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kill.2: Small improvements to text on historical rules for permissions 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2013-08-09 08:41:53 +02:00
parent eda6a3fc1a
commit 9e3859ed2b
1 changed files with 4 additions and 3 deletions
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7
man2/kill.2
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@ -96,6 +96,7 @@ In the case of
.B SIGCONT
it suffices when the sending and receiving
processes belong to the same session.
(Historically, the rules were different; see NOTES.)
.SH RETURN VALUE
On success (at least one signal was sent), zero is returned.
On error, \-1 is returned, and
@ -150,11 +151,11 @@ to send a signal to another process.
.\" In the 0.* kernels things chopped and changed quite
.\" a bit - MTK, 24 Jul 02
In kernels 1.0 to 1.2.2, a signal could be sent if the
effective user ID of the sender matched that of the receiver,
or the real user ID of the sender matched that of the receiver.
effective user ID of the sender matched effective user ID of the target,
or the real user ID of the sender matched the real user ID of the target.
From kernel 1.2.3 until 1.3.77, a signal could be sent if the
effective user ID of the sender matched either the real or effective
user ID of the receiver.
user ID of the target.
The current rules, which conform to POSIX.1-2001, were adopted
in kernel 1.3.78.
.SH BUGS