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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* cd.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/01 17:10:20 by charles #+# #+# */
/* Updated: 2020/10/09 08:41:17 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
/*
** \file cd.c
** \brief `cd` builtin
*/
#include "minishell.h"
/*
** \brief Change directory
** \param argv arguments
** \param env environment
** \return a status code or EVAL_FATAL on fatal error
*/
int builtin_cd(char **argv, t_env env)
{
char cwd[PATH_MAX + 1];
char *oldwd;
char *home;
(void)env;
oldwd = env_search(env, "PWD", NULL);
if (oldwd == NULL)
oldwd = "";
if (argv[1] != NULL && argv[1][0] == '\0')
{
if (env_export(env, "OLDPWD", oldwd) == NULL)
return (EVAL_FATAL);
return (0);
}
if (argv[1] == NULL)
{
if ((home = env_search(env, "HOME", NULL)) == NULL)
return (errorf_ret(1, "cd: HOME not set\n"));
argv[1] = home;
}
if (chdir(argv[1]) == -1)
return (errorf_ret(1, "cd: %s: %s\n", argv[1], strerror(errno)));
if (env_export(env, "OLDPWD", oldwd) == NULL)
return (EVAL_FATAL);
if (getcwd(cwd, PATH_MAX) == NULL)
return (1);
if (env_export(env, "PWD", cwd) == NULL)
return (EVAL_FATAL);
return (0);
}
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