如何从 expect 脚本关闭 stdin

问：

问题是如何从期望脚本中输入命令并通知它有关EOF的信息。cat

脚本：

#!/usr/bin/expect

spawn bash -c "echo READY; foo=\$(cat); echo DONE"
expect "READY\r\n"
send -- "Hello\n"

# This doesn't work
send \004

# This timesout
expect "DONE\r\n"

send \004什么也不做。显然，没有什么可以将此控制序列转换为 EOF。如何修复/解决它？

使用以下命令运行脚本：expect -d

$ expect -d test.exp
expect version 5.45
argv[0] = expect  argv[1] = -d  argv[2] = test.exp
set argc 0
set argv0 "test.exp"
set argv ""
executing commands from command file test.exp
spawn bash -c echo READY; foo=$(cat); echo DONE
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {36656}

expect: does "" (spawn_id exp4) match glob pattern "READY\r\n"? no
READY

expect: does "READY\r\n" (spawn_id exp4) match glob pattern "READY\r\n"? yes
expect: set expect_out(0,string) "READY\r\n"
expect: set expect_out(spawn_id) "exp4"
expect: set expect_out(buffer) "READY\r\n"
send: sending "Hello\n" to { exp4 }
send: sending "\u0004" to { exp4 }

expect: does "" (spawn_id exp4) match glob pattern "DONE\r\n"? no
Hello

expect: does "Hello\r\n" (spawn_id exp4) match glob pattern "DONE\r\n"? no
expect: timed out

更新该问题是特定于 cygwin 的。它通过添加后得到解决：sleep 1send -- "Hello\n"

#!/usr/bin/expect

spawn bash -c "echo READY; foo=\$(cat); echo DONE"
expect "READY\r\n"
send -- "Hello\n"
sleep 1

# This doesn't work on cygwin without prior "sleep 1"
send \004
expect "DONE\r\n"
exit