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1.19 ! deraadt 1: /* $OpenBSD: cap_mkdb.c,v 1.18 2011/07/04 21:34:54 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/stat.h>
34:
35: #include <db.h>
36: #include <err.h>
37: #include <errno.h>
38: #include <fcntl.h>
39: #include <limits.h>
40: #include <stdio.h>
41: #include <stdlib.h>
42: #include <string.h>
1.4 tholo 43: #include <ctype.h>
1.1 deraadt 44: #include <unistd.h>
45:
1.19 ! deraadt 46: #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
! 47: #define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
! 48:
1.9 millert 49: void db_build(char **);
50: void dounlink(void);
51: void usage(void);
52: int igetnext(char **, char **);
53: int main(int, char *[]);
1.1 deraadt 54:
55: DB *capdbp;
1.4 tholo 56: int info, verbose;
57: char *capname, buf[8 * 1024];
1.1 deraadt 58:
59: HASHINFO openinfo = {
60: 4096, /* bsize */
61: 16, /* ffactor */
62: 256, /* nelem */
63: 2048 * 1024, /* cachesize */
64: NULL, /* hash() */
65: 0 /* lorder */
66: };
67:
68: /*
1.4 tholo 69: * cap_mkdb creates a capability hash database for quick retrieval of capability
1.1 deraadt 70: * records. The database contains 2 types of entries: records and references
71: * marked by the first byte in the data. A record entry contains the actual
72: * capability record whereas a reference contains the name (key) under which
73: * the correct record is stored.
74: */
75: int
1.11 deraadt 76: main(int argc, char *argv[])
1.1 deraadt 77: {
78: int c;
79:
80: capname = NULL;
1.4 tholo 81: while ((c = getopt(argc, argv, "f:iv")) != -1) {
1.1 deraadt 82: switch(c) {
83: case 'f':
84: capname = optarg;
85: break;
86: case 'v':
87: verbose = 1;
88: break;
1.6 naddy 89: case 'i':
1.4 tholo 90: info = 1;
91: break;
1.1 deraadt 92: case '?':
93: default:
94: usage();
95: }
96: }
97: argc -= optind;
98: argv += optind;
99:
100: if (*argv == NULL)
101: usage();
102:
103: /*
104: * The database file is the first argument if no name is specified.
1.7 millert 105: * Make arrangements to unlink it if we exit badly.
1.1 deraadt 106: */
107: (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv);
108: if ((capname = strdup(buf)) == NULL)
1.12 millert 109: err(1, NULL);
1.1 deraadt 110: if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR,
111: DEFFILEMODE, DB_HASH, &openinfo)) == NULL)
112: err(1, "%s", buf);
113:
114: if (atexit(dounlink))
115: err(1, "atexit");
116:
117: db_build(argv);
118:
119: if (capdbp->close(capdbp) < 0)
120: err(1, "%s", capname);
121: capname = NULL;
122: exit(0);
123: }
124:
125: void
1.11 deraadt 126: dounlink(void)
1.1 deraadt 127: {
128: if (capname != NULL)
129: (void)unlink(capname);
130: }
131:
132: /*
133: * Any changes to these definitions should be made also in the getcap(3)
134: * library routines.
135: */
136: #define RECOK (char)0
137: #define TCERR (char)1
138: #define SHADOW (char)2
139:
140: /*
1.6 naddy 141: * db_build() builds the name and capability databases according to the
1.1 deraadt 142: * details above.
143: */
144: void
1.11 deraadt 145: db_build(char **ifiles)
1.1 deraadt 146: {
147: DBT key, data;
148: recno_t reccnt;
149: size_t len, bplen;
150: int st;
1.15 nicm 151: char *bp, *p, *t, *out, ch;
1.7 millert 152:
153: cgetusedb(0); /* disable reading of .db files in getcap(3) */
1.1 deraadt 154:
155: data.data = NULL;
156: key.data = NULL;
1.4 tholo 157: for (reccnt = 0, bplen = 0;
158: (st = (info ? igetnext(&bp, ifiles) : cgetnext(&bp, ifiles))) > 0;) {
1.1 deraadt 159:
160: /*
1.15 nicm 161: * Allocate enough memory to store four times the size of the
162: * record (so an existing ':' can be expanded to '\072' for
163: * terminfo) plus a terminating NULL and one extra byte.
1.1 deraadt 164: */
165: len = strlen(bp);
1.15 nicm 166: if (bplen <= 4 * len + 2) {
1.19 ! deraadt 167: int newbplen = bplen + MAXIMUM(256, 4 * len + 2);
1.13 tedu 168: void *newdata;
169:
170: if ((newdata = realloc(data.data, newbplen)) == NULL)
1.12 millert 171: err(1, NULL);
1.13 tedu 172: data.data = newdata;
173: bplen = newbplen;
1.1 deraadt 174: }
175:
176: /* Find the end of the name field. */
1.4 tholo 177: if ((p = strchr(bp, info ? ',' : ':')) == NULL) {
1.19 ! deraadt 178: warnx("no name field: %.*s", (int)MINIMUM(len, 20), bp);
1.1 deraadt 179: continue;
180: }
181:
182: /* First byte of stored record indicates status. */
183: switch(st) {
184: case 1:
185: ((char *)(data.data))[0] = RECOK;
186: break;
187: case 2:
188: ((char *)(data.data))[0] = TCERR;
1.4 tholo 189: warnx("Record not tc expanded: %.*s", (int)(p - bp), bp);
1.1 deraadt 190: break;
191: }
192:
193: /* Create the stored record. */
1.4 tholo 194: if (info) {
1.15 nicm 195: /*
196: * The record separator is :, so it is necessary to
197: * change commas into colons. However, \, should be
198: * left alone, unless the \ is the last part of ^\.
