usr/src/lib/libc/port/nsl/getuserattr.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "mt.h"
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <limits.h>
  33 #include <sys/types.h>
  34 #include <nss_dbdefs.h>
  35 #include <string.h>
  36 #include <user_attr.h>
  37
  38 /* externs from libc */
  39 extern void _nss_XbyY_fgets(FILE *, nss_XbyY_args_t *);
  40 /* externs from parse.c */
  41 extern char *_strtok_escape(char *, char *, char **);
  42
  43
  44 static int userattr_stayopen;
  45
  46 /*
  47  * Unsynchronized, but it affects only
  48  * efficiency, not correctness
  49  */
  50
  51 static DEFINE_NSS_DB_ROOT(db_root);
  52 static DEFINE_NSS_GETENT(context);
  53
  54
  55 void
  56 _nss_initf_userattr(nss_db_params_t *p)
  57 {
  58         p->name = NSS_DBNAM_USERATTR;
  59         p->config_name    = NSS_DBNAM_PASSWD; /* use config for "passwd" */
  60         p->default_config = NSS_DEFCONF_USERATTR;
  61 }
  62
  63
  64 /*
  65  * Return values: 0 = success, 1 = parse error, 2 = erange ...
  66  * The structure pointer passed in is a structure in the caller's space
  67  * wherein the field pointers would be set to areas in the buffer if
  68  * need be. instring and buffer should be separate areas.
  69  */
  70 int
  71 str2userattr(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
  72 {
  73         char            *last = NULL;
  74         char            *sep = KV_TOKEN_DELIMIT;
  75         userstr_t       *user = (userstr_t *)ent;
  76
  77         if (lenstr >= buflen)
  78                 return (NSS_STR_PARSE_ERANGE);
  79
  80         if (instr != buffer)
  81                 (void) strncpy(buffer, instr, buflen);
  82
  83         /*
  84          * Remove newline that nis (yp_match) puts at the
  85          * end of the entry it retrieves from the map.
  86          */
  87         if (buffer[lenstr] == '\n') {
  88                 buffer[lenstr] = '\0';
  89         }
  90
  91         /* quick exit do not entry fill if not needed */
  92         if (ent == NULL)
  93                 return (NSS_STR_PARSE_SUCCESS);
  94
  95         user->name = _strtok_escape(buffer, sep, &last);
  96         user->qualifier = _strtok_escape(NULL, sep, &last);
  97         user->res1 = _strtok_escape(NULL, sep, &last);
  98         user->res2 = _strtok_escape(NULL, sep, &last);
  99         user->attr = _strtok_escape(NULL, sep, &last);
 100
 101         return (0);
 102 }
 103
 104
 105 void
 106 _setuserattr(void)
 107 {
 108         userattr_stayopen = 0;
 109         nss_setent(&db_root, _nss_initf_userattr, &context);
 110 }
 111
 112
 113 void
 114 _enduserattr(void)
 115 {
 116         userattr_stayopen = 0;
 117         nss_endent(&db_root, _nss_initf_userattr, &context);
 118         nss_delete(&db_root);
 119 }
 120
 121
 122 userstr_t *
 123 _getuserattr(userstr_t *result, char *buffer, int buflen, int *h_errnop)
 124 {
 125         nss_XbyY_args_t arg;
 126         nss_status_t    res;
 127
 128         NSS_XbyY_INIT(&arg, result, buffer, buflen, str2userattr);
 129         res = nss_getent(&db_root, _nss_initf_userattr, &context, &arg);
 130         arg.status = res;
 131         *h_errnop = arg.h_errno;
 132         return ((userstr_t *)NSS_XbyY_FINI(&arg));
 133 }
 134
 135
 136 userstr_t *
 137 _fgetuserattr(FILE *f, userstr_t *result, char *buffer, int buflen)
 138 {
 139         nss_XbyY_args_t arg;
 140
 141         NSS_XbyY_INIT(&arg, result, buffer, buflen, str2userattr);
 142         _nss_XbyY_fgets(f, &arg);
 143         return ((userstr_t *)NSS_XbyY_FINI(&arg));
 144 }
 145
 146
 147
 148 userstr_t *
 149 _getusernam(const char *name, userstr_t *result, char *buffer, int buflen,
 150     int *errnop)
 151 {
 152         nss_XbyY_args_t arg;
 153         nss_status_t    res;
 154
 155         NSS_XbyY_INIT(&arg, result, buffer, buflen, str2userattr);
 156         arg.key.name = name;
 157         arg.stayopen = userattr_stayopen;
 158         res = nss_search(&db_root, _nss_initf_userattr,
 159             NSS_DBOP_USERATTR_BYNAME, &arg);
 160         arg.status = res;
 161         *errnop = arg.h_errno;
 162         return ((userstr_t *)NSS_XbyY_FINI(&arg));
 163 }