Running shell programs from Python
garry at sage.att.com
Mon Apr 24 19:34:32 CEST 2000
Donn Cave wrote:
> The references are mainly UNIX man pages pipe(2), fork(2), fcntl(2)
> (look for dup2), exec(2) and wait(2).
> Basically, the sequence is repeat ( open pipes, fork, close pipes )
> After a fork, the parent and child both have both ends of each pipe
> open, and it's important to close the unused "write" ends so the
> pipe will generate an EOF when its real writer exits.
i've always been curious why this wasn't encapsulated as a single
command in the os module. i use it infrequently enough that i always
need to go look the idiom, or skip it for simpler things. seems like
a single command that returned a process id, and a pair of file
descriptors would have lots of uses.
Garry Hodgson Every night
garry at sage.att.com a child is born
Software Innovation Services is a Holy Night.
AT&T Labs - Sophia Lyon Fahs
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