System Utilities

/**
 * Display system information
 * WebAssembly binary: dist/wasm/bin/uname
 * 
 * Usage patterns:
 * - uname [options]
 * - Supports -a (all info), -s (system), -n (node), -r (release)
 * - Shows system name, version, and architecture information
 */

/**
 * Display user and group IDs
 * WebAssembly binary: dist/wasm/bin/id
 * 
 * Usage patterns:
 * - id [options] [user]
 * - Supports -u (user ID), -g (group ID), -G (all groups)
 * - Shows effective and real user/group information
 */

/**
 * Display login name
 * WebAssembly binary: dist/wasm/bin/logname
 * 
 * Usage patterns:
 * - logname
 * - Displays the current user's login name
 * - Gets name from login session information
 */

/**
 * Display or modify environment
 * WebAssembly binary: dist/wasm/bin/env
 * 
 * Usage patterns:
 * - env [options] [variable=value...] [command [args...]]
 * - Supports -i (ignore environment), -u (unset variable)
 * - Can run commands with modified environment
 * - Note: execvp functionality limited in WebAssembly context
 */

/**
 * Display or set system date
 * WebAssembly binary: dist/wasm/bin/date
 * 
 * Usage patterns:
 * - date [options] [+format]
 * - date [options] [date_string]
 * - Supports custom formatting with strftime format specifiers
 * - Can parse and display dates in various formats
 */

/**
 * Display terminal device name
 * WebAssembly binary: dist/wasm/bin/tty
 * 
 * Usage patterns:
 * - tty [options]
 * - Supports -s (silent mode)
 * - Shows the file name of the terminal connected to stdin
 */

/**
 * Display directory space usage
 * WebAssembly binary: dist/wasm/bin/du
 * 
 * Usage patterns:
 * - du [options] [directory...]
 * - Supports -h (human readable), -s (summary), -a (all files)
 * - Calculates disk usage for directories and files
 */

/**
 * Locate commands in PATH
 * WebAssembly binary: dist/wasm/bin/which
 * 
 * Usage patterns:
 * - which [options] command...
 * - Supports -a (all matches), -s (silent mode)
 * - Shows the full path of executable commands
 */

const { path } = require("@cowasm/coreutils");
const { join } = require("path");

// Access system utility binaries
const binPath = join(path, "bin");
const unameBinary = join(binPath, "uname");
const idBinary = join(binPath, "id");
const dateBinary = join(binPath, "date");

// These would be executed via your WebAssembly runtime

# System identification
uname -a                    # Full system information
uname -s                    # System name only

# User context
id                          # Current user and group IDs
logname                     # Login name

# Environment inspection
env                         # All environment variables
env | grep PATH             # PATH variable specifically

# Date and time
date                        # Current date and time
date "+%Y-%m-%d %H:%M:%S"   # Custom format

# Disk usage
du -sh /path/to/directory   # Directory size summary
du -h /path/to/directory    # Human-readable directory usage

# Command location
which ls                    # Find ls command location

# Run command with modified environment
env PATH="/custom/path:$PATH" command

# Run command with clean environment
env -i HOME="$HOME" PATH="/bin:/usr/bin" command

# Unset specific variables
env -u TEMP_VAR command

# Various date formats
date "+%Y-%m-%d"           # 2023-12-25
date "+%H:%M:%S"           # 14:30:45
date "+%A, %B %d, %Y"      # Monday, December 25, 2023
date "+%s"                 # Unix timestamp