mv src/lib to src/pkg

tests: all.bash passes, gobuild still works, godoc still works.

R=rsc
OCL=30096
CL=30102

1 files changed, 549 insertions, 0 deletions

diff --git a/src/pkg/os/os_test.go b/src/pkg/os/os_test.go
new file mode 100644
index 000000000..9f3e833f3
--- /dev/null
+++ b/src/pkg/os/os_test.go
@@ -0,0 +1,549 @@
+// Copyright 2009 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 os
+
+import (
+	"fmt";
+	"io";
+	"os";
+	"testing";
+)
+
+var dot = []string{
+	"dir_darwin_amd64.go",
+	"dir_linux_amd64.go",
+	"env.go",
+	"error.go",
+	"file.go",
+	"os_test.go",
+	"time.go",
+	"types.go",
+	"stat_darwin_amd64.go",
+	"stat_linux_amd64.go"
+}
+
+var etc = []string{
+	"group",
+	"hosts",
+	"passwd",
+}
+
+func size(name string, t *testing.T) uint64 {
+	file, err := Open(name, O_RDONLY, 0);
+	defer file.Close();
+	if err != nil {
+		t.Fatal("open failed:", err);
+	}
+	var buf [100]byte;
+	len := 0;
+	for {
+		n, e := file.Read(&buf);
+		if n < 0 || e != nil {
+			t.Fatal("read failed:", err);
+		}
+		if n == 0 {
+			break
+		}
+		len += n;
+	}
+	return uint64(len)
+}
+
+func TestStat(t *testing.T) {
+	dir, err := Stat("/etc/passwd");
+	if err != nil {
+		t.Fatal("stat failed:", err);
+	}
+	if dir.Name != "passwd" {
+		t.Error("name should be passwd; is", dir.Name);
+	}
+	filesize := size("/etc/passwd", t);
+	if dir.Size != filesize {
+		t.Error("size should be ", filesize, "; is", dir.Size);
+	}
+}
+
+func TestFstat(t *testing.T) {
+	file, err1 := Open("/etc/passwd", O_RDONLY, 0);
+	defer file.Close();
+	if err1 != nil {
+		t.Fatal("open failed:", err1);
+	}
+	dir, err2 := file.Stat();
+	if err2 != nil {
+		t.Fatal("fstat failed:", err2);
+	}
+	if dir.Name != "passwd" {
+		t.Error("name should be passwd; is", dir.Name);
+	}
+	filesize := size("/etc/passwd", t);
+	if dir.Size != filesize {
+		t.Error("size should be ", filesize, "; is", dir.Size);
+	}
+}
+
+func TestLstat(t *testing.T) {
+	dir, err := Lstat("/etc/passwd");
+	if err != nil {
+		t.Fatal("lstat failed:", err);
+	}
+	if dir.Name != "passwd" {
+		t.Error("name should be passwd; is", dir.Name);
+	}
+	filesize := size("/etc/passwd", t);
+	if dir.Size != filesize {
+		t.Error("size should be ", filesize, "; is", dir.Size);
+	}
+}
+
+func testReaddirnames(dir string, contents []string, t *testing.T) {
+	file, err := Open(dir, O_RDONLY, 0);
+	defer file.Close();
+	if err != nil {
+		t.Fatalf("open %q failed: %v", dir, err);
+	}
+	s, err2 := file.Readdirnames(-1);
+	if err2 != nil {
+		t.Fatalf("readdirnames %q failed: %v", err2);
+	}
+	for i, m := range contents {
+		found := false;
+		for j, n := range s {
+			if n == "." || n == ".." {
+				t.Errorf("got %s in directory", n);
+			}
+			if m == n {
+				if found {
+					t.Error("present twice:", m);
+				}
+				found = true
+			}
+		}
+		if !found {
+			t.Error("could not find", m);
+		}
+	}
+}
+
+func testReaddir(dir string, contents []string, t *testing.T) {
+	file, err := Open(dir, O_RDONLY, 0);
+	defer file.Close();
+	if err != nil {
+		t.Fatalf("open %q failed: %v", dir, err);
+	}
+	s, err2 := file.Readdir(-1);
+	if err2 != nil {
+		t.Fatalf("readdir %q failed: %v", dir, err2);
+	}
+	for i, m := range contents {
+		found := false;
+		for j, n := range s {
+			if m == n.Name {
+				if found {
+					t.Error("present twice:", m);
+				}
+				found = true
+			}
+		}
+		if !found {
+			t.Error("could not find", m);
+		}
+	}
+}
+
+func TestReaddirnames(t *testing.T) {
+	testReaddirnames(".", dot, t);
+	testReaddirnames("/etc", etc, t);
+}
+
+func TestReaddir(t *testing.T) {
+	testReaddir(".", dot, t);
+	testReaddir("/etc", etc, t);
+}
+
+// Read the directory one entry at a time.
