unix: add Fstatat on Linux for all GOOSes

Looks like it's enough to just add wrappers pointing to the
corresponding SYS_FSTATAT{,64} or SYS_NEWFSTATAT syscall. Add a test to
verify that assumption which checks that the returned stat data matches
what is returned by Stat/Lstat.

Also add the AT_NO_AUTOMOUNT constant which may be used for the flags
parmeter.

Fixes golang/go#14216

Change-Id: I73f27b483bd97d2dcf09d4b95a7957e75d194395
Reviewed-on: https://go-review.googlesource.com/79795
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
2017-11-24 17:10:47 +00:00
committed by Brad Fitzpatrick
parent a13efeb2fd
commit 4ff8c001ce
32 changed files with 208 additions and 1 deletions
+38
View File
@@ -195,6 +195,44 @@ func TestUname(t *testing.T) {
t.Logf("OS: %s/%s %s", string(utsname.Sysname[:]), string(utsname.Machine[:]), string(utsname.Release[:]))
}
func TestFstatat(t *testing.T) {
defer chtmpdir(t)()
touch(t, "file1")
var st1 unix.Stat_t
err := unix.Stat("file1", &st1)
if err != nil {
t.Fatalf("Stat: %v", err)
}
var st2 unix.Stat_t
err = unix.Fstatat(unix.AT_FDCWD, "file1", &st2, 0)
if err != nil {
t.Fatalf("Fstatat: %v", err)
}
if st1 != st2 {
t.Errorf("Fstatat: returned stat does not match Stat")
}
os.Symlink("file1", "symlink1")
err = unix.Lstat("symlink1", &st1)
if err != nil {
t.Fatalf("Lstat: %v", err)
}
err = unix.Fstatat(unix.AT_FDCWD, "symlink1", &st2, unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
t.Fatalf("Fstatat: %v", err)
}
if st1 != st2 {
t.Errorf("Fstatat: returned stat does not match Lstat")
}
}
// utilities taken from os/os_test.go
func touch(t *testing.T, name string) {