samba-mirror/source/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
#ifdef BROKEN_NISPLUS_INCLUDE_FILES
/*
 * The following lines are needed due to buggy include files
 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
 * an enum in /usr/include/rpcsvc/nis.h.
 */

#if defined(GROUP)
#undef GROUP
#endif

#if defined(GROUP_OBJ)
#undef GROUP_OBJ
#endif

#endif /* BROKEN_NISPLUS_INCLUDE_FILES */

#include <rpcsvc/nis.h>

#else /* !WITH_NISPLUS_HOME */

#include "rpcsvc/ypclnt.h"

#endif /* WITH_NISPLUS_HOME */
#endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */

#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 */

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,""};

/* 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 user_socket_options=DEFAULT_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";
}

/****************************************************************************
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);
}


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

	(*n) = atoi(p);

	while ((*p) && isdigit((int)*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;
}


/*******************************************************************
  check if a file exists - call vfs_file_exist for samba files
********************************************************************/
BOOL file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
{
  SMB_STRUCT_STAT st;
  if (!sbuf) sbuf = &st;
  
  if (sys_stat(fname,sbuf) != 0) 
    return(False);

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

/*******************************************************************
  rename a unix file
********************************************************************/
int file_rename(char *from, char *to)
{
	int rcode = rename (from, to);

	if (errno == EXDEV) 
	{
		/* Rename across filesystems needed. */
		rcode = copy_reg (from, to);        
	}
	return rcode;
}

/*******************************************************************
check a files mod time
********************************************************************/
time_t file_modtime(char *fname)
{
  SMB_STRUCT_STAT st;
  
  if (sys_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 (sys_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 get_file_size(char *file_name)
{
  SMB_STRUCT_STAT buf;
  buf.st_size = 0;
  if(sys_stat(file_name,&buf) != 0)
    return (SMB_OFF_T)-1;
  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);
}

/*******************************************************************
  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);
}

/*******************************************************************
  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)
    memset(buf + smb_size,'\0',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);
}

/*******************************************************************
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 */
  all_string_sub(s, "\\\\", "\\", 0);

  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,"\\..");

  all_string_sub(s, "\\.\\", "\\", 0);
}

/*******************************************************************
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 */
  all_string_sub(s, "//","/", 0);

  /* 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,"/..");
}

/*******************************************************************
reduce a file name, removing .. elements and checking that 
it is below dir in the heirachy. This uses dos_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 */
  all_string_sub(s,"//","/",0);

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

  if (!p)
    return(True);

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

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

  if (!dos_GetWd(dir2))
  {
    DEBUG(0,("couldn't getwd for %s\n",dir));
    dos_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 (dos_ChDir(base_name) != 0)
  {
    dos_ChDir(wd);
    DEBUG(3,("couldn't chdir for %s %s basename=%s\n",s,dir,base_name));
    return(False);
  }

  if (!dos_GetWd(newname))
  {
    dos_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);
  }

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

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

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

  dos_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);      
    }
}

/****************************************************************************
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,'\\'))
    split_at_last_component(Mask,dirpart,'\\',NULL);

  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));

  memset(buf+21,'\0',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 = sys_open("/dev/null",O_RDWR,0);
    if (fd < 0) fd = sys_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
}

/****************************************************************************
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);
}


/*******************************************************************
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.
*********************************************************/

BOOL unix_do_match(char *str, char *regexp, BOOL 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++;

        /*
         * Patch from weidel@multichart.de. In the case of the regexp
         * '*XX*' we want to ensure there are at least 2 'X' characters
         * in the filename after the '*' for a match to be made.
         */

        {
          int matchcount=0;

          /*
           * Eat all the characters that match, but count how many there were.
           */

          while(*str && (case_sig ? (*p == *str) : (toupper(*p)==toupper(*str)))) {
            str++;
            matchcount++;
          }

          /*
           * Now check that if the regexp had n identical characters that
           * matchcount had at least that many matches.
           */

          while (( *(p+1) && (case_sig ? (*(p+1) == *p) : (toupper(*(p+1))==toupper(*p))))) {
            p++;
            matchcount--;
          }
          if ( matchcount <= 0 ) {
            return False;
          }
        }
        str--; /* We've eaten the match char after the '*' */
        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, BOOL case_sig)
{
  char *p;
  pstring p1, p2;
  fstring ebase,sbase;
  BOOL matched;

