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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* getspent.c
*
* lib/nsswitch/compat/getspent.c -- name-service-switch backend for getspnam()
* It looks in /etc/shadow; if it finds shadow entries there that begin
* with "+" or "-", it consults other services. By default it uses NIS (YP),
* but the user can override this with a "passwd_compat" entry in
* /etc/nsswitch.conf, e.g.
* passwd_compat: ldap
* The main criterion for this code is that it behave in the same way as
* the code for getpwnam() and friends (in getpwent.c). Note that it uses
* the same nsswitch.conf entry, not a separate entry for "shadow_compat".
*
* Caveats:
* - More than one source may be specified, with the usual switch semantics,
* but having multiple sources here is definitely odd.
* - People who recursively specify "compat" deserve what they get.
* - Entries that begin with "+@" or "-@" are interpreted using
* getnetgrent() and innetgr(), which use the "netgroup" entry in
* /etc/nsswitch.conf. If the sources for "passwd_compat" and "netgroup"
* differ, everything should work fine, but the semantics will be pretty
* confusing.
*/
#include <shadow.h>
#include <string.h>
#include <stdlib.h>
#include "compat_common.h"
static DEFINE_NSS_DB_ROOT(db_root);
static void
_nss_initf_shadow_compat(p)
nss_db_params_t *p;
{
p->name = NSS_DBNAM_SHADOW;
p->config_name = NSS_DBNAM_PASSWD_COMPAT;
p->default_config = NSS_DEFCONF_PASSWD_COMPAT;
}
static const char *
get_spnamp(argp)
nss_XbyY_args_t *argp;
{
struct spwd *s = (struct spwd *)argp->returnval;
return (s->sp_namp);
}
static int
check_spnamp(argp)
nss_XbyY_args_t *argp;
{
struct spwd *s = (struct spwd *)argp->returnval;
return (strcmp(s->sp_namp, argp->key.name) == 0);
}
static nss_status_t
getbyname(be, a)
compat_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
return (_nss_compat_XY_all(be, argp, check_spnamp,
NSS_DBOP_SHADOW_BYNAME));
}
/*ARGSUSED*/
static int
merge_spents(be, argp, fields)
compat_backend_ptr_t be;
nss_XbyY_args_t *argp;
const char **fields;
{
struct spwd *sp = (struct spwd *)argp->buf.result;
/*
* Don't allow overriding of the username; apart from that,
* anything is fair game.
*/
if (fields[1] != 0) {
size_t namelen = strlen(sp->sp_namp) + 1;
size_t passlen = strlen(fields[1]) + 1;
/* ===> Probably merits an explanation... */
if (namelen + passlen > argp->buf.buflen) {
return (NSS_STR_PARSE_ERANGE);
}
if (sp->sp_namp != argp->buf.buffer) {
(void) memmove(argp->buf.buffer,
sp->sp_namp, namelen);
sp->sp_namp = argp->buf.buffer;
}
(void) memcpy(argp->buf.buffer + namelen,
fields[1], passlen);
}
#define override(field, longp) \
if ((field) != 0) { \
char *end; \
long val = strtol(field, &end, 10); \
\
if (*end == '\0') { \
*(longp) = val; \
} else { \
return (NSS_STR_PARSE_PARSE); \
} \
}
/* do not override last changed date, it never gets reset. */
/* override(fields[2], &sp->sp_lstchg); */
override(fields[3], &sp->sp_min);
override(fields[4], &sp->sp_max);
override(fields[5], &sp->sp_warn);
override(fields[6], &sp->sp_inact);
override(fields[7], &sp->sp_expire);
override(fields[8], &sp->sp_flag);
/*
* if asked, return the data in /etc file format
*/
if (be->return_string_data == 1) {
int n;
char b[16 * 7];
/* reset the result ptr to the original value */
argp->buf.result = NULL;
#define printnum(i, num) \
sprintf(b + (i * 16), "%d", num)) ? b + (i * 16) : ""
n = snprintf(argp->buf.buffer, argp->buf.buflen,
"%s:%s:%s:%s:%s:%s:%s:%s:%s", sp->sp_namp,
(sp->sp_pwdp ? sp->sp_pwdp : ""),
(sp->sp_lstchg >= 0 && printnum(0, sp->sp_lstchg),
(sp->sp_min >= 0 && printnum(1, sp->sp_min),
(sp->sp_max >= 0 && printnum(2, sp->sp_max),
(sp->sp_warn > 0 && printnum(3, sp->sp_warn),
(sp->sp_inact > 0 && printnum(4, sp->sp_inact),
(sp->sp_expire > 0 && printnum(5, sp->sp_expire),
(sp->sp_flag != 0 && printnum(6, sp->sp_flag));
if (n > argp->buf.buflen)
return (NSS_STR_PARSE_ERANGE);
else {
argp->returnlen = n - 1;
return (NSS_SUCCESS);
}
} else
return (NSS_STR_PARSE_SUCCESS);
}
static compat_backend_op_t shadow_ops[] = {
_nss_compat_destr,
_nss_compat_endent,
_nss_compat_setent,
_nss_compat_getent,
getbyname
};
/*ARGSUSED*/
nss_backend_t *
_nss_compat_shadow_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_compat_constr(shadow_ops,
sizeof (shadow_ops) / sizeof (shadow_ops[0]),
SHADOW,
NSS_LINELEN_SHADOW,
&db_root,
_nss_initf_shadow_compat,
1,
get_spnamp,
merge_spents));
}
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