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/*
Unix SMB/Netbios implementation.
Version 1.9.
Samba system utilities
Copyright (C) Andrew Tridgell 1992-1997
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
extern int DEBUGLEVEL;
/*
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.
*/
/*******************************************************************
this replaces the normal select() system call
return if some data has arrived on one of the file descriptors
return -1 means error
********************************************************************/
#ifdef NO_SELECT
static int pollfd(int fd)
{
int r=0;
#ifdef HAS_RDCHK
r = rdchk(fd);
#elif defined(TCRDCHK)
(void)ioctl(fd, TCRDCHK, &r);
#else
(void)ioctl(fd, FIONREAD, &r);
#endif
return(r);
}
int sys_select(fd_set *fds,struct timeval *tval)
{
fd_set fds2;
int counter=0;
int found=0;
FD_ZERO(&fds2);
while (1)
{
int i;
for (i=0;i<255;i++) {
if (FD_ISSET(i,fds) && pollfd(i)>0) {
found++;
FD_SET(i,&fds2);
}
}
if (found) {
memcpy((void *)fds,(void *)&fds2,sizeof(fds2));
return(found);
}
if (tval && tval->tv_sec < counter) return(0);
sleep(1);
counter++;
}
}
#else
int sys_select(fd_set *fds,struct timeval *tval)
{
struct timeval t2;
int selrtn;
do {
if (tval) memcpy((void *)&t2,(void *)tval,sizeof(t2));
errno = 0;
selrtn = select(255,SELECT_CAST fds,NULL,NULL,tval?&t2:NULL);
} while (selrtn<0 && errno == EINTR);
return(selrtn);
}
#endif
/*******************************************************************
just a unlink wrapper
********************************************************************/
int sys_unlink(char *fname)
{
return(unlink(dos_to_unix(fname,False)));
}
/*******************************************************************
a simple open() wrapper
********************************************************************/
int sys_open(char *fname,int flags,int mode)
{
return(open(dos_to_unix(fname,False),flags,mode));
}
/*******************************************************************
a simple opendir() wrapper
********************************************************************/
DIR *sys_opendir(char *dname)
{
return(opendir(dos_to_unix(dname,False)));
}
/*******************************************************************
and a stat() wrapper
********************************************************************/
int sys_stat(char *fname,struct stat *sbuf)
{
return(stat(dos_to_unix(fname,False),sbuf));
}
/*******************************************************************
The wait() calls vary between systems
********************************************************************/
int sys_waitpid(pid_t pid, SYS_WAIT_TYPE *status,int options)
{
#ifdef USE_WAITPID
return waitpid(pid,status,options);
#else /* USE_WAITPID */
return wait4(pid, status, options, NULL);
#endif /* USE_WAITPID */
}
/*******************************************************************
don't forget lstat()
********************************************************************/
int sys_lstat(char *fname,struct stat *sbuf)
{
return(lstat(dos_to_unix(fname,False),sbuf));
}
/*******************************************************************
mkdir() gets a wrapper
********************************************************************/
int sys_mkdir(char *dname,int mode)
{
return(mkdir(dos_to_unix(dname,False),mode));
}
/*******************************************************************
do does rmdir()
********************************************************************/
int sys_rmdir(char *dname)
{
return(rmdir(dos_to_unix(dname,False)));
}
/*******************************************************************
I almost forgot chdir()
********************************************************************/
int sys_chdir(char *dname)
{
return(chdir(dos_to_unix(dname,False)));
}
/*******************************************************************
now for utime()
********************************************************************/
int sys_utime(char *fname,struct utimbuf *times)
{
/* if the modtime is 0 or -1 then ignore the call and
return success */
if (times->modtime == (time_t)0 || times->modtime == (time_t)-1)
return 0;
/* if the access time is 0 or -1 then set it to the modtime */
if (times->actime == (time_t)0 || times->actime == (time_t)-1)
times->actime = times->modtime;
#ifdef NEXT3_0
{
struct timeval tv[2];
