Python Command Line Shell - A shell written in python
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#!/usr/bin/env python3
# PCLISH - Python Command Line Shell
import os
import subprocess
import psutil
import platform
import socket
RAM = psutil.virtual_memory()
CPU = platform.processor()
OS = platform.system()
HOST = socket.gethostname()
VER = "PCLISH v0.0.6a-hotfix1a"
PROMPT = "shell@{}$ ".format(HOST)
def execute_command(command):
try:
if "|" in command:
s_in, s_out = (0, 0)
s_in = os.dup(0)
s_out = os.dup(1)
fdin = os.dup(s_in)
for cmd in command.split("|"):
os.dup2(fdin, 0)
os.close(fdin)
if cmd == command.split("|")[-1]:
fdout = os.dup(s_out)
else:
fdin, fdout = os.pipe()
os.dup2(fdout, 1)
os.close(fdout)
try:
subprocess.run(cmd.strip().split())
except Exception:
print("pclish: command not found, run the help command for a list of commands: {}".format(cmd.strip()))
os.dup2(s_in, 0)
os.dup2(s_out, 1)
os.close(s_in)
os.close(s_out)
else:
subprocess.run(command.split(" "))
except Exception:
print("pclish: command not found: {}".format(command))
def pclish_cd(path):
try:
os.chdir(os.path.abspath(path))
except Exception:
print("cd: no such file or directory: {}".format(path))
def pclish_echo():
TXT = input("ARGS: ")
print(TXT)
def pclish_oscmd():
CMD = input("ARGS: ")
os.system(CMD)
def pclish_help():
print("""pclish: here are the commands available
help: shows this page
cd: change directory
ver: displays shell version
ls: lists files in current dir
system: shows system information
mkdir: creates a directory
shtdwnsubsys: shuts down the sub system
oscmd: allows you to run an OS level command""")
def pclish_ls():
print("pclish: this feature is not yet supported")
def pclish_ver():
print(VER)
def pclish_mkdir():
DIR = input("ARGS: ")
os.mkdir(DIR)
def pclish_system():
print("HOSTNAME:" + HOST)
print("System: PCLISH SUBSYSTEM")
print("RAM:" + RAM)
print("CPU:" + CPU)
print("OS:" + OS)
print("SHELL:" + VER)
def pclish_shtdwnsubsys():
print("Exiting to..." + OS)
exit()
def main():
while True:
inp = input(PROMPT)
if inp == "exit":
break
elif inp == "cd ":
pclish_cd(inp[3:])
elif inp == "help":
pclish_help()
elif inp == "ver":
pclish_ver()
elif inp == "ls":
pclish_ls()
elif inp == "mkdir":
pclish_mkdir()
elif inp == "shtdwnsubsys":
pclish_shtdwnsubsys()
elif inp == "system":
pclish_system()
elif inp == "echo":
pclish_echo()
elif inp == "oscmd":
pclish_oscmd()
else:
execute_command(inp)
# Main
if '__main__' == __name__:
main()