[Scons-dev] Tests fails

[Tom Tanner (BLOOMBERG/ LONDON)]

Joy. I just discovered the contents of /dev/fd on different systems are unpredictable.

AIX - doesn't have it
Solaris - an ls of it returns all *possible* file descriptors

Looks like the test should check if /proc/$$/fd exists, then fallback to /dev/fd 

----- Original Message -----
From: garyo at oberbrunner.com
To: Tom Tanner (BLOOMBERG/ LONDON), scons-dev at scons.org
At: Mar  3 2014 17:10:12

On Mac I see the three usual handles plus a couple of other numeric entries in /dev/fd as directories; I don't understand those but will take a look.


On Mon, Mar 3, 2014 at 11:57 AM, Tom Tanner (BLOOMBERG/ LONDON) <ttanner2 at bloomberg.net> wrote:

Just been hunting around and apparently it's /dev/fd (rather than /proc/xxx/fd) on MacOS, and also apparently /dev/fd will work equally well for linux (although presumably ls -l /dev/fd will actually produce the handles ls has passed to it)

If someone who has MacOS could test that and see if it works and do a pull request.


----- Original Message -----
From: managan1 at llnl.gov
To: Tom Tanner (BLOOMBERG/ LONDON), scons-dev at scons.org
At: Mar  3 2014 16:43:43

    
Hi,

On OSX 10.7.5 I get this:

ls /proc/$$/fd | wc -l
ls: /proc/97956/fd: No such file or directory
       0

So it appears that item 2 below is the culprit.

*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
Rob Managan                             email managan at llnl.gov
LLNL                                             phone: 925-423-0903
P.O. Box 808, L-095                   FAX:   925-422-3389
Livermore, CA  94551-0808


On 3/3/14 1:19 AM, "Tom Tanner (BLOOMBERG/ LONDON)" <ttanner2 at bloomberg.net> wrote:

 
On the OSX one, it looks like you don't have SWIG and RANLIB installed and it's not recognising that it hasn't. I seem to  remember having to install a lot of software on my linux (Ubuntu) box in order to get the tests to run clean. If that's the case, I'd imagine it's a bug really.  

The leaky-handles test is possibly an issue with OSX not behaving quite like other linuxes. In order to detect how many handles are open in a forked subshell, it runs 
ls /proc/$$/fd | wc -l

and expects that to return 3 (stdin, stdout, stderr). If it doesn't, then either
1) python isn't closing files in a child process properly
2) OSX doesn't have a proc/<pid>/fd directory
3) OSX has other standard handles.
4) I've written the test wrong and it doesn't gracefully exit for non posix systems.

I don't have access to an OSX system so I can't really tell, though if it (os.name) returns 'posix' that should work.

Cheers

TT


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-- 
Gary 
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