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#!/bin/sh
# Test "ln -sf".
# Copyright (C) 1997-2020 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_ ln
echo foo > a || framework_failure_
# Check that a target directory of '.' is supported
# and that indirectly specifying the same target and link name
# through that is detected.
ln -s . b || framework_failure_
ln -sf a b > err 2>&1 && fail=1
case $(cat err) in
*'are the same file') ;;
*) fail=1 ;;
esac
# Ensure we replace symlinks that don't or can't link to an existing target.
# coreutils-8.22 would fail to replace {ENOTDIR,ELOOP,ENAMETOOLONG}_link below.
# We apply a limit since AIX returns 2^32-1 which would trigger resource issues.
name_max=$(stat -f -c %l .) && test "$name_max" -lt $((1024*1024)) ||
name_max=1 # skip this portion of the test
name_max_plus1=$(expr $name_max + 1)
long_name=$(printf '%*s' $name_max_plus1 | tr ' ' '0')
for f in '' f; do
ln -s$f missing ENOENT_link || fail=1
ln -s$f a/b ENOTDIR_link || fail=1
ln -s$f ELOOP_link ELOOP_link || fail=1
ln -s$f "$long_name" ENAMETOOLONG_link || fail=1
done
Exit $fail
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