+func smallReaddirnames(file *File, length int, t *testing.T) []string {
+	names := make([]string, length);
+	count := 0;
+	for {
+		d, err := file.Readdirnames(1);
+		if err != nil {
+			t.Fatalf("readdir %q failed: %v", file.Name(), err);
+		}
+		if len(d) == 0 {
+			break
+		}
+		names[count] = d[0];
+		count++;
+	}
+	return names[0:count]
+}
+
+// Check that reading a directory one entry at a time gives the same result
+// as reading it all at once.
+func TestReaddirnamesOneAtATime(t *testing.T) {
+	dir := "/usr/bin";	// big directory that doesn't change often.
+	file, err := Open(dir, O_RDONLY, 0);
+	defer file.Close();
+	if err != nil {
+		t.Fatalf("open %q failed: %v", dir, err);
+	}
+	all, err1 := file.Readdirnames(-1);
+	if err1 != nil {
+		t.Fatalf("readdirnames %q failed: %v", dir, err1);
+	}
+	file1, err2 := Open(dir, O_RDONLY, 0);
+	if err2 != nil {
+		t.Fatalf("open %q failed: %v", dir, err2);
+	}
+	small := smallReaddirnames(file1, len(all)+100, t);	// +100 in case we screw up
+	for i, n := range all {
+		if small[i] != n {
+			t.Errorf("small read %q %q mismatch: %v", small[i], n);
+		}
+	}
+}
+
+func TestHardLink(t *testing.T) {
+	from, to := "hardlinktestfrom", "hardlinktestto";
+	Remove(from); // Just in case.
+	file, err := Open(to, O_CREAT | O_WRONLY, 0666);
+	if err != nil {
+		t.Fatalf("open %q failed: %v", to, err);
+	}
+	defer Remove(to);
+	if err = file.Close(); err != nil {
+		t.Errorf("close %q failed: %v", to, err);
+	}
+	err = Link(to, from);
+	if err != nil {
+		t.Fatalf("link %q, %q failed: %v", to, from, err);
+	}
+	defer Remove(from);
+	tostat, err := Stat(to);
+	if err != nil {
+		t.Fatalf("stat %q failed: %v", to, err);
+	}
+	fromstat, err := Stat(from);
+	if err != nil {
+		t.Fatalf("stat %q failed: %v", from, err);
+	}
+	if tostat.Dev != fromstat.Dev || tostat.Ino != fromstat.Ino {
+		t.Errorf("link %q, %q did not create hard link", to, from);
+	}
+}
+
+func TestSymLink(t *testing.T) {
+	from, to := "symlinktestfrom", "symlinktestto";
+	Remove(from); // Just in case.
+	file, err := Open(to, O_CREAT | O_WRONLY, 0666);
+	if err != nil {
+		t.Fatalf("open %q failed: %v", to, err);
+	}
+	defer Remove(to);
+	if err = file.Close(); err != nil {
+		t.Errorf("close %q failed: %v", to, err);
+	}
+	err = Symlink(to, from);
+	if err != nil {
+		t.Fatalf("symlink %q, %q failed: %v", to, from, err);
+	}
+	defer Remove(from);
+	tostat, err := Stat(to);
+	if err != nil {
+		t.Fatalf("stat %q failed: %v", to, err);
+	}
+	if tostat.FollowedSymlink {
+		t.Fatalf("stat %q claims to have followed a symlink", to);
+	}
+	fromstat, err := Stat(from);
+	if err != nil {
+		t.Fatalf("stat %q failed: %v", from, err);
+	}
+	if tostat.Dev != fromstat.Dev || tostat.Ino != fromstat.Ino {
+		t.Errorf("symlink %q, %q did not create symlink", to, from);
+	}
+	fromstat, err = Lstat(from);
+	if err != nil {
+		t.Fatalf("lstat %q failed: %v", from, err);
+	}
+	if !fromstat.IsSymlink() {
+		t.Fatalf("symlink %q, %q did not create symlink", to, from);
+	}
+	fromstat, err = Stat(from);
+	if err != nil {
+		t.Fatalf("stat %q failed: %v", from, err);
+	}
+	if !fromstat.FollowedSymlink {
+		t.Fatalf("stat %q did not follow symlink");
+	}
+	s, err := Readlink(from);
