How to tell whether a file is a soft symbolic link in shell script All In One
shell 脚本中如何判断一个文件是否是
软链接/ 软符号链接
error
软链接自动指向原文件bug ❌
# 软链接
$ test ./test.sh -ef ./test-soft-link.sh
$ echo $?
0
# 硬链接 ❌
$ test ./test.sh -ef ./test-hard-link.sh
$ echo $?
0
#!/usr/bin/env bash
# 软链接 bug ❌ 自动指向原文件
echo "./test.sh -ef ./test-soft-link.sh"
# if [ ./test.sh -ef ./test-soft-link.sh ]; then
if [[ ./test.sh -ef ./test-soft-link.sh ]]; then
echo "yes ✅"
else
echo "no ❌"
fi
echo "./test.sh -ef ./test-hard-link.sh"
# if [ ./test.sh -ef ./test-hard-link.sh ]; then
if [[ ./test.sh -ef ./test-hard-link.sh ]]; then
echo "yes ✅"
else
echo "no ❌"
fi
# 单方括号 [] ✅
echo "[ ./test.sh -ef ./test-demo.sh ]"
if [ ./test.sh -ef ./test-demo.sh ]; then
echo "yes ✅"
else
echo "no ❌"
fi
# 双方括号 [[]] ✅
echo "[[ ./test.sh -ef ./test-demo.sh ]]"
if [[ ./test.sh -ef ./test-demo.sh ]]; then
echo "yes ✅"
else
echo "no ❌"
fi
solution
# soft symbol link ✅
eric@rpi4b:~ $ [ -L ./test-soft-link.sh ] && [ -e ./test-soft-link.sh ]
eric@rpi4b:~ $ echo $?
0
# hard symbol link ❌
eric@rpi4b:~ $ [ -L ./test-hard-link.sh ] && [ -e ./test-hard-link.sh ]
eric@rpi4b:~ $ echo $?
1
demos
eric@rpi4b:~ $ ls -ali | grep test
24553 -rw-r--r-- 1 eric eric 411 9月 21 11:37 nvm_echo_test.sh
30221 -rwxr-xr-x 1 eric eric 172 9月 21 18:03 shell-env-variable-test.sh
30331 -rwxr-xr-x 1 eric eric 47 10月 25 00:26 test-demo.sh
24592 -rwxr-xr-x 2 eric eric 156 9月 21 13:15 test-hard-link.sh
24592 -rwxr-xr-x 2 eric eric 156 9月 21 13:15 test.sh
23662 lrwxrwxrwx 1 eric eric 7 10月 8 16:44 test-soft-link.sh -> test.sh
eric@rpi4b:~ $ test ./test.sh -ef ./test-soft-link.sh
eric@rpi4b:~ $ echo $?
0
eric@rpi4b:~ $
(? 反爬虫测试！打击盗版⚠️）如果你看到这个信息, 说明这是一篇剽窃的文章，请访问 https://www.cnblogs.com/xgqfrms/ 查看原创文章！
refs
https://stackoverflow.com/questions/5767062/how-to-check-if-a-symlink-exists
©xgqfrms 2012-2021
www.cnblogs.com/xgqfrms 发布文章使用：只允许注册用户才可以访问！
原创文章，版权所有©️xgqfrms, 禁止转载 ?️，侵权必究⚠️！