- // The best way is with mkdtemp but that's not available on many systems,
- // Linux and FreeBSD have it. Others probably won't.
- char pathname[] = "/tmp/llvm_XXXXXX";
- if (0 == mkdtemp(pathname)) {
- MakeErrMsg(ErrMsg,
- std::string(pathname) + ": can't create temporary directory");
- return Path();
- }
- return Path(pathname);
-#elif defined(HAVE_MKSTEMP)
- // If no mkdtemp is available, mkstemp can be used to create a temporary file
- // which is then removed and created as a directory. We prefer this over
- // mktemp because of mktemp's inherent security and threading risks. We still
- // have a slight race condition from the time the temporary file is created to
- // the time it is re-created as a directoy.
- char pathname[] = "/tmp/llvm_XXXXXX";
- int fd = 0;
- if (-1 == (fd = mkstemp(pathname))) {
- MakeErrMsg(ErrMsg,
- std::string(pathname) + ": can't create temporary directory");
- return Path();
- }
- ::close(fd);
- ::unlink(pathname); // start race condition, ignore errors
- if (-1 == ::mkdir(pathname, S_IRWXU)) { // end race condition
- MakeErrMsg(ErrMsg,
- std::string(pathname) + ": can't create temporary directory");
- return Path();
- }
- return Path(pathname);
-#elif defined(HAVE_MKTEMP)
- // If a system doesn't have mkdtemp(3) or mkstemp(3) but it does have
- // mktemp(3) then we'll assume that system (e.g. AIX) has a reasonable
- // implementation of mktemp(3) and doesn't follow BSD 4.3's lead of replacing
- // the XXXXXX with the pid of the process and a letter. That leads to only
- // twenty six temporary files that can be generated.
- char pathname[] = "/tmp/llvm_XXXXXX";
- char *TmpName = ::mktemp(pathname);
- if (TmpName == 0) {
- MakeErrMsg(ErrMsg,
- std::string(TmpName) + ": can't create unique directory name");
- return Path();
- }
- if (-1 == ::mkdir(TmpName, S_IRWXU)) {
- MakeErrMsg(ErrMsg,
- std::string(TmpName) + ": can't create temporary directory");
- return Path();
- }
- return Path(TmpName);
-#else
- // This is the worst case implementation. tempnam(3) leaks memory unless its
- // on an SVID2 (or later) system. On BSD 4.3 it leaks. tmpnam(3) has thread
- // issues. The mktemp(3) function doesn't have enough variability in the
- // temporary name generated. So, we provide our own implementation that
- // increments an integer from a random number seeded by the current time. This
- // should be sufficiently unique that we don't have many collisions between
- // processes. Generally LLVM processes don't run very long and don't use very
- // many temporary files so this shouldn't be a big issue for LLVM.
- static time_t num = ::time(0);
- char pathname[MAXPATHLEN];
- do {
- num++;
- sprintf(pathname, "/tmp/llvm_%010u", unsigned(num));
- } while ( 0 == access(pathname, F_OK ) );
- if (-1 == ::mkdir(pathname, S_IRWXU)) {
- MakeErrMsg(ErrMsg,
- std::string(pathname) + ": can't create temporary directory");
- return Path();
- }
- return Path(pathname);
+static error_code TempDir(SmallVectorImpl<char> &result) {
+ // FIXME: Don't use TMPDIR if program is SUID or SGID enabled.
+ const char *dir = nullptr;
+ (dir = std::getenv("TMPDIR")) || (dir = std::getenv("TMP")) ||
+ (dir = std::getenv("TEMP")) || (dir = std::getenv("TEMPDIR")) ||
+#ifdef P_tmpdir
+ (dir = P_tmpdir) ||
#endif
-}
-
-Path
-Path::GetCurrentDirectory() {
- char pathname[MAXPATHLEN];
- if (!getcwd(pathname, MAXPATHLEN)) {
- assert(false && "Could not query current working directory.");
- return Path();
- }
+ (dir = "/tmp");
- return Path(pathname);
+ result.clear();
+ StringRef d(dir);
+ result.append(d.begin(), d.end());
+ return error_code();
}
+namespace llvm {
+namespace sys {
+namespace fs {
#if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
- defined(__linux__) || defined(__CYGWIN__)
+ defined(__linux__) || defined(__CYGWIN__) || defined(__DragonFly__)
static int
-test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
- const char *dir, const char *bin)
-{
+test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
+{
struct stat sb;
+ char fullpath[PATH_MAX];
- snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
- if (realpath(buf, ret) == NULL)
+ snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin);
+ if (realpath(fullpath, ret) == NULL)
return (1);
- if (stat(buf, &sb) != 0)
+ if (stat(fullpath, &sb) != 0)
return (1);
return (0);
static char *
getprogpath(char ret[PATH_MAX], const char *bin)
{
- char *pv, *s, *t, buf[PATH_MAX];
+ char *pv, *s, *t;
/* First approach: absolute path. */
if (bin[0] == '/') {
- if (test_dir(buf, ret, "/", bin) == 0)
+ if (test_dir(ret, "/", bin) == 0)
return (ret);
return (NULL);
}
/* Second approach: relative path. */
if (strchr(bin, '/') != NULL) {
- if (getcwd(buf, PATH_MAX) == NULL)
+ char cwd[PATH_MAX];
+ if (getcwd(cwd, PATH_MAX) == NULL)
return (NULL);
- if (test_dir(buf, ret, buf, bin) == 0)
+ if (test_dir(ret, cwd, bin) == 0)
return (ret);
return (NULL);
}
if (pv == NULL)
return (NULL);
while ((t = strsep(&s, ":")) != NULL) {
- if (test_dir(buf, ret, t, bin) == 0) {
+ if (test_dir(ret, t, bin) == 0) {
free(pv);
return (ret);
}
/// GetMainExecutable - Return the path to the main executable, given the
/// value of argv[0] from program startup.
