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unix: do not return non-nil error for 0 errno in FcntlInt

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Fixes golang/go#26078

Change-Id: Ie5a8c7028a755bc7a8d56abc4736a5f61ef91ce5
Reviewed-on: https://go-review.googlesource.com/121175
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Ian Lance Taylor
2018-06-27 14:26:11 +00:00
parent c4afb3effa
commit 7138fd3d9d
3 changed files with 28 additions and 2 deletions
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unix/syscall_solaris.go
+5 -1
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@@ -314,7 +314,11 @@ func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {
// FcntlInt performs a fcntl syscall on fd with the provided command and argument.
func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
valptr, _, err := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0)
valptr, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0)
var err error
if errno != 0 {
err = errno
}
return int(valptr), err
}