Add method for checking if a path is a symbolic link.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118367 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 20 insertions, 0 deletions

diff --git a/include/llvm/System/Path.h b/include/llvm/System/Path.h
index 20495287b1..cfeacd236e 100644
--- a/include/llvm/System/Path.h
+++ b/include/llvm/System/Path.h
@@ -373,6 +373,12 @@ namespace sys {
       /// @brief Determins if the path is a directory in the file system.
       bool isDirectory() const;
 
+      /// This function determines if the path name refences an
+      /// existing symbolic link.
+      /// @returns true if the pathname references an existing symlink.
+      /// @brief Determins if the path is a symlink in the file system.
+      bool isSymLink() const;
+
       /// This function determines if the path name references a readable file
       /// or directory in the file system. This function checks for
       /// the existence and readability (by the current program) of the file
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index d5b7542757..5ee3adc4d2 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -434,6 +434,15 @@ Path::isDirectory() const {
 }
 
 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);
 }
diff --git a/lib/System/Win32/Path.inc b/lib/System/Win32/Path.inc
index 2ead80127b..4db7696b49 100644
--- a/lib/System/Win32/Path.inc
+++ b/lib/System/Win32/Path.inc
@@ -351,6 +351,11 @@ Path::isDirectory() const {
 }
 
 bool
+Path::isSymLink() const {
+  return false;
+}
+
+bool
 Path::canRead() const {
   // FIXME: take security attributes into account.
   DWORD attr = GetFileAttributes(path.c_str());