141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* builtin_env.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gwojda <gwojda@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/03/22 16:20:31 by gwojda #+# #+# */
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/* Updated: 2017/03/25 01:19:51 by wescande ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define ENV_USAGE "env [-i] [name=value]... [utility [argument...]]"
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#define ENV_NOFILE "env: %s: No such file or directory"
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#define ENV_NOPERM "env: %s: Permission denied"
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# define BT_ENV_LI (1 << 0)
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# define BT_ENV_LU (1 << 1)
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static t_cliopts g_env_opts[] =
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{
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{'i', NULL, 0, 0, &bt_env_opt_i, 0},
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{'u', NULL, 0, 0, &bt_env_opt_u, 1},
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{0, 0, 0, 0, 0},
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};
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int bt_env_opt_i(char *opt_arg, t_env_data *data)
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{
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(void)opt_arg;
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ft_tabdel(&data->custom_env);
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return (0);
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}
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static void env_freeone(char **env, char *arg)
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{
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int i;
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char *tmp;
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while (env && *env && (i = -1))
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{
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if (ft_strcmp(*env, arg) == '='
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&& ft_strlen(arg) == ft_strlenchr(*env, '='))
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{
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tmp = *env;
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while (*env)
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{
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*env = *(env + 1);
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++env;
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}
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ft_strdel(&tmp);
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return ;
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}
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++env;
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}
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}
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int bt_env_opt_u(char *opt_arg, t_env_data *data)
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{
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int i;
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char *tmp;
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char **env;
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char **tmp_env;
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env = data->custom_env;
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while (env && *env && (i = -1))
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{
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if (ft_strcmp(*env, opt_arg) == '='
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&& ft_strlen(opt_arg) == ft_strlenchr(*env, '='))
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{
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tmp = *env;
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tmp_env = env + 1;
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while (*env)
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{
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*env = *(env + 1);
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++env;
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}
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env = tmp_env;
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ft_strdel(&tmp);
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}
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++env;
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}
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return (0);
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}
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static int bt_env_getcustom(char ***av, t_env_data *data)
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{
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if (!av || !*av || !data)
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return (1);
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while (**av && ft_strchr(**av, '='))
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{
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data->custom_env = ft_sstradd(data->custom_env, **av);
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++(*av);
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}
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return (0);
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}
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static int bt_env_parse(t_env_data *data, char **av)
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{
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data->flag = 0;
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data->av_data = NULL;
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data->custom_env = ft_sstrdup(data_singleton()->env);
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if (cliopts_get(av, g_env_opts, data))
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return (1);
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bt_env_getcustom(&data->av_data, data);
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if (!(data->flag & BT_ENV_LI))
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{
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data->custom_env = ft_sstrmerge(data_singleton()->env, data->custom_env);
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}
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return (0);
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}
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int builtin_env(const char *path,
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char *const argv[], char *const envp[])
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{
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t_env_data dat;
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int status;
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pid_t pid;
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(void)envp;
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if (bt_env_parse(&dat, (char**)argv))
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return (ft_perror("env") && SH_ERR("usage: %s", ENV_USAGE));
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if (!*dat.av_data)
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{
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ft_sstrprint(dat.custom_env, '\n');
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return (ft_putchar('\n') * 0);
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}
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else if ((pid = fork()) == 0)
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{
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if (!(path = ft_strchr(dat.av_data[0], '/') ? ft_strdup(dat.av_data[0])
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: ft_hash(dat.av_data[0])) || access(path, F_OK) != 0)
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exit(SH_ERR(ENV_NOFILE, dat.av_data[0]));
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if (is_directory(path) || access(path, X_OK) != 0)
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exit(SH_ERR(ENV_NOPERM, dat.av_data[0]));
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execve(path, dat.av_data, dat.custom_env);
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}
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waitpid(pid, &status, 0);
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ft_sstrfree(dat.custom_env);
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tcsetpgrp(STDIN, data_singleton()->jobc.shell_pgid);
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return (WIFEXITED(status) ? WEXITSTATUS(status) : 128 + WTERMSIG(status));
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}
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