960 lines
18 KiB
Groff
960 lines
18 KiB
Groff
.\" $NetBSD: nsdispatch.3,v 1.34 2017/07/03 21:32:49 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1997, 1998, 1999, 2004, 2005, 2008
|
|
.\" The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Luke Mewburn; and by Jason R. Thorpe.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd January 4, 2015
|
|
.Dt NSDISPATCH 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nsdispatch
|
|
.Nd name-service switch dispatcher routine
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In nsswitch.h
|
|
.Ft int
|
|
.Fo nsdispatch
|
|
.Fa "void *nsdrv"
|
|
.Fa "const ns_dtab dtab[]"
|
|
.Fa "const char *database"
|
|
.Fa "const char *name"
|
|
.Fa "const ns_src defaults[]"
|
|
.Fa "..."
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn nsdispatch
|
|
function invokes the callback functions specified in
|
|
.Fa dtab
|
|
in the order given in
|
|
.Pa /etc/nsswitch.conf
|
|
for the database
|
|
.Fa database
|
|
until the action criteria for a source of that database is fulfilled.
|
|
.Pp
|
|
.Fa nsdrv
|
|
is passed to each callback function to use as necessary
|
|
(to pass back to the caller of
|
|
.Fn nsdispatch ) .
|
|
.Pp
|
|
.Fa dtab
|
|
is an array of
|
|
.Fa ns_dtab
|
|
structures, which have the following format:
|
|
.Bl -item -offset indent
|
|
.It
|
|
.Bd -literal
|
|
typedef struct {
|
|
const char *src;
|
|
nss_method cb;
|
|
void *cb_data;
|
|
} ns_dtab;
|
|
.Ed
|
|
.It
|
|
The
|
|
.Fa dtab
|
|
array should consist of one entry for each source type that has a
|
|
static implementation,
|
|
with
|
|
.Fa src
|
|
as the name of the source,
|
|
.Fa cb
|
|
as a callback function which handles that source, and
|
|
.Fa cb_data
|
|
as a pointer to arbitrary data to be passed to the callback function.
|
|
The last entry in
|
|
.Fa dtab
|
|
should contain
|
|
.Dv NULL
|
|
values for
|
|
.Fa src ,
|
|
.Fa cb ,
|
|
and
|
|
.Fa cb_data .
|
|
.It
|
|
The callback function signature is described by the typedef:
|
|
.Bd -ragged -offset indent
|
|
.Ft typedef int
|
|
.Fo \*(lp*nss_method\*(rp
|
|
.Fa "void *cbrv"
|
|
.Fa "void *cbdata"
|
|
.Fa "va_list ap"
|
|
.Fc ;
|
|
.Bl -tag -width cbdata
|
|
.It Fa cbrv
|
|
The
|
|
.Fa nsdrv
|
|
that
|
|
.Fn nsdispatch
|
|
was invoked with.
|
|
.It Fa cbdata
|
|
The
|
|
.Fa cb_data
|
|
member of the array entry for the source that this
|
|
callback function implements in the
|
|
.Fa dtab
|
|
argument of
|
|
.Fn nsdispatch .
|
|
.It Fa ap
|
|
The
|
|
.Fa ...
|
|
arguments to
|
|
.Fn nsdispatch ,
|
|
converted to a
|
|
.Ft va_list .
|
|
.El
|
|
.Ed
|
|
.El
|
|
.Pp
|
|
.Fa database
|
|
and
|
|
.Fa name
|
|
are used to select methods from optional per-source
|
|
dynamically-loaded modules.
|
|
.Fa name
|
|
is usually the name of the function calling
|
|
.Fn nsdispatch .
|
|
Note that the callback functions provided by
|
|
.Fa dtab
|
|
take priority over those implemented in dynamically-loaded modules in the
|
|
event of a conflict.
|
|
.Pp
|
|
.Fa defaults
|
|
contains a list of default sources to try in the case of
|
|
a missing or corrupt
|
|
.Xr nsswitch.conf 5 ,
|
|
or if there isn't a relevant entry for
|
|
.Fa database .
|
|
It is an array of
|
|
.Fa ns_src
|
|
structures, which have the following format:
|
|
.Bl -item -offset indent
|
|
.It
|
|
.Bd -literal
|
|
typedef struct {
|
|
const char *src;
|
|
uint32_t flags;
|
|
} ns_src;
|
|
.Ed
|
|
.It
|
|
The
|
|
.Fa defaults
|
|
array should consist of one entry for each source to consult by default
|
|
indicated by
|
|
.Fa src ,
|
|
and
|
|
.Fa flags
|
|
set to the desired behavior
|
|
(usually
|
|
.Dv NS_SUCCESS ;
|
|
refer to
|
|
.Sx Callback function return values
|
|
for more information).
