93 lines
2.6 KiB
C
93 lines
2.6 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: 2019/01/21 17:06:19 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 (ft_isin(exec, '/') != -1 && ft_isin(exec, '.') == -1)
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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)
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{
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t_envelem *pwd;
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char *oldpwd;
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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 = 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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int cmd_cd(char **argv, t_list **env)
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{
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t_envelem *elem;
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if (!argv[1] && (elem = env_getelemfromkey("HOME", *env))->val != NULL)
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return (cmd_cd_core(elem->val, env));
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else if (argv[1] && argv[1][0] == '/')
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return (cmd_cd_core(argv[1], env));
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else if (argv[1] && argv[1][0] == '-' && (elem = env_getelemfromkey("OLDPWD", *env)) != NULL)
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return (cmd_cd_core(elem->val, env));
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return (0);
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}
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