From 8a8c8ec758b5a03cfc1a47a92e74c53ba44942e0 Mon Sep 17 00:00:00 2001
From: JaydenMW <jaydenmw@noreply.codeberg.org>
Date: Sun, 14 Feb 2021 03:30:20 +0100
Subject: [PATCH] Upload files to ''

---
 shell.py | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 shell.py

diff --git a/shell.py b/shell.py
new file mode 100644
index 0000000..64491d8
--- /dev/null
+++ b/shell.py
@@ -0,0 +1,115 @@
+"""pclish: a simple shell written in Python"""
+
+import os
+import subprocess
+import psutil
+import platform
+
+# Get System Information
+RAM = psutil.virtual_memory()
+CPU = platform.processor()
+
+# Command Interpretation -- This is the core of the shell
+def execute_command(command):
+    """execute commands and handle piping"""
+    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: {}".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))
+
+
+# Commands - Commands are defined here.
+def pclish_cd(path):
+    """convert to absolute path and change directory"""
+    try:
+        os.chdir(os.path.abspath(path))
+    except Exception:
+        print("cd: no such file or directory: {}".format(path))
+
+
+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""")
+
+def pclish_ls():
+    print("""pclish: this feature is not yet supported""")
+
+def pclish_ver():
+    print("""pclish: version 0.0.1a.""")
+
+def pclish_mkdir():
+    value = input("What would you like to name this new directory:\n")
+    dir = value
+    os.mkdir(dir)
+
+def pclish_system():
+    print("""System: XCU Python Based Shell Env""")
+    print("RAM:")
+    print(RAM)
+    print("CPU:")
+    print(CPU)
+    
+
+def pclish_shtdwnsubsys():
+    print("Shutting Down XCU Python Based Shell Env")
+    exit()
+
+# Shell Prompt Customization and step 2 of command interpritation
+def main():
+    while True:
+        inp = input("shell@system >> ")
+        if inp == "exit":
+            break
+        elif inp[:3] == "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()
+        else:
+            execute_command(inp)
+
+
+# Main
+if '__main__' == __name__:
+    main()