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

  /* 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));

  fstrcpy(ebase,p1);
  fstrcpy(sbase,p2);

  matched = unix_do_match(sbase,ebase,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.
* The win9x_semantics parameter is needed as Win9x matching
* is *actually different*. In Win9x, trailing '?' characters
* will only match the *exact* number of characters. Under
* DOS and NT they match any number. This makes no
* sense.....
*********************************************************/

static BOOL do_match(char *str, char *regexp, int case_sig, BOOL win9x_semantics)
{
  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++;

        /*
         * Patch from weidel@multichart.de. In the case of the regexp
         * '*XX*' we want to ensure there are at least 2 'X' characters
         * in the filename after the '*' for a match to be made.
         */

        {
          int matchcount=0;

          /*
           * Eat all the characters that match, but count how many there were.
           */

          while(*str && (case_sig ? (*p == *str) : (toupper(*p)==toupper(*str)))) {
            str++;
            matchcount++;
          }

          /*
           * Now check that if the regexp had n identical characters that
           * matchcount had at least that many matches.
           */

          while (( *(p+1) && (case_sig ? (*(p+1) == *p) : (toupper(*(p+1))==toupper(*p))))) {
            p++;
            matchcount--;
          }
          if ( matchcount <= 0 ) {
            return False;
          }
        }
        str--; /* We've eaten the match char after the '*' */
        if(do_match(str,p,case_sig,win9x_semantics)) {
          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 (!win9x_semantics) {
    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, BOOL case_sig, BOOL trans2)
{
  char *p;
  pstring t_pattern, t_filename, te_pattern, te_filename;
  fstring ebase,eext,sbase,sext;
  BOOL matched = False;
  BOOL win9x_semantics = (get_remote_arch() == RA_WIN95) && trans2;

  /* special case - if it is exactly the same then it always matches! */
  if(exact_match(str, regexp, case_sig))
    return True;

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

  if(trans2) {

    /* a special case for 16 bit apps */
    if (strequal(t_pattern,"????????.???"))
      pstrcpy(t_pattern,"*");

#if 0
    /*
     * Handle broken clients that send us old 8.3 format.
     */
    pstring_sub(t_pattern,"????????","*");
    pstring_sub(t_pattern,".???",".*");
#endif
  }

#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 */
  for(p = t_pattern; *p; p++)
    while( *p == '*' && (p[1] == '?' || p[1] == '*'))
      (void)pstrcpy( &p[1], &p[2]);

  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.
     */
    pstring_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, win9x_semantics);
    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[0] && cp1[strlen(cp1)-1] == '*')
          last_wcard_was_star = True;
        else
          last_wcard_was_star = False;

        if(!do_match(cp2, cp1, case_sig, win9x_semantics))
          break;

        /*
         * Ugly ! Special case for Win9x *only*. If filename is XXXX and pattern extension
         * is '*' or all '?' then disallow match.
         */

        if (win9x_semantics) {
          if (*cp2 == '\0' && str_is_all(cp1, '?'))
            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, win9x_semantics)) {
              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, "?.") || 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, "*.?") || 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, False)
                    && do_match(sext, eext, case_sig, False);
        } else {
          /* pattern has no extension */
          /* Really: match complete filename with pattern ??? means exactly 3 chars */
          matched = do_match(str, ebase, case_sig, False);
        }
      } else {
        /* 
         * Filename has no extension.
         */
        fstrcpy (sbase, t_filename);
        fstrcpy (sext, "");
        if (*eext) {
          /* pattern has extension */
          matched = do_match(sbase, ebase, case_sig, False)
                    && do_match(sext, eext, case_sig, False);

        } else {
          matched = do_match(sbase, ebase, case_sig, False);
#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, False);
          }
#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 = sys_open("/dev/tty", O_RDWR, 0);
		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.
****************************************************************************/

/* tpot vfs need to recode this function */

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);

