help.c

#include "holberton.h"
/**
 * help_help - aux function of _help
 * prints msg tp stdout
*/
void help_help(void)
{
	char *msg = "help: help\n\tSee all Shell's Bells builtin commands.\n";

	yellow();
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "\n help [BUILTIN NAME]\n\tSee specific information on each ";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "built-in command.\n";
	write(STDOUT_FILENO, msg, _strlen(msg));
	resetb();
}
/**
 * help_alias - aux function of _help
 * prints msg tp stdout
*/
void help_alias(void)
{
	char *msg = "\n alias: alias\n\tDefine or display aliases.\n";

	yellow();
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "\n alias [-p] [name[=value]...]\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "Without arguments, `alias' prints the list of aliases\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "Otherwise, an alias is defined for each NAME whose VALUE is given\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "trailing space in VAL causes next word to be checked for alias\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "substitution when the alias is expanded.\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "built-in command.\n";
	write(STDOUT_FILENO, msg, _strlen(msg));
	resetb();
}
/**
 * help_history - aux function of _help
 * prints msg tp stdout
*/
void help_history(void)
{
	char *msg = "\n history: history\n\tDefine or display history commands.\n";

	yellow();
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "\n history fc [-e ename] [-lnr] [first] [last]\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "Many programs read input from the user a line at a time\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "The GNU History library is able to keep track of those lines,\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "associate arbitrary data with each line\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "and utilize info from previous lines in composing new ones.\n\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "built-in command.\n";
	write(STDOUT_FILENO, msg, _strlen(msg));
	resetb();
}

/**
 * help_all - aux function of _help
 * prints a collection of msgs to stdout
*/
void help_all(void)
{
	char *msg = "Shell's Bells\nThese shell commands are defined internally.\n";

	green();
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "Type 'help' to see this list.\nType 'help name' to find ";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "out more about the function 'name'.\n\n alias \t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "alias [NAME[='VALUE'] ...]\n cd \tcd ";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "[DIRECTORY]\n exit \texit [STATUS]\n env \tenv";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "\n setenv \tsetenv [VARIABLE] [VALUE]\n unsetenv\t";
	write(STDOUT_FILENO, msg, _strlen(msg));
	msg = "unsetenv [VARIABLE]\t history\n";
	write(STDOUT_FILENO, msg, _strlen(msg));
	resetb();
}
/**
 * _help - function _help, prompts a quick help for built-in commands
 * @args: arguments to be prompted help feature
 * Return: Always 0
*/
int _help(char **args)
{
	char *a = "no help command found for this option\n";

	if (!args[1])
		help_all();
	else if (_strcmp(args[1], "cd") == 0)
		help_cd();
	else if (_strcmp(args[1], "alias") == 0)
		help_alias();
	else if (_strcmp(args[1], "exit") == 0)
		help_exit();
	else if (_strcmp(args[1], "env") == 0)
		help_env();
	else if (_strcmp(args[1], "setenv") == 0)
		help_setenv();
	else if (_strcmp(args[1], "unsetenv") == 0)
		help_unsetenv();
	else if (_strcmp(args[1], "history") == 0)
		help_history();
	else if (_strcmp(args[1], "help") == 0)
		help_help();
	else
		write(STDERR_FILENO, a, _strlen(a));
return (0);
}