1 /* $NetBSD: pcnfsd_cache.c,v 1.5 2018/01/23 21:06:25 sevan 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
check_cache(char * name,char * pw,int * p_uid,int * p_gid)55 check_cache(char *name, char *pw, int *p_uid, int *p_gid)
56 {
57 int i;
58 int c1, c2;
59
60 for (i = 0; i < CACHE_SIZE; i++) {
61 if (!strcmp(User_cache[i].cuname, name)) {
62 c1 = strlen(pw);
63 c2 = strlen(User_cache[i].cpw);
64 if ((!c1 && !c2) ||
65 !(strcmp(User_cache[i].cpw,
66 crypt(pw, User_cache[i].cpw)))) {
67 *p_uid = User_cache[i].cuid;
68 *p_gid = User_cache[i].cgid;
69 return (1);
70 }
71 User_cache[i].cuname[0] = '\0'; /* nuke entry */
72 return (0);
73 }
74 }
75 return (0);
76 }
77
78 void
add_cache_entry(struct passwd * p)79 add_cache_entry(struct passwd *p)
80 {
81 int i;
82
83 for (i = CACHE_SIZE - 1; i > 0; i--)
84 User_cache[i] = User_cache[i - 1];
85 User_cache[0].cuid = p->pw_uid;
86 User_cache[0].cgid = p->pw_gid;
87 (void) strlcpy(User_cache[0].cpw, p->pw_passwd,
88 sizeof(User_cache[0].cpw));
89 (void) strlcpy(User_cache[0].cuname, p->pw_name,
90 sizeof(User_cache[0].cuname));
91 }
92
93 #endif /* USER_CACHE */
94