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116 lines
3.4 KiB
116 lines
3.4 KiB
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package rpm implements a featurefmt.Lister for rpm packages.
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package rpm
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import (
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"bufio"
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"io/ioutil"
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"os"
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"os/exec"
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"strings"
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log "github.com/sirupsen/logrus"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/ext/featurefmt"
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"github.com/coreos/clair/ext/versionfmt"
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"github.com/coreos/clair/ext/versionfmt/rpm"
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"github.com/coreos/clair/pkg/commonerr"
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"github.com/coreos/clair/pkg/tarutil"
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)
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type lister struct{}
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func init() {
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featurefmt.RegisterLister("rpm", rpm.ParserName, &lister{})
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}
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func (l lister) ListFeatures(files tarutil.FilesMap) ([]database.Feature, error) {
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f, hasFile := files["var/lib/rpm/Packages"]
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if !hasFile {
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return []database.Feature{}, nil
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}
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// Create a map to store packages and ensure their uniqueness
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packagesMap := make(map[string]database.Feature)
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// Write the required "Packages" file to disk
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tmpDir, err := ioutil.TempDir(os.TempDir(), "rpm")
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defer os.RemoveAll(tmpDir)
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if err != nil {
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log.WithError(err).Error("could not create temporary folder for RPM detection")
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return []database.Feature{}, commonerr.ErrFilesystem
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}
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err = ioutil.WriteFile(tmpDir+"/Packages", f, 0700)
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if err != nil {
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log.WithError(err).Error("could not create temporary file for RPM detection")
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return []database.Feature{}, commonerr.ErrFilesystem
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}
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// Extract binary package names because RHSA refers to binary package names.
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out, err := exec.Command("rpm", "--dbpath", tmpDir, "-qa", "--qf", "%{NAME} %{EPOCH}:%{VERSION}-%{RELEASE}\n").CombinedOutput()
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if err != nil {
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log.WithError(err).WithField("output", string(out)).Error("could not query RPM")
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// Do not bubble up because we probably won't be able to fix it,
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// the database must be corrupted
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return []database.Feature{}, nil
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}
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scanner := bufio.NewScanner(strings.NewReader(string(out)))
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for scanner.Scan() {
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line := strings.Split(scanner.Text(), " ")
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if len(line) != 2 {
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// We may see warnings on some RPM versions:
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// "warning: Generating 12 missing index(es), please wait..."
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continue
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}
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// Ignore gpg-pubkey packages which are fake packages used to store GPG keys - they are not versionned properly.
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if line[0] == "gpg-pubkey" {
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continue
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}
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// Parse version
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version := strings.Replace(line[1], "(none):", "", -1)
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err := versionfmt.Valid(rpm.ParserName, version)
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if err != nil {
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log.WithError(err).WithField("version", line[1]).Warning("could not parse package version. skipping")
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continue
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}
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// Add package
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pkg := database.Feature{
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Name: line[0],
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Version: version,
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}
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packagesMap[pkg.Name+"#"+pkg.Version] = pkg
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}
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// Convert the map to a slice
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packages := make([]database.Feature, 0, len(packagesMap))
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for _, pkg := range packagesMap {
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pkg.VersionFormat = rpm.ParserName
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packages = append(packages, pkg)
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}
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return packages, nil
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}
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func (l lister) RequiredFilenames() []string {
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return []string{"var/lib/rpm/Packages"}
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}
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