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unix: use dup3 in Dup2 on all Linux platforms

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The minimum required Linux kernel version for Go 1.18 will be changed to
2.6.32, see golang/go#45964. The dup3 syscall was added in 2.6.27, so it
can be used instead of the dup2 syscall which is not implemented on
arm64 and riscv64 or blocked on android.

For golang/go#45964

Change-Id: I9c677db4bae3ce441b258c49580fb9a2cd600436
Reviewed-on: https://go-review.googlesource.com/c/sys/+/350552
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2021-09-21 06:55:28 +00:00
committed by Tobias Klauser
parent d61c044b16
commit 437939a702
24 changed files with 1 additions and 143 deletions
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unix/syscall_linux_arm.go
-1
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@@ -46,7 +46,6 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
// 64-bit file system and 32-bit uid calls
// (16-bit uid calls are not always supported in newer kernels)
//sys dup2(oldfd int, newfd int) (err error)
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64