1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1992, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)cap_mkdb.c 8.2 (Berkeley) 4/27/95"; 41 #endif 42 #endif 43 44 #include <sys/cdefs.h> 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 48 #include <db.h> 49 #include <err.h> 50 #include <fcntl.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 static void db_build(char **); 57 static void dounlink(void); 58 static void usage(void); 59 60 static DB *capdbp; 61 static int verbose; 62 static char *capname, buf[8 * 1024]; 63 64 static HASHINFO openinfo = { 65 4096, /* bsize */ 66 0, /* ffactor */ 67 0, /* nelem */ 68 0, /* cachesize */ 69 NULL, /* hash() */ 70 0 /* lorder */ 71 }; 72 73 /* 74 * Mkcapdb creates a capability hash database for quick retrieval of capability 75 * records. The database contains 2 types of entries: records and references 76 * marked by the first byte in the data. A record entry contains the actual 77 * capability record whereas a reference contains the name (key) under which 78 * the correct record is stored. 79 */ 80 int 81 main(int argc, char *argv[]) 82 { 83 int byteorder, c; 84 85 capname = NULL; 86 byteorder = 0; 87 while ((c = getopt(argc, argv, "bf:lv")) != -1) { 88 switch(c) { 89 case 'b': 90 case 'l': 91 if (byteorder != 0) 92 usage(); 93 byteorder = c == 'b' ? 4321 : 1234; 94 break; 95 case 'f': 96 capname = optarg; 97 break; 98 case 'v': 99 verbose = 1; 100 break; 101 case '?': 102 default: 103 usage(); 104 } 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (*argv == NULL) 110 usage(); 111 112 /* Set byte order. */ 113 openinfo.lorder = byteorder; 114 115 /* 116 * The database file is the first argument if no name is specified. 117 * Make arrangements to unlink it if exit badly. 118 */ 119 (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); 120 if ((capname = strdup(buf)) == NULL) 121 errx(1, "strdup failed"); 122 if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR, 123 DEFFILEMODE, DB_HASH, &openinfo)) == NULL) 124 err(1, "%s", buf); 125 126 if (atexit(dounlink)) 127 err(1, "atexit"); 128 129 db_build(argv); 130 131 if (capdbp->close(capdbp) < 0) 132 err(1, "%s", capname); 133 capname = NULL; 134 exit(0); 135 } 136 137 static void 138 dounlink(void) 139 { 140 if (capname != NULL) 141 (void)unlink(capname); 142 } 143 144 /* 145 * Any changes to these definitions should be made also in the getcap(3) 146 * library routines. 147 */ 148 #define RECOK (char)0 149 #define TCERR (char)1 150 #define SHADOW (char)2 151 152 /* 153 * Db_build() builds the name and capability databases according to the 154 * details above. 155 */ 156 static void 157 db_build(char **ifiles) 158 { 159 DBT key, data; 160 recno_t reccnt; 161 size_t len, bplen; 162 int st; 163 char *bp, *p, *t; 164 165 data.data = NULL; 166 key.data = NULL; 167 for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) { 168 169 /* 170 * Allocate enough memory to store record, terminating 171 * NULL and one extra byte. 172 */ 173 len = strlen(bp); 174 if (bplen <= len + 2) { 175 bplen += MAX(256, len + 2); 176 if ((data.data = realloc(data.data, bplen)) == NULL) 177 errx(1, "malloc failed"); 178 } 179 180 /* Find the end of the name field. */ 181 if ((p = strchr(bp, ':')) == NULL) { 182 warnx("no name field: %.*s", (int)MIN(len, 20), bp); 183 continue; 184 } 185 186 /* First byte of stored record indicates status. */ 187 switch(st) { 188 case 1: 189 ((char *)(data.data))[0] = RECOK; 190 break; 191 case 2: 192 ((char *)(data.data))[0] = TCERR; 193 warnx("record not tc expanded: %.*s", (int)(p - bp), 194 bp); 195 break; 196 } 197 198 /* Create the stored record. */ 199 memmove(&((u_char *)(data.data))[1], bp, len + 1); 200 data.size = len + 2; 201 202 /* Store the record under the name field. */ 203 key.data = bp; 204 key.size = p - bp; 205 206 switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) { 207 case -1: 208 err(1, "put"); 209 /* NOTREACHED */ 210 case 1: 211 warnx("ignored duplicate: %.*s", 212 (int)key.size, (char *)key.data); 213 continue; 214 } 215 ++reccnt; 216 217 /* If only one name, ignore the rest. */ 218 *p = '\0'; 219 if (strchr(bp, '|') == NULL) 220 continue; 221 *p = ':'; 222 223 /* The rest of the names reference the entire name. */ 224 ((char *)(data.data))[0] = SHADOW; 225 memmove(&((u_char *)(data.data))[1], key.data, key.size); 226 data.size = key.size + 1; 227 228 /* Store references for other names. */ 229 for (p = t = bp;; ++p) { 230 if (p > t && (*p == ':' || *p == '|')) { 231 key.size = p - t; 232 key.data = t; 233 switch(capdbp->put(capdbp, 234 &key, &data, R_NOOVERWRITE)) { 235 case -1: 236 err(1, "put"); 237 /* NOTREACHED */ 238 case 1: 239 warnx("ignored duplicate: %.*s", 240 (int)key.size, (char *)key.data); 241 } 242 t = p + 1; 243 } 244 if (*p == ':') 245 break; 246 } 247 } 248 249 switch(st) { 250 case -1: 251 err(1, "file argument"); 252 /* NOTREACHED */ 253 case -2: 254 errx(1, "potential reference loop detected"); 255 /* NOTREACHED */ 256 } 257 258 if (verbose) 259 (void)printf("cap_mkdb: %d capability records\n", reccnt); 260 } 261 262 static void 263 usage(void) 264 { 265 (void)fprintf(stderr, 266 "usage: cap_mkdb [-b | -l] [-v] [-f outfile] file ...\n"); 267 exit(1); 268 } 269