internal: remove sys package

This package is replaced by container/stub. Remove and replace it with unexported implementation for the upcoming test suite rewrite.

Signed-off-by: Ophestra <cat@gensokyo.uk>

3 files changed, 0 insertions, 208 deletions

diff --git a/internal/sys/hsu.go b/internal/sys/hsu.go
deleted file mode 100644
index 5ae12046..00000000
--- a/internal/sys/hsu.go
+++ /dev/null
@@ -1,88 +0,0 @@
-package sys
-
-import (
-	"errors"
-	"fmt"
-	"log"
-	"os"
-	"os/exec"
-	"strconv"
-	"sync"
-
-	"hakurei.app/container"
-	"hakurei.app/hst"
-	"hakurei.app/internal"
-	"hakurei.app/internal/hlog"
-)
-
-// Hsu caches responses from cmd/hsu.
-type Hsu struct {
-	idOnce sync.Once
-	idErr  error
-	id     int
-}
-
-var ErrHsuAccess = errors.New("current user is not in the hsurc file")
-
-// ID returns the current user hsurc identifier. ErrHsuAccess is returned if the current user is not in hsurc.
-func (h *Hsu) ID() (int, error) {
-	h.idOnce.Do(func() {
-		h.id = -1
-		hsuPath := internal.MustHsuPath()
-
-		cmd := exec.Command(hsuPath)
-		cmd.Path = hsuPath
-		cmd.Stderr = os.Stderr // pass through fatal messages
-		cmd.Env = make([]string, 0)
-		cmd.Dir = container.FHSRoot
-		var (
-			p         []byte
-			exitError *exec.ExitError
-		)
-
-		const step = "obtain uid from hsu"
-		if p, h.idErr = cmd.Output(); h.idErr == nil {
-			h.id, h.idErr = strconv.Atoi(string(p))
-			if h.idErr != nil {
-				h.idErr = &hst.AppError{Step: step, Err: h.idErr, Msg: "invalid uid string from hsu"}
-			}
-		} else if errors.As(h.idErr, &exitError) && exitError != nil && exitError.ExitCode() == 1 {
-			// hsu prints an error message in this case
-			h.idErr = &hst.AppError{Step: step, Err: ErrHsuAccess}
-		} else if os.IsNotExist(h.idErr) {
-			h.idErr = &hst.AppError{Step: step, Err: os.ErrNotExist,
-				Msg: fmt.Sprintf("the setuid helper is missing: %s", hsuPath)}
-		}
-	})
-
-	return h.id, h.idErr
-}
-
-func (h *Hsu) Uid(identity int) (int, error) {
-	id, err := h.ID()
-	if err == nil {
-		return 1000000 + id*10000 + identity, nil
-	}
-	return id, err
-}
-
-// MustUid calls [State.Uid] and terminates on error.
-func MustUid(s State, identity int) int {
-	uid, err := s.Uid(identity)
-	if err == nil {
-		return uid
-	}
-
-	const fallback = "cannot obtain uid from setuid wrapper:"
-	if errors.Is(err, ErrHsuAccess) {
-		hlog.Verbose("*"+fallback, err)
-		os.Exit(1)
-		return -0xdeadbeef
-	} else if m, ok := container.GetErrorMessage(err); ok {
-		log.Fatal(m)
-		return -0xdeadbeef
-	} else {
-		log.Fatalln(fallback, err)
-		return -0xdeadbeef
-	}
-}
diff --git a/internal/sys/interface.go b/internal/sys/interface.go
deleted file mode 100644
index f2465e62..00000000
--- a/internal/sys/interface.go
+++ /dev/null
@@ -1,76 +0,0 @@
-// Package sys wraps OS interaction library functions.
-package sys
-
-import (
-	"io/fs"
-	"log"
-	"os/user"
-	"strconv"
-
-	"hakurei.app/container"
-	"hakurei.app/hst"
-	"hakurei.app/internal/hlog"
-)
-
-// State provides safe interaction with operating system state.
-type State interface {
-	// Getuid provides [os.Getuid].
-	Getuid() int
-	// Getgid provides [os.Getgid].
-	Getgid() int
-	// LookupEnv provides [os.LookupEnv].
-	LookupEnv(key string) (string, bool)
-	// TempDir provides [os.TempDir].
-	TempDir() string
-	// LookPath provides exec.LookPath.
-	LookPath(file string) (string, error)
-	// MustExecutable provides [container.MustExecutable].
-	MustExecutable() string
-	// LookupGroup provides [user.LookupGroup].
-	LookupGroup(name string) (*user.Group, error)
