Merge pull request #1364 from safing/feature/unix-tag-improvements

Improve unix process matching tags

process/tags/appimage_unix.go

@@ -1,8 +1,13 @@
 package tags
 
 import (
+	"bufio"
+	"bytes"
+	"os"
+	"regexp"
 	"strings"
 
+	"github.com/safing/portbase/log"
 	"github.com/safing/portbase/utils/osdetail"
 	"github.com/safing/portmaster/process"
 	"github.com/safing/portmaster/profile"
@@ -18,6 +23,12 @@ func init() {
 const (
 	appImageName          = "AppImage"
 	appImagePathTagKey    = "app-image-path"
+	appImageMountIDTagKey = "app-image-mount-id"
+)
+
+var (
+	appImageMountDirRegex         = regexp.MustCompile(`^/tmp/.mount_[^/]+`)
+	appImageMountNameExtractRegex = regexp.MustCompile(`^[A-Za-z0-9]+`)
 )
 
 // AppImageHandler handles AppImage processes on Unix systems.
@@ -37,18 +48,25 @@ func (h *AppImageHandler) TagDescriptions() []process.TagDescription {
 			Name:        "AppImage Path",
 			Description: "Path to the app image file itself.",
 		},
+		{
+			ID:          appImageMountIDTagKey,
+			Name:        "AppImage Mount ID",
+			Description: "Extracted ID from the AppImage mount name. Use AppImage Path instead, if available.",
+		},
 	}
 }
 
 // AddTags adds tags to the given process.
 func (h *AppImageHandler) AddTags(p *process.Process) {
+	// Detect app image path via ENV vars.
+	func() {
 		// Get and verify AppImage location.
 		appImageLocation, ok := p.Env["APPIMAGE"]
-	if !ok {
+		if !ok || appImageLocation == "" {
 			return
 		}
 		appImageMountDir, ok := p.Env["APPDIR"]
-	if !ok {
+		if !ok || appImageMountDir == "" {
 			return
 		}
 		// Check if the process path is in the mount dir.
@@ -59,11 +77,45 @@ func (h *AppImageHandler) AddTags(p *process.Process) {
 		// Add matching path for regular profile matching.
 		p.MatchingPath = appImageLocation
 
-	// Add app image tags.
+		// Add app image tag.
 		p.Tags = append(p.Tags, profile.Tag{
 			Key:   appImagePathTagKey,
 			Value: appImageLocation,
 		})
+	}()
+
+	// Detect app image mount point.
+	func() {
+		// Check if binary path matches app image mount pattern.
+		mountDir := appImageMountDirRegex.FindString(p.Path)
+		if mountDir == "" {
+			return
+		}
+
+		// Get mount name of mount dir.
+		// Also, this confirm this is actually a mounted dir.
+		mountName, err := getAppImageMountName(mountDir)
+		if err != nil {
+			log.Debugf("process/tags: failed to get mount name: %s", err)
+			return
+		}
+		if mountName == "" {
+			return
+		}
+
+		// Extract a usable ID from the mount name.
+		mountName, _ = strings.CutPrefix(mountName, "gearlever_")
+		mountName = appImageMountNameExtractRegex.FindString(mountName)
+		if mountName == "" {
+			return
+		}
+
+		// Add app image tag.
+		p.Tags = append(p.Tags, profile.Tag{
+			Key:   appImageMountIDTagKey,
+			Value: mountName,
+		})
+	}()
 }
 
 // CreateProfile creates a profile based on the tags of the process.
@@ -72,12 +124,13 @@ func (h *AppImageHandler) CreateProfile(p *process.Process) *profile.Profile {
 	if tag, ok := p.GetTag(appImagePathTagKey); ok {
 		return profile.New(&profile.Profile{
 			Source:              profile.SourceLocal,
-			Name:                osdetail.GenerateBinaryNameFromPath(tag.Value),
+			Name:                osdetail.GenerateBinaryNameFromPath(p.Path),
 			PresentationPath:    p.Path,
 			UsePresentationPath: true,
 			Fingerprints: []profile.Fingerprint{
 				{
-					Type:      profile.FingerprintTypePathID,
+					Type:      profile.FingerprintTypeTagID,
+					Key:       tag.Key,
 					Operation: profile.FingerprintOperationEqualsID,
 					Value:     tag.Value, // Value of appImagePathTagKey.
 				},
@@ -85,5 +138,49 @@ func (h *AppImageHandler) CreateProfile(p *process.Process) *profile.Profile {
 		})
 	}
 
