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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package syscall_test
import (
"syscall"
"testing"
)
// testalias checks for aliasing of error strings returned by sys1 and sys2,
// which both call the function named fn in package syscall
func testalias(t *testing.T, fn string, sys1, sys2 func() error) {
err := sys1().Error()
errcopy := string([]byte(err))
sys2()
if err != errcopy {
t.Errorf("syscall.%s error string changed from %q to %q\n", fn, errcopy, err)
}
}
// issue 13770: errors cannot be nested in Plan 9
func TestPlan9Syserr(t *testing.T) {
testalias(t,
"Syscall",
func() error {
return syscall.Mkdir("/", 0)
},
func() error {
return syscall.Mkdir("#", 0)
})
testalias(t,
"Syscall6",
func() error {
return syscall.Mount(0, 0, "", 0, "")
},
func() error {
return syscall.Mount(-1, 0, "", 0, "")
})
// originally failed only on plan9_arm
testalias(t,
"seek",
func() error {
_, err := syscall.Seek(0, 0, -1)
return err
},
func() error {
_, err := syscall.Seek(-1, 0, 0)
return err
})
}
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