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pcnfsd_cache.c revision 1.1 
      1 /* RE_SID: @(%)/usr/dosnfs/shades_SCCS/unix/pcnfsd/v2/src/SCCS/s.pcnfsd_cache.c 1.1 91/09/03 12:45:14 SMI */
      2 /*
      3 **=====================================================================
      4 ** Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc.
      5 **	@(#)pcnfsd_cache.c	1.1	9/3/91
      6 **=====================================================================
      7 */
      8 #include "common.h"
      9 /*
     10 **=====================================================================
     11 **             I N C L U D E   F I L E   S E C T I O N                *
     12 **                                                                    *
     13 ** If your port requires different include files, add a suitable      *
     14 ** #define in the customization section, and make the inclusion or    *
     15 ** exclusion of the files conditional on this.                        *
     16 **=====================================================================
     17 */
     18 #include "pcnfsd.h"
     19 
     20 #include <stdio.h>
     21 #include <pwd.h>
     22 #include <errno.h>
     23 #include <string.h>
     24 
     25 extern char    *crypt();
     26 
     27 
     28 /*
     29 **---------------------------------------------------------------------
     30 **                       Misc. variable definitions
     31 **---------------------------------------------------------------------
     32 */
     33 
     34 extern int      errno;
     35 
     36 #ifdef USER_CACHE
     37 #define CACHE_SIZE 16		/* keep it small, as linear searches are
     38 				 * done */
     39 struct cache
     40        {
     41        int   cuid;
     42        int   cgid;
     43        char  cpw[32];
     44        char  cuname[10];	/* keep this even for machines
     45 				 * with alignment problems */
     46        }User_cache[CACHE_SIZE];
     47 
     48 
     49 
     50 /*
     51 **---------------------------------------------------------------------
     52 **                 User cache support procedures
     53 **---------------------------------------------------------------------
     54 */
     55 
     56 
     57 int
     58 check_cache(name, pw, p_uid, p_gid)
     59 	char           *name;
     60    char           *pw;
     61    int            *p_uid;
     62    int            *p_gid;
     63 {
     64 	int             i;
     65    int             c1, c2;
     66 
     67 	for (i = 0; i < CACHE_SIZE; i++) {
     68 		if (!strcmp(User_cache[i].cuname, name)) {
     69            		c1 = strlen(pw);
     70 	       		c2 = strlen(User_cache[i].cpw);
     71 	        	if ((!c1 && !c2) ||
     72 	  	       	    !(strcmp(User_cache[i].cpw,
     73 		       	           crypt(pw, User_cache[i].cpw)))) {
     74 		        	*p_uid = User_cache[i].cuid;
     75 		        	*p_gid = User_cache[i].cgid;
     76 		        	return (1);
     77 		    	}
     78 		    	User_cache[i].cuname[0] = '\0'; /* nuke entry */
     79            		return (0);
     80        		}
     81 	}
     82 	return (0);
     83 }
     84 
     85 void
     86 add_cache_entry(p)
     87 	struct passwd  *p;
     88 {
     89 	int             i;
     90 
     91 	for (i = CACHE_SIZE - 1; i > 0; i--)
     92 		User_cache[i] = User_cache[i - 1];
     93 	User_cache[0].cuid = p->pw_uid;
     94 	User_cache[0].cgid = p->pw_gid;
     95 	(void)strcpy(User_cache[0].cpw, p->pw_passwd);
     96 	(void)strcpy(User_cache[0].cuname, p->pw_name);
     97 }
     98 
     99 
    100 #endif				/* USER_CACHE */
    101 
    102 
    103