GetProcessPIDs was renamed to IsProcessRuns and now finds just first occurance of a process.

process_unix.go

@@ -5,36 +5,28 @@ package main
 
 import (
 	"os"
-	"strconv"
 	"strings"
 )
 
-// GetProcessPIDs returns a list of PIDs found for a process.
-func GetProcessPIDs(name string) (pids []int, err error) {
+// IsProcessRuns returns true if there is a process with a given name in cmdline.
+func IsProcessRuns(name string) (bool, error) {
 	dir, err := os.ReadDir("/proc/")
 	if err != nil {
-		return nil, err
+		return false, err
 	}
 
 	for _, entry := range dir {
-		// This line demands a little clarification. Here we are making sure
-		// that the first character of a directory name is numeric. In ASCII
-		// all numerals are laying within 0x30-0x39 range.
 		if entry.IsDir() && entry.Name()[0]>>0x4&0xf == 0x3 {
 			cmdline, err := os.ReadFile("/proc/" + entry.Name() + "/cmdline")
 			if err != nil {
-				return nil, err
+				return false, err
 			}
 
 			if strings.Contains(string(cmdline), name) {
-				pid, err := strconv.Atoi(entry.Name())
-				if err != nil {
-					continue
-				}
-				pids = append(pids, pid)
+				return true, nil
 			}
 		}
 	}
 
-	return pids, nil
+	return false, nil
 }