119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* cmd_cd.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tmaze <tmaze@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/01/07 16:44:40 by tmaze #+# #+# */
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/* Updated: 2020/02/01 15:32:59 by tmaze ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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int cmd_cd_update_env(char *path, t_env **env, char opt)
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{
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t_env *pwd;
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char *oldpwd;
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char *c_path;
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char p_path[4096];
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ft_bzero(p_path, 4096);
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if (!(pwd = ft_envgetelem("PWD", *env)))
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return (put_error_cd2(path, "env var PWD undefined"));
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if (getcwd(p_path, 4096) == NULL || (oldpwd = ft_strdup(pwd->val)) == NULL
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|| ft_realpath(path, &c_path) == NULL)
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return (put_error_cd2(path, "error"));
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if (cd_updateenv("PWD", ((opt == 'P') ? p_path : c_path), env) == NULL
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|| cd_updateenv("OLDPWD", oldpwd, env) == NULL)
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{
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ft_strdel(&oldpwd);
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ft_strdel(&c_path);
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return (put_error_cd2(path, "error"));
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}
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ft_strdel(&oldpwd);
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ft_strdel(&c_path);
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return (0);
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}
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int cmd_cd_core(char *path, t_env **env, char opt)
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{
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t_env *pwd;
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if (check_path_slash_cd(path) == NULL)
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return (1);
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if (chdir(path) == -1
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|| (pwd = ft_envgetelem("PWD", *env)) == NULL)
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{
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put_error_cd(path, "error");
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return (1);
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}
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return (cmd_cd_update_env(path, env, opt));
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}
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char cd_getparams(char **argv, size_t *i)
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{
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char ret[2];
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size_t j;
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ret[1] = '\0';
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ret[0] = 'L';
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*i = 0;
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while (argv[++(*i)] && argv[*i][0] == '-' && ft_strlen(argv[*i]) > 1)
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{
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j = 1;
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while (argv[*i][j] && (argv[*i][j] == 'L' || argv[*i][j] == 'P'))
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ret[0] = argv[*i][j++];
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if (argv[*i][j] && argv[*i][j] != 'L' && argv[*i][j] != 'P')
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{
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ret[0] = argv[*i][j];
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put_error_cd(ret, "invalid option");
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put_error_cd("usage", "cd [-L|-P] [dir]");
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ret[0] = '\0';
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break ;
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}
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}
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return (ret[0]);
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}
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int cmd_cd_switchboard(char **av, t_env **env, char opt, int i)
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{
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t_env *e;
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char *p;
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int ret;
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if ((!av[i] && (e = ft_envgetelem("HOME", *env)) != NULL && e->val
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!= NULL) || (av[i] && av[i][0] == '-'
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&& (e = ft_envgetelem("OLDPWD", *env)) != NULL))
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return (cmd_cd_core(e->val, env, opt));
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else if (av[i] && av[i][0] == '/')
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return (cmd_cd_core(av[i], env, opt));
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else if (av[i] && av[i][0] != '/'
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&& (e = ft_envgetelem("PWD", *env)) != NULL && e->val != NULL)
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{
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if ((p = ft_strnew(ft_strlen(e->val) + ft_strlen(av[i]) + 1)) == NULL)
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put_error_cd(av[i], "memory error");
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if (p == NULL)
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return (1);
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ft_strcpy(p, e->val);
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p[ft_strlen(p)] = '/';
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ft_strcat(p, av[i]);
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ret = cmd_cd_core(p, env, opt);
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ft_strdel(&p);
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return (ret);
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}
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return (1);
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}
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int cmd_cd(char **argv, t_env **env)
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{
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size_t i;
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char opt;
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i = 0;
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if ((opt = cd_getparams(argv, &i)) == '\0')
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return (1);
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return (cmd_cd_switchboard(argv, env, opt, i));
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}
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