bastion 0.60.0

client-go/agentsession_linux.go

@@ -0,0 +1,53 @@
+//go:build linux
+
+package main
+
+import (
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func osProcCwd(pid int) string {
+	d, err := os.Readlink("/proc/" + strconv.Itoa(pid) + "/cwd")
+	if err != nil {
+		return ""
+	}
+	return d
+}
+
+func osProcCmdArgs(pid int) []string {
+	raw, err := os.ReadFile("/proc/" + strconv.Itoa(pid) + "/cmdline")
+	if err != nil {
+		return nil
+	}
+	return splitNul(raw)
+}
+
+// osProcStarted is the process's start: boot time (/proc/stat btime) plus its
+// start in clock ticks (procIdentity), at the USER_HZ of 100 Linux reports.
+func osProcStarted(pid int) (time.Time, bool) {
+	id, _, ok := procIdentity(pid)
+	if !ok {
+		return time.Time{}, false
+	}
+	ticks, err := strconv.ParseInt(id, 10, 64)
+	if err != nil {
+		return time.Time{}, false
+	}
+	raw, err := os.ReadFile("/proc/stat")
+	if err != nil {
+		return time.Time{}, false
+	}
+	for _, line := range strings.Split(string(raw), "\n") {
+		if v, ok := strings.CutPrefix(line, "btime "); ok {
+			boot, err := strconv.ParseInt(strings.TrimSpace(v), 10, 64)
+			if err != nil {
+				return time.Time{}, false
+			}
+			return time.Unix(boot, 0).Add(time.Duration(ticks) * 10 * time.Millisecond), true
+		}
+	}
+	return time.Time{}, false
+}