samba-mirror/source3/lib/util.c

/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Samba utility functions
   Copyright (C) Andrew Tridgell 1992-1998
   
   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"

#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
#ifdef WITH_NISPLUS_HOME
#include <rpcsvc/nis.h>
#else
#include "rpcsvc/ypclnt.h"
#endif
#endif

#ifdef WITH_SSL
#include <ssl.h>
#undef Realloc  /* SSLeay defines this and samba has a function of this name */
extern SSL  *ssl;
extern int  sslFd;
#endif  /* WITH_SSL */

pstring scope = "";

extern int DEBUGLEVEL;

int Protocol = PROTOCOL_COREPLUS;

/* a default finfo structure to ensure all fields are sensible */
file_info def_finfo = {-1,0,0,0,0,0,0,""};

/* the client file descriptor */
extern int Client;

/* this is used by the chaining code */
int chain_size = 0;

int trans_num = 0;

/*
   case handling on filenames 
*/
int case_default = CASE_LOWER;

/* the following control case operations - they are put here so the
   client can link easily */
BOOL case_sensitive;
BOOL case_preserve;
BOOL use_mangled_map = False;
BOOL short_case_preserve;
BOOL case_mangle;

fstring remote_machine="";
fstring local_machine="";
fstring remote_arch="UNKNOWN";
static enum remote_arch_types ra_type = RA_UNKNOWN;
fstring remote_proto="UNKNOWN";
pstring myhostname="";
pstring user_socket_options="";   

pstring sesssetup_user="";
pstring samlogon_user="";

BOOL sam_logon_in_ssb = False;

pstring global_myname = "";
fstring global_myworkgroup = "";
char **my_netbios_names;

static char *filename_dos(char *path,char *buf);



/****************************************************************************
  find a suitable temporary directory. The result should be copied immediately
  as it may be overwritten by a subsequent call
  ****************************************************************************/
char *tmpdir(void)
{
  char *p;
  if ((p = getenv("TMPDIR"))) {
    return p;
  }
  return "/tmp";
}



/****************************************************************************
prompte a dptr (to make it recently used)
****************************************************************************/
static void array_promote(char *array,int elsize,int element)
{
  char *p;
  if (element == 0)
    return;

  p = (char *)malloc(elsize);

  if (!p)
    {
      DEBUG(5,("Ahh! Can't malloc\n"));
      return;
    }
  memcpy(p,array + element * elsize, elsize);
  memmove(array + elsize,array,elsize*element);
  memcpy(array,p,elsize);
  free(p);
}

/****************************************************************************
determine whether we are in the specified group
****************************************************************************/

BOOL in_group(gid_t group, gid_t current_gid, int ngroups, gid_t *groups)
{
	int i;

	if (group == current_gid) return(True);

	for (i=0;i<ngroups;i++)
		if (group == groups[i])
			return(True);

	return(False);
}


/****************************************************************************
gets either a hex number (0xNNN) or decimal integer (NNN).
****************************************************************************/
int get_number(char *tmp)
{
	if (strnequal(tmp, "0x", 2))
	{
		return strtol(tmp, (char**)NULL, 16);
	}
	else
	{
		return strtol(tmp, (char**)NULL, 10);
	}
}

/****************************************************************************
like atoi but gets the value up to the separater character
****************************************************************************/
char *Atoic(char *p, int *n, char *c)
{
	if (!isdigit(*p))
	{
		DEBUG(5, ("Atoic: malformed number\n"));
		return NULL;
	}

	(*n) = get_number(p);

	if (strnequal(p, "0x", 2))
	{
		p += 2;
	}

	while ((*p) && isdigit(*p))
	{
		p++;
	}

	if (strchr(c, *p) == NULL)
	{
		DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
		return NULL;
	}

	return p;
}

/*************************************************************************
 reads a list of numbers
 *************************************************************************/
char *get_numlist(char *p, uint32 **num, int *count)
{
	int val;

	if (num == NULL || count == NULL)
	{
		return NULL;
	}

	(*count) = 0;
	(*num  ) = NULL;

	while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':')
	{
		(*num) = Realloc((*num), ((*count)+1) * sizeof(uint32));
		if ((*num) == NULL)
		{
			return NULL;
		}
		(*num)[(*count)] = val;
		(*count)++;
		p++;
	}

	return p;
}

/*******************************************************************
copy an IP address from one buffer to another
********************************************************************/
void putip(void *dest,void *src)
{
  memcpy(dest,src,4);
}


#define TRUNCATE_NETBIOS_NAME 1

/*******************************************************************
 convert, possibly using a stupid microsoft-ism which has destroyed
 the transport independence of netbios (for CIFS vendors that usually
 use the Win95-type methods, not for NT to NT communication, which uses
 DCE/RPC and therefore full-length unicode strings...) a dns name into
 a netbios name.

 the netbios name (NOT necessarily null-terminated) is truncated to 15
 characters.

 ******************************************************************/
char *dns_to_netbios_name(char *dns_name)
{
	static char netbios_name[16];
	int i;
	StrnCpy(netbios_name, dns_name, 15);
	netbios_name[15] = 0;
	
#ifdef TRUNCATE_NETBIOS_NAME
	/* ok.  this is because of a stupid microsoft-ism.  if the called host
	   name contains a '.', microsoft clients expect you to truncate the
	   netbios name up to and including the '.'  this even applies, by
	   mistake, to workgroup (domain) names, which is _really_ daft.
	 */
	for (i = 15; i >= 0; i--)
	{
		if (netbios_name[i] == '.')
		{
			netbios_name[i] = 0;
			break;
		}
	}
#endif /* TRUNCATE_NETBIOS_NAME */

	return netbios_name;
}


/****************************************************************************
interpret the weird netbios "name". Return the name type
****************************************************************************/
static int name_interpret(char *in,char *out)
{
  int ret;
  int len = (*in++) / 2;

  *out=0;

  if (len > 30 || len<1) return(0);

  while (len--)
    {
      if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
	*out = 0;
	return(0);
      }
      *out = ((in[0]-'A')<<4) + (in[1]-'A');
      in += 2;
      out++;
    }
  *out = 0;
  ret = out[-1];

#ifdef NETBIOS_SCOPE
  /* Handle any scope names */
  while(*in) 
    {
      *out++ = '.'; /* Scope names are separated by periods */
      len = *(unsigned char *)in++;
      StrnCpy(out, in, len);
      out += len;
      *out=0;
      in += len;
    }
#endif
  return(ret);
}

/****************************************************************************
mangle a name into netbios format

  Note:  <Out> must be (33 + strlen(scope) + 2) bytes long, at minimum.
****************************************************************************/
int name_mangle( char *In, char *Out, char name_type )
  {
  int   i;
  int   c;
  int   len;
  char  buf[20];
  char *p = Out;

  /* Safely copy the input string, In, into buf[]. */
  (void)memset( buf, 0, 20 );
  if (strcmp(In,"*") == 0)
    buf[0] = '*';
  else
    (void)slprintf( buf, sizeof(buf) - 1, "%-15.15s%c", In, name_type );

  /* Place the length of the first field into the output buffer. */
  p[0] = 32;
  p++;

  /* Now convert the name to the rfc1001/1002 format. */
  for( i = 0; i < 16; i++ )
    {
    c = toupper( buf[i] );
    p[i*2]     = ( (c >> 4) & 0x000F ) + 'A';
    p[(i*2)+1] = (c & 0x000F) + 'A';
    }
  p += 32;
  p[0] = '\0';

  /* Add the scope string. */
  for( i = 0, len = 0; NULL != scope; i++, len++ )
    {
    switch( scope[i] )
      {
      case '\0':
        p[0]     = len;
        if( len > 0 )
          p[len+1] = 0;
        return( name_len(Out) );
      case '.':
        p[0] = len;
        p   += (len + 1);
        len  = 0;
        break;
      default:
        p[len+1] = scope[i];
        break;
      }
    }

  return( name_len(Out) );
  } /* name_mangle */

/*******************************************************************
  check if a file exists
********************************************************************/
BOOL file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
{
  SMB_STRUCT_STAT st;
  if (!sbuf) sbuf = &st;
  
  if (dos_stat(fname,sbuf) != 0) 
    return(False);

  return(S_ISREG(sbuf->st_mode));
}

/*******************************************************************
check a files mod time
********************************************************************/
time_t file_modtime(char *fname)
{
  SMB_STRUCT_STAT st;
  
  if (dos_stat(fname,&st) != 0) 
    return(0);

  return(st.st_mtime);
}

/*******************************************************************
  check if a directory exists
********************************************************************/
BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
{
  SMB_STRUCT_STAT st2;
  BOOL ret;

  if (!st) st = &st2;

  if (dos_stat(dname,st) != 0) 
    return(False);

  ret = S_ISDIR(st->st_mode);
  if(!ret)
    errno = ENOTDIR;
  return ret;
}

/*******************************************************************
returns the size in bytes of the named file
********************************************************************/
SMB_OFF_T file_size(char *file_name)
{
  SMB_STRUCT_STAT buf;
  buf.st_size = 0;
  dos_stat(file_name,&buf);
  return(buf.st_size);
}

/*******************************************************************
return a string representing an attribute for a file
********************************************************************/
char *attrib_string(uint16 mode)
{
  static fstring attrstr;

  attrstr[0] = 0;

  if (mode & aVOLID) fstrcat(attrstr,"V");
  if (mode & aDIR) fstrcat(attrstr,"D");
  if (mode & aARCH) fstrcat(attrstr,"A");
  if (mode & aHIDDEN) fstrcat(attrstr,"H");
  if (mode & aSYSTEM) fstrcat(attrstr,"S");
  if (mode & aRONLY) fstrcat(attrstr,"R");	  

  return(attrstr);
}



/****************************************************************************
  make a file into unix format
****************************************************************************/
void unix_format(char *fname)
{
  string_replace(fname,'\\','/');
}

