environ.c

#include "shell.h"

/**
 * _env - Print the environment
 * @cmd: The command info
 *
 * Return: 0 on success, -1 on failure
 *
 */
int _env(UCommand *cmd)
{
	char *variable = NULL, *env_var = NULL, *env_val = NULL;
	char *delim = "=", *token = NULL;
	ST_strc *symtab = symtab_stack.global_symtab;
	ST_entry *entry = symtab->first;

	if (cmd->ac == 1)
		while (entry)
		{
			print(entry->name, STDOUT_FILENO);
			print("=", STDOUT_FILENO);
			print(entry->val, STDOUT_FILENO);
			print("\n", STDOUT_FILENO);
			entry = entry->next;
		}
	else
	{
		variable = strdup(cmd->av[1]);
		if (variable == NULL)
		{
			perror("could not get environment variable");
			free(variable);
			return (-1);
		}
		token = strtok(variable, delim);
		env_var = strdup(token);
		token = strtok(NULL, delim);
		env_val = strdup(token);
		entry = get_symtab_entry(env_var);
		if (entry == NULL)
			entry = add_to_symtab(env_var);
		symtab_entry_setval(entry, env_val);

		free(variable);
		free(env_var);
		free(env_val);
	}

	return (0);
}

/**
 * interactive - Check if the shell is interactive
 *	@cmd: The command info
 *
 * Return: 1 if interactive, 0 if not
 */
int interactive(UCommand *cmd)
{
	return ((isatty(STDIN_FILENO) && (cmd->fdd <= 2)));
}

/**
 * set_env - Set a new environment variable or update an existing one
 * @cmd: Command
 *
 * Return: 0 on success, -1 on failure
 */
int set_env(UCommand *cmd)
{
	char *env_var = NULL;
	char *env_val = NULL;
	ST_entry *entry = NULL;

	if (cmd->ac == 3)
	{
		env_var = strdup(cmd->av[1]);
		env_val = strdup(cmd->av[2]);
		if (env_var == NULL)
		{
			perror("could not get environment variable");
			free(env_val);
			free(env_var);
			return (-1);
		}
		if (env_val == NULL)
		{
			perror("could not set environment variable");
			free(env_var);
			free(env_val);
			return (-1);
		}
		entry = get_symtab_entry(env_var);
		if (entry == NULL)
			entry = add_to_symtab(env_var);

		symtab_entry_setval(entry, env_val);
		free(env_var);
		free(env_val);
	}
	else
	{
		print("Incorrect number of arguements\n", STDERR_FILENO);
		return (1);
	}

	return (0);
}

/**
 * unset_env - Removes a variable from path
 * @cmd: Command
 *
 * Return: 0 on success, -1 from path
 */
int unset_env(UCommand *cmd)
{
	char *env_var = NULL;
	ST_entry *entry = NULL;
	int i;

	if (cmd->ac < 2)
	{
		print("Incorrect number of arguements\n", STDERR_FILENO);
		return (1);
	}

	for (i = 1; i != cmd->ac; i++)
	{
		env_var = strdup(cmd->av[i]);
		entry = do_lookup(env_var, symtab_stack.global_symtab);
		if (env_var == NULL)
		{
			perror("could not get environment variable");
			free(env_var);
			return (-1);
		}
		if (entry == NULL)
		{
			perror("could remove environment variable");
			free(env_var);
			return (-1);
		}
		rem_from_symtab(entry, symtab_stack.global_symtab);

		free(env_var);
	}
	return (0);
}

/**
 * get_symtab_path - Get the val from the symtab
 *
 * Return: NULL on error or the path variable
 */
char *get_symtab_path(void)
{
	ST_entry *symtab;
	char *path;

	symtab = get_symtab_entry("PATH");
	if (symtab != NULL)
	{
		path = strdup(symtab->val);
		return (path);
	}

	return (NULL);
}