mirror of
https://github.com/samba-team/samba.git
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c9ec1bbbae
(This used to be commit 34ffcd38a5
)
268 lines
6.4 KiB
C
268 lines
6.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba system utilities
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 1998-2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "system/network.h"
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#include "system/wait.h"
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#include "system/filesys.h"
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/*
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The idea is that this file will eventually have wrappers around all
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important system calls in samba. The aims are:
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- to enable easier porting by putting OS dependent stuff in here
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- to allow for hooks into other "pseudo-filesystems"
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- to allow easier integration of things like the japanese extensions
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- to support the philosophy of Samba to expose the features of
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the OS within the SMB model. In general whatever file/printer/variable
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expansions/etc make sense to the OS should be acceptable to Samba.
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*/
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/*******************************************************************
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A wrapper for usleep in case we don't have one.
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********************************************************************/
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int sys_usleep(long usecs)
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{
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#ifndef HAVE_USLEEP
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struct timeval tval;
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#endif
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/*
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* We need this braindamage as the glibc usleep
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* is not SPEC1170 complient... grumble... JRA.
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*/
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if(usecs < 0 || usecs > 1000000) {
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errno = EINVAL;
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return -1;
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}
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#if HAVE_USLEEP
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usleep(usecs);
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return 0;
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#else /* HAVE_USLEEP */
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/*
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* Fake it with select...
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*/
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tval.tv_sec = 0;
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tval.tv_usec = usecs/1000;
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select(0,NULL,NULL,NULL,&tval);
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return 0;
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#endif /* HAVE_USLEEP */
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}
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/*******************************************************************
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System wrapper for getwd
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********************************************************************/
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char *sys_getwd(char *s)
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{
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char *wd;
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#ifdef HAVE_GETCWD
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wd = (char *)getcwd(s, sizeof (pstring));
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#else
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wd = (char *)getwd(s);
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#endif
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return wd;
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}
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/*******************************************************************
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A read wrapper that will deal with EINTR.
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********************************************************************/
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ssize_t sys_read(int fd, void *buf, size_t count)
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{
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ssize_t ret;
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do {
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ret = read(fd, buf, count);
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} while (ret == -1 && errno == EINTR);
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return ret;
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}
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/*******************************************************************
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A write wrapper that will deal with EINTR.
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********************************************************************/
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ssize_t sys_write(int fd, const void *buf, size_t count)
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{
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ssize_t ret;
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do {
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ret = write(fd, buf, count);
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} while (ret == -1 && errno == EINTR);
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return ret;
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}
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/*******************************************************************
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os/2 also doesn't have chroot
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********************************************************************/
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int sys_chroot(const char *dname)
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{
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#ifndef HAVE_CHROOT
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static int done;
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if (!done) {
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DEBUG(1,("WARNING: no chroot!\n"));
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done=1;
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}
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errno = ENOSYS;
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return -1;
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#else
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return(chroot(dname));
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#endif
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}
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/**************************************************************************
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A wrapper for gethostbyname() that tries avoids looking up hostnames
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in the root domain, which can cause dial-on-demand links to come up for no
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apparent reason.
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****************************************************************************/
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struct hostent *sys_gethostbyname(const char *name)
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{
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#ifdef REDUCE_ROOT_DNS_LOOKUPS
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char query[256], hostname[256];
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char *domain;
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/* Does this name have any dots in it? If so, make no change */
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if (strchr_m(name, '.'))
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return(gethostbyname(name));
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/* Get my hostname, which should have domain name
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attached. If not, just do the gethostname on the
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original string.
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*/
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gethostname(hostname, sizeof(hostname) - 1);
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hostname[sizeof(hostname) - 1] = 0;
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if ((domain = strchr_m(hostname, '.')) == NULL)
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return(gethostbyname(name));
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/* Attach domain name to query and do modified query.
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If names too large, just do gethostname on the
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original string.
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*/
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if((strlen(name) + strlen(domain)) >= sizeof(query))
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return(gethostbyname(name));
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slprintf(query, sizeof(query)-1, "%s%s", name, domain);
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return(gethostbyname(query));
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#else /* REDUCE_ROOT_DNS_LOOKUPS */
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return(gethostbyname(name));
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#endif /* REDUCE_ROOT_DNS_LOOKUPS */
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}
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/**************************************************************************
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Wrapper for random().
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****************************************************************************/
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long sys_random(void)
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{
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#if defined(HAVE_RANDOM)
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return (long)random();
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#elif defined(HAVE_RAND)
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return (long)rand();
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#else
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DEBUG(0,("Error - no random function available !\n"));
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exit(1);
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#endif
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}
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/**************************************************************************
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Wrapper for srandom().
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****************************************************************************/
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void sys_srandom(uint_t seed)
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{
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#if defined(HAVE_SRANDOM)
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srandom(seed);
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#elif defined(HAVE_SRAND)
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srand(seed);
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#else
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DEBUG(0,("Error - no srandom function available !\n"));
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exit(1);
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#endif
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}
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/**************************************************************************
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Wrappers for dlopen, dlsym, dlclose.
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****************************************************************************/
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void *sys_dlopen(const char *name, int flags)
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{
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#if defined(HAVE_DLOPEN)
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return dlopen(name, flags);
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#else
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return NULL;
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#endif
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}
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void *sys_dlsym(void *handle, const char *symbol)
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{
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#if defined(HAVE_DLSYM)
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return dlsym(handle, symbol);
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#else
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return NULL;
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#endif
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}
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const char *sys_dlerror(void)
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{
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#if defined(HAVE_DLERROR)
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return dlerror();
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#else
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return NULL;
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#endif
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}
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const char *sys_inet_ntoa(struct ipv4_addr in)
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{
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struct in_addr in2;
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in2.s_addr = in.addr;
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return inet_ntoa(in2);
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}
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uint32_t sys_inet_addr(const char *s)
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{
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return inet_addr(s);
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}
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struct ipv4_addr sys_inet_makeaddr(int net, int host)
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{
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struct in_addr in;
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struct ipv4_addr in2;
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in = inet_makeaddr(net, host);
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in2.addr = in.s_addr;
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return in2;
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}
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