1 files changed, 75 insertions, 0 deletions
diff --git a/tests/ls/stat-free-symlinks.sh b/tests/ls/stat-free-symlinks.sh
new file mode 100755
index 0000000..706d415
--- /dev/null
+++ b/tests/ls/stat-free-symlinks.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+# ensure that ls does not stat a symlink in an unusual case
+
+# Copyright (C) 2007-2022 Free Software Foundation, Inc.
+
+# 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 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ ls
+require_strace_ stat
+
+stats='stat'
+# List of other _file name_ stat functions to increase coverage.
+other_stats='statx lstat stat64 lstat64 newfstatat fstatat64'
+for stat in $other_stats; do
+  strace -qe "$stat" true > /dev/null 2>&1 &&
+    stats="$stats,$stat"
+done
+
+# The system may perform additional stat-like calls before main.
+# Furthermore, underlying library functions may also implicitly
+# add an extra stat call, e.g. opendir since glibc-2.21-360-g46f894d.
+# To avoid counting those, first get a baseline count for running
+# ls with one empty directory argument.  Then, compare that with the
+# invocation under test.
+mkdir d || framework_failure_
+strace -q -o log1 -e $stats ls -F --color=always d || fail=1
+n_stat1=$(grep -vF '+++' log1 | wc -l) || framework_failure_
+
+test $n_stat1 = 0 \
+  && skip_ 'No stat calls recognized on this platform'
+
+
+touch x || framework_failure_
+chmod a+x x || framework_failure_
+ln -s x link-to-x || framework_failure_
+
+
+# ls from coreutils 6.9 would unnecessarily stat a symlink in an unusual case:
+# When not coloring orphan and missing entries, and without ln=target,
+# ensure that ls -F (or -d, or -l: i.e., when not dereferencing)
+# does not stat a symlink to directory, and does still color that
+# symlink and an executable file properly.
+
+LS_COLORS='or=0:mi=0:ex=01;32:ln=01;35' \
+  strace -qe $stats -o log2 ls -F --color=always x link-to-x > out.tmp || fail=1
+n_stat2=$(grep -vF '+++' log2 | wc -l) || framework_failure_
+
+# Expect one more stat call,
+# which failed with coreutils 6.9 and earlier, which had 2.
+test $n_stat1 = $(($n_stat2 - 1)) \
+  || { fail=1; head -n30 log*; }
+
+# Check that output is colored, as requested, too.
+{
+  printf '\033[0m\033[01;35mlink-to-x\033[0m@\n'
+  printf '\033[01;32mx\033[0m*\n'
+} > exp || fail=1
+# Elide info messages strace can send to stdout of the form:
+#   [ Process PID=1234 runs in 32 bit mode. ]
+sed '/Process PID=/d' out.tmp > out
+compare exp out || fail=1
+
+Exit $fail