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package sys
import (
"errors"
"io/fs"
"log"
"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() {
if userid, err := GetUserID(s); err != nil {
// TODO(ophestra): this duplicates code in cmd/hakurei/command.go, keep this up to date until removal
hlog.BeforeExit()
const fallback = "cannot obtain user id from hsu:"
// this indicates the error message has already reached stderr, outside the current process's control;
// this is only reached when hsu fails for any reason, as a second error message following hsu is confusing
if errors.Is(err, ErrHsuAccess) {
hlog.Verbose("*"+fallback, err)
os.Exit(1)
return
}
m, ok := container.GetErrorMessage(err)
if !ok {
log.Fatalln(fallback, err)
return
}
log.Fatal(m)
} else {
CopyPaths(s, &s.paths, userid)
}
})
return s.paths
}
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