我有一个BASH脚本，它是伪终端的实现。整个脚本模拟了另一台设备上嵌入式操作系统中的登录和运行命令。
此处是向用户显示提示并接受输入的功能：
function mterm
{
# Interactive psuedo-terminal for sending commands to stbox.
#
# An endless loop prompts user for input.
# The prompt displayed is the IP address of the target and '>'.
# Commands consisting of pipes (|) and redirects (>) are parsed
# such that the first command is sent to "parsecommand" function,
# and the output of that function is piped or redirected to the
# remaining items on the command line which was entered by the
# user at the prompt.
#
# The commands entered by the user at the prompt are saved
# in a "history" file defined by the HIST* variables below. The
# user should be able to recall previous commands (and edit them
# if desired) by using the arrow keys.
export HISTFILE=~/.gsi_history
export HISTTIMEFORMAT="%d/%m/%y %T "
export HISTCONTROL=ignoreboth:erasedups
export HISTSIZE=10000
export HISTFILESIZE=100000
history -r ${HISTFILE}
while read -ep "${1}> " CMD
do
history -s "${CMD}"
s="[|>]"
if [[ ${CMD} =~ ${s} ]]
then
CMD1=${CMD%%[>|]*}
CMD2=${CMD#${CMD1}}
CMD1=$(echo ${CMD1}|xargs) # To remove any leading or training whitespaces.
eval "parsecommand \"${CMD1}\"${CMD2}"
else
parsecommand "${CMD}"
fi
done
history -w ${HISTFILE}
}
我正在尝试在python中做类似的事情。这是我到目前为止的内容：
#!/usr/bin/python
import sys
import signal
import time
def handler(signum, frame):
print "Exiting"
exit(0)
signal.signal(signal.SIGINT, handler)
f=sys.stdin
while 1:
print "> ",
CMD=f.readline()
if not CMD: break
print("CMD: %s" % CMD)
这有效。它接受输入命令并打印出键入的内容。因此可以将“ CMD”传递给另一个函数以对其进行解析。如果键入CTRL-D，则它将结束，就像BASH脚本一样。
但是，就像BASH脚本一样，我想要一个历史记录文件和命令调用（当然使用向上箭头）。
我想我可以每次简单地手动将“ CMD”附加到历史文件中。然后，我只需要担心命令调用即可。
是否有一种很好且简单的“ pythonic”方式来执行BASH脚本？
谢谢。