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       ldap_init_getfilter,  ldap_init_getfilter_buf,  ldap_getfilter_free,  ldap_getfirstfilter,
       ldap_getnextfilter, ldap_build_filter - LDAP filter generating routines

       #include <ldap.h>

       #define LDAP_FILT_MAXSIZ 1024

       typedef struct ldap_filt_info {
	       char		       *lfi_filter;
	       char		       *lfi_desc;
	       int		       lfi_scope;
	       int		       lfi_isexact;
	       struct ldap_filt_info   *lfi_next;
       } LDAPFiltInfo;

       typedef struct ldap_filt_list {
	   char 		       *lfl_tag;
	   char 		       *lfl_pattern;
	   char 		       *lfl_delims;
	   LDAPFiltInfo 	       *lfl_ilist;
	   struct ldap_filt_list       *lfl_next;
       } LDAPFiltList;

       typedef struct ldap_filt_desc {
	       LDAPFiltList	       *lfd_filtlist;
	       LDAPFiltInfo	       *lfd_curfip;
	       LDAPFiltInfo	       lfd_retfi;
	       char		       lfd_filter[ LDAP_FILT_MAXSIZ ];
	       char		       *lfd_curval;
	       char		       *lfd_curvalcopy;
	       char		       **lfd_curvalwords;
	       char		       *lfd_filtprefix;
	       char		       *lfd_filtsuffix;
       } LDAPFiltDesc;

       LDAPFiltDesc *ldap_init_getfilter( file ) char *file;

       LDAPFiltDesc *ldap_init_getfilter_buf( buf, buflen )
       char *buf;
       long buflen;

       ldap_getfilter_free( lfdp )
       LDAPFiltDesc *lfdp;

       LDAPFiltInfo *ldap_getfirstfilter(lfdp, tagpat, value)
       LDAPFiltDesc *lfdp;
       char *tagpat;
       char *value;

       LDAPFiltInfo *ldap_getnextfilter(lfdp)
       LDAPFiltDesc *lfdp;

       void ldap_setfilteraffixes(lfdp, prefix, suffix)
       LDAPFiltDesc *lfdp;
       char *prefix;
       char *suffix;

       void ldap_build_filter( buf, buflen, pattern, prefix, suffix,
	    attr, value, valwords )
       char *buf;
       unsigned long buflen;
       char *pattern;
       char *prefix;
       char *suffix;
       char *attr;
       char *value;
       char **valwords;

       These  routines	are  used  to  generate  filters  to  be  used	 in   ldap_search(3)   or
       ldap_search_s(3).   Either  ldap_init_getfilter	or ldap_init_getfilter_buf must be called
       prior to calling any of the other routines except ldap_build_filter.

       ldap_init_getfilter() takes a file name as its only argument.  The contents  of	the  file
       must  be  a valid LDAP filter configuration file (see ldapfilter.conf(5)).  If the file is
       successfully read, a pointer to an LDAPFiltDesc is returned.  This  is  an  opaque  object
       that is passed in subsequent get filter calls.

       ldap_init_getfilter_buf() reads from buf (whose length is buflen) the LDAP filter configu-
       ration information.  buf must point to the contents of a valid LDAP  filter  configuration
       file  (see  ldapfilter.conf(5)).   If the filter configuration information is successfully
       read, a pointer to an LDAPFiltDesc is returned.	This is an opaque object that  is  passed
       in subsequent get filter calls.

       ldap_getfilter_free()  deallocates the memory consumed by ldap_init_getfilter.  Once it is
       called, the LDAPFiltDesc is no longer valid and cannot be used again.

       ldap_getfirstfilter() retrieves the first filter that is appropriate for value.	Only fil-
       ter sets that have tags that match the regular expession tagpat are considered.	ldap_get-
       firstfilter returns a pointer to an LDAPFiltInfo structure, which contains a  filter  with
       value  inserted	as  appropriate  in  lfi_filter,  a  text  match description in lfi_desc,
       lfi_scope set to indicate the search scope, and lfi_isexact set to indicate  the  type  of
       filter.	 NULL  is  returned  if  no matching filters are found.  lfi_scope will be one of
       LDAP_SCOPE_BASE, LDAP_SCOPE_ONELEVEL, or LDAP_SCOPE_SUBTREE.  lfi_isexact will be zero  if
       the filter has any '~' or '*' characters in it and non-zero otherwise.

       ldap_getnextfilter()  retrieves	the  next  appropriate	filter in the filter set that was
       determined when ldap_getfirstfilter was called.	It returns NULL when the  list	has  been

       ldap_setfilteraffixes()	sets  a prefix to be prepended and a suffix to be appended to all
       filters returned in the future.

       ldap_build_filter() constructs an LDAP search filter in	buf.   buflen  is  the	size,  in
       bytes,  of the largest filter buf can hold.  A pattern for the desired filter is passed in
       pattern.  Where the string %a appears in the pattern it is replaced with attr.  prefix  is
       pre-pended  to the resulting filter, and suffix is appended.  Either can be NULL (in which
       case they are not used).  value and valwords are used when the string %v appears  in  pat-
       tern.  See ldapfilter.conf(5) for a description of how %v is handled.

       NULL  is  returned  by  ldap_init_getfilter  if	there  is an error reading file.  NULL is
       returned by ldap_getfirstfilter and ldap_getnextfilter when there are no more  appropriate
       filters to return.

       The  return  values  for  all of these functions are declared in the <ldap.h> header file.
       Some routines may dynamically allocate memory which the caller must free  using	the  sup-
       plied deallocator routines.


       ldap(3), ldapfilter.conf(5)

       OpenLDAP  is  developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
       OpenLDAP is derived from University of Michigan LDAP 3.3 Release.

OpenLDAP 2.0.27-Release 		22 September 1998			LDAP_GETFILTER(3)
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