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ldap(3) |
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ldap - OpenLDAP Lightweight Directory Access Protocol API
#include <ldap.h>
The Lightweight Directory Access Protocol provides access to X.500 directory services. The services may be stand−alone part of a distributed directory service. This API supports LDAP over TCP, LDAP over SSL, and LDAP over IPC (UNIX domain sockets).
The OpenLDAP LDAP package includes a stand-alone server in slapd(8), various LDAP clients, and an LDAP client library used to provide programmatic access to the LDAP protocol. This man page gives an overview of the LDAP library routines.
Both synchronous and asynchronous APIs are provided. Also included are various routines to parse the results returned from these routines. These routines are found in the −lldap library.
The basic interaction is as follows. A session handle associated with created using ldap_init(3). The underlying session is established upon first use which is commonly an LDAP bind operation. The LDAP bind operation is performed by calling one of ldap_sasl_bind(3) and friends. Next, other operations are performed by calling one of the synchronous or asynchronous routines (e.g., ldap_search_ext_s(3) or ldap_search_ext(3) followed by ldap_result(3)). Results returned from these routines are interpreted by calling the LDAP parsing routines such as ldap_parse_result(3). The LDAP association and underlying connection is terminated by calling ldap_unbind_ext(3). Errors can be interpreted by calling ldap_err2string(3).
Search filters to be passed to the ldap search routines can be constructed by hand, or by calling the ldap_getfilter(3) routines, which use the ldapgetfilter.conf(5) file to turn a string (presumably that a user has typed) into a series of search filters.
Results obtained from the ldap search routines can be output by hand, by calling ldap_first_entry(3) and ldap_next_entry(3) to step through the entries returned, ldap_first_attribute(3) and ldap_next_attribute(3) to step through an entry’s attributes, and ldap_get_values(3) to retrieve a given attribute’s value. Attribute values may or may not be displayable.
Alternatively, the entry can be output automatically by calling the ldap_entry2text(3), ldap_entry2text_search(3), ldap_entry2html(3), or ldap_entry2html_search(3) routines. These routines look up the object class of the entry they are passed in the ldaptemplates.conf(5) file to decide which attributes to display and how to display them. Output is handled via a routine passed in as a parameter.
The ldap_url(3) routines can be used test a URL to see if it is an LDAP URL, to parse LDAP URLs into their component pieces, and to initiate searches directly using an LDAP URL.
The ldap_cache(3) routines implement a local client caching scheme, providing a substantial performance increase for repeated queries.
Also provided are various utility routines. The ldap_sort(3) routines are used to sort the entries and values returned via the ldap search routines. The ldap_friendly(3) routines are used to map from short two letter country codes (or other strings) to longer "friendlier" names.
Also included in the distribution is a set of lightweight Basic Encoding Rules routines. These routines are used by the LDAP library routines to encode and decode LDAP protocol elements using the (slightly simplified) Basic Encoding Rules defined by LDAP. They are not normally used directly by an LDAP application program excepting in the handling of controls and extended operations. The routines provide a printf and scanf-like interface, as well as lower-level access. These routines are found in the -llber library.
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ldap_open(3) |
open a connection to an LDAP server | ||
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ldap_init(3) |
initialize the LDAP library without opening a connection to a server | ||
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ldap_result(3) |
wait for the result from an asynchronous operation | ||
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ldap_abandon(3) |
abandon (abort) an asynchronous operation | ||
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ldap_add(3) |
asynchronously add an entry | ||
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ldap_add_s(3) |
synchronously add an entry | ||
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ldap_bind(3) |
asynchronously bind to the directory | ||
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ldap_bind_s(3) |
synchronously bind to the directory | ||
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ldap_simple_bind(3) |
asynchronously bind to the directory using simple authentication |
ldap_simple_bind_s(3)
synchronously bind to the directory using simple authentication
ldap_kerberos_bind_s(3)
synchronously bind to the directory using kerberos authentication
ldap_kerberos_bind1(3)
asynchronously bind to the LDAP server using kerberos authentication
ldap_kerberos_bind1_s(3)
synchronously bind to the LDAP server using kerberos authentication
ldap_kerberos_bind2(3)
asynchronously bind to the DSA using kerberos authentication
ldap_kerberos_bind2_s(3)
synchronously bind to the DSA using kerberos authentication
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ldap_unbind(3) |
synchronously unbind from the LDAP server and close the connection | ||
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ldap_unbind_s(3) |
equivalent to ldap_unbind(3) | ||
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ldap_memfree (3) |
dispose of memory allocated by LDAP routines. |
ldap_enable_cache(3)
enable LDAP client caching
ldap_disable_cache(3)
disable LDAP client caching
ldap_destroy_cache(3)
disable LDAP client caching and destroy cache contents
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ldap_flush_cache(3) |
flush LDAP client cache |
ldap_uncache_entry(3)
uncache requests pertaining to an entry
ldap_uncache_request(3)
uncache a request
ldap_set_cache_options(3)
set cache options
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ldap_compare(3) |
asynchronous compare to a directory entry | ||
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ldap_compare_s(3) |
synchronous compare to a directory entry | ||
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ldap_delete(3) |
asynchronously delete an entry | ||
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ldap_delete_s(3) |
synchronously delete an entry |
ldap_init_templates(3)
initialize display template routines from a file
