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os: use FindFirstFile when GetFileAttributesEx fails in Stat

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Fixes #15355

Change-Id: Idbab7a627c5de249bb62d519c5a47f3d2f6c82a7
Reviewed-on: https://go-review.googlesource.com/22796
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Alex Brainman 2016-05-05 12:44:28 +10:00
parent abbd502d63
commit d13fa4d225
3 changed files with 30 additions and 1 deletions
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1
src/internal/syscall/windows/syscall_windows.go
View File

@ -7,6 +7,7 @@ package windows
import "syscall"
const (
ERROR_SHARING_VIOLATION syscall.Errno = 32
ERROR_NO_UNICODE_TRANSLATION syscall.Errno = 1113
)

11
src/os/os_windows_test.go
View File

@ -630,3 +630,14 @@ func TestReadStdin(t *testing.T) {
}
}
}
func TestStatPagefile(t *testing.T) {
_, err := os.Stat(`c:\pagefile.sys`)
if err == nil {
return
}
if os.IsNotExist(err) {
t.Skip(`skipping because c:\pagefile.sys is not found`)
}
t.Fatal(err)
}

19
src/os/stat_windows.go
View File

@ -5,6 +5,7 @@
package os
import (
"internal/syscall/windows"
"syscall"
"unsafe"
)
@ -95,7 +96,23 @@ func Lstat(name string) (FileInfo, error) {
}
e = syscall.GetFileAttributesEx(namep, syscall.GetFileExInfoStandard, (*byte)(unsafe.Pointer(&fs.sys)))
if e != nil {
return nil, &PathError{"GetFileAttributesEx", name, e}
if e != windows.ERROR_SHARING_VIOLATION {
return nil, &PathError{"GetFileAttributesEx", name, e}
}
// try FindFirstFile now that GetFileAttributesEx failed
var fd syscall.Win32finddata
h, e2 := syscall.FindFirstFile(namep, &fd)
if e2 != nil {
return nil, &PathError{"FindFirstFile", name, e}
}
syscall.FindClose(h)
fs.sys.FileAttributes = fd.FileAttributes
fs.sys.CreationTime = fd.CreationTime
fs.sys.LastAccessTime = fd.LastAccessTime
fs.sys.LastWriteTime = fd.LastWriteTime
fs.sys.FileSizeHigh = fd.FileSizeHigh
fs.sys.FileSizeLow = fd.FileSizeLow
}
fs.path = name
if !isAbs(fs.path) {