| 1 | #include <machine/rtems-bsd-user-space.h> |
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| 2 | |
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| 3 | /*- |
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| 4 | * SPDX-License-Identifier: BSD-3-Clause |
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| 5 | * |
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| 6 | * Copyright (c) 2009, Sun Microsystems, Inc. |
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| 7 | * All rights reserved. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions are met: |
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| 11 | * - Redistributions of source code must retain the above copyright notice, |
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| 12 | * this list of conditions and the following disclaimer. |
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| 13 | * - Redistributions in binary form must reproduce the above copyright notice, |
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| 14 | * this list of conditions and the following disclaimer in the documentation |
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| 15 | * and/or other materials provided with the distribution. |
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| 16 | * - Neither the name of Sun Microsystems, Inc. nor the names of its |
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| 17 | * contributors may be used to endorse or promote products derived |
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| 18 | * from this software without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| 24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 30 | * POSSIBILITY OF SUCH DAMAGE. |
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| 31 | */ |
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| 32 | |
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| 33 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 34 | static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro"; |
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| 35 | #endif |
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| 36 | #include <sys/cdefs.h> |
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| 37 | __FBSDID("$FreeBSD$"); |
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| 38 | |
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| 39 | /* |
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| 40 | * netname utility routines convert from unix names to network names and |
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| 41 | * vice-versa This module is operating system dependent! What we define here |
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| 42 | * will work with any unix system that has adopted the sun NIS domain |
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| 43 | * architecture. |
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| 44 | */ |
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| 45 | #include "namespace.h" |
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| 46 | #include <sys/param.h> |
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| 47 | #include <rpc/rpc.h> |
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| 48 | #include <rpc/rpc_com.h> |
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| 49 | #ifdef YP |
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| 50 | #include <rpcsvc/yp_prot.h> |
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| 51 | #include <rpcsvc/ypclnt.h> |
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| 52 | #endif |
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| 53 | #include <ctype.h> |
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| 54 | #include <stdio.h> |
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| 55 | #include <grp.h> |
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| 56 | #include <pwd.h> |
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| 57 | #include <string.h> |
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| 58 | #include <stdlib.h> |
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| 59 | #include <unistd.h> |
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| 60 | #include "un-namespace.h" |
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| 61 | |
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| 62 | static char *OPSYS = "unix"; |
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| 63 | #ifdef YP |
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| 64 | static char *NETID = "netid.byname"; |
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| 65 | #endif |
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| 66 | static char *NETIDFILE = "/etc/netid"; |
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| 67 | |
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| 68 | static int getnetid( char *, char * ); |
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| 69 | static int _getgroups( char *, gid_t * ); |
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| 70 | |
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| 71 | /* |
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| 72 | * Convert network-name into unix credential |
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| 73 | */ |
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| 74 | int |
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| 75 | netname2user(char netname[MAXNETNAMELEN + 1], uid_t *uidp, gid_t *gidp, |
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| 76 | int *gidlenp, gid_t *gidlist) |
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| 77 | { |
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| 78 | char *p; |
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| 79 | int gidlen; |
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| 80 | uid_t uid; |
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| 81 | long luid; |
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| 82 | struct passwd *pwd; |
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| 83 | char val[1024]; |
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| 84 | char *val1, *val2; |
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| 85 | char *domain; |
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| 86 | int vallen; |
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| 87 | int err; |
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| 88 | |
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| 89 | if (getnetid(netname, val)) { |
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| 90 | char *res = val; |
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| 91 | |
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| 92 | p = strsep(&res, ":"); |
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| 93 | if (p == NULL) |
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| 94 | return (0); |
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| 95 | *uidp = (uid_t) atol(p); |
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| 96 | p = strsep(&res, "\n,"); |
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| 97 | if (p == NULL) { |
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| 98 | return (0); |
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| 99 | } |
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| 100 | *gidp = (gid_t) atol(p); |
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| 101 | for (gidlen = 0; gidlen < NGRPS; gidlen++) { |
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| 102 | p = strsep(&res, "\n,"); |
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| 103 | if (p == NULL) |
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| 104 | break; |
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| 105 | gidlist[gidlen] = (gid_t) atol(p); |
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| 106 | } |
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| 107 | *gidlenp = gidlen; |
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| 108 | |
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| 109 | return (1); |
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| 110 | } |
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| 111 | val1 = strchr(netname, '.'); |
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| 112 | if (val1 == NULL) |
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| 113 | return (0); |
