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Some users (clang, libTooling) require this. After this patch we can remove the calls to getenv("PWD") from clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188125 91177308-0d34-0410-b5e6-96231b3b80d8
797 lines
23 KiB
C++
797 lines
23 KiB
C++
//===- llvm/Support/Unix/Path.inc - Unix Path Implementation ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Unix specific implementation of the Path API.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on *all* UNIX variants.
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//===----------------------------------------------------------------------===//
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#include "Unix.h"
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#include "llvm/Support/Process.h"
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#include <limits.h>
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#include <stdio.h>
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#if HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#if HAVE_DIRENT_H
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# include <dirent.h>
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# define NAMLEN(dirent) strlen((dirent)->d_name)
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#else
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# define dirent direct
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# define NAMLEN(dirent) (dirent)->d_namlen
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# if HAVE_SYS_NDIR_H
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# include <sys/ndir.h>
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# endif
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# if HAVE_SYS_DIR_H
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# include <sys/dir.h>
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# endif
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# if HAVE_NDIR_H
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# include <ndir.h>
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# endif
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#endif
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#ifdef __APPLE__
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#include <mach-o/dyld.h>
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#endif
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// Both stdio.h and cstdio are included via different pathes and
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// stdcxx's cstdio doesn't include stdio.h, so it doesn't #undef the macros
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// either.
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#undef ferror
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#undef feof
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// For GNU Hurd
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#if defined(__GNU__) && !defined(PATH_MAX)
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# define PATH_MAX 4096
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#endif
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using namespace llvm;
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namespace {
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/// This class automatically closes the given file descriptor when it goes out
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/// of scope. You can take back explicit ownership of the file descriptor by
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/// calling take(). The destructor does not verify that close was successful.
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/// Therefore, never allow this class to call close on a file descriptor that
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/// has been read from or written to.
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struct AutoFD {
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int FileDescriptor;
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AutoFD(int fd) : FileDescriptor(fd) {}
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~AutoFD() {
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if (FileDescriptor >= 0)
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::close(FileDescriptor);
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}
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int take() {
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int ret = FileDescriptor;
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FileDescriptor = -1;
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return ret;
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}
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operator int() const {return FileDescriptor;}
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};
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error_code TempDir(SmallVectorImpl<char> &result) {
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// FIXME: Don't use TMPDIR if program is SUID or SGID enabled.
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const char *dir = 0;
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(dir = std::getenv("TMPDIR" )) ||
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(dir = std::getenv("TMP" )) ||
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(dir = std::getenv("TEMP" )) ||
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(dir = std::getenv("TEMPDIR")) ||
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#ifdef P_tmpdir
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(dir = P_tmpdir) ||
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#endif
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(dir = "/tmp");
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result.clear();
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StringRef d(dir);
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result.append(d.begin(), d.end());
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return error_code::success();
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}
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}
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static error_code createUniqueEntity(const Twine &Model, int &ResultFD,
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SmallVectorImpl<char> &ResultPath,
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bool MakeAbsolute, unsigned Mode,
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FSEntity Type) {
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SmallString<128> ModelStorage;
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Model.toVector(ModelStorage);
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if (MakeAbsolute) {
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// Make model absolute by prepending a temp directory if it's not already.
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bool absolute = sys::path::is_absolute(Twine(ModelStorage));
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if (!absolute) {
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SmallString<128> TDir;
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if (error_code ec = TempDir(TDir)) return ec;
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sys::path::append(TDir, Twine(ModelStorage));
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ModelStorage.swap(TDir);
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}
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}
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// From here on, DO NOT modify model. It may be needed if the randomly chosen
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// path already exists.
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ResultPath = ModelStorage;
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// Null terminate.
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ResultPath.push_back(0);
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ResultPath.pop_back();
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retry_random_path:
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// Replace '%' with random chars.
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for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
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if (ModelStorage[i] == '%')
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ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
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}
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// Try to open + create the file.
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switch (Type) {
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case FS_File: {
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int RandomFD = ::open(ResultPath.begin(), O_RDWR | O_CREAT | O_EXCL, Mode);
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if (RandomFD == -1) {
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int SavedErrno = errno;
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// If the file existed, try again, otherwise, error.
