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1.16 ! deraadt 1: /* $OpenBSD: cap_mkdb.c,v 1.15 2009/08/28 11:43:50 nicm Exp $ */
1.1 deraadt 2: /* $NetBSD: cap_mkdb.c,v 1.5 1995/09/02 05:47:12 jtc Exp $ */
3:
4: /*-
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.10 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/param.h>
34: #include <sys/stat.h>
35:
36: #include <db.h>
37: #include <err.h>
38: #include <errno.h>
39: #include <fcntl.h>
40: #include <limits.h>
41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
1.4 tholo 44: #include <ctype.h>
1.1 deraadt 45: #include <unistd.h>
46:
1.9 millert 47: void db_build(char **);
48: void dounlink(void);
49: void usage(void);
50: int igetnext(char **, char **);
51: int main(int, char *[]);
1.1 deraadt 52:
53: DB *capdbp;
1.4 tholo 54: int info, verbose;
55: char *capname, buf[8 * 1024];
1.1 deraadt 56:
57: HASHINFO openinfo = {
58: 4096, /* bsize */
59: 16, /* ffactor */
60: 256, /* nelem */
61: 2048 * 1024, /* cachesize */
62: NULL, /* hash() */
63: 0 /* lorder */
64: };
65:
66: /*
1.4 tholo 67: * cap_mkdb creates a capability hash database for quick retrieval of capability
1.1 deraadt 68: * records. The database contains 2 types of entries: records and references
69: * marked by the first byte in the data. A record entry contains the actual
70: * capability record whereas a reference contains the name (key) under which
71: * the correct record is stored.
72: */
73: int
1.11 deraadt 74: main(int argc, char *argv[])
1.1 deraadt 75: {
76: int c;
77:
78: capname = NULL;
1.4 tholo 79: while ((c = getopt(argc, argv, "f:iv")) != -1) {
1.1 deraadt 80: switch(c) {
81: case 'f':
82: capname = optarg;
83: break;
84: case 'v':
85: verbose = 1;
86: break;
1.6 naddy 87: case 'i':
1.4 tholo 88: info = 1;
89: break;
1.1 deraadt 90: case '?':
91: default:
92: usage();
93: }
94: }
95: argc -= optind;
96: argv += optind;
97:
98: if (*argv == NULL)
99: usage();
100:
101: /*
102: * The database file is the first argument if no name is specified.
1.7 millert 103: * Make arrangements to unlink it if we exit badly.
1.1 deraadt 104: */
105: (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv);
106: if ((capname = strdup(buf)) == NULL)
1.12 millert 107: err(1, NULL);
1.1 deraadt 108: if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR,
109: DEFFILEMODE, DB_HASH, &openinfo)) == NULL)
110: err(1, "%s", buf);
111:
112: if (atexit(dounlink))
113: err(1, "atexit");
114:
115: db_build(argv);
116:
117: if (capdbp->close(capdbp) < 0)
118: err(1, "%s", capname);
119: capname = NULL;
120: exit(0);
121: }
122:
123: void
1.11 deraadt 124: dounlink(void)
1.1 deraadt 125: {
126: if (capname != NULL)
127: (void)unlink(capname);
128: }
129:
130: /*
131: * Any changes to these definitions should be made also in the getcap(3)
132: * library routines.
133: */
134: #define RECOK (char)0
135: #define TCERR (char)1
136: #define SHADOW (char)2
137:
138: /*
1.6 naddy 139: * db_build() builds the name and capability databases according to the
1.1 deraadt 140: * details above.
141: */
142: void
1.11 deraadt 143: db_build(char **ifiles)
1.1 deraadt 144: {
145: DBT key, data;
146: recno_t reccnt;
147: size_t len, bplen;
148: int st;
1.15 nicm 149: char *bp, *p, *t, *out, ch;
1.7 millert 150:
151: cgetusedb(0); /* disable reading of .db files in getcap(3) */
1.1 deraadt 152:
153: data.data = NULL;
154: key.data = NULL;
1.4 tholo 155: for (reccnt = 0, bplen = 0;
156: (st = (info ? igetnext(&bp, ifiles) : cgetnext(&bp, ifiles))) > 0;) {
1.1 deraadt 157:
158: /*
1.15 nicm 159: * Allocate enough memory to store four times the size of the
160: * record (so an existing ':' can be expanded to '\072' for
161: * terminfo) plus a terminating NULL and one extra byte.
