141 lines
3.7 KiB
C
141 lines
3.7 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: 2019/01/29 16:12:21 by tmaze ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void put_error_cd(char *file, char *msg)
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{
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ft_putstr("cd: ");
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ft_putstr(file);
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ft_putstr(": ");
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ft_putendl(msg);
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}
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char *check_path_slash_cd(char *exec)
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{
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int i;
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struct stat info;
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if (exec[0] == '/')
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{
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if ((i = access(exec, F_OK)) != 0)
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put_error_cd(exec, "no such file or directory");
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if (i != 0)
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return (NULL);
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if ((i = stat(exec, &info)) != 0)
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put_error_cd(exec, "can't determine info");
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if (i != 0)
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return (NULL);
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if (!S_ISDIR(info.st_mode))
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{
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put_error_cd(exec, "not a directory");
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return (NULL);
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}
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if ((i = access(exec, X_OK)) != 0)
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put_error_cd(exec, "permission denied");
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if (i != 0)
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return (NULL);
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return (exec);
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}
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return (NULL);
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}
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int cmd_cd_core(char *path, t_list **env, char opt)
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{
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t_envelem *pwd;
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char *oldpwd;
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char *c_path;
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char *tmp;
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if (check_path_slash_cd(path) == NULL)
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{
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put_error_cd(path, "invalid path");
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return (1);
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}
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if (chdir(path) == -1
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|| (pwd = env_getelemfromkey("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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if ((oldpwd = ft_strdup(pwd->val)) == 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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if (env_addupdate("PWD", path, env) == NULL
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|| env_addupdate("OLDPWD", oldpwd, env) == NULL)
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{
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put_error_cd(path, "error");
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ft_strdel(&oldpwd);
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return (1);
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}
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ft_strdel(&oldpwd);
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return (0);
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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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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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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(char **argv, t_list **env)
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{
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t_envelem *elem;
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size_t i;
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char *path;
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char opt;
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int ret;
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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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if (!argv[i] && (elem = env_getelemfromkey("HOME", *env)) != NULL && elem->val != NULL)
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return (cmd_cd_core(elem->val, env, opt));
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else if (argv[i] && argv[1][0] == '/')
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return (cmd_cd_core(argv[1], env, opt));
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else if (argv[i] && argv[i][0] == '-' && (elem = env_getelemfromkey("OLDPWD", *env)) != NULL)
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return (cmd_cd_core(elem->val, env, opt));
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else if (argv[i] && argv[i][0] != '/' && (elem = env_getelemfromkey("PWD", *env)) != NULL && elem->val != NULL)
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{
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if ((path = ft_strnew(ft_strlen(elem->val) + ft_strlen(argv[i]) + 1)) == NULL)
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put_error_cd(argv[i], "memory error");
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if (path == NULL)
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return (1);
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ft_strcpy(path, elem->val);
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path[ft_strlen(path)] = '/';
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ft_strcat(path, argv[i]);
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ret = cmd_cd_core(path, env, opt);
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ft_strdel(&path);
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return (ret);
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}
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return (1);
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}
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