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

  return(ret);
}


/****************************************************************************
free memory, checks for NULL
****************************************************************************/
void safe_free(void *p)
{
	if (p != NULL)
	{
		free(p);
	}
}


/****************************************************************************
get my own name and IP
****************************************************************************/
BOOL get_myname(char *my_name)
{
	pstring hostname;

	*hostname = 0;

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

	/* Ensure null termination. */
	hostname[sizeof(hostname)-1] = '\0';

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

/****************************************************************************
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);
}

/****************************************************************************
 Return true if a string could be a pure IP address.
****************************************************************************/

BOOL is_ipaddress(const char *str)
{
  BOOL pure_address = True;
  int i;
  
  for (i=0; pure_address && str[i]; i++)
    if (!(isdigit((int)str[i]) || str[i] == '.'))
      pure_address = False;

  /* Check that a pure number is not misinterpreted as an IP */
  pure_address = pure_address && (strchr(str, '.') != NULL);

  return pure_address;
}

/****************************************************************************
interpret an internet address or name into an IP address in 4 byte form
****************************************************************************/

uint32 interpret_addr(char *str)
{
  struct hostent *hp;
  uint32 res;

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

  /* if it's in the form of an IP address then get the lib to interpret it */
  if (is_ipaddress(str)) {
    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);
}


#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);
           pstring_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_user_home_dir() returning NULL */
	pstrcpy(server_path, get_user_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;
}

/*******************************************************************
 Given a pointer to a %$(NAME) expand it as an environment variable.
 Return the number of characters by which the pointer should be advanced.
 Based on code by Branko Cibej <branko.cibej@hermes.si>
 When this is called p points at the '%' character.
********************************************************************/

static size_t expand_env_var(char *p, int len)
{
	fstring envname;
	char *envval;
	char *q, *r;
	int copylen;

	if (p[1] != '$')
		return 1;

	if (p[2] != '(')
		return 2;

	/*
	 * Look for the terminating ')'.
	 */

	if ((q = strchr(p,')')) == NULL) {
		DEBUG(0,("expand_env_var: Unterminated environment variable [%s]\n", p));
		return 2;
	}

	/*
	 * Extract the name from within the %$(NAME) string.
	 */

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

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

	/*
	 * Copy the full %$(NAME) into envname so it
	 * can be replaced.
	 */

	copylen = MIN((q+1-p),(sizeof(envname)-1));
	strncpy(envname,p,copylen);
	envname[copylen] = '\0';
	string_sub(p,envname,envval,len);
	return 0; /* Allow the environment contents to be parsed. */
}

/*******************************************************************
 Substitute 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 )
	{
		int l = sizeof(pstring) - (int)(p-str);

		if (l < 0) {
			DEBUG(0,("ERROR: string overflow by %d in standard_sub_basic(%.50s)\n", 
				 -l, str));
			
			return;
		}

		switch (*(p+1))
		{
			case 'G' :
			{
				if ((pass = Get_Pwnam(username,False))!=NULL) {
					string_sub(p,"%G",gidtoname(pass->pw_gid),l);
				} else {
					p += 2;
				}
				break;
			}
			case 'N' : string_sub(p,"%N", automount_server(username),l); break;
			case 'I' : string_sub(p,"%I", client_addr(),l); break;
			case 'L' : string_sub(p,"%L", local_machine,l); break;
			case 'M' : string_sub(p,"%M", client_name(),l); break;
			case 'R' : string_sub(p,"%R", remote_proto,l); break;
			case 'T' : string_sub(p,"%T", timestring(False),l); break;
			case 'U' : string_sub(p,"%U", username,l); break;
			case 'a' : string_sub(p,"%a", remote_arch,l); break;
			case 'd' :
			{
				slprintf(pidstr,sizeof(pidstr) - 1, "%d",(int)getpid());
				string_sub(p,"%d", pidstr,l);
				break;
			}
			case 'h' : string_sub(p,"%h", myhostname(),l); break;
			case 'm' : string_sub(p,"%m", remote_machine,l); break;
			case 'v' : string_sub(p,"%v", VERSION,l); break;
			case '$' : p += expand_env_var(p,l); break; /* Expand environment variables */
			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_advanced(int snum, char *user, char *connectpath, gid_t gid, char *str)
{
	char *p, *s, *home;

