| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: name.c,v 1.2 1997/08/04 10:24:24 mdw Exp $ |
| 4 | * |
| 5 | * Looking up of names in symbol tables |
| 6 | * |
| 7 | * (c) 1997 EBI |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of `become' |
| 13 | * |
| 14 | * `Become' is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * `Become' is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with `become'; if not, write to the Free Software Foundation, |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Revision history --------------------------------------------------* |
| 30 | * |
| 31 | * $Log: name.c,v $ |
| 32 | * Revision 1.2 1997/08/04 10:24:24 mdw |
| 33 | * Sources placed under CVS control. |
| 34 | * |
| 35 | * Revision 1.1 1997/07/21 13:47:46 mdw |
| 36 | * Initial revision |
| 37 | * |
| 38 | */ |
| 39 | |
| 40 | /*----- Header files ------------------------------------------------------*/ |
| 41 | |
| 42 | /* --- ANSI headers --- */ |
| 43 | |
| 44 | #include <stdio.h> |
| 45 | #include <stdlib.h> |
| 46 | #include <string.h> |
| 47 | |
| 48 | /* --- Unix headers --- */ |
| 49 | |
| 50 | #include "config.h" |
| 51 | |
| 52 | #ifdef HAVE_YP |
| 53 | # include <rpcsvc/ypclnt.h> |
| 54 | # include <rpcsvc/yp_prot.h> |
| 55 | #endif |
| 56 | |
| 57 | #include <grp.h> |
| 58 | #include <pwd.h> |
| 59 | |
| 60 | /* --- Local headers --- */ |
| 61 | |
| 62 | #include "become.h" |
| 63 | #include "class.h" |
| 64 | #include "name.h" |
| 65 | #include "sym.h" |
| 66 | #include "userdb.h" |
| 67 | #include "utils.h" |
| 68 | |
| 69 | /*----- Static variables --------------------------------------------------*/ |
| 70 | |
| 71 | static sym_table name__table; /* Symbol table for everything */ |
| 72 | |
| 73 | /*----- Main code ---------------------------------------------------------*/ |
| 74 | |
| 75 | /* --- @name__users@ --- * |
| 76 | * |
| 77 | * Arguments: --- |
| 78 | * |
| 79 | * Returns: --- |
| 80 | * |
| 81 | * Use: Adds all of the users registered with the user database to |
| 82 | * the name table. Also adds the users' primary groups. |
| 83 | */ |
| 84 | |
| 85 | static void name__users(void) |
| 86 | { |
| 87 | struct passwd *pw; |
| 88 | struct group *gr; |
| 89 | |
| 90 | userdb_iterateUsers(); |
| 91 | while ((pw = userdb_nextUser()) != 0) { |
| 92 | unsigned f; |
| 93 | name *n; |
| 94 | int u; |
| 95 | |
| 96 | /* --- First, add the user to the table --- */ |
| 97 | |
| 98 | n = sym_find(&name__table, pw->pw_name, -1, sizeof(name), &f); |
| 99 | if (!f) { |
| 100 | sym_table *t = xmalloc(sizeof(*t)); |
| 101 | sym_createTable(t); |
| 102 | n->c = class_create(clType_user, t); |
| 103 | } |
| 104 | u = pw->pw_uid; |
| 105 | sym_find(n->c->t, (char *)&u, sizeof(u), sizeof(sym_base), 0); |
| 106 | |
| 107 | /* --- Now handle the user's default group --- */ |
| 108 | |
| 109 | if ((gr = userdb_groupById(pw->pw_gid)) != 0) { |
| 110 | n = sym_find(&name__table, gr->gr_name, -1, sizeof(name), &f); |
| 111 | if (!f) { |
| 112 | sym_table *t = xmalloc(sizeof(*t)); |
| 113 | sym_createTable(t); |
| 114 | n->c = class_create(clType_user, t); |
| 115 | } |
| 116 | sym_find(n->c->t, (char *)&u, sizeof(u), sizeof(sym_base), 0); |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* --- @name__groups@ --- * |
| 122 | * |
| 123 | * Arguments: --- |
| 124 | * |
| 125 | * Returns: --- |
| 126 | * |
| 127 | * Use: Adds users into all of their supplementary groups. |
| 128 | */ |
| 129 | |
| 130 | static void name__groups(void) |
| 131 | { |
| 132 | struct group *gr; |
| 133 | struct passwd *pw; |
| 134 | char **p; |
| 135 | |
| 136 | userdb_iterateGroups(); |
| 137 | while ((gr = userdb_nextGroup()) != 0) { |
| 138 | unsigned f; |
| 139 | name *n; |
| 140 | int u; |
| 141 | |
| 142 | /* --- Add the group name to the table --- */ |
| 143 | |
| 144 | n = sym_find(&name__table, gr->gr_name, -1, sizeof(name), &f); |
| 145 | if (!f) { |
| 146 | sym_table *t = xmalloc(sizeof(*t)); |