/****************************************************************************
  make a file into dos format
****************************************************************************/
void dos_format(char *fname)
{
  string_replace(fname,'/','\\');
}

/*******************************************************************
  show a smb message structure
********************************************************************/
void show_msg(char *buf)
{
	int i;
	int bcc=0;

	if (DEBUGLEVEL < 5) return;

	DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
			smb_len(buf),
			(int)CVAL(buf,smb_com),
			(int)CVAL(buf,smb_rcls),
			(int)CVAL(buf,smb_reh),
			(int)SVAL(buf,smb_err),
			(int)CVAL(buf,smb_flg),
			(int)SVAL(buf,smb_flg2)));
	DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n",
			(int)SVAL(buf,smb_tid),
			(int)SVAL(buf,smb_pid),
			(int)SVAL(buf,smb_uid),
			(int)SVAL(buf,smb_mid),
			(int)CVAL(buf,smb_wct)));

	for (i=0;i<(int)CVAL(buf,smb_wct);i++)
	{
		DEBUG(5,("smb_vwv[%d]=%d (0x%X)\n",i,
			SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
	}

	bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));

	DEBUG(5,("smb_bcc=%d\n",bcc));

	if (DEBUGLEVEL < 10) return;

	if (DEBUGLEVEL < 50)
	{
		bcc = MIN(bcc, 512);
	}

	dump_data(10, smb_buf(buf), bcc);
}
/*******************************************************************
  return the length of an smb packet
********************************************************************/
int smb_len(char *buf)
{
  return( PVAL(buf,3) | (PVAL(buf,2)<<8) | ((PVAL(buf,1)&1)<<16) );
}

/*******************************************************************
  set the length of an smb packet
********************************************************************/
void _smb_setlen(char *buf,int len)
{
  buf[0] = 0;
  buf[1] = (len&0x10000)>>16;
  buf[2] = (len&0xFF00)>>8;
  buf[3] = len&0xFF;
}

/*******************************************************************
  set the length and marker of an smb packet
********************************************************************/
void smb_setlen(char *buf,int len)
{
  _smb_setlen(buf,len);

  CVAL(buf,4) = 0xFF;
  CVAL(buf,5) = 'S';
  CVAL(buf,6) = 'M';
  CVAL(buf,7) = 'B';
}

/*******************************************************************
  setup the word count and byte count for a smb message
********************************************************************/
int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
{
  if (zero)
    bzero(buf + smb_size,num_words*2 + num_bytes);
  CVAL(buf,smb_wct) = num_words;
  SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);  
  smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
  return (smb_size + num_words*2 + num_bytes);
}

/*******************************************************************
return the number of smb words
********************************************************************/
static int smb_numwords(char *buf)
{
  return (CVAL(buf,smb_wct));
}

/*******************************************************************
return the size of the smb_buf region of a message
********************************************************************/
int smb_buflen(char *buf)
{
  return(SVAL(buf,smb_vwv0 + smb_numwords(buf)*2));
}

/*******************************************************************
  return a pointer to the smb_buf data area
********************************************************************/
static int smb_buf_ofs(char *buf)
{
  return (smb_size + CVAL(buf,smb_wct)*2);
}

/*******************************************************************
  return a pointer to the smb_buf data area
********************************************************************/
char *smb_buf(char *buf)
{
  return (buf + smb_buf_ofs(buf));
}

/*******************************************************************
return the SMB offset into an SMB buffer
********************************************************************/
int smb_offset(char *p,char *buf)
{
  return(PTR_DIFF(p,buf+4) + chain_size);
}



/*******************************************************************
reduce a file name, removing .. elements.
********************************************************************/
void dos_clean_name(char *s)
{
  char *p=NULL;

  DEBUG(3,("dos_clean_name [%s]\n",s));

  /* remove any double slashes */
  string_sub(s, "\\\\", "\\");

  while ((p = strstr(s,"\\..\\")) != NULL)
    {
      pstring s1;

      *p = 0;
      pstrcpy(s1,p+3);

      if ((p=strrchr(s,'\\')) != NULL)
	*p = 0;
      else
	*s = 0;
      pstrcat(s,s1);
    }  

  trim_string(s,NULL,"\\..");

  string_sub(s, "\\.\\", "\\");
}

/*******************************************************************
reduce a file name, removing .. elements. 
********************************************************************/
void unix_clean_name(char *s)
{
  char *p=NULL;

  DEBUG(3,("unix_clean_name [%s]\n",s));

  /* remove any double slashes */
  string_sub(s, "//","/");

  /* Remove leading ./ characters */
  if(strncmp(s, "./", 2) == 0) {
    trim_string(s, "./", NULL);
    if(*s == 0)
      pstrcpy(s,"./");
  }

  while ((p = strstr(s,"/../")) != NULL)
    {
      pstring s1;

      *p = 0;
      pstrcpy(s1,p+3);

      if ((p=strrchr(s,'/')) != NULL)
	*p = 0;
      else
	*s = 0;
      pstrcat(s,s1);
    }  

  trim_string(s,NULL,"/..");
}


/*******************************************************************
a wrapper for the normal chdir() function
********************************************************************/
int ChDir(char *path)
{
  int res;
  static pstring LastDir="";

  if (strcsequal(path,".")) return(0);

  if (*path == '/' && strcsequal(LastDir,path)) return(0);
  DEBUG(3,("chdir to %s\n",path));
  res = dos_chdir(path);
  if (!res)
    pstrcpy(LastDir,path);
  return(res);
}

/* number of list structures for a caching GetWd function. */
#define MAX_GETWDCACHE (50)

struct
{
  SMB_DEV_T dev; /* These *must* be compatible with the types returned in a stat() call. */
  SMB_INO_T inode; /* These *must* be compatible with the types returned in a stat() call. */
  char *text; /* The pathname in DOS format. */
  BOOL valid;
} ino_list[MAX_GETWDCACHE];

BOOL use_getwd_cache=True;

/*******************************************************************
  return the absolute current directory path - given a UNIX pathname.
  Note that this path is returned in DOS format, not UNIX
  format.
********************************************************************/
char *GetWd(char *str)
{
  pstring s;
  static BOOL getwd_cache_init = False;
  SMB_STRUCT_STAT st, st2;
  int i;

  *s = 0;

  if (!use_getwd_cache)
    return(dos_getwd(str));

  /* init the cache */
  if (!getwd_cache_init)
  {
    getwd_cache_init = True;
    for (i=0;i<MAX_GETWDCACHE;i++)
    {
      string_init(&ino_list[i].text,"");
      ino_list[i].valid = False;
    }
  }

  /*  Get the inode of the current directory, if this doesn't work we're
      in trouble :-) */

  if (dos_stat(".",&st) == -1) 
  {
    DEBUG(0,("Very strange, couldn't stat \".\"\n"));
    return(dos_getwd(str));
  }


  for (i=0; i<MAX_GETWDCACHE; i++)
    if (ino_list[i].valid)
    {

      /*  If we have found an entry with a matching inode and dev number
          then find the inode number for the directory in the cached string.
          If this agrees with that returned by the stat for the current
          directory then all is o.k. (but make sure it is a directory all
          the same...) */
      
      if (st.st_ino == ino_list[i].inode &&
          st.st_dev == ino_list[i].dev)
      {
        if (dos_stat(ino_list[i].text,&st2) == 0)
        {
          if (st.st_ino == st2.st_ino &&
              st.st_dev == st2.st_dev &&
              (st2.st_mode & S_IFMT) == S_IFDIR)
          {
            pstrcpy (str, ino_list[i].text);

            /* promote it for future use */
            array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);
            return (str);
          }
          else
          {
            /*  If the inode is different then something's changed, 
                scrub the entry and start from scratch. */
            ino_list[i].valid = False;
          }
        }
      }
    }


  /*  We don't have the information to hand so rely on traditional methods.
      The very slow getcwd, which spawns a process on some systems, or the
      not quite so bad getwd. */

  if (!dos_getwd(s))
  {
    DEBUG(0,("Getwd failed, errno %s\n",strerror(errno)));
    return (NULL);
  }

  pstrcpy(str,s);

  DEBUG(5,("GetWd %s, inode %d, dev %x\n",s,(int)st.st_ino,(int)st.st_dev));

  /* add it to the cache */
  i = MAX_GETWDCACHE - 1;
  string_set(&ino_list[i].text,s);
  ino_list[i].dev = st.st_dev;
  ino_list[i].inode = st.st_ino;
  ino_list[i].valid = True;

  /* put it at the top of the list */
  array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);

  return (str);
}



/*******************************************************************
reduce a file name, removing .. elements and checking that 
it is below dir in the heirachy. This uses GetWd() and so must be run
on the system that has the referenced file system.

widelinks are allowed if widelinks is true
********************************************************************/
BOOL reduce_name(char *s,char *dir,BOOL widelinks)
{
#ifndef REDUCE_PATHS
  return True;
#else
  pstring dir2;
  pstring wd;
  pstring base_name;
  pstring newname;
  char *p=NULL;
  BOOL relative = (*s != '/');

  *dir2 = *wd = *base_name = *newname = 0;

  if (widelinks)
    {
      unix_clean_name(s);
      /* can't have a leading .. */
      if (strncmp(s,"..",2) == 0 && (s[2]==0 || s[2]=='/'))
	{
	  DEBUG(3,("Illegal file name? (%s)\n",s));
	  return(False);
	}

      if (strlen(s) == 0)
        pstrcpy(s,"./");

      return(True);
    }
  
  DEBUG(3,("reduce_name [%s] [%s]\n",s,dir));

