diff --git a/README b/README
index 4a511b0..742cd63 100644
--- a/README
+++ b/README
@@ -6,10 +6,11 @@
   highly portable and to cover common problems that can't be easily solved with
   shell.
 
-    -strcmp: Exits with 0 if the provided pair of strings differs. Otherwise, 1.
-    -vis: Replaces non-printing and non-ASCII characters with octal values.
+    -strcmp: Exits with 0 if the provided pair of strings differs. Otherwise, 1. [done]
+    -vis: Replaces non-printing and non-ASCII characters with octal values. [done]
     -unfold: Exactly what it sounds like. unfold will attempt to merge lines
              with fewer than the provided number of characters with the next
 	     line, so long as it doesn't cause a word-split.
-    -overwrite: Reads stdin and writes it to the provided file.
+    -overwrite: Reads stdin and writes it to the provided file. [done]
+    -shuf: Accepts an arbitrary number of arguments; returns one at random. 
     
diff --git a/src/Makefile b/src/Makefile
index 1ebdd75..90464b2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -16,6 +16,9 @@ install: all
 clean:
 	rm *.o $(BINS) *~ a.out
 
+check:
+	splint +checks +posix-strict-lib +showsummary +forcehints +showscan +showsourceloc +toctou +its4low +its4moderate +its4risky +its4veryrisky +its4mostrisky +bufferoverflow *.c *.h
+
 .SUFFIX:
 .c.o:
 	cc -c -o $< $(CFLAGS) $(LDFLAGS) 
diff --git a/src/overwrite.c b/src/overwrite.c
index 14aa99a..76cdb71 100644
--- a/src/overwrite.c
+++ b/src/overwrite.c
@@ -1,4 +1,4 @@
-/* overwrite.c -- program to exhaust stdin, then write it to a file */
+/* Overwrite.c -- program to exhaust stdin, then write it to a file */
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -10,7 +10,9 @@
 int main(int argc, char **argv)
     {
     int buflen, strlen;
+    int c;
     char *buf;
+    FILE *fp;
     strlen = 0;
     buflen = 0;
     /* arbitrary */
@@ -23,9 +25,7 @@ int main(int argc, char **argv)
 
     if((buf = malloc(buflen)))
 	{
-	int c;
 	c = 0;
-	FILE *fp;
 	
 	for(;((c = getchar()) != EOF);)
 	    {
diff --git a/src/support.h b/src/support.h
index a00f932..b655b5e 100644
--- a/src/support.h
+++ b/src/support.h
@@ -44,17 +44,17 @@ void throw(long unsigned int condition, void *info)
     {
     switch(condition)
 	{
-	case UNKNOWN_FAIL: fprintf(stderr, "unknown failure\n");
+	case UNKNOWN_FAIL: printf("unknown failure\n");
 	    exit(UNKNOWN_FAIL);
-	case MALLOC_FAIL: fprintf(stderr, "malloc failure\n");
+	case MALLOC_FAIL: printf("malloc failure\n");
 	    exit(MALLOC_FAIL);
-	case NEEDARG_FAIL: fprintf(stderr, "usage: %s\n", (char *) info);
+	case NEEDARG_FAIL: printf("usage: %s\n", (char *) info);
 	    exit(NEEDARG_FAIL);
-	case FOPEN_FAIL: fprintf(stderr, "failed to open: %s\n", (char *) info);
+	case FOPEN_FAIL: printf("failed to open: %s\n", (char *) info);
 	    exit(FOPEN_FAIL);
-	case WRITE_FAIL: fprintf(stderr, "failed to write: %s\n", (char *) info);
+	case WRITE_FAIL: printf("failed to write: %s\n", (char *) info);
 	    exit(WRITE_FAIL);
-	default: fprintf(stderr, "You shouldn't be seeing this.\nSomething is very wrong.\n");
+	default: printf("You shouldn't be seeing this.\nSomething is very wrong.\n");
 	    exit(-256);
 	}
     }