linux-kernel - [PATCH 15/15] tools/nolibc: implement wait() in terms of waitpid()

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Message-Id: <20250423-nolibc-misc-v1-15-a925bf40297b@linutronix.de>
Date: Wed, 23 Apr 2025 17:01:45 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Willy Tarreau <w@....eu>, 
 Thomas Weißschuh <linux@...ssschuh.net>, 
 Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 15/15] tools/nolibc: implement wait() in terms of waitpid()

Newer architectures like riscv 32-bit are missing sys_wait4().
Make use of the fact that wait(&status) is defined to be equivalent to
waitpid(-1, status, 0) to implment it on all architectures.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 tools/include/nolibc/sys/wait.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/include/nolibc/sys/wait.h b/tools/include/nolibc/sys/wait.h
index 9a68e6a6b1df8f938225007eb0de0574257ccf00..9783632a80bc20e0175a8842e7a7aea27defeb27 100644
--- a/tools/include/nolibc/sys/wait.h
+++ b/tools/include/nolibc/sys/wait.h
@@ -28,12 +28,6 @@ pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
 #endif
 }
 
-static __attribute__((unused))
-pid_t wait(int *status)
-{
-	return __sysret(sys_wait4(-1, status, 0, NULL));
-}
-
 static __attribute__((unused))
 pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
 {
@@ -110,6 +104,12 @@ pid_t waitpid(pid_t pid, int *status, int options)
 	return info.si_pid;
 }
 
+static __attribute__((unused))
+pid_t wait(int *status)
+{
+	return waitpid(-1, status, 0);
+}
+
 
 /* make sure to include all global symbols */
 #include "../nolibc.h"

-- 
2.49.0