diff --git a/section_1/funcs/file_ops.s b/section_1/funcs/file_ops.s
index b7c0b72..2851c8d 100644
--- a/section_1/funcs/file_ops.s
+++ b/section_1/funcs/file_ops.s
@@ -19,16 +19,26 @@ fd 		.req	w28
 main:   stp     x29, x30, [sp, -16]!
         stp     x27, x28, [sp, -16]!
         bl      open_file
-        cbz     x0, 1f
+		// w0 will contain either the file descriptor of the new
+		// file or -1 for a failure. Note that the value in w0
+		// has also been copied to "fd" - a register alias.
+		cmp 	w0, wzr
+		bge 	1f
         // If we get here, the open has failed. Use perror() to
-        // print a meaningful error and exit.
+        // print a meaningful error and branch to exit. The return
+		// code of the program will be set to non-zero inside open_fail.
         bl      open_fail
         b       99f
 
-1:		// When we get here, the file is open.
+1:		// When we get here, the file is open. Write some data to it.
+		// If write_file returns non-zero, it signifies an error. If
+		// so, branch to the file closing code since the file is open.
+		// The error message will be printed in write_data.
+		bl		write_data
+		cbnz	w0, 10f
 
 		// When we get here, we are done. Close the file.
-		mov		w0, fd
+10:		mov		w0, fd
 		bl 		close
 		mov 	retval, wzr
 
@@ -45,8 +55,12 @@ main:   stp     x29, x30, [sp, -16]!
 
 open_file:
        stp      x29, x30, [sp, -16]!
-       ldp      x29, x30, [sp], 16
-	   mov      x0, 1
+	   ldr		x0, =fname
+	   mov		w1, 0102
+	   mov		w2, 0600
+	   bl		open
+	   mov		fd, w0
+	   ldp		x29, x30, [sp], 16
        ret
 
 
@@ -62,9 +76,14 @@ open_fail:
         ldp     x29, x30, [sp], 16
         ret
 
+write_data:
+        stp     x29, x30, [sp, -16]!
+        ldp     x29, x30, [sp], 16
+        ret
 
 		.data
 prog:	.asciz	"file_ops"
 fname:	.asciz	"test.txt"
-
+txt:	.asciz	"some data\n"
+txt_s:	.word	txt_s - txt - 1		// strlen(txt)
 		.end
diff --git a/section_1/funcs/foo.c b/section_1/funcs/foo2.c
similarity index 100%
rename from section_1/funcs/foo.c
rename to section_1/funcs/foo2.c
diff --git a/section_1/funcs/fops.c b/section_1/funcs/fops.c
index e881002..88b355f 100644
--- a/section_1/funcs/fops.c
+++ b/section_1/funcs/fops.c
@@ -6,8 +6,8 @@
 int main(int argc, char **argv) {
     char * fname = "test.txt";
     char * p_legend = NULL;
-    int fd = open(fname, O_RDWR | O_CREAT, 00600);
-    int retval = 0;
+	int fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
+	int retval = 0;
     off_t seek_return;
     char buffer[80];
 
@@ -15,7 +15,10 @@ int main(int argc, char **argv) {
         p_legend = fname;
         goto out;
     } else {
-        printf("Flags used to open file: %o\n", O_RDWR | O_CREAT);
+        printf("Flags used to open file: 0%o 0%o\n", 
+			O_RDWR | O_CREAT,
+			S_IRUSR | S_IWUSR
+		);
         for (int counter = 0; counter < 10; counter++) {
             if (write(fd, "data\n", 5) != 5) {
                 p_legend = "On writing";
@@ -39,10 +42,12 @@ int main(int argc, char **argv) {
 
 out:    if (fd >= 0) {
             close(fd);
-            if (unlink(fname)) {
+/*             if (unlink(fname)) {
                 p_legend = "On unlinking";
-            }
-        }
+            } else {
+				printf("All went well. File is deleted.\n");
+			}
+ */        }
 
         if (p_legend != NULL) {
             perror(p_legend);