diff --git a/src/tee/tee.c b/src/tee/tee.c
new file mode 100644
index 0000000..6c85766
--- /dev/null
+++ b/src/tee/tee.c
@@ -0,0 +1,153 @@
+/*  vim:set ts=4 sw=4:
+ *
+ *	Copyright (c) 1996, Paul Slootman
+ *
+ *	Author: Paul Slootman
+ *			(paul@wurtel.hobby.nl, paul@murphy.nl, paulS@toecompst.nl)
+ *
+ *	This source code is released into the public domain. It is provided on an
+ *	as-is basis and no responsibility is accepted for its failure to perform
+ *	as expected. It is worth at least as much as you paid for it!
+ *
+ * tee.c - pipe fitting
+ *
+ * tee reads stdin, and writes what it reads to each of the specified
+ * files. The primary reason of existence for this version is a quick
+ * and dirty implementation to distribute with Vim, to make one of the
+ * most useful features of Vim possible on OS/2: quickfix.
+ *
+ * Of course, not using tee but instead redirecting make's output directly
+ * into a temp file and then processing that is possible, but if we have a
+ * system capable of correctly piping (unlike DOS, for example), why not
+ * use it as well as possible? This tee should also work on other systems,
+ * but it's not been tested there, only on OS/2.
+ *
+ * tee is also available in the GNU shellutils package, which is available
+ * precompiled for OS/2. That one probably works better.
+ */
+
+#include <unistd.h>
+#include <malloc.h>
+#include <stdio.h>
+
+void usage(void)
+{
+	fprintf(stderr,
+"tee usage:\n\
+\ttee [-a] file ... file_n\n\
+\n\
+\t-a\tappend to files instead of truncating\n\
+\nTee reads its input, and writes to each of the specified files,\n\
+as well as to the standard output.\n\
+\n\
+This version supplied with Vim 4.2 to make ':make' possible.\n\
+For a more complete and stable version, consider getting\n\
+[a port of] the GNU shellutils package.\n\
+");
+}
+
+/*
+ * fread only returns when count is read or at EOF.
+ * We could use fgets, but I want to be able to handle binary blubber.
+ */
+
+int
+myfread(char *buf, int elsize /*ignored*/, int max, FILE *fp)
+{
+	int	c;
+	int	n = 0;
+
+	while ((n < max) && ((c = getchar()) != EOF))
+	{
+		*(buf++) = c;
+		n++;
+		if (c == '\n' || c == '\r')
+			break;
+	}
+	return n;
+}
+
+
+void
+main(int argc, char *argv[])
+{
+	int	append = 0;
+	int	numfiles;
+	int	opt;
+	int	maxfiles;
+	FILE	**filepointers;
+	int	i;
+	char	buf[BUFSIZ];
+	int	n;
+	extern int	optind;
+
+	while ((opt = getopt(argc, argv, "a")) != EOF)
+	{
+		switch (opt)
+		{
+			case 'a':	append++;
+					break;
+			default:	usage();
+					exit(2);
+		}
+	}
+
+	numfiles = argc - optind;
+
+	if (numfiles == 0)
+	{
+		fprintf(stderr, "doesn't make much sense using tee without any file name arguments...\n");
+		usage();
+		exit(2);
+	}
+
+	maxfiles = sysconf(_SC_OPEN_MAX);	/* or fill in 10 or so */
+	if (maxfiles < 0)
+		maxfiles = 10;
+	if (numfiles + 3 > maxfiles)	/* +3 accounts for stdin, out, err */
+	{
+		fprintf(stderr, "Sorry, there is a limit of max %d files.\n", maxfiles - 3);
+		exit(1);
+	}
+	filepointers = calloc(numfiles, sizeof(FILE *));
+	if (filepointers == NULL)
+	{
+		fprintf(stderr, "Error allocating memory for %d files\n", numfiles);
+		exit(1);
+	}
+	for (i = 0; i < numfiles; i++)
+	{
+		filepointers[i] = fopen(argv[i+optind], append ? "ab" : "wb");
+		if (filepointers[i] == NULL)
+		{
+			fprintf(stderr, "Can't open \"%s\"\n", argv[i+optind]);
+			exit(1);
+		}
+	}
+	_fsetmode(stdin,  "b");
+	fflush(stdout);	/* needed for _fsetmode(stdout) */
+	_fsetmode(stdout, "b");
+
+	while ((n = myfread(buf, sizeof(char), sizeof(buf), stdin)) > 0)
+	{
+		fwrite(buf, sizeof(char), n, stdout);
+		fflush(stdout);
+		for (i = 0; i < numfiles; i++)
+		{
+			if (filepointers[i] &&
+			     fwrite(buf, sizeof(char), n, filepointers[i]) != n)
+			{
+				fprintf(stderr, "Error writing to file \"%s\"\n", argv[i+optind]);
+				fclose(filepointers[i]);
+				filepointers[i] = NULL;
+			}
+		}
+	}
+	for (i = 0; i < numfiles; i++)
+	{
+		if (filepointers[i])
+			fclose(filepointers[i]);
+	}
+
+	exit(0);
+}