diff options
Diffstat (limited to 'internal/nametransform/longnames.go')
| -rw-r--r-- | internal/nametransform/longnames.go | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/internal/nametransform/longnames.go b/internal/nametransform/longnames.go index da18ebb..9c8637e 100644 --- a/internal/nametransform/longnames.go +++ b/internal/nametransform/longnames.go @@ -64,18 +64,18 @@ func IsLongContent(cName string) bool { } // ReadLongName - read "$path.name" -func ReadLongName(path string) (string, error) { - path += LongNameSuffix - fd, err := os.Open(path) +func ReadLongNameAt(dirfd int, cName string) (string, error) { + cName += LongNameSuffix + fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_NOFOLLOW, 0) if err != nil { return "", err } - defer fd.Close() + defer syscall.Close(fd) // 256 (=255 padded to 16) bytes base64-encoded take 344 bytes: "AAAAAAA...AAA==" lim := 344 // Allocate a bigger buffer so we see whether the file is too big buf := make([]byte, lim+1) - n, err := fd.ReadAt(buf, 0) + n, err := syscall.Pread(fd, buf, 0) if err != nil && err != io.EOF { return "", err } @@ -88,7 +88,9 @@ func ReadLongName(path string) (string, error) { return string(buf[0:n]), nil } -// DeleteLongName deletes "hashName.name". +// DeleteLongName deletes "hashName.name" in the directory openend at "dirfd". +// +// This function is symlink-safe through the use of Unlinkat(). func DeleteLongName(dirfd int, hashName string) error { err := syscallcompat.Unlinkat(dirfd, hashName+LongNameSuffix, 0) if err != nil { @@ -99,7 +101,9 @@ func DeleteLongName(dirfd int, hashName string) error { // WriteLongName encrypts plainName and writes it into "hashName.name". // For the convenience of the caller, plainName may also be a path and will be -// converted internally. +// Base()named internally. +// +// This function is symlink-safe through the use of Openat(). func (n *NameTransform) WriteLongName(dirfd int, hashName string, plainName string) (err error) { plainName = filepath.Base(plainName) |