104 lines
3 KiB
C
104 lines
3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* builtin_cd.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: ariard <ariard@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/03/25 18:20:42 by ariard #+# #+# */
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/* Updated: 2017/03/25 21:23:11 by ariard ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define CD_OPT_L (1 << 0)
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#define CD_OPT_P (1 << 1)
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#define HAS_CDOPT_P(x) (x & CD_OPT_P)
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#define HAS_CDOPT_L(x) (x & CD_OPT_L)
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#define CD_USAGE "usage: cd [-L|-P] [dir]"
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#define CDERR_0 "cd: too many arguments"
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#define CDERR_1 "cd %s not set"
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#define CDERR_2 "cd : %s: No such file or directory"
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#define CDERR_3 "cd : %s: Permission denied"
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#define CDERR_4 "cd : %s: Not a directory"
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#define CDERR_5 "cd : unable to proceed: %s"
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static t_cliopts g_cdopts[] =
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{
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{'P', NULL, CD_OPT_P, CD_OPT_L, NULL, 0},
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{'L', NULL, CD_OPT_L, CD_OPT_P, NULL, 0},
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{0, NULL, 0, 0, NULL, 0},
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};
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int cd_file_autorisations(char *target, int flag)
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{
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(void)flag;
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if (access(target, F_OK))
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return (SH_ERR(CDERR_2, target));
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if (!is_directory(target))
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return (SH_ERR(CDERR_3, target));
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if (access(target, X_OK))
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return (SH_ERR(CDERR_4, target));
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if (chdir(target))
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return (SH_ERR(CDERR_5, target));
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setwd("PWD");
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return (0);
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}
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static char *cd_operand_exist(char *arg)
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{
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char *tget;
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tget = NULL;
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if (!arg)
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{
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if (!(tget = ft_strdup(ft_getenv(data_singleton()->env, "HOME"))))
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return (SH_ERR(CDERR_1, "HOME") ? NULL : NULL);
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}
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else
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{
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if (!ft_strcmp(arg, "-"))
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{
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if (!(tget = ft_strdup(ft_getenv(data_singleton()->env, "OLDPWD"))))
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return (SH_ERR(CDERR_1, "OLDPWD") ? NULL : NULL);
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return (tget);
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}
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return (tget = ft_strdup(arg));
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}
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return (tget);
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}
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void setwd(char *var)
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{
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char *cwd;
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cwd = getcwd(NULL, 0);
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builtin_setenv(NULL, (char*[]){"cd", var, cwd, NULL}, NULL);
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ft_strdel(&cwd);
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}
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int builtin_cd(const char *path, char *const av[],
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char *const envp[])
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{
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char *oldpwd;
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char *target;
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t_data_template data;
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int ret;
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(void)envp;
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(void)path;
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data.flag = CD_OPT_L;
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if (cliopts_get((char **)av, g_cdopts, &data))
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return (1);
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if (data.av_data[0] && data.av_data[1])
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return (SH_ERR(CDERR_0) && SH_ERR(CD_USAGE));
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if (!(target = cd_operand_exist(*data.av_data)))
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return (1);
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oldpwd = getcwd(NULL, 0);
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if (!(ret = cd_file_autorisations(target, data.flag)))
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builtin_setenv(NULL, (char*[]){"cd", "OLDPWD", oldpwd, NULL}, NULL);
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ft_strdel(&target);
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ft_strdel(&oldpwd);
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return (ret);
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}
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