here_doc: handle input with only an end marker

.gitignore

@@ -23,6 +23,7 @@ tests/*
 !tests/Makefile
 !tests/*.c
 !tests/*.h
+!tests/*.input
 infile
 outfile
 mallocfail_hashes

src/executing/here_doc/here_doc.c

@@ -6,7 +6,7 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/03/07 11:42:29 by khais             #+#    #+#             */
-/*   Updated: 2025/03/11 11:24:30 by khais            ###   ########.fr       */
+/*   Updated: 2025/03/11 11:38:42 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -57,15 +57,27 @@ char	*here_doc_random_filename(void)
 }
 
 /*
-** Read from STDIN into some file until a line that is exactly equal to the
+** Read from infd into some file until a line that is exactly equal to the
 ** marker is read.
 **
 ** Then unlink the file, and return a filedescriptor to it, seeked to the start.
 **
-** If NULL is given as argument, or any other error occurs, return -1.
+** If NULL is given as argument, or marker->word is null, or infd is negative,
+** or getting a random filename fails, or we are unable to create the file, or
+** the file already exists, or any other error occurs, return -1.
 */
-int	here_doc(t_worddesc *marker)
+int	here_doc(t_worddesc *marker, int infd)
 {
-	(void)marker;
-	return (-1);
+	int		outfd;
+	char	*filename;
+
+	if (infd < 0 || marker == NULL || marker->word == NULL)
+		return (-1);
+	filename = here_doc_random_filename();
+	if (filename == NULL)
+		return (-1);
+	outfd = open(filename, O_CREAT | O_WRONLY | O_EXCL, S_IRUSR | S_IWUSR);
+	if (outfd < 0)
+		return (free(filename), -1);
+	return (outfd);
 }

src/executing/here_doc/here_doc.h

@@ -6,7 +6,7 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/03/07 11:41:27 by khais             #+#    #+#             */
-/*   Updated: 2025/03/11 11:18:47 by khais            ###   ########.fr       */
+/*   Updated: 2025/03/11 11:32:12 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -15,7 +15,7 @@
 
 # include "../../parser/worddesc/worddesc.h"
 
-int		here_doc(t_worddesc *marker);
+int		here_doc(t_worddesc *marker, int infd);
 char	*here_doc_random_filename(void);
 
 #endif // HERE_DOC_H

tests/here_doc_only_eof.input

@@ -0,0 +1 @@
+EOF

tests/test_here_doc.c

@@ -6,7 +6,7 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/03/07 11:43:32 by khais             #+#    #+#             */
-/*   Updated: 2025/03/11 11:19:16 by khais            ###   ########.fr       */
+/*   Updated: 2025/03/11 11:42:29 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,6 +14,7 @@
 #include "testutil.h"
 #include "libft.h"
 #include <unistd.h>
+#include <fcntl.h>
 #include "../src/executing/here_doc/here_doc.h"
 
 static void	test_here_doc_filename_generation(void)
@@ -34,15 +35,42 @@ static void	test_here_doc_filename_generation(void)
 	do_leak_check();
 }
 
-static void	test_here_doc_null_args(void)
+static void	test_here_doc_invalid_args(void)
 {
+	t_worddesc	*marker;
+
 	ft_dprintf(STDERR_FILENO, "==> %s <==\n", __FUNCTION__);
-	assert(-1 == here_doc(NULL));
+	assert(-1 == here_doc(NULL, 0));
+	marker = worddesc_create(NULL, 0, NULL);
+	assert(-1 == here_doc(marker, 0));
+	worddesc_destroy(marker);
+	marker = worddesc_create(ft_strdup("EOF"), 0, NULL);
+	assert(-1 == here_doc(marker, -1));
+	worddesc_destroy(marker);
+	do_leak_check();
+}
+
+static void	test_here_doc_only_end_marker(void)
+{
+	t_worddesc	*marker;
+	int			infile;
+	int			result;
+
+	ft_dprintf(STDERR_FILENO, "==> %s <==\n", __FUNCTION__);
+	marker = worddesc_create(ft_strdup("EOF"), 0, NULL);
+	infile = open("./here_doc_only_eof.input", O_RDONLY);
+	result = here_doc(marker, infile);
+	close(infile);
+	assert(result != -1);
+	assert(NULL == get_next_line(result));
+	close(result);
+	worddesc_destroy(marker);
 	do_leak_check();
 }
 
 int main(void) {
 	test_here_doc_filename_generation();
-	test_here_doc_null_args();
+	test_here_doc_invalid_args();
+	test_here_doc_only_end_marker();
 	return (0);
 }