libc: add MS_NOSYMFOLLOW support #1471
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Linux platforms that are forced to use the libc backend cannot access MS_NOSYMFOLLOW. The upstream libc crate doesn't expose MS_NOSYMFOLLOW, but on Linux we can just remap linux-raw-sys. FreeBSD also has nosymfollow support in the form of MNT_NOSYMFOLLOW, but rustix::mount is not provided for FreeBSD. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
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Linux platforms that are forced to use the libc backend cannot access
MS_NOSYMFOLLOW. The upstream libc crate doesn't expose MS_NOSYMFOLLOW,
but on Linux we can just remap linux-raw-sys.
FreeBSD also has nosymfollow support in the form of MNT_NOSYMFOLLOW, but
rustix::mount is not provided for FreeBSD.
Signed-off-by: Aleksa Sarai cyphar@cyphar.com