prevent active log from being overwritten when agent starts (#11386)

command/agent/log_file_linux.go

@@ -0,0 +1,17 @@
+//go:build dragonfly || linux || solaris
+// +build dragonfly linux solaris
+
+package agent
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+func (l *logFile) createTime(stat os.FileInfo) time.Time {
+	stat_t := stat.Sys().(*syscall.Stat_t)
+	createTime := stat_t.Ctim
+	// Sec and Nsec are int32 in 32-bit architectures.
+	return time.Unix(int64(createTime.Sec), int64(createTime.Nsec)) //nolint:unconvert
+}