state/print: collect and output state information of all users

The -state flag now outputs state of all users. The old behaviour can be accessed via the -state-current flag, user is selected via -u.

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

1 files changed, 104 insertions, 0 deletions

diff --git a/internal/state/print.go b/internal/state/print.go
new file mode 100644
index 00000000..6610ada2
--- /dev/null
+++ b/internal/state/print.go
@@ -0,0 +1,104 @@
+package state
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"text/tabwriter"
+
+	"git.ophivana.moe/cat/fortify/internal/system"
+)
+
+var (
+	stateActionEarly  bool
+	stateActionEarlyC bool
+)
+
+func init() {
+	flag.BoolVar(&stateActionEarly, "state", false, "print state information of active launchers")
+	flag.BoolVar(&stateActionEarlyC, "state-current", false, "print state information of active launchers for the specified user")
+}
+
+func Early() {
+	var w *tabwriter.Writer
+
+	switch {
+	case stateActionEarly:
+		if runDir, err := os.ReadDir(system.V.RunDir); err != nil {
+			fmt.Println("Error reading runtime directory:", err)
+		} else {
+			for _, e := range runDir {
+				if !e.IsDir() {
+					if system.V.Verbose {
+						fmt.Println("Skipped non-directory entry", e.Name())
+					}
+					continue
+				}
+
+				if _, err = strconv.Atoi(e.Name()); err != nil {
+					if system.V.Verbose {
+						fmt.Println("Skipped non-uid entry", e.Name())
+					}
+					continue
+				}
+
+				printLauncherState(e.Name(), &w)
+			}
+		}
+	case stateActionEarlyC:
+		printLauncherState(u.Uid, &w)
+	default:
+		return
+	}
+
+	if w != nil {
+		if err := w.Flush(); err != nil {
+			fmt.Println("warn: error formatting output:", err)
+		}
+	} else {
+		fmt.Println("No information available.")
+	}
+
+	os.Exit(0)
+}
+
+func printLauncherState(uid string, w **tabwriter.Writer) {
+	launchers, err := readLaunchers(uid)
+	if err != nil {
+		fmt.Println("Error reading launchers:", err)
+		os.Exit(1)
+	}
+
+	if *w == nil {
+		*w = tabwriter.NewWriter(os.Stdout, 0, 1, 4, ' ', 0)
+
+		if !system.V.Verbose {
+			_, _ = fmt.Fprintln(*w, "\tUID\tPID\tEnablements\tLauncher\tCommand")
+		} else {
+			_, _ = fmt.Fprintln(*w, "\tUID\tPID\tArgv")
+		}
+	}
+
+	for _, state := range launchers {
+		enablementsDescription := strings.Builder{}
+		for i := Enablement(0); i < enableLength; i++ {
+			if state.Capability.Has(i) {
+				enablementsDescription.WriteString(", " + i.String())
+			}
+		}
+		if enablementsDescription.Len() == 0 {
+			enablementsDescription.WriteString("none")
+		}
+
+		if !system.V.Verbose {
+			_, _ = fmt.Fprintf(*w, "\t%s\t%d\t%s\t%s\t%s\n",
+				uid, state.PID, strings.TrimPrefix(enablementsDescription.String(), ", "), state.Launcher,
+				state.Command)
+		} else {
+			_, _ = fmt.Fprintf(*w, "\t%s\t%d\t%s\n",
+				uid, state.PID, state.Argv)
+		}
+	}
+}