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unix: use Fstatat for Stat on linux/amd64

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The stat syscall is disallowed by Android's seccomp policy on
linux/amd64. Use the fstatat syscall with AT_FDCWD and zero flags to
achieve the same behavior.

CL 109835 did the same for package syscall.

Change-Id: Iaa7d0dbf17ade4803f59b4361973ce627bcb65b4
Reviewed-on: https://go-review.googlesource.com/110061
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
2018-04-29 09:29:05 +02:00
committed by Tobias Klauser
parent cbbc999da3
commit f67ecc163a
2 changed files with 6 additions and 16 deletions
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7
unix/syscall_linux_amd64.go
View File

@@ -48,7 +48,12 @@ func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Stat(path string, stat *Stat_t) (err error)
func Stat(path string, stat *Stat_t) (err error) {
// Use fstatat, because Android's seccomp policy blocks stat.
return Fstatat(AT_FDCWD, path, stat, 0)
}
//sys Statfs(path string, buf *Statfs_t) (err error)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error)

15
unix/zsyscall_linux_amd64.go
View File

@@ -1897,21 +1897,6 @@ func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n i
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Stat(path string, stat *Stat_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_STAT, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Statfs(path string, buf *Statfs_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)