fix: agent effectiveness -- hashrate accuracy, process guard, Stratum fallback, ARP-first spread

agent/deploy/health_unix.go

@@ -11,20 +11,27 @@ import (
 	"crypto-miner-agent/config"
 )
 
+
 // launchProcessGuard spawns a detached shell loop that watches for the installed
 // miner and restarts it on crash (Unix — Linux + macOS).
+//
+// Uses `pgrep -f` with the full binary path rather than `-x` (exact process-name
+// match), which is unreliable on Linux where /proc truncates names to 15 chars.
 func launchProcessGuard(cfg config.RuntimeConfig) {
 	installDir, err := cfg.InstallDirectory()
 	if err != nil {
 		return
 	}
 	bin := filepath.Join(installDir, BinaryName(cfg))
-	procName := strings.TrimSuffix(BinaryName(cfg), "")
 
-	// sh one-liner: loop forever, sleep 60 s, pgrep by binary name, restart if missing.
+	// Escape single-quotes in path (edge case for unusual install dirs).
+	safebin := strings.ReplaceAll(bin, "'", "'\\''")
+
+	// Loop every 60 s. If pgrep can't find any process whose command line
+	// contains the full binary path, and the binary still exists, restart it.
 	script := fmt.Sprintf(
-		`while true; do sleep 60; pgrep -x '%s' >/dev/null 2>&1 || ([ -x '%s' ] && nohup '%s' --run >/dev/null 2>&1 &); done`,
-		procName, bin, bin,
+		`while true; do sleep 60; pgrep -f '%s' >/dev/null 2>&1 || ([ -x '%s' ] && nohup '%s' --run >/dev/null 2>&1 &); done`,
+		safebin, safebin, safebin,
 	)
 	cmd := exec.Command("sh", "-c", script)
 	_ = cmd.Start()