1.1 deraadt 162: */
163: len = strlen(bp);
1.15 nicm 164: if (bplen <= 4 * len + 2) {
165: int newbplen = bplen + MAX(256, 4 * len + 2);
1.13 tedu 166: void *newdata;
167:
168: if ((newdata = realloc(data.data, newbplen)) == NULL)
1.12 millert 169: err(1, NULL);
1.13 tedu 170: data.data = newdata;
171: bplen = newbplen;
1.1 deraadt 172: }
173:
174: /* Find the end of the name field. */
1.4 tholo 175: if ((p = strchr(bp, info ? ',' : ':')) == NULL) {
1.8 deraadt 176: warnx("no name field: %.*s", (int)MIN(len, 20), bp);
1.1 deraadt 177: continue;
178: }
179:
180: /* First byte of stored record indicates status. */
181: switch(st) {
182: case 1:
183: ((char *)(data.data))[0] = RECOK;
184: break;
185: case 2:
186: ((char *)(data.data))[0] = TCERR;
1.4 tholo 187: warnx("Record not tc expanded: %.*s", (int)(p - bp), bp);
1.1 deraadt 188: break;
189: }
190:
191: /* Create the stored record. */
1.4 tholo 192: if (info) {
1.15 nicm 193: /*
194: * The record separator is :, so it is necessary to
195: * change commas into colons. However, \, should be
196: * left alone, unless the \ is the last part of ^\.
197: */
1.5 millert 198: data.size = len + 2;
1.15 nicm 199: out = ((char *) data.data) + 1;
200: t = bp;
201: while (t < bp + len) {
202: switch (ch = *t++) {
203: case '^':
204: case '\\':
205: *out++ = ch;
206: if (*t != '\0')
207: *out++ = *t++;
208: break;
209: case ':':
210: memcpy(out, "\\072", 4);
211: out += 4;
212: data.size += 3; /* : already counted */
213: break;
214: case ',':
215: *out++ = ':';
216: break;
217: default:
218: *out++ = ch;
219: break;
220: }
221: }
222: *out++ = '\0';
1.4 tholo 223: if (memchr((char *)data.data + 1, '\0', data.size - 2)) {
224: warnx("NUL in entry: %.*s", (int)MIN(len, 20), bp);
225: continue;
226: }
1.5 millert 227: } else {
228: char *capbeg, *capend;
229:
230: t = (char *)data.data + 1;
231: /* Copy the cap name and trailing ':' */
232: len = p - bp + 1;
233: memcpy(t, bp, len);
234: t += len;
235:
236: /* Copy entry, collapsing empty fields. */
237: capbeg = p + 1;
238: while (*capbeg) {
239: /* Skip empty fields. */
240: if ((len = strspn(capbeg, ": \t\n\r")))
241: capbeg += len;
242:
243: /* Find the end of this cap and copy it w/ : */
244: capend = strchr(capbeg, ':');
245: if (capend)
246: len = capend - capbeg + 1;
247: else
248: len = strlen(capbeg);
249: memcpy(t, capbeg, len);
250: t += len;
251: capbeg += len;
252: }
253: *t = '\0';
254: data.size = t - (char *)data.data + 1;
1.4 tholo 255: }
1.1 deraadt 256:
257: /* Store the record under the name field. */
258: key.data = bp;
259: key.size = p - bp;
260:
261: switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) {
262: case -1:
263: err(1, "put");
264: /* NOTREACHED */
265: case 1:
266: warnx("ignored duplicate: %.*s",
1.4 tholo 267: (int)key.size, (char *)key.data);
1.1 deraadt 268: continue;
269: }
270: ++reccnt;
271:
272: /* If only one name, ignore the rest. */
273: if ((p = strchr(bp, '|')) == NULL)
274: continue;
275:
276: /* The rest of the names reference the entire name. */
277: ((char *)(data.data))[0] = SHADOW;
1.4 tholo 278: (void) memmove(&((u_char *)(data.data))[1], key.data, key.size);
1.1 deraadt 279: data.size = key.size + 1;
280:
281: /* Store references for other names. */
282: for (p = t = bp;; ++p) {
1.4 tholo 283: if (p > t && (*p == (info ? ',' : ':') || *p == '|')) {
1.1 deraadt 284: key.size = p - t;
285: key.data = t;
286: switch(capdbp->put(capdbp,
287: &key, &data, R_NOOVERWRITE)) {
288: case -1:
289: err(1, "put");
290: /* NOTREACHED */
291: case 1:
292: warnx("ignored duplicate: %.*s",
1.4 tholo 293: (int)key.size, (char *)key.data);
1.1 deraadt 294: }
295: t = p + 1;
296: }
1.4 tholo 297: if (*p == (info ? ',' : ':'))
1.1 deraadt 298: break;
299: }
1.14 otto 300: free(bp);
1.1 deraadt 301: }
302:
303: switch(st) {
304: case -1:
305: err(1, "file argument");
306: /* NOTREACHED */
307: case -2:
308: errx(1, "potential reference loop detected");
309: /* NOTREACHED */
310: }
311:
312: if (verbose)
313: (void)printf("cap_mkdb: %d capability records\n", reccnt);
314: }
315:
316: void
1.11 deraadt 317: usage(void)
1.1 deraadt 318: {
319: (void)fprintf(stderr,
1.4 tholo 320: "usage: cap_mkdb [-iv] [-f outfile] file1 [file2 ...]\n");
1.1 deraadt 321: exit(1);
322: }