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-rw-r--r--Doc/Zsh/builtins.yo3
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/Zsh/builtins.yo b/Doc/Zsh/builtins.yo
index 51c1fd00c..e84084cd4 100644
--- a/Doc/Zsh/builtins.yo
+++ b/Doc/Zsh/builtins.yo
@@ -692,6 +692,9 @@ tt(SIGIO), assuming they correspond to the same signal number. tt(kill
show if the alternative form corresponds to a signal number. For example,
under Linux tt(kill -l IO) and tt(kill -l POLL) both output 29, hence
tt(kill -IO) and tt(kill -POLL) have the same effect.
+
+Many systems will allow process IDs to be negative to kill a process
+group or zero to kill the current process group.
)
findex(let)
item(tt(let) var(arg) ...)(