func unmount(path string) error {
log.Info(2, "searching path for fusermount.")
fusermountPath, err := exec.LookPath("fusermount")
if err != nil {
return fmt.Errorf("could not find 'fusermount': ensure fuse is installed: %v", err)
}
log.Infof(2, "running: %v -u %v.", fusermountPath, path)
process, err := os.StartProcess(fusermountPath, []string{fusermountPath, "-u", path}, &os.ProcAttr{})
if err != nil {
return fmt.Errorf("could not start 'fusermount': %v", err)
}
log.Info(2, "waiting for process to exit.")
processState, err := process.Wait()
if err != nil {
return fmt.Errorf("error waiting for process to exit: %v", err)
}
if !processState.Success() {
return fmt.Errorf("could not unmount virtual filesystem.")
}
return nil
}
func listFilesForQuery(queryText string, dirOnly, fileOnly, topOnly, leafOnly, recursive, print0, showCount, onePerLine bool) error {
if queryText == "" {
return fmt.Errorf("query must be specified. Use --all to show all files.")
}
store, err := storage.Open()
if err != nil {
return fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "parsing query")
expression, err := query.Parse(queryText)
if err != nil {
return err
}
log.Info(2, "checking tag names")
wereErrors := false
tagNames := query.TagNames(expression)
tags, err := store.TagsByNames(tagNames)
for _, tagName := range tagNames {
if !tags.ContainsName(tagName) {
log.Warnf("no such tag '%v'.", tagName)
wereErrors = true
continue
}
}
if wereErrors {
return blankError
}
log.Info(2, "querying database")
files, err := store.QueryFiles(expression)
if err != nil {
return fmt.Errorf("could not query files: %v", err)
}
if err = listFiles(files, dirOnly, fileOnly, topOnly, leafOnly, recursive, print0, showCount, onePerLine); err != nil {
return err
}
return nil
}
func findDuplicatesInDb() error {
store, err := storage.Open()
if err != nil {
return fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "identifying duplicate files.")
fileSets, err := store.DuplicateFiles()
if err != nil {
return fmt.Errorf("could not identify duplicate files: %v", err)
}
log.Infof(2, "found %v sets of duplicate files.", len(fileSets))
for index, fileSet := range fileSets {
if index > 0 {
fmt.Println()
}
fmt.Printf("Set of %v duplicates:\n", len(fileSet))
for _, file := range fileSet {
relPath := _path.Rel(file.Path())
fmt.Printf(" %v\n", relPath)
}
}
return nil
}
// Commits the current transaction
func (db *Database) Commit() error {
log.Info(2, "committing transaction")
if err := db.transaction.Commit(); err != nil {
return fmt.Errorf("could not commit transaction: %v", err)
}
log.Info(2, "beginning new transaction")
transaction, err := db.connection.Begin()
if err != nil {
return fmt.Errorf("could not begin new transaction: %v", err)
}
db.transaction = transaction
return nil
}
func listMounts() error {
log.Info(2, "retrieving mount table.")
mt, err := vfs.GetMountTable()
if err != nil {
return fmt.Errorf("could not get mount table: %v", err)
}
if len(mt) == 0 {
log.Info(2, "mount table is empty.")
}
for _, mount := range mt {
fmt.Printf("'%v' at '%v'\n", mount.DatabasePath, mount.MountPath)
}
return nil
}
// Executes a SQL query returning rows.
func (db *Database) ExecQuery(sql string, args ...interface{}) (*sql.Rows, error) {
if log.Verbosity >= 3 {
log.Infof(3, "executing query\n"+sql)
for index, arg := range args {
log.Info(3, "Arg %v = %v", index, arg)
}
}
return db.transaction.Query(sql, args...)
}
// Executes a SQL query.
func (db *Database) Exec(sql string, args ...interface{}) (sql.Result, error) {
if log.Verbosity >= 3 {
log.Infof(3, "executing update\n"+sql)
for index, arg := range args {
log.Info(3, "Arg %v = %v", index, arg)
}
}
return db.transaction.Exec(sql, args...)
}
func unmountAll() error {
log.Info(2, "retrieving mount table.")
mt, err := vfs.GetMountTable()
if err != nil {
return fmt.Errorf("could not get mount table: %v", err)
}
if len(mt) == 0 {
log.Info(2, "mount table is empty.")
