Function to create symlinks atomically

tools/utils/shm/shm.go

@@ -3,16 +3,12 @@
 package shm
 
 import (
-	"crypto/rand"
-	"encoding/base32"
 	"encoding/binary"
 	"errors"
 	"fmt"
 	"io"
 	"io/fs"
-	not_rand "math/rand"
 	"os"
-	"strconv"
 	"strings"
 
 	"kitty/tools/cli"
@@ -48,15 +44,6 @@ func prefix_and_suffix(pattern string) (prefix, suffix string, err error) {
 	return prefix, suffix, nil
 }
 
-func next_random() string {
-	b := make([]byte, 8)
-	_, err := rand.Read(b)
-	if err != nil {
-		return strconv.FormatUint(uint64(not_rand.Uint32()), 16)
-	}
-	return base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(b)
-}
-
 type MMap interface {
 	Close() error
 	Unlink() error

tools/utils/shm/shm_fs.go

@@ -8,10 +8,11 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
-	"kitty/tools/utils"
 	"os"
 	"path/filepath"
 	"runtime"
+
+	"kitty/tools/utils"
 )
 
 var _ = fmt.Print
@@ -96,7 +97,7 @@ func create_temp(pattern string, size uint64) (ans MMap, err error) {
 	var f *os.File
 	try := 0
 	for {
-		name := prefix + next_random() + suffix
+		name := prefix + utils.RandomFilename() + suffix
 		path := file_path_from_name(name)
 		f, err = os.OpenFile(path, os.O_EXCL|os.O_CREATE|os.O_RDWR, 0600)
 		if err != nil {

tools/utils/shm/shm_syscall.go

@@ -11,6 +11,8 @@ import (
 	"strings"
 	"unsafe"
 
+	"kitty/tools/utils"
+
 	"golang.org/x/sys/unix"
 )
 
@@ -127,7 +129,7 @@ func create_temp(pattern string, size uint64) (ans MMap, err error) {
 	var f *os.File
 	try := 0
 	for {
-		name := prefix + next_random() + suffix
+		name := prefix + utils.RandomFilename() + suffix
 		if len(name) > SHM_NAME_MAX {
 			return nil, ErrPatternTooLong
 		}