From 0fac25fd8154ae5eb20780449ae48019be262994 Mon Sep 17 00:00:00 2001
From: mcolonna <mcolonna@student.42perpignan.fr>
Date: Tue, 7 May 2024 14:00:26 +0200
Subject: [PATCH] [ADD] redirection '<<'

---
 src/parse_command.c | 54 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 4 deletions(-)

diff --git a/src/parse_command.c b/src/parse_command.c
index 271a47e..2d6dd3b 100644
--- a/src/parse_command.c
+++ b/src/parse_command.c
@@ -6,12 +6,44 @@
 /*   By: mcolonna <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/24 13:47:40 by mcolonna          #+#    #+#             */
-/*   Updated: 2024/05/02 15:15:36 by mcolonna         ###   ########.fr       */
+/*   Updated: 2024/05/07 13:59:30 by mcolonna         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "include.h"
 
+// Ask the user for data and set readfd to the fd which will receive this
+// data.
+// Returns 'errno' on error.
+static int	heredoc(t_memclass mc, int *readfd, const char *eof)
+{
+	const t_memclass		mc_in = mem_subclass(fatal_error, mc);
+	int						outpipe[2];
+	t_const_string			line;
+	const t_const_string	eof_line = str_join(fatal_error, mc_in, eof, "\n");
+
+	if (pipe(outpipe) == -1)
+		minishell_error("errno");
+	*readfd = outpipe[0];
+	while (true)
+	{
+		print_str(fatal_error, 1, "\e[38;5;33m( 'o')> \e[0m");
+		line = NULL;
+		while (!line)
+			line = read_line(fatal_error, mc_in, 0);
+		if (str_eq(line, eof) || str_eq(line, eof_line))
+			break ;
+		print_str(err_remember, outpipe[1], line);
+		mem_free((void *)line);
+		if (err_get())
+			return (minishell_error("errno"), errno);
+	}
+	mem_freeall(mc_in);
+	if (close(outpipe[1]) == -1)
+		return (minishell_error("errno"), errno);
+	return (0);
+}
+
 // To call when a parse error occurs.
 // Always returns 1 (parse error's status).
 static int	parse_error(const char *msg)
@@ -31,6 +63,7 @@ typedef struct s_parsing_args
 	t_stream	stream;
 	t_list		calls;
 	bool		got_first_call; // got at least the first program call?
+	const char	*heredoc;
 }			t_parsing_args;
 
 // Skip blank characters
@@ -116,17 +149,27 @@ static int	get_call(t_parsing_args *args, const char *stop_charset)
 static int	get_inputfile(t_parsing_args *args, const char *stop_charset)
 {
 	const char	*str;
+	bool		heredoc;
 
 	if (args->r.input_fd != 0)
 		return (parse_error("several input files"));
 	if (!stream_read(&args->stream))
 		return (parse_error("EOF unexpected"));
+	heredoc = stream_read(&args->stream) == '<';
+	if (heredoc)
+		stream_pop(&args->stream);
+	skip_blank(&args->stream);
 	str = get_string(args, stop_charset);
 	if (!str)
 		return (parse_error("EOF unexpected"));
-	args->r.input_fd = open(str, O_RDONLY);
-	if (args->r.input_fd == -1)
-		return (perror(str), errno);
+	if (heredoc)
+		args->heredoc = str;
+	else
+	{
+		args->r.input_fd = open(str, O_RDONLY);
+		if (args->r.input_fd == -1)
+			return (perror(str), errno);
+	}
 	return (0);
 }
 
@@ -208,6 +251,7 @@ t_parsing_args	init_parsing_args(const t_memclass mc)
 	},
 		.calls = list_createempty(mc),
 		.got_first_call = false,
+		.heredoc = NULL,
 	};
 
 	return (r);
@@ -237,5 +281,7 @@ t_command	parse_command(const t_memclass mc, const char *command)
 				fatal_error, args.mc, &args.calls, sizeof(t_call));
 	if (error)
 		args.r.error = error;
+	if (args.heredoc)
+		heredoc(mc, &args.r.input_fd, args.heredoc);
 	return (args.r);
 }