tests/ls/stat-free-color.sh

   1 #!/bin/sh
   2 # Show that --color need not use stat, as long as we have d_type support.
   3
   4 # Copyright (C) 2011-2023 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ ls
  21 require_strace_ stat
  22 require_dirent_d_type_
  23
  24 stats='stat'
  25 # List of other _file name_ stat functions to increase coverage.
  26 other_stats='statx lstat stat64 lstat64 newfstatat fstatat64'
  27 for stat in $other_stats; do
  28   strace -qe "$stat" true > /dev/null 2>&1 &&
  29     stats="$stats,$stat"
  30 done
  31
  32 # Disable enough features via LS_COLORS so that ls --color
  33 # can do its job without calling stat (other than the obligatory
  34 # one-call-per-command-line argument).
  35 cat <<EOF > color-without-stat || framework_failure_
  36 RESET 0
  37 DIR 01;34
  38 LINK 01;36
  39 FIFO 40;33
  40 SOCK 01;35
  41 DOOR 01;35
  42 BLK 40;33;01
  43 CHR 40;33;01
  44 ORPHAN 00
  45 SETUID 00
  46 SETGID 00
  47 CAPABILITY 00
  48 STICKY_OTHER_WRITABLE 00
  49 OTHER_WRITABLE 00
  50 STICKY 00
  51 EXEC 00
  52 MULTIHARDLINK 00
  53 EOF
  54 eval $(dircolors -b color-without-stat)
  55
  56 # The system may perform additional stat-like calls before main.
  57 # Furthermore, underlying library functions may also implicitly
  58 # add an extra stat call, e.g. opendir since glibc-2.21-360-g46f894d.
  59 # Finally, ls(1) makes a stat call for stdout, but only in the case
  60 # when there is something to output.
  61 # To get the comparison right, first get a baseline count for running
  62 # 'ls -a' with one empty directory argument.  Then, compare that with
  63 # the invocation under test.
  64 mkdir d || framework_failure_
  65
  66 count_stats() { grep -vE '\+\+\+|ENOSYS|NOTSUP' "$1" | wc -l; }
  67 strace -q -o log1 -e $stats ls -a --color=always d || fail=1
  68 n_stat1=$(count_stats log1) || framework_failure_
  69
  70 test $n_stat1 = 0 \
  71   && skip_ 'No stat calls recognized on this platform'
  72
  73 # Populate the test directory.
  74 mkdir d/subdir \
  75   && touch d/regf \
  76   && ln d/regf d/hlink \
  77   && ln -s regf d/slink \
  78   && ln -s nowhere d/dangle \
  79   || framework_failure_
  80
  81 # Invocation under test.
  82 strace -q -o log2 -e $stats ls --color=always d || fail=1
  83 n_stat2=$(count_stats log2) || framework_failure_
  84
  85 # Expect the same number of stat calls.
  86 test $n_stat1 = $n_stat2 \
  87   || { fail=1; head -n30 log*; }
  88
  89 Exit $fail