Prevent rdist from dumping core: do not free() pointer before using it.

Add rcsid. Document -D flag (debug mode). Remove unused includes.
PR:bin/3158 (part 1)

usr.bin/rdist/docmd.c

@@ -32,9 +32,11 @@
  */
 
 #ifndef lint
-/*static char sccsid[] = "From: @(#)docmd.c	8.1 (Berkeley) 6/9/93";*/
+#if 0
+static char sccsid[] = "From: @(#)docmd.c	8.1 (Berkeley) 6/9/93";
+#endif
 static const char rcsid[] =
-	"$Id: docmd.c,v 1.9 1997/02/22 19:56:40 peter Exp $";
+	"$Id$";
 #endif /* not lint */
 
 #include "defs.h"
@@ -185,13 +187,16 @@ done:
 		if (sc->sc_type == NOTIFY)
 			notify(tempfile, rhost, sc->sc_args, 0);
 	if (!nflag) {
+		struct linkbuf *nextihead;
+
 		(void) unlink(tempfile);
-		for (; ihead != NULL; ihead = ihead->nextp) {
-			free(ihead);
+		for (; ihead != NULL; ihead = nextihead) {
+			nextihead = ihead->nextp;
 			if ((opts & IGNLNKS) || ihead->count == 0)
 				continue;
 			log(lfp, "%s: Warning: missing links\n",
 				ihead->pathname);
+			free(ihead);
 		}
 	}
 }

usr.bin/rdist/expand.c

@@ -32,7 +32,11 @@
  */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)expand.c	8.1 (Berkeley) 6/9/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
 #endif /* not lint */
 
 #include "defs.h"

usr.bin/rdist/gram.y

@@ -33,7 +33,11 @@
  */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)gram.y	8.1 (Berkeley) 6/9/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
 #endif /* not lint */
 
 #include "defs.h"

usr.bin/rdist/lookup.c

@@ -32,7 +32,11 @@
  */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)lookup.c	8.1 (Berkeley) 6/9/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
 #endif /* not lint */
 
 #include "defs.h"

usr.bin/rdist/main.c

@@ -35,14 +35,11 @@
 static const char copyright[] =
 "@(#) Copyright (c) 1983, 1993\n\
 	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
 #if 0
 static char sccsid[] = "@(#)main.c	8.1 (Berkeley) 6/9/93";
 #endif
 static const char rcsid[] =
-	"$Id$";
+	"$Id: main.c,v 1.3 1997/08/05 06:41:26 charnier Exp $";
 #endif /* not lint */
 
 #include "defs.h"

usr.bin/rdist/rdist.1

@@ -39,14 +39,14 @@
 .Nd remote file distribution program
 .Sh SYNOPSIS
 .Nm
-.Op Fl nqbRhivwy
+.Op Fl nqbRhivwyD
 .Op Fl P Ar rshcmd
 .Op Fl f Ar distfile
 .Op Fl d Ar var=value
 .Op Fl m Ar host
 .Op Ar name ...
 .Nm rdist
-.Op Fl nqbRhivwy
+.Op Fl nqbRhivwyD
 .Op Fl P Ar rshcmd
 .Fl c
 .Ar name ...
@@ -191,6 +191,8 @@ not to update files that are younger than the master copy.
 This can be used
 to prevent newer copies on other hosts from being replaced.
 A warning message is printed for files which are newer than the master copy.
+.It Fl D
+Debug mode.
 .El
 .Pp
 .Ar Distfile

usr.bin/rdist/rshrcmd.c

@@ -5,23 +5,18 @@
  */
 
 #ifndef lint
-static char RCSid[] = 
-"$Id$";
-#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
 
 #include	"defs.h"
 
 #if	!defined(DIRECT_RCMD)
 
-#include      <sys/types.h>
 #include      <sys/socket.h>
 #include      <sys/wait.h>
 #include      <signal.h>
-#include      <errno.h>
 #include      <netdb.h>
-#include      <stdio.h>
-#include      <unistd.h>
-#include      <stdlib.h>
 
 static char *
 xbasename(s)

usr.bin/rdist/server.c

@@ -32,7 +32,11 @@
  */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)server.c	8.1 (Berkeley) 6/9/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
 #endif /* not lint */
 
 #include <sys/wait.h>
@@ -41,7 +45,7 @@ static char sccsid[] = "@(#)server.c	8.1 (Berkeley) 6/9/93";
 #define	ack() 	(void) write(rem, "\0\n", 2)
 #define	err() 	(void) write(rem, "\1\n", 2)
 
-struct	linkbuf *ihead;		/* list of files with more than one link */
+struct	linkbuf *ihead = NULL;	/* list of files with more than one link */
 char	buf[BUFSIZ];		/* general purpose buffer */
 char	target[BUFSIZ];		/* target/source directory name */
 char	*tp;			/* pointer to end of target name */