1#!/bin/bash 2 3[ -f testing.sh ] && . testing.sh 4 5#testing "name" "command" "result" "infile" "stdin" 6 7if [ "$(id -u)" -ne 0 ]; then 8 echo "$SHOWSKIP: chattr (not root)" 9 return 2>/dev/null 10 exit 11fi 12 13function clean() 14{ 15 # We don't know whether the fs will have extents (e, typically true on the 16 # desktop) or be encrypted (E, typically true on Android), or have data 17 # inlined in the inode (N), or use indexed directories, so strip those out. 18 # We also don't want to rely on chattr(1) to set a known version number or 19 # project number, so blank out any numbers. 20 sed -E -e 's/, (Encrypted|Extents|Indexed_directory|Inline_Data)//g;' \ 21 -e 's/[EeIN]-/--/g; s/[0-9]+/_/g' 22} 23 24mkdir testattr 25IN="cd testattr" 26OUT="cd .." 27_t="abcdefghijklmnopqrstuvwxyz" 28 29_empty="--------------------" 30 31# Check +i (immutable) works by trying to write to and remove the file. 32_i="----i---------------" 33testing "immutable" "$IN && echo "$_t" > testFile && 34 chattr +i testFile && lsattr testFile | clean && 35 date > testFile 2>/dev/null; rm testFile; chattr -i testFile; 36 cat testFile; rm -rf testFile; $OUT " "$_i testFile\n$_t\n" "" "" 37 38# Check +a (append-only) works by failing to write and succeeding in appending. 39_a="-----a--------------" 40testing "append-only" "$IN && echo "$_t" > testFile && 41 chattr +a testFile && 42 echo $_t >> testFile && 43 date > testFile || lsattr testFile | clean && 44 chattr -a testFile; cat testFile; rm -rf testFile; $OUT" \ 45 "$_a testFile\n$_t\n$_t\n" "" "" 46 47# For the rest, just toggle the bits back and forth (where supported). 48# Note that some file system/kernel combinations do return success but 49# silently ignore your request: +T on 4.19 f2fs, or +F on 5.2 ext4, 50# for example, so we're deliberately a bit selective here. 51# f2fs in 5.6+ kernels supports compression, but you can only enable 52# compression on a file while it's still empty, so we skip +c too. 53for attr in "A" "d" "e" "j" "P" "S" "s" "t" "u"; do 54 echo "$_t" > testFile && chattr +$attr testFile 2>/dev/null || SKIPNEXT=1 55 # Check that $attr is in the lsattr output, then that - turns it back off. 56 testing "toggle $attr" "lsattr testFile | awk '{print \$1}' > attrs; 57 grep -q $attr attrs || cat attrs; cat testFile && chattr -$attr testFile && 58 lsattr testFile | clean; rm -rf testFile" "$_t\n$_empty testFile\n" "" "" 59done 60 61_aA="-----a-A------------" 62testing "multiple bits" "$IN && touch testFile && 63 chattr +Aa testFile && lsattr testFile | clean && 64 chattr -Aa testFile && lsattr testFile | clean; 65 rm -rf testFile; $OUT" "$_aA testFile\n$_empty testFile\n" "" "" 66 67testing "multiple files" "$IN && touch fileA && touch fileB && 68 chattr +Aa fileA fileB && lsattr fileA fileB | clean && 69 chattr -Aa fileA fileB && lsattr fileA fileB | clean; 70 rm -rf testFile*; $OUT" \ 71 "$_aA fileA\n$_aA fileB\n$_empty fileA\n$_empty fileB\n" "" "" 72 73touch testFile; chattr -v 1234 testFile 2>/dev/null || SKIPNEXT=1 74testing "-v version" "lsattr -v testFile | awk '{print \$1}' && 75 chattr -v 4567 testFile && lsattr -v testFile | awk '{print \$1}'; 76 rm -rf testFile" "1234\n4567\n" "" "" 77 78mkdir -p a/b/c && touch a/b/c/fA a/b/c/fB 79testing "-R" "chattr -R +a a && lsattr a/b/c/fA a/b/c/fB | clean && 80 chattr -R -a a && rm -rf a" \ 81 "$_a a/b/c/fA\n$_a a/b/c/fB\n" "" "" 82rm -rf a 83 84# Clean up 85rm -rf testattr 86