usr.sbin/rpc.pcnfsd/pcnfsd_cache.c

   1 /*      $NetBSD: pcnfsd_cache.c,v 1.3 1997/10/25 13:45:57 lukem Exp $   */
   2
   3 /* RE_SID: @(%)/usr/dosnfs/shades_SCCS/unix/pcnfsd/v2/src/SCCS/s.pcnfsd_cache.c 1.1 91/09/03 12:45:14 SMI */
   4 /*
   5 **=====================================================================
   6 ** Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc.
   7 **      @(#)pcnfsd_cache.c      1.1     9/3/91
   8 **=====================================================================
   9 */
  10 /*
  11 **=====================================================================
  12 **             I N C L U D E   F I L E   S E C T I O N                *
  13 **                                                                    *
  14 ** If your port requires different include files, add a suitable      *
  15 ** #define in the customization section, and make the inclusion or    *
  16 ** exclusion of the files conditional on this.                        *
  17 **=====================================================================
  18 */
  19
  20 #include <errno.h>
  21 #include <pwd.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #include "common.h"
  27 #include "pcnfsd.h"
  28 #include "extern.h"
  29
  30 /*
  31 **---------------------------------------------------------------------
  32 **                       Misc. variable definitions
  33 **---------------------------------------------------------------------
  34 */
  35
  36 #ifdef USER_CACHE
  37 #define CACHE_SIZE 16           /* keep it small, as linear searches are done */
  38 struct cache {
  39         int     cuid;
  40         int     cgid;
  41         char    cpw[32];
  42         char    cuname[10];     /* keep this even for machines with alignment
  43                                  * problems */
  44 }       User_cache[CACHE_SIZE];
  45
  46
  47 /*
  48 **---------------------------------------------------------------------
  49 **                 User cache support procedures
  50 **---------------------------------------------------------------------
  51 */
  52
  53
  54 int
  55 check_cache(name, pw, p_uid, p_gid)
  56         char   *name;
  57         char   *pw;
  58         int    *p_uid;
  59         int    *p_gid;
  60 {
  61         int     i;
  62         int     c1, c2;
  63
  64         for (i = 0; i < CACHE_SIZE; i++) {
  65                 if (!strcmp(User_cache[i].cuname, name)) {
  66                         c1 = strlen(pw);
  67                         c2 = strlen(User_cache[i].cpw);
  68                         if ((!c1 && !c2) ||
  69                             !(strcmp(User_cache[i].cpw,
  70                                     crypt(pw, User_cache[i].cpw)))) {
  71                                 *p_uid = User_cache[i].cuid;
  72                                 *p_gid = User_cache[i].cgid;
  73                                 return (1);
  74                         }
  75                         User_cache[i].cuname[0] = '\0'; /* nuke entry */
  76                         return (0);
  77                 }
  78         }
  79         return (0);
  80 }
  81
  82 void
  83 add_cache_entry(p)
  84         struct passwd *p;
  85 {
  86         int     i;
  87
  88         for (i = CACHE_SIZE - 1; i > 0; i--)
  89                 User_cache[i] = User_cache[i - 1];
  90         User_cache[0].cuid = p->pw_uid;
  91         User_cache[0].cgid = p->pw_gid;
  92         (void) strlcpy(User_cache[0].cpw, p->pw_passwd,
  93             sizeof(User_cache[0].cpw));
  94         (void) strlcpy(User_cache[0].cuname, p->pw_name,
  95             sizeof(User_cache[0].cuname));
  96 }
  97
  98 #endif                          /* USER_CACHE */