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* Give link(1) its own usage message. * Use getprogname(3) instead of rolling our own. * Verify that the target file does not already exist. * Add tests specific to link(1). MFC after: 3 days Sponsored by: Klara, Inc. Reviewed by: allanjude Differential Revision: https://reviews.freebsd.org/D44635
292 lines
6.9 KiB
Bash
292 lines
6.9 KiB
Bash
#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright 2017 Shivansh Rai
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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atf_check_same_file()
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{
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atf_check_equal "$(stat -f %d,%i "$1")" "$(stat -f %d,%i "$2")"
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}
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atf_check_symlink_to()
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{
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atf_check -o inline:"$1\n" readlink "$2"
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}
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atf_test_case L_flag
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L_flag_head()
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{
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atf_set "descr" "Verify that when creating a hard link to a " \
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"symbolic link, '-L' option creates a hard" \
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"link to the target of the symbolic link"
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}
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L_flag_body()
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{
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atf_check touch A
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atf_check ln -s A B
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atf_check ln -L B C
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atf_check_same_file A C
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atf_check_symlink_to A B
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}
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atf_test_case P_flag
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P_flag_head()
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{
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atf_set "descr" "Verify that when creating a hard link to a " \
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"symbolic link, '-P' option creates a hard " \
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"link to the symbolic link itself"
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}
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P_flag_body()
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{
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atf_check touch A
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atf_check ln -s A B
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atf_check ln -P B C
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atf_check_same_file B C
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}
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atf_test_case f_flag
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f_flag_head()
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{
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atf_set "descr" "Verify that if the target file already exists, " \
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"'-f' option unlinks it so that link may occur"
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}
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f_flag_body()
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{
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atf_check touch A B
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atf_check ln -f A B
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atf_check_same_file A B
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}
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atf_test_case target_exists_hard
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target_exists_hard_head()
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{
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atf_set "descr" "Verify whether creating a hard link fails if the " \
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"target file already exists"
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}
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target_exists_hard_body()
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{
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atf_check touch A B
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atf_check -s exit:1 -e inline:'ln: B: File exists\n' \
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ln A B
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}
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atf_test_case target_exists_symbolic
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target_exists_symbolic_head()
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{
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atf_set "descr" "Verify whether creating a symbolic link fails if " \
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"the target file already exists"
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}
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target_exists_symbolic_body()
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{
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atf_check touch A B
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atf_check -s exit:1 -e inline:'ln: B: File exists\n' \
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ln -s A B
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}
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atf_test_case shf_flag_dir
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shf_flag_dir_head() {
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atf_set "descr" "Verify that if the target directory is a symbolic " \
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"link, '-shf' option prevents following the link"
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}
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shf_flag_dir_body()
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{
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atf_check mkdir -m 0777 A B
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atf_check ln -s A C
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atf_check ln -shf B C
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atf_check test -L C
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atf_check -o inline:'B\n' readlink C
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}
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atf_test_case snf_flag_dir
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snf_flag_dir_head() {
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atf_set "descr" "Verify that if the target directory is a symbolic " \
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"link, '-snf' option prevents following the link"
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}
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snf_flag_dir_body()
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{
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atf_check mkdir -m 0777 A B
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atf_check ln -s A C
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atf_check ln -snf B C
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atf_check_symlink_to B C
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}
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atf_test_case sF_flag
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sF_flag_head()
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{
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atf_set "descr" "Verify that if the target file already exists " \
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"and is a directory, then '-sF' option removes " \
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"it so that the link may occur"
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}
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sF_flag_body()
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{
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atf_check mkdir A B
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atf_check ln -sF A B
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atf_check_symlink_to A B
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}
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atf_test_case sf_flag
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sf_flag_head()
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{
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atf_set "descr" "Verify that if the target file already exists, " \
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"'-sf' option unlinks it and creates a symbolic link " \
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"to the source file"
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}
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sf_flag_body()
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{
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atf_check touch A B
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atf_check ln -sf A B
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atf_check_symlink_to A B
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}
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atf_test_case sfF_flag
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sfF_flag_head()
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{
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atf_set "descr" "Verify that if the target file already exists " \
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"and is a symlink, then '-sfF' option removes " \
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"it so that the link may occur"
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}
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sfF_flag_body()
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{
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atf_check mkdir A B C
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atf_check ln -sF A C
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atf_check_symlink_to A C
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atf_check ln -sfF B C
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atf_check_symlink_to B C
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}
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atf_test_case s_flag
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s_flag_head()
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{
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atf_set "descr" "Verify that '-s' option creates a symbolic link"
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}
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s_flag_body()
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{
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atf_check touch A
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atf_check ln -s A B
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atf_check_symlink_to A B
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}
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atf_test_case s_flag_broken
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s_flag_broken_head()
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{
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atf_set "descr" "Verify that if the source file does not exists, '-s' " \
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"option creates a broken symbolic link to the source file"
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}
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s_flag_broken_body()
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{
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atf_check ln -s A B
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atf_check_symlink_to A B
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}
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atf_test_case sw_flag
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sw_flag_head()
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{
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atf_set "descr" "Verify that '-sw' option produces a warning if the " \
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"source of a symbolic link does not currently exist"
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}
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sw_flag_body()
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{
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atf_check -s exit:0 -e inline:'ln: warning: A: No such file or directory\n' \
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ln -sw A B
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atf_check_symlink_to A B
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}
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atf_test_case link_argc
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link_argc_head() {
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atf_set "descr" "Verify that link(1) requires exactly two arguments"
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}
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link_argc_body() {
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atf_check -s exit:1 -e match:"usage: link" \
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link foo
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atf_check -s exit:1 -e match:"No such file" \
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link foo bar
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atf_check -s exit:1 -e match:"No such file" \
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link -- foo bar
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atf_check -s exit:1 -e match:"usage: link" \
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link foo bar baz
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}
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atf_test_case link_basic
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link_basic_head() {
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atf_set "descr" "Verify that link(1) creates a link"
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}
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link_basic_body() {
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touch foo
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atf_check link foo bar
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atf_check_same_file foo bar
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rm bar
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ln -s foo bar
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atf_check link bar baz
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atf_check_same_file foo baz
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}
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atf_test_case link_eexist
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link_eexist_head() {
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atf_set "descr" "Verify that link(1) fails if the target exists"
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}
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link_eexist_body() {
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touch foo bar
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atf_check -s exit:1 -e match:"bar.*exists" \
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link foo bar
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ln -s non-existent baz
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atf_check -s exit:1 -e match:"baz.*exists" \
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link foo baz
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}
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atf_test_case link_eisdir
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link_eisdir_head() {
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atf_set "descr" "Verify that link(1) fails if the source is a directory"
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}
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link_eisdir_body() {
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mkdir foo
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atf_check -s exit:1 -e match:"foo.*directory" \
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link foo bar
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ln -s foo bar
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atf_check -s exit:1 -e match:"bar.*directory" \
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link bar baz
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}
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atf_init_test_cases()
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{
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atf_add_test_case L_flag
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atf_add_test_case P_flag
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atf_add_test_case f_flag
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atf_add_test_case target_exists_hard
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atf_add_test_case target_exists_symbolic
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atf_add_test_case shf_flag_dir
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atf_add_test_case snf_flag_dir
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atf_add_test_case sF_flag
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atf_add_test_case sf_flag
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atf_add_test_case sfF_flag
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atf_add_test_case s_flag
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atf_add_test_case s_flag_broken
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atf_add_test_case sw_flag
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atf_add_test_case link_argc
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atf_add_test_case link_basic
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atf_add_test_case link_eexist
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atf_add_test_case link_eisdir
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}
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