#include "Unix.h"
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.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)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#if HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
#ifdef __CYGWIN__
# undef HAVE_MKDTEMP
#endif
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) {}
Path&
Path::operator=(StringRef that) {
path.assign(that.data(), that.size());
return *this;
}
bool
Path::isValid() const {
return !path.empty();
}
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)
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)
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); if (-1 == ::mkdir(pathname, S_IRWXU)) { MakeErrMsg(ErrMsg,
std::string(pathname) + ": can't create temporary directory");
return Path();
}
return Path(pathname);
#elif defined(HAVE_MKTEMP)
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
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);
#endif
}
void
Path::GetSystemLibraryPaths(std::vector<sys::Path>& Paths) {
#ifdef LTDL_SHLIBPATH_VAR
char* env_var = getenv(LTDL_SHLIBPATH_VAR);
if (env_var != 0) {
getPathList(env_var,Paths);
}
#endif
Paths.push_back(sys::Path("/usr/local/lib/"));
Paths.push_back(sys::Path("/usr/X11R6/lib/"));
Paths.push_back(sys::Path("/usr/lib/"));
Paths.push_back(sys::Path("/lib/"));
}
void
Path::GetBitcodeLibraryPaths(std::vector<sys::Path>& Paths) {
char * env_var = getenv("LLVM_LIB_SEARCH_PATH");
if (env_var != 0) {
getPathList(env_var,Paths);
}
#ifdef LLVM_LIBDIR
{
Path tmpPath;
if (tmpPath.set(LLVM_LIBDIR))
if (tmpPath.canRead())
Paths.push_back(tmpPath);
}
#endif
GetSystemLibraryPaths(Paths);
}
Path
Path::GetUserHomeDirectory() {
const char* home = getenv("HOME");
Path result;
if (home && result.set(home))
return result;
result.set("/");
return result;
}
Path
Path::GetCurrentDirectory() {
char pathname[MAXPATHLEN];
if (!getcwd(pathname, MAXPATHLEN)) {
assert(false && "Could not query current working directory.");
return Path();
}
return Path(pathname);
}
#if defined(__FreeBSD__) || defined (__NetBSD__) || \
defined(__OpenBSD__) || defined(__minix)
static int
test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
const char *dir, const char *bin)
{
struct stat sb;
snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
if (realpath(buf, ret) == NULL)
return (1);
if (stat(buf, &sb) != 0)
return (1);
return (0);
}
static char *
getprogpath(char ret[PATH_MAX], const char *bin)
{
char *pv, *s, *t, buf[PATH_MAX];
if (bin[0] == '/') {
if (test_dir(buf, ret, "/", bin) == 0)
return (ret);
return (NULL);
}
if (strchr(bin, '/') != NULL) {
if (getcwd(buf, PATH_MAX) == NULL)
return (NULL);
if (test_dir(buf, ret, buf, bin) == 0)
return (ret);
return (NULL);
}
if ((pv = getenv("PATH")) == NULL)
return (NULL);
s = pv = strdup(pv);
if (pv == NULL)
return (NULL);
while ((t = strsep(&s, ":")) != NULL) {
if (test_dir(buf, ret, t, bin) == 0) {
free(pv);
return (ret);
}
}
free(pv);
return (NULL);
}
#endif // __FreeBSD__ || __NetBSD__
Path Path::GetMainExecutable(const char *argv0, void *MainAddr) {
#if defined(__APPLE__)
char exe_path[MAXPATHLEN];
uint32_t size = sizeof(exe_path);
if (_NSGetExecutablePath(exe_path, &size) == 0) {
char link_path[MAXPATHLEN];
if (realpath(exe_path, link_path))
return Path(link_path);
}
#elif defined(__FreeBSD__) || defined (__NetBSD__) || \
defined(__OpenBSD__) || defined(__minix)
char exe_path[PATH_MAX];
if (getprogpath(exe_path, argv0) != NULL)
return Path(exe_path);
#elif defined(__linux__) || defined(__CYGWIN__)
char exe_path[MAXPATHLEN];
ssize_t len = readlink("/proc/self/exe", exe_path, sizeof(exe_path));
if (len >= 0)
return Path(StringRef(exe_path, len));
#elif defined(HAVE_DLFCN_H)
Dl_info DLInfo;
int err = dladdr(MainAddr, &DLInfo);
if (err == 0)
return Path();
char link_path[MAXPATHLEN];
if (realpath(DLInfo.dli_fname, link_path))
return Path(link_path);
#else
#error GetMainExecutable is not implemented on this host yet.
