File: | src/usr.bin/cap_mkdb/cap_mkdb.c |
Warning: | line 95, column 2 Value stored to 'argc' is never read |
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1 | /* $OpenBSD: cap_mkdb.c,v 1.25 2020/09/15 07:41:38 kevlo Exp $ */ |
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. |
16 | * 3. Neither the name of the University nor the names of its contributors |
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(*__errno()).h> |
38 | #include <fcntl.h> |
39 | #include <limits.h> |
40 | #include <stdio.h> |
41 | #include <stdlib.h> |
42 | #include <string.h> |
43 | #include <ctype.h> |
44 | #include <unistd.h> |
45 | |
46 | #define MINIMUM(a, b)(((a) < (b)) ? (a) : (b)) (((a) < (b)) ? (a) : (b)) |
47 | #define MAXIMUM(a, b)(((a) > (b)) ? (a) : (b)) (((a) > (b)) ? (a) : (b)) |
48 | |
49 | void db_build(char **); |
50 | void dounlink(void); |
51 | void usage(void); |
52 | |
53 | DB *capdbp; |
54 | int verbose; |
55 | char *capname, buf[8 * 1024]; |
56 | |
57 | HASHINFO openinfo = { |
58 | 4096, /* bsize */ |
59 | 16, /* ffactor */ |
60 | 256, /* nelem */ |
61 | 2048 * 1024, /* cachesize */ |
62 | NULL((void *)0), /* hash() */ |
63 | 0 /* lorder */ |
64 | }; |
65 | |
66 | /* |
67 | * cap_mkdb creates a capability hash database for quick retrieval of capability |
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 |
74 | main(int argc, char *argv[]) |
75 | { |
76 | int c; |
77 | |
78 | if (pledge("stdio rpath wpath cpath", NULL((void *)0)) == -1) |
79 | err(1, "pledge"); |
80 | |
81 | capname = NULL((void *)0); |
82 | while ((c = getopt(argc, argv, "f:iv")) != -1) { |
83 | switch(c) { |
84 | case 'f': |
85 | capname = optarg; |
86 | break; |
87 | case 'v': |
88 | verbose = 1; |
89 | break; |
90 | case '?': |
91 | default: |
92 | usage(); |
93 | } |
94 | } |
95 | argc -= optind; |
Value stored to 'argc' is never read | |
96 | argv += optind; |
97 | |
98 | if (*argv == NULL((void *)0)) |
99 | usage(); |
100 | |
101 | /* |
102 | * The database file is the first argument if no name is specified. |
103 | * Make arrangements to unlink it if we exit badly. |
104 | */ |
105 | (void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv); |
106 | if ((capname = strdup(buf)) == NULL((void *)0)) |
107 | err(1, NULL((void *)0)); |
108 | if ((capdbp = dbopen(capname, O_CREAT0x0200 | O_TRUNC0x0400 | O_RDWR0x0002, |
109 | DEFFILEMODE(0000400|0000200|0000040|0000020|0000004|0000002), DB_HASH, &openinfo)) == NULL((void *)0)) |
110 | err(1, "%s", buf); |
111 | |
112 | if (atexit(dounlink) != 0) |
113 | err(1, "atexit"); |
114 | |
115 | db_build(argv); |
116 | |
117 | if (capdbp->close(capdbp) < 0) |
118 | err(1, "%s", capname); |
119 | capname = NULL((void *)0); |
120 | exit(0); |
121 | } |
122 | |
123 | void |
124 | dounlink(void) |
125 | { |
126 | if (capname != NULL((void *)0)) |
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 (char)0 |
135 | #define TCERR(char)1 (char)1 |
136 | #define SHADOW(char)2 (char)2 |
137 | |
138 | /* |
139 | * db_build() builds the name and capability databases according to the |
140 | * details above. |
141 | */ |
142 | void |
143 | db_build(char **ifiles) |
144 | { |
145 | DBT key, data; |
146 | recno_t reccnt; |
147 | size_t len, bplen; |
148 | int st; |
149 | char *bp, *p, *t, *capbeg, *capend; |
150 | |
151 | cgetusedb(0); /* disable reading of .db files in getcap(3) */ |
152 | |
153 | data.data = NULL((void *)0); |
154 | key.data = NULL((void *)0); |
155 | for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) { |
156 | |
157 | /* |
158 | * Allocate enough memory to store the size of the record plus |
159 | * a terminating NULL and one extra byte. |
160 | */ |
161 | len = strlen(bp); |
162 | if (bplen <= len + 2) { |
