Updated for go 1.16 modules1.2

4 files changed, 437 insertions, 0 deletions

diff --git a/pkg/state/header.go b/pkg/state/header.go
new file mode 100644
index 0000000..ee6629b
--- /dev/null
+++ b/pkg/state/header.go
@@ -0,0 +1,57 @@
+package state
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+
+	"git.adyxax.org/adyxax/bareos-zabbix-check/pkg/utils"
+	"github.com/pkg/errors"
+)
+
+// c.StateFile()HeaderLength : the length of the state file header struct
+const headerLength = 14 + 2 + 4 + 4 + 8 + 8 // + 19*8
+
+// Header is a structure to hold the header of the state file. It is statically aligned for amd64 architecture
+// This comes from bareos repository file core/src/lib/bsys.cc:525 and core/src/lib/bsys.cc:652
+type Header struct {
+	ID                        [14]byte
+	_                         int16
+	Version                   int32
+	_                         int32
+	LastJobsAddr              uint64
+	EndOfRecentJobResultsList uint64
+	//Reserved                  [19]uint64
+}
+
+func (sfh *Header) String() string {
+	return fmt.Sprintf("ID: \"%s\", Version: %d, LastJobsAddr: %d, EndOfRecentJobResultsList: %d",
+		string(sfh.ID[:utils.Clen(sfh.ID[:])]), sfh.Version, sfh.LastJobsAddr, sfh.EndOfRecentJobResultsList)
+}
+
+// ParseHeader parses a Header struct
+func ParseHeader(handle io.Reader) (h *Header, err error) {
+	// Parsing the state file header
+	data := make([]byte, headerLength)
+	n, err := handle.Read(data)
+	if err != nil {
+		return nil, errors.Wrap(err, "Corrupted state file")
+	}
+	if n != headerLength {
+		return nil, fmt.Errorf("Corrupted state file : invalid header length")
+	}
+	buffer := bytes.NewBuffer(data)
+	h = &Header{}
+	_ = binary.Read(buffer, binary.LittleEndian, h) // this call cannot fail since we checked the header length
+	if id := string(h.ID[:utils.Clen(h.ID[:])]); id != "Bareos State\n" && id != "Bacula State\n" {
+		return nil, fmt.Errorf("Corrupted state file : Not a bareos or bacula state file : %s", id)
+	}
+	if h.Version != 4 {
+		return nil, fmt.Errorf("Invalid state file : This script only supports bareos state file version 4, got %d", h.Version)
+	}
+	if h.LastJobsAddr == 0 {
+		return nil, fmt.Errorf("No jobs exist in the state file")
+	}
+	return
+}
diff --git a/pkg/state/header_test.go b/pkg/state/header_test.go
new file mode 100644
index 0000000..1ed71eb
--- /dev/null
+++ b/pkg/state/header_test.go
@@ -0,0 +1,109 @@
+package state
+
+import (
+	"bytes"
+	"io"
+	"reflect"
+	"testing"
+)
+
+func Test_header_String(t *testing.T) {
+	var id [14]byte
+	copy(id[:], []byte("test"))
+	type fields struct {
+		ID                        [14]byte
+		Version                   int32
+		LastJobsAddr              uint64
+		EndOfRecentJobResultsList uint64
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   string
+	}{
+		{"default header", fields{ID: id, Version: 1, LastJobsAddr: 2, EndOfRecentJobResultsList: 3}, "ID: \"test\", Version: 1, LastJobsAddr: 2, EndOfRecentJobResultsList: 3"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sfh := Header{
+				ID:                        tt.fields.ID,
+				Version:                   tt.fields.Version,
+				LastJobsAddr:              tt.fields.LastJobsAddr,
+				EndOfRecentJobResultsList: tt.fields.EndOfRecentJobResultsList,
+			}
+			if got := sfh.String(); got != tt.want {
+				t.Errorf("header.String() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_parseHeader(t *testing.T) {
+	readerEmpty := bytes.NewReader([]byte(""))
+	readerTooSmall := bytes.NewReader([]byte("abcd"))
+	readerNotBareosNorBacula := bytes.NewReader([]byte{
+		't', 'e', 's', 't', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ID
+		0, 0, // padding
+		4, 0, 0, 0, // version
+		0, 0, 0, 0, //padding
