303 lines
6.5 KiB
Go
303 lines
6.5 KiB
Go
package syscallcompat
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import (
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"os"
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"runtime"
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"syscall"
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"testing"
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"golang.org/x/sys/unix"
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)
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func TestEmulateOpenat(t *testing.T) {
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_, err := emulateOpenat(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 := emulateOpenat(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 = emulateOpenat(-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 TestEmulateRenameat(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 = emulateRenameat(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 = emulateRenameat(-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 TestEmulateUnlinkat(t *testing.T) {
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os.Mkdir(tmpDir+"/unlink1", 0700)
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dirfd, err := os.Open(tmpDir + "/unlink1")
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if err != nil {
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t.Fatal(err)
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}
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defer dirfd.Close()
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// Try to delete file
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fd, err := os.Create(tmpDir + "/unlink1/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 = emulateUnlinkat(int(dirfd.Fd()), "f1", 0)
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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 + "/unlink1/f1")
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if err == nil {
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t.Fatalf("file not deleted!")
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}
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// Try to delete dir
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err = os.Mkdir(tmpDir+"/unlink1/d1", 0700)
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if err != nil {
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t.Fatal(err)
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}
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err = emulateUnlinkat(int(dirfd.Fd()), "d1", 0)
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if err == nil {
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t.Fatalf("this should fail due to missing AT_REMOVEDIR flag")
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}
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err = emulateUnlinkat(int(dirfd.Fd()), "d1", unix.AT_REMOVEDIR)
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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 + "/unlink1/d1")
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if err == nil {
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t.Fatalf("dir not deleted!")
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}
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// Test with absolute path
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err = os.Mkdir(tmpDir+"/unlink1/d1", 0700)
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if err != nil {
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t.Fatal(err)
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}
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err = emulateUnlinkat(-1, tmpDir+"/unlink1/d1", unix.AT_REMOVEDIR)
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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 + "/unlink1/d1")
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if err == nil {
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t.Fatalf("dir not deleted!")
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}
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}
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func TestEmulateMknodat(t *testing.T) {
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err := emulateMknodat(tmpDirFd, "fifo1", unix.S_IFIFO, 0)
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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 + "/fifo1")
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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 = emulateMknodat(-1, tmpDir+"/fifo2", unix.S_IFIFO, 0)
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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 + "/fifo2")
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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 TestEmulateFchmodat(t *testing.T) {
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fd, err := os.Create(tmpDir + "/chmod")
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if err != nil {
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t.Fatal(err)
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}
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err = fd.Chmod(0654)
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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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// Chmod a normal file
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err = emulateFchmodat(tmpDirFd, "chmod", 0600, 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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err = syscall.Lstat(tmpDir+"/chmod", &st)
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if err != nil {
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t.Fatal(err)
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}
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if st.Mode != 0100600 {
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t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100600)
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}
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// Chmod a symlink (original file should not change)
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err = os.Symlink(tmpDir+"/chmod", tmpDir+"/chmodSymlink")
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if err != nil {
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t.Fatal(err)
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}
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err = emulateFchmodat(tmpDirFd, "chmodSymlink", 0123, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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t.Fatal(err)
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}
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err = syscall.Lstat(tmpDir+"/chmod", &st)
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if err != nil {
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t.Fatal(err)
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}
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if st.Mode != 0100600 {
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t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100600)
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}
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// Test with absolute path
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err = emulateFchmodat(-1, tmpDir+"/chmod", 0400, 0)
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if err != nil {
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t.Fatal(err)
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}
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err = syscall.Lstat(tmpDir+"/chmod", &st)
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if err != nil {
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t.Fatal(err)
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}
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if st.Mode != 0100400 {
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t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100400)
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}
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}
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func TestEmulateFchownat(t *testing.T) {
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t.Skipf("TODO")
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}
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func TestEmulateSymlinkat(t *testing.T) {
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err := emulateSymlinkat("/foo/bar/baz", tmpDirFd, "symlink1")
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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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err = syscall.Lstat(tmpDir+"/symlink1", &st)
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if err != nil {
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t.Fatal(err)
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}
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if runtime.GOOS == "darwin" {
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// On MacOS, symlinks don't carry their own permissions, so
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// only check the file type.
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if st.Mode&syscall.S_IFMT != syscall.S_IFLNK {
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t.Fatalf("This is not a symlink: mode = 0%o", st.Mode)
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}
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} else {
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if st.Mode != 0120777 {
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t.Fatalf("Wrong mode, have 0%o, want 0120777", st.Mode)
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}
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}
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// Test with absolute path
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err = emulateSymlinkat("/foo/bar/baz", -1, tmpDir+"/symlink2")
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if err != nil {
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t.Fatal(err)
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}
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err = syscall.Lstat(tmpDir+"/symlink2", &st)
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if err != nil {
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t.Fatal(err)
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}
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if st.Mode != 0120777 {
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t.Fatalf("Wrong mode, have %o, want 0120777", st.Mode)
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}
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}
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func TestEmulateMkdirat(t *testing.T) {
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err := emulateMkdirat(tmpDirFd, "mkdirat", 0100)
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if err != nil {
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t.Fatal(err)
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}
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fi, err := os.Stat(tmpDir + "/mkdirat")
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if err != nil {
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t.Fatal(err)
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}
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if !fi.IsDir() {
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t.Fatalf("mkdirat did not create a directory")
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}
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// Test with absolute path
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err = emulateMkdirat(-1, tmpDir+"/mkdirat2", 0100)
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if err != nil {
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t.Fatal(err)
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}
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fi, err = os.Stat(tmpDir + "/mkdirat2")
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if err != nil {
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t.Fatal(err)
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}
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if !fi.IsDir() {
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t.Fatalf("mkdirat did not create a directory")
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}
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}
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func TestEmulateFstatat(t *testing.T) {
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var st unix.Stat_t
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// stat a normal file (size 3)
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f, err := os.Create(tmpDir + "/fstatat")
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if err != nil {
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t.Fatal(err)
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}
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_, err = f.Write([]byte("foo"))
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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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err = emulateFstatat(tmpDirFd, "fstatat", &st, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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t.Fatal(err)
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}
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if st.Size != 3 {
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t.Errorf("wrong file size: %d", st.Size)
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}
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// stat a symlink and check that the size matches the length of the
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// symlink target. This proves that we have stat'ed the symlink itself.
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err = os.Symlink(tmpDir+"/fstatat", tmpDir+"/fstatatSymlink")
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if err != nil {
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t.Fatal(err)
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}
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err = emulateFstatat(tmpDirFd, "fstatatSymlink", &st, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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t.Fatal(err)
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}
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expectedSize := int64(len(tmpDir + "/fstatat"))
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if st.Size != expectedSize {
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t.Errorf("symlink size: expected=%d, got=%d", expectedSize, st.Size)
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}
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}
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