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author | Julien Dessaux | 2020-01-30 17:44:42 +0100 |
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committer | Julien Dessaux | 2020-01-30 17:44:42 +0100 |
commit | bea8e5aba8fc84dcb0c980c3948ed6d78719dded (patch) | |
tree | f84f2722b98f4c2996b64ce24ac322c9709617ed /state/header.go | |
parent | Document where C structures for state file header and job entry come from (diff) | |
download | bareos-zabbix-check-bea8e5aba8fc84dcb0c980c3948ed6d78719dded.tar.gz bareos-zabbix-check-bea8e5aba8fc84dcb0c980c3948ed6d78719dded.tar.bz2 bareos-zabbix-check-bea8e5aba8fc84dcb0c980c3948ed6d78719dded.zip |
Big rafactoring : code split in several modules and some other best practices
Diffstat (limited to 'state/header.go')
-rw-r--r-- | state/header.go | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/state/header.go b/state/header.go new file mode 100644 index 0000000..3e55899 --- /dev/null +++ b/state/header.go @@ -0,0 +1,57 @@ +package state + +import ( + "bytes" + "encoding/binary" + "fmt" + "log" + "os" +) + +// c.StateFile()HeaderLength : the length of the state file header struct +const headerLength = 14 + 2 + 4 + 4 + 8 + 8 + 19*8 + +// header : 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", sfh.ID[:len(sfh.ID)-2], sfh.Version, sfh.EndOfRecentJobResultsList, sfh.Reserved) +} + +func (s *State) parseHeader(file *os.File) (err error) { + // Parsing the state file header + n, data, err := s.readNextBytes(file, headerLength) + if err != nil { + return fmt.Errorf("INFO Corrupted state file : %s", err) + } + if n != headerLength { + return fmt.Errorf("INFO Corrupted state file : invalid header length in %s", s.config.StateFile()) + } + buffer := bytes.NewBuffer(data) + err = binary.Read(buffer, binary.LittleEndian, &s.header) + if err != nil { + return fmt.Errorf("INFO Corrupted state file : binary.Read failed on header in %s : %s", s.config.StateFile(), err) + } + if s.config.Verbose() { + log.Printf("Parsed header: %+s\n", s.header) + } + if id := string(s.header.ID[:len(s.header.ID)-1]); id != "Bareos State\n" && id != "Bacula State\n" { + return fmt.Errorf("INFO Corrupted state file : Not a bareos or bacula state file %s", s.config.StateFile()) + } + if s.header.Version != 4 { + return fmt.Errorf("INFO Invalid state file : This script only supports bareos state file version 4, got %d", s.header.Version) + } + if s.header.LastJobsAddr == 0 { + return fmt.Errorf("INFO No jobs exist in the state file") + } + return +} |