Get rid of warning about unused argument fromshutdown, and make sure the wall string isn't changed by the wall() function.

src/dowall.c

@@ -52,7 +52,7 @@ static void handler(int arg)
 /*
  *	Print a text, escape all characters not in Latin-1.
  */
-static void feputs(char *line, FILE *fp)
+static void feputs(const char *line, FILE *fp)
 {
 	unsigned char		*p;
 
@@ -132,7 +132,7 @@ static int file_isatty(const char *fname)
 /*
  *	Wall function.
  */
-void wall(char *text, int fromshutdown, int remote)
+void wall(const char *text, int remote)
 {
 	FILE			*tp;
 	struct sigaction	sa;

src/init.h

@@ -53,6 +53,9 @@ void initlog(int loglevel, char *fmt, ...);
 void set_term(int how);
 void print(char *fmt);
 
+/* from dowall.c */
+void wall(const char *text, int remote);
+
 #if DEBUG
 #  define INITDBG(level, fmt, args...) initlog(level, fmt, ##args)
 #else

src/shutdown.c

@@ -49,6 +49,8 @@
 #include "paths.h"
 #include "reboot.h"
 #include "initreq.h"
+#include "init.h"
+
 
 char *Version = "@(#) shutdown 2.86-1 31-Jul-2004 miquels@cistron.nl";
 
@@ -72,9 +74,6 @@ char *clean_env[] = {
 	NULL,
 };
 
-/* From "wall.c" */
-extern void wall(char *, int, int);
-
 /* From "utmp.c" */
 extern void write_wtmp(char *user, char *id, int pid, int type, char *line);
 
@@ -206,7 +205,7 @@ void warn(int mins)
   		snprintf(buf + len, sizeof(buf) - len,
 			"\rThe system is going DOWN %s in %d minute%s!\r\n",
 				newstate, mins, mins == 1 ? "" : "s");
-	wall(buf, 1, 0);
+	wall(buf, 0);
 }
 
 /*
@@ -619,7 +618,7 @@ int main(int argc, char **argv)
 			fprintf(stderr, "shutdown: not running.\n");
 			exit(1);
 		}
-		if (message[0]) wall(message, 1, 0);
+		if (message[0]) wall(message, 0);
 		exit(0);
 	}
   

src/wall.c

@@ -29,14 +29,13 @@
 #include <unistd.h>
 #include <pwd.h>
 #include <syslog.h>
+#include "init.h"
 
 
 char *Version = "@(#) wall 2.79 12-Sep-2000 miquels@cistron.nl";
 #define MAXLEN 4096
 #define MAXLINES 20
 
-extern void wall(char *, int, int);
-
 int main(int argc, char **argv)
 {
   char buf[MAXLEN];
@@ -115,7 +114,7 @@ int main(int argc, char **argv)
   closelog();
 
   unsetenv("TZ");
-  wall(buf, 0, remote);
+  wall(buf, remote);
 
   /*NOTREACHED*/
   return 0;