Patch to init

This patch brings sbin/init into WARNS=6 compliance. It depends upon the 
execve 'constification' patch submitted prior.

--- sbin/init/init.c.orig    2005-02-24 00:20:41.000000000 -0800
+++ sbin/init/init.c    2005-02-24 01:12:44.000000000 -0800
@@ -95,12 +95,13 @@
 void handle(sig_t, ...);
 void delset(sigset_t *, ...);
 
-void stall(char *, ...);
-void warning(char *, ...);
-void emergency(char *, ...);
+void stall(const char *, ...);
+void warning(const char *, ...);
+void emergency(const char *, ...);
 void disaster(int);
 void badsys(int);
 int  runshutdown(void);
+char *strk(char *);
 
 /*
  * We really need a recursive typedef...
@@ -128,7 +129,7 @@
 void transition(state_t);
 state_t requested_transition = runcom;
 
-void setctty(char *);
+void setctty(const char *);
 
 typedef struct init_session {
     int    se_index;        /* index of entry in ttys file */
@@ -376,7 +377,7 @@
  * NB: should send a message to the session logger to avoid blocking.
  */
 void
-stall(char *message, ...)
+stall(const char *message, ...)
 {
     va_list ap;
 
@@ -393,7 +394,7 @@
  * NB: should send a message to the session logger to avoid blocking.
  */
 void
-warning(char *message, ...)
+warning(const char *message, ...)
 {
     va_list ap;
 
@@ -408,7 +409,7 @@
  * NB: should send a message to the session logger to avoid blocking.
  */
 void
-emergency(char *message, ...)
+emergency(const char *message, ...)
 {
     va_list ap;
 
@@ -476,6 +477,8 @@
  * kernel environment (or NULL if not set).
  * (Most of this has been copied from src/usr.bin/kenv/kenv.c.)
  */
+const char namestring[] = "kern.environment";
+
 char *
 get_chroot(void)
 {
@@ -484,8 +487,8 @@
     int real_oid[CTL_MAXNAME+4];
     int n2oid_oid[2];
     char sbuf[1024];
+    char name[sizeof(namestring)];
     size_t oidlen;
-    char *name;
     char *res;
     int slen;
     int i;
@@ -493,7 +496,7 @@
     n2oid_oid[0] = 0;    /* This is magic & undocumented! */
     n2oid_oid[1] = 3;
     oidlen = sizeof(real_oid);
-    name = "kern.environment";
+    strcpy(name, namestring);    /* ANSI-C has utterly broken const */
 
     if (sysctl(n2oid_oid, 2, real_oid, &oidlen, name, strlen(name)) < 0) {
         warning("cannot find kern.environment base sysctl OID");
@@ -588,7 +591,7 @@
  * Only called by children of init after forking.
  */
 void
-setctty(char *name)
+setctty(const char *name)
 {
     int fd;
 
@@ -612,8 +615,8 @@
     pid_t pid, wpid;
     int status;
     sigset_t mask;
-    char *shell = _PATH_BSHELL;
-    char *argv[2];
+    const char *shell = _PATH_BSHELL;
+    const char *argv[2];
 #ifdef SECURE
     struct ttyent *typ;
     struct passwd *pp;
@@ -761,7 +764,7 @@
 {
     pid_t pid, wpid;
     int status;
-    char *argv[4];
+    const char *argv[4];
     struct sigaction sa;
 
     if ((pid = fork()) == 0) {
@@ -921,7 +924,6 @@
 char **
 construct_argv(char *command)
 {
-    char *strk (char *);
     register int argc = 0;
     register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1)
                         * sizeof (char *));
@@ -1429,9 +1431,8 @@
  * Note SIGALRM.
  */
 void
-alrm_handler(int sig)
+alrm_handler(__attribute__((unused)) int sig)
 {
-    sig;
     clang = 1;
 }
 
@@ -1493,7 +1494,7 @@
     int status;
     int shutdowntimeout;
     size_t len;
-    char *argv[4];
+    const char *argv[4];
     struct sigaction sa;
     struct stat sb;