From 08903414e3546bc2c76bef73b2337ccf79886530 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 18 Jun 2015 14:41:44 +0200
Subject: Move path and filesystem from build2 to libbutl

---
 butl/filesystem.cxx | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 butl/filesystem.cxx

(limited to 'butl/filesystem.cxx')

diff --git a/butl/filesystem.cxx b/butl/filesystem.cxx
new file mode 100644
index 0000000..230bc8e
--- /dev/null
+++ b/butl/filesystem.cxx
@@ -0,0 +1,101 @@
+// file      : butl/filesystem.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <butl/filesystem>
+
+#include <unistd.h>    // rmdir(), unlink()
+#include <sys/types.h> // stat
+#include <sys/stat.h>  // stat, lstat(), S_IS*, mkdir()
+
+#include <system_error>
+
+using namespace std;
+
+namespace butl
+{
+  bool
+  dir_exists (const path& p)
+  {
+    struct stat s;
+    if (::lstat (p.string ().c_str (), &s) != 0)
+    {
+      if (errno == ENOENT || errno == ENOTDIR)
+        return false;
+      else
+        throw system_error (errno, system_category ());
+    }
+
+    return S_ISDIR (s.st_mode);
+  }
+
+  bool
+  file_exists (const path& p)
+  {
+    struct stat s;
+    if (::lstat (p.string ().c_str (), &s) != 0)
+    {
+      if (errno == ENOENT || errno == ENOTDIR)
+        return false;
+      else
+        throw system_error (errno, system_category ());
+    }
+
+    return S_ISREG (s.st_mode);
+  }
+
+  mkdir_status
+  try_mkdir (const path& p, mode_t m)
+  {
+    mkdir_status r (mkdir_status::success);
+
+    if (::mkdir (p.string ().c_str (), m) != 0)
+    {
+      int e (errno);
+
+      // EEXIST means the path already exists but not necessarily as
+      // a directory.
+      //
+      if (e == EEXIST && dir_exists (p))
+        return mkdir_status::already_exists;
+      else
+        throw system_error (e, system_category ());
+    }
+
+    return r;
+  }
+
+  rmdir_status
+  try_rmdir (const path& p)
+  {
+    rmdir_status r (rmdir_status::success);
+
+    if (::rmdir (p.string ().c_str ()) != 0)
+    {
+      if (errno == ENOENT)
+        r = rmdir_status::not_exist;
+      else if (errno == ENOTEMPTY || errno == EEXIST)
+        r = rmdir_status::not_empty;
+      else
+        throw system_error (errno, system_category ());
+    }
+
+    return r;
+  }
+
+  rmfile_status
+  try_rmfile (const path& p)
+  {
+    rmfile_status r (rmfile_status::success);
+
+    if (::unlink (p.string ().c_str ()) != 0)
+    {
+      if (errno == ENOENT || errno == ENOTDIR)
+        r = rmfile_status::not_exist;
+      else
+        throw system_error (errno, system_category ());
+    }
+
+    return r;
+  }
+}
-- 
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