/* $NetBSD: nis_gr.c,v 1.1.1.2 2012/09/09 16:07:51 christos Exp $ */ /* * Copyright (c) 1989, 1993, 1995 * The Regents of the University of California. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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) 2004 by Internet Systems Consortium, Inc. ("ISC") * Portions Copyright (c) 1996-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if defined(LIBC_SCCS) && !defined(lint) static const char rcsid[] = "Id: nis_gr.c,v 1.4 2005/04/27 04:56:32 sra Exp "; /* from getgrent.c 8.2 (Berkeley) 3/21/94"; */ /* from BSDI Id: getgrent.c,v 2.8 1996/05/28 18:15:14 bostic Exp $ */ #endif /* LIBC_SCCS and not lint */ /* Imports */ #include "port_before.h" #if !defined(WANT_IRS_GR) || !defined(WANT_IRS_NIS) static int __bind_irs_gr_unneeded; #else #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "port_after.h" #include "irs_p.h" #include "nis_p.h" /* Definitions */ struct pvt { int needrewind; char * nis_domain; char * curkey_data; int curkey_len; char * curval_data; int curval_len; /*%< * Need space to store the entries read from the group file. * The members list also needs space per member, and the * strings making up the user names must be allocated * somewhere. Rather than doing lots of small allocations, * we keep one buffer and resize it as needed. */ struct group group; size_t nmemb; /*%< Malloc'd max index of gr_mem[]. */ char * membuf; size_t membufsize; }; enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 }; static /*const*/ char group_bygid[] = "group.bygid"; static /*const*/ char group_byname[] = "group.byname"; /* Forward */ static void gr_close(struct irs_gr *); static struct group * gr_next(struct irs_gr *); static struct group * gr_byname(struct irs_gr *, const char *); static struct group * gr_bygid(struct irs_gr *, gid_t); static void gr_rewind(struct irs_gr *); static void gr_minimize(struct irs_gr *); static struct group * makegroupent(struct irs_gr *); static void nisfree(struct pvt *, enum do_what); /* Public */ struct irs_gr * irs_nis_gr(struct irs_acc *this) { struct irs_gr *gr; struct pvt *pvt; if (!(gr = memget(sizeof *gr))) { errno = ENOMEM; return (NULL); } memset(gr, 0x5e, sizeof *gr); if (!(pvt = memget(sizeof *pvt))) { memput(gr, sizeof *gr); errno = ENOMEM; return (NULL); } memset(pvt, 0, sizeof *pvt); pvt->needrewind = 1; pvt->nis_domain = ((struct nis_p *)this->private)->domain; gr->private = pvt; gr->close = gr_close; gr->next = gr_next; gr->byname = gr_byname; gr->bygid = gr_bygid; gr->rewind = gr_rewind; gr->list = make_group_list; gr->minimize = gr_minimize; gr->res_get = NULL; gr->res_set = NULL; return (gr); } /* Methods */ static void gr_close(struct irs_gr *this) { struct pvt *pvt = (struct pvt *)this->private; if (pvt->group.gr_mem) free(pvt->group.gr_mem); if (pvt->membuf) free(pvt->membuf); memput(pvt, sizeof *pvt); memput(this, sizeof *this); } static struct group * gr_next(struct irs_gr *this) { struct pvt *pvt = (struct pvt *)this->private; struct group *rval; int r; do { if (pvt->needrewind) { nisfree(pvt, do_all); r = yp_first(pvt->nis_domain, group_byname, &pvt->curkey_data, &pvt->curkey_len, &pvt->curval_data, &pvt->curval_len); pvt->needrewind = 0; } else { char *newkey_data; int newkey_len; nisfree(pvt, do_val); r = yp_next(pvt->nis_domain, group_byname, pvt->curkey_data, pvt->curkey_len, &newkey_data, &newkey_len, &pvt->curval_data, &pvt->curval_len); nisfree(pvt, do_key); pvt->curkey_data = newkey_data; pvt->curkey_len = newkey_len; } if (r != 0) { errno = ENOENT; return (NULL); } rval = makegroupent(this); } while (rval == NULL); return (rval); } static struct group * gr_byname(struct irs_gr *this, const char *name) { struct pvt *pvt = (struct pvt *)this->private; int r; nisfree(pvt, do_val); r = yp_match(pvt->nis_domain, group_byname, name, strlen(name), &pvt->curval_data, &pvt->curval_len); if (r != 0) { errno = ENOENT; return (NULL); } return (makegroupent(this)); } static struct group * gr_bygid(struct irs_gr *this, gid_t gid) { struct pvt *pvt = (struct pvt *)this->private; char tmp[sizeof "4294967295"]; int r; nisfree(pvt, do_val); (void) sprintf(tmp, "%u", (unsigned int)gid); r = yp_match(pvt->nis_domain, group_bygid, tmp, strlen(tmp), &pvt->curval_data, &pvt->curval_len); if (r != 0) { errno = ENOENT; return (NULL); } return (makegroupent(this)); } static void gr_rewind(struct irs_gr *this) { struct pvt *pvt = (struct pvt *)this->private; pvt->needrewind = 1; } static void gr_minimize(struct irs_gr *this) { UNUSED(this); /* NOOP */ } /* Private */ static struct group * makegroupent(struct irs_gr *this) { struct pvt *pvt = (struct pvt *)this->private; unsigned int num_members = 0; char *cp, **new; u_long t; if (pvt->group.gr_mem) { free(pvt->group.gr_mem); pvt->group.gr_mem = NULL; pvt->nmemb = 0; } if (pvt->membuf) free(pvt->membuf); pvt->membuf = pvt->curval_data; pvt->curval_data = NULL; cp = pvt->membuf; pvt->group.gr_name = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->group.gr_passwd = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; errno = 0; t = strtoul(cp, NULL, 10); if (errno == ERANGE) goto cleanup; pvt->group.gr_gid = (gid_t) t; if (!(cp = strchr(cp, ':'))) goto cleanup; cp++; if (*cp && cp[strlen(cp)-1] == '\n') cp[strlen(cp)-1] = '\0'; /* * Parse the members out. */ while (*cp) { if (num_members+1 >= pvt->nmemb || pvt->group.gr_mem == NULL) { pvt->nmemb += 10; new = realloc(pvt->group.gr_mem, pvt->nmemb * sizeof(char *)); if (new == NULL) goto cleanup; pvt->group.gr_mem = new; } pvt->group.gr_mem[num_members++] = cp; if (!(cp = strchr(cp, ','))) break; *cp++ = '\0'; } if (pvt->group.gr_mem == NULL) { pvt->group.gr_mem = malloc(sizeof(char*)); if (!pvt->group.gr_mem) goto cleanup; pvt->nmemb = 1; } pvt->group.gr_mem[num_members] = NULL; return (&pvt->group); cleanup: if (pvt->group.gr_mem) { free(pvt->group.gr_mem); pvt->group.gr_mem = NULL; pvt->nmemb = 0; } if (pvt->membuf) { free(pvt->membuf); pvt->membuf = NULL; } return (NULL); } static void nisfree(struct pvt *pvt, enum do_what do_what) { if ((do_what & do_key) && pvt->curkey_data) { free(pvt->curkey_data); pvt->curkey_data = NULL; } if ((do_what & do_val) && pvt->curval_data) { free(pvt->curval_data); pvt->curval_data = NULL; } } #endif /* WANT_IRS_GR && WANT_IRS_NIS */ /*! \file */