mount: fix closing stdout/err and error logs

Don't spawn a setuid children with FD 1&2 closed.
Check status and not errno after posix_spawn(p).
Add comments to fix later error checking, as
posix_spawn(p) returns non-zero status only if
clone/vfork/rfork fails. If only setup (open, dup2)
or execve fails, the forked process exit with 127
but posix_spawn returns zero.

Signed-off-by: Vassili Tchersky <vt+git@vbc.su>

0 files changed, 0 insertions, 0 deletions