	for (s=str; (p=strchr(s, '%'));s=p) {
		int l = sizeof(pstring) - (int)(p-str);

		switch (*(p+1)) {
		case 'H':
			if ((home = get_user_home_dir(user))) {
				string_sub(p,"%H",home, l);
			} else {
				p += 2;
			}
			break;
			
		case 'P': 
			string_sub(p,"%P", connectpath, l); 
			break;
			
		case 'S': 
			string_sub(p,"%S", lp_servicename(snum), l); 
			break;
			
		case 'g': 
			string_sub(p,"%g", gidtoname(gid), l); 
			break;
		case 'u': 
			string_sub(p,"%u", user, l); 
			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)), l); 
			break;
		case '\0': 
			p++; 
			break; /* don't run off the end of the string */
			
		default: p+=2; 
			break;
		}
	}
	
	standard_sub_basic(str);
}

/****************************************************************************
 Do some standard substitutions in a string.
****************************************************************************/
void standard_sub(connection_struct *conn, char *str)
{
	if (conn==NULL)
		standard_sub_advanced(-1, "", "", -1, str);
	else
		standard_sub_advanced(SNUM(conn), conn->user, conn->connectpath, conn->gid, str);
}

/****************************************************************************
like standard_sub but by snum
****************************************************************************/
void standard_sub_snum(int snum, char *str)
{
	standard_sub_advanced(snum, "", "", -1, 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(pid_t 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 = sys_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;
	char *p;
	uid_t u;

	u = strtol(name, &p, 0);
	if (p != name) return u;

	pass = sys_getpwnam(name);
	if (pass) return(pass->pw_uid);
	return (uid_t)-1;
}

/*******************************************************************
turn a group name into a gid
********************************************************************/
gid_t nametogid(const char *name)
{
	struct group *grp;
	char *p;
	gid_t g;

	g = strtol(name, &p, 0);
	if (p != name) return g;

	grp = getgrnam(name);
	if (grp) return(grp->gr_gid);
	return (gid_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(DIR *p)
{
	SMB_STRUCT_DIRENT *ptr;
	char *dname;

	if (!p) return(NULL);
  
	ptr = (SMB_STRUCT_DIRENT *)sys_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);
		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))
      {
         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);
}

/****************************************************************************
 Pathetically try and map a 64 bit lock offset into 31 bits. I hate Windows :-).
****************************************************************************/

uint32 map_lock_offset(uint32 high, uint32 low)
{
  unsigned int i;
  uint32 mask = 0;
  uint32 highcopy = high;

  /*
   * Try and find out how many significant bits there are in high.
   */

  for(i = 0; highcopy; i++)
    highcopy >>= 1;

  /*
   * We use 31 bits not 32 here as POSIX
   * lock offsets may not be negative.
   */

  mask = (~0) << (31 - i);

  if(low & mask)
    return 0; /* Fail. */

  high <<= (31 - i);

  return (high|low);
}

/****************************************************************************
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 defined(LARGE_SMB_OFF_T)
  /*
   * In the 64 bit locking case we store the original
   * values in case we have to map to a 32 bit lock on
   * a filesystem that doesn't support 64 bit locks.
   */
  SMB_OFF_T orig_offset = offset;
  SMB_OFF_T orig_count = count;
#endif /* LARGE_SMB_OFF_T */

  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 & 0x7fffffff;
    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)
    {

#if defined(LARGE_SMB_OFF_T)
      {
        /*
         * Ok - if we get here then we have a 64 bit lock request
         * that has returned EINVAL. Try and map to 31 bits for offset
         * and length and try again. This may happen if a filesystem
         * doesn't support 64 bit offsets (efs/ufs) although the underlying
         * OS does.
         */
        uint32 off_low = (orig_offset & 0xFFFFFFFF);
        uint32 off_high = ((orig_offset >> 32) & 0xFFFFFFFF);

        lock.l_len = (orig_count & 0x7FFFFFFF);
        lock.l_start = (SMB_OFF_T)map_lock_offset(off_high, off_low);
        ret = fcntl(fd,op,&lock);
        if (ret == -1)
        {
          if (errno == EINVAL)
          {
            DEBUG(3,("locking not supported? returning True\n"));
            return(True);
          }
          return False;
        }
        DEBUG(3,("64 -> 32 bit modified lock call successful\n"));
        return True;
      }
#else /* LARGE_SMB_OFF_T */
      DEBUG(3,("locking not supported? returning True\n"));
      return(True);
#endif /* LARGE_SMB_OFF_T */
    }

