/* $NetBSD: pcnfsd_cache.c,v 1.5 2018/01/23 21:06:25 sevan Exp $ */ /* RE_SID: @(%)/usr/dosnfs/shades_SCCS/unix/pcnfsd/v2/src/SCCS/s.pcnfsd_cache.c 1.1 91/09/03 12:45:14 SMI */ /* **===================================================================== ** Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc. ** @(#)pcnfsd_cache.c 1.1 9/3/91 **===================================================================== */ /* **===================================================================== ** I N C L U D E F I L E S E C T I O N * ** * ** If your port requires different include files, add a suitable * ** #define in the customization section, and make the inclusion or * ** exclusion of the files conditional on this. * **===================================================================== */ #include <errno.h> #include <pwd.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include "common.h" #include "pcnfsd.h" #include "extern.h" /* **--------------------------------------------------------------------- ** Misc. variable definitions **--------------------------------------------------------------------- */ #ifdef USER_CACHE #define CACHE_SIZE 16 /* keep it small, as linear searches are done */ struct cache { int cuid; int cgid; char cpw[32]; char cuname[10]; /* keep this even for machines with alignment * problems */ } User_cache[CACHE_SIZE]; /* **--------------------------------------------------------------------- ** User cache support procedures **--------------------------------------------------------------------- */ int check_cache(char *name, char *pw, int *p_uid, int *p_gid) { int i; int c1, c2; for (i = 0; i < CACHE_SIZE; i++) { if (!strcmp(User_cache[i].cuname, name)) { c1 = strlen(pw); c2 = strlen(User_cache[i].cpw); if ((!c1 && !c2) || !(strcmp(User_cache[i].cpw, crypt(pw, User_cache[i].cpw)))) { *p_uid = User_cache[i].cuid; *p_gid = User_cache[i].cgid; return (1); } User_cache[i].cuname[0] = '\0'; /* nuke entry */ return (0); } } return (0); } void add_cache_entry(struct passwd *p) { int i; for (i = CACHE_SIZE - 1; i > 0; i--) User_cache[i] = User_cache[i - 1]; User_cache[0].cuid = p->pw_uid; User_cache[0].cgid = p->pw_gid; (void) strlcpy(User_cache[0].cpw, p->pw_passwd, sizeof(User_cache[0].cpw)); (void) strlcpy(User_cache[0].cuname, p->pw_name, sizeof(User_cache[0].cuname)); } #endif /* USER_CACHE */ |