116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ms_ext.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tmaze <tmaze@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/10/25 18:21:47 by tmaze #+# #+# */
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/* Updated: 2019/11/18 09:35:44 by tmaze ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void *return_null(char *msg)
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{
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ft_printf("%s\n", msg);
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return (NULL);
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}
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t_env *search_key(t_env *env, char *cmd, int index)
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{
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t_env *it;
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t_env *ret;
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int i;
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int j;
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it = env;
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ret = NULL;
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while (it && cmd[index + 1])
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{
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i = 0;
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j = index;
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while (it->key[i] && cmd[j] && it->key[i] == cmd[j])
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{
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i++;
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j++;
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}
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if (!it->key[i] && (!ret || ft_strlen(it->key) > ft_strlen(ret->key)))
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{
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ft_printf("found key: %s\n", it->key);
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ret = it;
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}
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it = it->next;
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}
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return (ret);
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}
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char *replace_env(char *src, t_env *elem, int key_size, int i)
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{
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char *ret;
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int res_len;
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res_len = ft_strlen(src) - key_size + ft_strlen(elem->val);
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if ((ret = ft_strnew(res_len)) != NULL)
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{
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ft_strncpy(ret, src, i);
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ft_strcat(ret, elem->val);
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ft_strcat(ret, src + 1 + key_size);
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}
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else
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ft_printf("minishell: memory error\n");
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return (ret);
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}
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char *resolve_complete_key(char *src, int *index, t_env *env)
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{
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t_env *tmp;
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char *ret;
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if ((tmp = search_key(env, src, *index + 1)) != NULL)
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{
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if ((ret = replace_env(src, tmp, ft_strlen(tmp->key)
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+ 1, *index)) != NULL)
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{
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ft_strdel(&src);
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src = ret;
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*index += ft_strlen(tmp->val);
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return (src);
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}
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else
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return return_null("minishell: memory error");
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}
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else
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return return_null("minishell: variable not found");
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}
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char **res_ext(char **av, t_env *env)
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{
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int i[3];
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t_env *tmp;
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char *ret;
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i[0] = 0;
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while (av && av[i[0]])
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{
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i[2] = 0;
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while (av[i[0]] && av[i[0]][i[2]])
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{
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if (av[i[0]][i[2]] == '~' && (tmp = ft_envgetelem("HOME", env))
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!= NULL && (ret = replace_env(av[i[0]], tmp, 1, i[2])) != NULL)
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{
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ft_strdel(&av[i[0]]);
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av[i[0]] = ret;
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i[2] += ft_strlen(tmp->val);
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}
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else if (av[i[0]][i[2]] == '$'
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&& resolve_complete_key(av[i[0]], &i[2], env) == NULL)
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return (NULL);
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i[2]++;
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}
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i[0]++;
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}
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return (av);
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}
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