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if (SavedErrno == errc::file_exists)
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goto retry_random_path;
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return error_code(SavedErrno, system_category());
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}
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ResultFD = RandomFD;
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return error_code::success();
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}
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case FS_Name: {
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bool Exists;
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error_code EC = sys::fs::exists(ResultPath.begin(), Exists);
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if (EC)
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return EC;
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if (Exists)
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goto retry_random_path;
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return error_code::success();
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}
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case FS_Dir: {
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bool Existed;
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error_code EC = sys::fs::create_directory(ResultPath.begin(), Existed);
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if (EC)
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return EC;
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if (Existed)
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goto retry_random_path;
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return error_code::success();
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}
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}
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llvm_unreachable("Invalid Type");
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}
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namespace llvm {
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namespace sys {
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namespace fs {
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#if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
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defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
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defined(__linux__) || defined(__CYGWIN__)
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static int
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test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
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const char *dir, const char *bin)
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{
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struct stat sb;
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snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
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if (realpath(buf, ret) == NULL)
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return (1);
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if (stat(buf, &sb) != 0)
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return (1);
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return (0);
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}
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static char *
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getprogpath(char ret[PATH_MAX], const char *bin)
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{
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char *pv, *s, *t, buf[PATH_MAX];
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/* First approach: absolute path. */
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if (bin[0] == '/') {
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if (test_dir(buf, ret, "/", bin) == 0)
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return (ret);
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return (NULL);
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}
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/* Second approach: relative path. */
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if (strchr(bin, '/') != NULL) {
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if (getcwd(buf, PATH_MAX) == NULL)
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return (NULL);
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if (test_dir(buf, ret, buf, bin) == 0)
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return (ret);
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return (NULL);
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}
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/* Third approach: $PATH */
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if ((pv = getenv("PATH")) == NULL)
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return (NULL);
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s = pv = strdup(pv);
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if (pv == NULL)
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return (NULL);
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while ((t = strsep(&s, ":")) != NULL) {
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if (test_dir(buf, ret, t, bin) == 0) {
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free(pv);
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return (ret);
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}
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}
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free(pv);
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return (NULL);
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}
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#endif // __FreeBSD__ || __NetBSD__ || __FreeBSD_kernel__
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/// GetMainExecutable - Return the path to the main executable, given the
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/// value of argv[0] from program startup.
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std::string getMainExecutable(const char *argv0, void *MainAddr) {
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#if defined(__APPLE__)
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// On OS X the executable path is saved to the stack by dyld. Reading it
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// from there is much faster than calling dladdr, especially for large
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// binaries with symbols.
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char exe_path[MAXPATHLEN];
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uint32_t size = sizeof(exe_path);
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if (_NSGetExecutablePath(exe_path, &size) == 0) {
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char link_path[MAXPATHLEN];
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if (realpath(exe_path, link_path))
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return link_path;
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}
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#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
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defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__)
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char exe_path[PATH_MAX];
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if (getprogpath(exe_path, argv0) != NULL)
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return exe_path;
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#elif defined(__linux__) || defined(__CYGWIN__)
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char exe_path[MAXPATHLEN];
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StringRef aPath("/proc/self/exe");
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if (sys::fs::exists(aPath)) {
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// /proc is not always mounted under Linux (chroot for example).
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ssize_t len = readlink(aPath.str().c_str(), exe_path, sizeof(exe_path));
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if (len >= 0)
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return StringRef(exe_path, len);
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} else {
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// Fall back to the classical detection.
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if (getprogpath(exe_path, argv0) != NULL)
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return exe_path;
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}
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#elif defined(HAVE_DLFCN_H)
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// Use dladdr to get executable path if available.
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Dl_info DLInfo;
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int err = dladdr(MainAddr, &DLInfo);
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if (err == 0)
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return "";
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// If the filename is a symlink, we need to resolve and return the location of
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// the actual executable.
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char link_path[MAXPATHLEN];
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if (realpath(DLInfo.dli_fname, link_path))
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return link_path;
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#else
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#error GetMainExecutable is not implemented on this host yet.
