//=== is guaranteed to work on *all* UNIX variants.
//===----------------------------------------------------------------------===//
-#include "llvm/Config/alloca.h"
#include "Unix.h"
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#include <dlfcn.h>
#endif
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
+
// Put in a hack for Cygwin which falsely reports that the mkdtemp function
// is available when it is not.
#ifdef __CYGWIN__
namespace llvm {
using namespace sys;
-extern const char sys::PathSeparator = ':';
+const char sys::PathSeparator = ':';
+
+StringRef Path::GetEXESuffix() {
+ return "";
+}
-Path::Path(const std::string& p)
+Path::Path(StringRef p)
: path(p) {}
Path::Path(const char *StrStart, unsigned StrLen)
: path(StrStart, StrLen) {}
Path&
-Path::operator=(const std::string &that) {
- path = that;
+Path::operator=(StringRef that) {
+ path.assign(that.data(), that.size());
return *this;
}
// Check some obvious things
if (path.empty())
return false;
- else if (path.length() >= MAXPATHLEN)
- return false;
+ return path.length() < MAXPATHLEN;
+}
- // Check that the characters are ascii chars
- size_t len = path.length();
- unsigned i = 0;
- while (i < len && isascii(path[i]))
- ++i;
- return i >= len;
+bool
+Path::isAbsolute(const char *NameStart, unsigned NameLen) {
+ assert(NameStart);
+ if (NameLen == 0)
+ return false;
+ return NameStart[0] == '/';
}
bool
return false;
return path[0] == '/';
}
+
+void Path::makeAbsolute() {
+ if (isAbsolute())
+ return;
+
+ Path CWD = Path::GetCurrentDirectory();
+ assert(CWD.isAbsolute() && "GetCurrentDirectory returned relative path!");
+
+ CWD.appendComponent(path);
+
+ path = CWD.str();
+}
+
Path
Path::GetRootDirectory() {
Path result;
char pathname[MAXPATHLEN];
if (!getcwd(pathname,MAXPATHLEN)) {
assert (false && "Could not query current working directory.");
- return Path("");
+ return Path();
}
return Path(pathname);
}
+#if defined(__FreeBSD__) || defined (__NetBSD__) || 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];
+
+ /* First approach: absolute path. */
+ if (bin[0] == '/') {
+ if (test_dir(buf, ret, "/", bin) == 0)
+ return (ret);
+ return (NULL);
+ }
+
+ /* Second approach: relative path. */
+ if (strchr(bin, '/') != NULL) {
+ if (getcwd(buf, PATH_MAX) == NULL)
+ return (NULL);
+ if (test_dir(buf, ret, buf, bin) == 0)
+ return (ret);
+ return (NULL);
+ }
+
+ /* Third approach: $PATH */
+ 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__
+
/// 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) {
-#if defined(__linux__) || defined(__CYGWIN__)
+#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
+ // binaries with symbols.
char exe_path[MAXPATHLEN];
- ssize_t len = readlink("/proc/self/exe", exe_path, sizeof(exe_path));
- if (len > 0 && len < MAXPATHLEN - 1) {
- exe_path[len] = '\0';
- return Path(std::string(exe_path));
+ uint32_t size = sizeof(exe_path);
+ if (_NSGetExecutablePath(exe_path, &size) == 0) {
+ char link_path[MAXPATHLEN];
+ if (realpath(exe_path, link_path))
+ return Path(std::string(link_path));
}
+#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__minix)
+ char exe_path[PATH_MAX];
+
+ if (getprogpath(exe_path, argv0) != NULL)
+ return Path(std::string(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(std::string(exe_path, len));
#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();
-
+
// If the filename is a symlink, we need to resolve and return the location of
// the actual executable.
char link_path[MAXPATHLEN];
- return Path(std::string(realpath(DLInfo.dli_fname, link_path)));
+ if (realpath(DLInfo.dli_fname, link_path))
+ return Path(std::string(link_path));
+#else
+#error GetMainExecutable is not implemented on this host yet.