  /* remove any double slashes */
  string_sub(s,"//","/");

  pstrcpy(base_name,s);
  p = strrchr(base_name,'/');

  if (!p)
    return(True);

  if (!GetWd(wd))
    {
      DEBUG(0,("couldn't getwd for %s %s\n",s,dir));
      return(False);
    }

  if (ChDir(dir) != 0)
    {
      DEBUG(0,("couldn't chdir to %s\n",dir));
      return(False);
    }

  if (!GetWd(dir2))
    {
      DEBUG(0,("couldn't getwd for %s\n",dir));
      ChDir(wd);
      return(False);
    }


    if (p && (p != base_name))
      {
	*p = 0;
	if (strcmp(p+1,".")==0)
	  p[1]=0;
	if (strcmp(p+1,"..")==0)
	  *p = '/';
      }

  if (ChDir(base_name) != 0)
    {
      ChDir(wd);
      DEBUG(3,("couldn't chdir for %s %s basename=%s\n",s,dir,base_name));
      return(False);
    }

  if (!GetWd(newname))
    {
      ChDir(wd);
      DEBUG(2,("couldn't get wd for %s %s\n",s,dir2));
      return(False);
    }

  if (p && (p != base_name))
    {
      pstrcat(newname,"/");
      pstrcat(newname,p+1);
    }

  {
    int l = strlen(dir2);    
    if (dir2[l-1] == '/')
      l--;

    if (strncmp(newname,dir2,l) != 0)
      {
	ChDir(wd);
	DEBUG(2,("Bad access attempt? s=%s dir=%s newname=%s l=%d\n",s,dir2,newname,l));
	return(False);
      }

    if (relative)
      {
	if (newname[l] == '/')
	  pstrcpy(s,newname + l + 1);
	else
	  pstrcpy(s,newname+l);
      }
    else
      pstrcpy(s,newname);
  }

  ChDir(wd);

  if (strlen(s) == 0)
    pstrcpy(s,"./");

  DEBUG(3,("reduced to %s\n",s));
  return(True);
#endif
}

/****************************************************************************
expand some *s 
****************************************************************************/
static void expand_one(char *Mask,int len)
{
  char *p1;
  while ((p1 = strchr(Mask,'*')) != NULL)
    {
      int lfill = (len+1) - strlen(Mask);
      int l1= (p1 - Mask);
      pstring tmp;
      pstrcpy(tmp,Mask);  
      memset(tmp+l1,'?',lfill);
      pstrcpy(tmp + l1 + lfill,Mask + l1 + 1);	
      pstrcpy(Mask,tmp);      
    }
}

/****************************************************************************
parse out a directory name from a path name. Assumes dos style filenames.
****************************************************************************/
static void dirname_dos(char *path,char *buf)
{
	split_at_last_component(path, buf, '\\', NULL);
}


/****************************************************************************
expand a wildcard expression, replacing *s with ?s
****************************************************************************/
void expand_mask(char *Mask,BOOL doext)
{
  pstring mbeg,mext;
  pstring dirpart;
  pstring filepart;
  BOOL hasdot = False;
  char *p1;
  BOOL absolute = (*Mask == '\\');

  *mbeg = *mext = *dirpart = *filepart = 0;

  /* parse the directory and filename */
  if (strchr(Mask,'\\'))
    dirname_dos(Mask,dirpart);

  filename_dos(Mask,filepart);

  pstrcpy(mbeg,filepart);
  if ((p1 = strchr(mbeg,'.')) != NULL)
    {
      hasdot = True;
      *p1 = 0;
      p1++;
      pstrcpy(mext,p1);
    }
  else
    {
      pstrcpy(mext,"");
      if (strlen(mbeg) > 8)
	{
	  pstrcpy(mext,mbeg + 8);
	  mbeg[8] = 0;
	}
    }

  if (*mbeg == 0)
    pstrcpy(mbeg,"????????");
  if ((*mext == 0) && doext && !hasdot)
    pstrcpy(mext,"???");

  if (strequal(mbeg,"*") && *mext==0) 
    pstrcpy(mext,"*");

  /* expand *'s */
  expand_one(mbeg,8);
  if (*mext)
    expand_one(mext,3);

  pstrcpy(Mask,dirpart);
  if (*dirpart || absolute) pstrcat(Mask,"\\");
  pstrcat(Mask,mbeg);
  pstrcat(Mask,".");
  pstrcat(Mask,mext);

  DEBUG(6,("Mask expanded to [%s]\n",Mask));
}  



/****************************************************************************
  make a dir struct
****************************************************************************/
void make_dir_struct(char *buf,char *mask,char *fname,SMB_OFF_T size,int mode,time_t date)
{  
  char *p;
  pstring mask2;

  pstrcpy(mask2,mask);

  if ((mode & aDIR) != 0)
    size = 0;

  memset(buf+1,' ',11);
  if ((p = strchr(mask2,'.')) != NULL)
    {
      *p = 0;
      memcpy(buf+1,mask2,MIN(strlen(mask2),8));
      memcpy(buf+9,p+1,MIN(strlen(p+1),3));
      *p = '.';
    }
  else
    memcpy(buf+1,mask2,MIN(strlen(mask2),11));

  bzero(buf+21,DIR_STRUCT_SIZE-21);
  CVAL(buf,21) = mode;
  put_dos_date(buf,22,date);
  SSVAL(buf,26,size & 0xFFFF);
  SSVAL(buf,28,(size >> 16)&0xFFFF);
  StrnCpy(buf+30,fname,12);
  if (!case_sensitive)
    strupper(buf+30);
  DEBUG(8,("put name [%s] into dir struct\n",buf+30));
}


/*******************************************************************
close the low 3 fd's and open dev/null in their place
********************************************************************/
void close_low_fds(void)
{
  int fd;
  int i;
  close(0); close(1); close(2);
  /* try and use up these file descriptors, so silly
     library routines writing to stdout etc won't cause havoc */
  for (i=0;i<3;i++) {
    fd = open("/dev/null",O_RDWR,0);
    if (fd < 0) fd = open("/dev/null",O_WRONLY,0);
    if (fd < 0) {
      DEBUG(0,("Can't open /dev/null\n"));
      return;
    }
    if (fd != i) {
      DEBUG(0,("Didn't get file descriptor %d\n",i));
      return;
    }
  }
}

/****************************************************************************
Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
else
if SYSV use O_NDELAY
if BSD use FNDELAY
****************************************************************************/
int set_blocking(int fd, BOOL set)
{
  int val;
#ifdef O_NONBLOCK
#define FLAG_TO_SET O_NONBLOCK
#else
#ifdef SYSV
#define FLAG_TO_SET O_NDELAY
#else /* BSD */
#define FLAG_TO_SET FNDELAY
#endif
#endif

  if((val = fcntl(fd, F_GETFL, 0)) == -1)
	return -1;
  if(set) /* Turn blocking on - ie. clear nonblock flag */
	val &= ~FLAG_TO_SET;
  else
    val |= FLAG_TO_SET;
  return fcntl( fd, F_SETFL, val);
#undef FLAG_TO_SET
}


/*******************************************************************
find the difference in milliseconds between two struct timeval
values
********************************************************************/
int TvalDiff(struct timeval *tvalold,struct timeval *tvalnew)
{
  return((tvalnew->tv_sec - tvalold->tv_sec)*1000 + 
	 ((int)tvalnew->tv_usec - (int)tvalold->tv_usec)/1000);	 
}



/****************************************************************************
transfer some data between two fd's
****************************************************************************/
SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n,char *header,int headlen,int align)
{
  static char *buf=NULL;  
  static int size=0;
  char *buf1,*abuf;
  SMB_OFF_T total = 0;

  DEBUG(4,("transfer_file n=%.0f  (head=%d) called\n",(double)n,headlen));

  if (size == 0) {
    size = lp_readsize();
    size = MAX(size,1024);
  }

  while (!buf && size>0) {
    buf = (char *)Realloc(buf,size+8);
    if (!buf) size /= 2;
  }

  if (!buf) {
    DEBUG(0,("Can't allocate transfer buffer!\n"));
    exit(1);
  }

  abuf = buf + (align%8);

  if (header)
    n += headlen;

  while (n > 0)
  {
    int s = (int)MIN(n,(SMB_OFF_T)size);
    int ret,ret2=0;

    ret = 0;

    if (header && (headlen >= MIN(s,1024))) {
      buf1 = header;
      s = headlen;
      ret = headlen;
      headlen = 0;
      header = NULL;
    } else {
      buf1 = abuf;
    }

    if (header && headlen > 0)
    {
      ret = MIN(headlen,size);
      memcpy(buf1,header,ret);
      headlen -= ret;
      header += ret;
      if (headlen <= 0) header = NULL;
    }

    if (s > ret)
      ret += read(infd,buf1+ret,s-ret);

    if (ret > 0)
    {
      ret2 = (outfd>=0?write_data(outfd,buf1,ret):ret);
      if (ret2 > 0) total += ret2;
      /* if we can't write then dump excess data */
      if (ret2 != ret)
        transfer_file(infd,-1,n-(ret+headlen),NULL,0,0);
    }
    if (ret <= 0 || ret2 != ret)
      return(total);
    n -= ret;
  }
  return(total);
}



/****************************************************************************
find a pointer to a netbios name
****************************************************************************/
static char *name_ptr(char *buf,int ofs)
{
  unsigned char c = *(unsigned char *)(buf+ofs);

  if ((c & 0xC0) == 0xC0)
    {
      uint16 l;
      char p[2];
      memcpy(p,buf+ofs,2);
      p[0] &= ~0xC0;
      l = RSVAL(p,0);
      DEBUG(5,("name ptr to pos %d from %d is %s\n",l,ofs,buf+l));
      return(buf + l);
    }
  else
    return(buf+ofs);
}  

/****************************************************************************
extract a netbios name from a buf
****************************************************************************/
int name_extract(char *buf,int ofs,char *name)
{
  char *p = name_ptr(buf,ofs);
  int d = PTR_DIFF(p,buf+ofs);
  pstrcpy(name,"");
  if (d < -50 || d > 50) return(0);
  return(name_interpret(p,name));
}
  
