Display existing hard links in result sets
This is a breaking change in the plain text output,
but somehow the list displayed in case of existing hard links
was arbitrary, since the all the hardlinked filenames were not displayed.
Here's a sample JSON result with this patch:
{
"file_size": 9216,
"paths": [
"test_tree/f09-1_5.raw",
"test_tree/f09-4_5.raw"
],
"links": {
"test_tree/f09-1_5.raw": [
"test_tree/f09-2_5.raw",
"test_tree/f09-3_5.raw"
],
"test_tree/f09-4_5.raw": [
"test_tree/f09-5_5.raw"
]
}
}
Here the 5 files have the same contents, but there are two hardlink groups:
"test_tree/f09-1_5.raw"
"test_tree/f09-2_5.raw"
"test_tree/f09-3_5.raw"
are hard-linked, and
"test_tree/f09-4_5.raw"
"test_tree/f09-5_5.raw"
are hard-linked.
Here's the same set displayed With the regular text output:
Group #5 (2 files * 9216 bytes):
test_tree/f09-1_5.raw
test_tree/f09-2_5.raw
test_tree/f09-3_5.raw
test_tree/f09-4_5.raw
test_tree/f09-5_5.raw
(The link file names are indented using 1 space character.)
//
// Copyright (C) 2014 Mikael Berthe <mikael@lilotux.net>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at
// your option) any later version.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
package main
import "os"
import "syscall"
// ByInode is a FileObjList type with a sort interface
type ByInode FileObjList
func (a ByInode) Len() int { return len(a) }
func (a ByInode) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByInode) Less(i, j int) bool {
// Sort by device id first
iDevice := a[i].Sys().(*syscall.Stat_t).Dev
jDevice := a[j].Sys().(*syscall.Stat_t).Dev
switch {
case iDevice < jDevice:
return true
case iDevice > jDevice:
return false
}
iInode := a[i].Sys().(*syscall.Stat_t).Ino
jInode := a[j].Sys().(*syscall.Stat_t).Ino
return iInode < jInode
}
// OSHasInodes returns true iff the O.S. uses inodes for its filesystems.
func OSHasInodes() bool {
return true
}
// GetDevIno returns the device and inode IDs of a given file.
func GetDevIno(fi os.FileInfo) (uint64, uint64) {
dev := fi.Sys().(*syscall.Stat_t).Dev
ino := fi.Sys().(*syscall.Stat_t).Ino
return uint64(dev), uint64(ino)
}