}
for _, mount := range mt {
err = unmount(mount.MountPath)
if err != nil {
return err
}
}
return nil
}
func init() {
if path := os.Getenv("TMSU_DB"); path != "" {
log.Info(3, "TMSU_DB=", path)
Path = path
} else {
u, err := user.Current()
if err != nil {
log.Fatalf("could not identify current user: %v", err)
}
Path = filepath.Join(u.HomeDir, ".tmsu", "default.db")
}
}
func listAllFiles(dirOnly, fileOnly, topOnly, leafOnly, recursive, print0, showCount, onePerLine bool) error {
store, err := storage.Open()
if err != nil {
return fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "retrieving all files from database.")
files, err := store.Files()
if err != nil {
return fmt.Errorf("could not retrieve files: %v", err)
}
return listFiles(files, dirOnly, fileOnly, topOnly, leafOnly, recursive, print0, showCount, onePerLine)
}
func statusDatabase(dirOnly bool) (*StatusReport, error) {
report := NewReport()
store, err := storage.Open()
if err != nil {
return nil, fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "retrieving all files from database.")
files, err := store.Files()
if err != nil {
return nil, fmt.Errorf("could not retrieve files: %v", err)
}
err = statusCheckFiles(files, report)
if err != nil {
return nil, err
}
tree := path.NewTree()
for _, file := range files {
tree.Add(file.Path(), file.IsDir)
}
topLevelPaths := tree.TopLevel().Paths()
if err != nil {
return nil, err
}
for _, path := range topLevelPaths {
if err = findNewFiles(path, report, dirOnly); err != nil {
return nil, err
}
}
return report, nil
}
func listAllTags(showCount, onePerLine bool) error {
store, err := storage.Open()
if err != nil {
return fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "retrieving all tags.")
if showCount {
count, err := store.TagCount()
if err != nil {
return fmt.Errorf("could not retrieve tag count: %v", err)
}
fmt.Println(count)
} else {
tags, err := store.Tags()
if err != nil {
return fmt.Errorf("could not retrieve tags: %v", err)
}
if onePerLine {
for _, tag := range tags {
fmt.Println(tag.Name)
}
} else {
tagNames := make([]string, len(tags))
for index, tag := range tags {
tagNames[index] = tag.Name
}
format.Columns(tagNames, terminalWidth())
}
}
return nil
}
func listAllValues(showCount, onePerLine bool) error {
store, err := storage.Open()
if err != nil {
return fmt.Errorf("could not open storage: %v", err)
}
defer store.Close()
log.Info(2, "retrieving all values.")
if showCount {
count, err := store.ValueCount()
if err != nil {
return fmt.Errorf("could not retrieve value count: %v", err)
}
fmt.Println(count)
} else {
values, err := store.Values()
if err != nil {
return fmt.Errorf("could not retrieve values: %v", err)
}
if onePerLine {
for _, value := range values {
fmt.Println(value.Name)
}
} else {
valueNames := make([]string, len(values))
for index, value := range values {
valueNames[index] = value.Name
}
format.Columns(valueNames, terminalWidth())
}
}
return nil
}
// Closes the database connection
func (db *Database) Close() error {
log.Info(3, "closing database")
return db.connection.Close()
}
func mountExplicit(databasePath string, mountPath string, mountOptions string) error {
if alreadyMounted(mountPath) {
return fmt.Errorf("%v: mount path already in use", mountPath)
}
stat, err := os.Stat(mountPath)
if err != nil {
return fmt.Errorf("%v: could not stat: %v", mountPath, err)
}
if stat == nil {
return fmt.Errorf("%v: mount point does not exist.", mountPath)
}
if !stat.IsDir() {
return fmt.Errorf("%v: mount point is not a directory.", mountPath)
}
stat, err = os.Stat(databasePath)
if err != nil {
return fmt.Errorf("%v: could not stat: %v", databasePath, err)
}
if stat == nil {
return fmt.Errorf("%v: database does not exist.")
}
log.Infof(2, "spawning daemon to mount VFS for database '%v' at '%v'.", databasePath, mountPath)
args := []string{"vfs", databasePath, mountPath, "--options=" + mountOptions}
daemon := exec.Command(os.Args[0], args...)
errorPipe, err := daemon.StderrPipe()
if err != nil {
return fmt.Errorf("could not open standard error pipe: %v", err)
}
err = daemon.Start()
if err != nil {
return fmt.Errorf("could not start daemon: %v", err)
}
log.Info(2, "sleeping.")
const HALF_SECOND = 500000000
time.Sleep(HALF_SECOND)
log.Info(2, "checking whether daemon started successfully.")
var waitStatus syscall.WaitStatus
var rusage syscall.Rusage
_, err = syscall.Wait4(daemon.Process.Pid, &waitStatus, syscall.WNOHANG, &rusage)
if err != nil {
return fmt.Errorf("could not check daemon status: %v", err)
}
if waitStatus.Exited() {
if waitStatus.ExitStatus() != 0 {
buffer := make([]byte, 1024)
count, err := errorPipe.Read(buffer)
if err != nil {
return fmt.Errorf("could not read from error pipe: %v", err)
}
return fmt.Errorf("virtual filesystem mount failed: %v", string(buffer[0:count]))
}
}
return nil
}
