80 lines
2.3 KiB
Text
80 lines
2.3 KiB
Text
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* builtin_cd.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jhalford@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/12/03 11:57:53 by jhalford #+# #+# */
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/* Updated: 2017/03/25 04:09:23 by ariard ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define BT_CD_L (1 << 0)
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#define BT_CD_P (1 << 1)
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#define CD_USAGE "usage: cd [-L|-P] [dir]"
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#define CDERR_1 "cd: no such file or directory: %s"
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#define CDERR_2 "cd: %s not set"
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#define CDERR_3 "cd: too many arguments"
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static t_cliopts g_cdopts[] =
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{
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{'P', NULL, BT_CD_P, BT_CD_L, NULL, 0},
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{'L', NULL, BT_CD_L, BT_CD_P, NULL, 0},
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{0, NULL, 0, 0, NULL, 0},
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};
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static char *bt_cd_target(char *arg)
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{
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char *target;
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if (!arg)
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{
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if (!(target = ft_getenv(data_singleton()->env, "HOME")))
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SH_ERR(CDERR_2, "HOME");
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}
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else if (ft_strcmp(arg, "-") == 0)
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{
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DG("doing -");
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if (!(target = ft_getenv(data_singleton()->env, "OLDPWD")))
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SH_ERR(CDERR_2, "OLDPWD");
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}
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else
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target = arg;
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return (target);
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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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free(cwd);
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}
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int builtin_cd(const char *path,
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char *const av[], char *const envp[])
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{
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char *target;
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t_data_template data;
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(void)path;
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(void)envp;
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data.flag = BT_CD_L;
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if (cliopts_get((char**)av, g_cdopts, &data))
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return (ft_perror("cd") && SH_ERR(CD_USAGE));
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if (data.av_data[0] && data.av_data[1])
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return (SH_ERR(CDERR_3) && SH_ERR(CD_USAGE));
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if (!(target = bt_cd_target(*data.av_data)))
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return (1);
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setwd("OLDPWD");
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if (chdir(target))
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return (SH_ERR(CDERR_1, target));
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else if (target != *data.av_data)
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ft_printf("%s\n", target);
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setwd("PWD");
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return (0);
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}
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