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unix: fix Select to return number of ready fds on Darwin and *BSD

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Make Select's signature on Darwin and the BSDs match the one on Linux
and return the number of ready file descriptors.

Fixes golang/go#34458

Change-Id: Ia618ce34ff754f2b731d7f913cab840d7948579c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/196802
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
2019-09-24 06:27:00 +00:00
committed by Tobias Klauser
parent 0a153f010e
commit 2aa67d56cd
45 changed files with 343 additions and 268 deletions
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unix/zsyscall_darwin_amd64.go
+3 -2
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@@ -1851,8 +1851,9 @@ func libc_lseek_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) {
_, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(n), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
r0, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}