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When printing out nodes of type "string", don't print anything if 

sysctl() reports that 0 bytes were returned.

Reported by Matt Green with "sysctl hw.disknames" on a system with no
disks.
This commit is contained in:
simonb 2002-11-03 07:06:06 +00:00
parent 95aae207e0
commit f8c2d639ce
1 changed files with 5 additions and 2 deletions
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7
sbin/sysctl/sysctl.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sysctl.c,v 1.58 2002/03/24 00:11:00 sommerfeld Exp $ */
/* $NetBSD: sysctl.c,v 1.59 2002/11/03 07:06:06 simonb Exp $ */
/*
* Copyright (c) 1993
@ -44,7 +44,7 @@ __COPYRIGHT(
#if 0
static char sccsid[] = "@(#)sysctl.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: sysctl.c,v 1.58 2002/03/24 00:11:00 sommerfeld Exp $");
__RCSID("$NetBSD: sysctl.c,v 1.59 2002/11/03 07:06:06 simonb Exp $");
#endif
#endif /* not lint */
@ -661,6 +661,9 @@ parse(char *string, int flags)
return;
case CTLTYPE_STRING:
/* If sysctl() didn't return any data, don't print a string. */
if (size == 0)
buf[0] = '\0';
if (newsize == 0) {
if (!nflag)
printf("%s = ", string);