diff --git a/bin2fex.c b/bin2fex.c
index 8777d38..20e1693 100644
--- a/bin2fex.c
+++ b/bin2fex.c
@@ -14,17 +14,11 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-#include "common.h"
-#include "bin2fex.h"
-
-#include <errno.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
-#include <sys/stat.h>
 #include <sys/mman.h>
-#include <fcntl.h>
 
 #define pr_info(F, ...)	do { \
 	fprintf(stderr, "bin2fex: " F, __VA_ARGS__); \
@@ -214,59 +208,3 @@ static int decompile(void *bin, size_t bin_size, FILE *out)
 	}
 	return 0; /* success */
 }
-
-/**
- */
-int main(int argc, char *argv[])
-{
-	struct stat sb;
-	int ret = -1;
-	int in = 0;
-	FILE *out = stdout;
-	const char *filename[] = {"stdin", "stdout"};
-	void *p;
-
-	/* open */
-	if (argc>1) {
-		filename[0] = argv[1];
-
-		if ((in = open(filename[0], O_RDONLY)) < 0) {
-			errf("%s: %s\n", filename[0], strerror(errno));
-			goto usage;
-		}
-		if (argc > 2) {
-			filename[1] = argv[2];
-
-			if ((out = fopen(filename[1], "w")) == NULL) {
-				errf("%s: %s\n", filename[1], strerror(errno));
-				goto usage;
-			}
-		}
-	}
-
-	/* mmap input */
-	if (fstat(in, &sb) == -1)
-		errf("fstat: %s: %s\n", filename[0], strerror(errno));
-	else if (!S_ISREG(sb.st_mode))
-		errf("%s: not a regular file (mode:%d).\n", filename[0], sb.st_mode);
-	else if ((p = mmap(0, sb.st_size, PROT_READ, MAP_SHARED, in, 0)) == MAP_FAILED)
-		errf("mmap: %s: %s\n", filename[0], strerror(errno));
-	else {
-		/* close and decompile mmap */
-		close(in);
-
-		ret = decompile(p, sb.st_size, out);
-		if (munmap(p, sb.st_size) == -1)
-			errf("munmap: %s: %s\n", filename[0], strerror(errno));
-
-		goto done;
-	}
-
-usage:
-	errf("Usage: %s [<script.bin> [<script.fex>]]\n", argv[0]);
-
-	if (in > 2) close(in);
-done:
-	if (out && out != stdout) fclose(out);
-	return ret;
-}
diff --git a/fexc.c b/fexc.c
index d70c12d..0036625 100644
--- a/fexc.c
+++ b/fexc.c
@@ -21,6 +21,8 @@
 #include <libgen.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 
@@ -42,15 +44,50 @@ static inline int script_parse(enum script_format format,
 	switch (format) {
 	case FEX_SCRIPT_FORMAT: {
 		FILE *in = stdin;
-		if (filename && (in = fopen(filename, "r")) == NULL) {
-			errf("%s: %s\n", filename, strerror(errno));
+		if (!filename)
+			filename = "<stdin>";
+		else if ((in = fopen(filename, "r")) == NULL) {
+			pr_err("%s: %s\n", filename, strerror(errno));
 			break;
 		}
-		ret = script_parse_fex(in, filename ? filename : "<stdin>",
-				       script);
+		ret = script_parse_fex(in, filename, script);
 		fclose(in);
 		}; break;
 	case BIN_SCRIPT_FORMAT: {
+		int in = 0; /* stdin */
+		struct stat sb;
+		void *bin = NULL;
+
+		if (!filename)
+			filename = "<stdin>";
+		else if ((in = open(filename, O_RDONLY)) < 0) {
+			pr_err("%s: %s\n", filename, strerror(errno));
+			break;
+		} else if (fstat(in, &sb) == -1) {
+			pr_err("%s: %s: %s\n", filename,
+			       "fstat", strerror(errno));
+			goto bin_close;
+		} else if (S_ISREG(sb.st_mode)) {
+			/* regular file, mmap it */
+			bin = mmap(0, sb.st_size, PROT_READ, MAP_SHARED, in, 0);
+			if (bin == MAP_FAILED) {
+				pr_err("%s: %s: %s\n", filename,
+				       "mmap", strerror(errno));
+				goto bin_close;
+			}
+		} else {
+			pr_err("%s: not a regular file (mode:%d).\n",
+			       filename, sb.st_mode);
+			goto bin_close;
+		}
+
+		ret = script_decompile_bin(bin, sb.st_size, filename, script);
+		if (munmap(bin, sb.st_size) == -1) {
+			pr_err("%s: %s: %s\n", filename,
+			       "munmap", strerror(errno));
+		}
+bin_close:
+		close(in);
 		}; break;
 	}
 	return ret;
@@ -62,6 +99,17 @@ static inline int script_generate(enum script_format format,
 	int ret = 0;
 	switch (format) {
 	case FEX_SCRIPT_FORMAT: {
+		FILE *out = stdout;
+
+		if (!filename)
+			filename = "<stdout>";
+		else if ((out = fopen(filename, "w")) == NULL) {
+			pr_err("%s: %s\n", filename, strerror(errno));
+			break;
+		}
+
+		ret = script_generate_fex(out, filename, script);
+		fclose(out);
 		}; break;
 	case BIN_SCRIPT_FORMAT: {
 		int out = 1; /* stdout */
@@ -71,14 +119,14 @@ static inline int script_generate(enum script_format format,
 		if (!filename)
 			filename = "<stdout>";
 		else if ((out = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0) {
-			errf("%s: %s\n", filename, strerror(errno));
+			pr_err("%s: %s\n", filename, strerror(errno));
 			break;
 		}
 
