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authorJelmer Vernooij <jelmer@samba.org>2008-10-11 21:05:38 +0200
committerJelmer Vernooij <jelmer@samba.org>2008-10-11 21:05:38 +0200
commitcaa4e428604780bb098060f7286c69d30c8b4007 (patch)
treebe6ca91d7ba94b888343b21482bc83f8e25bcccb /lib/util/system.c
parent4604ca430294d8d9a522dd29705e7a7a1c969304 (diff)
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Move lib/util from source4 to top-level libutil.
Conflicts: source4/Makefile
Diffstat (limited to 'lib/util/system.c')
-rw-r--r--lib/util/system.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/util/system.c b/lib/util/system.c
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+++ b/lib/util/system.c
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+/*
+ Unix SMB/CIFS implementation.
+ Samba system utilities
+ Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Jeremy Allison 1998-2002
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/network.h"
+#include "system/filesys.h"
+
+/*
+ The idea is that this file will eventually have wrappers around all
+ important system calls in samba. The aims are:
+
+ - to enable easier porting by putting OS dependent stuff in here
+
+ - to allow for hooks into other "pseudo-filesystems"
+
+ - to allow easier integration of things like the japanese extensions
+
+ - to support the philosophy of Samba to expose the features of
+ the OS within the SMB model. In general whatever file/printer/variable
+ expansions/etc make sense to the OS should be acceptable to Samba.
+*/
+
+/**************************************************************************
+A wrapper for gethostbyname() that tries avoids looking up hostnames
+in the root domain, which can cause dial-on-demand links to come up for no
+apparent reason.
+****************************************************************************/
+
+_PUBLIC_ struct hostent *sys_gethostbyname(const char *name)
+{
+#ifdef REDUCE_ROOT_DNS_LOOKUPS
+ char query[256], hostname[256];
+ char *domain;
+
+ /* Does this name have any dots in it? If so, make no change */
+
+ if (strchr(name, '.'))
+ return(gethostbyname(name));
+
+ /* Get my hostname, which should have domain name
+ attached. If not, just do the gethostname on the
+ original string.
+ */
+
+ gethostname(hostname, sizeof(hostname) - 1);
+ hostname[sizeof(hostname) - 1] = 0;
+ if ((domain = strchr(hostname, '.')) == NULL)
+ return(gethostbyname(name));
+
+ /* Attach domain name to query and do modified query.
+ If names too large, just do gethostname on the
+ original string.
+ */
+
+ if((strlen(name) + strlen(domain)) >= sizeof(query))
+ return(gethostbyname(name));
+
+ slprintf(query, sizeof(query)-1, "%s%s", name, domain);
+ return(gethostbyname(query));
+#else /* REDUCE_ROOT_DNS_LOOKUPS */
+ return(gethostbyname(name));
+#endif /* REDUCE_ROOT_DNS_LOOKUPS */
+}
+
+_PUBLIC_ struct in_addr sys_inet_makeaddr(int net, int host)
+{
+ struct in_addr in;
+ struct in_addr in2;
+ in = inet_makeaddr(net, host);
+ in2.s_addr = in.s_addr;
+ return in2;
+}
+