diff options
Diffstat (limited to 'internal/nametransform/longnames.go')
| -rw-r--r-- | internal/nametransform/longnames.go | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/internal/nametransform/longnames.go b/internal/nametransform/longnames.go index 9c8637e..6788ce6 100644 --- a/internal/nametransform/longnames.go +++ b/internal/nametransform/longnames.go @@ -24,6 +24,8 @@ const ( // HashLongName - take the hash of a long string "name" and return // "gocryptfs.longname.[sha256]" +// +// This function does not do any I/O. func (n *NameTransform) HashLongName(name string) string { hashBin := sha256.Sum256([]byte(name)) hashBase64 := n.B64.EncodeToString(hashBin[:]) @@ -47,6 +49,8 @@ const ( // gocryptfs.longname.[sha256] ........ LongNameContent (content of a long name file) // gocryptfs.longname.[sha256].name .... LongNameFilename (full file name of a long name file) // else ................................ LongNameNone (normal file) +// +// This function does not do any I/O. func NameType(cName string) int { if !strings.HasPrefix(cName, longNamePrefix) { return LongNameNone @@ -59,11 +63,15 @@ func NameType(cName string) int { // IsLongContent returns true if "cName" is the content store of a long name // file (looks like "gocryptfs.longname.[sha256]"). +// +// This function does not do any I/O. func IsLongContent(cName string) bool { return NameType(cName) == LongNameContent } -// ReadLongName - read "$path.name" +// ReadLongName - read cName + ".name" from the directory opened as dirfd. +// +// Symlink-safe through Openat(). func ReadLongNameAt(dirfd int, cName string) (string, error) { cName += LongNameSuffix fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_NOFOLLOW, 0) |