 		bin_size = script_bin_size(script, &sections, &entries);
 		bin = calloc(1, bin_size);
 		if (!bin)
-			perror("malloc");
+			pr_err("%s: %s\n", "malloc", strerror(errno));
 		else if (script_generate_bin(bin, bin_size, script, sections, entries)) {
 			while(bin_size) {
 				ssize_t wc = write(out, bin, bin_size);
@@ -87,14 +135,16 @@ static inline int script_generate(enum script_format format,
 					bin += wc;
 					bin_size -= wc;
 				} else if (wc < 0 && errno != EINTR) {
-					pr_err("%s: write: %s\n", filename,
-					       strerror(errno));
+					pr_err("%s: %s: %s\n", filename,
+					       "write", strerror(errno));
 					break;
 				}
 			}
 			if (bin_size == 0)
 				ret = 0;
 		}
+		free(bin);
+		close(out);
 		}; break;
 	}
 	return ret;
diff --git a/script_bin.c b/script_bin.c
index 6ee89b2..ede5bc7 100644
--- a/script_bin.c
+++ b/script_bin.c
@@ -208,3 +208,10 @@ int script_generate_bin(void *bin, size_t UNUSED(bin_size),
 	}
 	return 1;
 }
+
+int script_decompile_bin(void *UNUSED(bin), size_t UNUSED(bin_size),
+			 const char *UNUSED(filename),
+			 struct script *UNUSED(script))
+{
+	return 0;
+}
diff --git a/script_bin.h b/script_bin.h
index 1830cfa..d9051a0 100644
--- a/script_bin.h
+++ b/script_bin.h
@@ -22,5 +22,7 @@ size_t script_bin_size(struct script *script,
 
 int script_generate_bin(void *bin, size_t bin_size, struct script *script,
 			size_t sections, size_t entries);
-
+int script_decompile_bin(void *bin, size_t bin_size,
+			 const char *filename,
+			 struct script *script);
 #endif
diff --git a/script_fex.c b/script_fex.c
index e4409be..bb1ab80 100644
--- a/script_fex.c
+++ b/script_fex.c
@@ -220,3 +220,9 @@ parse_error:
 		ok = 0;
 	return ok;
 }
+
+int script_generate_fex(FILE *UNUSED(out), const char *UNUSED(filename),
+			struct script *UNUSED(script))
+{
+	return 0;
+}
diff --git a/script_fex.h b/script_fex.h
index 6c24179..1b074f2 100644
--- a/script_fex.h
+++ b/script_fex.h
@@ -18,5 +18,6 @@
 #define _SUBXI_TOOLS_SCRIPT_FEX_H
 
 int script_parse_fex(FILE *in, const char *filename, struct script *script);
+int script_generate_fex(FILE *out, const char *filename, struct script *script);
 
 #endif