cap_mkdb.c revision 1.12
1 /* $NetBSD: cap_mkdb.c,v 1.12 2000/10/04 20:02:26 mjl Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)cap_mkdb.c 8.2 (Berkeley) 4/27/95"; 45 #endif 46 __RCSID("$NetBSD: cap_mkdb.c,v 1.12 2000/10/04 20:02:26 mjl Exp $"); 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 52 #include <db.h> 53 #include <err.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 void db_build (char **); 61 void dounlink (void); 62 void usage (void); 63 64 DB *capdbp; 65 int verbose; 66 char *capdb, *capname, buf[8 * 1024]; 67 68 HASHINFO openinfo = { 69 4096, /* bsize */ 70 16, /* ffactor */ 71 2048, /* nelem */ 72 2048 * 1024, /* cachesize */ 73 NULL, /* hash() */ 74 0 /* lorder */ 75 }; 76 77 /* 78 * Mkcapdb creates a capability hash database for quick retrieval of capability 79 * records. The database contains 2 types of entries: records and references 80 * marked by the first byte in the data. A record entry contains the actual 81 * capability record whereas a reference contains the name (key) under which 82 * the correct record is stored. 83 */ 84 int 85 main(int argc, char *argv[]) 86 { 87 int c, byteorder; 88 89 capname = NULL; 90 byteorder = 0; 91 while ((c = getopt(argc, argv, "bf:lv")) != -1) { 92 switch(c) { 93 case 'b': 94 case 'l': 95 if (byteorder != 0) 96 usage(); 97 byteorder = c == 'b' ? 4321 : 1234; 98 break; 99 case 'f': 100 capname = optarg; 101 break; 102 case 'v': 103 verbose = 1; 104 break; 105 case '?': 106 default: 107 usage(); 108 } 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (*argv == NULL) 114 usage(); 115 116 /* Set byte order */ 117 openinfo.lorder = byteorder; 118 119 /* 120 * The database file is the first argument if no name is specified. 121 * Make arrangements to unlink it if exit badly. 122 */ 123 (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); 124 if ((capname = strdup(buf)) == NULL) 125 err(1, "strdup"); 126 if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR, 127 DEFFILEMODE, DB_HASH, &openinfo)) == NULL) 128 err(1, "%s", buf); 129 130 if (atexit(dounlink)) 131 err(1, "atexit"); 132 133 db_build(argv); 134 135 if (capdbp->close(capdbp) < 0) 136 err(1, "%s", capname); 137 capname = NULL; 138 exit(0); 139 } 140 141 void 142 dounlink(void) 143 { 144 if (capname != NULL) 145 (void)unlink(capname); 146 } 147 148 /* 149 * Any changes to these definitions should be made also in the getcap(3) 150 * library routines. 151 */ 152 #define RECOK (char)0 153 #define TCERR (char)1 154 #define SHADOW (char)2 155 156 /* 157 * Db_build() builds the name and capabilty databases according to the 158 * details above. 159 */ 160 void 161 db_build(char **ifiles) 162 { 163 DBT key, data; 164 recno_t reccnt; 165 size_t len, bplen; 166 int st; 167 char *bp, *p, *t; 168 169 data.data = NULL; 170 key.data = NULL; 171 for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) { 172 173 /* 174 * Allocate enough memory to store record, terminating 175 * NULL and one extra byte. 176 */ 177 len = strlen(bp); 178 if (bplen <= len + 2) { 179 bplen += MAX(256, len + 2); 180 if ((data.data = realloc(data.data, bplen)) == NULL) 181 err(1, "realloc"); 182 } 183 184 /* Find the end of the name field. */ 185 if ((p = strchr(bp, ':')) == NULL) { 186 warnx("no name field: %.*s", (int)(MIN(len, 20)), bp); 187 continue; 188 } 189 190 /* First byte of stored record indicates status. */ 191 switch(st) { 192 case 1: 193 ((char *)(data.data))[0] = RECOK; 194 break; 195 case 2: 196 ((char *)(data.data))[0] = TCERR; 197 warnx("Record not tc expanded: %.*s", (int)(p - bp),bp); 198 break; 199 } 200 201 /* Create the stored record. */ 202 memmove(&((u_char *)(data.data))[1], bp, len + 1); 203 data.size = len + 2; 204 205 /* Store the record under the name field. */ 206 key.data = bp; 207 key.size = p - bp; 208 209 switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) { 210 case -1: 211 err(1, "put"); 212 /* NOTREACHED */ 213 case 1: 214 warnx("ignored duplicate: %.*s", 215 (int)key.size, (char *)key.data); 216 continue; 217 } 218 ++reccnt; 219 220 /* If only one name, ignore the rest. */ 221 if ((p = strchr(bp, '|')) == NULL) 222 continue; 223 224 /* The rest of the names reference the entire name. */ 225 ((char *)(data.data))[0] = SHADOW; 226 memmove(&((u_char *)(data.data))[1], key.data, key.size); 227 data.size = key.size + 1; 228 229 /* Store references for other names. */ 230 for (p = t = bp;; ++p) { 231 if (p > t && (*p == ':' || *p == '|')) { 232 key.size = p - t; 233 key.data = t; 234 switch(capdbp->put(capdbp, 235 &key, &data, R_NOOVERWRITE)) { 236 case -1: 237 err(1, "put"); 238 /* NOTREACHED */ 239 case 1: 240 warnx("ignored duplicate: %.*s", 241 (int)key.size, (char *)key.data); 242 } 243 t = p + 1; 244 } 245 if (*p == ':') 246 break; 247 } 248 } 249 250 switch(st) { 251 case -1: 252 err(1, "file argument"); 253 /* NOTREACHED */ 254 case -2: 255 errx(1, "potential reference loop detected"); 256 /* NOTREACHED */ 257 } 258 259 if (verbose) 260 (void)printf("cap_mkdb: %d capability records\n", reccnt); 261 } 262 263 void 264 usage(void) 265 { 266 (void)fprintf(stderr, 267 "usage: cap_mkdb [-b|-l] [-v] [-f outfile] file1 [file2 ...]\n"); 268 exit(1); 269 } 270
Indexes created Fri Oct 03 02:09:57 GMT 2025