+	if err != nil {
+		t.Fatalf("readlink %q failed: %v", from, err);
+	}
+	if s != to {
+		t.Fatalf("after symlink %q != %q", s, to);
+	}
+	file, err = Open(from, O_RDONLY, 0);
+	if err != nil {
+		t.Fatalf("open %q failed: %v", from, err);
+	}
+	file.Close();
+}
+
+func TestLongSymlink(t *testing.T) {
+	s := "0123456789abcdef";
+	s = s + s + s + s + s + s + s + s + s + s + s + s + s + s + s + s + s;
+	from := "longsymlinktestfrom";
+	err := Symlink(s, from);
+	if err != nil {
+		t.Fatalf("symlink %q, %q failed: %v", s, from, err);
+	}
+	defer Remove(from);
+	r, err := Readlink(from);
+	if err != nil {
+		t.Fatalf("readlink %q failed: %v", from, err);
+	}
+	if r != s {
+		t.Fatalf("after symlink %q != %q", r, s);
+	}
+}
+
+func TestForkExec(t *testing.T) {
+	r, w, err := Pipe();
+	if err != nil {
+		t.Fatalf("Pipe: %v", err);
+	}
+	pid, err := ForkExec("/bin/pwd", []string{"pwd"}, nil, "/", []*File{nil, w, Stderr});
+	if err != nil {
+		t.Fatalf("ForkExec: %v", err);
+	}
+	w.Close();
+
+	var b io.ByteBuffer;
+	io.Copy(r, &b);
+	output := string(b.Data());
+	expect := "/\n";
+	if output != expect {
+		t.Errorf("exec /bin/pwd returned %q wanted %q", output, expect);
+	}
+	Wait(pid, 0);
+}
+
+func checkMode(t *testing.T, path string, mode uint32) {
+	dir, err := Stat(path);
+	if err != nil {
+		t.Fatalf("Stat %q (looking for mode %#o): %s", path, mode, err);
+	}
+	if dir.Mode & 0777 != mode {
+		t.Errorf("Stat %q: mode %#o want %#o", path, dir.Mode, 0777);
+	}
+}
+
+func TestChmod(t *testing.T) {
+	MkdirAll("_obj", 0777);
+	const Path = "_obj/_TestChmod_";
+	fd, err := Open(Path, O_WRONLY | O_CREAT, 0666);
+	if err != nil {
+		t.Fatalf("create %s: %s", Path, err);
+	}
+
+	if err = Chmod(Path, 0456); err != nil {
+		t.Fatalf("chmod %s 0456: %s", Path, err);
+	}
+	checkMode(t, Path, 0456);
+
+	if err = fd.Chmod(0123); err != nil {
+		t.Fatalf("fchmod %s 0123: %s", Path, err);
+	}
+	checkMode(t, Path, 0123);
+
+	fd.Close();
+	Remove(Path);
+}
+
+func checkUidGid(t *testing.T, path string, uid, gid int) {
+	dir, err := Stat(path);
+	if err != nil {
+		t.Fatalf("Stat %q (looking for uid/gid %#o/%#o): %s", path, uid, gid, err);
+	}
+	if dir.Uid != uint32(uid) {
+		t.Errorf("Stat %q: uid %#o want %#o", path, dir.Uid, uid);
+	}
+	if dir.Gid != uint32(gid) {
+		t.Errorf("Stat %q: gid %#o want %#o", path, dir.Gid, uid);
+	}
+}
+
+func TestChown(t *testing.T) {
+	// Use /tmp, not _obj, to make sure we're on a local file system,
+	// so that the group ids returned by Getgroups will be allowed
+	// on the file.  If _obj is on NFS, the Getgroups groups are
+	// basically useless.
+
+	const Path = "/tmp/_TestChown_";
+	fd, err := Open(Path, O_WRONLY | O_CREAT, 0666);
+	if err != nil {
+		t.Fatalf("create %s: %s", Path, err);
+	}
+	dir, err := fd.Stat();
+	if err != nil {
+		t.Fatalf("fstat %s: %s", Path, err);
+	}
+	defer fd.Close();
+	defer Remove(Path);
+
+	// Can't change uid unless root, but can try
+	// changing the group id.  First try our current group.
+	gid := Getgid();
+	if err = Chown(Path, -1, gid); err != nil {
+		t.Fatalf("chown %s -1 %d: %s", Path, gid, err);
+	}
+	checkUidGid(t, Path, int(dir.Uid), gid);
+
+	// Then try all the auxiliary groups.
