155 lines
3.4 KiB
Go
155 lines
3.4 KiB
Go
package syscallcompat
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import (
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"bytes"
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"os"
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"syscall"
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"testing"
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)
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func TestReadlinkat(t *testing.T) {
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for _, targetLen := range []int{100, 500, 4000} {
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target := string(bytes.Repeat([]byte("x"), targetLen))
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err := syscall.Symlink(target, tmpDir+"/readlinkat")
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if err != nil {
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if targetLen > 1000 {
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// Symlinks longer than 1024 (?) bytes are not supported on
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// MacOS and XFS
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t.Logf("skipping targetLen=%d: %v", targetLen, err)
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continue
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}
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t.Fatalf("targetLen=%d: %v", targetLen, err)
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}
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target2, err := Readlinkat(tmpDirFd, "readlinkat")
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if err != nil {
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t.Fatal(err)
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}
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if target != target2 {
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t.Errorf("target=%q != target2=%q", target, target2)
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}
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err = syscall.Unlink(tmpDir + "/readlinkat")
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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func TestOpenat(t *testing.T) {
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_, err := Openat(tmpDirFd, "testOpenAt", 0, 0)
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if err == nil {
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t.Errorf("should have failed")
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}
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fd, err := os.Create(tmpDir + "/testOpenAt")
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if err != nil {
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t.Fatal(err)
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}
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fd.Close()
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rawFd, err := Openat(tmpDirFd, "testOpenAt", 0, 0)
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if err != nil {
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t.Fatal(err)
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}
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defer syscall.Close(rawFd)
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if rawFd < 0 {
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t.Fatalf("rawFd=%d", rawFd)
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}
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// Test with absolute path
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rawFd, err = Openat(-1, tmpDir+"/testOpenAt", 0, 0)
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if err != nil {
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t.Fatal(err)
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}
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defer syscall.Close(rawFd)
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if rawFd < 0 {
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t.Fatalf("rawFd=%d", rawFd)
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}
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}
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func TestRenameat(t *testing.T) {
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os.Mkdir(tmpDir+"/dir1", 0700)
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dir1, err := os.Open(tmpDir + "/dir1")
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if err != nil {
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t.Fatal(err)
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}
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defer dir1.Close()
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os.Mkdir(tmpDir+"/dir2", 0700)
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dir2, err := os.Open(tmpDir + "/dir2")
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if err != nil {
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t.Fatal(err)
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}
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defer dir2.Close()
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fd, err := os.Create(tmpDir + "/dir1/f1")
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if err != nil {
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t.Fatal(err)
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}
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fd.Close()
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err = Renameat(int(dir1.Fd()), "f1", int(dir2.Fd()), "f2")
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if err != nil {
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t.Fatal(err)
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}
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_, err = os.Stat(tmpDir + "/dir2/f2")
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if err != nil {
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t.Fatal(err)
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}
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// Test with absolute path
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err = Renameat(-1, tmpDir+"/dir2/f2", -1, tmpDir+"/dir2/f1")
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if err != nil {
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t.Fatal(err)
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}
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_, err = os.Stat(tmpDir + "/dir2/f1")
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if err != nil {
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t.Fatal(err)
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}
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}
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func TestFchmodat(t *testing.T) {
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regular := "TestFchmodat_Regular"
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f, err := os.OpenFile(tmpDir+"/"+regular, os.O_CREATE|os.O_WRONLY, 0000)
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if err != nil {
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t.Fatal(err)
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}
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f.Close()
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symlink := "TestFchmodat_Symlink"
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err = syscall.Symlink(regular, tmpDir+"/"+symlink)
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if err != nil {
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t.Fatal(err)
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}
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dirfd, err := syscall.Open(tmpDir, syscall.O_RDONLY, 0)
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if err != nil {
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t.Fatal(err)
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}
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defer syscall.Close(dirfd)
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// Check that chmod on a regular file works ok
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err = Fchmodat(dirfd, regular, 0111, 0)
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if err != nil {
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t.Fatal(err)
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}
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var st syscall.Stat_t
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syscall.Lstat(tmpDir+"/"+regular, &st)
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st.Mode &= 0777
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if st.Mode != 0111 {
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t.Errorf("wrong mode: %#0o", st.Mode)
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}
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err = Fchmodat(dirfd, regular, 0000, 0)
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if err != nil {
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t.Error(err)
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}
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syscall.Lstat(tmpDir+"/"+regular, &st)
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st.Mode &= 0777
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if st.Mode != 0000 {
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t.Errorf("wrong mode: %#0o", st.Mode)
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}
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// Check what happens on a symlink
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err = Fchmodat(dirfd, symlink, 0333, 0)
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if err == nil {
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syscall.Lstat(tmpDir+"/"+symlink, &st)
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st.Mode &= 0777
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t.Errorf("chmod on symlink should have failed, but did not. New mode=%#0o", st.Mode)
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}
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syscall.Lstat(tmpDir+"/"+regular, &st)
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st.Mode &= 0777
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if st.Mode != 0000 {
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t.Errorf("chmod on symlink affected symlink target: New mode=%#0o", st.Mode)
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}
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}
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