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// Copyright 2019 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.
//go:build darwin || dragonfly || freebsd || openbsd || netbsd || zos
// +build darwin dragonfly freebsd openbsd netbsd zos
package unix_test
import (
"fmt"
"os"
"path/filepath"
"sort"
"strings"
"testing"
"golang.org/x/sys/unix"
)
func TestGetdirentries(t *testing.T) {
for _, count := range []int{10, 1000} {
t.Run(fmt.Sprintf("n=%d", count), func(t *testing.T) {
testGetdirentries(t, count)
})
}
}
func testGetdirentries(t *testing.T, count int) {
if count > 100 && testing.Short() && os.Getenv("GO_BUILDER_NAME") == "" {
t.Skip("skipping in -short mode")
}
d := t.TempDir()
var names []string
for i := 0; i < count; i++ {
names = append(names, fmt.Sprintf("file%03d", i))
}
// Make files in the temp directory
for _, name := range names {
err := os.WriteFile(filepath.Join(d, name), []byte("data"), 0)
if err != nil {
t.Fatal(err)
}
}
// Read files using Getdirentries
fd, err := unix.Open(d, unix.O_RDONLY, 0)
if err != nil {
t.Fatalf("Open: %v", err)
}
defer unix.Close(fd)
var base uintptr
var buf [2048]byte
names2 := make([]string, 0, count)
for {
n, err := unix.Getdirentries(fd, buf[:], &base)
if err != nil {
t.Fatalf("Getdirentries: %v", err)
}
if n == 0 {
break
}
data := buf[:n]
for len(data) > 0 {
var bc int
bc, _, names2 = unix.ParseDirent(data, -1, names2)
if bc == 0 && len(data) > 0 {
t.Fatal("no progress")
}
data = data[bc:]
}
}
sort.Strings(names)
sort.Strings(names2)
if strings.Join(names, ":") != strings.Join(names2, ":") {
t.Errorf("names don't match\n names: %q\nnames2: %q", names, names2)
}
}
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