From d0baac37e61648c2a9e9299553c863cf7b7eed61 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Wed, 28 Aug 2024 16:20:44 -0700
Subject: syscall: always use prlimit for getrlimit/setrlimit on Linux

Linux added the prlimit system call in version 2.6.36.
As our minimum Linux kernel version is now 3.2,
simplify the various getrlimit/setlrimit implementations
to just always use prlimit.

For #67001

Change-Id: I2512c21c947d0bc83f8f9077c143163fd8d83be3
Reviewed-on: https://go-review.googlesource.com/c/go/+/609178
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---
 src/syscall/exec_linux.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/syscall/exec_linux.go')

diff --git a/src/syscall/exec_linux.go b/src/syscall/exec_linux.go
index e4b9ce1bf4..5ef62450a8 100644
--- a/src/syscall/exec_linux.go
+++ b/src/syscall/exec_linux.go
@@ -632,7 +632,7 @@ func forkAndExecInChild1(argv0 *byte, argv, envv []*byte, chroot, dir *byte, att
 
 	// Restore original rlimit.
 	if rlim != nil {
-		rawSetrlimit(RLIMIT_NOFILE, rlim)
+		RawSyscall6(SYS_PRLIMIT64, 0, RLIMIT_NOFILE, uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
 	}
 
 	// Enable tracing if requested.
-- 
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