Re: spawn hangs for non-Cygwin programs

[Christopher Faylor <cgf at redhat dot com>]

On Wed, Feb 28, 2001 at 06:47:32PM -0500, Christopher Faylor wrote:
>On Wed, Feb 28, 2001 at 01:24:10PM -0800, Bob Wilson wrote:
>>I have a Cygwin program that contains the following call to invoke a
>>child process:
>>
>>    pid = spawnvp((int)_P_NOWAIT, argv[0], argv);
>>
>>Sometime between Cygwin 1.1.4 and 1.1.8 it seems to have stopped
>>working.  If the child is another Cygwin program, then everything is
>>fine.  If the child was compiled with -mno-cygwin, however, the spawnvp
>>call never returns (as if I hadn't specified _P_NOWAIT).
>>
>>Is this supposed to work?
>
>Yes.

Actually, on reflection, this is working as designed, unfortunately.  spawn
relies on some synchronization with the cygwin process now and if the process
is not a cygwin process, the synchronization never happens.  So, spawn
waits for the program to terminate.

cgf

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