Allow specification of cache-size to pwd_mkdb

PR:		5193
Reviewed by:	phk
Submitted by:	Nick Hilliard <nick@foobar.org>

2 files changed, 14 insertions, 2 deletions

diff --git a/usr.sbin/pwd_mkdb/pwd_mkdb.8 b/usr.sbin/pwd_mkdb/pwd_mkdb.8
index d097e7a..54abc76 100644
--- a/usr.sbin/pwd_mkdb/pwd_mkdb.8
+++ b/usr.sbin/pwd_mkdb/pwd_mkdb.8
@@ -42,6 +42,7 @@
 .Op Fl C
 .Op Fl p
 .Op Fl d Ar directory
+.Op Fl s Ar cachesize
 .Op Fl u Ar username
 .Ar file
 .Sh DESCRIPTION
@@ -76,6 +77,14 @@ Store databases into specified destination directory instead of
 Only update the record for the specified user.  Utilities that
 operate on a single user can use this option to avoid the
 overhead of rebuilding the entire database.
+.It Fl s Ar cachesize
+Specify in megabytes the size of the memory cache used by the
+hashing library.  On systems with a large user base, a small cache
+size can lead to prohibitively long database file rebuild times.
+As a rough guide, the memory usage of
+.Nm pwd_mkdb
+in megabytes will be a little bit more than twice the figure
+specified here.  The default is 2 megabytes.
 .El
 .Pp
 The two databases differ in that the secure version contains the user's 
diff --git a/usr.sbin/pwd_mkdb/pwd_mkdb.c b/usr.sbin/pwd_mkdb/pwd_mkdb.c
index d8bf7af..2a8023e 100644
--- a/usr.sbin/pwd_mkdb/pwd_mkdb.c
+++ b/usr.sbin/pwd_mkdb/pwd_mkdb.c
@@ -42,7 +42,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)pwd_mkdb.c	8.5 (Berkeley) 4/20/94";
 #endif
 static const char rcsid[] =
-	"$Id: pwd_mkdb.c,v 1.23 1998/02/16 19:08:18 guido Exp $";
+	"$Id: pwd_mkdb.c,v 1.24 1998/02/19 08:12:11 guido Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -114,7 +114,7 @@ main(argc, argv)
 	strcpy(prefix, _PATH_PWD);
 	makeold = 0;
 	username = NULL;
-	while ((ch = getopt(argc, argv, "Cd:pu:v")) != -1)
+	while ((ch = getopt(argc, argv, "Cd:ps:u:v")) != -1)
 		switch(ch) {
 		case 'C':                       /* verify only */
 			Cflag = 1;
@@ -125,6 +125,9 @@ main(argc, argv)
 		case 'p':			/* create V7 "file.orig" */
 			makeold = 1;
 			break;
+		case 's':			/* change default cachesize */
+			openinfo.cachesize = atoi(optarg) * 1024 * 1024;
+			break;
 		case 'u':			/* only update this record */
 			username = optarg;
 			break;