/****************************************************************************
return the total storage length of a mangled name
****************************************************************************/
int name_len(char *s1)
{
	/* NOTE: this argument _must_ be unsigned */
	unsigned char *s = (unsigned char *)s1;
	int len;

	/* If the two high bits of the byte are set, return 2. */
	if (0xC0 == (*s & 0xC0))
		return(2);

	/* Add up the length bytes. */
	for (len = 1; (*s); s += (*s) + 1) {
		len += *s + 1;
		SMB_ASSERT(len < 80);
	}

	return(len);
} /* name_len */


/*******************************************************************
sleep for a specified number of milliseconds
********************************************************************/
void msleep(int t)
{
  int tdiff=0;
  struct timeval tval,t1,t2;  
  fd_set fds;

  GetTimeOfDay(&t1);
  GetTimeOfDay(&t2);
  
  while (tdiff < t) {
    tval.tv_sec = (t-tdiff)/1000;
    tval.tv_usec = 1000*((t-tdiff)%1000);
 
    FD_ZERO(&fds);
    errno = 0;
    sys_select(0,&fds,&tval);

    GetTimeOfDay(&t2);
    tdiff = TvalDiff(&t1,&t2);
  }
}


/*********************************************************
* Recursive routine that is called by unix_mask_match.
* Does the actual matching. This is the 'original code' 
* used by the unix matcher.
*********************************************************/
static BOOL unix_do_match(char *str, char *regexp, int case_sig)
{
  char *p;

  for( p = regexp; *p && *str; ) {
    switch(*p) {
    case '?':
      str++; p++;
      break;

    case '*':
      /* Look for a character matching 
	 the one after the '*' */
      p++;
      if(!*p)
	return True; /* Automatic match */
      while(*str) {
	while(*str && (case_sig ? (*p != *str) : (toupper(*p)!=toupper(*str))))
	  str++;
	if(unix_do_match(str,p,case_sig))
	  return True;
	if(!*str)
	  return False;
	else
	  str++;
      }
      return False;

    default:
      if(case_sig) {
	if(*str != *p)
	  return False;
      } else {
	if(toupper(*str) != toupper(*p))
	  return False;
      }
      str++, p++;
      break;
    }
  }
  if(!*p && !*str)
    return True;

  if (!*p && str[0] == '.' && str[1] == 0)
    return(True);
  
  if (!*str && *p == '?')
    {
      while (*p == '?') p++;
      return(!*p);
    }

  if(!*str && (*p == '*' && p[1] == '\0'))
    return True;
  return False;
}


/*********************************************************
* Routine to match a given string with a regexp - uses
* simplified regexp that takes * and ? only. Case can be
* significant or not.
* This is the 'original code' used by the unix matcher.
*********************************************************/

static BOOL unix_mask_match(char *str, char *regexp, int case_sig,BOOL trans2)
{
  char *p;
  pstring p1, p2;
  fstring ebase,eext,sbase,sext;

  BOOL matched;

  /* Make local copies of str and regexp */
  StrnCpy(p1,regexp,sizeof(pstring)-1);
  StrnCpy(p2,str,sizeof(pstring)-1);

  if (!strchr(p2,'.')) {
    pstrcat(p2,".");
  }

  /* Remove any *? and ** as they are meaningless */
  for(p = p1; *p; p++)
    while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
      (void)pstrcpy( &p[1], &p[2]);

  if (strequal(p1,"*")) return(True);

  DEBUG(8,("unix_mask_match str=<%s> regexp=<%s>, case_sig = %d\n", p2, p1, case_sig));

  if (trans2) {
    fstrcpy(ebase,p1);
    fstrcpy(sbase,p2);
  } else {
    if ((p=strrchr(p1,'.'))) {
      *p = 0;
      fstrcpy(ebase,p1);
      fstrcpy(eext,p+1);
    } else {
      fstrcpy(ebase,p1);
      eext[0] = 0;
    }

  if (!strequal(p2,".") && !strequal(p2,"..") && (p=strrchr(p2,'.'))) {
    *p = 0;
    fstrcpy(sbase,p2);
    fstrcpy(sext,p+1);
  } else {
    fstrcpy(sbase,p2);
    fstrcpy(sext,"");
  }
  }

  matched = unix_do_match(sbase,ebase,case_sig) && 
    (trans2 || unix_do_match(sext,eext,case_sig));

  DEBUG(8,("unix_mask_match returning %d\n", matched));

  return matched;
}

/*********************************************************
* Recursive routine that is called by mask_match.
* Does the actual matching. Returns True if matched,
* False if failed. This is the 'new' NT style matcher.
*********************************************************/

BOOL do_match(char *str, char *regexp, int case_sig)
{
  char *p;

  for( p = regexp; *p && *str; ) {
    switch(*p) {
    case '?':
      str++; p++;
      break;

    case '*':
      /* Look for a character matching 
         the one after the '*' */
      p++;
      if(!*p)
        return True; /* Automatic match */
      while(*str) {
        while(*str && (case_sig ? (*p != *str) : (toupper(*p)!=toupper(*str))))
          str++;
        /* Now eat all characters that match, as
           we want the *last* character to match. */
        while(*str && (case_sig ? (*p == *str) : (toupper(*p)==toupper(*str))))
          str++;
        str--; /* We've eaten the match char after the '*' */
        if(do_match(str,p,case_sig)) {
          return True;
        }
        if(!*str) {
          return False;
        } else {
          str++;
        }
      }
      return False;

    default:
      if(case_sig) {
        if(*str != *p) {
          return False;
        }
      } else {
        if(toupper(*str) != toupper(*p)) {
          return False;
        }
      }
      str++, p++;
      break;
    }
  }

  if(!*p && !*str)
    return True;

  if (!*p && str[0] == '.' && str[1] == 0) {
    return(True);
  }
  
  if (!*str && *p == '?') {
    while (*p == '?')
      p++;
    return(!*p);
  }

  if(!*str && (*p == '*' && p[1] == '\0')) {
    return True;
  }
 
  return False;
}


/*********************************************************
* Routine to match a given string with a regexp - uses
* simplified regexp that takes * and ? only. Case can be
* significant or not.
* The 8.3 handling was rewritten by Ums Harald <Harald.Ums@pro-sieben.de>
* This is the new 'NT style' matcher.
*********************************************************/

BOOL mask_match(char *str, char *regexp, int case_sig,BOOL trans2)
{
  char *p;
  pstring t_pattern, t_filename, te_pattern, te_filename;
  fstring ebase,eext,sbase,sext;

  BOOL matched = False;

  /* Make local copies of str and regexp */
  pstrcpy(t_pattern,regexp);
  pstrcpy(t_filename,str);

#if 0
  /* 
   * Not sure if this is a good idea. JRA.
   */
  if(trans2 && is_8_3(t_pattern,False) && is_8_3(t_filename,False))
    trans2 = False;
#endif

#if 0
  if (!strchr(t_filename,'.')) {
    pstrcat(t_filename,".");
  }
#endif

  /* Remove any *? and ** as they are meaningless */
  string_sub(t_pattern, "*?", "*");
  string_sub(t_pattern, "**", "*");

  if (strequal(t_pattern,"*"))
    return(True);

  DEBUG(8,("mask_match str=<%s> regexp=<%s>, case_sig = %d\n", t_filename, t_pattern, case_sig));

  if(trans2) {
    /*
     * Match each component of the regexp, split up by '.'
     * characters.
     */
    char *fp, *rp, *cp2, *cp1;
    BOOL last_wcard_was_star = False;
    int num_path_components, num_regexp_components;

    pstrcpy(te_pattern,t_pattern);
    pstrcpy(te_filename,t_filename);
    /*
     * Remove multiple "*." patterns.
     */
    string_sub(te_pattern, "*.*.", "*.");
    num_regexp_components = count_chars(te_pattern, '.');
    num_path_components = count_chars(te_filename, '.');

    /* 
     * Check for special 'hack' case of "DIR a*z". - needs to match a.b.c...z
     */
    if(num_regexp_components == 0)
      matched = do_match( te_filename, te_pattern, case_sig);
    else {
      for( cp1 = te_pattern, cp2 = te_filename; cp1;) {
        fp = strchr(cp2, '.');
        if(fp)
          *fp = '\0';
        rp = strchr(cp1, '.');
        if(rp)
          *rp = '\0';

        if(cp1[strlen(cp1)-1] == '*')
          last_wcard_was_star = True;
        else
          last_wcard_was_star = False;

        if(!do_match(cp2, cp1, case_sig))
          break;

        cp1 = rp ? rp + 1 : NULL;
        cp2 = fp ? fp + 1 : "";

        if(last_wcard_was_star || ((cp1 != NULL) && (*cp1 == '*'))) {
          /* Eat the extra path components. */
          int i;

          for(i = 0; i < num_path_components - num_regexp_components; i++) {
            fp = strchr(cp2, '.');
            if(fp)
              *fp = '\0';

            if((cp1 != NULL) && do_match( cp2, cp1, case_sig)) {
              cp2 = fp ? fp + 1 : "";
              break;
            }
            cp2 = fp ? fp + 1 : "";
          }
          num_path_components -= i;
        }
      } 
      if(cp1 == NULL && ((*cp2 == '\0') || last_wcard_was_star))
        matched = True;
    }
  } else {