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#endif
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return "";
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}
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TimeValue file_status::getLastModificationTime() const {
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TimeValue Ret;
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Ret.fromEpochTime(fs_st_mtime);
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return Ret;
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}
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UniqueID file_status::getUniqueID() const {
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return UniqueID(fs_st_dev, fs_st_ino);
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}
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error_code current_path(SmallVectorImpl<char> &result) {
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result.clear();
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const char *pwd = ::getenv("PWD");
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llvm::sys::fs::file_status PWDStatus, DotStatus;
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if (pwd && llvm::sys::path::is_absolute(pwd) &&
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!llvm::sys::fs::status(pwd, PWDStatus) &&
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!llvm::sys::fs::status(".", DotStatus) &&
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PWDStatus.getUniqueID() == DotStatus.getUniqueID()) {
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result.append(pwd, pwd + strlen(pwd));
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return error_code::success();
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}
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#ifdef MAXPATHLEN
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result.reserve(MAXPATHLEN);
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#else
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// For GNU Hurd
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result.reserve(1024);
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#endif
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while (true) {
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if (::getcwd(result.data(), result.capacity()) == 0) {
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// See if there was a real error.
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if (errno != errc::not_enough_memory)
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return error_code(errno, system_category());
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// Otherwise there just wasn't enough space.
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result.reserve(result.capacity() * 2);
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} else
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break;
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}
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result.set_size(strlen(result.data()));
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return error_code::success();
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}
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error_code create_directory(const Twine &path, bool &existed) {
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SmallString<128> path_storage;
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StringRef p = path.toNullTerminatedStringRef(path_storage);
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if (::mkdir(p.begin(), S_IRWXU | S_IRWXG) == -1) {
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if (errno != errc::file_exists)
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return error_code(errno, system_category());
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existed = true;
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} else
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existed = false;
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return error_code::success();
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}
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error_code create_hard_link(const Twine &to, const Twine &from) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toNullTerminatedStringRef(from_storage);
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StringRef t = to.toNullTerminatedStringRef(to_storage);
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if (::link(t.begin(), f.begin()) == -1)
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return error_code(errno, system_category());
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return error_code::success();
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}
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error_code create_symlink(const Twine &to, const Twine &from) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toNullTerminatedStringRef(from_storage);
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StringRef t = to.toNullTerminatedStringRef(to_storage);
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if (::symlink(t.begin(), f.begin()) == -1)
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return error_code(errno, system_category());
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return error_code::success();
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}
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error_code remove(const Twine &path, bool &existed) {
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SmallString<128> path_storage;
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StringRef p = path.toNullTerminatedStringRef(path_storage);
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struct stat buf;
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if (stat(p.begin(), &buf) != 0) {
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if (errno != errc::no_such_file_or_directory)
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return error_code(errno, system_category());
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existed = false;
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return error_code::success();
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}
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// Note: this check catches strange situations. In all cases, LLVM should
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// only be involved in the creation and deletion of regular files. This
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// check ensures that what we're trying to erase is a regular file. It
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// effectively prevents LLVM from erasing things like /dev/null, any block
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// special file, or other things that aren't "regular" files.
