//===- llvm/System/Unix/Path.cpp - Unix Path Implementation -----*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
// This file implements the Unix specific portion of the Path class.
//=== is guaranteed to work on *all* UNIX variants.
//===----------------------------------------------------------------------===//
-#include "llvm/Config/alloca.h"
+#include "llvm/ADT/SmallVector.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__
extern const char sys::PathSeparator = ':';
-bool
+Path::Path(const std::string& p)
+ : path(p) {}
+
+Path::Path(const char *StrStart, unsigned StrLen)
+ : path(StrStart, StrLen) {}
+
+Path&
+Path::operator=(const std::string &that) {
+ path = that;
+ return *this;
+}
+
+bool
Path::isValid() const {
// Check some obvious things
- if (path.empty())
- return false;
- else if (path.length() >= MAXPATHLEN)
+ if (path.empty())
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
+bool
Path::isAbsolute() const {
if (path.empty())
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;
}
Path
-Path::GetTemporaryDirectory(std::string* ErrMsg ) {
+Path::GetTemporaryDirectory(std::string *ErrMsg) {
#if defined(HAVE_MKDTEMP)
- // The best way is with mkdtemp but that's not available on many systems,
+ // 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[MAXPATHLEN];
strcpy(pathname,"/tmp/llvm_XXXXXX");
if (0 == mkdtemp(pathname)) {
- MakeErrMsg(ErrMsg,
+ MakeErrMsg(ErrMsg,
std::string(pathname) + ": can't create temporary directory");
return Path();
}
// 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.
+ // the time it is re-created as a directoy.
char pathname[MAXPATHLEN];
strcpy(pathname, "/tmp/llvm_XXXXXX");
int fd = 0;
if (-1 == (fd = mkstemp(pathname))) {
- MakeErrMsg(ErrMsg,
+ 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,
+ MakeErrMsg(ErrMsg,
std::string(pathname) + ": can't create temporary directory");
return Path();
}
strcpy(pathname, "/tmp/llvm_XXXXXX");
char *TmpName = ::mktemp(pathname);
if (TmpName == 0) {
- MakeErrMsg(ErrMsg,
+ MakeErrMsg(ErrMsg,
std::string(TmpName) + ": can't create unique directory name");
return Path();
}
if (-1 == ::mkdir(TmpName, S_IRWXU)) {
- MakeErrMsg(ErrMsg,
+ MakeErrMsg(ErrMsg,
std::string(TmpName) + ": can't create temporary directory");
return Path();
}
// 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
+ // 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
sprintf(pathname, "/tmp/llvm_%010u", unsigned(num));
} while ( 0 == access(pathname, F_OK ) );
if (-1 == ::mkdir(pathname, S_IRWXU)) {
- MakeErrMsg(ErrMsg,
+ MakeErrMsg(ErrMsg,
std::string(pathname) + ": can't create temporary directory");
return Path();
}
#endif
}
-void
+void
Path::GetSystemLibraryPaths(std::vector<sys::Path>& Paths) {
#ifdef LTDL_SHLIBPATH_VAR
char* env_var = getenv(LTDL_SHLIBPATH_VAR);
GetSystemLibraryPaths(Paths);
}
-Path
+Path
Path::GetLLVMDefaultConfigDir() {
return Path("/etc/llvm/");
}
assert (false && "Could not query current working directory.");
return Path("");
}
-
+
return Path(pathname);
}
+#ifdef __FreeBSD__
+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
+
/// 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(__CYGWIN__)
- char exe_link[64];
- snprintf(exe_link, sizeof(exe_link), "/proc/%d/exe", getpid());
+#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(exe_link, 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];
+ return Path(std::string(realpath(exe_path, link_path)));
}
+#elif defined(__FreeBSD__)
+ 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(std::string(DLInfo.dli_fname));
+ 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)));
#endif
return Path();
}
return path.substr(slash, dot - slash);
}
+std::string
+Path::getSuffix() 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 std::string();
+ else
+ return path.substr(dot + 1);
+}
+
bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
assert(len < 1024 && "Request for magic string too long");
- char* buf = (char*) alloca(1 + len);
+ SmallVector<char, 128> Buf;
+ Buf.resize(1 + len);
+ char* buf = Buf.data();
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return 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
return true;
}
-std::string
+std::string
Path::getLast() const {
// Find the last slash
size_t pos = path.rfind('/');
// 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::makeReadableOnDisk(std::string* ErrMsg) {
- if (!AddPermissionBits(*this, 0444))
+ if (!AddPermissionBits(*this, 0444))
return MakeErrMsg(ErrMsg, path + ": can't make file readable");
return false;
}
if (0 != lstat(aPath.path.c_str(), &st)) {
if (S_ISLNK(st.st_mode))
continue; // dangling symlink -- ignore
- return MakeErrMsg(ErrMsg,
+ return MakeErrMsg(ErrMsg,
aPath.path + ": can't determine file object type");
}
result.insert(aPath);
}
}
-
+
closedir(direntries);
return false;
}
}
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) {
-
+
char* c = end;
-
+
for (; c != beg; --c)
if (*c == '/') {
-
+
// Recurse to handling the parent directory.
