cmd: shim and init into separate binaries

This change also fixes a deadlock when shim fails to connect and complete the setup.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

1 files changed, 0 insertions, 126 deletions

diff --git a/internal/system.go b/internal/system.go
deleted file mode 100644
index 3e973b56..00000000
--- a/internal/system.go
+++ /dev/null
@@ -1,126 +0,0 @@
-package internal
-
-import (
-	"errors"
-	"io/fs"
-	"os"
-	"os/exec"
-	"os/user"
-	"path"
-	"strconv"
-	"sync"
-
-	"git.ophivana.moe/security/fortify/internal/fmsg"
-)
-
-// System provides safe access to operating system resources.
-type System interface {
-	// Geteuid provides [os.Geteuid].
-	Geteuid() 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)
-	// Executable provides [os.Executable].
-	Executable() (string, error)
-	// Lookup provides [user.Lookup].
-	Lookup(username string) (*user.User, 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)
-	// Exit provides [os.Exit].
-	Exit(code int)
-
-	// Paths returns a populated [Paths] struct.
-	Paths() Paths
-	// SdBooted implements https://www.freedesktop.org/software/systemd/man/sd_booted.html
-	SdBooted() bool
-}
-
-// Paths contains environment dependent paths used by fortify.
-type Paths struct {
-	// path to shared directory e.g. /tmp/fortify.%d
-	SharePath string `json:"share_path"`
-	// XDG_RUNTIME_DIR value e.g. /run/user/%d
-	RuntimePath string `json:"runtime_path"`
-	// application runtime directory e.g. /run/user/%d/fortify
-	RunDirPath string `json:"run_dir_path"`
-}
-
-// CopyPaths is a generic implementation of [System.Paths].
-func CopyPaths(os System, v *Paths) {
-	v.SharePath = path.Join(os.TempDir(), "fortify."+strconv.Itoa(os.Geteuid()))
-
-	fmsg.VPrintf("process share directory at %q", v.SharePath)
-
-	if r, ok := os.LookupEnv(xdgRuntimeDir); !ok || r == "" || !path.IsAbs(r) {
-		// fall back to path in share since fortify has no hard XDG dependency
-		v.RunDirPath = path.Join(v.SharePath, "run")
-		v.RuntimePath = path.Join(v.RunDirPath, "compat")
-	} else {
-		v.RuntimePath = r
-		v.RunDirPath = path.Join(v.RuntimePath, "fortify")
-	}
-
-	fmsg.VPrintf("runtime directory at %q", v.RunDirPath)
-}
-
-// Std implements System using the standard library.
-type Std struct {
-	paths     Paths
-	pathsOnce sync.Once
-
-	sdBooted     bool
-	sdBootedOnce sync.Once
-}
-
-func (s *Std) Geteuid() int                               { return os.Geteuid() }
-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) Executable() (string, error)                { return os.Executable() }
-func (s *Std) Lookup(username string) (*user.User, error) { return user.Lookup(username) }
-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) Exit(code int)                              { fmsg.Exit(code) }
-
-const xdgRuntimeDir = "XDG_RUNTIME_DIR"
-
-func (s *Std) Paths() Paths {
-	s.pathsOnce.Do(func() { CopyPaths(s, &s.paths) })
-	return s.paths
-}
-
-func (s *Std) SdBooted() bool {
-	s.sdBootedOnce.Do(func() { s.sdBooted = copySdBooted() })
-	return s.sdBooted
-}
-
-const systemdCheckPath = "/run/systemd/system"
-
-func copySdBooted() bool {
-	if v, err := sdBooted(); err != nil {
-		fmsg.Println("cannot read systemd marker:", err)
-		return false
-	} else {
-		return v
-	}
-}
-
-func sdBooted() (bool, error) {
-	_, err := os.Stat(systemdCheckPath)
-	if err != nil {
-		if errors.Is(err, fs.ErrNotExist) {
-			err = nil
-		}
-		return false, err
-	}
-
-	return true, nil
-}