getpwnam.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
*/
/*
* getpwnam.c
*
* Copyright (c) 1988-1992 Sun Microsystems Inc
* All Rights Reserved.
*
* nisplus/getpwnam.c -- NIS+ backend for nsswitch "passwd" database
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include "nisplus_common.h"
#include "nisplus_tables.h"
static nss_status_t
getbynam(be, a)
nisplus_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a;
return (_nss_nisplus_lookup(be, argp, PW_TAG_NAME, argp->key.name));
}
static nss_status_t
getbyuid(be, a)
nisplus_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a;
char uidstr[12]; /* More than enough */
sprintf(uidstr, "%d", argp->key.uid);
return (_nss_nisplus_lookup(be, argp, PW_TAG_UID, uidstr));
}
/*
* place the results from the nis_object structure into argp->buf.result
* Returns NSS_STR_PARSE_{SUCCESS, ERANGE, PARSE}
*
* This routine does not tolerate non-numeric or empty pw_uid or pw_gid.
* Nor empty name field.
* It will immediately flag a PARSE error and return. Returns a
* pointer-to-a-null in case of empty gecos, home_dir, or shell fields.
*/
/*ARGSUSED*/
static int
nis_object2ent(nobj, obj, argp)
int nobj;
nis_object *obj;
nss_XbyY_args_t *argp;
{
char *buffer, *limit, *val, *endnum, *nullstring;
int buflen = argp->buf.buflen;
struct passwd *pw;
struct entry_col *ecol;
int len;
limit = argp->buf.buffer + buflen;
pw = (struct passwd *)argp->buf.result;
buffer = argp->buf.buffer;
/*
* If we got more than one nis_object, we just ignore object(s)
* except the first. Although it should never have happened.
*
* ASSUMPTION: All the columns in the NIS+ tables are
* null terminated.
*/
if (obj->zo_data.zo_type != NIS_ENTRY_OBJ ||
obj->EN_data.en_cols.en_cols_len < PW_COL) {
/* namespace/table/object is curdled */
return (NSS_STR_PARSE_PARSE);
}
ecol = obj->EN_data.en_cols.en_cols_val;
/*
* pw_name: user name
*/
EC_SET(ecol, PW_NDX_NAME, len, val);
if (len < 2 || (*val == '\0'))
return (NSS_STR_PARSE_PARSE);
pw->pw_name = buffer;
buffer += len;
if (buffer >= limit)
return (NSS_STR_PARSE_ERANGE);
strcpy(pw->pw_name, val);
nullstring = (buffer - 1);
/*
* pw_uid: user id
*/
EC_SET(ecol, PW_NDX_UID, len, val);
if (len < 2) {
return (NSS_STR_PARSE_PARSE);
} else {
pw->pw_uid = strtol(val, &endnum, 10);
if (*endnum != 0 || val == endnum) {
return (NSS_STR_PARSE_PARSE);
}
}
/*
* pw_passwd: user passwd. Do not HAVE to get this here
* because the caller would do a getspnam() anyway.
*/
EC_SET(ecol, PW_NDX_PASSWD, len, val);
if (len < 2) {
/*
* don't return NULL pointer, lot of stupid programs
* out there.
*/
pw->pw_passwd = nullstring;
} else {
pw->pw_passwd = buffer;
buffer += len;
if (buffer >= limit)
return (NSS_STR_PARSE_ERANGE);
strcpy(pw->pw_passwd, val);
}
/*
* pw_gid: user's primary group id.
*/
EC_SET(ecol, PW_NDX_GID, len, val);
if (len < 2) {
return (NSS_STR_PARSE_PARSE);
} else {
pw->pw_gid = strtol(val, &endnum, 10);
if (*endnum != 0 || val == endnum) {
return (NSS_STR_PARSE_PARSE);
}
}
/*
* pw_gecos: user's real name.
*/
EC_SET(ecol, PW_NDX_GCOS, len, val);
if (len < 2) {
/*
* don't return NULL pointer, lot of stupid programs
* out there.
*/
pw->pw_gecos = nullstring;
} else {
pw->pw_gecos = buffer;
buffer += len;
if (buffer >= limit)
return (NSS_STR_PARSE_ERANGE);
strcpy(pw->pw_gecos, val);
}
/*
* pw_dir: user's home directory
*/
EC_SET(ecol, PW_NDX_HOME, len, val);
if (len < 2) {
/*
* don't return NULL pointer, lot of stupid programs
* out there.
*/
pw->pw_dir = nullstring;
} else {
pw->pw_dir = buffer;
buffer += len;
if (buffer >= limit)
return (NSS_STR_PARSE_ERANGE);
strcpy(pw->pw_dir, val);
}
/*
* pw_shell: user's login shell
*/
EC_SET(ecol, PW_NDX_SHELL, len, val);
if (len < 2) {
/*
* don't return NULL pointer, lot of stupid programs
* out there.
*/
pw->pw_shell = nullstring;
} else {
pw->pw_shell = buffer;
buffer += len;
if (buffer >= limit)
return (NSS_STR_PARSE_ERANGE);
strcpy(pw->pw_shell, val);
}
/*
* pw_age and pw_comment shouldn't be used anymore, but various things
* (allegedly in.ftpd) merrily do strlen() on them anyway, so we
* keep the peace by returning a zero-length string instead of a
* null pointer.
*/
pw->pw_age = pw->pw_comment = nullstring;
return (NSS_STR_PARSE_SUCCESS);
}
static nisplus_backend_op_t pw_ops[] = {
_nss_nisplus_destr,
_nss_nisplus_endent,
_nss_nisplus_setent,
_nss_nisplus_getent,
getbynam,
getbyuid
};
/*ARGSUSED*/
nss_backend_t *
_nss_nisplus_passwd_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_nisplus_constr(pw_ops,
sizeof (pw_ops) / sizeof (pw_ops[0]),
PW_TBLNAME, nis_object2ent));
}