Systems Programming Repository

Repository Structure

flash_shell/ (Final Project: FLASH - Flame Shell)

• Custom shell written in C with support for:
  • Simple commands
  • Background execution (# suffix)
  • Command sequences (, separator)
  • Pipes (— separator)
  • Input/output redirection (>, <)
  • Basic environment variable management

file_ops/ (Single File Operations)

• Program: my_fm.c
• Operations on a single file or directory:
  • Create, rename, delete
  • Append text or binary data
  • Read and print first 50 bytes

bulk_file_ops/ (Multi File Operations)

• Program: my_bfm.c
• Bulk file and directory management:
  • Create, rename, delete (including non-empty directories)
  • Append data to files
  • Maintain a log of actions performed

process_mgmt/ (Processes Assignment)

• Program: my_cmd.c
• Executing binaries with process control:
  • Run in foreground or background
  • Capture and print process details:
    • Command-line received
    • Child process ID
    • Exit code

ipc_pipes/ (Pipelines - Inter-Process Communication)

• Program: my_ipc.c
• Implementing IPC using pipe() for command chaining:
  • Handles a data generator (cmd1) and a data consumer (cmd2)
  • Uses system calls like open(), close(), dup2(), fork(), exec(), and waitpid()

file_copy/ (File Copy Utility)

• Efficiently copies files (text and binary) with system calls

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Course: Systems Programming
Instructor: Abhijat Vichare (Visiting Faculty)
University: FLAME University

Each program follows UNIX system calls, does not define custom error codes, and was developed collaboratively, emphasizing low-level system programming, process management, and IPC mechanisms.