Set fdmax by default not as an option

cmd/subfinder/main.go

@@ -3,11 +3,18 @@ package main
 import (
 	"context"
 
+	"github.com/projectdiscovery/fdmax"
 	"github.com/projectdiscovery/gologger"
 	"github.com/projectdiscovery/subfinder/pkg/runner"
 )
 
 func main() {
+	// Increase the OS file descriptors
+	err := fdmax.Set(fdmax.UnixMax)
+	if err != nil {
+		gologger.Fatalf("Could not set the max file descriptors for the current process: %s\n", err)
+	}
+
 	// Parse the command line flags and read config files
 	options := runner.ParseOptions()
 

pkg/runner/options.go

@@ -23,7 +23,6 @@ type Options struct {
 	RemoveWildcard     bool   // RemoveWildcard specifies whether to remove potential wildcard or dead subdomains from the results.
 	Stdin              bool   // Stdin specifies whether stdin input was given to the process
 	Version            bool   // Version specifies if we should just show version and exit
-	FdMax              bool   // FdMax automatically increases the maximum number of file descriptors
 	Recursive          bool   // Recursive specifies whether to use only recursive subdomain enumeration sources
 	All                bool   // All specifies whether to use all (slow) sources.
 	Threads            int    // Thread controls the number of threads to use for active enumerations
@@ -76,7 +75,6 @@ func ParseOptions() *Options {
 	flag.BoolVar(&options.RemoveWildcard, "nW", false, "Remove Wildcard & Dead Subdomains from output")
 	flag.StringVar(&options.ConfigFile, "config", path.Join(config, "config.yaml"), "Configuration file for API Keys, etc")
 	flag.BoolVar(&options.Version, "version", false, "Show version of subfinder")
-	flag.BoolVar(&options.FdMax, "fdmax", false, "Automatically increases the maximum number of file descriptors")
 	flag.Parse()
 
 	// Check if stdin pipe was given

pkg/runner/runner.go

@@ -7,7 +7,6 @@ import (
 	"os"
 	"path"
 
-	"github.com/projectdiscovery/fdmax"
 	"github.com/projectdiscovery/subfinder/pkg/passive"
 	"github.com/projectdiscovery/subfinder/pkg/resolve"
 )
@@ -40,13 +39,6 @@ func NewRunner(options *Options) (*Runner, error) {
 
 // RunEnumeration runs the subdomain enumeration flow on the targets specified
 func (r *Runner) RunEnumeration(ctx context.Context) error {
-	// Increase the OS file descriptors
-	if r.options.FdMax {
-		err := fdmax.Set(fdmax.UnixMax)
-		if err != nil {
-			return err
-		}
-	}
 
 	// Check if only a single domain is sent as input. Process the domain now.
 	if r.options.Domain != "" {