+		0, 0, 0, 0, 0, 0, 0, 0, // last job address
+		0, 0, 0, 0, 0, 0, 0, 0, // EndOfRecentJobResultsLis
+	})
+	readerBadVersion := bytes.NewReader([]byte{
+		'B', 'a', 'r', 'e', 'o', 's', ' ', 'S', 't', 'a', 't', 'e', '\n', 0, // ID
+		0, 0, // padding
+		3, 0, 0, 0, // version
+		0, 0, 0, 0, //padding
+		0, 0, 0, 0, 0, 0, 0, 0, // last job address
+		0, 0, 0, 0, 0, 0, 0, 0, // EndOfRecentJobResultsLis
+	})
+	readerNoJobs := bytes.NewReader([]byte{
+		'B', 'a', 'r', 'e', 'o', 's', ' ', 'S', 't', 'a', 't', 'e', '\n', 0, // ID
+		0, 0, // padding
+		4, 0, 0, 0, // version
+		0, 0, 0, 0, //padding
+		0, 0, 0, 0, 0, 0, 0, 0, // last job address
+		0, 0, 0, 0, 0, 0, 0, 0, // EndOfRecentJobResultsList
+	})
+	readerValid := bytes.NewReader([]byte{
+		'B', 'a', 'r', 'e', 'o', 's', ' ', 'S', 't', 'a', 't', 'e', '\n', 0, // ID
+		0, 0, // padding
+		4, 0, 0, 0, // version
+		0, 0, 0, 0, //padding
+		192, 0, 0, 0, 0, 0, 0, 0, // last job address
+		254, 0, 0, 0, 0, 0, 0, 0, // EndOfRecentJobResultsList
+	})
+	type args struct {
+		handle io.Reader
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantH   *Header
+		wantErr bool
+	}{
+		{"read error", args{readerEmpty}, nil, true},
+		{"invalid header length", args{readerTooSmall}, nil, true},
+		{"reader not bareos nor bacula", args{readerNotBareosNorBacula}, nil, true},
+		{"reader bad version", args{readerBadVersion}, nil, true},
+		{"reader no jobs", args{readerNoJobs}, nil, true},
+		{"reader valid", args{readerValid}, &Header{
+			ID:                        [14]byte{'B', 'a', 'r', 'e', 'o', 's', ' ', 'S', 't', 'a', 't', 'e', '\n', 0},
+			Version:                   4,
+			LastJobsAddr:              192,
+			EndOfRecentJobResultsList: 254,
+		}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotH, err := ParseHeader(tt.args.handle)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("parseHeader() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(gotH, tt.wantH) {
+				t.Errorf("parseHeader() = %v, want %v", gotH, tt.wantH)
+			}
+		})
+	}
+}
diff --git a/pkg/state/job.go b/pkg/state/job.go
new file mode 100644
index 0000000..e86bc8e
--- /dev/null
+++ b/pkg/state/job.go
@@ -0,0 +1,96 @@
+package state
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"regexp"
+	"time"
+
+	"git.adyxax.org/adyxax/bareos-zabbix-check/pkg/job"
+	"git.adyxax.org/adyxax/bareos-zabbix-check/pkg/utils"
+	"github.com/pkg/errors"
+)
+
+// maxnameLength : the maximum length of a job name, hardcoded in bareos
+const maxNameLength = 128
+
+// jobLength : the length of the job result struct
+const jobLength = 16 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 8 + 8 + 8 + maxNameLength
+
+var jobNameRegex = regexp.MustCompilePOSIX(`^([-A-Za-z0-9_]+)\.[0-9]{4}-[0-9]{2}-[0-9]{2}.*`)
+
+// jobEntry : A structure to hold a job result from the state file
+// This comes from bareos repository file core/src/lib/recent_job_results_list.h:29 and file core/src/lib/recent_job_results_list.cc:44
+type jobEntry struct {
+	_              [16]byte
+	Errors         int32
+	JobType        int32
+	JobStatus      int32
+	JobLevel       int32
+	JobID          uint32
+	VolSessionID   uint32
+	VolSessionTime uint32
+	JobFiles       uint32
+	JobBytes       uint64
+	StartTime      uint64
+	EndTime        uint64
+	Job            [maxNameLength]byte
+}
+
+func (je jobEntry) String() string {
+	var matches = jobNameRegex.FindSubmatchIndex(je.Job[:])
+	jobNameLen := utils.Clen(je.Job[:])
+	if len(matches) >= 4 {
+		jobNameLen = matches[3]
+	}
+	return fmt.Sprintf("Errors: %d, JobType: %c, JobStatus: %c, JobLevel: %c, JobID: %d, VolSessionID: %d, VolSessionTime: %d, JobFiles: %d, JobBytes: %d, StartTime: %s, EndTime: %s, Job: %s",
