70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
package linux
|
|
|
|
import (
|
|
"io/fs"
|
|
"os/user"
|
|
"path"
|
|
"strconv"
|
|
|
|
"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)
|
|
|
|
// FshimPath returns an absolute path to the fshim binary.
|
|
FshimPath() string
|
|
// 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)
|
|
}
|