|
|
The last entry in
|
|
.Fa defaults
|
|
should have
|
|
.Fa src
|
|
set to
|
|
.Dv NULL
|
|
and
|
|
.Fa flags
|
|
set to 0.
|
|
.It
|
|
Some invokers of
|
|
.Fn nsdispatch
|
|
(such as
|
|
.Xr setgrent 3 )
|
|
need to force all callback functions to be invoked,
|
|
irrespective of the action criteria listed in
|
|
.Xr nsswitch.conf 5 .
|
|
This can be achieved by adding
|
|
.Dv NS_FORCEALL
|
|
to
|
|
.Fa defaults[0].flags
|
|
before invoking
|
|
.Fn nsdispatch .
|
|
The return value of
|
|
.Fn nsdispatch
|
|
will be the result of the final callback function invoked.
|
|
.It
|
|
For convenience, a global variable defined as:
|
|
.Dl extern const ns_src __nsdefaultsrc[];
|
|
exists which contains a single default entry for
|
|
.Sq files
|
|
for use by callers which don't require complicated default rules.
|
|
.El
|
|
.Pp
|
|
.Fa ...
|
|
are optional extra arguments, which
|
|
are passed to the appropriate callback function as a
|
|
.Xr stdarg 3
|
|
variable argument
|
|
list of the type
|
|
.Fa va_list .
|
|
.Pp
|
|
.Nm
|
|
returns the value of the callback function that caused the dispatcher
|
|
to finish, or
|
|
.Dv NS_NOTFOUND
|
|
otherwise.
|
|
.\"
|
|
.Ss Dynamically-loaded module interface
|
|
The
|
|
.Fn nsdispatch
|
|
function loads callback functions from the run-time link-editor's search
|
|
path using the following naming convention:
|
|
.Bl -item -offset indent
|
|
.It
|
|
.Bd -literal
|
|
nss_<source>.so.<version>
|
|
.Ed
|
|
.Bl -tag -width XversionX
|
|
.It Aq source
|
|
The source that the module implements.
|
|
.It Aq version
|
|
The
|
|
.Nm nsdispatch
|
|
module interface version, which is defined by the integer
|
|
.Dv NSS_MODULE_INTERFACE_VERSION ,
|
|
which has the value 0.
|
|
.El
|
|
.El
|
|
.Pp
|
|
When a module is loaded,
|
|
.Fn nsdispatch
|
|
looks for and calls the following function in the module:
|
|
.Pp
|
|
.Bd -ragged -offset indent
|
|
.Ft ns_mtab *
|
|
.Fo nss_module_register
|
|
.Fa "const char *source"
|
|
.Fa "u_int *nelems"
|
|
.Fa "nss_module_unregister_fn *unreg"
|
|
.Fc ;
|
|
.Pp
|
|
.Bl -tag -width source
|
|
.It Fa source
|
|
The name of the source that the module implements, as used by
|
|
.Fn nsdispatch
|
|
to construct the module's name.
|
|
.It Fa nelems
|
|
A pointer to an unsigned integer that
|
|
.Fn nss_module_register
|
|
should set to the number of elements in the
|
|
.Ft ns_mtab
|
|
array returned by
|
|
.Fn nss_module_register ,
|
|
or
|
|
.Dv 0
|
|
if there was a failure.
|
|
.It Fa unreg
|
|
A pointer to a function pointer that
|
|
.Fn nss_module_register
|
|
can optionally set to an unregister function to be invoked when the module is
|
|
unloaded, or
|
|
.Dv NULL
|
|
if there isn't one.
|
|
.El
|
|
.Ed
|
|
.Pp
|
|
The unregister function signature is described by the typedef:
|
|
.Pp
|
|
.Bd -ragged -offset indent
|
|
.Ft typedef void
|
|
.Fo \*(lp*nss_module_unregister_fn\*(rp
|
|
.Fa "ns_mtab *mtab"
|
|
.Fa "u_int nelems"
|
|
.Fc ;
|
|
.Pp
|
|
.Bl -tag -width nelems
|
|
.It Fa mtab
|
|
The array of
|
|
.Ft ns_mtab
|
|
structures returned by
|
|
.Fn nss_module_register .
|
|
.It Fa nelems
|
|
The
|
|
.Fa *nelems
|
|
value set by
|
|
.Fn nss_module_register .
