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Expect 脚本不会更改 Solaris 上的密码

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Expect 脚本不会更改 Solaris 上的密码

我有一个从 Linux 计算机运行的脚本，用于更改可通过 ssh 访问的远程 Solaris 计算机上的 root 密码。一切似乎都很好，passwd 命令要求输入密码，第二个密码，回复长度不是 8 个字符，并以 ... 结束，更新成功，但是当我转到 Solaris 并检查时，密码没有更改。影子文件没有被修改。我可以直接在 Solaris 机器上更改密码，没有任何问题。

$ cat ./expect2.txt
#!/usr/bin/expect --
# Input: username password hostname
set USER [lindex $argv 0]
set PASS [lindex $argv 1]
set IP   [lindex $argv 2]
  
spawn ssh user1@$IP
expect "user1" 
spawn sudo passwd $USER
expect "assword:"
send "$PASS\r"
expect "assword:"
send "$PASS\r"
expect eof

exit
exit

我运行脚本：

$ expect  ./expect2.txt root abc123 host1
spawn ssh user1@host1
host1 user1 : spawn sudo passwd root
Changing password for user root.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.

调试

$ expect -d ./expect2.txt root abc123 host1
expect version 5.45.4
argv[0] = expect  argv[1] = -d  argv[2] = ./expect2.txt  argv[3] = root  argv[4] = abc123  argv[5] = host1
set argc 3
set argv0 "./expect2.txt"
set argv "root abc123 host1"
executing commands from command file ./expect2.txt
spawn ssh user1@host1
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {2669765}

expect: does "" (spawn_id exp4) match glob pattern "user1"? no
match glob pattern "user1"? yes
expect: set expect_out(0,string) "user1"
expect: set expect_out(spawn_id) "exp4"
spawn sudo passwd root
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {2669769}

expect: does "" (spawn_id exp7) match glob pattern "assword:"? no
Changing password for user root.
New password:
expect: does "Changing password for user root.\r\nNew password: " (spawn_id exp7) match glob pattern "assword:"? yes
expect: set expect_out(0,string) "assword:"
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) "Changing password for user root.\r\nNew password:"
send: sending "abc123\r" to { exp7 }

expect: does " " (spawn_id exp7) match glob pattern "assword:"? no

BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
expect: does " \r\nBAD PASSWORD: The password is shorter than 8 characters\r\nRetype new password: " (spawn_id exp7) match glob pattern "assword:"? yes
expect: set expect_out(0,string) "assword:"
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) " \r\nBAD PASSWORD: The password is shorter than 8 characters\r\nRetype new password:"
send: sending "abc123\r" to { exp7 }

passwd: all authentication tokens updated successfully.
expect: read eof
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) " \r\npasswd: all authentication tokens updated successfully.\r\n"

答案1

这将启动与 表示的主机的远程会话$IP：

spawn ssh user1@$IP
expect "user1"

这开始新会话更改由 表示的用户的密码$USER：

spawn sudo passwd $USER
expect "assword:"

请注意，这两个会话是相互独立的，并且您正在$USER本地主机上更改密码。你可能是有意的send而不是spawn。

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