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#!/bin/bash
[ -f testing.sh ] && . testing.sh
#testing "name" "command" "result" "infile" "stdin"
# we only test with -k since getting POSIX version is variable
# POSIXLY_CORRECT is sometimes needed, sometimes -P is needed,
# while -k is the default on most Linux systems
mkdir -p du_test/test du_2/foo
testing "(no options)" "du -k du_test" "4\tdu_test/test\n8\tdu_test\n" "" ""
testing "-s" "du -k -s du_test" "8\tdu_test\n" "" ""
ln -s ../du_2 du_test/xyz
# "du shall count the size of the symbolic link"
# The tests assume that like for most POSIX systems symbolic
# links are stored directly in the inode so that the
# allocated file space is zero.
testing "counts symlinks without following" "du -ks du_test" "8\tdu_test\n" "" ""
testing "-L follows symlinks" "du -ksL du_test" "16\tdu_test\n" "" ""
ln -s . du_test/up
testing "-L avoid endless loop" "du -ksL du_test" "16\tdu_test\n" "" ""
rm du_test/up
# if -H and -L are specified, the last takes priority
testing "-HL follows symlinks" "du -ksHL du_test" "16\tdu_test\n" "" ""
testing "-H does not follow unspecified symlinks" "du -ksH du_test" "8\tdu_test\n" "" ""
testing "-LH does not follow unspecified symlinks" "du -ksLH du_test" "8\tdu_test\n" "" ""
testing "-H follows specified symlinks" "du -ksH du_test/xyz" "8\tdu_test/xyz\n" "" ""
rm -rf du_test du_2
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