//=== is guaranteed to work on *all* UNIX variants.
//===----------------------------------------------------------------------===//
-#include <llvm/Config/config.h>
-#include <llvm/Config/alloca.h>
+#include "llvm/Config/alloca.h"
#include "Unix.h"
+#if HAVE_SYS_STAT_H
#include <sys/stat.h>
+#endif
+#if HAVE_FCNTL_H
#include <fcntl.h>
+#endif
+#if HAVE_UTIME_H
#include <utime.h>
-#include <dirent.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
+
namespace llvm {
using namespace sys;
-Path::Path(const std::string& unverified_path)
- : path(unverified_path)
-{
+Path::Path(const std::string& unverified_path) : path(unverified_path) {
if (unverified_path.empty())
return;
if (this->isValid())
ThrowErrno(unverified_path + ": path is not valid");
}
+bool
+Path::isValid() const {
+ if (path.empty())
+ return false;
+ else if (path.length() >= MAXPATHLEN)
+ return false;
+#if defined(HAVE_REALPATH)
+ char pathname[MAXPATHLEN];
+ if (0 == realpath(path.c_str(), pathname))
+ if (errno != EACCES && errno != EIO && errno != ENOENT && errno != ENOTDIR)
+ return false;
+#endif
+ return true;
+}
+
Path
Path::GetRootDirectory() {
Path result;
return result;
}
+Path
+Path::GetTemporaryDirectory() {
+#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[MAXPATHLEN];
+ strcpy(pathname,"/tmp/llvm_XXXXXX");
+ if (0 == mkdtemp(pathname))
+ ThrowErrno(std::string(pathname) + ": Can't create temporary directory");
+ Path result;
+ result.setDirectory(pathname);
+ assert(result.isValid() && "mkdtemp didn't create a valid pathname!");
+ return result;
+#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[MAXPATHLEN];
+ strcpy(pathname, "/tmp/llvm_XXXXXX");
+ int fd = 0;
+ if (-1 == (fd = mkstemp(pathname)))
+ ThrowErrno(std::string(pathname) + ": Can't create temporary directory");
+ ::close(fd);
+ ::unlink(pathname); // start race condition, ignore errors
+ if (-1 == ::mkdir(pathname, S_IRWXU)) // end race condition
+ ThrowErrno(std::string(pathname) + ": Can't create temporary directory");
+ Path result;
+ result.setDirectory(pathname);
+ assert(result.isValid() && "mkstemp didn't create a valid pathname!");
+ return result;
+#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[MAXPATHLEN];
+ strcpy(pathname, "/tmp/llvm_XXXXXX");
+ char *TmpName = ::mktemp(pathname);
+ if (TmpName == 0)
+ throw std::string(TmpName) + ": Can't create unique directory name";
+ if (-1 == ::mkdir(TmpName, S_IRWXU))
+ ThrowErrno(std::string(TmpName) + ": Can't create temporary directory");
+ Path result;
+ result.setDirectory(TmpName);
+ assert(result.isValid() && "mktemp didn't create a valid pathname!");
+ return result;
+#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))
+ ThrowErrno(std::string(pathname) + ": Can't create temporary directory");
+ Path result;
+ result.setDirectory(pathname);
+ assert(result.isValid() && "mkstemp didn't create a valid pathname!");
+ return result;
+#endif
+}
+
static void getPathList(const char*path, std::vector<sys::Path>& Paths) {
const char* at = path;
const char* delim = strchr(at, ':');
Paths.push_back(tmpPath);
}
+
void
Path::GetSystemLibraryPaths(std::vector<sys::Path>& Paths) {
#ifdef LTDL_SHLIBPATH_VAR
if (env_var != 0) {
getPathList(env_var,Paths);
}
-#ifdef LLVMGCCDIR
- {
- Path tmpPath(std::string(LLVMGCCDIR) + "lib/");
- if (tmpPath.readable())
- Paths.push_back(tmpPath);
- }
-#endif
#ifdef LLVM_LIBDIR
{
Path tmpPath;
}
bool
-Path::destroyDirectory(bool remove_contents) {
+Path::destroyDirectory(bool remove_contents) const {
// Make sure we're dealing with a directory
if (!isDirectory()) return false;
}
bool
-Path::destroyFile() {
+Path::destroyFile() const {
if (!isFile()) return false;
if (0 != unlink(path.c_str()))
ThrowErrno(path + ": Can't destroy file");
}
void
-CopyFile(const sys::Path &Dest, const sys::Path &Src) {
+sys::CopyFile(const sys::Path &Dest, const sys::Path &Src) {
int inFile = -1;
int outFile = -1;
try {
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