- *c = '\0';
+ *c = '\0';
bool x = createDirectoryHelper(beg, c, create_parents);
*c = '/';
-
+
// Return if we encountered an error.
if (x)
return true;
-
+
break;
}
- }
-
+ }
+
return mkdir(beg, S_IRWXU | S_IRWXG) != 0;
}
// Null-terminate the last component
size_t lastchar = path.length() - 1 ;
-
+
if (pathname[lastchar] != '/')
++lastchar;
-
+
pathname[lastchar] = 0;
-
+
if (createDirectoryHelper(pathname, pathname+lastchar, create_parents))
- return MakeErrMsg(ErrMsg,
+ return MakeErrMsg(ErrMsg,
std::string(pathname) + ": can't create directory");
-
+
return false;
}
// create the file
int fd = ::open(path.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666);
- if (fd < 0)
+ if (fd < 0)
return MakeErrMsg(ErrMsg, path + ": can't create temporary file");
::close(fd);
return false;
return true;
}
- // 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.
+ // 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;
}
-
+
if (!S_ISDIR(buf.st_mode)) {
if (ErrStr) *ErrStr = "not a file or directory";
return true;
if (remove_contents) {
// Recursively descend the directory to remove its contents.
std::string cmd = "/bin/rm -rf " + path;
- system(cmd.c_str());
+ if (system(cmd.c_str()) != 0) {
+ MakeErrMsg(ErrStr, path + ": failed to recursively remove directory.");
+ return true;
+ }
return false;
}
char pathname[MAXPATHLEN];
path.copy(pathname, MAXPATHLEN);
size_t lastchar = path.length() - 1;
- if (pathname[lastchar] == '/')
+ if (pathname[lastchar] == '/')
pathname[lastchar] = 0;
else
pathname[lastchar+1] = 0;
-
+
if (rmdir(pathname) != 0)
- return MakeErrMsg(ErrStr,
+ return MakeErrMsg(ErrStr,
std::string(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.toString() + "' ");
+ return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
+ newName.str() + "'");
return false;
}
-bool
+bool
Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrStr) const {
struct utimbuf utb;
utb.actime = si.modTime.toPosixTime();
return false;
}
-bool
+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.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;
return false;
}
-bool
+bool
Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
if (reuse_current && !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,
+ // 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);
- path.copy(FNBuffer,path.size());
- strcpy(FNBuffer+path.size(), "-XXXXXX");
+ SmallVector<char, 128> Buf;
+ Buf.resize(path.size()+8);
+ char *FNBuffer = Buf.data();
+ path.copy(FNBuffer,path.size());
+ if (isDirectory())
+ strcpy(FNBuffer+path.size(), "/XXXXXX");
+ else
+ strcpy(FNBuffer+path.size(), "-XXXXXX");
#if defined(HAVE_MKSTEMP)
int TempFD;
path = FNBuffer;
}
if (FCounter > 999999)
- return MakeErrMsg(ErrMsg,
+ return MakeErrMsg(ErrMsg,
path + ": can't make unique filename: too many files");
#endif
return false;
}
} // end llvm namespace
-
projects / oota-llvm.git / blobdiff