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package app
import (
"bytes"
"encoding/base64"
"encoding/gob"
"fmt"
"os"
"strings"
"syscall"
"git.ophivana.moe/cat/fortify/internal/state"
"git.ophivana.moe/cat/fortify/internal/system"
"git.ophivana.moe/cat/fortify/internal/util"
)
const (
sudoAskPass = "SUDO_ASKPASS"
launcherPayload = "FORTIFY_LAUNCHER_PAYLOAD"
)
func (a *App) launcherPayloadEnv() string {
r := &bytes.Buffer{}
enc := base64.NewEncoder(base64.StdEncoding, r)
if err := gob.NewEncoder(enc).Encode(a.command); err != nil {
state.Fatal("Error encoding launcher payload:", err)
}
_ = enc.Close()
return launcherPayload + "=" + r.String()
}
// Early hidden launcher path
func Early(printVersion bool) {
if printVersion {
if r, ok := os.LookupEnv(launcherPayload); ok {
dec := base64.NewDecoder(base64.StdEncoding, strings.NewReader(r))
var argv []string
if err := gob.NewDecoder(dec).Decode(&argv); err != nil {
fmt.Println("Error decoding launcher payload:", err)
os.Exit(1)
}
if err := os.Unsetenv(launcherPayload); err != nil {
fmt.Println("Error unsetting launcher payload:", err)
// not fatal, do not fail
}
var p string
if len(argv) > 0 {
if p, ok = util.Which(argv[0]); !ok {
fmt.Printf("Did not find '%s' in PATH\n", argv[0])
os.Exit(1)
}
} else {
if p, ok = os.LookupEnv("SHELL"); !ok {
fmt.Println("No command was specified and $SHELL was unset")
os.Exit(1)
}
argv = []string{p}
}
if err := syscall.Exec(p, argv, os.Environ()); err != nil {
fmt.Println("Error executing launcher payload:", err)
os.Exit(1)
}
// unreachable
os.Exit(1)
return
}
}
}
func (a *App) launchBySudo() (args []string) {
args = make([]string, 0, 4+len(a.env)+len(a.command))
// -Hiu $USER
args = append(args, "-Hiu", a.Username)
// -A?
if _, ok := os.LookupEnv(sudoAskPass); ok {
if system.V.Verbose {
fmt.Printf("%s set, adding askpass flag\n", sudoAskPass)
}
args = append(args, "-A")
}
// environ
args = append(args, a.env...)
// -- $@
args = append(args, "--")
args = append(args, a.command...)
return
}
func (a *App) launchByMachineCtl(bare bool) (args []string) {
args = make([]string, 0, 9+len(a.env))
// shell --uid=$USER
args = append(args, "shell", "--uid="+a.Username)
// --quiet
if !system.V.Verbose {
args = append(args, "--quiet")
}
// environ
envQ := make([]string, len(a.env)+1)
for i, e := range a.env {
envQ[i] = "-E" + e
}
envQ[len(a.env)] = "-E" + a.launcherPayloadEnv()
args = append(args, envQ...)
// -- .host
args = append(args, "--", ".host")
// /bin/sh -c
if sh, ok := util.Which("sh"); !ok {
state.Fatal("Did not find 'sh' in PATH")
} else {
args = append(args, sh, "-c")
}
if len(a.command) == 0 { // execute shell if command is not provided
a.command = []string{"$SHELL"}
}
innerCommand := strings.Builder{}
if !bare {
innerCommand.WriteString("dbus-update-activation-environment --systemd")
for _, e := range a.env {
innerCommand.WriteString(" " + strings.SplitN(e, "=", 2)[0])
}
innerCommand.WriteString("; systemctl --user start xdg-desktop-portal-gtk; ")
}
if executable, err := os.Executable(); err != nil {
state.Fatal("Error reading executable path:", err)
} else {
innerCommand.WriteString("exec " + executable + " -V")
}
args = append(args, innerCommand.String())
return
}
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