| 147 | sym_createTable(t); |
| 148 | n->c = class_create(clType_user, t); |
| 149 | } |
| 150 | |
| 151 | /* --- Now add all of the members --- */ |
| 152 | |
| 153 | for (p = gr->gr_mem; *p; p++) { |
| 154 | if ((pw = userdb_userByName(*p)) != 0) { |
| 155 | u = pw->pw_uid; |
| 156 | sym_find(n->c->t, (char *)&u, sizeof(u), sizeof(sym_base), 0); |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* --- @name_init@ --- * |
| 163 | * |
| 164 | * Arguments: --- |
| 165 | * |
| 166 | * Returns: --- |
| 167 | * |
| 168 | * Use: Initialises the name table. Requires the user database to |
| 169 | * be populated (see @userdb_local@ and @userdb_yp@). |
| 170 | */ |
| 171 | |
| 172 | void name_init(void) |
| 173 | { |
| 174 | /* --- Initialise the name table --- */ |
| 175 | |
| 176 | sym_createTable(&name__table); |
| 177 | |
| 178 | /* --- Add everyone into the table --- */ |
| 179 | |
| 180 | name__users(); |
| 181 | name__groups(); |
| 182 | |
| 183 | /* --- Finally add in the `all' class --- * |
| 184 | * |
| 185 | * Do that now, to prevent it being overwritten by the above. |
| 186 | */ |
| 187 | |
| 188 | { |
| 189 | name *n; |
| 190 | unsigned f; |
| 191 | |
| 192 | n = sym_find(&name__table, "all", -1, sizeof(name), &f); |
| 193 | if (f) |
| 194 | class_dec(n->c); |
| 195 | n->c = class_all; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /* --- @name_reinit@ --- * |
| 200 | * |
| 201 | * Arguments: --- |
| 202 | * |
| 203 | * Returns: --- |
| 204 | * |
| 205 | * Use: Reinitialises the names table. It's cleared and then |
| 206 | * initialised with the current user and group ids as for |
| 207 | * @name_init@ above. |
| 208 | */ |
| 209 | |
| 210 | void name_reinit(void) |
| 211 | { |
| 212 | /* --- Empty the symbol table --- */ |
| 213 | |
| 214 | { |
| 215 | sym_iter i; |
| 216 | name *n; |
| 217 | |
| 218 | for (sym_createIter(&i, &name__table); (n = sym_next(&i)) != 0; ) { |
| 219 | if (n->c) |
| 220 | class_dec(n->c); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* --- Destroy and recreate the table --- */ |
| 225 | |
| 226 | sym_destroyTable(&name__table); |
| 227 | name_init(); |
| 228 | } |
| 229 | |
| 230 | /* --- @name_find@ --- * |
| 231 | * |
| 232 | * Arguments: @const char *p@ = pointer to name to look up |
| 233 | * @unsigned create@ = whether to create the item |
| 234 | * @unsigned *f@ = whether the item was created |
| 235 | * |
| 236 | * Returns: Pointer to a @name@ block containing the symbol, or |
| 237 | * zero if it wasn't found and we didn't want to create a |
| 238 | * new one. |
| 239 | * |
| 240 | * Use: Looks up a name in the symbol table and returns the |
| 241 | * item so located. |
| 242 | */ |
| 243 | |
| 244 | name *name_find(const char *p, unsigned create, unsigned *f) |
| 245 | { |
| 246 | /* --- This is a trivial veneer onto @sym_find@ --- */ |
| 247 | |
| 248 | return (sym_find(&name__table, p, -1, create ? sizeof(name) : 0, f)); |
| 249 | } |
| 250 | |
| 251 | /* --- @name_dump@ --- * |
| 252 | * |
| 253 | * Arguments: --- |
| 254 | * |
| 255 | * Returns: --- |
| 256 | * |
| 257 | * Use: Dumps a complete listing of the symbol table. |
| 258 | */ |
| 259 | |
| 260 | void name_dump(void) |
| 261 | { |
| 262 | sym_iter i; |
| 263 | name *n; |
| 264 | |
| 265 | trace(TRACE_DEBUG, "name: dumping names"); |
| 266 | for (sym_createIter(&i, &name__table); (n = sym_next(&i)) != 0; ) { |
| 267 | trace(TRACE_DEBUG, "name: dumping `%s'", n->base.name); |
| 268 | class_dump(n->c); |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | /*----- Test driver -------------------------------------------------------*/ |
| 273 | |
| 274 | #ifdef TEST_RIG |
| 275 | |
| 276 | int main(void) |
| 277 | { |
| 278 | userdb_init(); |
| 279 | userdb_local(); |
| 280 | userdb_yp(); |
| 281 | ego("name-test"); |
| 282 | traceon(stdout, TRACE_DEBUG); |
| 283 | name_init(); |
| 284 | name_dump(); |
| 285 | return (0); |
| 286 | } |
| 287 | |
| 288 | #endif |