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/wait.h"
25 #include "system/filesys.h"
28 The idea is that this file will eventually have wrappers around all
29 important system calls in samba. The aims are:
31 - to enable easier porting by putting OS dependent stuff in here
33 - to allow for hooks into other "pseudo-filesystems"
35 - to allow easier integration of things like the japanese extensions
37 - to support the philosophy of Samba to expose the features of
38 the OS within the SMB model. In general whatever file/printer/variable
39 expansions/etc make sense to the OS should be acceptable to Samba.
44 /*******************************************************************
45 A wrapper for usleep in case we don't have one.
46 ********************************************************************/
48 int sys_usleep(long usecs)
55 * We need this braindamage as the glibc usleep
56 * is not SPEC1170 complient... grumble... JRA.
59 if(usecs < 0 || usecs > 1000000) {
67 #else /* HAVE_USLEEP */
69 * Fake it with select...
72 tval.tv_usec = usecs/1000;
73 select(0,NULL,NULL,NULL,&tval);
75 #endif /* HAVE_USLEEP */
79 /*******************************************************************
80 System wrapper for getwd
81 ********************************************************************/
82 char *sys_getwd(char *s)
86 wd = (char *)getcwd(s, sizeof (pstring));
88 wd = (char *)getwd(s);
93 /*******************************************************************
94 A read wrapper that will deal with EINTR.
95 ********************************************************************/
97 ssize_t sys_read(int fd, void *buf, size_t count)
102 ret = read(fd, buf, count);
103 } while (ret == -1 && errno == EINTR);
107 /*******************************************************************
108 A write wrapper that will deal with EINTR.
109 ********************************************************************/
111 ssize_t sys_write(int fd, const void *buf, size_t count)
116 ret = write(fd, buf, count);
117 } while (ret == -1 && errno == EINTR);
123 /*******************************************************************
124 os/2 also doesn't have chroot
125 ********************************************************************/
126 int sys_chroot(const char *dname)
131 DEBUG(1,("WARNING: no chroot!\n"));
137 return(chroot(dname));
141 /**************************************************************************
142 A wrapper for gethostbyname() that tries avoids looking up hostnames
143 in the root domain, which can cause dial-on-demand links to come up for no
145 ****************************************************************************/
147 struct hostent *sys_gethostbyname(const char *name)
149 #ifdef REDUCE_ROOT_DNS_LOOKUPS
150 char query[256], hostname[256];
153 /* Does this name have any dots in it? If so, make no change */
155 if (strchr_m(name, '.'))
156 return(gethostbyname(name));
158 /* Get my hostname, which should have domain name
159 attached. If not, just do the gethostname on the
163 gethostname(hostname, sizeof(hostname) - 1);
164 hostname[sizeof(hostname) - 1] = 0;
165 if ((domain = strchr_m(hostname, '.')) == NULL)
166 return(gethostbyname(name));
168 /* Attach domain name to query and do modified query.
169 If names too large, just do gethostname on the
173 if((strlen(name) + strlen(domain)) >= sizeof(query))
174 return(gethostbyname(name));
176 slprintf(query, sizeof(query)-1, "%s%s", name, domain);
177 return(gethostbyname(query));
178 #else /* REDUCE_ROOT_DNS_LOOKUPS */
179 return(gethostbyname(name));
180 #endif /* REDUCE_ROOT_DNS_LOOKUPS */
185 /**************************************************************************
186 Wrappers for dlopen, dlsym, dlclose.
187 ****************************************************************************/
189 void *sys_dlopen(const char *name, int flags)
191 #if defined(HAVE_DLOPEN)
192 return dlopen(name, flags);
198 void *sys_dlsym(void *handle, const char *symbol)
200 #if defined(HAVE_DLSYM)
201 return dlsym(handle, symbol);
207 const char *sys_dlerror(void)
209 #if defined(HAVE_DLERROR)
216 const char *sys_inet_ntoa(struct ipv4_addr in)
219 in2.s_addr = in.addr;
220 return inet_ntoa(in2);
223 uint32_t sys_inet_addr(const char *s)
228 struct ipv4_addr sys_inet_makeaddr(int net, int host)
231 struct ipv4_addr in2;
232 in = inet_makeaddr(net, host);
233 in2.addr = in.s_addr;