    /* -------------------------------------------------
     * Behaviour of Win95
     * for 8.3 filenames and 8.3 Wildcards
     * -------------------------------------------------
     */
    if (strequal (t_filename, ".")) {
      /*
       *  Patterns:  *.*  *. ?. ?  are valid
       *
       */
      if(strequal(t_pattern, "*.*") || strequal(t_pattern, "*.") ||
         strequal(t_pattern, "?.") || strequal(t_pattern, "?"))
        matched = True;
    } else if (strequal (t_filename, "..")) {
      /*
       *  Patterns:  *.*  *. ?. ? *.? are valid
       *
       */
      if(strequal(t_pattern, "*.*") || strequal(t_pattern, "*.") ||
         strequal(t_pattern, "?.") || strequal(t_pattern, "?") ||
         strequal(t_pattern, "*.?") || strequal(t_pattern, "?.*"))
        matched = True;
    } else {

      if ((p = strrchr (t_pattern, '.'))) {
        /*
         * Wildcard has a suffix.
         */
        *p = 0;
        fstrcpy (ebase, t_pattern);
        if (p[1]) {
          fstrcpy (eext, p + 1);
        } else {
          /* pattern ends in DOT: treat as if there is no DOT */
          *eext = 0;
          if (strequal (ebase, "*"))
            return (True);
        }
      } else {
        /*
         * No suffix for wildcard.
         */
        fstrcpy (ebase, t_pattern);
        eext[0] = 0;
      }

      p = strrchr (t_filename, '.');
      if (p && (p[1] == 0)	) {
        /*
         * Filename has an extension of '.' only.
         */
        *p = 0; /* nuke dot at end of string */
        p = 0;  /* and treat it as if there is no extension */
      }

      if (p) {
        /*
         * Filename has an extension.
         */
        *p = 0;
        fstrcpy (sbase, t_filename);
        fstrcpy (sext, p + 1);
        if (*eext) {
          matched = do_match(sbase, ebase, case_sig)
                    && do_match(sext, eext, case_sig);
        } else {
          /* pattern has no extension */
          /* Really: match complete filename with pattern ??? means exactly 3 chars */
          matched = do_match(str, ebase, case_sig);
        }
      } else {
        /* 
         * Filename has no extension.
         */
        fstrcpy (sbase, t_filename);
        fstrcpy (sext, "");
        if (*eext) {
          /* pattern has extension */
          matched = do_match(sbase, ebase, case_sig)
                    && do_match(sext, eext, case_sig);
        } else {
          matched = do_match(sbase, ebase, case_sig);
#ifdef EMULATE_WEIRD_W95_MATCHING
          /*
           * Even Microsoft has some problems
           * Behaviour Win95 -> local disk 
           * is different from Win95 -> smb drive from Nt 4.0
           * This branch would reflect the Win95 local disk behaviour
           */
          if (!matched) {
            /* a? matches aa and a in w95 */
            fstrcat (sbase, ".");
            matched = do_match(sbase, ebase, case_sig);
          }
#endif
        }
      }
    }
  }

  DEBUG(8,("mask_match returning %d\n", matched));

  return matched;
}

/****************************************************************************
become a daemon, discarding the controlling terminal
****************************************************************************/
void become_daemon(void)
{
	if (fork()) {
		_exit(0);
	}

  /* detach from the terminal */
#ifdef HAVE_SETSID
	setsid();
#elif defined(TIOCNOTTY)
	{
		int i = open("/dev/tty", O_RDWR);
		if (i != -1) {
			ioctl(i, (int) TIOCNOTTY, (char *)0);      
			close(i);
		}
	}
#endif /* HAVE_SETSID */

	/* Close fd's 0,1,2. Needed if started by rsh */
	close_low_fds();
}


/****************************************************************************
put up a yes/no prompt
****************************************************************************/
BOOL yesno(char *p)
{
  pstring ans;
  printf("%s",p);

  if (!fgets(ans,sizeof(ans)-1,stdin))
    return(False);

  if (*ans == 'y' || *ans == 'Y')
    return(True);

  return(False);
}



/****************************************************************************
set the length of a file from a filedescriptor.
Returns 0 on success, -1 on failure.
****************************************************************************/
int set_filelen(int fd, SMB_OFF_T len)
{
/* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
   extend a file with ftruncate. Provide alternate implementation
   for this */

#ifdef HAVE_FTRUNCATE_EXTEND
  return sys_ftruncate(fd, len);
#else
  SMB_STRUCT_STAT st;
  char c = 0;
  SMB_OFF_T currpos = sys_lseek(fd, (SMB_OFF_T)0, SEEK_CUR);

  if(currpos == -1)
    return -1;
  /* Do an fstat to see if the file is longer than
     the requested size (call ftruncate),
     or shorter, in which case seek to len - 1 and write 1
     byte of zero */
  if(sys_fstat(fd, &st)<0)
    return -1;

#ifdef S_ISFIFO
  if (S_ISFIFO(st.st_mode)) return 0;
#endif

  if(st.st_size == len)
    return 0;
  if(st.st_size > len)
    return sys_ftruncate(fd, len);

  if(sys_lseek(fd, len-1, SEEK_SET) != len -1)
    return -1;
  if(write(fd, &c, 1)!=1)
    return -1;
  /* Seek to where we were */
  if(sys_lseek(fd, currpos, SEEK_SET) != currpos)
    return -1;
  return 0;
#endif
}


#ifdef HPUX
/****************************************************************************
this is a version of setbuffer() for those machines that only have setvbuf
****************************************************************************/
 void setbuffer(FILE *f,char *buf,int bufsize)
{
  setvbuf(f,buf,_IOFBF,bufsize);
}
#endif


/****************************************************************************
parse out a filename from a path name. Assumes dos style filenames.
****************************************************************************/
static char *filename_dos(char *path,char *buf)
{
  char *p = strrchr(path,'\\');

  if (!p)
    pstrcpy(buf,path);
  else
    pstrcpy(buf,p+1);

  return(buf);
}



/****************************************************************************
expand a pointer to be a particular size
****************************************************************************/
void *Realloc(void *p,size_t size)
{
  void *ret=NULL;

  if (size == 0) {
    if (p) free(p);
    DEBUG(5,("Realloc asked for 0 bytes\n"));
    return NULL;
  }

  if (!p)
    ret = (void *)malloc(size);
  else
    ret = (void *)realloc(p,size);

#ifdef MEM_MAN
  {
	extern FILE *dbf;
	smb_mem_write_info(ret, dbf);
  }
#endif

  if (!ret)
    DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",size));

  return(ret);
}


/****************************************************************************
get my own name and IP
****************************************************************************/
BOOL get_myname(char *my_name,struct in_addr *ip)
{
  struct hostent *hp;
  pstring hostname;

  *hostname = 0;

  /* get my host name */
  if (gethostname(hostname, MAXHOSTNAMELEN) == -1) 
    {
      DEBUG(0,("gethostname failed\n"));
      return False;
    } 

  /* get host info */
  if ((hp = Get_Hostbyname(hostname)) == 0) 
    {
      DEBUG(0,( "Get_Hostbyname: Unknown host %s\n",hostname));
      return False;
    }

  if (my_name)
    {
      /* split off any parts after an initial . */
      char *p = strchr(hostname,'.');
      if (p) *p = 0;

      fstrcpy(my_name,hostname);
    }

  if (ip)
    putip((char *)ip,(char *)hp->h_addr);

  return(True);
}


/****************************************************************************
true if two IP addresses are equal
****************************************************************************/
BOOL ip_equal(struct in_addr ip1,struct in_addr ip2)
{
  uint32 a1,a2;
  a1 = ntohl(ip1.s_addr);
  a2 = ntohl(ip2.s_addr);
  return(a1 == a2);
}


/****************************************************************************
interpret a protocol description string, with a default
****************************************************************************/
int interpret_protocol(char *str,int def)
{
  if (strequal(str,"NT1"))
    return(PROTOCOL_NT1);
  if (strequal(str,"LANMAN2"))
    return(PROTOCOL_LANMAN2);
  if (strequal(str,"LANMAN1"))
    return(PROTOCOL_LANMAN1);
  if (strequal(str,"CORE"))
    return(PROTOCOL_CORE);
  if (strequal(str,"COREPLUS"))
    return(PROTOCOL_COREPLUS);
  if (strequal(str,"CORE+"))
    return(PROTOCOL_COREPLUS);
  
  DEBUG(0,("Unrecognised protocol level %s\n",str));
  
  return(def);
}


/****************************************************************************
interpret an internet address or name into an IP address in 4 byte form
****************************************************************************/
uint32 interpret_addr(char *str)
{
  struct hostent *hp;
  uint32 res;
  int i;
  BOOL pure_address = True;

  if (strcmp(str,"0.0.0.0") == 0) return(0);
  if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF);

  for (i=0; pure_address && str[i]; i++)
    if (!(isdigit((int)str[i]) || str[i] == '.')) 
      pure_address = False;

  /* if it's in the form of an IP address then get the lib to interpret it */
  if (pure_address) {
    res = inet_addr(str);
  } else {
    /* otherwise assume it's a network name of some sort and use 
       Get_Hostbyname */
    if ((hp = Get_Hostbyname(str)) == 0) {
      DEBUG(3,("Get_Hostbyname: Unknown host. %s\n",str));
      return 0;
    }
    if(hp->h_addr == NULL) {
      DEBUG(3,("Get_Hostbyname: host address is invalid for host %s\n",str));
      return 0;
    }
    putip((char *)&res,(char *)hp->h_addr);
  }

  if (res == (uint32)-1) return(0);

  return(res);
}

/*******************************************************************
  a convenient addition to interpret_addr()
  ******************************************************************/
struct in_addr *interpret_addr2(char *str)
{
  static struct in_addr ret;
  uint32 a = interpret_addr(str);
  ret.s_addr = a;
  return(&ret);
}

/*******************************************************************
  check if an IP is the 0.0.0.0
  ******************************************************************/
BOOL zero_ip(struct in_addr ip)
{
  uint32 a;
  putip((char *)&a,(char *)&ip);
  return(a == 0);
}


/*******************************************************************
 matchname - determine if host name matches IP address 
 ******************************************************************/
BOOL matchname(char *remotehost,struct in_addr  addr)
{
  struct hostent *hp;
  int     i;
  
  if ((hp = Get_Hostbyname(remotehost)) == 0) {
    DEBUG(0,("Get_Hostbyname(%s): lookup failure", remotehost));
    return False;
  } 