    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_WIN2K:
    fstrcpy(remote_arch, "Win2K");
    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;
}


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;
	int saved_current_limit;

	if(getrlimit(RLIMIT_NOFILE, &rlp)) {
		DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
			strerror(errno) ));
		/* just guess... */
		return requested_max;
	}

	/* 
     * 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. Save the limit we want to set in case
	 * we are running on an OS that doesn't support this limit (AIX)
	 * which always returns RLIM_INFINITY for rlp.rlim_max.
	 */

	saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);

	if(setrlimit(RLIMIT_NOFILE, &rlp)) {
		DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n", 
			(int)rlp.rlim_cur, strerror(errno) ));
		/* just guess... */
		return saved_current_limit;
	}

	if(getrlimit(RLIMIT_NOFILE, &rlp)) {
		DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
			strerror(errno) ));
		/* just guess... */
		return saved_current_limit;
    }

#if defined(RLIM_INFINITY)
	if(rlp.rlim_cur == RLIM_INFINITY)
		return saved_current_limit;
#endif

    if((int)rlp.rlim_cur > saved_current_limit)
		return saved_current_limit;

	return rlp.rlim_cur;
#else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
	/*
	 * No way to know - just guess...
	 */
	return requested_max;
#endif
}

/*****************************************************************
 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;
}


/*****************************************************************
like mktemp() but make sure that no % characters are used
% characters are bad for us because of the macro subs
 *****************************************************************/  
char *smbd_mktemp(char *template)
{
	char *p = mktemp(template);
	char *p2;
	SMB_STRUCT_STAT st;

	if (!p) return NULL;

	while ((p2=strchr(p,'%'))) {
		p2[0] = 'A';
		while (sys_stat(p,&st) == 0 && p2[0] < 'Z') {
			/* damn, it exists */
			p2[0]++;
		}
		if (p2[0] == 'Z') {
			/* oh well ... better return something */
			p2[0] = '%';
			return p;
		}
	}

	return p;
}


/*****************************************************************
like strdup but for memory
 *****************************************************************/  
void *memdup(void *p, size_t size)
{
	void *p2;
	p2 = malloc(size);
	if (!p2) return NULL;
	memcpy(p2, p, size);
	return p2;
}

/*****************************************************************
get local hostname and cache result
 *****************************************************************/  
char *myhostname(void)
{
	static pstring ret;
	if (ret[0] == 0) {
		get_myname(ret);
	}
	return ret;
}


/*****************************************************************
a useful function for returning a path in the Samba lock directory
 *****************************************************************/  
char *lock_path(char *name)
{
	static pstring fname;

	pstrcpy(fname,lp_lockdir());
	trim_string(fname,"","/");
	
	if (!directory_exist(fname,NULL)) {
		mkdir(fname,0755);
	}
	
	pstrcat(fname,"/");
	pstrcat(fname,name);

	return fname;
}

/*******************************************************************
 Given a filename - get its directory name
 NB: Returned in static storage.  Caveats:
 o  Not safe in thread environment.
 o  Caller must not free.
 o  If caller wishes to preserve, they should copy.
********************************************************************/

char *parent_dirname(const char *path)
{
	static pstring dirpath;
	char *p;

	if (!path)
		return(NULL);

	pstrcpy(dirpath, path);
	p = strrchr(dirpath, '/');  /* Find final '/', if any */
	if (!p) {
		pstrcpy(dirpath, ".");    /* No final "/", so dir is "." */
	} else {
		if (p == dirpath)
			++p;    /* For root "/", leave "/" in place */
		*p = '\0';
	}
	return dirpath;
}