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1a0d75d47c
Since we now have sh.current_ppid, we might as well point a shell
variable to it, as the cost is nil.
Together, ${.sh.pid} and ${.sh.ppid} (updated when a virtual
subshell forks) form a logical counterpart pair to $$ and $PPID
(never updated in subshells).
This commit also adds a section to the manual page that hopefully
does away with the depressingly widespread subshell/child shell
confusion once and for all... :P
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| Mamfile | ||