  /*
   * Make sure that gethostbyname() returns the "correct" host name.
   * Unfortunately, gethostbyname("localhost") sometimes yields
   * "localhost.domain". Since the latter host name comes from the
   * local DNS, we just have to trust it (all bets are off if the local
   * DNS is perverted). We always check the address list, though.
   */
  
  if (strcasecmp(remotehost, hp->h_name)
      && strcasecmp(remotehost, "localhost")) {
    DEBUG(0,("host name/name mismatch: %s != %s",
	     remotehost, hp->h_name));
    return False;
  }
	
  /* Look up the host address in the address list we just got. */
  for (i = 0; hp->h_addr_list[i]; i++) {
    if (memcmp(hp->h_addr_list[i], (caddr_t) & addr, sizeof(addr)) == 0)
      return True;
  }

  /*
   * The host name does not map to the original host address. Perhaps
   * someone has compromised a name server. More likely someone botched
   * it, but that could be dangerous, too.
   */
  
  DEBUG(0,("host name/address mismatch: %s != %s",
	   inet_ntoa(addr), hp->h_name));
  return False;
}


#if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
/******************************************************************
 Remove any mount options such as -rsize=2048,wsize=2048 etc.
 Based on a fix from <Thomas.Hepper@icem.de>.
*******************************************************************/

static void strip_mount_options( pstring *str)
{
  if (**str == '-')
  { 
    char *p = *str;
    while(*p && !isspace(*p))
      p++;
    while(*p && isspace(*p))
      p++;
    if(*p) {
      pstring tmp_str;

      pstrcpy(tmp_str, p);
      pstrcpy(*str, tmp_str);
    }
  }
}

/*******************************************************************
 Patch from jkf@soton.ac.uk
 Split Luke's automount_server into YP lookup and string splitter
 so can easily implement automount_path(). 
 As we may end up doing both, cache the last YP result. 
*******************************************************************/

#ifdef WITH_NISPLUS_HOME
static char *automount_lookup(char *user_name)
{
  static fstring last_key = "";
  static pstring last_value = "";
 
  char *nis_map = (char *)lp_nis_home_map_name();
 
  char nis_domain[NIS_MAXNAMELEN + 1];
  char buffer[NIS_MAXATTRVAL + 1];
  nis_result *result;
  nis_object *object;
  entry_obj  *entry;
 
  strncpy(nis_domain, (char *)nis_local_directory(), NIS_MAXNAMELEN);
  nis_domain[NIS_MAXNAMELEN] = '\0';
 
  DEBUG(5, ("NIS+ Domain: %s\n", nis_domain));
 
  if (strcmp(user_name, last_key))
  {
    slprintf(buffer, sizeof(buffer)-1, "[%s=%s]%s.%s", "key", user_name, nis_map, nis_domain);
    DEBUG(5, ("NIS+ querystring: %s\n", buffer));
 
    if (result = nis_list(buffer, RETURN_RESULT, NULL, NULL))
    {
       if (result->status != NIS_SUCCESS)
      {
        DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
        fstrcpy(last_key, ""); pstrcpy(last_value, "");
      }
      else
      {
        object = result->objects.objects_val;
        if (object->zo_data.zo_type == ENTRY_OBJ)
        {
           entry = &object->zo_data.objdata_u.en_data;
           DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
           DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
 
           pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
           string_sub(last_value, "&", user_name);
           fstrcpy(last_key, user_name);
        }
      }
    }
    nis_freeresult(result);
  }

  strip_mount_options(&last_value);

  DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
  return last_value;
}
#else /* WITH_NISPLUS_HOME */
static char *automount_lookup(char *user_name)
{
  static fstring last_key = "";
  static pstring last_value = "";

  int nis_error;        /* returned by yp all functions */
  char *nis_result;     /* yp_match inits this */
  int nis_result_len;  /* and set this */
  char *nis_domain;     /* yp_get_default_domain inits this */
  char *nis_map = (char *)lp_nis_home_map_name();

  if ((nis_error = yp_get_default_domain(&nis_domain)) != 0)
  {
    DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
    return last_value;
  }

  DEBUG(5, ("NIS Domain: %s\n", nis_domain));

  if (!strcmp(user_name, last_key))
  {
    nis_result = last_value;
    nis_result_len = strlen(last_value);
    nis_error = 0;
  }
  else
  {
    if ((nis_error = yp_match(nis_domain, nis_map,
                              user_name, strlen(user_name),
                              &nis_result, &nis_result_len)) != 0)
    {
      DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n", 
               yperr_string(nis_error), user_name, nis_map));
    }
    if (!nis_error && nis_result_len >= sizeof(pstring))
    {
      nis_result_len = sizeof(pstring)-1;
    }
    fstrcpy(last_key, user_name);
    strncpy(last_value, nis_result, nis_result_len);
    last_value[nis_result_len] = '\0';
  }

  strip_mount_options(&last_value);

  DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
  return last_value;
}
#endif /* WITH_NISPLUS_HOME */
#endif

/*******************************************************************
 Patch from jkf@soton.ac.uk
 This is Luke's original function with the NIS lookup code
 moved out to a separate function.
*******************************************************************/
static char *automount_server(char *user_name)
{
	static pstring server_name;

	/* use the local machine name as the default */
	/* this will be the default if WITH_AUTOMOUNT is not used or fails */
	pstrcpy(server_name, local_machine);

#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))

	if (lp_nis_home_map())
	{
	        int home_server_len;
		char *automount_value = automount_lookup(user_name);
		home_server_len = strcspn(automount_value,":");
		DEBUG(5, ("NIS lookup succeeded.  Home server length: %d\n",home_server_len));
		if (home_server_len > sizeof(pstring))
		{
			home_server_len = sizeof(pstring);
		}
		strncpy(server_name, automount_value, home_server_len);
                server_name[home_server_len] = '\0';
	}
#endif

	DEBUG(4,("Home server: %s\n", server_name));

	return server_name;
}

/*******************************************************************
 Patch from jkf@soton.ac.uk
 Added this to implement %p (NIS auto-map version of %H)
*******************************************************************/
static char *automount_path(char *user_name)
{
	static pstring server_path;

	/* use the passwd entry as the default */
	/* this will be the default if WITH_AUTOMOUNT is not used or fails */
	/* pstrcpy() copes with get_home_dir() returning NULL */
	pstrcpy(server_path, get_home_dir(user_name));

#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))

	if (lp_nis_home_map())
	{
	        char *home_path_start;
		char *automount_value = automount_lookup(user_name);
		home_path_start = strchr(automount_value,':');
		if (home_path_start != NULL)
		{
		  DEBUG(5, ("NIS lookup succeeded.  Home path is: %s\n",
		        home_path_start?(home_path_start+1):""));
		  pstrcpy(server_path, home_path_start+1);
		}
	}
#endif

	DEBUG(4,("Home server path: %s\n", server_path));

	return server_path;
}


/*******************************************************************
sub strings with useful parameters
Rewritten by Stefaan A Eeckels <Stefaan.Eeckels@ecc.lu> and
Paul Rippin <pr3245@nopc.eurostat.cec.be>
********************************************************************/
void standard_sub_basic(char *str)
{
	char *s, *p;
	char pidstr[10];
	struct passwd *pass;
	char *username = sam_logon_in_ssb ? samlogon_user : sesssetup_user;

	for (s = str ; s && *s && (p = strchr(s,'%')); s = p )
	{
		switch (*(p+1))
		{
			case 'G' :
			{
				if ((pass = Get_Pwnam(username,False))!=NULL)
				{
					string_sub(p,"%G",gidtoname(pass->pw_gid));
				}
				else
				{
					p += 2;
				}
				break;
			}
			case 'N' : string_sub(p,"%N", automount_server(username)); break;
			case 'I' : string_sub(p,"%I", client_addr(Client)); break;
			case 'L' : string_sub(p,"%L", local_machine); break;
			case 'M' : string_sub(p,"%M", client_name(Client)); break;
			case 'R' : string_sub(p,"%R", remote_proto); break;
			case 'T' : string_sub(p,"%T", timestring()); break;
			case 'U' : string_sub(p,"%U", username); break;
			case 'a' : string_sub(p,"%a", remote_arch); break;
			case 'd' :
			{
				slprintf(pidstr,sizeof(pidstr) - 1, "%d",(int)getpid());
				string_sub(p,"%d", pidstr);
				break;
			}
			case 'h' : string_sub(p,"%h", myhostname); break;
			case 'm' : string_sub(p,"%m", remote_machine); break;
			case 'v' : string_sub(p,"%v", VERSION); break;
			case '$' : /* Expand environment variables */
			{
				/* Contributed by Branko Cibej <branko.cibej@hermes.si> */
				fstring envname;
				char *envval;
				char *q, *r;
				int copylen;

				if (*(p+2) != '(')
				{
					p+=2;
					break;
				}
				if ((q = strchr(p,')')) == NULL)
				{
					DEBUG(0,("standard_sub_basic: Unterminated environment \
					variable [%s]\n", p));
					p+=2;
					break;
				}

				r = p+3;
				copylen = MIN((q-r),(sizeof(envname)-1));
				strncpy(envname,r,copylen);
				envname[copylen] = '\0';

				if ((envval = getenv(envname)) == NULL)
				{
					DEBUG(0,("standard_sub_basic: Environment variable [%s] not set\n",
					envname));
					p+=2;
					break;
				}

				copylen = MIN((q+1-p),(sizeof(envname)-1));
				strncpy(envname,p,copylen);
				envname[copylen] = '\0';
				string_sub(p,envname,envval);
				break;
			}
			case '\0': p++; break; /* don't run off end if last character is % */
			default  : p+=2; break;
		}
	}
	return;
}