-Path Path::GetMainExecutable(const char *argv0, void *MainAddr) {
+std::string getMainExecutable(const char *argv0, void *MainAddr) {
#if defined(__APPLE__)
// On OS X the executable path is saved to the stack by dyld. Reading it
// from there is much faster than calling dladdr, especially for large
if (_NSGetExecutablePath(exe_path, &size) == 0) {
char link_path[MAXPATHLEN];
if (realpath(exe_path, link_path))
- return Path(link_path);
+ return link_path;
}
#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
- defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__)
+ defined(__OpenBSD__) || defined(__minix) || defined(__DragonFly__) || \
+ defined(__FreeBSD_kernel__)
char exe_path[PATH_MAX];
if (getprogpath(exe_path, argv0) != NULL)
- return Path(exe_path);
+ return exe_path;
#elif defined(__linux__) || defined(__CYGWIN__)
char exe_path[MAXPATHLEN];
StringRef aPath("/proc/self/exe");
// /proc is not always mounted under Linux (chroot for example).
ssize_t len = readlink(aPath.str().c_str(), exe_path, sizeof(exe_path));
if (len >= 0)
- return Path(StringRef(exe_path, len));
+ return StringRef(exe_path, len);
} else {
// Fall back to the classical detection.
if (getprogpath(exe_path, argv0) != NULL)
- return Path(exe_path);
+ return exe_path;
}
#elif defined(HAVE_DLFCN_H)
// Use dladdr to get executable path if available.
Dl_info DLInfo;
int err = dladdr(MainAddr, &DLInfo);
if (err == 0)
- return Path();
+ return "";
// If the filename is a symlink, we need to resolve and return the location of
// the actual executable.
char link_path[MAXPATHLEN];
if (realpath(DLInfo.dli_fname, link_path))
- return Path(link_path);
+ return link_path;
#else
#error GetMainExecutable is not implemented on this host yet.
#endif
- return Path();
+ return "";
}
-
-StringRef Path::getDirname() const {
- return getDirnameCharSep(path, "/");
+TimeValue file_status::getLastModificationTime() const {
+ TimeValue Ret;
+ Ret.fromEpochTime(fs_st_mtime);
+ return Ret;
}
-StringRef
-Path::getBasename() const {
- // Find the last slash
- std::string::size_type slash = path.rfind('/');
- if (slash == std::string::npos)
- slash = 0;
- else
- slash++;
-
- std::string::size_type dot = path.rfind('.');
- if (dot == std::string::npos || dot < slash)
- return StringRef(path).substr(slash);
- else
- return StringRef(path).substr(slash, dot - slash);
+UniqueID file_status::getUniqueID() const {
+ return UniqueID(fs_st_dev, fs_st_ino);
}
-StringRef
-Path::getSuffix() const {
- // Find the last slash
- std::string::size_type slash = path.rfind('/');
- if (slash == std::string::npos)
- slash = 0;
- else
- slash++;
+error_code current_path(SmallVectorImpl<char> &result) {
+ result.clear();
- std::string::size_type dot = path.rfind('.');
- if (dot == std::string::npos || dot < slash)
- return StringRef();
- else
- return StringRef(path).substr(dot + 1);
-}
+ const char *pwd = ::getenv("PWD");
+ llvm::sys::fs::file_status PWDStatus, DotStatus;
+ if (pwd && llvm::sys::path::is_absolute(pwd) &&
+ !llvm::sys::fs::status(pwd, PWDStatus) &&
+ !llvm::sys::fs::status(".", DotStatus) &&
+ PWDStatus.getUniqueID() == DotStatus.getUniqueID()) {
+ result.append(pwd, pwd + strlen(pwd));
+ return error_code();
+ }
-bool Path::getMagicNumber(std::string &Magic, unsigned len) const {
- assert(len < 1024 && "Request for magic string too long");
- char Buf[1025];
- int fd = ::open(path.c_str(), O_RDONLY);
- if (fd < 0)
- return false;
- ssize_t bytes_read = ::read(fd, Buf, len);
- ::close(fd);
- if (ssize_t(len) != bytes_read)
- return false;
- Magic.assign(Buf, len);
- return true;
-}
+#ifdef MAXPATHLEN
+ result.reserve(MAXPATHLEN);
+#else
+// For GNU Hurd
+ result.reserve(1024);
+#endif
-bool
-Path::exists() const {
- return 0 == access(path.c_str(), F_OK );
-}
+ while (true) {
+ if (::getcwd(result.data(), result.capacity()) == nullptr) {
+ // See if there was a real error.