+		je.Errors, je.JobType, je.JobStatus, je.JobLevel, je.JobID, je.VolSessionID, je.VolSessionTime, je.JobFiles, je.JobBytes, time.Unix(int64(je.StartTime), 0), time.Unix(int64(je.EndTime), 0), je.Job[:jobNameLen])
+}
+
+// ParseJobs parses the jobs in a state file
+func ParseJobs(handle io.Reader) (jobs []job.Job, err error) {
+	// We read how many jobs there are in the state file
+	data := make([]byte, 4)
+	n, err := handle.Read(data)
+	if err != nil {
+		return nil, errors.Wrap(err, "Corrupted state file")
+	}
+	if n != 4 {
+		return nil, fmt.Errorf("Corrupted state file : invalid numberOfJobs read length")
+	}
+	buffer := bytes.NewBuffer(data)
+	var numberOfJobs uint32
+	_ = binary.Read(buffer, binary.LittleEndian, &numberOfJobs) // this call cannot fail since we checked the header length
+
+	// We parse the job entries
+	for ; numberOfJobs > 0; numberOfJobs-- {
+		var (
+			jobResult jobEntry
+			jobName   string
+		)
+		data := make([]byte, jobLength)
+		n, err = handle.Read(data)
+		if err != nil {
+			return nil, errors.Wrap(err, "Corrupted state file")
+		}
+		if n != jobLength {
+			return nil, fmt.Errorf("Corrupted state file : invalid job entry")
+		}
+		buffer = bytes.NewBuffer(data)
+		_ = binary.Read(buffer, binary.LittleEndian, &jobResult) // this call cannot fail since we checked the header length
+		matches := jobNameRegex.FindSubmatchIndex(jobResult.Job[:])
+		if len(matches) >= 4 {
+			jobName = string(jobResult.Job[:matches[3]])
+		} else {
+			return nil, fmt.Errorf("Couldn't parse job name, this shouldn't happen : %s", jobResult.Job[:])
+		}
+		// If the job is of type backup (B == ascii 66)
+		if jobResult.JobType == 66 {
+			// If the job is of status success JobStatus is equals to 84 (T == ascii 84)
+			jobs = append(jobs, job.Job{Name: jobName, Timestamp: jobResult.StartTime, Success: jobResult.JobStatus == 84})
+		}
+	}
+	return
+}
diff --git a/pkg/state/job_test.go b/pkg/state/job_test.go
new file mode 100644
index 0000000..f814574
--- /dev/null
+++ b/pkg/state/job_test.go
@@ -0,0 +1,175 @@
+package state
+
+import (
+	"bytes"
+	"io"
+	"reflect"
+	"testing"
+
+	"git.adyxax.org/adyxax/bareos-zabbix-check/pkg/job"
+)
+
+func Test_jobEntry_String(t *testing.T) {
+	var badlyNamedJob [128]byte
+	copy(badlyNamedJob[:], []byte("job_name"))
+	var normalJob [128]byte
+	copy(normalJob[:], []byte("normal_name.2012-06-01"))
+	type fields struct {
+		Errors         int32
+		JobType        int32
+		JobStatus      int32
+		JobLevel       int32
+		JobID          uint32
+		VolSessionID   uint32
+		VolSessionTime uint32
+		JobFiles       uint32
+		JobBytes       uint64
+		StartTime      uint64
+		EndTime        uint64
+		Job            [maxNameLength]byte
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   string
+	}{
+		{
+			"normal job",
+			fields{Errors: 1, JobType: 'B', JobStatus: 'T', JobLevel: 'F', JobID: 2, VolSessionID: 3, VolSessionTime: 4, JobFiles: 5, JobBytes: 6, Job: badlyNamedJob},
+			"Errors: 1, JobType: B, JobStatus: T, JobLevel: F, JobID: 2, VolSessionID: 3, VolSessionTime: 4, JobFiles: 5, JobBytes: 6, StartTime: 1970-01-01 01:00:00 +0100 CET, EndTime: 1970-01-01 01:00:00 +0100 CET, Job: job_name",
+		},
+		{
+			"badly named job",
+			fields{Errors: 1, JobType: 'B', JobStatus: 'T', JobLevel: 'F', JobID: 2, VolSessionID: 3, VolSessionTime: 4, JobFiles: 5, JobBytes: 6, Job: normalJob},
+			"Errors: 1, JobType: B, JobStatus: T, JobLevel: F, JobID: 2, VolSessionID: 3, VolSessionTime: 4, JobFiles: 5, JobBytes: 6, StartTime: 1970-01-01 01:00:00 +0100 CET, EndTime: 1970-01-01 01:00:00 +0100 CET, Job: normal_name",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			je := jobEntry{
+				Errors:         tt.fields.Errors,
+				JobType:        tt.fields.JobType,
+				JobStatus:      tt.fields.JobStatus,
+				JobLevel:       tt.fields.JobLevel,