/****************************************************************************
do some standard substitutions in a string
****************************************************************************/
void standard_sub(connection_struct *conn,char *str)
{
	char *p, *s, *home;

	for (s=str; (p=strchr(s, '%'));s=p) {
		switch (*(p+1)) {
		case 'H': 
			if ((home = get_home_dir(conn->user))) {
				string_sub(p,"%H",home);
			} else {
				p += 2;
			}
			break;
			
		case 'P': 
			string_sub(p,"%P",conn->connectpath); 
			break;
			
		case 'S': 
			string_sub(p,"%S",
				   lp_servicename(SNUM(conn))); 
			break;
			
		case 'g': 
			string_sub(p,"%g",
				   gidtoname(conn->gid)); 
			break;
		case 'u': 
			string_sub(p,"%u",conn->user); 
			break;
			
			/* Patch from jkf@soton.ac.uk Left the %N (NIS
			 * server name) in standard_sub_basic as it is
			 * a feature for logon servers, hence uses the
			 * username.  The %p (NIS server path) code is
			 * here as it is used instead of the default
			 * "path =" string in [homes] and so needs the
			 * service name, not the username.  */
		case 'p': 
			string_sub(p,"%p",
				   automount_path(lp_servicename(SNUM(conn)))); 
			break;
		case '\0': 
			p++; 
			break; /* don't run off the end of the string 
				*/
			
		default: p+=2; 
			break;
		}
	}
	
	standard_sub_basic(str);
}



/*******************************************************************
are two IPs on the same subnet?
********************************************************************/
BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
{
  uint32 net1,net2,nmask;

  nmask = ntohl(mask.s_addr);
  net1  = ntohl(ip1.s_addr);
  net2  = ntohl(ip2.s_addr);
            
  return((net1 & nmask) == (net2 & nmask));
}


/****************************************************************************
a wrapper for gethostbyname() that tries with all lower and all upper case 
if the initial name fails
****************************************************************************/
struct hostent *Get_Hostbyname(const char *name)
{
  char *name2 = strdup(name);
  struct hostent *ret;

  if (!name2)
    {
      DEBUG(0,("Memory allocation error in Get_Hostbyname! panic\n"));
      exit(0);
    }

   
  /* 
   * This next test is redundent and causes some systems (with
   * broken isalnum() calls) problems.
   * JRA.
   */

#if 0
  if (!isalnum(*name2))
    {
      free(name2);
      return(NULL);
    }
#endif /* 0 */

  ret = sys_gethostbyname(name2);
  if (ret != NULL)
    {
      free(name2);
      return(ret);
    }

  /* try with all lowercase */
  strlower(name2);
  ret = sys_gethostbyname(name2);
  if (ret != NULL)
    {
      free(name2);
      return(ret);
    }

  /* try with all uppercase */
  strupper(name2);
  ret = sys_gethostbyname(name2);
  if (ret != NULL)
    {
      free(name2);
      return(ret);
    }
  
  /* nothing works :-( */
  free(name2);
  return(NULL);
}


/****************************************************************************
check if a process exists. Does this work on all unixes?
****************************************************************************/

BOOL process_exists(int pid)
{
	return(kill(pid,0) == 0 || errno != ESRCH);
}


/*******************************************************************
turn a uid into a user name
********************************************************************/
char *uidtoname(uid_t uid)
{
  static char name[40];
  struct passwd *pass = getpwuid(uid);
  if (pass) return(pass->pw_name);
  slprintf(name, sizeof(name) - 1, "%d",(int)uid);
  return(name);
}


/*******************************************************************
turn a gid into a group name
********************************************************************/

char *gidtoname(gid_t gid)
{
	static char name[40];
	struct group *grp = getgrgid(gid);
	if (grp) return(grp->gr_name);
	slprintf(name,sizeof(name) - 1, "%d",(int)gid);
	return(name);
}

/*******************************************************************
turn a user name into a uid
********************************************************************/
uid_t nametouid(const char *name)
{
	struct passwd *pass = getpwnam(name);
	if (pass) return(pass->pw_uid);
	return (uid_t)-1;
}

/*******************************************************************
something really nasty happened - panic!
********************************************************************/
void smb_panic(char *why)
{
	char *cmd = lp_panic_action();
	if (cmd && *cmd) {
		system(cmd);
	}
	DEBUG(0,("PANIC: %s\n", why));
	dbgflush();
	abort();
}


/*******************************************************************
a readdir wrapper which just returns the file name
********************************************************************/
char *readdirname(void *p)
{
	struct dirent *ptr;
	char *dname;

	if (!p) return(NULL);
  
	ptr = (struct dirent *)readdir(p);
	if (!ptr) return(NULL);

	dname = ptr->d_name;

#ifdef NEXT2
	if (telldir(p) < 0) return(NULL);
#endif

#ifdef HAVE_BROKEN_READDIR
	/* using /usr/ucb/cc is BAD */
	dname = dname - 2;
#endif

	{
		static pstring buf;
		memcpy(buf, dname, NAMLEN(ptr)+1);
		unix_to_dos(buf, True);
		dname = buf;
	}

	return(dname);
}

/*******************************************************************
 Utility function used to decide if the last component 
 of a path matches a (possibly wildcarded) entry in a namelist.
********************************************************************/

BOOL is_in_path(char *name, name_compare_entry *namelist)
{
  pstring last_component;
  char *p;

  DEBUG(8, ("is_in_path: %s\n", name));

  /* if we have no list it's obviously not in the path */
  if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) 
  {
    DEBUG(8,("is_in_path: no name list.\n"));
    return False;
  }

  /* Get the last component of the unix name. */
  p = strrchr(name, '/');
  strncpy(last_component, p ? ++p : name, sizeof(last_component)-1);
  last_component[sizeof(last_component)-1] = '\0'; 

  for(; namelist->name != NULL; namelist++)
  {
    if(namelist->is_wild)
    {
      /* 
       * Look for a wildcard match. Use the old
       * 'unix style' mask match, rather than the
       * new NT one.
       */
      if (unix_mask_match(last_component, namelist->name, case_sensitive, False))
      {
         DEBUG(8,("is_in_path: mask match succeeded\n"));
         return True;
      }
    }
    else
    {
      if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
       (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0)))
        {
         DEBUG(8,("is_in_path: match succeeded\n"));
         return True;
        }
    }
  }
  DEBUG(8,("is_in_path: match not found\n"));
 
  return False;
}

/*******************************************************************
 Strip a '/' separated list into an array of 
 name_compare_enties structures suitable for 
 passing to is_in_path(). We do this for
 speed so we can pre-parse all the names in the list 
 and don't do it for each call to is_in_path().
 namelist is modified here and is assumed to be 
 a copy owned by the caller.
 We also check if the entry contains a wildcard to
 remove a potentially expensive call to mask_match
 if possible.
********************************************************************/
 
void set_namearray(name_compare_entry **ppname_array, char *namelist)
{
  char *name_end;
  char *nameptr = namelist;
  int num_entries = 0;
  int i;

  (*ppname_array) = NULL;

  if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0'))) 
    return;

  /* We need to make two passes over the string. The
     first to count the number of elements, the second
     to split it.
   */
  while(*nameptr) 
    {
      if ( *nameptr == '/' ) 
        {
          /* cope with multiple (useless) /s) */
          nameptr++;
          continue;
        }
      /* find the next / */
      name_end = strchr(nameptr, '/');

      /* oops - the last check for a / didn't find one. */
      if (name_end == NULL)
        break;

      /* next segment please */
      nameptr = name_end + 1;
      num_entries++;
    }

  if(num_entries == 0)
    return;

  if(( (*ppname_array) = (name_compare_entry *)malloc( 
           (num_entries + 1) * sizeof(name_compare_entry))) == NULL)
        {
    DEBUG(0,("set_namearray: malloc fail\n"));
    return;
        }

  /* Now copy out the names */
  nameptr = namelist;
  i = 0;
  while(*nameptr)
             {
      if ( *nameptr == '/' ) 
      {
          /* cope with multiple (useless) /s) */
          nameptr++;
          continue;
      }
      /* find the next / */
      if ((name_end = strchr(nameptr, '/')) != NULL) 
      {
          *name_end = 0;
         }

      /* oops - the last check for a / didn't find one. */
      if(name_end == NULL) 
        break;

      (*ppname_array)[i].is_wild = ((strchr( nameptr, '?')!=NULL) ||
                                (strchr( nameptr, '*')!=NULL));
      if(((*ppname_array)[i].name = strdup(nameptr)) == NULL)
      {
        DEBUG(0,("set_namearray: malloc fail (1)\n"));
        return;
      }

      /* next segment please */
      nameptr = name_end + 1;
      i++;
    }
  
  (*ppname_array)[i].name = NULL;

  return;
}

/****************************************************************************
routine to free a namearray.
****************************************************************************/

void free_namearray(name_compare_entry *name_array)
{
  if(name_array == 0)
    return;

  if(name_array->name != NULL)
    free(name_array->name);

  free((char *)name_array);
}

/****************************************************************************
routine to do file locking
****************************************************************************/
BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
{
#if HAVE_FCNTL_LOCK
  SMB_STRUCT_FLOCK lock;
  int ret;

  if(lp_ole_locking_compat()) {
    SMB_OFF_T mask = ((SMB_OFF_T)0xC) << (SMB_OFF_T_BITS-4);
    SMB_OFF_T mask2= ((SMB_OFF_T)0x3) << (SMB_OFF_T_BITS-4);

    /* make sure the count is reasonable, we might kill the lockd otherwise */
    count &= ~mask;

    /* the offset is often strange - remove 2 of its bits if either of
       the top two bits are set. Shift the top ones by two bits. This
       still allows OLE2 apps to operate, but should stop lockd from
       dieing */
    if ((offset & mask) != 0)
      offset = (offset & ~mask) | (((offset & mask) >> 2) & mask2);
  } else {
    SMB_OFF_T mask = ((SMB_OFF_T)0x8) << (SMB_OFF_T_BITS-4);
    SMB_OFF_T neg_mask = ~mask;

    /* interpret negative counts as large numbers */
    if (count < 0)
      count &= ~mask;

    /* no negative offsets */
    if(offset < 0)
      offset &= ~mask;