+	if tag, ok := p.GetTag(appImageMountIDTagKey); ok {
+		return profile.New(&profile.Profile{
+			Source:              profile.SourceLocal,
+			Name:                osdetail.GenerateBinaryNameFromPath(p.Path),
+			PresentationPath:    p.Path,
+			UsePresentationPath: true,
+			Fingerprints: []profile.Fingerprint{
+				{
+					Type:      profile.FingerprintTypeTagID,
+					Key:       tag.Key,
+					Operation: profile.FingerprintOperationEqualsID,
+					Value:     tag.Value, // Value of appImageMountIDTagKey.
+				},
+			},
+		})
+	}
+
 	return nil
 }
+
+func getAppImageMountName(mountPoint string) (mountName string, err error) {
+	// Get mounts.
+	data, err := os.ReadFile("/proc/mounts")
+	if err != nil {
+		return "", err
+	}
+
+	scanner := bufio.NewScanner(bytes.NewReader(data))
+	for scanner.Scan() {
+		fields := strings.Fields(scanner.Text())
+		if len(fields) >= 2 {
+			switch {
+			case fields[1] != mountPoint:
+			case !strings.HasSuffix(strings.ToLower(fields[0]), ".appimage"):
+			default:
+				// Found AppImage mount!
+				return fields[0], nil
+			}
+		}
+	}
+	if scanner.Err() != nil {
+		return "", scanner.Err()
+	}
+
+	return "", nil
+}

process/tags/flatpak_unix.go

@@ -0,0 +1,87 @@
+package tags
+
+import (
+	"strings"
+
+	"github.com/safing/portbase/utils/osdetail"
+	"github.com/safing/portmaster/process"
+	"github.com/safing/portmaster/profile"
+)
+
+func init() {
+	err := process.RegisterTagHandler(new(flatpakHandler))
+	if err != nil {
+		panic(err)
+	}
+}
+
+const (
+	flatpakName     = "Flatpak"
+	flatpakIDTagKey = "flatpak-id"
+)
+
+// flatpakHandler handles flatpak processes on Unix systems.
+type flatpakHandler struct{}
+
+// Name returns the tag handler name.
+func (h *flatpakHandler) Name() string {
+	return flatpakName
+}
+
+// TagDescriptions returns a list of all possible tags and their description
+// of this handler.
+func (h *flatpakHandler) TagDescriptions() []process.TagDescription {
+	return []process.TagDescription{
+		{
+			ID:          flatpakIDTagKey,
+			Name:        "Flatpak ID",
+			Description: "ID of the flatpak.",
+		},
+	}
+}
+
+// AddTags adds tags to the given process.
+func (h *flatpakHandler) AddTags(p *process.Process) {
+	// Check if binary lives in the /app space.
+	if !strings.HasPrefix(p.Path, "/app/") {
+		return
+	}
+
+	// Get the Flatpak ID.
+	flatpakID, ok := p.Env["FLATPAK_ID"]
+	if !ok || flatpakID == "" {
+		return
+	}
+
+	// Add matching path for regular profile matching.
+	p.MatchingPath = p.Path
+
+	// Add app image tag.
+	p.Tags = append(p.Tags, profile.Tag{
+		Key:   flatpakIDTagKey,
+		Value: flatpakID,
+	})
+}
+
+// CreateProfile creates a profile based on the tags of the process.
+// Returns nil to skip.
+func (h *flatpakHandler) CreateProfile(p *process.Process) *profile.Profile {
+	if tag, ok := p.GetTag(flatpakIDTagKey); ok {
+		return profile.New(&profile.Profile{
+			Source:              profile.SourceLocal,
+			Name:                osdetail.GenerateBinaryNameFromPath(p.Path),
+			PresentationPath:    p.Path,
+			UsePresentationPath: true,
+			Fingerprints: []profile.Fingerprint{
+				{
+					Type:      profile.FingerprintTypeTagID,
+					Key:       tag.Key,
+					Operation: profile.FingerprintOperationEqualsID,
+					Value:     tag.Value, // Value of flatpakIDTagKey.
+				},
+			},
+		})
+	}
+
+	return nil
+}