+				JobID:          tt.fields.JobID,
+				VolSessionID:   tt.fields.VolSessionID,
+				VolSessionTime: tt.fields.VolSessionTime,
+				JobFiles:       tt.fields.JobFiles,
+				JobBytes:       tt.fields.JobBytes,
+				StartTime:      tt.fields.StartTime,
+				EndTime:        tt.fields.EndTime,
+				Job:            tt.fields.Job,
+			}
+			if got := je.String(); got != tt.want {
+				t.Errorf("jobEntry.String() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestParseJobs(t *testing.T) {
+	readerEmpty := bytes.NewReader([]byte{})
+	readerTooSmall := bytes.NewReader([]byte{
+		1, // number of jobs
+	})
+	readerJobError := bytes.NewReader([]byte{
+		1, 0, 0, 0, // number of jobs
+	})
+	readerJobTooSmall := bytes.NewReader([]byte{
+		1, 0, 0, 0, // number of jobs
+		0,
+	})
+	readerInvalidJobName := bytes.NewReader([]byte{
+		1, 0, 0, 0, // number of jobs
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // pad
+		0, 0, 0, 0, // Errors
+		'B', 0, 0, 0, // JobType
+		'T', 0, 0, 0, // JobStatus
+		0, 0, 0, 0, // JobLevel
+		0, 0, 0, 0, // JobID
+		0, 0, 0, 0, // VolSessionID
+		0, 0, 0, 0, // VolSessionTime
+		0, 0, 0, 0, // JobFiles
+		0, 0, 0, 0, 0, 0, 0, 0, // JobBytes
+		1, 0, 0, 0, 0, 0, 0, 0, // StartTime
+		0, 0, 0, 0, 0, 0, 0, 0, // EndTime
+		't', 'e', 's', 't', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Job
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	})
+	readerZeroJobs := bytes.NewReader([]byte{
+		0, 0, 0, 0, // number of jobs
+	})
+	readerOneNonBackupJob := bytes.NewReader([]byte{
+		1, 0, 0, 0, // number of jobs
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // pad
+		0, 0, 0, 0, // Errors
+		'R', 0, 0, 0, // JobType
+		'T', 0, 0, 0, // JobStatus
+		0, 0, 0, 0, // JobLevel
+		0, 0, 0, 0, // JobID
+		0, 0, 0, 0, // VolSessionID
+		0, 0, 0, 0, // VolSessionTime
+		0, 0, 0, 0, // JobFiles
+		0, 0, 0, 0, 0, 0, 0, 0, // JobBytes
+		1, 0, 0, 0, 0, 0, 0, 0, // StartTime
+		0, 0, 0, 0, 0, 0, 0, 0, // EndTime
+		't', 'e', 's', 't', '.', '2', '0', '1', '2', '-', '0', '2', '-', '0', '1', 0, // Job
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	})
+	readerOneSuccessfulBackupJob := bytes.NewReader([]byte{
+		1, 0, 0, 0, // number of jobs
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // pad
+		0, 0, 0, 0, // Errors
+		'B', 0, 0, 0, // JobType
+		'T', 0, 0, 0, // JobStatus
+		0, 0, 0, 0, // JobLevel
+		0, 0, 0, 0, // JobID
+		0, 0, 0, 0, // VolSessionID
+		0, 0, 0, 0, // VolSessionTime
+		0, 0, 0, 0, // JobFiles
+		0, 0, 0, 0, 0, 0, 0, 0, // JobBytes
+		1, 0, 0, 0, 0, 0, 0, 0, // StartTime
+		0, 0, 0, 0, 0, 0, 0, 0, // EndTime
+		't', 'e', 's', 't', '.', '2', '0', '1', '2', '-', '0', '2', '-', '0', '1', 0, // Job
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	})
+	type args struct {
+		handle io.Reader
+	}
+	tests := []struct {
+		name     string
+		args     args
+		wantJobs []job.Job
+		wantErr  bool
+	}{
+		{"read empty", args{readerEmpty}, nil, true},
+		{"read too small", args{readerTooSmall}, nil, true},
+		{"read job error", args{readerJobError}, nil, true},
+		{"read job too small", args{readerJobTooSmall}, nil, true},
+		{"read invalid job name", args{readerInvalidJobName}, nil, true},
+		{"read zero jobs", args{readerZeroJobs}, nil, false},
+		{"read one non backup job", args{readerOneNonBackupJob}, nil, false},
+		{"read one successful backup job", args{readerOneSuccessfulBackupJob}, []job.Job{{Name: "test", Timestamp: 1, Success: true}}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotJobs, err := ParseJobs(tt.args.handle)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ParseJobs() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(gotJobs, tt.wantJobs) {
+				t.Errorf("ParseJobs() = %v, want %v", gotJobs, tt.wantJobs)
+			}
+		})
+	}
+}