uname: Add uname.py

Author: Expertcoderz

src/uname.py

@@ -0,0 +1,81 @@
+#!/usr/bin/python3
+
+import os
+import platform
+import sys
+from optparse import OptionParser
+
+UNAME_ATTRS = frozenset("mnrsv")
+
+
+def uname(opts):
+    extras: list[str] = []
+
+    if opts.a:
+        for attr in UNAME_ATTRS:
+            setattr(opts, attr, True)
+
+    if opts.a or opts.p:
+        if processor := platform.processor():
+            extras.append(processor)
+        elif opts.p:
+            extras.append("unknown")
+
+    if opts.i:
+        extras.append("unknown")
+
+    if opts.o:
+        extras.append("unknown")
+
+    if not extras and not any({getattr(opts, attr) for attr in UNAME_ATTRS}):
+        opts.s = True
+
+    uname = os.uname()
+
+    print(
+        " ".join(
+            [
+                getattr(uname, attribute)
+                for attribute in [
+                    "sysname",
+                    "nodename",
+                    "release",
+                    "version",
+                    "machine",
+                ]
+                if getattr(opts, attribute[0])
+            ]
+            + extras
+        )
+    )
+
+
+if __name__ == "__main__":
+    parser = OptionParser(
+        usage="Usage: %prog [OPTION]...",
+        description="Print system information.",
+        add_help_option=False,
+    )
+    parser.add_option("--help", action="help", help="show usage information and exit")
+
+    parser.add_option("-a", action="store_true", help="print all")
+    parser.add_option("-m", action="store_true", help="machine hardware type")
+    parser.add_option("-n", action="store_true", help="hostname")
+    parser.add_option("-r", action="store_true", help="kernel release")
+    parser.add_option("-s", action="store_true", help="kernel name (default)")
+    parser.add_option("-v", action="store_true", help="kernel version")
+    parser.add_option("-p", action="store_true", help="processor type")
+    parser.add_option(
+        "-i", action="store_true", help="hardware platform (unimplemented)"
+    )
+    parser.add_option(
+        "-o", action="store_true", help="operating system (unimplemented)"
+    )
+
+    opts, args = parser.parse_args()
+
+    if args:
+        parser.error(f"extra operand '{args[0]}'")
+        sys.exit(1)
+
+    uname(opts)