    /* count + offset must be in range */
    while ((offset < 0 || (offset + count < 0)) && mask)
    {
      offset &= ~mask;
      mask = ((mask >> 1) & neg_mask);
    }
  }

  DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));

  lock.l_type = type;
  lock.l_whence = SEEK_SET;
  lock.l_start = offset;
  lock.l_len = count;
  lock.l_pid = 0;

  errno = 0;

  ret = fcntl(fd,op,&lock);
  if (errno == EFBIG)
  {
    if( DEBUGLVL( 0 ))
    {
      dbgtext("fcntl_lock: WARNING: lock request at offset %.0f, length %.0f returned\n", (double)offset,(double)count);
      dbgtext("a 'file too large' error. This can happen when using 64 bit lock offsets\n");
      dbgtext("on 32 bit NFS mounted file systems. Retrying with 32 bit truncated length.\n");
    }
    /* 32 bit NFS file system, retry with smaller offset */
    errno = 0;
    lock.l_len = count & 0xffffffff;
    ret = fcntl(fd,op,&lock);
  }

  if (errno != 0)
    DEBUG(3,("fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));

  /* a lock query */
  if (op == SMB_F_GETLK)
  {
    if ((ret != -1) &&
        (lock.l_type != F_UNLCK) && 
        (lock.l_pid != 0) && 
        (lock.l_pid != getpid()))
    {
      DEBUG(3,("fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
      return(True);
    }

    /* it must be not locked or locked by me */
    return(False);
  }

  /* a lock set or unset */
  if (ret == -1)
  {
    DEBUG(3,("lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
          (double)offset,(double)count,op,type,strerror(errno)));

    /* perhaps it doesn't support this sort of locking?? */
    if (errno == EINVAL)
    {
      DEBUG(3,("locking not supported? returning True\n"));
      return(True);
    }

    return(False);
  }

  /* everything went OK */
  DEBUG(8,("Lock call successful\n"));

  return(True);
#else
  return(False);
#endif
}

/*******************************************************************
is the name specified one of my netbios names
returns true is it is equal, false otherwise
********************************************************************/
BOOL is_myname(char *s)
{
  int n;
  BOOL ret = False;

  for (n=0; my_netbios_names[n]; n++) {
    if (strequal(my_netbios_names[n], s))
      ret=True;
  }
  DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
  return(ret);
}

/*******************************************************************
set the horrid remote_arch string based on an enum.
********************************************************************/
void set_remote_arch(enum remote_arch_types type)
{
  ra_type = type;
  switch( type )
  {
  case RA_WFWG:
    fstrcpy(remote_arch, "WfWg");
    return;
  case RA_OS2:
    fstrcpy(remote_arch, "OS2");
    return;
  case RA_WIN95:
    fstrcpy(remote_arch, "Win95");
    return;
  case RA_WINNT:
    fstrcpy(remote_arch, "WinNT");
    return;
  case RA_SAMBA:
    fstrcpy(remote_arch,"Samba");
    return;
  default:
    ra_type = RA_UNKNOWN;
    fstrcpy(remote_arch, "UNKNOWN");
    break;
  }
}

/*******************************************************************
 Get the remote_arch type.
********************************************************************/
enum remote_arch_types get_remote_arch(void)
{
  return ra_type;
}


/*******************************************************************
align a pointer to a multiple of 2 bytes
********************************************************************/
char *align2(char *q, char *base)
{
	if ((q - base) & 1)
	{
		q++;
	}
	return q;
}

void out_ascii(FILE *f, unsigned char *buf,int len)
{
	int i;
	for (i=0;i<len;i++)
	{
		fprintf(f, "%c", isprint(buf[i])?buf[i]:'.');
	}
}

void out_data(FILE *f,char *buf1,int len, int per_line)
{
	unsigned char *buf = (unsigned char *)buf1;
	int i=0;
	if (len<=0)
	{
		return;
	}

	fprintf(f, "[%03X] ",i);
	for (i=0;i<len;)
	{
		fprintf(f, "%02X ",(int)buf[i]);
		i++;
		if (i%(per_line/2) == 0) fprintf(f, " ");
		if (i%per_line == 0)
		{      
			out_ascii(f,&buf[i-per_line  ],per_line/2); fprintf(f, " ");
			out_ascii(f,&buf[i-per_line/2],per_line/2); fprintf(f, "\n");
			if (i<len) fprintf(f, "[%03X] ",i);
		}
	}
	if ((i%per_line) != 0)
	{
		int n;

		n = per_line - (i%per_line);
		fprintf(f, " ");
		if (n>(per_line/2)) fprintf(f, " ");
		while (n--)
		{
			fprintf(f, "   ");
		}
		n = MIN(per_line/2,i%per_line);
		out_ascii(f,&buf[i-(i%per_line)],n); fprintf(f, " ");
		n = (i%per_line) - n;
		if (n>0) out_ascii(f,&buf[i-n],n); 
		fprintf(f, "\n");    
	}
}

void print_asc(int level, unsigned char *buf,int len)
{
	int i;
	for (i=0;i<len;i++)
		DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
}

void dump_data(int level,char *buf1,int len)
{
  unsigned char *buf = (unsigned char *)buf1;
  int i=0;
  if (len<=0) return;

  DEBUG(level,("[%03X] ",i));
  for (i=0;i<len;) {
    DEBUG(level,("%02X ",(int)buf[i]));
    i++;
    if (i%8 == 0) DEBUG(level,(" "));
    if (i%16 == 0) {      
      print_asc(level,&buf[i-16],8); DEBUG(level,(" "));
      print_asc(level,&buf[i-8],8); DEBUG(level,("\n"));
      if (i<len) DEBUG(level,("[%03X] ",i));
    }
  }
  if (i%16) {
    int n;

    n = 16 - (i%16);
    DEBUG(level,(" "));
    if (n>8) DEBUG(level,(" "));
    while (n--) DEBUG(level,("   "));

    n = MIN(8,i%16);
    print_asc(level,&buf[i-(i%16)],n); DEBUG(level,(" "));
    n = (i%16) - n;
    if (n>0) print_asc(level,&buf[i-n],n); 
    DEBUG(level,("\n"));    
  }
}

char *tab_depth(int depth)
{
	static pstring spaces;
	memset(spaces, ' ', depth * 4);
	spaces[depth * 4] = 0;
	return spaces;
}

/*****************************************************************************
 * Provide a checksum on a string
 *
 *  Input:  s - the null-terminated character string for which the checksum
 *              will be calculated.
 *
 *  Output: The checksum value calculated for s.
 *
 * ****************************************************************************
 */
int str_checksum(const char *s)
{
	int res = 0;
	int c;
	int i=0;
	
	while(*s) {
		c = *s;
		res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
		s++;
		i++;
	}
	return(res);
} /* str_checksum */



/*****************************************************************
zero a memory area then free it. Used to catch bugs faster
*****************************************************************/  
void zero_free(void *p, size_t size)
{
	memset(p, 0, size);
	free(p);
}


/*****************************************************************
set our open file limit to a requested max and return the limit
*****************************************************************/  
int set_maxfiles(int requested_max)
{
#if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
	struct rlimit rlp;
	getrlimit(RLIMIT_NOFILE, &rlp);
	/* Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
	 * account for the extra fd we need 
	 * as well as the log files and standard
	 * handles etc.  */
	rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
	setrlimit(RLIMIT_NOFILE, &rlp);
	getrlimit(RLIMIT_NOFILE, &rlp);
	return rlp.rlim_cur;
#else
	/*
	 * No way to know - just guess...
	 */
	return requested_max;
#endif
}


/*****************************************************************
 splits out the last subkey of a key
 *****************************************************************/  
void reg_get_subkey(char *full_keyname, char *key_name, char *subkey_name)
{
	split_at_last_component(full_keyname, key_name, '\\', subkey_name);
}

/*****************************************************************
 splits out the start of the key (HKLM or HKU) and the rest of the key
 *****************************************************************/  
BOOL reg_split_key(char *full_keyname, uint32 *reg_type, char *key_name)
{
	pstring tmp;

	if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp)))
	{
		return False;
	}

	(*reg_type) = 0;

	DEBUG(10, ("reg_split_key: hive %s\n", tmp));

	if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE"))
	{
		(*reg_type) = HKEY_LOCAL_MACHINE;
	}
	else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS"))
	{
		(*reg_type) = HKEY_USERS;
	}
	else
	{
		DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp));
		return False;
	}
	
	if (next_token(NULL, tmp, "\n\r", sizeof(tmp)))
	{
		fstrcpy(key_name, tmp);
	}
	else
	{
		key_name[0] = 0;
	}

	DEBUG(10, ("reg_split_key: name %s\n", key_name));

	return True;
}

/****************************************************************************
  become the specified uid - permanently !
****************************************************************************/
BOOL become_user_permanently(uid_t uid, gid_t gid)
{
	/* now completely lose our privilages. This is a fairly paranoid
	   way of doing it, but it does work on all systems that I know of */

#ifdef HAVE_SETRESUID
	/*
	 * Firstly ensure all our uids are set to root.
	 */
	setresgid(0,0,0);
	setresuid(0,0,0);

	/*
	 * Now ensure we change all our gids.
	 */
	setresgid(gid,gid,gid);
	
	/*
	 * Now ensure all the uids are the user.
	 */
	setresuid(uid,uid,uid);
#else
	/*
	 * Firstly ensure all our uids are set to root.
	 */
	setuid(0);
	seteuid(0);
	
	/*
	 * Now ensure we change all our gids.
	 */
	setgid(gid);
	setegid(gid);
	
	/*
	 * Now ensure all the uids are the user.
	 */
	setuid(uid);
	seteuid(uid);
#endif
	
	if (getuid() != uid || geteuid() != uid ||
	    getgid() != gid || getegid() != gid) {
		/* We failed to lose our privilages. */
		return False;
	}
	
	return(True);
}