101 lines
2.6 KiB
C
101 lines
2.6 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: 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: 2017/03/21 15:28:51 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define CDOPT_L (1 << 0)
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#define CDOPT_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 CDERR_1 "cd: no such file or directory: %s"
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#define CDERR_2 "cd: HOME not set"
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#define CDERR_3 "cd: too many arguments{eoc}"
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static char *builtin_cd_special(char *const av[], char *const env[])
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{
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char *target;
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if (!*av)
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{
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if (!(target = ft_getenv((char**)env, "HOME")))
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{
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SH_ERR(CDERR_2);
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return (NULL);
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}
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}
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else if (*av && *(av + 1))
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{
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SH_ERR(CDERR_3);
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return (NULL);
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}
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else if (ft_strcmp(*av, "-") == 0)
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target = ft_strdup(ft_getenv((char**)env, "OLDPWD"));
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else
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target = *av;
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return (target);
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}
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static int builtin_cd_opts(char *const av[], int *opts)
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{
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int i;
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int j;
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i = 1;
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if (av)
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while (av[i] && av[i][0] == '-' && av[i][1])
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{
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j = 0;
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while (av[i][++j])
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{
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if (av[i][j] == 'P')
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*opts = CDOPT_P;
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else if (av[i][j] == 'L')
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*opts = CDOPT_L;
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else if (av[i][j] == '-')
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return (i + 1);
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else
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return (i);
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}
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++i;
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}
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return (i);
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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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int i;
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int opts;
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char *target;
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char *cwd;
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opts = CDOPT_L;
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i = builtin_cd_opts(av, &opts);
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if (!(target = builtin_cd_special(av + i, envp)))
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return (builtin_return_status(0, 1));
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cwd = getcwd(NULL, 0);
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builtin_setenv(path, (char*[4]){"setenv", "OLDPWD", cwd, NULL}, envp);
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free(cwd);
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if (chdir(target))
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{
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SH_ERR(CDERR_1, target);
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return (builtin_return_status(0, 1));
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}
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else if (target != av[i])
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ft_printf("%s\n", target);
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cwd = getcwd(NULL, 0);
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builtin_setenv(path, (char*[4]){"setenv", "PWD", cwd, NULL}, envp);
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free(cwd);
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if (!ft_strcmp(*(av + i), "-"))
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free(target);
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return (builtin_return_status(0, 0));
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}
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