+	groups, err := Getgroups();
+	if err != nil {
+		t.Fatalf("getgroups: %s", err);
+	}
+	for i, g := range groups {
+		if err = Chown(Path, -1, g); err != nil {
+			t.Fatalf("chown %s -1 %d: %s", Path, g, err);
+		}
+		checkUidGid(t, Path, int(dir.Uid), g);
+
+		// change back to gid to test fd.Chown
+		if err = fd.Chown(-1, gid); err != nil {
+			t.Fatalf("fchown %s -1 %d: %s", Path, gid, err);
+		}
+		checkUidGid(t, Path, int(dir.Uid), gid);
+	}
+}
+
+func checkSize(t *testing.T, path string, size uint64) {
+	dir, err := Stat(path);
+	if err != nil {
+		t.Fatalf("Stat %q (looking for size %d): %s", path, size, err);
+	}
+	if dir.Size != size {
+		t.Errorf("Stat %q: size %d want %d", path, dir.Size, size);
+	}
+}
+
+func TestTruncate(t *testing.T) {
+	MkdirAll("_obj", 0777);
+	const Path = "_obj/_TestTruncate_";
+	fd, err := Open(Path, O_WRONLY | O_CREAT, 0666);
+	if err != nil {
+		t.Fatalf("create %s: %s", Path, err);
+	}
+
+	checkSize(t, Path, 0);
+	fd.Write(io.StringBytes("hello, world\n"));
+	checkSize(t, Path, 13);
+	fd.Truncate(10);
+	checkSize(t, Path, 10);
+	fd.Truncate(1024);
+	checkSize(t, Path, 1024);
+	fd.Truncate(0);
+	checkSize(t, Path, 0);
+	fd.Write(io.StringBytes("surprise!"));
+	checkSize(t, Path, 13 + 9);	// wrote at offset past where hello, world was.
+	fd.Close();
+	Remove(Path);
+}
+
+func TestChdirAndGetwd(t *testing.T) {
+	fd, err := Open(".", O_RDONLY, 0);
+	if err != nil {
+		t.Fatalf("Open .: %s", err);
+	}
+	// These are chosen carefully not to be symlinks on a Mac
+	// (unlike, say, /var, /etc, and /tmp).
+	dirs := []string{ "/bin", "/", "/usr/local/bin" };
+	for mode := 0; mode < 2; mode++ {
+		for i, d := range dirs {
+			if mode == 0 {
+				err = Chdir(d);
+			} else {
+				fd1, err := Open(d, O_RDONLY, 0);
+				if err != nil {
+					t.Errorf("Open %s: %s", d, err);
+					continue;
+				}
+				err = fd1.Chdir();
+				fd1.Close();
+			}
+			pwd, err1 := Getwd();
+			err2 := fd.Chdir();
+			if err2 != nil {
+				// We changed the current directory and cannot go back.
+				// Don't let the tests continue; they'll scribble
+				// all over some other directory.
+				fmt.Fprintf(Stderr, "fchdir back to dot failed: %s\n", err2);
+				Exit(1);
+			}
+			if err != nil {
+				fd.Close();
+				t.Fatalf("Chdir %s: %s", d, err);
+			}
+			if err1 != nil {
+				fd.Close();
+				t.Fatalf("Getwd in %s: %s", d, err1);
+			}
+			if pwd != d {
+				fd.Close();
+				t.Fatalf("Getwd returned %q want %q", pwd, d);
+			}
+		}
+	}
+	fd.Close();
+}
+
+func TestTime(t *testing.T) {
+	// Just want to check that Time() is getting something.
+	// A common failure mode on Darwin is to get 0, 0,
+	// because it returns the time in registers instead of
+	// filling in the structure passed to the system call.
+	// TODO(rsc): Too bad the compiler doesn't know that
+	// 365.24*86400 is an integer.
+	sec, nsec, err := Time();
+	if sec < (2009-1970)*36524*864 {
+		t.Errorf("Time() = %d, %d, %s; not plausible", sec, nsec, err);
+	}
+}
+
+func TestSeek(t *testing.T) {
+	f, err := Open("_obj/seektest", O_CREAT|O_RDWR|O_TRUNC, 0666);
+	if err != nil {
+		t.Fatalf("open _obj/seektest: %s", err);
+	}
+
+	const data = "hello, world\n";
+	io.WriteString(f, data);
+
+	type test struct {
+		in int64;
+		whence int;
+		out int64;
+	}
+	var tests = []test {
+		test{ 0, 1, int64(len(data)) },
+		test{ 0, 0, 0 },
+		test{ 5, 0, 5 },
+		test{ 0, 2, int64(len(data)) },
+		test{ 0, 0, 0 },
+		test{ -1, 2, int64(len(data)) - 1 },
+		test{ 1<<40, 0, 1<<40 },
+		test{ 1<<40, 2, 1<<40 + int64(len(data)) }
+	};
+	for i, tt := range tests {
+		off, err := f.Seek(tt.in, tt.whence);
+		if off != tt.out || err != nil {
+			t.Errorf("#%d: Seek(%v, %v) = %v, %v want %v, nil", i, tt.in, tt.whence, off, err, tt.out);
+		}
+	}
+	f.Close();
+}