+ if (errno != ENOMEM)
+ return error_code(errno, generic_category());
+ // Otherwise there just wasn't enough space.
+ result.reserve(result.capacity() * 2);
+ } else
+ break;
+ }
-bool
-Path::isDirectory() const {
- struct stat buf;
- if (0 != stat(path.c_str(), &buf))
- return false;
- return ((buf.st_mode & S_IFMT) == S_IFDIR) ? true : false;
+ result.set_size(strlen(result.data()));
+ return error_code();
}
-bool
-Path::isSymLink() const {
- struct stat buf;
- if (0 != lstat(path.c_str(), &buf))
- return false;
- return S_ISLNK(buf.st_mode);
-}
+error_code create_directory(const Twine &path, bool IgnoreExisting) {
+ SmallString<128> path_storage;
+ StringRef p = path.toNullTerminatedStringRef(path_storage);
+ if (::mkdir(p.begin(), S_IRWXU | S_IRWXG) == -1) {
+ if (errno != EEXIST || !IgnoreExisting)
+ return error_code(errno, generic_category());
+ }
-bool
-Path::canRead() const {
- return 0 == access(path.c_str(), R_OK);
+ return error_code();
}
-bool
-Path::canWrite() const {
- return 0 == access(path.c_str(), W_OK);
+error_code normalize_separators(SmallVectorImpl<char> &Path) {
+ for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
+ if (*PI == '\\') {
+ auto PN = PI + 1;
+ if (PN < PE && *PN == '\\')
+ ++PI; // increment once, the for loop will move over the escaped slash
+ else
+ *PI = '/';
+ }
+ }
+ return error_code();
}
-bool
-Path::isRegularFile() const {
- // Get the status so we can determine if it's a file or directory
- struct stat buf;
+// Note that we are using symbolic link because hard links are not supported by
+// all filesystems (SMB doesn't).
+error_code create_link(const Twine &to, const Twine &from) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toNullTerminatedStringRef(from_storage);
+ StringRef t = to.toNullTerminatedStringRef(to_storage);
- if (0 != stat(path.c_str(), &buf))
- return false;
-
- if (S_ISREG(buf.st_mode))
- return true;
+ if (::symlink(t.begin(), f.begin()) == -1)
+ return error_code(errno, generic_category());
- return false;
+ return error_code();
}
-bool
-Path::canExecute() const {
- if (0 != access(path.c_str(), R_OK | X_OK ))
- return false;
- struct stat buf;
- if (0 != stat(path.c_str(), &buf))
- return false;
- if (!S_ISREG(buf.st_mode))
- return false;
- return true;
-}
+error_code remove(const Twine &path, bool IgnoreNonExisting) {
+ SmallString<128> path_storage;
+ StringRef p = path.toNullTerminatedStringRef(path_storage);
-StringRef
-Path::getLast() const {
- // Find the last slash
- size_t pos = path.rfind('/');
+ struct stat buf;
+ if (lstat(p.begin(), &buf) != 0) {
+ if (errno != ENOENT || !IgnoreNonExisting)
+ return error_code(errno, generic_category());
+ return error_code();
+ }
- // Handle the corner cases
- if (pos == std::string::npos)
- return path;
+ // Note: this check catches strange situations. In all cases, LLVM should
+ // only be involved in the creation and deletion of regular files. This
+ // check ensures that what we're trying to erase is a regular file. It
+ // effectively prevents LLVM from erasing things like /dev/null, any block
+ // special file, or other things that aren't "regular" files.