-	// ReadDir provides [os.ReadDir].
-	ReadDir(name string) ([]fs.DirEntry, error)
-	// Stat provides [os.Stat].
-	Stat(name string) (fs.FileInfo, error)
-	// Open provides [os.Open].
-	Open(name string) (fs.File, error)
-	// EvalSymlinks provides filepath.EvalSymlinks.
-	EvalSymlinks(path string) (string, error)
-	// Exit provides [os.Exit].
-	Exit(code int)
-
-	Println(v ...any)
-	Printf(format string, v ...any)
-
-	// Paths returns a populated [hst.Paths] struct.
-	Paths() hst.Paths
-	// Uid invokes hsu and returns target uid.
-	// Any errors returned by Uid is already wrapped [hlog.BaseError].
-	Uid(identity int) (int, error)
-}
-
-// MustGetUserID obtains user id from hsu by querying uid of identity 0.
-func MustGetUserID(os State) int { return (MustUid(os, 0) / 10000) - 100 }
-
-// CopyPaths is a generic implementation of [hst.Paths].
-func CopyPaths(os State, v *hst.Paths, userid int) {
-	if tempDir, err := container.NewAbs(os.TempDir()); err != nil {
-		log.Fatalf("invalid TMPDIR: %v", err)
-	} else {
-		v.TempDir = tempDir
-	}
-
-	v.SharePath = v.TempDir.Append("hakurei." + strconv.Itoa(userid))
-	hlog.Verbosef("process share directory at %q", v.SharePath)
-
-	r, _ := os.LookupEnv(xdgRuntimeDir)
-	if a, err := container.NewAbs(r); err != nil {
-		// fall back to path in share since hakurei has no hard XDG dependency
-		v.RunDirPath = v.SharePath.Append("run")
-		v.RuntimePath = v.RunDirPath.Append("compat")
-	} else {
-		v.RuntimePath = a
-		v.RunDirPath = v.RuntimePath.Append("hakurei")
-	}
-	hlog.Verbosef("runtime directory at %q", v.RunDirPath)
-}
diff --git a/internal/sys/std.go b/internal/sys/std.go
deleted file mode 100644
index 11334c72..00000000
--- a/internal/sys/std.go
+++ /dev/null
@@ -1,44 +0,0 @@
-package sys
-
-import (
-	"io/fs"
-	"os"
-	"os/exec"
-	"os/user"
-	"path/filepath"
-	"sync"
-
-	"hakurei.app/container"
-	"hakurei.app/hst"
-	"hakurei.app/internal"
-	"hakurei.app/internal/hlog"
-)
-
-// Std implements System using the standard library.
-type Std struct {
-	paths     hst.Paths
-	pathsOnce sync.Once
-	Hsu
-}
-
-func (s *Std) Getuid() int                                  { return os.Getuid() }
-func (s *Std) Getgid() int                                  { return os.Getgid() }
-func (s *Std) LookupEnv(key string) (string, bool)          { return os.LookupEnv(key) }
-func (s *Std) TempDir() string                              { return os.TempDir() }
-func (s *Std) LookPath(file string) (string, error)         { return exec.LookPath(file) }
-func (s *Std) MustExecutable() string                       { return container.MustExecutable() }
-func (s *Std) LookupGroup(name string) (*user.Group, error) { return user.LookupGroup(name) }
-func (s *Std) ReadDir(name string) ([]os.DirEntry, error)   { return os.ReadDir(name) }
-func (s *Std) Stat(name string) (fs.FileInfo, error)        { return os.Stat(name) }
-func (s *Std) Open(name string) (fs.File, error)            { return os.Open(name) }
-func (s *Std) EvalSymlinks(path string) (string, error)     { return filepath.EvalSymlinks(path) }
-func (s *Std) Exit(code int)                                { internal.Exit(code) }
-func (s *Std) Println(v ...any)                             { hlog.Verbose(v...) }
-func (s *Std) Printf(format string, v ...any)               { hlog.Verbosef(format, v...) }
-
-const xdgRuntimeDir = "XDG_RUNTIME_DIR"
-
-func (s *Std) Paths() hst.Paths {
-	s.pathsOnce.Do(func() { CopyPaths(s, &s.paths, MustGetUserID(s)) })
-	return s.paths
-}