|
|
.El
|
|
.Ed
|
|
.Pp
|
|
.Fn nss_module_register
|
|
returns an array of
|
|
.Ft ns_mtab
|
|
structures
|
|
(with
|
|
.Fa *nelems
|
|
entries), or
|
|
.Dv NULL
|
|
if there was a failure.
|
|
The
|
|
.Ft ns_mtab
|
|
structures have the following format:
|
|
.Bl -item -offset indent
|
|
.It
|
|
.Bd -literal
|
|
typedef struct {
|
|
const char *database;
|
|
const char *name;
|
|
nss_method method;
|
|
void *mdata;
|
|
} ns_mtab;
|
|
.Ed
|
|
.It
|
|
The
|
|
.Fa mtab
|
|
array should consist of one entry for each callback function (method)
|
|
that is implemented,
|
|
with
|
|
.Fa database
|
|
as the name of the database,
|
|
.Fa name
|
|
as the name of the callback function,
|
|
.Fa method
|
|
as the
|
|
.Ft nss_method
|
|
callback function that implements the method, and
|
|
.Fa mdata
|
|
as a pointer to arbitrary data to be passed to the callback function as its
|
|
.Fa cbdata
|
|
argument.
|
|
.El
|
|
.\"
|
|
.Ss Valid source types
|
|
While there is support for arbitrary sources, the following
|
|
#defines for commonly implemented sources are provided:
|
|
.Bl -column NSSRC_COMPAT COMPAT -offset indent
|
|
.It Sy #define Value
|
|
.It NSSRC_FILES "files"
|
|
.It NSSRC_DNS "dns"
|
|
.It NSSRC_NIS "nis"
|
|
.It NSSRC_COMPAT "compat"
|
|
.El
|
|
.Pp
|
|
Refer to
|
|
.Xr nsswitch.conf 5
|
|
for a complete description of what each source type is.
|
|
.\"
|
|
.Ss Valid database types
|
|
While there is support for arbitrary databases, the following
|
|
#defines for currently implemented system databases are provided:
|
|
.Bl -column NSDB_PASSWD_COMPAT PASSWD_COMPAT -offset indent
|
|
.It Sy #define Value
|
|
.It NSDB_HOSTS "hosts"
|
|
.It NSDB_GROUP "group"
|
|
.It NSDB_GROUP_COMPAT "group_compat"
|
|
.It NSDB_NETGROUP "netgroup"
|
|
.It NSDB_NETWORKS "networks"
|
|
.It NSDB_PASSWD "passwd"
|
|
.It NSDB_PASSWD_COMPAT "passwd_compat"
|
|
.It NSDB_SHELLS "shells"
|
|
.El
|
|
.Pp
|
|
Refer to
|
|
.Xr nsswitch.conf 5
|
|
for a complete description of what each database is.
|
|
.\"
|
|
.Ss Callback function return values
|
|
The callback functions should return one of the following values
|
|
depending upon status of the lookup:
|
|
.Bl -column NS_NOTFOUND -offset indent
|
|
.It Sy "Return value" Status code
|
|
.It NS_SUCCESS The requested entry was found.
|
|
.It NS_NOTFOUND The entry is not present at this source.
|
|
.It NS_TRYAGAIN The source is busy, and may respond to retries.
|
|
.It NS_UNAVAIL The source is not responding, or entry is corrupt.
|
|
.El
|
|
.\"
|
|
.Sh CALLBACK FUNCTION API FOR STANDARD DATABASES
|
|
The organization of the
|
|
.Fa ap
|
|
argument for an
|
|
.Fn nss_method
|
|
callback function for a standard method in a standard database is:
|
|
.Bl -enum -offset indent -compact
|
|
.It
|
|
Pointer to return value of the standard function.
|
|
.It
|
|
First argument of the standard function.
|
|
.It
|
|
(etc.)
|
|
.El
|
|
.Pp
|
|
For example, given the standard function
|
|
.Xr getgrnam 3 :
|
|
.Bd -ragged -offset indent -compact
|
|
.Ft struct group *
|
|
.Fn getgrnam "const char *name"
|
|
.Ed
|
|
the
|
|
.Fa ap
|
|
organization used by the callback functions is:
|
|
.Bl -enum -offset indent -compact
|
|
.It
|
|
.Ft "struct group **"
|
|
.It
|
|
.Ft "const char *"
|
|
.El
|
|
.Pp
|
|
.Sy NOTE:
|
|
Not all standard databases are using this calling convention yet;
|
|
those that aren't are noted below.
|
|
These will be changed in the future.
