Include proper header files for system functions that are used and

that gcc complains about this code changing from the built-in
versions.

usr.bin/window/compress.c

@@ -47,6 +47,7 @@ static char rcsid[] =
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
+#include <strings.h>
 int cc_trace = 0;
 FILE *cc_trace_fp;
 

usr.bin/window/context.c

@@ -44,6 +44,7 @@ static char rcsid[] =
 #include "mystring.h"
 #include "context.h"
 #include <fcntl.h>
+#include <stdlib.h>
 
 /*
  * Context push/pop for nested command files.

usr.bin/window/lcmd1.c

@@ -46,6 +46,7 @@ static char rcsid[] =
 #include "value.h"
 #include "lcmd.h"
 #include "var.h"
+#include <stdio.h>
 
 struct lcmd_arg arg_window[] = {
 	{ "row",	1,	ARG_NUM },

usr.bin/window/lcmd2.c

@@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
 #include "var.h"
 #include "lcmd.h"
 #include "alias.h"
+#include <stdio.h>
 #include <sys/types.h>
 #include <sys/resource.h>
 

usr.bin/window/scanner.c

@@ -46,6 +46,7 @@ static char rcsid[] =
 #include "context.h"
 #include "string.h"
 #include "mystring.h"
+#include <stdlib.h>
 
 s_getc()
 {

usr.bin/window/startup.c

@@ -45,6 +45,7 @@ static char rcsid[] =
 #include "var.h"
 #include "char.h"
 #include "local.h"
+#include <stdio.h>
 
 doconfig()
 {

usr.bin/window/string.c

@@ -42,6 +42,8 @@ static char rcsid[] =
 
 #include <string.h> /* System string definitions. */
 #include "mystring.h" /* Local string definitions. */
+#include <stdio.h>
+#include <stdlib.h>
 
 char *
 str_cpy(s)

usr.bin/window/ttoutput.c

@@ -43,6 +43,8 @@ static char rcsid[] =
 #include "ww.h"
 #include "tt.h"
 #include <errno.h>
+#include <strings.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*

usr.bin/window/tttermcap.c

@@ -41,6 +41,7 @@ static char rcsid[] =
 #endif /* not lint */
 
 #include "tt.h"
+#include <stdlib.h>
 
 char *tgetstr();
 char *tgoto();

usr.bin/window/ttzapple.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include "ww.h"
 #include "tt.h"
 #include "char.h"
+#include <stdio.h>
 
 /*
 zz|zapple|perfect apple:\

usr.bin/window/var.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include "value.h"
 #include "var.h"
 #include "mystring.h"
+#include <stdlib.h>
 
 struct var *
 var_set1(head, name, v)

usr.bin/window/wwdump.c

@@ -40,6 +40,7 @@ static char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
+#include <stdio.h>
 #include <string.h>
 #include "ww.h"
 #include "tt.h"

usr.bin/window/wwend.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include <signal.h>
 #include "ww.h"
 #include "tt.h"
+#include <stdlib.h>
 
 /*ARGSUSED*/
 int

usr.bin/window/wwenviron.c

@@ -46,6 +46,7 @@ static char rcsid[] =
 #endif
 #include <paths.h>
 #include <signal.h>
+#include <stdio.h>
 
 /*
  * Set up the environment of this process to run in window 'wp'.

usr.bin/window/wwflush.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include "ww.h"
 #include "tt.h"
 #include <signal.h>
+#include <strings.h>
 
 wwflush()
 {

usr.bin/window/wwinit.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include "ww.h"
 #include "tt.h"
 #include <signal.h>
+#include <stdio.h>
 #include <fcntl.h>
 #include <termcap.h>
 #include "char.h"

usr.bin/window/wwpty.c

@@ -43,6 +43,7 @@ static char rcsid[] =
 #include "ww.h"
 #include <fcntl.h>
 #include <stdlib.h>
+#include <string.h>
 #if !defined(OLD_TTY) && !defined(TIOCPKT)
 #include <sys/ioctl.h>
 #endif

usr.bin/window/wwspawn.c

@@ -42,6 +42,7 @@ static char rcsid[] =
 
 #include "ww.h"
 #include <signal.h>
+#include <unistd.h>
 
 /*
  * There is a dead lock with vfork and closing of pseudo-ports.

usr.bin/window/xx.c

@@ -44,6 +44,7 @@ static char rcsid[] =
 #include "xx.h"
 #include "tt.h"
 #include <stdlib.h>
+#include <strings.h>
 
 xxinit()
 {