adding new apis requested from gluster-swift proj

This patch adds new functions that are used in gluster-swift.
These functions are: dup, lseek, getatime, getctime, getmtime

Change-Id: I09036f7e393a89e09913f7f6de173e1eca8dca95
Signed-off-by: Thiago da Silva <thiago@redhat.com>

1 files changed, 46 insertions, 2 deletions

diff --git a/glusterfs/gfapi.py b/glusterfs/gfapi.py
index 6ca2ad7..80418a1 100644
--- a/glusterfs/gfapi.py
+++ b/glusterfs/gfapi.py
@@ -87,8 +87,9 @@ api.glfs_fstat.argtypes = [ctypes.c_void_p, ctypes.POINTER(Stat)]
 
 class File(object):
 
-    def __init__(self, fd):
+    def __init__(self, fd, path=None):
         self.fd = fd
+        self.originalpath = path
 
     def __enter__(self):
         if self.fd is None:
@@ -115,6 +116,13 @@ class File(object):
             raise OSError(err, os.strerror(err))
         return ret
 
+    def dup(self):
+        dupfd = api.glfs_dup(self.fd)
+        if not dupfd:
+            err = ctypes.get_errno()
+            raise OSError(err, os.strerror(err))
+        return File(dupfd, self.originalpath)
+
     def fallocate(self, mode, offset, len):
         ret = api.glfs_fallocate(self.fd, mode, offset, len)
         if ret < 0:
@@ -166,6 +174,21 @@ class File(object):
             raise OSError(err, os.strerror(err))
         return ret
 
+    def lseek(self, pos, how):
+        """
+        Set the read/write offset position of this file.
+        The new position is defined by 'pos' relative to 'how'
+
+        :param pos: sets new offset position according to 'how'
+        :param how: SEEK_SET, sets offset position 'pos' bytes relative to
+                    beginning of file, SEEK_CUR, the position is set relative
+                    to the current position and SEEK_END sets the position
+                    relative to the end of the file.
+        :returns: the new offset position
+
+        """
+        return api.glfs_lseek(self.fd, pos, how)
+
     def read(self, buflen, flags=0):
         rbuf = ctypes.create_string_buffer(buflen)
         ret = api.glfs_read(self.fd, rbuf, buflen, flags)
@@ -263,6 +286,27 @@ class Volume(object):
             return False
         return True
 
+    def getatime(self, path):
+        """
+        Returns the last access time as reported by stat
+        """
+        return self.stat(path).st_atime
+
+    def getctime(self, path):
+        """
+        Returns the time when changes were made to the path as reported by stat
+        This time is updated when changes are made to the file or dir's inode
+        or the contents of the file
+        """
+        return self.stat(path).st_ctime
+
+    def getmtime(self, path):
+        """
+        Returns the time when changes were made to the content of the path
+        as reported by stat
+        """
+        return self.stat(path).st_mtime
+
     def getsize(self, filename):
         """
         Return the size of a file, reported by stat()
@@ -388,7 +432,7 @@ class Volume(object):
             err = ctypes.get_errno()
             raise OSError(err, os.strerror(err))
 
-        return File(fd)
+        return File(fd, path)
 
     def opendir(self, path):
         fd = api.glfs_opendir(self.fs, path)