为什么“clpasswd”不知道“-R”?

为什么“clpasswd”不知道“-R”?

有一个符号链接:

2:root@SERVER:/root # ls -la /usr/bin/passwd
lrwxrwxrwx    1 root     system           39 Feb  3 2014  /usr/bin/passwd -> /usr/es/sbin/cluster/utilities/clpasswd
2:root@SERVER:/root #

还有原始的二进制文件:

2:root@SERVER:/root # ls -la /usr/es/sbin/cluster/utilities/clpasswd
-rwsr-xr-x    1 root     system       413726 Aug 29 2013  /usr/es/sbin/cluster/utilities/clpasswd
2:root@SERVER:/root # 

符号链接知道“-R”:

2:root@SERVER:/root # /usr/bin/passwd -R files root
Changing password for "root"
root's New password:
Terminating from signal
2:root@SERVER:/root # 

clpasswd,原始二进制文件不知道“-R”

2:root@SERVER:/root # /usr/es/sbin/cluster/utilities/clpasswd -R files root
/usr/es/sbin/cluster/utilities/clpasswd: illegal option -- R


Usage: clpasswd cluster_user [ -g ResourceGroup ]
Where:
    -g ResourceGroup - Update on participating nodes only
                       Otherwise all cluster nodes receive update

2:root@SERVER:/root # 

当符号链接知道“-R”选项时,为什么原始二进制文件不知道它?

我们也尝试过硬链接,但没有成功。

答案1

二进制文件检查其文件名。

0:root@SERVER:/root # ln -s /usr/es/sbin/cluster/utilities/clpasswd /tmp/passwd
0:root@SERVER:/root # /tmp/passwd -R files root
Changing password for "root"
root's New password:
Terminating from signal
0:root@SERVER:/root # mv /tmp/passwd /tmp/clpasswd
0:root@SERVER:/root # /tmp/clpasswd -R files root
/tmp/clpasswd: illegal option -- R


Usage: clpasswd cluster_user [ -g ResourceGroup ]
Where:
    -g ResourceGroup - Update on participating nodes only
                       Otherwise all cluster nodes receive update

0:root@SERVER:/root #  

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