wordexp is unsupported

[ddevault]

See the following POSIX pages:

​https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wordexp.h.html

​https://pubs.opengroup.org/onlinepubs/9699919799/functions/wordexp.html

[davidkaroly]

This should be easily adaptable from MUSL, see: ​https://git.musl-libc.org/cgit/musl/tree/src/misc/wordexp.c

However... MUSL wordexp implementation uses pipe2 which is non-POSIX (but it's there in most actual implementations like Linux, FreeBSD, Illumos, MUSL)

So if we want to be really careful then we should implement _pipe2() in libroot and use that from wordexp. Then we can export pipe2() from libbsd. Or just make a shortcut and define pipe2() in libroot - the question is: do we think there might be open source POSIX software that wants to redefine pipe2.

[waddlesplash]

It's worth noting that OpenBSD does not support wordexp at all (probably because there is no "safe" way to implement it; note the musl implementation invokes /bin/sh!) So I'm not entirely sure we should support it either.

[davidkaroly]

yes the backtick handling in musl is not so nice