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| 114 | if (strncmp(netname, OPSYS, (val1-netname))) |
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| 115 | return (0); |
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| 116 | val1++; |
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| 117 | val2 = strchr(val1, '@'); |
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| 118 | if (val2 == NULL) |
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| 119 | return (0); |
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| 120 | vallen = val2 - val1; |
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| 121 | if (vallen > (1024 - 1)) |
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| 122 | vallen = 1024 - 1; |
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| 123 | (void) strncpy(val, val1, 1024); |
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| 124 | val[vallen] = 0; |
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| 125 | |
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| 126 | err = __rpc_get_default_domain(&domain); /* change to rpc */ |
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| 127 | if (err) |
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| 128 | return (0); |
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| 129 | |
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| 130 | if (strcmp(val2 + 1, domain)) |
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| 131 | return (0); /* wrong domain */ |
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| 132 | |
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| 133 | if (sscanf(val, "%ld", &luid) != 1) |
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| 134 | return (0); |
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| 135 | uid = luid; |
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| 136 | |
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| 137 | /* use initgroups method */ |
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| 138 | pwd = getpwuid(uid); |
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| 139 | if (pwd == NULL) |
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| 140 | return (0); |
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| 141 | *uidp = pwd->pw_uid; |
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| 142 | *gidp = pwd->pw_gid; |
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| 143 | *gidlenp = _getgroups(pwd->pw_name, gidlist); |
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| 144 | return (1); |
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| 145 | } |
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| 146 | |
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| 147 | /* |
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| 148 | * initgroups |
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| 149 | */ |
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| 150 | |
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| 151 | static int |
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| 152 | _getgroups(char *uname, gid_t groups[NGRPS]) |
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| 153 | { |
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| 154 | gid_t ngroups = 0; |
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| 155 | struct group *grp; |
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| 156 | int i; |
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| 157 | int j; |
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| 158 | int filter; |
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| 159 | |
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| 160 | setgrent(); |
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| 161 | while ((grp = getgrent())) { |
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| 162 | for (i = 0; grp->gr_mem[i]; i++) |
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| 163 | if (!strcmp(grp->gr_mem[i], uname)) { |
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| 164 | if (ngroups == NGRPS) { |
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| 165 | #ifdef DEBUG |
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| 166 | fprintf(stderr, |
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| 167 | "initgroups: %s is in too many groups\n", uname); |
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| 168 | #endif |
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| 169 | goto toomany; |
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| 170 | } |
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| 171 | /* filter out duplicate group entries */ |
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| 172 | filter = 0; |
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| 173 | for (j = 0; j < ngroups; j++) |
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| 174 | if (groups[j] == grp->gr_gid) { |
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| 175 | filter++; |
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| 176 | break; |
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| 177 | } |
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| 178 | if (!filter) |
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| 179 | groups[ngroups++] = grp->gr_gid; |
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| 180 | } |
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| 181 | } |
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| 182 | toomany: |
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| 183 | endgrent(); |
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| 184 | return (ngroups); |
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| 185 | } |
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| 186 | |
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| 187 | /* |
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| 188 | * Convert network-name to hostname |
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| 189 | */ |
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| 190 | int |
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| 191 | netname2host(char netname[MAXNETNAMELEN + 1], char *hostname, int hostlen) |
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| 192 | { |
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| 193 | int err; |
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| 194 | char valbuf[1024]; |
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| 195 | char *val; |
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| 196 | char *val2; |
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| 197 | int vallen; |
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| 198 | char *domain; |
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| 199 | |
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| 200 | if (getnetid(netname, valbuf)) { |
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| 201 | val = valbuf; |
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| 202 | if ((*val == '0') && (val[1] == ':')) { |
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| 203 | (void) strncpy(hostname, val + 2, hostlen); |
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| 204 | return (1); |
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| 205 | } |
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| 206 | } |
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| 207 | val = strchr(netname, '.'); |
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| 208 | if (val == NULL) |
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| 209 | return (0); |
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| 210 | if (strncmp(netname, OPSYS, (val - netname))) |
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| 211 | return (0); |
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| 212 | val++; |
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| 213 | val2 = strchr(val, '@'); |
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| 214 | if (val2 == NULL) |
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| 215 | return (0); |
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| 216 | vallen = val2 - val; |
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| 217 | if (vallen > (hostlen - 1)) |
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| 218 | vallen = hostlen - 1; |
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| 219 | (void) strncpy(hostname, val, vallen); |
