linux-kernel - [PATCH] tools/nolibc: Implement WTERMSIG()

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Message-Id: <20230427-nolibc-wtermsig-v1-1-6baf4219bb32@kernel.org>
Date:   Fri, 28 Apr 2023 16:24:36 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Willy Tarreau <w@....eu>, "Paul E. McKenney" <paulmck@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH] tools/nolibc: Implement WTERMSIG()

Add an implementation of WTERMSIG() to allow nolibc programs to obtain the
signal that caused the exit of a process, and use it in WIFEXITED() since
the condition being checked there is that no signal was reported.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/include/nolibc/types.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
index fbbc0e68c001..eb0b9f1ffe18 100644
--- a/tools/include/nolibc/types.h
+++ b/tools/include/nolibc/types.h
@@ -79,8 +79,9 @@
 #define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2

 /* Macros used on waitpid()'s return status */
+#define WTERMSIG(status)    ((status) & 0x7f)
 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
-#define WIFEXITED(status)   (((status) & 0x7f) == 0)
+#define WIFEXITED(status)   (WTERMSIG(status) == 0)

 /* waitpid() flags */
 #define WNOHANG      1

---
base-commit: 457391b0380335d5e9a5babdec90ac53928b23b4
change-id: 20230427-nolibc-wtermsig-95c5d064f949

Best regards,
-- 
Mark Brown <broonie@...nel.org>