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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)cap_mkdb.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/cap_mkdb/cap_mkdb.c,v 1.6.2.2 2001/08/02 01:15:51 obrien Exp $ 36 * $DragonFly: src/usr.bin/cap_mkdb/cap_mkdb.c,v 1.4 2003/11/03 19:31:28 eirikn Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 42 #include <db.h> 43 #include <err.h> 44 #include <fcntl.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 int main(int, char *[]); 51 void db_build(char **); 52 void dounlink(void); 53 void usage(void); 54 55 DB *capdbp; 56 int verbose; 57 char *capdb, *capname, buf[8 * 1024]; 58 59 /* 60 * Mkcapdb creates a capability hash database for quick retrieval of capability 61 * records. The database contains 2 types of entries: records and references 62 * marked by the first byte in the data. A record entry contains the actual 63 * capability record whereas a reference contains the name (key) under which 64 * the correct record is stored. 65 */ 66 int 67 main(int argc, char **argv) 68 { 69 int c; 70 71 capname = NULL; 72 while ((c = getopt(argc, argv, "f:v")) != -1) { 73 switch(c) { 74 case 'f': 75 capname = optarg; 76 break; 77 case 'v': 78 verbose = 1; 79 break; 80 case '?': 81 default: 82 usage(); 83 } 84 } 85 argc -= optind; 86 argv += optind; 87 88 if (*argv == NULL) 89 usage(); 90 91 /* 92 * The database file is the first argument if no name is specified. 93 * Make arrangements to unlink it if exit badly. 94 */ 95 (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); 96 if ((capname = strdup(buf)) == NULL) 97 errx(1, "strdup failed"); 98 if ((capdbp = dbopen(capname, 99 O_CREAT | O_TRUNC | O_RDWR, DEFFILEMODE, DB_HASH, NULL)) == NULL) 100 err(1, "%s", buf); 101 102 if (atexit(dounlink)) 103 err(1, "atexit"); 104 105 db_build(argv); 106 107 if (capdbp->close(capdbp) < 0) 108 err(1, "%s", capname); 109 capname = NULL; 110 exit(0); 111 } 112 113 void 114 dounlink(void) 115 { 116 if (capname != NULL) 117 (void)unlink(capname); 118 } 119 120 /* 121 * Any changes to these definitions should be made also in the getcap(3) 122 * library routines. 123 */ 124 #define RECOK (char)0 125 #define TCERR (char)1 126 #define SHADOW (char)2 127 128 /* 129 * Db_build() builds the name and capability databases according to the 130 * details above. 131 */ 132 void 133 db_build(char **ifiles) 134 { 135 DBT key, data; 136 recno_t reccnt; 137 size_t len, bplen; 138 int st; 139 char *bp, *p, *t; 140 141 data.data = NULL; 142 key.data = NULL; 143 for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) { 144 145 /* 146 * Allocate enough memory to store record, terminating 147 * NULL and one extra byte. 148 */ 149 len = strlen(bp); 150 if (bplen <= len + 2) { 151 bplen += MAX(256, len + 2); 152 if ((data.data = realloc(data.data, bplen)) == NULL) 153 errx(1, "malloc failed"); 154 } 155 156 /* Find the end of the name field. */ 157 if ((p = strchr(bp, ':')) == NULL) { 158 warnx("no name field: %.*s", (int)MIN(len, 20), bp); 159 continue; 160 } 161 162 /* First byte of stored record indicates status. */ 163 switch(st) { 164 case 1: 165 ((char *)(data.data))[0] = RECOK; 166 break; 167 case 2: 168 ((char *)(data.data))[0] = TCERR; 169 warnx("record not tc expanded: %.*s", (int)(p - bp), 170 bp); 171 break; 172 } 173 174 /* Create the stored record. */ 175 memmove(&((u_char *)(data.data))[1], bp, len + 1); 176 data.size = len + 2; 177 178 /* Store the record under the name field. */ 179 key.data = bp; 180 key.size = p - bp; 181 182 switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) { 183 case -1: 184 err(1, "put"); 185 /* NOTREACHED */ 186 case 1: 187 warnx("ignored duplicate: %.*s", 188 (int)key.size, (char *)key.data); 189 continue; 190 } 191 ++reccnt; 192 193 /* If only one name, ignore the rest. */ 194 *p = '\0'; 195 if (strchr(bp, '|') == NULL) 196 continue; 197 *p = ':'; 198 199 /* The rest of the names reference the entire name. */ 200 ((char *)(data.data))[0] = SHADOW; 201 memmove(&((u_char *)(data.data))[1], key.data, key.size); 202 data.size = key.size + 1; 203 204 /* Store references for other names. */ 205 for (p = t = bp;; ++p) { 206 if (p > t && (*p == ':' || *p == '|')) { 207 key.size = p - t; 208 key.data = t; 209 switch(capdbp->put(capdbp, 210 &key, &data, R_NOOVERWRITE)) { 211 case -1: 212 err(1, "put"); 213 /* NOTREACHED */ 214 case 1: 215 warnx("ignored duplicate: %.*s", 216 (int)key.size, (char *)key.data); 217 } 218 t = p + 1; 219 } 220 if (*p == ':') 221 break; 222 } 223 } 224 225 switch(st) { 226 case -1: 227 err(1, "file argument"); 228 /* NOTREACHED */ 229 case -2: 230 errx(1, "potential reference loop detected"); 231 /* NOTREACHED */ 232 } 233 234 if (verbose) 235 (void)printf("cap_mkdb: %d capability records\n", reccnt); 236 } 237 238 void 239 usage(void) 240 { 241 (void)fprintf(stderr, 242 "usage: cap_mkdb [-v] [-f outfile] file [file ...]\n"); 243 exit(1); 244 } 245