process/tags/interpreter_unix.go

@@ -7,10 +7,12 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"strings"
 	"unicode/utf8"
 
 	"github.com/google/shlex"
 
+	"github.com/safing/portbase/utils/osdetail"
 	"github.com/safing/portmaster/process"
 	"github.com/safing/portmaster/profile"
 )
@@ -24,6 +26,7 @@ func init() {
 type interpType struct {
 	process.TagDescription
 
+	Extensions []string
 	Regex      *regexp.Regexp
 }
 
@@ -33,13 +36,15 @@ var knownInterperters = []interpType{
 			ID:   "python-script",
 			Name: "Python Script",
 		},
-		Regex: regexp.MustCompile(`^(/usr)?/bin/python[23]\.[0-9]+$`),
+		Extensions: []string{".py", ".py2", ".py3"},
+		Regex:      regexp.MustCompile(`^(/usr)?/bin/python[23](\.[0-9]+)?$`),
 	},
 	{
 		TagDescription: process.TagDescription{
 			ID:   "shell-script",
 			Name: "Shell Script",
 		},
+		Extensions: []string{".sh", ".bash", ".ksh", ".zsh", ".ash"},
 		Regex:      regexp.MustCompile(`^(/usr)?/bin/(ba|k|z|a)?sh$`),
 	},
 	{
@@ -47,6 +52,7 @@ var knownInterperters = []interpType{
 			ID:   "perl-script",
 			Name: "Perl Script",
 		},
+		Extensions: []string{".pl"},
 		Regex:      regexp.MustCompile(`^(/usr)?/bin/perl$`),
 	},
 	{
@@ -54,6 +60,7 @@ var knownInterperters = []interpType{
 			ID:   "ruby-script",
 			Name: "Ruby Script",
 		},
+		Extensions: []string{".rb"},
 		Regex:      regexp.MustCompile(`^(/usr)?/bin/ruby$`),
 	},
 	{
@@ -61,6 +68,7 @@ var knownInterperters = []interpType{
 			ID:   "nodejs-script",
 			Name: "NodeJS Script",
 		},
+		Extensions: []string{".js"},
 		Regex:      regexp.MustCompile(`^(/usr)?/bin/node(js)?$`),
 	},
 	/*
@@ -148,16 +156,23 @@ func (h *InterpHandler) CreateProfile(p *process.Process) *profile.Profile {
 				args = args[1:]
 			}
 
+			// Create a nice script name from filename.
+			scriptName := filepath.Base(args[0])
+			for _, ext := range it.Extensions {
+				scriptName, _ = strings.CutSuffix(scriptName, ext)
+			}
+			scriptName = osdetail.GenerateBinaryNameFromPath(scriptName)
+
 			return profile.New(&profile.Profile{
 				Source:              profile.SourceLocal,
-				Name:                fmt.Sprintf("%s: %s", it.Name, args[0]),
+				Name:                fmt.Sprintf("%s: %s", it.Name, scriptName),
 				PresentationPath:    tag.Value,
 				UsePresentationPath: true,
 				Fingerprints: []profile.Fingerprint{
 					{
 						Type:      profile.FingerprintTypeTagID,
-						Operation: profile.FingerprintOperationEqualsID,
 						Key:       it.ID,
+						Operation: profile.FingerprintOperationEqualsID,
 						Value:     tag.Value,
 					},
 				},