84 lines
2.2 KiB
C
84 lines
2.2 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 <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/12/03 11:57:53 by jhalford #+# #+# */
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/* Updated: 2017/01/11 14:29:14 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "builtin.h"
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#define CDOPT_L (1 << 0)
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#define CDOPT_P (1 << 2)
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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\n"
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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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return (NULL);
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}
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else if (ft_strcmp(*av, "-") == 0)
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target = 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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int tmp_opts;
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i = 1;
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tmp_opts = 0;
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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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tmp_opts |= CDOPT_P;
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else if (av[i][j] == 'L')
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tmp_opts |= CDOPT_L;
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else
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return (i);
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}
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*opts |= tmp_opts;
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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, 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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opts = 0;
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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 (0);
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builtin_setenv(path, (char*[3]){"OLDPWD", getcwd(NULL, 0)}, envp);
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if (chdir(target))
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{
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ft_printf(CDERR_1, target);
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return (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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builtin_setenv(path, (char*[3]){"PWD", getcwd(NULL, 0)}, envp);
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return (0);
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}
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