--- a/alpha_beta.c
+++ b/alpha_beta.c
@@ -48,7 +48,7 @@
 {
     Node *actual;
 
-    if ((actual = malloc (sizeof (Node) + 1)) == NULL) {
+    if ((actual = malloc (sizeof (Node))) == NULL) {
         perror ("MALLOC");
         exit (EXIT_FAILURE);
     }
@@ -176,7 +176,7 @@
             continue;
         }
 
-        if ((move = malloc (sizeof (Move) + 1)) == NULL) {
+        if ((move = malloc (sizeof (Move))) == NULL) {
             perror ("MALLOC");
             exit (EXIT_FAILURE);
         }
@@ -303,7 +303,7 @@
     else
         depth = 1;
 
-    if ((actual = malloc (sizeof (Node) + 1)) == NULL) {
+    if ((actual = malloc (sizeof (Node))) == NULL) {
         perror ("MALLOC");
         return EXIT_FAILURE;
     }

--- a/connection.c
+++ b/connection.c
@@ -55,7 +55,7 @@
 
     if (argc != 3) {
         printf ("Usage: %s <ipaddr> <port>\n", argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     if ((sockfd = connection (argv[1], atoi (argv[2]))) < 0) {

--- a/db_bridge/main.cpp
+++ b/db_bridge/main.cpp
@@ -20,7 +20,7 @@
     std::cout << "\n";
     std::cout << "\t\tDATABASE\t\tVerbindung zur Datenbank DATABASE herstellen\n";
     std::cout << "\nBerichten Sie Fehler oder Anregungen an mbroeker@largo.homelinux.org" << std::endl;
-    exit (0);
+    exit (EXIT_FAILURE);
 }
 
 int main (int argc, char **argv)

--- a/dnsresolve.c
+++ b/dnsresolve.c
@@ -19,7 +19,7 @@
 
     if (argc != 2) {
         fprintf (stderr, "Usage: %s hostname\n", argv[0]);
-        exit (0);
+        return EXIT_FAILURE;
     }
 
     he = gethostbyname (argv[1]);

--- a/gauss.c
+++ b/gauss.c
@@ -99,7 +99,7 @@
         printf ("Benutzung: %s UNBEKANNTE\n", argv[0]);
         printf ("Berechnet ein lineares Gleichungssystem mit n UNBEKANNTEN und n Zeilen ( nxn ).\n");
         printf ("Praktische Beispiele stehen in der README Datei.\n");
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     MAXY = atoi (argv[1]);
@@ -107,7 +107,7 @@
 
     if ((A = calloc (MAXY, sizeof (float *))) == NULL) {
         printf ("Nicht genug Speicher verfuegbar\n");
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     for (i = 0; i < MAXY; i++) {
@@ -117,7 +117,7 @@
                 free (A[k]);
             free (A);
 
-            return EXIT_SUCCESS;
+            return EXIT_FAILURE;
         }
     }
 

--- a/hex2chars.c
+++ b/hex2chars.c
@@ -115,7 +115,7 @@
 
     if (argc != 2) {
         printf ("Usage: %s <string>\n", argv[0]);
-        exit (0);
+        return EXIT_FAILURE;
     }
 
     start = argv[1];

--- a/life.c
+++ b/life.c
@@ -107,7 +107,7 @@
 {
     char *arena[MAX];
 
-    if (argc > 2)
+    if (argc > 1)
         printf ("Usage: %s\n", argv[0]);
 
     if (init_life (arena) == 0)

--- a/max.c
+++ b/max.c
@@ -18,7 +18,7 @@
 
     if (argc != 3) {
         printf ("Usage: %s value1 value2\n", argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
     a = atoi (argv[1]);
     b = atoi (argv[2]);

--- a/mem2swap.c
+++ b/mem2swap.c
@@ -44,9 +44,9 @@
     }
 
     if ((p = malloc (N * size)) == NULL)
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
 
