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From: Richard Palethorpe <rpalethorpe@suse.com>
To: linux-man@vger.kernel.org
Cc: Richard Palethorpe <rpalethorpe@suse.com>,
	Alejandro Colomar <alx.manpages@gmail.com>,
	Michael Kerrisk <mtk.manpages@gmail.com>
Subject: [PATCH] wait.2: Add ESRCH for when pid == INT_MIN
Date: Thu,  8 Jul 2021 11:08:53 +0100	[thread overview]
Message-ID: <20210708100853.17391-1-rpalethorpe@suse.com> (raw)

Please see upstream commit:

 commit dd83c161fbcc5d8be637ab159c0de015cbff5ba4
 Author: zhongjiang <zhongjiang@huawei.com>
 Date:   Mon Jul 10 15:53:01 2017 -0700

     kernel/exit.c: avoid undefined behaviour when calling wait4()

It avoids negating INT_MIN by returning early with ESRCH.

Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
---
 man2/wait.2 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man2/wait.2 b/man2/wait.2
index 5ae955b3f..63d872ee6 100644
--- a/man2/wait.2
+++ b/man2/wait.2
@@ -455,6 +455,15 @@ was caught; see
 The
 .I options
 argument was invalid.
+.TP
+.B ESRCH
+(for
+.BR wait ()
+or
+.BR waitpid ())
+.I pid
+is equal to
+.I INT_MIN
 .SH CONFORMING TO
 SVr4, 4.3BSD, POSIX.1-2001.
 .SH NOTES
-- 
2.31.1


             reply	other threads:[~2021-07-08 10:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-08 10:08 Richard Palethorpe [this message]
2021-07-10 18:15 ` [PATCH] wait.2: Add ESRCH for when pid == INT_MIN Alejandro Colomar (man-pages)
2021-07-12 16:11 ` Jakub Wilk
2021-07-13  7:37   ` Richard Palethorpe

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