|
|
.Pp
|
|
The callback function names and
|
|
.Ft va_list
|
|
organization for various standard database callback functions are:
|
|
.\"
|
|
.Ss Methods for hosts database
|
|
.Bl -tag -width 3n
|
|
.It Sy getaddrinfo
|
|
.Ft "char *name" ,
|
|
.Ft "const struct addrinfo *pai"
|
|
.Pp
|
|
Returns
|
|
.Ft "struct addrinfo *"
|
|
via
|
|
.Ft "void *cbrv" .
|
|
.It Sy gethostbyaddr
|
|
.Ft "unsigned char *addr" ,
|
|
.Ft "int addrlen" ,
|
|
.Ft "int af"
|
|
.Pp
|
|
Returns
|
|
.Ft "struct getnamaddr *"
|
|
via
|
|
.Ft "void *cbrv" .
|
|
.It Sy gethostbyname
|
|
.Ft "char *name" ,
|
|
.Ft "int namelen" ,
|
|
.Ft "int af"
|
|
.Pp
|
|
Returns
|
|
.Ft "struct getnamaddr *"
|
|
via
|
|
.Ft "void *cbrv" .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Ft "struct getnamaddr"
|
|
is defined internally in libc as:
|
|
.Bd -literal
|
|
struct getnamaddr {
|
|
struct hostent *hp;
|
|
char *buf;
|
|
size_t buflen;
|
|
int *he;
|
|
};
|
|
.Ed
|
|
.\"
|
|
.Ss Methods for group and group_compat databases
|
|
.Bl -tag -width 3n
|
|
.It Sy endgrent
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.It Sy getgrent
|
|
.Ft "struct group **retval"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct group"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getgrent 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getgrent_r
|
|
.Ft "int *retval" ,
|
|
.Ft "struct group *grp" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct group **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getgrent_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy getgrgid
|
|
.Ft "struct group **retval" ,
|
|
.Ft "gid_t gid"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct group"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getgrgid 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getgrgid_r
|
|
.Ft "int *retval" ,
|
|
.Ft "gid_t gid" ,
|
|
.Ft "struct group *grp" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct group **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getgrgid_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy getgrnam
|
|
.Ft "struct group **retval" ,
|
|
.Ft "const char *name"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct group"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getgrnam 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getgrnam_r
|
|
.Ft "int *retval" ,
|
|
.Ft "const char *name" ,
|
|
.Ft "struct group *grp" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct group **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getgrnam_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy getgroupmembership
|
|
.Ft "int *retval" ,
|
|
.Ft "const char *name" ,
|
|
.Ft "gid_t basegid" ,
|
|
.Ft "gid_t *groups" ,
|
|
.Ft "int maxgrp" ,
|
|
.Ft "int *groupc"
|
|
.Pp
|
|
.Fa retval
|
|
is unused.
|
|
.Pp
|
|
Lookups for
|
|
.Sy group_compat
|
|
are also stopped if
|
|
.Dv NS_SUCCESS
|
|
was returned to prevent multiple
|
|
.Dq "+:"
|
|
compat entries from being expanded.
|
|
.Pp
|
|
.Xr getgroupmembership 3
|
|
returns
|
|
is -1 if
|
|
.Fa *groupc
|
|
is greater than to
|
|
.Fa maxgrp ,
|
|
and 0 otherwise.
|
|
.It Sy setgroupent
|
|
.Ft "int *retval" ,
|
|
.Ft "int stayopen"
|
|
.Pp
|
|
.Fa retval
|
|
should be set to 0 on failure and 1 on success.
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.It Sy setgrent
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.El
|
|
.\"
|
|
.Ss Methods for netgroup database
|
|
.Sy NOTE:
|
|
The method APIs for this database will be changing in the near future.
|
|
.Bl -tag -width 3n
|
|
.It Sy endnetgrent
|
|
Empty
|
|
.Fa ap .
|
|
.It Sy lookup
|
|
.Ft "char *name" ,
|
|
.Ft "char **line" ,
|
|
.Ft "int bywhat"
|
|
.Pp
|
|
Find the given
|
|
.Fa name
|
|
and return its value in
|
|
.Fa line .
|
|
.Fa bywhat
|
|
is one of
|
|
.Dv _NG_KEYBYNAME ,
|
|
.Dv _NG_KEYBYUSER ,
|
|
or
|
|
.Dv _NG_KEYBYHOST .
|
|
.It Sy getnetgrent
|
|
.Ft "int *retval" ,
|
|
.Ft "const char **host" ,
|
|
.Ft "const char **user" ,
|
|
.Ft "const char **domain"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to 0 for no more netgroup members and 1 otherwise.
|
|
.Pp
|
|
.Xr getnetgrent 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
0 otherwise.
