custom_setenv.c

#include "shell.h"

/**
 * _setenv - Initialize a new environment variable,
 *             or modify an existing one
 * @info: Structure containing potential arguments. Used to maintain
 *        constant function prototype.
 * @var: the string env var property
 * @value: the string env var value
 *  Return: Always 0
 */
int _setenv(info_t *info, char *var, char *value)
{
	char *buf = NULL;
	list_t *node;
	char *p;

	if (!var || !value)
		return (1);

	_strcpy(buf, var);
	_strcat(buf, "=");
	_strcat(buf, value);

	node = info->env;

	while (node)
	{
		p = _strstr(node->str, var);
		if (p && *p == '=')
		{
			free(node->str);
			node->str = buf;
			info->env_changed = 1;
			return (0);
		}
		node = node->next;
	}
	add_node_end(&(info->env), buf, 0);
	free(buf);
	info->env_changed = 1;
	return (0);
}