+ if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) && !S_ISLNK(buf.st_mode))
+ return make_error_code(std::errc::operation_not_permitted);
- // If the last character is a slash
- if (pos == path.length()-1) {
- // Find the second to last slash
- size_t pos2 = path.rfind('/', pos-1);
- if (pos2 == std::string::npos)
- return StringRef(path).substr(0,pos);
- else
- return StringRef(path).substr(pos2+1,pos-pos2-1);
+ if (::remove(p.begin()) == -1) {
+ if (errno != ENOENT || !IgnoreNonExisting)
+ return error_code(errno, generic_category());
}
- // Return everything after the last slash
- return StringRef(path).substr(pos+1);
-}
-const FileStatus *
-PathWithStatus::getFileStatus(bool update, std::string *ErrStr) const {
- if (!fsIsValid || update) {
- struct stat buf;
- if (0 != stat(path.c_str(), &buf)) {
- MakeErrMsg(ErrStr, path + ": can't get status of file");
- return 0;
- }
- status.fileSize = buf.st_size;
- status.modTime.fromEpochTime(buf.st_mtime);
- status.mode = buf.st_mode;
- status.user = buf.st_uid;
- status.group = buf.st_gid;
- status.uniqueID = uint64_t(buf.st_ino);
- status.isDir = S_ISDIR(buf.st_mode);
- status.isFile = S_ISREG(buf.st_mode);
- fsIsValid = true;
- }
- return &status;
+ return error_code();
}
-static bool AddPermissionBits(const Path &File, int bits) {
- // Get the umask value from the operating system. We want to use it
- // when changing the file's permissions. Since calling umask() sets
- // the umask and returns its old value, we must call it a second
- // time to reset it to the user's preference.
- int mask = umask(0777); // The arg. to umask is arbitrary.
- umask(mask); // Restore the umask.
+error_code rename(const Twine &from, const Twine &to) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toNullTerminatedStringRef(from_storage);
+ StringRef t = to.toNullTerminatedStringRef(to_storage);
- // Get the file's current mode.
- struct stat buf;
- if (0 != stat(File.c_str(), &buf))
- return false;
- // Change the file to have whichever permissions bits from 'bits'
- // that the umask would not disable.
- if ((chmod(File.c_str(), (buf.st_mode | (bits & ~mask)))) == -1)
- return false;
- return true;
-}
+ if (::rename(f.begin(), t.begin()) == -1)
+ return error_code(errno, generic_category());
-bool Path::makeReadableOnDisk(std::string* ErrMsg) {
- if (!AddPermissionBits(*this, 0444))
- return MakeErrMsg(ErrMsg, path + ": can't make file readable");
- return false;
+ return error_code();
}
-bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
- if (!AddPermissionBits(*this, 0222))
- return MakeErrMsg(ErrMsg, path + ": can't make file writable");
- return false;
-}
+error_code resize_file(const Twine &path, uint64_t size) {
+ SmallString<128> path_storage;
+ StringRef p = path.toNullTerminatedStringRef(path_storage);
-bool Path::makeExecutableOnDisk(std::string* ErrMsg) {
- if (!AddPermissionBits(*this, 0111))
- return MakeErrMsg(ErrMsg, path + ": can't make file executable");
- return false;
+ if (::truncate(p.begin(), size) == -1)
+ return error_code(errno, generic_category());
+
+ return error_code();
}
-bool
-Path::getDirectoryContents(std::set<Path>& result, std::string* ErrMsg) const {
- DIR* direntries = ::opendir(path.c_str());
- if (direntries == 0)
- return MakeErrMsg(ErrMsg, path + ": can't open directory");
+error_code exists(const Twine &path, bool &result) {
+ SmallString<128> path_storage;
+ StringRef p = path.toNullTerminatedStringRef(path_storage);
- std::string dirPath = path;
- if (!lastIsSlash(dirPath))
- dirPath += '/';
+ if (::access(p.begin(), F_OK) == -1) {
+ if (errno != ENOENT)
+ return error_code(errno, generic_category());
+ result = false;
+ } else
+ result = true;
- result.clear();
- struct dirent* de = ::readdir(direntries);
- for ( ; de != 0; de = ::readdir(direntries)) {
- if (de->d_name[0] != '.') {
- Path aPath(dirPath + (const char*)de->d_name);
- struct stat st;
- if (0 != lstat(aPath.path.c_str(), &st)) {
- if (S_ISLNK(st.st_mode))
- continue; // dangling symlink -- ignore
- return MakeErrMsg(ErrMsg,
- aPath.path + ": can't determine file object type");
- }
- result.insert(aPath);
- }
- }
+ return error_code();
+}
- closedir(direntries);
- return false;
+bool can_write(const Twine &Path) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
+ return 0 == access(P.begin(), W_OK);
}
-bool
-Path::set(StringRef a_path) {
- if (a_path.empty())
+bool can_execute(const Twine &Path) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
+
+ if (0 != access(P.begin(), R_OK | X_OK))
+ return false;
+ struct stat buf;
+ if (0 != stat(P.begin(), &buf))
