117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* builtin_read.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jhalford@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/01/20 15:01:45 by jhalford #+# #+# */
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/* Updated: 2017/03/24 16:23:51 by gwojda ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define US_READ "read [-ers] [-u fd] [-t timeout] [-p prompt]"
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#define US_READ_1 " [-n nchars] [-d delim] [name ...]"
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t_cliopts g_read_opts[] =
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{
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{'d', NULL, BT_READ_LD, 0, bt_read_getdelim},
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{'n', NULL, BT_READ_LN, 0, bt_read_getnchars},
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{'p', NULL, BT_READ_LP, 0, bt_read_getprompt},
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{'r', NULL, BT_READ_LR, 0, NULL},
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{'s', NULL, BT_READ_LS, 0, NULL},
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{'t', NULL, BT_READ_LT, 0, bt_read_gettimeout},
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{'u', NULL, BT_READ_LU, 0, bt_read_getfd},
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{0, 0, 0, 0, 0},
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};
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int bt_read_init(t_read *data, char **av)
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{
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data->opts = 0;
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data->delim = '\n';
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data->nchars = -1;
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data->prompt = NULL;
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data->fd = 0;
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data->timeout = 0;
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data->input = NULL;
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if (isatty(STDIN))
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data->opts |= BT_READ_INTER;
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if (bt_read_terminit(data) < 0)
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exit(1);
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if ((cliopts_get(av, g_read_opts, data)))
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return (ft_perror("read"));
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return (0);
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}
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int bt_read_loop(t_read *data)
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{
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int i;
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int esc;
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int ret;
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char buf[2];
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esc = 0;
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i = 0;
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if (data->prompt && (data->opts & BT_READ_INTER))
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ft_printf(data->prompt);
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while (42)
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{
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if ((ret = read(data->fd, buf, 1)) <= 0)
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return (ret);
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buf[ret] = 0;
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if (!esc && *buf == data->delim)
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break ;
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esc = esc ? 0 : !(data->opts & BT_READ_LR) && (*buf == '\\');
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ft_strappend(&data->input, buf);
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if (*buf == '\n' && !(data->opts &
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(BT_READ_LR | BT_READ_LS | BT_READ_INTER)))
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ft_putstr("> ");
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if ((data->opts & BT_READ_LN) && ++i >= data->nchars)
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break ;
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}
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return (0);
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}
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int bt_read_assign(t_read *data)
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{
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char *input;
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char **names;
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char *ifs;
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char *tok;
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input = data->input;
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names = *data->names ? data->names : (char*[]){"REPLY", NULL};
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ifs = ft_getenv(data_singleton()->local_var, "IFS");
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if (!names[1])
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ifs = NULL;
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tok = ft_strtok(input, ifs);
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while (*names)
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{
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if (!(builtin_setenv("setenv", (char*[]){"read", *names, tok}, NULL)))
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return (1);
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ifs = names[1] ? ifs : NULL;
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tok = ft_strtok(NULL, ifs);
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names++;
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}
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return (0);
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}
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int builtin_read(const char *path, char *const av[], char *const envp[])
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{
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t_read data;
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int ret;
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(void)path;
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(void)envp;
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ret = 0;
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if ((ret = bt_read_init(&data, (char **)av)) != 0)
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SH_ERR("usage: %s%s", US_READ, US_READ_1);
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else if ((ret = bt_read_loop(&data)))
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;
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else if (data.input && (ret = bt_read_assign(&data)))
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;
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bt_read_exit(&data);
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return (ret);
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}
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