diff --git a/ebind.h b/ebind.h
index 6e25fdb..20551fc 100644
--- a/ebind.h
+++ b/ebind.h
@@ -409,10 +409,10 @@ KEYTAB keytab[NBINDS] = {
 	,
 
 	/* special internal bindings */
-	SPEC | META | 'W', wrapword,	/* called on word wrap */
-	SPEC | META | 'C', nullproc,	/*  every command input */
-	SPEC | META | 'R', nullproc,	/*  on file read */
-	SPEC | META | 'X', nullproc,	/*  on window change P.K. */
+	{ SPEC | META | 'W', wrapword },	/* called on word wrap */
+	{ SPEC | META | 'C', nullproc },	/*  every command input */
+	{ SPEC | META | 'R', nullproc },	/*  on file read */
+	{ SPEC | META | 'X', nullproc },	/*  on window change P.K. */
 
 	{0, NULL}
 };
diff --git a/efunc.h b/efunc.h
index b408b77..199aeb8 100644
--- a/efunc.h
+++ b/efunc.h
@@ -120,7 +120,7 @@ extern int istring(int f, int n);
 extern int ovstring(int f, int n);
 
 /* main.c */
-extern int edinit(char *bname);
+extern void edinit(char *bname);
 extern int execute(int c, int f, int n);
 extern int quickexit(int f, int n);
 extern int quit(int f, int n);
@@ -320,7 +320,7 @@ extern int cbuf40(int f, int n);
 
 /* spawn.c */
 extern int spawncli(int f, int n);
-extern void bktoshell(void);
+extern int bktoshell(int f, int n);
 extern void rtfrmshell(void);
 extern int spawn(int f, int n);
 extern int execprg(int f, int n);
diff --git a/lock.c b/lock.c
index 25603a9..31a5e92 100644
--- a/lock.c
+++ b/lock.c
@@ -14,9 +14,6 @@
 #if	BSD | SVR4
 #include <sys/errno.h>
 
-extern int sys_nerr;		/* number of system error messages defined */
-extern int errno;		/* current error */
-
 char *lname[NLOCKS];		/* names of all locked files */
 int numlocks;			/* # of current locks active */
 
@@ -157,10 +154,7 @@ void lckerror(char *errstr)
 
 	strcpy(obuf, errstr);
 	strcat(obuf, " - ");
-	if (errno < sys_nerr)
-		strcat(obuf, sys_errlist[errno]);
-	else
-		strcat(obuf, "(can not get system error message)");
+	strcat(obuf, strerror(errno));
 	mlwrite(obuf);
 }
 #endif
diff --git a/main.c b/main.c
index 1db1389..6b5a802 100644
--- a/main.c
+++ b/main.c
@@ -94,7 +94,7 @@ int emacs(int argc, char **argv)
 int main(int argc, char **argv)
 #endif
 {
-	register int c;		/* command character */
+	register int c = -1;	/* command character */
 	register int f;		/* default flag */
 	register int n;		/* numeric repeat count */
 	register int mflag;	/* negative flag on repeat */
@@ -115,7 +115,6 @@ int main(int argc, char **argv)
 	int cryptflag;		/* encrypting on the way in? */
 	char ekey[NPAT];	/* startup encryption key */
 #endif
-	extern *pathname[];	/* startup file path/name array */
 	int newc;
 
 #if	PKCODE & VMS
@@ -373,7 +372,7 @@ int main(int argc, char **argv)
 		n = 4;		/* with argument of 4 */
 		mflag = 0;	/* that can be discarded. */
 		mlwrite("Arg: 4");
-		while ((c = getcmd()) >= '0' && c <= '9' || c == reptc
+		while (((c = getcmd()) >= '0' && c <= '9') || c == reptc
 		       || c == '-') {
 			if (c == reptc)
 				if ((n > 0) == ((n * 4) > 0))
@@ -425,7 +424,7 @@ int main(int argc, char **argv)
  * as an argument, because the main routine may have been told to read in a
  * file by default, and we want the buffer name to be right.
  */
-int edinit(char *bname)
+void edinit(char *bname)
 {
 	register BUFFER *bp;
 	register WINDOW *wp;
@@ -706,20 +705,28 @@ int resterr(void)
 	return (FALSE);
 }
 
+/* user function that does NOTHING */
 int nullproc(int f, int n)
-{				/* user function that does NOTHING */
+{
+	return (TRUE);
 }
 
+/* dummy function for binding to meta prefix */
 int meta(int f, int n)
-{				/* dummy function for binding to meta prefix */
+{
+	return (TRUE);
 }
 
+/* dummy function for binding to control-x prefix */
 int cex(int f, int n)
-{				/* dummy function for binding to control-x prefix */
+{
+	return (TRUE);
 }
 
+/* dummy function for binding to universal-argument */
 int unarg(int f, int n)
-{				/* dummy function for binding to universal-argument */
+{
+	return (TRUE);
 }
 
 /*****		Compiler specific Library functions	****/
diff --git a/posix.c b/posix.c
index b9b0ada..cc09d03 100644
--- a/posix.c
+++ b/posix.c
@@ -13,6 +13,7 @@
 #ifdef POSIX
 
 #include <stdio.h>
+#include <unistd.h>
 #include "estruct.h"
 #include "edef.h"
 #include "efunc.h"
@@ -23,9 +24,7 @@
 #include <errno.h>
 
 static int kbdflgs;			/* saved keyboard fd flags      */
-static int kbdpoll;			/* in O_NDELAY mode                     */
-static int kbdqp;			/* there is a char in kbdq      */
-static char kbdq;			/* char we've already read      */
+static int kbdpoll;			/* in O_NDELAY mode             */
 
 static struct termios otermios;		/* original terminal characteristics */
 static struct termios ntermios;		/* charactoristics to use inside */
@@ -101,6 +100,7 @@ void ttclose(void)
 int ttputc(int c)
 {
 	fputc(c, stdout);
+	return (TRUE);
 }
 
 /*
diff --git a/spawn.c b/spawn.c
index 7290e0c..3195a9b 100644
--- a/spawn.c
+++ b/spawn.c
@@ -5,6 +5,7 @@
  */
 
 #include        <stdio.h>
+#include        <unistd.h>
 #include	"estruct.h"
 #include        "edef.h"
 #include        "efunc.h"
@@ -104,16 +105,17 @@ int spawncli(int f, int n)
 
 #if	BSD | __hpux | SVR4
 
-void bktoshell(void)
+int bktoshell(int f, int n)
 {				/* suspend MicroEMACS and wait to wake up */
-	int pid;
-
 	vttidy();
 /******************************
+	int pid;
+
 	pid = getpid();
 	kill(pid,SIGTSTP);
 ******************************/
 	kill(0, SIGTSTP);
+	return (TRUE);
 }
 
 void rtfrmshell(void)