pub static zsh_subshell: Atomic<i32>Expand description
Port of mod_export int zsh_subshell; from Src/init.c:67. Visible
$ZSH_SUBSHELL parameter — incremented by entersubsh() each time
the shell forks into a subshell (real or fake-exec). Distinct from
subsh which records whether we ARE a subshell; zsh_subshell is
the visible depth count.