57 lines
1.9 KiB
Go
57 lines
1.9 KiB
Go
package state
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"io"
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"git.adyxax.org/adyxax/bareos-zabbix-check/pkg/utils"
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"github.com/pkg/errors"
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)
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// c.StateFile()HeaderLength : the length of the state file header struct
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const headerLength = 14 + 2 + 4 + 4 + 8 + 8 // + 19*8
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// Header is a structure to hold the header of the state file. It is statically aligned for amd64 architecture
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// This comes from bareos repository file core/src/lib/bsys.cc:525 and core/src/lib/bsys.cc:652
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type Header struct {
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ID [14]byte
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_ int16
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Version int32
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_ int32
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LastJobsAddr uint64
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EndOfRecentJobResultsList uint64
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//Reserved [19]uint64
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}
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func (sfh *Header) String() string {
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return fmt.Sprintf("ID: \"%s\", Version: %d, LastJobsAddr: %d, EndOfRecentJobResultsList: %d",
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string(sfh.ID[:utils.Clen(sfh.ID[:])]), sfh.Version, sfh.LastJobsAddr, sfh.EndOfRecentJobResultsList)
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}
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// ParseHeader parses a Header struct
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func ParseHeader(handle io.Reader) (h *Header, err error) {
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// Parsing the state file header
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data := make([]byte, headerLength)
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n, err := handle.Read(data)
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if err != nil {
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return nil, errors.Wrap(err, "Corrupted state file")
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}
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if n != headerLength {
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return nil, fmt.Errorf("Corrupted state file : invalid header length")
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}
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buffer := bytes.NewBuffer(data)
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h = &Header{}
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_ = binary.Read(buffer, binary.LittleEndian, h) // this call cannot fail since we checked the header length
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if id := string(h.ID[:utils.Clen(h.ID[:])]); id != "Bareos State\n" && id != "Bacula State\n" {
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return nil, fmt.Errorf("Corrupted state file : Not a bareos or bacula state file : %s", id)
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}
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if h.Version != 4 {
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return nil, fmt.Errorf("Invalid state file : This script only supports bareos state file version 4, got %d", h.Version)
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}
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if h.LastJobsAddr == 0 {
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return nil, fmt.Errorf("No jobs exist in the state file")
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}
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return
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}
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