+ return false;
+ if (!S_ISREG(buf.st_mode))
return false;
- path = a_path;
return true;
}
-bool
-Path::appendComponent(StringRef name) {
- if (name.empty())
- return false;
- if (!lastIsSlash(path))
- path += '/';
- path += name;
- return true;
+bool equivalent(file_status A, file_status B) {
+ assert(status_known(A) && status_known(B));
+ return A.fs_st_dev == B.fs_st_dev &&
+ A.fs_st_ino == B.fs_st_ino;
}
-bool
-Path::eraseComponent() {
- size_t slashpos = path.rfind('/',path.size());
- if (slashpos == 0 || slashpos == std::string::npos) {
- path.erase();
- return true;
- }
- if (slashpos == path.size() - 1)
- slashpos = path.rfind('/',slashpos-1);
- if (slashpos == std::string::npos) {
- path.erase();
- return true;
- }
- path.erase(slashpos);
- return true;
+error_code equivalent(const Twine &A, const Twine &B, bool &result) {
+ file_status fsA, fsB;
+ if (error_code ec = status(A, fsA)) return ec;
+ if (error_code ec = status(B, fsB)) return ec;
+ result = equivalent(fsA, fsB);
+ return error_code();
}
-bool
-Path::eraseSuffix() {
- size_t dotpos = path.rfind('.',path.size());
- size_t slashpos = path.rfind('/',path.size());
- if (dotpos != std::string::npos) {
- if (slashpos == std::string::npos || dotpos > slashpos+1) {
- path.erase(dotpos, path.size()-dotpos);
- return true;
- }
+static error_code fillStatus(int StatRet, const struct stat &Status,
+ file_status &Result) {
+ if (StatRet != 0) {
+ error_code ec(errno, generic_category());
+ if (ec == std::errc::no_such_file_or_directory)
+ Result = file_status(file_type::file_not_found);
+ else
+ Result = file_status(file_type::status_error);
+ return ec;
}
- return false;
+
+ file_type Type = file_type::type_unknown;
+
+ if (S_ISDIR(Status.st_mode))
+ Type = file_type::directory_file;
+ else if (S_ISREG(Status.st_mode))
+ Type = file_type::regular_file;
+ else if (S_ISBLK(Status.st_mode))
+ Type = file_type::block_file;
+ else if (S_ISCHR(Status.st_mode))
+ Type = file_type::character_file;
+ else if (S_ISFIFO(Status.st_mode))
+ Type = file_type::fifo_file;
+ else if (S_ISSOCK(Status.st_mode))
+ Type = file_type::socket_file;
+
+ perms Perms = static_cast<perms>(Status.st_mode);
+ Result =
+ file_status(Type, Perms, Status.st_dev, Status.st_ino, Status.st_mtime,
+ Status.st_uid, Status.st_gid, Status.st_size);
+
+ return error_code();
+}
+
+error_code status(const Twine &Path, file_status &Result) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
+
+ struct stat Status;
+ int StatRet = ::stat(P.begin(), &Status);
+ return fillStatus(StatRet, Status, Result);
+}
+
+error_code status(int FD, file_status &Result) {
+ struct stat Status;
+ int StatRet = ::fstat(FD, &Status);
+ return fillStatus(StatRet, Status, Result);
+}
+
+error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
+#if defined(HAVE_FUTIMENS)
+ timespec Times[2];
+ Times[0].tv_sec = Time.toEpochTime();
+ Times[0].tv_nsec = 0;
+ Times[1] = Times[0];
+ if (::futimens(FD, Times))
+ return error_code(errno, generic_category());
+ return error_code();
+#elif defined(HAVE_FUTIMES)
+ timeval Times[2];
+ Times[0].tv_sec = Time.toEpochTime();
+ Times[0].tv_usec = 0;
+ Times[1] = Times[0];
+ if (::futimes(FD, Times))
+ return error_code(errno, generic_category());
+ return error_code();
+#else
+#warning Missing futimes() and futimens()
+ return make_error_code(std::errc::not_supported);
+#endif
}
-static bool createDirectoryHelper(char* beg, char* end, bool create_parents) {
+error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
+ AutoFD ScopedFD(FD);
+ if (!CloseFD)
+ ScopedFD.take();
- if (access(beg, R_OK | W_OK) == 0)
- return false;
+ // Figure out how large the file is.
+ struct stat FileInfo;
+ if (fstat(FD, &FileInfo) == -1)
+ return error_code(errno, generic_category());
+ uint64_t FileSize = FileInfo.st_size;
- if (create_parents) {
+ if (Size == 0)
+ Size = FileSize;
+ else if (FileSize < Size) {
+ // We need to grow the file.
+ if (ftruncate(FD, Size) == -1)
+ return error_code(errno, generic_category());
+ }
- char* c = end;
+ int flags = (Mode == readwrite) ? MAP_SHARED : MAP_PRIVATE;
+ int prot = (Mode == readonly) ? PROT_READ : (PROT_READ | PROT_WRITE);
+#ifdef MAP_FILE
+ flags |= MAP_FILE;
+#endif
+ Mapping = ::mmap(nullptr, Size, prot, flags, FD, Offset);
+ if (Mapping == MAP_FAILED)
+ return error_code(errno, generic_category());
+ return error_code();
+}
+
+mapped_file_region::mapped_file_region(const Twine &path,
+ mapmode mode,
+ uint64_t length,
+ uint64_t offset,
+ error_code &ec)
+ : Mode(mode)
+ , Size(length)
+ , Mapping() {
+ // Make sure that the requested size fits within SIZE_T.