|
|
.It Sy innetgr
|
|
.Ft "int *retval" ,
|
|
.Ft "const char *grp" ,
|
|
.Ft "const char *host" ,
|
|
.Ft "const char *user" ,
|
|
.Ft "const char *domain"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to 1 for a successful match and 0 otherwise.
|
|
.It Sy setnetgrent
|
|
.Ft "const char *netgroup"
|
|
.El
|
|
.\"
|
|
.Ss Methods for networks database
|
|
.Bl -tag -width 3n
|
|
.It Sy getnetbyaddr
|
|
.Ft "struct netent **retval" ,
|
|
.Ft "uint32_t net" ,
|
|
.Ft "int type"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct netent"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getnetbyaddr 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getnetbyname
|
|
.Ft "struct netent **retval" ,
|
|
.Ft "const char *name"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct netent"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getnetbyname 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.El
|
|
.\"
|
|
.Ss Methods for passwd and passwd_compat databases
|
|
.Bl -tag -width 3n
|
|
.It Sy endpwent
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.It Sy getpwent
|
|
.Ft "struct passwd **retval"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct passwd"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getpwent 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getpwent_r
|
|
.Ft "int *retval" ,
|
|
.Ft "struct passwd *pw" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct passwd **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getpwent_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy getpwnam
|
|
.Ft "struct passwd **retval" ,
|
|
.Ft "const char *name"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct passwd"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getpwnam 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getpwnam_r
|
|
.Ft "int *retval" ,
|
|
.Ft "const char *name" ,
|
|
.Ft "struct passwd *pw" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct passwd **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getpwnam_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy getpwuid
|
|
.Ft "struct passwd **retval" ,
|
|
.Ft "uid_t uid"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to a pointer to an internal static
|
|
.Ft "struct passwd"
|
|
on success,
|
|
.Dv NULL
|
|
otherwise.
|
|
.Pp
|
|
.Xr getpwuid 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
.Dv NULL
|
|
otherwise.
|
|
.It Sy getpwuid_r
|
|
.Ft "int *retval" ,
|
|
.Ft "uid_t uid" ,
|
|
.Ft "struct passwd *pw" ,
|
|
.Ft "char *buffer" ,
|
|
.Ft "size_t buflen" ,
|
|
.Ft "struct passwd **result"
|
|
.Pp
|
|
.Fa *retval
|
|
should be set to an appropriate
|
|
.Xr errno 2
|
|
on failure.
|
|
.Pp
|
|
.Xr getpwuid_r 3
|
|
returns 0
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS
|
|
or
|
|
.Dv NS_NOTFOUND ,
|
|
and
|
|
.Fa *retval
|
|
otherwise.
|
|
.It Sy setpassent
|
|
.Ft "int *retval" ,
|
|
.Ft "int stayopen"
|
|
.Pp
|
|
.Fa retval
|
|
should be set to 0 on failure and 1 on success.
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.It Sy setpwent
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.El
|
|
.\"
|
|
.Ss Methods for shells database
|
|
.Bl -tag -width 3n
|
|
.It Sy endusershell
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.It Sy getusershell
|
|
.Ft "char **retval"
|
|
.Pp
|
|
.Xr getusershell 3
|
|
returns
|
|
.Fa *retval
|
|
if
|
|
.Fn nsdispatch
|
|
returns
|
|
.Dv NS_SUCCESS ,
|
|
and 0 otherwise.
|
|
.It Sy setusershell
|
|
Empty
|
|
.Fa ap .
|
|
.Pp
|
|
All methods for all sources are invoked for this method name.
|
|
.El
|
|
.\"
|
|
.Sh SEE ALSO
|
|
.Xr ld.elf_so 1 ,
|
|
.Xr hesiod 3 ,
|
|
.Xr stdarg 3 ,
|
|
.Xr ypclnt 3 ,
|
|
.Xr nsswitch.conf 5
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
routines first appeared in
|
|
.Nx 1.4 .
|
|
Support for dynamically-loaded modules first appeared in
|
|
.Nx 3.0 .
|
|
.Sh AUTHORS
|
|
.An Luke Mewburn
|
|
.Aq Mt lukem@NetBSD.org
|
|
wrote this freely distributable name-service switch implementation,
|
|
using ideas from the
|
|
.Tn ULTRIX
|
|
.Xr svc.conf 5
|
|
and
|
|
.Tn Solaris
|
|
.Xr nsswitch.conf 4
|
|
manual pages.
|
|
Support for dynamically-loaded modules was added by
|
|
.An Jason Thorpe
|
|
.Aq Mt thorpej@NetBSD.org ,
|
|
based on code developed by the
|
|
.Fx
|
|
Project.
|