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if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode))
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return make_error_code(errc::operation_not_permitted);
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if (::remove(p.begin()) == -1) {
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if (errno != errc::no_such_file_or_directory)
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return error_code(errno, system_category());
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existed = false;
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} else
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existed = true;
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return error_code::success();
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}
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error_code rename(const Twine &from, const Twine &to) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toNullTerminatedStringRef(from_storage);
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StringRef t = to.toNullTerminatedStringRef(to_storage);
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if (::rename(f.begin(), t.begin()) == -1)
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return error_code(errno, system_category());
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return error_code::success();
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}
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error_code resize_file(const Twine &path, uint64_t size) {
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SmallString<128> path_storage;
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StringRef p = path.toNullTerminatedStringRef(path_storage);
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if (::truncate(p.begin(), size) == -1)
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return error_code(errno, system_category());
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return error_code::success();
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}
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error_code exists(const Twine &path, bool &result) {
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SmallString<128> path_storage;
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StringRef p = path.toNullTerminatedStringRef(path_storage);
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if (::access(p.begin(), F_OK) == -1) {
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if (errno != errc::no_such_file_or_directory)
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return error_code(errno, system_category());
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result = false;
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} else
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result = true;
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return error_code::success();
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}
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bool can_write(const Twine &Path) {
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SmallString<128> PathStorage;
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StringRef P = Path.toNullTerminatedStringRef(PathStorage);
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return 0 == access(P.begin(), W_OK);
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}
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bool can_execute(const Twine &Path) {
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SmallString<128> PathStorage;
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StringRef P = Path.toNullTerminatedStringRef(PathStorage);
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if (0 != access(P.begin(), R_OK | X_OK))
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return false;
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struct stat buf;
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if (0 != stat(P.begin(), &buf))
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return false;
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if (!S_ISREG(buf.st_mode))
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return false;
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return true;
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}
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bool equivalent(file_status A, file_status B) {
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assert(status_known(A) && status_known(B));
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return A.fs_st_dev == B.fs_st_dev &&
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A.fs_st_ino == B.fs_st_ino;
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}
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error_code equivalent(const Twine &A, const Twine &B, bool &result) {
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file_status fsA, fsB;
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if (error_code ec = status(A, fsA)) return ec;
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if (error_code ec = status(B, fsB)) return ec;
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result = equivalent(fsA, fsB);
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return error_code::success();
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}
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static error_code fillStatus(int StatRet, const struct stat &Status,
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file_status &Result) {
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if (StatRet != 0) {
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error_code ec(errno, system_category());
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if (ec == errc::no_such_file_or_directory)
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Result = file_status(file_type::file_not_found);
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else
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Result = file_status(file_type::status_error);
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return ec;
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}
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file_type Type = file_type::type_unknown;
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if (S_ISDIR(Status.st_mode))
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Type = file_type::directory_file;
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else if (S_ISREG(Status.st_mode))
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Type = file_type::regular_file;
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else if (S_ISBLK(Status.st_mode))
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Type = file_type::block_file;
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else if (S_ISCHR(Status.st_mode))
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Type = file_type::character_file;
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else if (S_ISFIFO(Status.st_mode))
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Type = file_type::fifo_file;
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else if (S_ISSOCK(Status.st_mode))
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Type = file_type::socket_file;
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perms Perms = static_cast<perms>(Status.st_mode);
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Result =
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file_status(Type, Perms, Status.st_dev, Status.st_ino, Status.st_mtime,
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Status.st_uid, Status.st_gid, Status.st_size);
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return error_code::success();
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}
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error_code status(const Twine &Path, file_status &Result) {
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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.toPosixTime();
|
|
Times[0].tv_nsec = 0;
|
|
Times[1] = Times[0];
|
|
if (::futimens(FD, Times))
|
|
#elif defined(HAVE_FUTIMES)
|
|
timeval Times[2];
|
|
Times[0].tv_sec = Time.toPosixTime();
|
|
Times[0].tv_usec = 0;
|
|
Times[1] = Times[0];
|
|
if (::futimes(FD, Times))
|
|
#else
|
|
#error Missing futimes() and futimens()
|
|
#endif
|
|
return error_code(errno, system_category());
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
|
|
AutoFD ScopedFD(FD);
|
|
if (!CloseFD)
|
|
ScopedFD.take();
|
|
|
|
// Figure out how large the file is.
|
|
struct stat FileInfo;
|
|
if (fstat(FD, &FileInfo) == -1)
|
|
return error_code(errno, system_category());
|
|
uint64_t FileSize = FileInfo.st_size;
|
|
|
|
if (Size == 0)
|
|
Size = FileSize;
|
|
else if (FileSize < Size) {
|
|
// We need to grow the file.
