1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)cap_mkdb.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/cap_mkdb/cap_mkdb.c,v 1.14 2005/02/22 23:29:53 ru Exp $ 32 * $DragonFly: src/usr.bin/cap_mkdb/cap_mkdb.c,v 1.5 2007/09/25 04:53:48 pavalos Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/stat.h> 37 38 #include <db.h> 39 #include <err.h> 40 #include <fcntl.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 void db_build(char **); 47 void dounlink(void); 48 void usage(void); 49 50 DB *capdbp; 51 int verbose; 52 char *capdb, *capname, buf[8 * 1024]; 53 54 HASHINFO openinfo = { 55 4096, /* bsize */ 56 0, /* ffactor */ 57 0, /* nelem */ 58 0, /* cachesize */ 59 NULL, /* hash() */ 60 0 /* lorder */ 61 }; 62 63 /* 64 * Mkcapdb creates a capability hash database for quick retrieval of capability 65 * records. The database contains 2 types of entries: records and references 66 * marked by the first byte in the data. A record entry contains the actual 67 * capability record whereas a reference contains the name (key) under which 68 * the correct record is stored. 69 */ 70 int 71 main(int argc, char **argv) 72 { 73 int byteorder, c; 74 75 capname = NULL; 76 byteorder = 0; 77 while ((c = getopt(argc, argv, "bf:lv")) != -1) { 78 switch(c) { 79 case 'b': 80 case 'l': 81 if (byteorder != 0) 82 usage(); 83 byteorder = c == 'b' ? 4321 : 1234; 84 break; 85 case 'f': 86 capname = optarg; 87 break; 88 case 'v': 89 verbose = 1; 90 break; 91 case '?': 92 default: 93 usage(); 94 } 95 } 96 argc -= optind; 97 argv += optind; 98 99 if (*argv == NULL) 100 usage(); 101 102 /* Set byte order. */ 103 openinfo.lorder = byteorder; 104 105 /* 106 * The database file is the first argument if no name is specified. 107 * Make arrangements to unlink it if exit badly. 108 */ 109 (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); 110 if ((capname = strdup(buf)) == NULL) 111 errx(1, "strdup failed"); 112 if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR, 113 DEFFILEMODE, DB_HASH, &openinfo)) == NULL) 114 err(1, "%s", buf); 115 116 if (atexit(dounlink)) 117 err(1, "atexit"); 118 119 db_build(argv); 120 121 if (capdbp->close(capdbp) < 0) 122 err(1, "%s", capname); 123 capname = NULL; 124 exit(0); 125 } 126 127 void 128 dounlink(void) 129 { 130 if (capname != NULL) 131 (void)unlink(capname); 132 } 133 134 /* 135 * Any changes to these definitions should be made also in the getcap(3) 136 * library routines. 137 */ 138 #define RECOK (char)0 139 #define TCERR (char)1 140 #define SHADOW (char)2 141 142 /* 143 * Db_build() builds the name and capability databases according to the 144 * details above. 145 */ 146 void 147 db_build(char **ifiles) 148 { 149 DBT key, data; 150 recno_t reccnt; 151 size_t len, bplen; 152 int st; 153 char *bp, *p, *t; 154 155 data.data = NULL; 156 key.data = NULL; 157 for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) { 158 159 /* 160 * Allocate enough memory to store record, terminating 161 * NULL and one extra byte. 162 */ 163 len = strlen(bp); 164 if (bplen <= len + 2) { 165 bplen += MAX(256, len + 2); 166 if ((data.data = realloc(data.data, bplen)) == NULL) 167 errx(1, "malloc failed"); 168 } 169 170 /* Find the end of the name field. */ 171 if ((p = strchr(bp, ':')) == NULL) { 172 warnx("no name field: %.*s", (int)MIN(len, 20), bp); 173 continue; 174 } 175 176 /* First byte of stored record indicates status. */ 177 switch(st) { 178 case 1: 179 ((char *)(data.data))[0] = RECOK; 180 break; 181 case 2: 182 ((char *)(data.data))[0] = TCERR; 183 warnx("record not tc expanded: %.*s", (int)(p - bp), 184 bp); 185 break; 186 } 187 188 /* Create the stored record. */ 189 memmove(&((u_char *)(data.data))[1], bp, len + 1); 190 data.size = len + 2; 191 192 /* Store the record under the name field. */ 193 key.data = bp; 194 key.size = p - bp; 195 196 switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) { 197 case -1: 198 err(1, "put"); 199 /* NOTREACHED */ 200 case 1: 201 warnx("ignored duplicate: %.*s", 202 (int)key.size, (char *)key.data); 203 continue; 204 } 205 ++reccnt; 206 207 /* If only one name, ignore the rest. */ 208 *p = '\0'; 209 if (strchr(bp, '|') == NULL) 210 continue; 211 *p = ':'; 212 213 /* The rest of the names reference the entire name. */ 214 ((char *)(data.data))[0] = SHADOW; 215 memmove(&((u_char *)(data.data))[1], key.data, key.size); 216 data.size = key.size + 1; 217 218 /* Store references for other names. */ 219 for (p = t = bp;; ++p) { 220 if (p > t && (*p == ':' || *p == '|')) { 221 key.size = p - t; 222 key.data = t; 223 switch(capdbp->put(capdbp, 224 &key, &data, R_NOOVERWRITE)) { 225 case -1: 226 err(1, "put"); 227 /* NOTREACHED */ 228 case 1: 229 warnx("ignored duplicate: %.*s", 230 (int)key.size, (char *)key.data); 231 } 232 t = p + 1; 233 } 234 if (*p == ':') 235 break; 236 } 237 } 238 239 switch(st) { 240 case -1: 241 err(1, "file argument"); 242 /* NOTREACHED */ 243 case -2: 244 errx(1, "potential reference loop detected"); 245 /* NOTREACHED */ 246 } 247 248 if (verbose) 249 (void)printf("cap_mkdb: %d capability records\n", reccnt); 250 } 251 252 void 253 usage(void) 254 { 255 (void)fprintf(stderr, 256 "usage: cap_mkdb [-b | -l] [-v] [-f outfile] file ...\n"); 257 exit(1); 258 } 259