[Swift-devel] File names in gridftp provider seem to need an extra leading /

[Michael Wilde]

Both when I map files to a physical name starting with gsiftp://, and when I copy files using the swift version of globus-url-copy, I seem to need an extra "/" at the start of the file's pathname.

Here's an example of the issue from within a .swift script:

login1$ swift -config cf -sites.file sites.xml -tc.file tc.data gcat.swift
Swift svn swift-r3702 (swift modified locally) cog-r2924 (cog modified locally)

RunID: 20101110-1426-uouuvdf1
Progress:
Failed to transfer wrapper log from gcat-20101110-1426-uouuvdf1/info/g on localhost
Execution failed:
        Exception in cp:
Arguments: [etc/group, home/wilde/godata/gridoutput.txt]
Host: localhost
Directory: gcat-20101110-1426-uouuvdf1/jobs/g/cp-g3yt5f1k
stderr.txt: 

stdout.txt: 

----

Caused by:
        org.globus.cog.abstraction.impl.file.FileResourceException: Failed to retrieve file information about etc/group
                                ^^^^^^^^^ 
Caused by:
        Server refused performing the request. Custom message: Server refused MLST command (error code 1) [Nested exception message:  Custom message: Unexpected reply: 500-Command failed : globus_gridftp_server_file.c:globus_l_gfs_file_stat:389:
500-System error in stat: No such file or directory
500-A system call failed: No such file or directory
500 End.]
login1$ cat gcat.swift

type file;

app (file o) copy (file i)
{
  cp @i @o;
}

file f1<"gsiftp://pf-grid.unl.edu/etc/group">;
file f2<"gsiftp://gridftp.pads.ci.uchicago.edu/home/wilde/godata/gridoutput.txt">;
f2 = copy(f1);
login1$ 

When I put 2 slashes after the hostname in the URIs above, it works.

A similar issue occurs using Swift globus-url-copy, using the file:// protocol.  Rather then the usual 3 slashes after file:, I need *4*. With 3, it looks (in my test) for etc/group instead of /etc/group. With 4 it works.  With 2, it drops of etc entirely and looks for the file "group".

Are both of these the normal/expected behavior from the Swift gridftp code, or is this an error?

- Mike

-- 
Michael Wilde
Computation Institute, University of Chicago
Mathematics and Computer Science Division
Argonne National Laboratory