8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
326 lines
7.3 KiB
C
326 lines
7.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* netname utility routines convert from unix names to network names and
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* vice-versa This module is operating system dependent! What we define here
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* will work with any unix system that has adopted the sun NIS domain
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* architecture.
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*/
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#include "namespace.h"
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#include <sys/param.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#ifdef YP
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#include <grp.h>
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#include <pwd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "un-namespace.h"
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static char *OPSYS = "unix";
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#ifdef YP
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static char *NETID = "netid.byname";
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#endif
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static char *NETIDFILE = "/etc/netid";
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static int getnetid( char *, char * );
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static int _getgroups( char *, gid_t * );
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/*
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* Convert network-name into unix credential
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*/
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int
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netname2user(char netname[MAXNETNAMELEN + 1], uid_t *uidp, gid_t *gidp,
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int *gidlenp, gid_t *gidlist)
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{
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char *p;
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int gidlen;
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uid_t uid;
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long luid;
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struct passwd *pwd;
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char val[1024];
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char *val1, *val2;
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char *domain;
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int vallen;
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int err;
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if (getnetid(netname, val)) {
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char *res = val;
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p = strsep(&res, ":");
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if (p == NULL)
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return (0);
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*uidp = (uid_t) atol(p);
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p = strsep(&res, "\n,");
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if (p == NULL) {
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return (0);
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}
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*gidp = (gid_t) atol(p);
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for (gidlen = 0; gidlen < NGRPS; gidlen++) {
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p = strsep(&res, "\n,");
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if (p == NULL)
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break;
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gidlist[gidlen] = (gid_t) atol(p);
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}
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*gidlenp = gidlen;
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return (1);
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}
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val1 = strchr(netname, '.');
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if (val1 == NULL)
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return (0);
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if (strncmp(netname, OPSYS, (val1-netname)))
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return (0);
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val1++;
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val2 = strchr(val1, '@');
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if (val2 == NULL)
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return (0);
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vallen = val2 - val1;
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if (vallen > (1024 - 1))
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vallen = 1024 - 1;
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(void) strncpy(val, val1, 1024);
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val[vallen] = 0;
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err = __rpc_get_default_domain(&domain); /* change to rpc */
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if (err)
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return (0);
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if (strcmp(val2 + 1, domain))
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return (0); /* wrong domain */
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if (sscanf(val, "%ld", &luid) != 1)
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return (0);
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uid = luid;
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/* use initgroups method */
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pwd = getpwuid(uid);
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if (pwd == NULL)
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return (0);
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*uidp = pwd->pw_uid;
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*gidp = pwd->pw_gid;
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*gidlenp = _getgroups(pwd->pw_name, gidlist);
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return (1);
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}
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/*
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* initgroups
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*/
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static int
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_getgroups(char *uname, gid_t groups[NGRPS])
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{
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gid_t ngroups = 0;
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struct group *grp;
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int i;
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int j;
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int filter;
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setgrent();
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while ((grp = getgrent())) {
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for (i = 0; grp->gr_mem[i]; i++)
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if (!strcmp(grp->gr_mem[i], uname)) {
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if (ngroups == NGRPS) {
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#ifdef DEBUG
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fprintf(stderr,
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"initgroups: %s is in too many groups\n", uname);
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#endif
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goto toomany;
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}
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/* filter out duplicate group entries */
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filter = 0;
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for (j = 0; j < ngroups; j++)
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if (groups[j] == grp->gr_gid) {
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filter++;
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break;
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}
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if (!filter)
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groups[ngroups++] = grp->gr_gid;
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}
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}
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toomany:
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endgrent();
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return (ngroups);
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}
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/*
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* Convert network-name to hostname
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*/
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int
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netname2host(char netname[MAXNETNAMELEN + 1], char *hostname, int hostlen)
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{
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int err;
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char valbuf[1024];
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char *val;
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char *val2;
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int vallen;
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char *domain;
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if (getnetid(netname, valbuf)) {
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val = valbuf;
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if ((*val == '0') && (val[1] == ':')) {
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(void) strncpy(hostname, val + 2, hostlen);
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return (1);
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}
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}
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val = strchr(netname, '.');
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if (val == NULL)
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return (0);
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if (strncmp(netname, OPSYS, (val - netname)))
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return (0);
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val++;
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val2 = strchr(val, '@');
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if (val2 == NULL)
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return (0);
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vallen = val2 - val;
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if (vallen > (hostlen - 1))
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vallen = hostlen - 1;
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(void) strncpy(hostname, val, vallen);
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hostname[vallen] = 0;
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err = __rpc_get_default_domain(&domain); /* change to rpc */
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if (err)
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return (0);
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if (strcmp(val2 + 1, domain))
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return (0); /* wrong domain */
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else
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return (1);
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}
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/*
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* reads the file /etc/netid looking for a + to optionally go to the
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* network information service.
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*/
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int
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getnetid(char *key, char *ret)
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{
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char buf[1024]; /* big enough */
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char *res;
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char *mkey;
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char *mval;
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FILE *fd;
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#ifdef YP
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char *domain;
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int err;
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char *lookup;
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int len;
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#endif
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int rv;
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rv = 0;
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fd = fopen(NETIDFILE, "r");
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if (fd == NULL) {
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#ifdef YP
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res = "+";
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goto getnetidyp;
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#else
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return (0);
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#endif
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}
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while (fd != NULL) {
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res = fgets(buf, sizeof(buf), fd);
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if (res == NULL) {
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rv = 0;
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goto done;
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}
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if (res[0] == '#')
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continue;
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else if (res[0] == '+') {
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#ifdef YP
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getnetidyp:
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err = yp_get_default_domain(&domain);
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if (err) {
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continue;
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}
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lookup = NULL;
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err = yp_match(domain, NETID, key,
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strlen(key), &lookup, &len);
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if (err) {
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#ifdef DEBUG
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fprintf(stderr, "match failed error %d\n", err);
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#endif
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continue;
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}
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lookup[len] = 0;
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strcpy(ret, lookup);
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free(lookup);
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rv = 2;
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goto done;
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#else /* YP */
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#ifdef DEBUG
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fprintf(stderr,
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"Bad record in %s '+' -- NIS not supported in this library copy\n",
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NETIDFILE);
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#endif
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continue;
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#endif /* YP */
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} else {
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mkey = strsep(&res, "\t ");
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if (mkey == NULL) {
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fprintf(stderr,
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"Bad record in %s -- %s", NETIDFILE, buf);
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continue;
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}
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do {
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mval = strsep(&res, " \t#\n");
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} while (mval != NULL && !*mval);
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if (mval == NULL) {
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fprintf(stderr,
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"Bad record in %s val problem - %s", NETIDFILE, buf);
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continue;
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}
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if (strcmp(mkey, key) == 0) {
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strcpy(ret, mval);
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rv = 1;
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goto done;
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}
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}
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}
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done:
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if (fd != NULL)
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fclose(fd);
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return (rv);
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}
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