Brad Fitzpatrick 9f0b1ff7b4 unix: add FileHandle, NewFileHandle, NameToHandleAt, OpenByHandleAt ...

This adds wrappers around name_to_handle_at and open_by_handle_at.

Requires root (or CAP_DAC_READ_SEARCH, rather) to run tests, which at
least some of our builders have.

bradfitz@go:~/src/golang.org/x/sys/unix$ go test -c && sudo ./unix.test -test.run=OpenBy -test.v=true
=== RUN   TestOpenByHandleAt
=== RUN   TestOpenByHandleAt/clone=false
=== RUN   TestOpenByHandleAt/clone=true
--- PASS: TestOpenByHandleAt (0.00s)
    syscall_linux_test.go:546: mountID: 22, handle: size=8, type=1, bytes="\x9e\x1e\b\x00~\x8c\xe5\x9d"
    --- PASS: TestOpenByHandleAt/clone=false (0.00s)
        syscall_linux_test.go:568: opened fd 3
    --- PASS: TestOpenByHandleAt/clone=true (0.00s)
        syscall_linux_test.go:568: opened fd 3
PASS

Fixes golang/go#30537

Change-Id: Ia48a8faab2fee665d88a16d81a3a0c1504b129ce
Reviewed-on: https://go-review.googlesource.com/c/sys/+/173357
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

2019-04-25 04:54:58 +00:00

53 KiB

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