Question

我试图将一个期望的脚本回显到一个文件中，这样我就可以动态执行它。

这是我到目前为止所做的：

#!/bin/bash

echo '#!/usr/bin/expect -f' > expect_file
echo 'expect "\[RETURN\]" {send "\r"}' >> expect_file

将产生一个包含以下内容的文件：

#!/usr/bin/expect -f
"}pect "\[RETURN\]" {send "

如果我尝试使用echo并转义引号：

#!/bin/bash

echo '#!/usr/bin/expect -f' > expect_file
echo "expect \"\[RETURN\]\" {send \"\r\"}" >> expect_file

cat expect_file
exit 0

expect命令和部分行不会被回显

#!/usr/bin/expect -f
"}pect "\[RETURN\]" {send "

如何在我的bash脚本中自行回显代码行或将代码行放入文件中？

#!/usr/bin/expect -f
expect "\[RETURN\]" {send "\r"}
expect ":" {send "q"}
expect "otherwise:" {send "y\r"}
expect eof {exit}

Answer 1

不要使用echo。使用cat：

cat << 'EOF' > expect_file
#!/usr/bin/expect -f
expect "\[RETURN\]" {send "\r"}
expect ":" {send "q"}
expect "otherwise:" {send "y\r"}
expect eof {exit}
EOF

Answer 2

使用echo

gst-launch-1.0 -v filesrc location=/home/user/somevideo.mp4 ! qtdemux ! ffdec_mpeg4 ! autovideosink

或

#!/bin/bash echo -e '#!/usr/bin/expect -f\nexpect "\\[RETURN\\]" {send "\\r"}\nexpect ":" {send "q"}\nexpect "otherwise:" {send "y\\r"}\nexpect eof {exit}' > expect_file

或

#!/bin/bash echo '#!/usr/bin/expect -f expect "\[RETURN\]" {send "\r"} expect ":" {send "q"} expect "otherwise:" {send "y\r"} expect eof {exit}' > expect_file

我试图将一个期望脚本回显到一个文件但没有成功

2 个答案: