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unix: on ARM GNU/Linux let Pipe fall back to pipe

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Follow CL 165217 which did this for package syscall.

Android O seems to require Pipe to call the pipe2 system call.
But kernel version 2.6.23 only supports pipe, not pipe2.
So try pipe2 first, then fall back to pipe.

Updates golang/go#30549

Change-Id: Icf21433fa046ff137c0265fa96410229def482f7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/165297
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2019-03-06 07:15:16 +00:00
committed by Tobias Klauser
parent 30e92a19ae
commit a98ae47d97
2 changed files with 16 additions and 0 deletions
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unix/syscall_linux_arm.go
+6
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@@ -19,12 +19,18 @@ func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: int32(sec), Usec: int32(usec)}
}
//sysnb pipe(p *[2]_C_int) (err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
var pp [2]_C_int
// Try pipe2 first for Android O, then try pipe for kernel 2.6.23.
err = pipe2(&pp, 0)
if err == ENOSYS {
err = pipe(&pp)
}
p[0] = int(pp[0])
p[1] = int(pp[1])
return