tv[0].tv_sec = times->actime; tv[0].tv_usec = 0;
tv[1].tv_sec = times->modtime; tv[1].tv_usec = 0;
return utimes(dos_to_unix(fname,False),tv);
}
#else
return(utime(dos_to_unix(fname,False),times));
#endif
}
/*********************************************************
for rename across filesystems Patch from Warren Birnbaum
<warrenb@hpcvscdp.cv.hp.com>
**********************************************************/
static int
copy_reg (const char *source, const char *dest)
{
struct stat source_stats;
int ifd;
int full_write();
int safe_read();
int ofd;
char *buf;
int len; /* Number of bytes read into `buf'. */
lstat (source, &source_stats);
if (!S_ISREG (source_stats.st_mode))
{
return 1;
}
if (unlink (dest) && errno != ENOENT)
{
return 1;
}
if((ifd = open (source, O_RDONLY, 0)) < 0)
{
return 1;
}
if((ofd = open (dest, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0 )
{
close (ifd);
return 1;
}
if((buf = malloc( COPYBUF_SIZE )) == NULL)
{
close (ifd);
close (ofd);
unlink (dest);
return 1;
}
while ((len = read(ifd, buf, COPYBUF_SIZE)) > 0)
{
if (write_data(ofd, buf, len) < 0)
{
close (ifd);
close (ofd);
unlink (dest);
free(buf);
return 1;
}
}
free(buf);
if (len < 0)
{
close (ifd);
close (ofd);
unlink (dest);
return 1;
}
if (close (ifd) < 0)
{
close (ofd);
return 1;
}
if (close (ofd) < 0)
{
return 1;
}
/* chown turns off set[ug]id bits for non-root,
so do the chmod last. */
/* Try to copy the old file's modtime and access time. */
#ifdef NEXT3_0
{
struct timeval tv[2];
tv[0].tv_sec = source_stats.st_atime; tv[0].tv_usec = 0;
tv[1].tv_sec = source_stats.st_mtime; tv[1].tv_usec = 0;
if (utimes(dest, tv))
return 1;
}
#else
{
struct utimbuf tv;
tv.actime = source_stats.st_atime;
tv.modtime = source_stats.st_mtime;
if (utime (dest, &tv))
{
return 1;
}
}
#endif
/* Try to preserve ownership. For non-root it might fail, but that's ok.
But root probably wants to know, e.g. if NFS disallows it. */
if (chown (dest, source_stats.st_uid, source_stats.st_gid)
&& (errno != EPERM))
{
return 1;
}
if (chmod (dest, source_stats.st_mode & 07777))
{
return 1;
}
unlink (source);
return 0;
}
/*******************************************************************
for rename()
********************************************************************/
int sys_rename(char *from, char *to)
{
int rcode;
pstring zfrom, zto;
pstrcpy (zfrom, dos_to_unix (from, False));
pstrcpy (zto, dos_to_unix (to, False));
rcode = rename (zfrom, zto);
if (errno == EXDEV)
{
/* Rename across filesystems needed. */
rcode = copy_reg (zfrom, zto);
}
return rcode;
}
/*******************************************************************
for chmod
********************************************************************/
int sys_chmod(char *fname,int mode)
{
return(chmod(dos_to_unix(fname,False),mode));
}
/*******************************************************************
for getwd
********************************************************************/
char *sys_getwd(char *s)
{
char *wd;
#ifdef USE_GETCWD
wd = (char *) getcwd (s, sizeof (pstring));
#else
wd = (char *) getwd (s);
#endif
if (wd)
unix_to_dos (wd, True);
return wd;
}
/*******************************************************************
chown isn't used much but OS/2 doesn't have it
********************************************************************/
int sys_chown(char *fname,int uid,int gid)
{
#ifdef NO_CHOWN
DEBUG(1,("Warning - chown(%s,%d,%d) not done\n",fname,uid,gid));
#else
return(chown(fname,uid,gid));
#endif
}
/*******************************************************************
os/2 also doesn't have chroot
********************************************************************/
int sys_chroot(char *dname)
{
#ifdef NO_CHROOT
DEBUG(1,("Warning - chroot(%s) not done\n",dname));
#else
return(chroot(dname));
#endif
}
/**************************************************************************
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.
****************************************************************************/
struct hostent *sys_gethostbyname(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));
sprintf(query, "%s%s", name, domain);
return(gethostbyname(query));
#else /* REDUCE_ROOT_DNS_LOOKUPS */
return(gethostbyname(name));
#endif /* REDUCE_ROOT_DNS_LOOKUPS */
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.