cap_mkdb.c revision 1.7
1 /* $NetBSD: cap_mkdb.c,v 1.7 1997/10/18 12:55:39 lukem 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 1.7 1997/10/18 12:55:39 lukem 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 <errno.h> 55 #include <fcntl.h> 56 #include <limits.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 void db_build __P((char **)); 63 void dounlink __P((void)); 64 int main __P((int, char **)); 65 void usage __P((void)); 66 67 DB *capdbp; 68 int verbose; 69 char *capdb, *capname, buf[8 * 1024]; 70 71 HASHINFO openinfo = { 72 4096, /* bsize */ 73 16, /* ffactor */ 74 256, /* nelem */ 75 2048 * 1024, /* cachesize */ 76 NULL, /* hash() */ 77 0 /* lorder */ 78 }; 79 80 /* 81 * Mkcapdb creates a capability hash database for quick retrieval of capability 82 * records. The database contains 2 types of entries: records and references 83 * marked by the first byte in the data. A record entry contains the actual 84 * capability record whereas a reference contains the name (key) under which 85 * the correct record is stored. 86 */ 87 int 88 main(argc, argv) 89 int argc; 90 char *argv[]; 91 { 92 int c; 93 94 capname = NULL; 95 while ((c = getopt(argc, argv, "f:v")) != -1) { 96 switch(c) { 97 case 'f': 98 capname = optarg; 99 break; 100 case 'v': 101 verbose = 1; 102 break; 103 case '?': 104 default: 105 usage(); 106 } 107 } 108 argc -= optind; 109 argv += optind; 110 111 if (*argv == NULL) 112 usage(); 113 114 /* 115 * The database file is the first argument if no name is specified. 116 * Make arrangements to unlink it if exit badly. 117 */ 118 (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); 119 if ((capname = strdup(buf)) == NULL) 120 err(1, "strdup"); 121 if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR, 122 DEFFILEMODE, DB_HASH, &openinfo)) == NULL) 123 err(1, "%s", buf); 124 125 if (atexit(dounlink)) 126 err(1, "atexit"); 127 128 db_build(argv); 129 130 if (capdbp->close(capdbp) < 0) 131 err(1, "%s", capname); 132 capname = NULL; 133 exit(0); 134 } 135 136 void 137 dounlink() 138 { 139 if (capname != NULL) 140 (void)unlink(capname); 141 } 142 143 /* 144 * Any changes to these definitions should be made also in the getcap(3) 145 * library routines. 146 */ 147 #define RECOK (char)0 148 #define TCERR (char)1 149 #define SHADOW (char)2 150 151 /* 152 * Db_build() builds the name and capabilty databases according to the 153 * details above. 154 */ 155 void 156 db_build(ifiles) 157 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 err(1, "realloc"); 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", p - bp, bp); 194 break; 195 } 196 197 /* Create the stored record. */ 198 memmove(&((u_char *)(data.data))[1], bp, len + 1); 199 data.size = len + 2; 200 201 /* Store the record under the name field. */ 202 key.data = bp; 203 key.size = p - bp; 204 205 switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) { 206 case -1: 207 err(1, "put"); 208 /* NOTREACHED */ 209 case 1: 210 warnx("ignored duplicate: %.*s", 211 (int)key.size, (char *)key.data); 212 continue; 213 } 214 ++reccnt; 215 216 /* If only one name, ignore the rest. */ 217 if ((p = strchr(bp, '|')) == NULL) 218 continue; 219 220 /* The rest of the names reference the entire name. */ 221 ((char *)(data.data))[0] = SHADOW; 222 memmove(&((u_char *)(data.data))[1], key.data, key.size); 223 data.size = key.size + 1; 224 225 /* Store references for other names. */ 226 for (p = t = bp;; ++p) { 227 if (p > t && (*p == ':' || *p == '|')) { 228 key.size = p - t; 229 key.data = t; 230 switch(capdbp->put(capdbp, 231 &key, &data, R_NOOVERWRITE)) { 232 case -1: 233 err(1, "put"); 234 /* NOTREACHED */ 235 case 1: 236 warnx("ignored duplicate: %.*s", 237 (int)key.size, (char *)key.data); 238 } 239 t = p + 1; 240 } 241 if (*p == ':') 242 break; 243 } 244 } 245 246 switch(st) { 247 case -1: 248 err(1, "file argument"); 249 /* NOTREACHED */ 250 case -2: 251 errx(1, "potential reference loop detected"); 252 /* NOTREACHED */ 253 } 254 255 if (verbose) 256 (void)printf("cap_mkdb: %d capability records\n", reccnt); 257 } 258 259 void 260 usage() 261 { 262 (void)fprintf(stderr, 263 "usage: cap_mkdb [-v] [-f outfile] file1 [file2 ...]\n"); 264 exit(1); 265 } 266
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