libglusterfsclient: implement glusterfs_getcwd.

Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 369 (Samba does not work with booster.)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=369

2 files changed, 78 insertions, 0 deletions

diff --git a/libglusterfsclient/src/libglusterfsclient.c b/libglusterfsclient/src/libglusterfsclient.c
index 58803e8933b..dcfda772e11 100755
--- a/libglusterfsclient/src/libglusterfsclient.c
+++ b/libglusterfsclient/src/libglusterfsclient.c
@@ -7843,6 +7843,70 @@ out:
 }
 
 
+char *
+glusterfs_getcwd (char *buf, size_t size)
+{
+        char              *res      = NULL;
+        size_t             len      = 0; 
+        loc_t              loc      = {0, };
+        glusterfs_handle_t handle   = NULL;
+        char               vpath[PATH_MAX];
+        int32_t            op_ret   = 0; 
+
+        pthread_mutex_lock (&cwdlock);
+        {
+                if (!cwd_inited) {
+                        errno = ENODEV;
+                        goto unlock;
+                }
+
+                if (buf == NULL) {
+                        buf = CALLOC (1, len);
+                        if (buf == NULL) {
+                                gf_log (LIBGF_XL_NAME, GF_LOG_ERROR,
+                                        "out of memory");
+                                goto unlock;
+                        }
+                } else {
+                        if (size == 0) {
+                                errno = EINVAL;
+                                goto unlock;
+                        }
+
+                        if (len > size) {
+                                errno = ERANGE;
+                                goto unlock;
+                        }
+                }
+
+                strcpy (buf, cwd);
+                res = buf; 
+        }
+unlock:
+        pthread_mutex_unlock (&cwdlock);
+
+        if (res != NULL) {
+                handle = libgf_resolved_path_handle (res, vpath);
+
+                if (handle != NULL)  {
+                        loc.path = strdup (vpath);
+                        if (loc.path == NULL) {
+                                gf_log (LIBGF_XL_NAME, GF_LOG_ERROR,
+                                        "strdup failed");
+                        } else {
+                                op_ret = libgf_client_path_lookup (&loc, handle,
+                                                                   0);
+                                if (op_ret == -1) {
+                                        res = NULL;
+                                }
+                        }
+                }
+        }
+
+        return res;
+}
+
+
 static struct xlator_fops libgf_client_fops = {
 };
 
diff --git a/libglusterfsclient/src/libglusterfsclient.h b/libglusterfsclient/src/libglusterfsclient.h
index 74575fa61a7..1684381c9bb 100755
--- a/libglusterfsclient/src/libglusterfsclient.h
+++ b/libglusterfsclient/src/libglusterfsclient.h
@@ -1325,6 +1325,20 @@ glusterfs_chdir (const char *path);
 int
 glusterfs_fchdir (glusterfs_file_t fd);
 
+/* copies the current working directory into @buf if it is big enough
+ *
+ * @buf: buffer to copy into it. If @buf is NULL, a buffer will be allocated.
+ *       The size of the buffer will be @size if it is not zero, otherwise the
+ *       size will be big enough to hold the current working directory.
+ * @size: size of the buffer.
+ *
+ * Returns the pointer to buffer holding current working directory on success
+ * and NULL on failure.
+ */
+
+char *
+glusterfs_getcwd (char *buf, size_t size);
+
 /* FIXME: review the need for these apis */
 /* added for log related initialization in booster fork implementation */
 void