7e953d7483
When compiled to `GOOS=js`, wasm does not maintain the working directory: it is defined by the host. While not explicitly documented, `os.TestDirFSRootDir` in Go suggests the working directory must be valid to pass (literally the directory holding the file). This adds an experimental CLI flag that gives the initial working directory. This is experimental because while GOOS=js uses this, current WASI compilers will not, as they maintain working directory in code managed by wasi-libc, or as a convention (e.g. in Zig). It is not yet known if wasi-cli will maintain working directory externally or not. Signed-off-by: Adrian Cole <adrian@tetrate.io>
128 lines
3.9 KiB
Go
128 lines
3.9 KiB
Go
//go:build !windows
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package sysfs
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import (
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"fmt"
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"os"
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"path"
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"syscall"
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"testing"
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"github.com/tetratelabs/wazero/internal/platform"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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func TestDirFS_Chown(t *testing.T) {
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tmpDir := t.TempDir()
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testFS := NewDirFS(tmpDir)
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require.NoError(t, testFS.Mkdir("dir", 0o0777))
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dirF, err := testFS.OpenFile("dir", syscall.O_RDONLY, 0)
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require.NoError(t, err)
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dirStat, err := dirF.Stat()
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require.NoError(t, err)
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dirSys := dirStat.Sys().(*syscall.Stat_t)
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// Similar to TestChown in os_unix_test.go, we can't expect to change
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// owner unless root, and with another user. Instead, test gid.
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gid := os.Getgid()
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groups, err := os.Getgroups()
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require.NoError(t, err)
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t.Run("-1 parameters means leave alone", func(t *testing.T) {
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require.NoError(t, testFS.Chown("dir", -1, -1))
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, dirSys.Gid)
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})
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t.Run("change gid, but not uid", func(t *testing.T) {
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require.NoError(t, testFS.Chown("dir", -1, gid))
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, uint32(gid))
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})
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// Now, try any other groups of the current user.
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for _, g := range groups {
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g := g
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t.Run(fmt.Sprintf("change to gid %d", g), func(t *testing.T) {
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// Test using our Chown
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require.NoError(t, testFS.Chown("dir", -1, g))
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, uint32(g))
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// Revert back with platform.ChownFile
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require.NoError(t, platform.ChownFile(dirF, -1, gid))
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, uint32(gid))
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})
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}
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t.Run("not found", func(t *testing.T) {
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require.EqualErrno(t, syscall.ENOENT, testFS.Chown("a", -1, gid))
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})
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}
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func TestDirFS_Lchown(t *testing.T) {
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tmpDir := t.TempDir()
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testFS := NewDirFS(tmpDir)
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require.NoError(t, testFS.Mkdir("dir", 0o0777))
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dirF, err := testFS.OpenFile("dir", syscall.O_RDONLY, 0)
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require.NoError(t, err)
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dirStat, err := dirF.Stat()
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require.NoError(t, err)
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dirSys := dirStat.Sys().(*syscall.Stat_t)
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require.NoError(t, testFS.Symlink("dir", "link"))
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linkF, err := testFS.OpenFile("link", syscall.O_RDONLY, 0)
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require.NoError(t, err)
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linkStat, err := linkF.Stat()
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require.NoError(t, err)
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linkSys := linkStat.Sys().(*syscall.Stat_t)
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// Similar to TestLchown in os_unix_test.go, we can't expect to change
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// owner unless root, and with another user. Instead, test gid.
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gid := os.Getgid()
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groups, err := os.Getgroups()
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require.NoError(t, err)
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t.Run("-1 parameters means leave alone", func(t *testing.T) {
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require.NoError(t, testFS.Lchown("link", -1, -1))
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checkUidGid(t, path.Join(tmpDir, "link"), linkSys.Uid, linkSys.Gid)
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})
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t.Run("change gid, but not uid", func(t *testing.T) {
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require.NoError(t, testFS.Chown("dir", -1, gid))
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checkUidGid(t, path.Join(tmpDir, "link"), linkSys.Uid, uint32(gid))
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// Make sure the target didn't change.
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, dirSys.Gid)
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})
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// Now, try any other groups of the current user.
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for _, g := range groups {
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g := g
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t.Run(fmt.Sprintf("change to gid %d", g), func(t *testing.T) {
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// Test using our Lchown
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require.NoError(t, testFS.Lchown("link", -1, g))
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checkUidGid(t, path.Join(tmpDir, "link"), linkSys.Uid, uint32(g))
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// Make sure the target didn't change.
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checkUidGid(t, path.Join(tmpDir, "dir"), dirSys.Uid, dirSys.Gid)
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// Revert back with syscall.Lchown
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require.NoError(t, syscall.Lchown(path.Join(tmpDir, "link"), -1, gid))
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checkUidGid(t, path.Join(tmpDir, "link"), linkSys.Uid, uint32(gid))
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})
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}
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t.Run("not found", func(t *testing.T) {
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require.EqualErrno(t, syscall.ENOENT, testFS.Lchown("a", -1, gid))
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})
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}
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// checkUidGid uses lstat to ensure the comparison is against the file, not the
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// target of a symbolic link.
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func checkUidGid(t *testing.T, path string, uid, gid uint32) {
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ls, err := os.Lstat(path)
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require.NoError(t, err)
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sys := ls.Sys().(*syscall.Stat_t)
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require.Equal(t, uid, sys.Uid)
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require.Equal(t, gid, sys.Gid)
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}
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