199: */
1.5 millert 200: data.size = len + 2;
1.15 nicm 201: out = ((char *) data.data) + 1;
202: t = bp;
203: while (t < bp + len) {
204: switch (ch = *t++) {
205: case '^':
206: case '\\':
207: *out++ = ch;
208: if (*t != '\0')
209: *out++ = *t++;
210: break;
211: case ':':
212: memcpy(out, "\\072", 4);
213: out += 4;
214: data.size += 3; /* : already counted */
215: break;
216: case ',':
217: *out++ = ':';
218: break;
219: default:
220: *out++ = ch;
221: break;
222: }
223: }
224: *out++ = '\0';
1.4 tholo 225: if (memchr((char *)data.data + 1, '\0', data.size - 2)) {
1.19 ! deraadt 226: warnx("NUL in entry: %.*s", (int)MINIMUM(len, 20), bp);
1.4 tholo 227: continue;
228: }
1.5 millert 229: } else {
230: char *capbeg, *capend;
231:
232: t = (char *)data.data + 1;
233: /* Copy the cap name and trailing ':' */
234: len = p - bp + 1;
235: memcpy(t, bp, len);
236: t += len;
237:
238: /* Copy entry, collapsing empty fields. */
239: capbeg = p + 1;
240: while (*capbeg) {
241: /* Skip empty fields. */
242: if ((len = strspn(capbeg, ": \t\n\r")))
243: capbeg += len;
244:
245: /* Find the end of this cap and copy it w/ : */
246: capend = strchr(capbeg, ':');
247: if (capend)
248: len = capend - capbeg + 1;
249: else
250: len = strlen(capbeg);
251: memcpy(t, capbeg, len);
252: t += len;
253: capbeg += len;
254: }
255: *t = '\0';
256: data.size = t - (char *)data.data + 1;
1.4 tholo 257: }
1.1 deraadt 258:
259: /* Store the record under the name field. */
260: key.data = bp;
261: key.size = p - bp;
262:
263: switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) {
264: case -1:
265: err(1, "put");
266: /* NOTREACHED */
267: case 1:
268: warnx("ignored duplicate: %.*s",
1.4 tholo 269: (int)key.size, (char *)key.data);
1.1 deraadt 270: continue;
271: }
272: ++reccnt;
273:
274: /* If only one name, ignore the rest. */
275: if ((p = strchr(bp, '|')) == NULL)
276: continue;
277:
278: /* The rest of the names reference the entire name. */
279: ((char *)(data.data))[0] = SHADOW;
1.4 tholo 280: (void) memmove(&((u_char *)(data.data))[1], key.data, key.size);
1.1 deraadt 281: data.size = key.size + 1;
282:
283: /* Store references for other names. */
284: for (p = t = bp;; ++p) {
1.4 tholo 285: if (p > t && (*p == (info ? ',' : ':') || *p == '|')) {
1.1 deraadt 286: key.size = p - t;
287: key.data = t;
1.17 nicm 288:
289: /*
290: * If this is the last entry and contains any
291: * spaces, it is a description rather than an
292: * alias, so skip it and break.
293: */
1.18 nicm 294: if (*p != '|' &&
1.17 nicm 295: memchr(key.data, ' ', key.size) != NULL)
296: break;
1.18 nicm 297:
1.1 deraadt 298: switch(capdbp->put(capdbp,
299: &key, &data, R_NOOVERWRITE)) {
300: case -1:
301: err(1, "put");
302: /* NOTREACHED */
303: case 1:
304: warnx("ignored duplicate: %.*s",
1.4 tholo 305: (int)key.size, (char *)key.data);
1.1 deraadt 306: }
307: t = p + 1;
308: }
1.4 tholo 309: if (*p == (info ? ',' : ':'))
1.1 deraadt 310: break;
311: }
1.14 otto 312: free(bp);
1.1 deraadt 313: }
314:
315: switch(st) {
316: case -1:
317: err(1, "file argument");
318: /* NOTREACHED */
319: case -2:
320: errx(1, "potential reference loop detected");
321: /* NOTREACHED */
322: }
323:
324: if (verbose)
325: (void)printf("cap_mkdb: %d capability records\n", reccnt);
326: }
327:
328: void
1.11 deraadt 329: usage(void)
1.1 deraadt 330: {
331: (void)fprintf(stderr,
1.4 tholo 332: "usage: cap_mkdb [-iv] [-f outfile] file1 [file2 ...]\n");
1.1 deraadt 333: exit(1);
334: }