func (lm *LogMonitor) Logs() []*LogFile {
logfiles := make([]*LogFile, 0)
for _, glob := range lm.config.Logs {
logs, err := filepath.Glob(glob)
if err != nil {
log.Println("error globbing:", glob, err.Error())
} else {
for _, logpath := range logs {
prev, err := lm.db.getHash(logpath)
if err != nil {
log.Println("error getting hash:", logpath, err.Error())
continue
}
curr, err := imohash.SumFile(logpath)
if err != nil {
log.Println("error summing file:", logpath, err.Error())
continue
}
if bytes.Compare(prev, curr[:]) != 0 {
offset, err := lm.db.getOffset(logpath)
if err != nil {
log.Println("error getting offset:", logpath, err.Error())
continue
}
log.Println("detected changes:", offset, logpath)
file, err := os.Open(logpath)
if err != nil {
log.Println("error opening log:", logpath, err.Error())
continue
}
if _, err := file.Seek(int64(offset), os.SEEK_SET); err != nil {
log.Println("cannot seek:", logpath, err.Error())
continue
}
logfiles = append(logfiles, &LogFile{
file: file,
monitor: lm,
hash: curr[:],
})
} else {
log.Println("no changes:", logpath)
}
}
}
}
return logfiles
}
func main() {
flag.Parse()
files := flag.Args()
if len(files) == 0 {
fmt.Println("imosum filenames")
os.Exit(0)
}
for _, file := range files {
hash, err := imohash.SumFile(file)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%016x %s\n", hash, file)
}
}