|
|
if (ftruncate(FD, Size) == -1)
|
|
return error_code(errno, system_category());
|
|
}
|
|
|
|
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(0, Size, prot, flags, FD, Offset);
|
|
if (Mapping == MAP_FAILED)
|
|
return error_code(errno, system_category());
|
|
return error_code::success();
|
|
}
|
|
|
|
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(errc::invalid_argument);
|
|
return;
|
|
}
|
|
|
|
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, system_category());
|
|
return;
|
|
}
|
|
|
|
ec = init(ofd, true, offset);
|
|
if (ec)
|
|
Mapping = 0;
|
|
}
|
|
|
|
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(errc::invalid_argument);
|
|
return;
|
|
}
|
|
|
|
ec = init(fd, closefd, offset);
|
|
if (ec)
|
|
Mapping = 0;
|
|
}
|
|
|
|
mapped_file_region::~mapped_file_region() {
|
|
if (Mapping)
|
|
::munmap(Mapping, Size);
|
|
}
|
|
|
|
#if LLVM_HAS_RVALUE_REFERENCES
|
|
mapped_file_region::mapped_file_region(mapped_file_region &&other)
|
|
: Mode(other.Mode), Size(other.Size), Mapping(other.Mapping) {
|
|
other.Mapping = 0;
|
|
}
|
|
#endif
|
|
|
|
mapped_file_region::mapmode mapped_file_region::flags() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return Mode;
|
|
}
|
|
|
|
uint64_t mapped_file_region::size() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return Size;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
const char *mapped_file_region::const_data() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return reinterpret_cast<const char*>(Mapping);
|
|
}
|
|
|
|
int mapped_file_region::alignment() {
|
|
return process::get_self()->page_size();
|
|
}
|
|
|
|
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 == 0)
|
|
return error_code(errno, system_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);
|
|
}
|
|
|
|
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::success();
|
|
}
|
|
|
|
error_code detail::directory_iterator_increment(detail::DirIterState &it) {
|
|
errno = 0;
|
|
dirent *cur_dir = ::readdir(reinterpret_cast<DIR *>(it.IterationHandle));
|
|
if (cur_dir == 0 && errno != 0) {
|
|
return error_code(errno, system_category());
|
|
} else if (cur_dir != 0) {
|
|
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);
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
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);
|
|
|
|
// Open path.
|
|
std::FILE *file = std::fopen(Path.data(), "rb");
|
|
if (file == 0)
|
|
return error_code(errno, system_category());
|
|
|
|
// Reserve storage.
|
|
result.reserve(len);
|
|
|
|
// Read magic!
|
|
size_t size = std::fread(result.data(), 1, len, file);
|
|
if (std::ferror(file) != 0) {
|
|
std::fclose(file);
|
|
return error_code(errno, system_category());
|
|
} else if (size != len) {
|
|
if (std::feof(file) != 0) {
|
|
std::fclose(file);
|
|
result.set_size(size);
|
|
return make_error_code(errc::value_too_large);
|
|
}
|
|
}
|
|
std::fclose(file);
|
|
result.set_size(size);
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,
|
|
bool map_writable, void *&result) {
|
|
SmallString<128> path_storage;
|
|
StringRef name = path.toNullTerminatedStringRef(path_storage);
|
|
int oflags = map_writable ? O_RDWR : O_RDONLY;
|
|
int ofd = ::open(name.begin(), oflags);
|
|
if ( ofd == -1 )
|
|
return error_code(errno, system_category());
|
|
AutoFD fd(ofd);
|
|
int flags = map_writable ? MAP_SHARED : MAP_PRIVATE;
|
|
int prot = map_writable ? (PROT_READ|PROT_WRITE) : PROT_READ;
|
|
#ifdef MAP_FILE
|
|
flags |= MAP_FILE;
|
|
#endif
|
|
result = ::mmap(0, size, prot, flags, fd, file_offset);
|
|
if (result == MAP_FAILED) {
|
|
return error_code(errno, system_category());
|
|
}
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code unmap_file_pages(void *base, size_t size) {
|
|
if ( ::munmap(base, size) == -1 )
|
|
return error_code(errno, system_category());
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
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, system_category());
|
|
}
|
|
return error_code::success();
|
|
}
|
|
|
|
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!");
|
|
|
|
int OpenFlags = O_WRONLY | O_CREAT;
|
|
|
|
if (Flags & F_Append)
|
|
OpenFlags |= O_APPEND;
|
|
else
|
|
OpenFlags |= O_TRUNC;
|
|
|
|
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, system_category());
|
|
}
|
|
return error_code::success();
|
|
}
|
|
|
|
} // end namespace fs
|
|
} // end namespace sys
|
|
} // end namespace llvm
|