git: 89ecdff2c32c - main - Fix sigtimedwait manpage.

The branch main has been updated by dchagin:

URL: https://cgit.FreeBSD.org/src/commit/?id=89ecdff2c32c4e8975f8652c5cb913eba8642204

commit 89ecdff2c32c4e8975f8652c5cb913eba8642204
Author:     Dmitry Chagin <dchagin@FreeBSD.org>
AuthorDate: 2022-04-21 07:52:29 +0000
Commit:     Dmitry Chagin <dchagin@FreeBSD.org>
CommitDate: 2022-04-21 07:52:29 +0000

    Fix sigtimedwait manpage.
    
    Historically, sigtimedwait() blocks indefinitely if timeout is NULL.
    
    Reviewed by:            jilles, imp
    Differential Revision:  https://reviews.freebsd.org/D34985
    MFC after:              2 weeks
---
 lib/libc/sys/sigwaitinfo.2 | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/libc/sys/sigwaitinfo.2 b/lib/libc/sys/sigwaitinfo.2
index b497592ed1f3..bb060811f5d7 100644
--- a/lib/libc/sys/sigwaitinfo.2
+++ b/lib/libc/sys/sigwaitinfo.2
@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 27, 2012
+.Dd April 21, 2022
 .Dt SIGTIMEDWAIT 2
 .Os
 .Sh NAME
@@ -70,7 +70,9 @@ If
 .Fa timeout
 is the
 .Dv NULL
-pointer, the behavior is unspecified.
+pointer,
+.Fn sigtimedwait
+blocks indefinitely.
 .Dv CLOCK_MONOTONIC
 clock is used to measure the time interval specified by the
 .Fa timeout
@@ -204,3 +206,10 @@ and
 .Fn sigwaitinfo
 system calls conform to
 .St -p1003.1-96 .
+POSIX
+leaves the behavior of
+.Fn sigtimedwait
+with a
+.Dv NULL
+.Fa timeout
+pointer unspecified.