[libc-commits] [libc] [libc][wait] add comment about __W_CONTINUED value (PR #125934)

Nick Desaulniers via libc-commits libc-commits at lists.llvm.org
Wed Feb 5 13:15:12 PST 2025


https://github.com/nickdesaulniers created https://github.com/llvm/llvm-project/pull/125934

None

>From ff267ea85c518d8f28eea3f29547388e39b17795 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers at google.com>
Date: Wed, 5 Feb 2025 13:14:47 -0800
Subject: [PATCH] [libc][wait] add comment about __W_CONTINUED value

---
 libc/src/sys/wait/wait4Impl.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libc/src/sys/wait/wait4Impl.h b/libc/src/sys/wait/wait4Impl.h
index ec84eee491de24..f2bdeb02f8668d 100644
--- a/libc/src/sys/wait/wait4Impl.h
+++ b/libc/src/sys/wait/wait4Impl.h
@@ -65,6 +65,8 @@ LIBC_INLINE ErrorOr<pid_t> wait4impl(pid_t pid, int *wait_status, int options,
       *wait_status = W_STOPCODE(info.si_status);
       break;
     case CLD_CONTINUED:
+      // Set wait_status to a value that the caller can check via WIFCONTINUED.
+      // glibc has a non-POSIX macro definition __W_CONTINUED for this value.
       *wait_status = 0xffff;
       break;
     default:



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