-    while (1) {
+    for (;;) {
         for (i = 0; i < N; i++) {
             p[n * N + i] = size * (n * N + i);
         }

--- a/parser/c_compiler/main.c
+++ b/parser/c_compiler/main.c
@@ -22,7 +22,7 @@
 
     if (argc < 2) {
         usage (argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     if ((fp = fopen (argv[1], "r")) == NULL) {

--- a/parser/calc/main.c
+++ b/parser/calc/main.c
@@ -4,11 +4,13 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 
 extern int yyparse ();
 
 int main (int argc, char **argv)
 {
     yyparse ();
-    return 0;
+
+    return EXIT_SUCCESS;
 }

--- a/prog_limit.c
+++ b/prog_limit.c
@@ -20,7 +20,7 @@
     if (argc < 3) {
         printf ("Usage: %s <mem> <cmd> [args]...\n", argv[0]);
         printf ("Report bugs to mbroeker@largo.homelinux.org\n");
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     if ((args = calloc ((argc - 2), sizeof (char *))) == NULL) {

--- a/recording.c
+++ b/recording.c
@@ -39,7 +39,7 @@
         printf ("Usage: %s <DEVICE>\n", argv[0]);
         printf ("Example: %s /dev/dsp\n", argv[0]);
         printf ("Example: %s /dev/dsp1\n", argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     fd = open (argv[1], O_RDWR);

--- a/recursive_compiler.c
+++ b/recursive_compiler.c
@@ -3,8 +3,8 @@
  * Adapted from: http://de.wikipedia.org/wiki/Compiler
  */
 
+#include <stdio.h>
 #include <stdlib.h>
-#include <stdio.h>
 #include <string.h>
 
 #define MODE_POSTFIX   0
@@ -110,5 +110,5 @@
     lookahead = *expression;
     expr ();
 
-    return 0;
+    return EXIT_SUCCESS;
 }

--- a/sort.c
+++ b/sort.c
@@ -103,5 +103,5 @@
     for (i = 0; i < MAX; i++)
         printf ("%2d %2d %2d\n", a[i], b[i], c[i]);
 
-    return 0;
+    return EXIT_SUCCESS;
 }

--- a/testcase.c
+++ b/testcase.c
@@ -16,7 +16,7 @@
 
     if (argc != 4) {
         printf ("Usage: %s (char*)string (char*)delim1 (char*)delim2\n", argv[0]);
-        return 0;
+        return EXIT_FAILURE;
     }
 
     snprintf (line, 80, "%s\r\n", argv[1]);

--- a/tree.c
+++ b/tree.c
@@ -38,9 +38,11 @@
         if ((t->next = malloc (sizeof (T))) == NULL)
             break;
         t->next->data = GETRANDOM (rand_max);
-        t->next->next = NULL;
         t = t->next;
     }
+
+    t->next = NULL;
+
     return first;
 }
 
@@ -50,7 +52,7 @@
 
     if (argc != 3) {
         printf ("Usage: %s elements rand_max\n", argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     t = make_list (atoi (argv[1]), atoi (argv[2]));

--- a/utf8.c
+++ b/utf8.c
@@ -31,7 +31,7 @@
         dest[2] = 0;
         dest[3] = 0;
         if (wctomb (dest, (*str)) == -1)
-            return -1;
+            return EXIT_FAILURE;
 
         printf ("%lc -> [%4X] (%2X:%2X:%2X:%2X)\n",
                 *str, *str, (u_char) dest[0], (u_char) dest[1], (u_char) dest[2], (u_char) dest[3]);

--- a/xdemo.c
+++ b/xdemo.c
@@ -19,14 +19,14 @@
 
     if (dpy == NULL) {
         printf ("Error opening localhost:0\n");
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     XSynchronize (dpy, 1);
     w = XCreateSimpleWindow (dpy, DefaultRootWindow (dpy), 0, 0, 240, 60, 1, 1, 1);
 
     if (w < 0)
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
 
     printf ("WINDOW-ID: %ld\n", w);