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| 220 | hostname[vallen] = 0; |
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| 221 | |
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| 222 | err = __rpc_get_default_domain(&domain); /* change to rpc */ |
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| 223 | if (err) |
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| 224 | return (0); |
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| 225 | |
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| 226 | if (strcmp(val2 + 1, domain)) |
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| 227 | return (0); /* wrong domain */ |
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| 228 | else |
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| 229 | return (1); |
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| 230 | } |
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| 231 | |
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| 232 | /* |
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| 233 | * reads the file /etc/netid looking for a + to optionally go to the |
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| 234 | * network information service. |
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| 235 | */ |
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| 236 | int |
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| 237 | getnetid(char *key, char *ret) |
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| 238 | { |
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| 239 | char buf[1024]; /* big enough */ |
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| 240 | char *res; |
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| 241 | char *mkey; |
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| 242 | char *mval; |
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| 243 | FILE *fd; |
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| 244 | #ifdef YP |
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| 245 | char *domain; |
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| 246 | int err; |
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| 247 | char *lookup; |
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| 248 | int len; |
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| 249 | #endif |
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| 250 | int rv; |
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| 251 | |
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| 252 | rv = 0; |
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| 253 | |
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| 254 | fd = fopen(NETIDFILE, "r"); |
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| 255 | if (fd == NULL) { |
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| 256 | #ifdef YP |
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| 257 | res = "+"; |
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| 258 | goto getnetidyp; |
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| 259 | #else |
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| 260 | return (0); |
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| 261 | #endif |
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| 262 | } |
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| 263 | while (fd != NULL) { |
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| 264 | res = fgets(buf, sizeof(buf), fd); |
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| 265 | if (res == NULL) { |
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| 266 | rv = 0; |
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| 267 | goto done; |
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| 268 | } |
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| 269 | if (res[0] == '#') |
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| 270 | continue; |
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| 271 | else if (res[0] == '+') { |
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| 272 | #ifdef YP |
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| 273 | getnetidyp: |
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| 274 | err = yp_get_default_domain(&domain); |
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| 275 | if (err) { |
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| 276 | continue; |
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| 277 | } |
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| 278 | lookup = NULL; |
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| 279 | err = yp_match(domain, NETID, key, |
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| 280 | strlen(key), &lookup, &len); |
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| 281 | if (err) { |
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| 282 | #ifdef DEBUG |
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| 283 | fprintf(stderr, "match failed error %d\n", err); |
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| 284 | #endif |
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| 285 | continue; |
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| 286 | } |
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| 287 | lookup[len] = 0; |
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| 288 | strcpy(ret, lookup); |
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| 289 | free(lookup); |
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| 290 | rv = 2; |
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| 291 | goto done; |
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| 292 | #else /* YP */ |
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| 293 | #ifdef DEBUG |
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| 294 | fprintf(stderr, |
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| 295 | "Bad record in %s '+' -- NIS not supported in this library copy\n", |
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| 296 | NETIDFILE); |
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| 297 | #endif |
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| 298 | continue; |
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| 299 | #endif /* YP */ |
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| 300 | } else { |
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| 301 | mkey = strsep(&res, "\t "); |
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| 302 | if (mkey == NULL) { |
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| 303 | fprintf(stderr, |
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| 304 | "Bad record in %s -- %s", NETIDFILE, buf); |
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| 305 | continue; |
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| 306 | } |
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| 307 | do { |
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| 308 | mval = strsep(&res, " \t#\n"); |
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| 309 | } while (mval != NULL && !*mval); |
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| 310 | if (mval == NULL) { |
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| 311 | fprintf(stderr, |
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| 312 | "Bad record in %s val problem - %s", NETIDFILE, buf); |
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| 313 | continue; |
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| 314 | } |
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| 315 | if (strcmp(mkey, key) == 0) { |
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| 316 | strcpy(ret, mval); |
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| 317 | rv = 1; |
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| 318 | goto done; |
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| 319 | } |
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| 320 | } |
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| 321 | } |
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| 322 | |
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| 323 | done: |
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| 324 | if (fd != NULL) |
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| 325 | fclose(fd); |
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| 326 | return (rv); |
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| 327 | } |
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