ldap_init_templates_buf(3)
initialize display template routines from a buffer
ldap_free_templates(3)
free display template routine memory
ldap_first_disptmpl(3)
get first display template
ldap_next_disptmpl(3)
get next display template
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ldap_oc2template(3) |
return template appropriate for objectclass |
ldap_name2template(3)
return named template
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ldap_tmplattrs(3) |
return attributes needed by template |
ldap_first_tmplrow(3)
return first row of displayable items in a template
ldap_next_tmplrow(3)
return next row of displayable items in a template
ldap_first_tmplcol(3)
return first column of displayable items in a template
ldap_next_tmplcol(3)
return next column of displayable items in a template
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ldap_entry2text(3) |
display an entry as text using a display template |
ldap_entry2text_search(3)
search for and display an entry as text using a display template
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ldap_vals2text(3) |
display values as text | ||
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ldap_entry2html(3) |
display an entry as HTML (HyperText Markup Language) using a display template |
ldap_entry2html_search(3)
search for and display an entry as HTML using a display template
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ldap_vals2html(3) |
display values as HTML | ||
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ldap_perror(3) |
print an LDAP error indication to standard error | ||
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ld_errno(3) |
LDAP error indication |
ldap_result2error(3)
extract LDAP error indication from LDAP result
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ldap_errlist(3) |
list of ldap errors and their meanings | ||
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ldap_err2string(3) |
convert LDAP error indication to a string |
ldap_first_attribute(3)
return first attribute name in an entry
ldap_next_attribute(3)
return next attribute name in an entry
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ldap_first_entry(3) |
return first entry in a chain of search results | ||
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ldap_next_entry(3) |
return next entry in a chain of search results |
ldap_count_entries(3)
return number of entries in a search result
ldap_friendly_name(3)
map from unfriendly to friendly names
ldap_free_friendlymap(3)
free resources used by ldap_friendly(3)
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ldap_get_dn(3) |
extract the DN from an entry | ||
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ldap_explode_dn(3) |
convert a DN into its component parts | ||
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ldap_explode_rdn(3) |
convert a RDN into its component parts | ||
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ldap_get_values(3) |
return an attribute’s values |
ldap_get_values_len(3)
return an attribute values with lengths
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ldap_value_free(3) |
free memory allocated by ldap_get_values(3) |
ldap_value_free_len(3)
free memory allocated by ldap_get_values_len(3)
ldap_count_values(3)
return number of values
ldap_count_values_len(3)
return number of values
ldap_init_getfilter(3)
initialize getfilter routines from a file
ldap_init_getfilter_buf(3)
initialize getfilter routines from a buffer
ldap_getfilter_free(3)
free resources allocated by ldap_init_getfilter(3)
ldap_getfirstfilter(3)
return first search filter
ldap_getnextfilter(3)
return next search filter
ldap_build_filter(3)
construct an LDAP search filter from a pattern
ldap_setfilteraffixes(3)
set prefix and suffix for search filters
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ldap_modify(3) |
asynchronously modify an entry | ||
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ldap_modify_s(3) |
synchronously modify an entry | ||
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ldap_mods_free(3) |
free array of pointers to mod structures used by ldap_modify(3) | ||
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ldap_modrdn2(3) |
asynchronously modify the RDN of an entry | ||
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ldap_modrdn2_s(3) |
synchronously modify the RDN of an entry | ||
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ldap_modrdn(3) |
depreciated - use ldap_modrdn2(3) | ||
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ldap_modrdn_s(3) |
depreciated - use ldap_modrdn2_s(3) | ||
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ldap_msgfree(3) |
free results allocated by ldap_result(3) | ||
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ldap_msgtype(3) |
return the message type of a message from ldap_result(3) | ||
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ldap_msgid(3) |
return the message id of a message from ldap_result(3) | ||
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ldap_search(3) |
asynchronously search the directory | ||
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ldap_search_s(3) |
synchronously search the directory | ||
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ldap_search_st(3) |
synchronously search the directory with timeout | ||
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ldap_is_ldap_url(3) |
check a URL string to see if it is an LDAP URL | ||
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ldap_url_parse(3) |
break up an LDAP URL string into its components | ||
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ldap_url_search(3) |
asynchronously search using an LDAP URL |
ldap_url_search_s(3)
synchronously search using an LDAP URL
ldap_url_search_st(3)
synchronously search using an LDAP URL and a timeout
ldap_init_searchprefs(3)
initialize searchprefs routines from a file
ldap_init_searchprefs_buf(3)
initialize searchprefs routines from a buffer
ldap_free_searchprefs(3)
free memory allocated by searchprefs routines
ldap_first_searchobj(3)
return first searchpref object
ldap_next_searchobj(3)
return next searchpref object
ldap_sort_entries(3)
sort a list of search results
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ldap_sort_values(3) |
sort a list of attribute values |
ldap_sort_strcasecmp(3)
case insensitive string comparison
slapd(8)
OpenLDAP is developed and maintained by The OpenLDAP Project (http://www.openldap.org/). OpenLDAP is derived from University of Michigan LDAP 3.3 Release.
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ldap(3) | |