usr/src/cmd/nscd/getexec.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  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 /*
  29  * Routines to handle getexec* calls in nscd
  30  */
  31
  32 #include <string.h>
  33 #include <exec_attr.h>
  34 #include "cache.h"
  35
  36 static int execattr_compar(const void *, const void *);
  37 static uint_t execattr_gethash(nss_XbyY_key_t *, int);
  38 static void execattr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
  39
  40 #define nam_db          ctx->nsc_db[0]
  41 #define id_db           ctx->nsc_db[1]
  42 #define nam_id_db       ctx->nsc_db[2]
  43 #define NSC_NAME_EXECATTR_BYNAME        "execattr_byname"
  44 #define NSC_NAME_EXECATTR_BYID          "execattr_byid"
  45 #define NSC_NAME_EXECATTR_BYNAMEID      "execattr_bynameid"
  46
  47 void
  48 exec_init_ctx(nsc_ctx_t *ctx) {
  49         ctx->dbname = NSS_DBNAM_EXECATTR;
  50         ctx->file_name = "/etc/security/exec_attr";
  51         ctx->db_count = 3;
  52         nam_db = make_cache(nsc_key_other,
  53                         NSS_DBOP_EXECATTR_BYNAME,
  54                         NSC_NAME_EXECATTR_BYNAME,
  55                         execattr_compar,
  56                         execattr_getlogstr,
  57                         execattr_gethash, nsc_ht_default, -1);
  58         id_db = make_cache(nsc_key_other,
  59                         NSS_DBOP_EXECATTR_BYID,
  60                         NSC_NAME_EXECATTR_BYID,
  61                         execattr_compar,
  62                         execattr_getlogstr,
  63                         execattr_gethash, nsc_ht_default, -1);
  64         nam_id_db = make_cache(nsc_key_other,
  65                         NSS_DBOP_EXECATTR_BYNAMEID,
  66                         NSC_NAME_EXECATTR_BYNAMEID,
  67                         execattr_compar,
  68                         execattr_getlogstr,
  69                         execattr_gethash, nsc_ht_default, -1);
  70 }
  71
  72 #define EXEC_STR_CMP(s1, s2) \
  73         if ((a = s1) == NULL) \
  74                 a = z; \
  75         if ((b = s2) == NULL) \
  76                 b = z; \
  77         res = strcmp(a, b); \
  78         if (res != 0) \
  79                 return (res > 0 ? 1 : -1);
  80
  81 static int
  82 execattr_compar(const void *n1, const void *n2) {
  83         nsc_entry_t     *e1 = (nsc_entry_t *)n1;
  84         nsc_entry_t     *e2 = (nsc_entry_t *)n2;
  85         _priv_execattr  *ep1 = (_priv_execattr *)e1->key.attrp;
  86         _priv_execattr  *ep2 = (_priv_execattr *)e2->key.attrp;
  87         int             res;
  88         const char      *a, *b, *z = "";
  89
  90         /* compare name */
  91         EXEC_STR_CMP(ep1->name, ep2->name);
  92
  93         /* compare policy */
  94         EXEC_STR_CMP(ep1->policy, ep2->policy);
  95
  96         /* compare type */
  97         EXEC_STR_CMP(ep1->type, ep2->type);
  98
  99         /* compare id */
 100         EXEC_STR_CMP(ep1->id, ep2->id);
 101
 102         /* compare search flag */
 103         return (_NSC_INT_KEY_CMP(ep1->search_flag, ep2->search_flag));
 104 }
 105
 106 static uint_t
 107 execattr_gethash(nss_XbyY_key_t *key, int htsize) {
 108         _priv_execattr  *ep = key->attrp;
 109         char            keys[1024];
 110         int             len;
 111
 112         len = snprintf(keys, sizeof (keys), "%s:%s:%s:%s:%d",
 113                 ep->name ? ep->name : "", ep->type ? ep->type : "",
 114                 ep->id ? ep->id : "", ep->policy ? ep->policy : "",
 115                 ep->search_flag);
 116         return (db_gethash(keys, len, htsize));
 117 }
 118
 119 static void
 120 execattr_getlogstr(char *name, char *whoami, size_t len,
 121         nss_XbyY_args_t *argp) {
 122         _priv_execattr  *ep = argp->key.attrp;
 123
 124         (void) snprintf(whoami, len,
 125                 "%s [name=%s:type=%s:id=%s:policy=%s:flags=%d]",
 126                 name, check_null(ep->name), check_null(ep->type),
 127                 check_null(ep->id), check_null(ep->policy),
 128                 ep->search_flag);
 129 }