1 files changed, 74 insertions, 1 deletions
diff --git a/hypodermic/main.py b/hypodermic/main.py
index 05d467a..b0d709b 100644
--- a/hypodermic/main.py
+++ b/hypodermic/main.py
@@ -15,6 +15,79 @@
 # You should have received a copy of the GNU General Public License along
 # with Hypodermic. If not, see <http://www.gnu.org/licenses/>.
 
+"""Command-line interface to Hypodermic."""
+
+import argparse
+import sys
+import textwrap
+import pprint #
+
+from hypodermic.memory import maps
+from hypodermic.ptrace import Process
+
+
+class CustomHelp(argparse.HelpFormatter):
+    """Modifications to argparse's default HelpFormatter."""
+    def _fill_text(self, text, width, indent):
+        filled = []
+        for line in text.splitlines(keepends=True):
+            filled.append(indent + line)
+        return "".join(filled)
+
+    def _split_lines(self, text, width):
+        return text.splitlines()
+
+    def add_usage(self, usage, actions, groups, prefix=None):
+        prefix = prefix or "Usage: "
+        both = super(CustomHelp, self)
+        return both.add_usage(usage, actions, groups, prefix)
+
 
 def main():
-    print("Don't share needles, brah!")
+    parser = argparse.ArgumentParser(
+        add_help=False,
+        formatter_class=CustomHelp,
+        usage="%(prog)s [-a pid] [-c path] [options]",
+        description="Don't share needles, brah!"
+    )
+
+    doc = parser.add_argument_group("Documentation")
+    doc.add_argument(
+        "-h",
+        "--help",
+        action="help",
+        help="Display this help page and exit."
+    )
+    doc.add_argument(
+        "-V",
+        "--version",
+        action="version",
+        version="What version?",
+        help="Display the currently installed version and exit."
+    )
+
+    proc = parser.add_argument_group("Process Manipulation")
+    meth = proc.add_mutually_exclusive_group()
+    proc.add_argument(
+        "-a",
+        "--attach",
+        metavar="PID",
+        help="The pid of a process to attach to."
+    )
+    proc.add_argument(
+        "-c",
+        "--create",
+        metavar="BIN",
+        help="The path of a binary to execute and attach to."
+    )
+
+    args = parser.parse_args()
+
+    if args.attach is None and args.create is None:
+        print("No action specified. Quitting!")
+        sys.exit(1)
+
+    if args.create:
+        p = Process(path=args.create)
+    else:
+        p = Process(pid=args.attach)