131 lines
2.9 KiB
Go
131 lines
2.9 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 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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// symlinkCheckMode looks if the mode bits in "st" say that this is a symlink.
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// Calls t.Fatal() if not.
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func symlinkCheckMode(t *testing.T, st syscall.Stat_t) {
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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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return
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}
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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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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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symlinkCheckMode(t, st)
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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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symlinkCheckMode(t, st)
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}
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func TestEmulateMkdirat(t *testing.T) {
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err := emulateMkdirat(tmpDirFd, "mkdirat", 0700)
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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", 0700)
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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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