57 lines
2 KiB
Go
57 lines
2 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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"log"
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"os"
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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 : 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", sfh.ID[:len(sfh.ID)-2], sfh.Version, sfh.EndOfRecentJobResultsList, sfh.Reserved)
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}
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func (s *State) parseHeader(file *os.File) (err error) {
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// Parsing the state file header
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n, data, err := s.readNextBytes(file, headerLength)
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if err != nil {
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return fmt.Errorf("INFO Corrupted state file : %s", err)
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}
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if n != headerLength {
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return fmt.Errorf("INFO Corrupted state file : invalid header length in %s", s.config.StateFile())
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}
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buffer := bytes.NewBuffer(data)
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err = binary.Read(buffer, binary.LittleEndian, &s.header)
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if err != nil {
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return fmt.Errorf("INFO Corrupted state file : binary.Read failed on header in %s : %s", s.config.StateFile(), err)
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}
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if s.config.Verbose() {
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log.Printf("Parsed header: %+s\n", s.header)
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}
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if id := string(s.header.ID[:len(s.header.ID)-1]); id != "Bareos State\n" && id != "Bacula State\n" {
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return fmt.Errorf("INFO Corrupted state file : Not a bareos or bacula state file %s", s.config.StateFile())
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}
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if s.header.Version != 4 {
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return fmt.Errorf("INFO Invalid state file : This script only supports bareos state file version 4, got %d", s.header.Version)
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}
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if s.header.LastJobsAddr == 0 {
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return fmt.Errorf("INFO No jobs exist in the state file")
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}
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return
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}
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