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unix: add Xucred, GetsockoptXucred on darwin

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Test adapted from CL 134535 from Tyler Julian (@APTy).

For posterity, the auto-generated parts were updated with:

    GOARCH_TARGET=amd64 go tool cgo -godefs types_darwin.go | GOOS=darwin GOARCH_TARGET=amd64 go run mkpost.go > ztypes_darwin_amd64.go
    GOARCH_TARGET=arm64 go tool cgo -godefs types_darwin.go | GOOS=darwin GOARCH_TARGET=arm64 go run mkpost.go > ztypes_darwin_arm64.go
    GOOS=darwin GOARCH=amd64 ./mkerrors.sh -m64 > zerrors_darwin_amd64.go ; gofmt -w zerrors_darwin_amd64.go
    GOOS=darwin GOARCH=arm64 ./mkerrors.sh -m64 > zerrors_darwin_arm64.go ; gofmt -w zerrors_darwin_arm64.go
    perl -i -npe 's,( cgo -godefs(?: -- -m64)? )/.+/(\S+.go),$$1$$2,' zerrors_darwin_amd64.go zerrors_darwin_arm64.go ztypes_darwin_amd64.go ztypes_darwin_arm64.go

Fixes golang/go#27613

Change-Id: Ie41b3da840cb9c8c140c57ecfb78e7abc4f70bea
Reviewed-on: https://go-review.googlesource.com/c/sys/+/292330
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Brad Fitzpatrick
2021-02-16 22:45:49 +00:00
parent f7da38b97c
commit f992740a1b
8 changed files with 81 additions and 1 deletions
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unix/syscall_darwin.go
+9
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@@ -378,6 +378,15 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
return
}
// GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
// The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
x := new(Xucred)
vallen := _Socklen(unsafe.Sizeof(Xucred{}))
err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
return x, err
}
//sys sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error)
/*