163 | int newbplen = bplen + MAXIMUM(256, len + 2)(((256) > (len + 2)) ? (256) : (len + 2)); |
164 | void *newdata; |
165 | |
166 | if ((newdata = realloc(data.data, newbplen)) == NULL((void *)0)) |
167 | err(1, NULL((void *)0)); |
168 | data.data = newdata; |
169 | bplen = newbplen; |
170 | } |
171 | |
172 | /* Find the end of the name field. */ |
173 | if ((p = strchr(bp, ':')) == NULL((void *)0)) { |
174 | warnx("no name field: %.*s", (int)MINIMUM(len, 20)(((len) < (20)) ? (len) : (20)), bp); |
175 | continue; |
176 | } |
177 | |
178 | /* First byte of stored record indicates status. */ |
179 | switch(st) { |
180 | case 1: |
181 | ((char *)(data.data))[0] = RECOK(char)0; |
182 | break; |
183 | case 2: |
184 | ((char *)(data.data))[0] = TCERR(char)1; |
185 | warnx("Record not tc expanded: %.*s", (int)(p - bp), bp); |
186 | break; |
187 | } |
188 | |
189 | /* Create the stored record. */ |
190 | t = (char *)data.data + 1; |
191 | /* Copy the cap name and trailing ':' */ |
192 | len = p - bp + 1; |
193 | memcpy(t, bp, len); |
194 | t += len; |
195 | |
196 | /* Copy entry, collapsing empty fields. */ |
197 | capbeg = p + 1; |
198 | while (*capbeg) { |
199 | /* Skip empty fields. */ |
200 | if ((len = strspn(capbeg, ": \t\n\r"))) |
201 | capbeg += len; |
202 | |
203 | /* Find the end of this cap and copy it w/ : */ |
204 | capend = strchr(capbeg, ':'); |
205 | if (capend) |
206 | len = capend - capbeg + 1; |
207 | else |
208 | len = strlen(capbeg); |
209 | memcpy(t, capbeg, len); |
210 | t += len; |
211 | capbeg += len; |
212 | } |
213 | *t = '\0'; |
214 | data.size = t - (char *)data.data + 1; |
215 | |
216 | /* Store the record under the name field. */ |
217 | key.data = bp; |
218 | key.size = p - bp; |
219 | |
220 | switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE8)) { |
221 | case -1: |
222 | err(1, "put"); |
223 | /* NOTREACHED */ |
224 | case 1: |
225 | warnx("ignored duplicate: %.*s", |
226 | (int)key.size, (char *)key.data); |
227 | continue; |
228 | } |
229 | ++reccnt; |
230 | |
231 | /* If only one name, ignore the rest. */ |
232 | if ((p = strchr(bp, '|')) == NULL((void *)0)) |
233 | continue; |
234 | |
235 | /* The rest of the names reference the entire name. */ |
236 | ((char *)(data.data))[0] = SHADOW(char)2; |
237 | (void) memmove(&((u_char *)(data.data))[1], key.data, key.size); |
238 | data.size = key.size + 1; |
239 | |
240 | /* Store references for other names. */ |
241 | for (p = t = bp;; ++p) { |
242 | if (p > t && (*p == ':' || *p == '|')) { |
243 | key.size = p - t; |
244 | key.data = t; |
245 | |
246 | /* |
247 | * If this is the last entry and contains any |
248 | * spaces, it is a description rather than an |
249 | * alias, so skip it and break. |
250 | */ |
251 | if (*p != '|' && |
252 | memchr(key.data, ' ', key.size) != NULL((void *)0)) |
253 | break; |
254 | |
255 | switch(capdbp->put(capdbp, |
256 | &key, &data, R_NOOVERWRITE8)) { |
257 | case -1: |
258 | err(1, "put"); |
259 | /* NOTREACHED */ |
260 | case 1: |
261 | warnx("ignored duplicate: %.*s", |
262 | (int)key.size, (char *)key.data); |
263 | } |
264 | t = p + 1; |
265 | } |
266 | if (*p == ':') |
267 | break; |
268 | } |
269 | free(bp); |
270 | } |
271 | |
272 | switch(st) { |
273 | case -1: |
274 | err(1, "file argument"); |
275 | /* NOTREACHED */ |
276 | case -2: |
277 | errx(1, "potential reference loop detected"); |
278 | /* NOTREACHED */ |
279 | } |
280 | |
281 | if (verbose) |
282 | (void)printf("cap_mkdb: %d capability records\n", reccnt); |
283 | } |
284 | |
285 | void |
286 | usage(void) |
287 | { |
288 | (void)fprintf(stderr(&__sF[2]), |
289 | "usage: cap_mkdb [-v] [-f outfile] file1 [file2 ...]\n"); |
290 | exit(1); |
291 | } |