Merge branch 'master' into cairocanvas

[ardour.git] / libs / pbd / file_utils.cc

diff --git a/libs/pbd/file_utils.cc b/libs/pbd/file_utils.cc
index f323ebcb69715d781f2b7a408f68c70a453d57d9..bb290fa6aaf1ae9ccdeba64e9a3941ed734b0184 100644 (file)
--- a/libs/pbd/file_utils.cc
+++ b/libs/pbd/file_utils.cc
@@ -18,6 +18,10 @@
 */
 
 #include <algorithm>
+#include <vector>
+
+#include <glib.h>
+#include <glib/gstdio.h>
 
 #include <glibmm/fileutils.h>
 #include <glibmm/miscutils.h>
@@ -29,6 +33,7 @@
 #include "pbd/file_utils.h"
 #include "pbd/error.h"
 #include "pbd/pathscanner.h"
+#include "pbd/stl_delete.h"
 
 #include "i18n.h"
 
@@ -162,11 +167,80 @@ copy_files(const std::string & from_path, const std::string & to_dir)
 {
        PathScanner scanner;
        vector<string*>* files = scanner (from_path, accept_all_files, 0, true, false);
-       for (vector<string*>::iterator i = files->begin(); i != files->end(); ++i) {
-               std::string from = Glib::build_filename (from_path, **i);
-               std::string to = Glib::build_filename (to_dir, **i);
-               copy_file (from, to);
+
+       if (files) {
+               for (vector<string*>::iterator i = files->begin(); i != files->end(); ++i) {
+                       std::string from = Glib::build_filename (from_path, **i);
+                       std::string to = Glib::build_filename (to_dir, **i);
+                       copy_file (from, to);
+               }
+               vector_delete (files);
+       }
+}
+
+std::string
+get_absolute_path (const std::string & p)
+{
+       Glib::RefPtr<Gio::File> f = Gio::File::create_for_path (p);
+       return f->get_path ();
+}
+
+bool
+equivalent_paths (const std::string& a, const std::string& b)
+{
+       struct stat bA;
+       int const rA = g_stat (a.c_str(), &bA);
+       struct stat bB;
+       int const rB = g_stat (b.c_str(), &bB);
+
+       return (rA == 0 && rB == 0 && bA.st_dev == bB.st_dev && bA.st_ino == bB.st_ino);
+}
+
+bool
+path_is_within (std::string const & haystack, std::string needle)
+{
+       while (1) {
+               if (equivalent_paths (haystack, needle)) {
+                       return true;
+               }
+
+               needle = Glib::path_get_dirname (needle);
+               if (needle == "." || needle == "/") {
+                       break;
+               }
        }
+
+       return false;
+}
+
+bool
+exists_and_writable (const std::string & p)
+{
+       /* writable() really reflects the whole folder, but if for any
+          reason the session state file can't be written to, still
+          make us unwritable.
+       */
+
+       struct stat statbuf;
+
+       if (g_stat (p.c_str(), &statbuf) != 0) {
+               /* doesn't exist - not writable */
+               return false;
+       } else {
+               if (!(statbuf.st_mode & S_IWUSR)) {
+                       /* exists and is not writable */
+                       return false;
+               }
+               /* filesystem may be mounted read-only, so even though file
+                * permissions permit access, the mount status does not.
+                * access(2) seems like the best test for this.
+                */
+               if (g_access (p.c_str(), W_OK) != 0) {
+                       return false;
+               }
+       }
+
+       return true;
 }
 
 } // namespace PBD