From 42f8733fc7c3fe23543d9da258b7ec91e11c9a63 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Wed, 28 Feb 2024 01:17:48 +0200
Subject: no need of debugfs package.

older kernels may not have some of the tracepoints.
---
 internal/debugfs/debugfs.go | 57 ---------------------------------------------
 1 file changed, 57 deletions(-)
 delete mode 100644 internal/debugfs/debugfs.go

(limited to 'internal/debugfs')

diff --git a/internal/debugfs/debugfs.go b/internal/debugfs/debugfs.go
deleted file mode 100644
index 80ac436..0000000
--- a/internal/debugfs/debugfs.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package debugfs
-
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-// Return tracepoints with 'unsigned int fd', which are I/O tracepoints on FDs
-func TracepointsWithFd() ([]string, error) {
-	return tracepointsWith("unsigned int fd")
-}
-
-func tracepointsWith(field string) ([]string, error) {
-	var tracepoints []string
-
-	matches, err := filepath.Glob("/sys/kernel/debug/tracing/events/syscalls/*/format")
-	if err != nil {
-		return tracepoints, err
-	}
-	if len(matches) == 0 {
-		return tracepoints, fmt.Errorf("Unable to gather tracepoints with FDs")
-	}
-
-	for _, formatPath := range matches {
-		has, err := hasField(formatPath, field)
-		if err != nil {
-			return tracepoints, err
-		}
-		if !has {
-			continue
-		}
-		tracepoints = append(tracepoints, filepath.Base(filepath.Dir(formatPath)))
-	}
-
-	return tracepoints, nil
-}
-
-func hasField(formatPath, field string) (bool, error) {
-	file, err := os.Open(formatPath)
-	if err != nil {
-		return false, err
-	}
-	defer file.Close()
-
-	scanner := bufio.NewScanner(file)
-	for scanner.Scan() {
-		line := scanner.Text()
-		if strings.Contains(line, fmt.Sprintf("field:%s;", field)) {
-			return true, nil
-		}
-	}
-
-	return false, nil
-}
-- 
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