#endif
return Path();
}
StringRef Path::getDirname() const {
return getDirnameCharSep(path, "/");
}
StringRef
Path::getBasename() const {
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);
}
StringRef
Path::getSuffix() const {
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();
else
return StringRef(path).substr(dot + 1);
}
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;
}
bool
Path::exists() const {
return 0 == access(path.c_str(), F_OK );
}
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;
}
bool
Path::isSymLink() const {
struct stat buf;
if (0 != lstat(path.c_str(), &buf))
return false;
return S_ISLNK(buf.st_mode);
}
bool
Path::canRead() const {
return 0 == access(path.c_str(), R_OK);
}
bool
Path::canWrite() const {
return 0 == access(path.c_str(), W_OK);
}
bool
Path::isRegularFile() const {
struct stat buf;
if (0 != stat(path.c_str(), &buf))
return false;
if (S_ISREG(buf.st_mode))
return true;
return false;
}
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;
}
StringRef
Path::getLast() const {
size_t pos = path.rfind('/');
if (pos == std::string::npos)
return path;
if (pos == path.length()-1) {
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);
}
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;
}
static bool AddPermissionBits(const Path &File, int bits) {
int mask = umask(0777); umask(mask);
struct stat buf;
if (0 != stat(File.c_str(), &buf))
return false;
if ((chmod(File.c_str(), (buf.st_mode | (bits & ~mask)))) == -1)
return false;
return true;
}
bool Path::makeReadableOnDisk(std::string* ErrMsg) {
if (!AddPermissionBits(*this, 0444))
return MakeErrMsg(ErrMsg, path + ": can't make file readable");
return false;
}
bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
if (!AddPermissionBits(*this, 0222))
return MakeErrMsg(ErrMsg, path + ": can't make file writable");
return false;
}
bool Path::makeExecutableOnDisk(std::string* ErrMsg) {
if (!AddPermissionBits(*this, 0111))
return MakeErrMsg(ErrMsg, path + ": can't make file executable");
return false;
}
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");
std::string dirPath = path;
if (!lastIsSlash(dirPath))
dirPath += '/';
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; return MakeErrMsg(ErrMsg,
aPath.path + ": can't determine file object type");
}
result.insert(aPath);
}
}
closedir(direntries);
return false;
}
bool
Path::set(StringRef a_path) {
if (a_path.empty())
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
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;
}
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;
}
}
return false;
}
static bool createDirectoryHelper(char* beg, char* end, bool create_parents) {
if (access(beg, R_OK | W_OK) == 0)
return false;
if (create_parents) {
char* c = end;
for (; c != beg; --c)
if (*c == '/') {
*c = '\0';
bool x = createDirectoryHelper(beg, c, create_parents);
*c = '/';
if (x)
return true;
break;
}
}
return mkdir(beg, S_IRWXU | S_IRWXG) != 0;
}
bool
Path::createDirectoryOnDisk( bool create_parents, std::string* ErrMsg ) {
std::string pathname(path);
size_t lastchar = path.length() - 1 ;
if (pathname[lastchar] != '/')
++lastchar;
pathname[lastchar] = '\0';
if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents))
return MakeErrMsg(ErrMsg, pathname + ": can't create directory");
return false;
}
bool
Path::createFileOnDisk(std::string* ErrMsg) {
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;
}
bool
Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
if (makeUnique( reuse_current, ErrMsg ))
return true;
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;
}
bool
Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
struct stat buf;
if (0 != stat(path.c_str(), &buf)) {
MakeErrMsg(ErrStr, path + ": can't get status of file");
return true;
}
if (S_ISREG(buf.st_mode)) {
if (unlink(path.c_str()) != 0)
return MakeErrMsg(ErrStr, path + ": can't destroy file");
return false;
}
if (!S_ISDIR(buf.st_mode)) {
if (ErrStr) *ErrStr = "not a file or directory";
return true;
}
if (remove_contents) {
std::string cmd = "/bin/rm -rf " + path;
if (system(cmd.c_str()) != 0) {
MakeErrMsg(ErrStr, path + ": failed to recursively remove directory.");
return true;
}
return false;
}
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;
}
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;
}
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;
}
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");
}
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;
}
bool
Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
bool Exists;
if (reuse_current && (fs::exists(path, Exists) || !Exists))
return false;
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");
else
strcpy(FNBuffer+path.size(), "-XXXXXX");
#if defined(HAVE_MKSTEMP)
int TempFD;
if ((TempFD = mkstemp(FNBuffer)) == -1)
return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
close(TempFD);
path = FNBuffer;
AddPermissionBits (*this, 0666);
#elif defined(HAVE_MKTEMP)
if (mktemp(FNBuffer) == 0)
return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
path = FNBuffer;
#else
static unsigned FCounter = 0;
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());
#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) {
::munmap((void*)BasePtr, FileSize);
}
}