+ if (length > std::numeric_limits<size_t>::max()) {
+ ec = make_error_code(std::errc::invalid_argument);
+ return;
+ }
- for (; c != beg; --c)
- if (*c == '/') {
+ SmallString<128> path_storage;
+ StringRef name = path.toNullTerminatedStringRef(path_storage);
+ int oflags = (mode == readonly) ? O_RDONLY : O_RDWR;
+ int ofd = ::open(name.begin(), oflags);
+ if (ofd == -1) {
+ ec = error_code(errno, generic_category());
+ return;
+ }
- // Recurse to handling the parent directory.
- *c = '\0';
- bool x = createDirectoryHelper(beg, c, create_parents);
- *c = '/';
+ ec = init(ofd, true, offset);
+ if (ec)
+ Mapping = nullptr;
+}
+
+mapped_file_region::mapped_file_region(int fd,
+ bool closefd,
+ mapmode mode,
+ uint64_t length,
+ uint64_t offset,
+ error_code &ec)
+ : Mode(mode)
+ , Size(length)
+ , Mapping() {
+ // Make sure that the requested size fits within SIZE_T.
+ if (length > std::numeric_limits<size_t>::max()) {
+ ec = make_error_code(std::errc::invalid_argument);
+ return;
+ }
- // Return if we encountered an error.
- if (x)
- return true;
+ ec = init(fd, closefd, offset);
+ if (ec)
+ Mapping = nullptr;
+}
- break;
- }
- }
+mapped_file_region::~mapped_file_region() {
+ if (Mapping)
+ ::munmap(Mapping, Size);
+}
- return mkdir(beg, S_IRWXU | S_IRWXG) != 0;
+mapped_file_region::mapped_file_region(mapped_file_region &&other)
+ : Mode(other.Mode), Size(other.Size), Mapping(other.Mapping) {
+ other.Mapping = nullptr;
}
-bool
-Path::createDirectoryOnDisk( bool create_parents, std::string* ErrMsg ) {
- // Get a writeable copy of the path name
- std::string pathname(path);
+mapped_file_region::mapmode mapped_file_region::flags() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return Mode;
+}
- // Null-terminate the last component
- size_t lastchar = path.length() - 1 ;
+uint64_t mapped_file_region::size() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return Size;
+}
- if (pathname[lastchar] != '/')
- ++lastchar;
+char *mapped_file_region::data() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ assert(Mode != readonly && "Cannot get non-const data for readonly mapping!");
+ return reinterpret_cast<char*>(Mapping);
+}
- pathname[lastchar] = '\0';
+const char *mapped_file_region::const_data() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return reinterpret_cast<const char*>(Mapping);
+}
- if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents))
- return MakeErrMsg(ErrMsg, pathname + ": can't create directory");
+int mapped_file_region::alignment() {
+ return process::get_self()->page_size();
+}
- return false;
+error_code detail::directory_iterator_construct(detail::DirIterState &it,
+ StringRef path){
+ SmallString<128> path_null(path);
+ DIR *directory = ::opendir(path_null.c_str());
+ if (!directory)
+ return error_code(errno, generic_category());
+
+ it.IterationHandle = reinterpret_cast<intptr_t>(directory);
+ // Add something for replace_filename to replace.
+ path::append(path_null, ".");
+ it.CurrentEntry = directory_entry(path_null.str());
+ return directory_iterator_increment(it);
}
-bool
-Path::createFileOnDisk(std::string* ErrMsg) {
- // Create the file
- int fd = ::creat(path.c_str(), S_IRUSR | S_IWUSR);
- if (fd < 0)
- return MakeErrMsg(ErrMsg, path + ": can't create file");
- ::close(fd);
- return false;
+error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
+ if (it.IterationHandle)
+ ::closedir(reinterpret_cast<DIR *>(it.IterationHandle));
+ it.IterationHandle = 0;
+ it.CurrentEntry = directory_entry();
+ return error_code();
}
-bool
-Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
- // Make this into a unique file name
- if (makeUnique( reuse_current, ErrMsg ))
- return true;
+error_code detail::directory_iterator_increment(detail::DirIterState &it) {
+ errno = 0;
+ dirent *cur_dir = ::readdir(reinterpret_cast<DIR *>(it.IterationHandle));
+ if (cur_dir == nullptr && errno != 0) {
+ return error_code(errno, generic_category());
+ } else if (cur_dir != nullptr) {
+ StringRef name(cur_dir->d_name, NAMLEN(cur_dir));
+ if ((name.size() == 1 && name[0] == '.') ||
+ (name.size() == 2 && name[0] == '.' && name[1] == '.'))
