diff options
Diffstat (limited to 'usr.sbin/makefs/compat/pwcache.c')
| -rw-r--r-- | usr.sbin/makefs/compat/pwcache.c | 616 |
1 files changed, 0 insertions, 616 deletions
diff --git a/usr.sbin/makefs/compat/pwcache.c b/usr.sbin/makefs/compat/pwcache.c deleted file mode 100644 index d0c45c2..0000000 --- a/usr.sbin/makefs/compat/pwcache.c +++ /dev/null @@ -1,616 +0,0 @@ -/* $NetBSD: pwcache.c,v 1.29 2004/06/20 22:20:14 jmc Exp $ */ - -/*- - * Copyright (c) 1992 Keith Muller. - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Keith Muller of the University of California, San Diego. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/*- - * Copyright (c) 2002 The NetBSD Foundation, Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/types.h> -#include <sys/param.h> - -#include <assert.h> -#include <grp.h> -#include <pwd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#ifdef __weak_alias -__weak_alias(user_from_uid,_user_from_uid) -__weak_alias(group_from_gid,_group_from_gid) -__weak_alias(pwcache_userdb,_pwcache_userdb) -__weak_alias(pwcache_groupdb,_pwcache_groupdb) -#endif - -#include "pwcache.h" - -/* - * routines that control user, group, uid and gid caches (for the archive - * member print routine). - * IMPORTANT: - * these routines cache BOTH hits and misses, a major performance improvement - */ - -/* - * function pointers to various name lookup routines. - * these may be changed as necessary. - */ -static int (*_pwcache_setgroupent)(int) = setgroupent; -static void (*_pwcache_endgrent)(void) = endgrent; -static struct group * (*_pwcache_getgrnam)(const char *) = getgrnam; -static struct group * (*_pwcache_getgrgid)(gid_t) = getgrgid; -static int (*_pwcache_setpassent)(int) = setpassent; -static void (*_pwcache_endpwent)(void) = endpwent; -static struct passwd * (*_pwcache_getpwnam)(const char *) = getpwnam; -static struct passwd * (*_pwcache_getpwuid)(uid_t) = getpwuid; - -/* - * internal state - */ -static int pwopn; /* is password file open */ -static int gropn; /* is group file open */ -static UIDC **uidtb; /* uid to name cache */ -static GIDC **gidtb; /* gid to name cache */ -static UIDC **usrtb; /* user name to uid cache */ -static GIDC **grptb; /* group name to gid cache */ - -static int uidtb_fail; /* uidtb_start() failed ? */ -static int gidtb_fail; /* gidtb_start() failed ? */ -static int usrtb_fail; /* usrtb_start() failed ? */ -static int grptb_fail; /* grptb_start() failed ? */ - - -static u_int st_hash(const char *, size_t, int); -static int uidtb_start(void); -static int gidtb_start(void); -static int usrtb_start(void); -static int grptb_start(void); - - -static u_int -st_hash(const char *name, size_t len, int tabsz) -{ - u_int key = 0; - - while (len--) { - key += *name++; - key = (key << 8) | (key >> 24); - } - - return (key % tabsz); -} - -/* - * uidtb_start - * creates an an empty uidtb - * Return: - * 0 if ok, -1 otherwise - */ -static int -uidtb_start(void) -{ - - if (uidtb != NULL) - return (0); - if (uidtb_fail) - return (-1); - if ((uidtb = (UIDC **)calloc(UID_SZ, sizeof(UIDC *))) == NULL) { - ++uidtb_fail; - return (-1); - } - return (0); -} - -/* - * gidtb_start - * creates an an empty gidtb - * Return: - * 0 if ok, -1 otherwise - */ -static int -gidtb_start(void) -{ - - if (gidtb != NULL) - return (0); - if (gidtb_fail) - return (-1); - if ((gidtb = (GIDC **)calloc(GID_SZ, sizeof(GIDC *))) == NULL) { - ++gidtb_fail; - return (-1); - } - return (0); -} - -/* - * usrtb_start - * creates an an empty usrtb - * Return: - * 0 if ok, -1 otherwise - */ -static int -usrtb_start(void) -{ - - if (usrtb != NULL) - return (0); - if (usrtb_fail) - return (-1); - if ((usrtb = (UIDC **)calloc(UNM_SZ, sizeof(UIDC *))) == NULL) { - ++usrtb_fail; - return (-1); - } - return (0); -} - -/* - * grptb_start - * creates an an empty grptb - * Return: - * 0 if ok, -1 otherwise - */ -static int -grptb_start(void) -{ - - if (grptb != NULL) - return (0); - if (grptb_fail) - return (-1); - if ((grptb = (GIDC **)calloc(GNM_SZ, sizeof(GIDC *))) == NULL) { - ++grptb_fail; - return (-1); - } - return (0); -} - -/* - * user_from_uid() - * caches the name (if any) for the uid. If noname clear, we always - * return the stored name (if valid or invalid match). - * We use a simple hash table. - * Return - * Pointer to stored name (or a empty string) - */ -const char * -user_from_uid(uid_t uid, int noname) -{ - struct passwd *pw; - UIDC *ptr, **pptr; - - if ((uidtb == NULL) && (uidtb_start() < 0)) - return (NULL); - - /* - * see if we have this uid cached - */ - pptr = uidtb + (uid % UID_SZ); - ptr = *pptr; - - if ((ptr != NULL) && (ptr->valid > 0) && (ptr->uid == uid)) { - /* - * have an entry for this uid - */ - if (!noname || (ptr->valid == VALID)) - return (ptr->name); - return (NULL); - } - - /* - * No entry for this uid, we will add it - */ - if (!pwopn) { - if (_pwcache_setpassent != NULL) - (*_pwcache_setpassent)(1); - ++pwopn; - } - - if (ptr == NULL) - *pptr = ptr = (UIDC *)malloc(sizeof(UIDC)); - - if ((pw = (*_pwcache_getpwuid)(uid)) == NULL) { - /* - * no match for this uid in the local password file - * a string that is the uid in numeric format - */ - if (ptr == NULL) - return (NULL); - ptr->uid = uid; - (void)snprintf(ptr->name, UNMLEN, "%lu", (long) uid); - ptr->valid = INVALID; - if (noname) - return (NULL); - } else { - /* - * there is an entry for this uid in the password file - */ - if (ptr == NULL) - return (pw->pw_name); - ptr->uid = uid; - (void)strlcpy(ptr->name, pw->pw_name, UNMLEN); - ptr->valid = VALID; - } - return (ptr->name); -} - -/* - * group_from_gid() - * caches the name (if any) for the gid. If noname clear, we always - * return the stored name (if valid or invalid match). - * We use a simple hash table. - * Return - * Pointer to stored name (or a empty string) - */ -const char * -group_from_gid(gid_t gid, int noname) -{ - struct group *gr; - GIDC *ptr, **pptr; - - if ((gidtb == NULL) && (gidtb_start() < 0)) - return (NULL); - - /* - * see if we have this gid cached - */ - pptr = gidtb + (gid % GID_SZ); - ptr = *pptr; - - if ((ptr != NULL) && (ptr->valid > 0) && (ptr->gid == gid)) { - /* - * have an entry for this gid - */ - if (!noname || (ptr->valid == VALID)) - return (ptr->name); - return (NULL); - } - - /* - * No entry for this gid, we will add it - */ - if (!gropn) { - if (_pwcache_setgroupent != NULL) - (*_pwcache_setgroupent)(1); - ++gropn; - } - - if (ptr == NULL) - *pptr = ptr = (GIDC *)malloc(sizeof(GIDC)); - - if ((gr = (*_pwcache_getgrgid)(gid)) == NULL) { - /* - * no match for this gid in the local group file, put in - * a string that is the gid in numberic format - */ - if (ptr == NULL) - return (NULL); - ptr->gid = gid; - (void)snprintf(ptr->name, GNMLEN, "%lu", (long) gid); - ptr->valid = INVALID; - if (noname) - return (NULL); - } else { - /* - * there is an entry for this group in the group file - */ - if (ptr == NULL) - return (gr->gr_name); - ptr->gid = gid; - (void)strlcpy(ptr->name, gr->gr_name, GNMLEN); - ptr->valid = VALID; - } - return (ptr->name); -} - -/* - * uid_from_user() - * caches the uid for a given user name. We use a simple hash table. - * Return - * the uid (if any) for a user name, or a -1 if no match can be found - */ -int -uid_from_user(const char *name, uid_t *uid) -{ - struct passwd *pw; - UIDC *ptr, **pptr; - size_t namelen; - - /* - * return -1 for mangled names - */ - if (name == NULL || ((namelen = strlen(name)) == 0)) - return (-1); - if ((usrtb == NULL) && (usrtb_start() < 0)) - return (-1); - - /* - * look up in hash table, if found and valid return the uid, - * if found and invalid, return a -1 - */ - pptr = usrtb + st_hash(name, namelen, UNM_SZ); - ptr = *pptr; - - if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) { - if (ptr->valid == INVALID) - return (-1); - *uid = ptr->uid; - return (0); - } - - if (!pwopn) { - if (_pwcache_setpassent != NULL) - (*_pwcache_setpassent)(1); - ++pwopn; - } - - if (ptr == NULL) - *pptr = ptr = (UIDC *)malloc(sizeof(UIDC)); - - /* - * no match, look it up, if no match store it as an invalid entry, - * or store the matching uid - */ - if (ptr == NULL) { - if ((pw = (*_pwcache_getpwnam)(name)) == NULL) - return (-1); - *uid = pw->pw_uid; - return (0); - } - (void)strlcpy(ptr->name, name, UNMLEN); - if ((pw = (*_pwcache_getpwnam)(name)) == NULL) { - ptr->valid = INVALID; - return (-1); - } - ptr->valid = VALID; - *uid = ptr->uid = pw->pw_uid; - return (0); -} - -/* - * gid_from_group() - * caches the gid for a given group name. We use a simple hash table. - * Return - * the gid (if any) for a group name, or a -1 if no match can be found - */ -int -gid_from_group(const char *name, gid_t *gid) -{ - struct group *gr; - GIDC *ptr, **pptr; - size_t namelen; - - /* - * return -1 for mangled names - */ - if (name == NULL || ((namelen = strlen(name)) == 0)) - return (-1); - if ((grptb == NULL) && (grptb_start() < 0)) - return (-1); - - /* - * look up in hash table, if found and valid return the uid, - * if found and invalid, return a -1 - */ - pptr = grptb + st_hash(name, namelen, GID_SZ); - ptr = *pptr; - - if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) { - if (ptr->valid == INVALID) - return (-1); - *gid = ptr->gid; - return (0); - } - - if (!gropn) { - if (_pwcache_setgroupent != NULL) - (*_pwcache_setgroupent)(1); - ++gropn; - } - - if (ptr == NULL) - *pptr = ptr = (GIDC *)malloc(sizeof(GIDC)); - - /* - * no match, look it up, if no match store it as an invalid entry, - * or store the matching gid - */ - if (ptr == NULL) { - if ((gr = (*_pwcache_getgrnam)(name)) == NULL) - return (-1); - *gid = gr->gr_gid; - return (0); - } - - (void)strlcpy(ptr->name, name, GNMLEN); - if ((gr = (*_pwcache_getgrnam)(name)) == NULL) { - ptr->valid = INVALID; - return (-1); - } - ptr->valid = VALID; - *gid = ptr->gid = gr->gr_gid; - return (0); -} - -#define FLUSHTB(arr, len, fail) \ - do { \ - if (arr != NULL) { \ - for (i = 0; i < len; i++) \ - if (arr[i] != NULL) \ - free(arr[i]); \ - arr = NULL; \ - } \ - fail = 0; \ - } while (/* CONSTCOND */0); - -int -pwcache_userdb( - int (*a_setpassent)(int), - void (*a_endpwent)(void), - struct passwd * (*a_getpwnam)(const char *), - struct passwd * (*a_getpwuid)(uid_t)) -{ - int i; - - /* a_setpassent and a_endpwent may be NULL */ - if (a_getpwnam == NULL || a_getpwuid == NULL) - return (-1); - - if (_pwcache_endpwent != NULL) - (*_pwcache_endpwent)(); - FLUSHTB(uidtb, UID_SZ, uidtb_fail); - FLUSHTB(usrtb, UNM_SZ, usrtb_fail); - pwopn = 0; - _pwcache_setpassent = a_setpassent; - _pwcache_endpwent = a_endpwent; - _pwcache_getpwnam = a_getpwnam; - _pwcache_getpwuid = a_getpwuid; - - return (0); -} - -int -pwcache_groupdb( - int (*a_setgroupent)(int), - void (*a_endgrent)(void), - struct group * (*a_getgrnam)(const char *), - struct group * (*a_getgrgid)(gid_t)) -{ - int i; - - /* a_setgroupent and a_endgrent may be NULL */ - if (a_getgrnam == NULL || a_getgrgid == NULL) - return (-1); - - if (_pwcache_endgrent != NULL) - (*_pwcache_endgrent)(); - FLUSHTB(gidtb, GID_SZ, gidtb_fail); - FLUSHTB(grptb, GNM_SZ, grptb_fail); - gropn = 0; - _pwcache_setgroupent = a_setgroupent; - _pwcache_endgrent = a_endgrent; - _pwcache_getgrnam = a_getgrnam; - _pwcache_getgrgid = a_getgrgid; - - return (0); -} - - -#ifdef TEST_PWCACHE - -struct passwd * -test_getpwnam(const char *name) -{ - static struct passwd foo; - - memset(&foo, 0, sizeof(foo)); - if (strcmp(name, "toor") == 0) { - foo.pw_uid = 666; - return &foo; - } - return (getpwnam(name)); -} - -int -main(int argc, char *argv[]) -{ - uid_t u; - int r, i; - - printf("pass 1 (default userdb)\n"); - for (i = 1; i < argc; i++) { - printf("i: %d, pwopn %d usrtb_fail %d usrtb %p\n", - i, pwopn, usrtb_fail, usrtb); - r = uid_from_user(argv[i], &u); - if (r == -1) - printf(" uid_from_user %s: failed\n", argv[i]); - else - printf(" uid_from_user %s: %d\n", argv[i], u); - } - printf("pass 1 finish: pwopn %d usrtb_fail %d usrtb %p\n", - pwopn, usrtb_fail, usrtb); - - puts(""); - printf("pass 2 (replacement userdb)\n"); - printf("pwcache_userdb returned %d\n", - pwcache_userdb(setpassent, test_getpwnam, getpwuid)); - printf("pwopn %d usrtb_fail %d usrtb %p\n", pwopn, usrtb_fail, usrtb); - - for (i = 1; i < argc; i++) { - printf("i: %d, pwopn %d usrtb_fail %d usrtb %p\n", - i, pwopn, usrtb_fail, usrtb); - u = -1; - r = uid_from_user(argv[i], &u); - if (r == -1) - printf(" uid_from_user %s: failed\n", argv[i]); - else - printf(" uid_from_user %s: %d\n", argv[i], u); - } - printf("pass 2 finish: pwopn %d usrtb_fail %d usrtb %p\n", - pwopn, usrtb_fail, usrtb); - - puts(""); - printf("pass 3 (null pointers)\n"); - printf("pwcache_userdb returned %d\n", - pwcache_userdb(NULL, NULL, NULL)); - - return (0); -} -#endif /* TEST_PWCACHE */ |
