More reliable and clear random prefix

[goredo.git] / run.go

diff --git a/run.go b/run.go
index 44d25d55045943eafcc873831444915ae458b404..8cb6017d7d5ee3547a9bb0fd59d8a180135fa0c8 100644 (file)
--- a/run.go
+++ b/run.go
@@ -21,6 +21,8 @@ package main
 
 import (
        "bufio"
+       "crypto/rand"
+       "encoding/hex"
        "errors"
        "flag"
        "fmt"
@@ -402,7 +404,11 @@ func runScript(tgtOrig string, errs chan error, traced bool) error {
        cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", EnvDirPrefix, dirPrefix))
        cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", EnvBuildUUID, BuildUUID))
 
-       childStderrPrefix := tempsuffix()
+       childStderrPrefixRaw := make([]byte, 8)
+       if _, err = io.ReadFull(rand.Reader, childStderrPrefixRaw); err != nil {
+               panic(err)
+       }
+       childStderrPrefix := hex.EncodeToString(childStderrPrefixRaw)
        cmd.Env = append(cmd.Env, fmt.Sprintf(
                "%s=%s", EnvStderrPrefix, childStderrPrefix,
        ))