K 10
svn:author
V 6
jilles
K 8
svn:date
V 27
2011-03-20T23:52:45.008530Z
K 7
svn:log
V 553
sh(1): Describe subshell environment, command substitution more correctly.

POSIX does not require the shell to fork for a subshell environment, and we
use that possibility in various ways (command substitutions with a single
command and most subshells that are the final command of a shell process).
Therefore do not tie subshells to forking in the man page.

Command substitutions with expansions are a bit strange, causing a fork for
$(...$(($x))...) because $x might expand to y=2; they will probably be
changed later but this is how they work now.

END