Add MacOS support

daemon/2server-pidToPath-Darwin.go

@@ -0,0 +1,18 @@
+//go:build darwin
+
+package daemon
+
+import (
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+// pidToPath returns the path of the executable that has the given PID.
+func pidToPath(pid int) string {
+	pidString := strconv.Itoa(pid)
+	cmd := exec.Command("lsof", "-a", "-dtxt", "-p"+pidString)
+	output, _ := cmd.Output()
+	line := strings.Split(string(output), "\n")[1]
+	return line[strings.Index(line, "/"):]
+}

daemon/2server-pidToPath-Readlink.go

@@ -0,0 +1,14 @@
+//go:build linux || freebsd
+
+package daemon
+
+import (
+	"fmt"
+	"os"
+)
+
+// pidToPath returns the path of the executable that has the given PID.
+func pidToPath(pid int) string {
+	path, _ := os.Readlink(fmt.Sprintf("/proc/%d/"+pidPathFile, pid))
+	return path
+}

daemon/2server.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"errors"
-	"fmt"
 	"io"
 	"log"
 	"net"
@@ -97,12 +96,6 @@ func handleConn(conn net.Conn) {
 	}
 }
 
-// pidToPath returns the path of the executable that has the given PID.
-func pidToPath(pid int) string {
-	path, _ := os.Readlink(fmt.Sprintf("/proc/%d/"+pidPathFile, pid))
-	return path
-}
-
 // getFileHash returns the SHA256 hash of the file at the given path.
 func getFileHash(path string) []byte {
 	file, _ := os.Open(path)