On 10/30/06, David Korn <dgk at research.att.com> wrote:
>
> ksh93 needs to call whatever is the fastest method for creating a process.
> To do this, ksh93 calls a wrapper function named spawnveg() that is in the
> ast library. This function combines fork/exec plus specifies the process
> group to join or whether to create a new group or not.
>
> This function uses the fastest method available. The iffe (IF Feature Exists)
> script, which runs at compile time, compares the performance of vfork()
> and posix_spawn() if both exists and chooses the fastest.
>
> Since ksh93 doesn't use threads. I am not aware of any reason
> that vfork() would not be reliable.
Didn't Roland say he's working on a thread safe version of libshell?
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_ Felix Schulte
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