#endif
return Path();
}
-std::string Path::getDirname() const {
- return getDirnameCharSep(path, '/');
+StringRef Path::getDirname() const {
+ return getDirnameCharSep(path, "/");
}
-std::string
+StringRef
Path::getBasename() const {
// Find the last slash
std::string::size_type slash = path.rfind('/');
std::string::size_type dot = path.rfind('.');
if (dot == std::string::npos || dot < slash)
- return path.substr(slash);
+ return StringRef(path).substr(slash);
else
- return path.substr(slash, dot - slash);
+ return StringRef(path).substr(slash, dot - slash);
}
-std::string
+StringRef
Path::getSuffix() const {
// Find the last slash
std::string::size_type slash = path.rfind('/');
std::string::size_type dot = path.rfind('.');
if (dot == std::string::npos || dot < slash)
- return std::string();
+ return StringRef();
else
- return path.substr(dot + 1);
+ return StringRef(path).substr(dot + 1);
}
-bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
+bool Path::getMagicNumber(std::string &Magic, unsigned len) const {
assert(len < 1024 && "Request for magic string too long");
- char* buf = (char*) alloca(1 + len);
+ char Buf[1025];
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
- ssize_t bytes_read = ::read(fd, buf, len);
+ ssize_t bytes_read = ::read(fd, Buf, len);
::close(fd);
- if (ssize_t(len) != bytes_read) {
- Magic.clear();
+ if (ssize_t(len) != bytes_read)
return false;
- }
- Magic.assign(buf,len);
+ Magic.assign(Buf, len);
return true;
}
struct stat buf;
if (0 != stat(path.c_str(), &buf))
return false;
- return buf.st_mode & S_IFDIR ? true : false;
+ return ((buf.st_mode & S_IFMT) == S_IFDIR) ? true : false;
}
bool
Path::canRead() const {
- return 0 == access(path.c_str(), F_OK | R_OK );
+ return 0 == access(path.c_str(), R_OK);
}
bool
Path::canWrite() const {
- return 0 == access(path.c_str(), F_OK | W_OK );
+ return 0 == access(path.c_str(), W_OK);
+}
+
+bool
+Path::isRegularFile() 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))
+ return false;
+
+ if (S_ISREG(buf.st_mode))
+ return true;
+
+ return false;
}
bool
return true;
}
-std::string
+StringRef
Path::getLast() const {
// Find the last slash
size_t pos = path.rfind('/');
// Find the second to last slash
size_t pos2 = path.rfind('/', pos-1);
if (pos2 == std::string::npos)
- return path.substr(0,pos);
+ return StringRef(path).substr(0,pos);
else
- return path.substr(pos2+1,pos-pos2-1);
+ return StringRef(path).substr(pos2+1,pos-pos2-1);
}
// Return everything after the last slash
- return path.substr(pos+1);
+ return StringRef(path).substr(pos+1);
}
const FileStatus *
// Get the file's current mode.
struct stat buf;
- if (0 != stat(File.toString().c_str(), &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.
}
bool
-Path::set(const std::string& a_path) {
+Path::set(StringRef a_path) {
if (a_path.empty())
return false;
std::string save(path);
}
bool
-Path::appendComponent(const std::string& name) {
+Path::appendComponent(StringRef name) {
if (name.empty())
return false;
std::string save(path);
}
bool
-Path::appendSuffix(const std::string& suffix) {
+Path::appendSuffix(StringRef suffix) {
std::string save(path);
path.append(".");
path.append(suffix);
static bool createDirectoryHelper(char* beg, char* end, bool create_parents) {
- if (access(beg, F_OK | R_OK | W_OK) == 0)
+ if (access(beg, R_OK | W_OK) == 0)
return false;
if (create_parents) {
bool
Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
- // Get the status so we can determin if its a file or directory
+ // 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");
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.toString() + "' ");
+ newName.str() + "'");
return false;
}
int outFile = -1;
inFile = ::open(Src.c_str(), O_RDONLY);
if (inFile == -1)
- return MakeErrMsg(ErrMsg, Src.toString() +
+ 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.toString() +
+ return MakeErrMsg(ErrMsg, Dest.str() +
": can't create destination file for copy");
}
if (errno != EINTR && errno != EAGAIN) {
::close(inFile);
::close(outFile);
- return MakeErrMsg(ErrMsg, Src.toString()+": can't read source file: ");
+ return MakeErrMsg(ErrMsg, Src.str()+": can't read source file");
}
} else {
char *BufPtr = Buffer;
if (errno != EINTR && errno != EAGAIN) {
::close(inFile);
::close(outFile);
- return MakeErrMsg(ErrMsg, Dest.toString() +
- ": can't write destination file: ");
+ return MakeErrMsg(ErrMsg, Dest.str() +
+ ": can't write destination file");
}
} else {
Amt -= AmtWritten;
// Append an XXXXXX pattern to the end of the file for use with mkstemp,
// mktemp or our own implementation.
- char *FNBuffer = (char*) alloca(path.size()+8);
+ // 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());
if (isDirectory())
strcpy(FNBuffer+path.size(), "/XXXXXX");
#else
// Okay, looks like we have to do it all by our lonesome.
static unsigned FCounter = 0;
- unsigned offset = path.size() + 1;
- while ( FCounter < 999999 && exists()) {
- sprintf(FNBuffer+offset,"%06u",++FCounter);
+ // 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;
- }
- if (FCounter > 999999)
- return MakeErrMsg(ErrMsg,
- path + ": can't make unique filename: too many files");
+ } while (exists());
+ // POSSIBLE SECURITY BUG: An attacker can easily guess the name and exploit
+ // LLVM.
#endif
return false;
}
}
} // end llvm namespace
-
projects / oota-llvm.git / blobdiff