1 files changed, 45 insertions, 0 deletions
diff --git a/api/examples/getvolfile.py b/api/examples/getvolfile.py
new file mode 100755
index 00000000000..3b2c8ab5a15
--- /dev/null
+++ b/api/examples/getvolfile.py
@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+
+from __future__ import print_function
+import ctypes
+import ctypes.util
+
+api = ctypes.CDLL("libgfapi.so")
+api.glfs_get_volfile.argtypes = [ctypes.c_void_p,
+                                 ctypes.c_void_p,
+                                 ctypes.c_ulong]
+api.glfs_get_volfile.restype = ctypes.c_long
+
+
+def get_volfile(host, volume):
+    # This is set to a large value to exercise the "buffer not big enough"
+    # path.  More realistically, you'd just start with a huge buffer.
+    BUF_LEN = 0
+    fs = api.glfs_new(volume)
+    # api.glfs_set_logging(fs,"/dev/stderr",7)
+    api.glfs_set_volfile_server(fs, "tcp", host, 24007)
+    api.glfs_init(fs)
+    vbuf = ctypes.create_string_buffer(BUF_LEN)
+    vlen = api.glfs_get_volfile(fs, vbuf, BUF_LEN)
+    if vlen < 0:
+        vlen = BUF_LEN - vlen
+        vbuf = ctypes.create_string_buffer(vlen)
+        vlen = api.glfs_get_volfile(fs, vbuf, vlen)
+    api.glfs_fini(fs)
+    if vlen <= 0:
+        return vlen
+    return vbuf.value[:vlen]
+
+if __name__ == "__main__":
+    import sys
+
+    try:
+        res = get_volfile(*sys.argv[1:3])
+    except:
+        print("fetching volfile failed (volume not started?)")
+
+    try:
+        for line in res.split('\n'):
+            print(line)
+    except:
+        print("bad return value %s" % res)