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web commit by martin: Add gsoco project to make system(3) and popen(3) use posix_spawn(3) internally

[[!template id=project

title="Make system(3) and popen(3) use posix_spawn(3) internally"

contact="""
[tech-userland](mailto:tech-userland@NetBSD.org)
"""

mentors="""
[Martin Husemann](mailto:martin@NetBSD.org)
"""

category="userland"
difficulty="easy"

description="""
The library functions popen(3) and system(3) are used to create a new shell
process and (in case of popen(3) set up IPC channels to the new process).

Currently they are implemented using fork(2), execve(2) and do a bit of
astonishing complex internal bookkeeping.

It should be possible to simplify both implementations using
posix_spawn(3) and associated helper functions.
"""
]]

[[!tag gsoc]]