+ return directory_iterator_increment(it);
+ it.CurrentEntry.replace_filename(name);
+ } else
+ return directory_iterator_destruct(it);
- // create the file
- int fd = ::open(path.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666);
- if (fd < 0)
- return MakeErrMsg(ErrMsg, path + ": can't create temporary file");
- ::close(fd);
- return false;
+ return error_code();
}
-bool
-Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
- // Get the status so we can determine if it's a file or directory.
- struct stat buf;
- if (0 != stat(path.c_str(), &buf)) {
- MakeErrMsg(ErrStr, path + ": can't get status of file");
- return true;
- }
+error_code get_magic(const Twine &path, uint32_t len,
+ SmallVectorImpl<char> &result) {
+ SmallString<128> PathStorage;
+ StringRef Path = path.toNullTerminatedStringRef(PathStorage);
+ result.set_size(0);
- // Note: this check catches strange situations. In all cases, LLVM should
- // only be involved in the creation and deletion of regular files. This
- // check ensures that what we're trying to erase is a regular file. It
- // effectively prevents LLVM from erasing things like /dev/null, any block
- // special file, or other things that aren't "regular" files.
- if (S_ISREG(buf.st_mode)) {
- if (unlink(path.c_str()) != 0)
- return MakeErrMsg(ErrStr, path + ": can't destroy file");
- return false;
- }
+ // Open path.
+ std::FILE *file = std::fopen(Path.data(), "rb");
+ if (!file)
+ return error_code(errno, generic_category());
- if (!S_ISDIR(buf.st_mode)) {
- if (ErrStr) *ErrStr = "not a file or directory";
- return true;
- }
+ // Reserve storage.
+ result.reserve(len);
- if (remove_contents) {
- // Recursively descend the directory to remove its contents.
- std::string cmd = "/bin/rm -rf " + path;
- if (system(cmd.c_str()) != 0) {
- MakeErrMsg(ErrStr, path + ": failed to recursively remove directory.");
- return true;
+ // Read magic!
+ size_t size = std::fread(result.data(), 1, len, file);
+ if (std::ferror(file) != 0) {
+ std::fclose(file);
+ return error_code(errno, generic_category());
+ } else if (size != len) {
+ if (std::feof(file) != 0) {
+ std::fclose(file);
+ result.set_size(size);
+ return make_error_code(std::errc::value_too_large);
}
- return false;
}
-
- // Otherwise, try to just remove the one directory.
- std::string pathname(path);
- size_t lastchar = path.length() - 1;
- if (pathname[lastchar] == '/')
- pathname[lastchar] = '\0';
- else
- pathname[lastchar+1] = '\0';
-
- if (rmdir(pathname.c_str()) != 0)
- return MakeErrMsg(ErrStr, pathname + ": can't erase directory");
- return false;
+ std::fclose(file);
+ result.set_size(size);
+ return error_code();
}
-bool
-Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
- if (0 != ::rename(path.c_str(), newName.c_str()))
- return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
- newName.str() + "'");
- return false;
+error_code openFileForRead(const Twine &Name, int &ResultFD) {
+ SmallString<128> Storage;
+ StringRef P = Name.toNullTerminatedStringRef(Storage);
+ while ((ResultFD = open(P.begin(), O_RDONLY)) < 0) {
+ if (errno != EINTR)
+ return error_code(errno, generic_category());
+ }
+ return error_code();
}
-bool
-Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrStr) const {
- struct utimbuf utb;
- utb.actime = si.modTime.toPosixTime();
- utb.modtime = utb.actime;
- if (0 != ::utime(path.c_str(),&utb))
- return MakeErrMsg(ErrStr, path + ": can't set file modification time");
- if (0 != ::chmod(path.c_str(),si.mode))
- return MakeErrMsg(ErrStr, path + ": can't set mode");
- return false;
-}
+error_code openFileForWrite(const Twine &Name, int &ResultFD,
+ sys::fs::OpenFlags Flags, unsigned Mode) {
+ // Verify that we don't have both "append" and "excl".
+ assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
+ "Cannot specify both 'excl' and 'append' file creation flags!");
-bool
-sys::CopyFile(const sys::Path &Dest, const sys::Path &Src, std::string* ErrMsg){
- int inFile = -1;
- int outFile = -1;
- inFile = ::open(Src.c_str(), O_RDONLY);
- if (inFile == -1)
- return MakeErrMsg(ErrMsg, Src.str() +
- ": can't open source file to copy");
-
- outFile = ::open(Dest.c_str(), O_WRONLY|O_CREAT, 0666);
- if (outFile == -1) {
- ::close(inFile);
- return MakeErrMsg(ErrMsg, Dest.str() +
- ": can't create destination file for copy");
- }
+ int OpenFlags = O_CREAT;
- char Buffer[16*1024];
- while (ssize_t Amt = ::read(inFile, Buffer, 16*1024)) {
- if (Amt == -1) {
- if (errno != EINTR && errno != EAGAIN) {
- ::close(inFile);
- ::close(outFile);
- return MakeErrMsg(ErrMsg, Src.str()+": can't read source file");
- }
- } else {
- char *BufPtr = Buffer;
- while (Amt) {
- ssize_t AmtWritten = ::write(outFile, BufPtr, Amt);
- if (AmtWritten == -1) {
- if (errno != EINTR && errno != EAGAIN) {
- ::close(inFile);
- ::close(outFile);
- return MakeErrMsg(ErrMsg, Dest.str() +
- ": can't write destination file");
- }
- } else {
- Amt -= AmtWritten;
- BufPtr += AmtWritten;
- }
- }
- }
- }
- ::close(inFile);
- ::close(outFile);
- return false;
-}
+ if (Flags & F_RW)
+ OpenFlags |= O_RDWR;
+ else
+ OpenFlags |= O_WRONLY;
-bool
-Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
- bool Exists;
- if (reuse_current && (fs::exists(path, Exists) || !Exists))
- return false; // File doesn't exist already, just use it!
-
- // Append an XXXXXX pattern to the end of the file for use with mkstemp,
- // mktemp or our own implementation.
- // This uses std::vector instead of SmallVector to avoid a dependence on
- // libSupport. And performance isn't critical here.
- std::vector<char> Buf;
- Buf.resize(path.size()+8);
- char *FNBuffer = &Buf[0];
- path.copy(FNBuffer,path.size());
- bool isdir;
- if (!fs::is_directory(path, isdir) && isdir)
- strcpy(FNBuffer+path.size(), "/XXXXXX");
+ if (Flags & F_Append)
+ OpenFlags |= O_APPEND;
else
- strcpy(FNBuffer+path.size(), "-XXXXXX");
+ OpenFlags |= O_TRUNC;
-#if defined(HAVE_MKSTEMP)
- int TempFD;
- if ((TempFD = mkstemp(FNBuffer)) == -1)
- return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
+ if (Flags & F_Excl)
+ OpenFlags |= O_EXCL;
+
+ SmallString<128> Storage;
+ StringRef P = Name.toNullTerminatedStringRef(Storage);
+ while ((ResultFD = open(P.begin(), OpenFlags, Mode)) < 0) {
+ if (errno != EINTR)
+ return error_code(errno, generic_category());
+ }
+ return error_code();
+}
- // We don't need to hold the temp file descriptor... we will trust that no one
- // will overwrite/delete the file before we can open it again.
- close(TempFD);
+} // end namespace fs
- // Save the name
- path = FNBuffer;
+namespace path {
- // By default mkstemp sets the mode to 0600, so update mode bits now.
- AddPermissionBits (*this, 0666);
-#elif defined(HAVE_MKTEMP)
- // If we don't have mkstemp, use the old and obsolete mktemp function.
- if (mktemp(FNBuffer) == 0)
- return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
+bool home_directory(SmallVectorImpl<char> &result) {
+ if (char *RequestedDir = getenv("HOME")) {
+ result.clear();
+ result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
+ return true;
+ }
- // Save the name
- path = FNBuffer;
-#else
- // Okay, looks like we have to do it all by our lonesome.
- static unsigned FCounter = 0;
- // Try to initialize with unique value.
- if (FCounter == 0) FCounter = ((unsigned)getpid() & 0xFFFF) << 8;
- char* pos = strstr(FNBuffer, "XXXXXX");
- do {
- if (++FCounter > 0xFFFFFF) {
- return MakeErrMsg(ErrMsg,
- path + ": can't make unique filename: too many files");
- }
- sprintf(pos, "%06X", FCounter);
- path = FNBuffer;
- } while (exists());
- // POSSIBLE SECURITY BUG: An attacker can easily guess the name and exploit
- // LLVM.
-#endif
return false;
}
-const char *Path::MapInFilePages(int FD, size_t FileSize, off_t Offset) {
- int Flags = MAP_PRIVATE;
-#ifdef MAP_FILE
- Flags |= MAP_FILE;
-#endif
- void *BasePtr = ::mmap(0, FileSize, PROT_READ, Flags, FD, Offset);
- if (BasePtr == MAP_FAILED)
- return 0;
- return (const char*)BasePtr;
-}
-
-void Path::UnMapFilePages(const char *BasePtr, size_t FileSize) {
- const void *Addr = static_cast<const void *>(BasePtr);
- ::munmap(const_cast<void *>(Addr), FileSize);
-}
+} // end namespace path
-} // end llvm namespace
+} // end namespace sys
+} // end namespace llvm
projects / oota-llvm.git / blobdiff