Initial source files for dos2unix and unix2dos, not sure of the origin of the files, but I did list the page I got them from. I had to make several changes to get them to build.

app-text/dos2unix/DOS2UNIX.C

@@ -0,0 +1,107 @@
+/*
+ *                              DOS2UNIX.C
+ *
+ * Clean out cr/lf combinations in a file but keep it's original
+ * date/time stamp.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifndef TRUE
+#	define TRUE  (1)
+#	define FALSE (0)
+#endif
+
+#define R_CNTRL   "r"
+#define W_CNTRL   "w"
+
+struct stat s_buf;
+
+
+int dos2u (char *path);
+
+
+main (int argc, char **argv)
+{
+	char *path;
+	while (--argc>0)
+	{
+		if (stat (path=*++argv, &s_buf) != -1)
+		{
+			printf ("Dos2Unix: Cleaning file %s ...\n", path);
+			if (dos2u (path))
+			{
+				fprintf (stderr, "Dos2Unix: Problems cleaning file %s\n", path);
+			}
+		}
+		else
+		{
+			fprintf (stderr, "Dos2Unix: Can't stat '%s'\n", path);
+		}
+	}
+}
+
+
+
+
+	
+		
+	
+int dos2u (char *path)
+{
+	FILE *in, *out;
+	int ch,
+	    rval = FALSE;
+	char temppath [16];
+/*	struct utimbuf { time_t actime, modtime; } ut_buf; */
+	struct utimbuf ut_buf;
+
+	strcpy (temppath, "./clntmp");
+	if ((in=fopen (path, R_CNTRL)) == (FILE *) 0)
+		return TRUE;
+	if ((out=fopen (temppath, W_CNTRL)) == (FILE *) 0)
+	{
+		fclose (in);
+		return TRUE;
+	}
+	while ((ch = getc (in)) != EOF)
+		if ((ch != '\015' && ch != '\032') &&
+			(putc (ch, out) == EOF)           )
+		{
+			rval = TRUE;
+			break;
+		}
+	if (fclose (in) == EOF)
+	{
+		rval = TRUE;
+	}
+	if (fclose (out) == EOF)
+	{
+		rval = TRUE;
+	}
+	ut_buf.actime = s_buf.st_atime;
+	ut_buf.modtime = s_buf.st_mtime;
+	if (utime (temppath, &ut_buf) == -1)
+		rval = TRUE;
+	if (unlink (path) == -1)
+		rval = TRUE;
+	if (rval)
+	{
+		unlink (temppath);
+		return TRUE;
+	}
+	if (link (temppath,path) == -1)
+	{
+		fprintf (stderr, "Dos2Unix: Problems renaming '%s' to '%s'\n", temppath, path);
+		fprintf (stderr, "          However, file '%s' remains\n", temppath);
+		exit (1);
+	}
+	unlink (temppath);
+	return FALSE;
+}
+

app-text/dos2unix/UNIX2DOS.C

@@ -0,0 +1,107 @@
+/*
+ *                              UNIX2DOS.C
+ *
+ * Convert lf's to crlf combinations in a file but keep it's original
+ * date/time stamp.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifndef TRUE
+#	define TRUE  (1)
+#	define FALSE (0)
+#endif
+
+#define R_CNTRL   "r"
+#define W_CNTRL   "w"
+
+
+
+struct stat s_buf;
+
+int u2dos (char *path);
+
+
+main (int argc, char **argv)
+{
+	char *path;
+	while (--argc>0)
+	{
+		if (stat (path=*++argv, &s_buf) != -1)
+		{
+			printf ("Unix2Dos: Cleaning file %s ...\n", path);
+			if (u2dos (path))
+			{
+				fprintf (stderr, "Unix2Dos: Problems cleaning file %s\n", path);
+			}
+		}
+		else
+		{
+			fprintf (stderr, "Unix2Dos: Can't stat '%s'\n", path);
+		}
+	}
+}
+
+
+
+
+int u2dos (char *path)
+{
+	FILE *in, *out;
+	int ch,
+	    rval = FALSE;
+	char temppath [16];
+/*	struct utimbuf { time_t actime, modtime; } ut_buf; */
+	struct utimbuf ut_buf;
+
+	strcpy (temppath, "./clntmp");
+	if ((in=fopen (path, R_CNTRL)) == (FILE *) 0)
+		return TRUE;
+	if ((out=fopen (temppath, W_CNTRL)) == (FILE *) 0)
+	{
+		fclose (in);
+		return TRUE;
+	}
+	while ((ch = getc (in)) != EOF)
+		if (((ch == '\012') && (putc ('\015', out) == EOF)) ||
+		    (putc (ch, out) == EOF)                   )
+		{
+			rval = TRUE;
+			break;
+		}
+	if (fclose (in) == EOF)
+	{
+		rval = TRUE;
+	}
+	if (fclose (out) == EOF)
+	{
+		rval = TRUE;
+	}
+	ut_buf.actime = s_buf.st_atime;
+	ut_buf.modtime = s_buf.st_mtime;
+	if (utime (temppath, &ut_buf) == -1)
+		rval = TRUE;
+	if (unlink (path) == -1)
+		rval = TRUE;
+	if (rval)
+	{
+		unlink (temppath);
+		return TRUE;
+	}
+	if (link (temppath,path) == -1)
+	{
+		fprintf (stderr, "Unix2Dos: Problems renaming '%s' to '%s'\n", temppath, path);
+		fprintf (stderr, "          However, file '%s' remains\n", temppath);
+		exit (1);
+	}
+	unlink (temppath);
+	return FALSE;
+}
+	
+		
+	

app-text/dos2unix/dos2unix-1.0.bep

@@ -0,0 +1,17 @@
+DESCRIPTION="dos2unix and unix2dos end of line file converters." 
+HOMEPAGE="http://www.programmersheaven.com/download/3118/download.aspx" 
+SRC_URI="http://www.haiku-ports.de/packages/app-text/dos2unix/source/dos2unix-1.0.zip"
+REVISION="1"
+STATUS_HAIKU="untested"
+DEPEND=""
+BUILD {
+	cd dos2unix-1.0
+	gcc -O -o dos2unix DOS2UNIX.C
+	gcc -O -o unix2dos UNIX2DOS.C
+}
+
+INSTALL {
+	cd dos2unix-1.0
+	cp dos2unix `finddir B_COMMON_BIN_DIRECTORY`/dos2unix
+	cp unix2dos `finddir B_COMMON_BIN_DIRECTORY`/unix2dos
+}