2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1998-2002
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "system/network.h"
24 #include "system/filesys.h"
27 The idea is that this file will eventually have wrappers around all
28 important system calls in samba. The aims are:
30 - to enable easier porting by putting OS dependent stuff in here
32 - to allow for hooks into other "pseudo-filesystems"
34 - to allow easier integration of things like the japanese extensions
36 - to support the philosophy of Samba to expose the features of
37 the OS within the SMB model. In general whatever file/printer/variable
38 expansions/etc make sense to the OS should be acceptable to Samba.
43 /*******************************************************************
44 A wrapper for usleep in case we don't have one.
45 ********************************************************************/
47 int sys_usleep(long usecs)
54 * We need this braindamage as the glibc usleep
55 * is not SPEC1170 complient... grumble... JRA.
58 if(usecs < 0 || usecs > 1000000) {
66 #else /* HAVE_USLEEP */
68 * Fake it with select...
71 tval.tv_usec = usecs/1000;
72 select(0,NULL,NULL,NULL,&tval);
74 #endif /* HAVE_USLEEP */
78 /*******************************************************************
79 A read wrapper that will deal with EINTR.
80 ********************************************************************/
82 ssize_t sys_read(int fd, void *buf, size_t count)
87 ret = read(fd, buf, count);
88 } while (ret == -1 && errno == EINTR);
92 /*******************************************************************
93 A write wrapper that will deal with EINTR.
94 ********************************************************************/
96 ssize_t sys_write(int fd, const void *buf, size_t count)
101 ret = write(fd, buf, count);
102 } while (ret == -1 && errno == EINTR);
108 /**************************************************************************
109 A wrapper for gethostbyname() that tries avoids looking up hostnames
110 in the root domain, which can cause dial-on-demand links to come up for no
112 ****************************************************************************/
114 struct hostent *sys_gethostbyname(const char *name)
116 #ifdef REDUCE_ROOT_DNS_LOOKUPS
117 char query[256], hostname[256];
120 /* Does this name have any dots in it? If so, make no change */
122 if (strchr_m(name, '.'))
123 return(gethostbyname(name));
125 /* Get my hostname, which should have domain name
126 attached. If not, just do the gethostname on the
130 gethostname(hostname, sizeof(hostname) - 1);
131 hostname[sizeof(hostname) - 1] = 0;
132 if ((domain = strchr_m(hostname, '.')) == NULL)
133 return(gethostbyname(name));
135 /* Attach domain name to query and do modified query.
136 If names too large, just do gethostname on the
140 if((strlen(name) + strlen(domain)) >= sizeof(query))
141 return(gethostbyname(name));
143 slprintf(query, sizeof(query)-1, "%s%s", name, domain);
144 return(gethostbyname(query));
145 #else /* REDUCE_ROOT_DNS_LOOKUPS */
146 return(gethostbyname(name));
147 #endif /* REDUCE_ROOT_DNS_LOOKUPS */
150 const char *sys_inet_ntoa(struct ipv4_addr in)
153 in2.s_addr = in.addr;
154 return inet_ntoa(in2);
157 struct ipv4_addr sys_inet_makeaddr(int net, int host)
160 struct ipv4_addr in2;
161 in = inet_makeaddr(net, host);
162 in2.addr = in.s_addr;