1 |
|
|
/* $OpenBSD: getent.c,v 1.14 2016/02/01 19:57:28 jca Exp $ */ |
2 |
|
|
/* $NetBSD: getent.c,v 1.7 2005/08/24 14:31:02 ginsbach Exp $ */ |
3 |
|
|
|
4 |
|
|
/*- |
5 |
|
|
* Copyright (c) 2004 The NetBSD Foundation, Inc. |
6 |
|
|
* All rights reserved. |
7 |
|
|
* |
8 |
|
|
* This code is derived from software contributed to The NetBSD Foundation |
9 |
|
|
* by Luke Mewburn. |
10 |
|
|
* |
11 |
|
|
* Redistribution and use in source and binary forms, with or without |
12 |
|
|
* modification, are permitted provided that the following conditions |
13 |
|
|
* are met: |
14 |
|
|
* 1. Redistributions of source code must retain the above copyright |
15 |
|
|
* notice, this list of conditions and the following disclaimer. |
16 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
17 |
|
|
* notice, this list of conditions and the following disclaimer in the |
18 |
|
|
* documentation and/or other materials provided with the distribution. |
19 |
|
|
* |
20 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 |
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 |
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 |
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 |
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 |
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 |
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 |
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 |
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 |
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 |
|
|
* POSSIBILITY OF SUCH DAMAGE. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <sys/types.h> |
34 |
|
|
#include <sys/socket.h> |
35 |
|
|
|
36 |
|
|
#include <ctype.h> |
37 |
|
|
#include <err.h> |
38 |
|
|
#include <errno.h> |
39 |
|
|
#include <grp.h> |
40 |
|
|
#include <limits.h> |
41 |
|
|
#include <netdb.h> |
42 |
|
|
#include <pwd.h> |
43 |
|
|
#include <stdio.h> |
44 |
|
|
#include <stdarg.h> |
45 |
|
|
#include <stdlib.h> |
46 |
|
|
#include <string.h> |
47 |
|
|
#include <unistd.h> |
48 |
|
|
|
49 |
|
|
#include <net/if.h> |
50 |
|
|
#include <netinet/in.h> /* for INET6_ADDRSTRLEN */ |
51 |
|
|
#include <netinet/if_ether.h> |
52 |
|
|
|
53 |
|
|
#include <arpa/inet.h> |
54 |
|
|
#include <arpa/nameser.h> |
55 |
|
|
|
56 |
|
|
#include <rpc/rpc.h> |
57 |
|
|
|
58 |
|
|
static int usage(void); |
59 |
|
|
static int ethers(int, char *[]); |
60 |
|
|
static int group(int, char *[]); |
61 |
|
|
static int hosts(int, char *[]); |
62 |
|
|
static int passwd(int, char *[]); |
63 |
|
|
static int protocols(int, char *[]); |
64 |
|
|
static int rpc(int, char *[]); |
65 |
|
|
static int services(int, char *[]); |
66 |
|
|
static int shells(int, char *[]); |
67 |
|
|
extern char *__progname; |
68 |
|
|
|
69 |
|
|
enum { |
70 |
|
|
RV_OK = 0, |
71 |
|
|
RV_USAGE = 1, |
72 |
|
|
RV_NOTFOUND = 2, |
73 |
|
|
RV_NOENUM = 3 |
74 |
|
|
}; |
75 |
|
|
|
76 |
|
|
static struct getentdb { |
77 |
|
|
const char *name; |
78 |
|
|
int (*fn)(int, char *[]); |
79 |
|
|
const char *pledge; |
80 |
|
|
} databases[] = { |
81 |
|
|
{ "ethers", ethers, "stdio rpath" }, |
82 |
|
|
{ "group", group, "stdio getpw" }, |
83 |
|
|
{ "hosts", hosts, "stdio dns" }, |
84 |
|
|
{ "passwd", passwd, "stdio getpw" }, |
85 |
|
|
{ "protocols", protocols, "stdio rpath" }, |
86 |
|
|
{ "rpc", rpc, "stdio rpath" }, |
87 |
|
|
{ "services", services, "stdio rpath" }, |
88 |
|
|
{ "shells", shells, "stdio rpath" }, |
89 |
|
|
|
90 |
|
|
{ NULL, NULL, }, |
91 |
|
|
}; |
92 |
|
|
|
93 |
|
|
int |
94 |
|
|
main(int argc, char *argv[]) |
95 |
|
|
{ |
96 |
|
|
struct getentdb *curdb; |
97 |
|
|
|
98 |
|
|
if (pledge("stdio dns rpath getpw wpath cpath", NULL) == -1) |
99 |
|
|
err(1, "pledge"); |
100 |
|
|
|
101 |
|
|
if (argc < 2) |
102 |
|
|
usage(); |
103 |
|
|
for (curdb = databases; curdb->name != NULL; curdb++) { |
104 |
|
|
if (strcmp(curdb->name, argv[1]) == 0) { |
105 |
|
|
if (pledge(curdb->pledge, NULL) == -1) |
106 |
|
|
err(1, "pledge"); |
107 |
|
|
|
108 |
|
|
exit(curdb->fn(argc, argv)); |
109 |
|
|
break; |
110 |
|
|
} |
111 |
|
|
} |
112 |
|
|
fprintf(stderr, "%s: unknown database: %s\n", __progname, argv[1]); |
113 |
|
|
return RV_USAGE; |
114 |
|
|
} |
115 |
|
|
|
116 |
|
|
static int |
117 |
|
|
usage(void) |
118 |
|
|
{ |
119 |
|
|
fprintf(stderr, "usage: %s database [key ...]\n", __progname); |
120 |
|
|
exit(RV_USAGE); |
121 |
|
|
/* NOTREACHED */ |
122 |
|
|
} |
123 |
|
|
|
124 |
|
|
/* |
125 |
|
|
* printfmtstrings -- |
126 |
|
|
* vprintf(format, ...), |
127 |
|
|
* then the aliases (beginning with prefix, separated by sep), |
128 |
|
|
* then a newline |
129 |
|
|
*/ |
130 |
|
|
static void |
131 |
|
|
printfmtstrings(char *strings[], const char *prefix, const char *sep, |
132 |
|
|
const char *fmt, ...) |
133 |
|
|
{ |
134 |
|
|
va_list ap; |
135 |
|
|
const char *curpref; |
136 |
|
|
int i; |
137 |
|
|
|
138 |
|
|
va_start(ap, fmt); |
139 |
|
|
vprintf(fmt, ap); |
140 |
|
|
va_end(ap); |
141 |
|
|
|
142 |
|
|
curpref = prefix; |
143 |
|
|
for (i = 0; strings[i] != NULL; i++) { |
144 |
|
|
printf("%s%s", curpref, strings[i]); |
145 |
|
|
curpref = sep; |
146 |
|
|
} |
147 |
|
|
printf("\n"); |
148 |
|
|
} |
149 |
|
|
|
150 |
|
|
#define ETHERSPRINT printf("%-17s %s\n", ether_ntoa(eap), hp) |
151 |
|
|
|
152 |
|
|
static int |
153 |
|
|
ethers(int argc, char *argv[]) |
154 |
|
|
{ |
155 |
|
|
char hostname[HOST_NAME_MAX+1], *hp; |
156 |
|
|
int i, rv = RV_OK; |
157 |
|
|
struct ether_addr ea, *eap; |
158 |
|
|
|
159 |
|
|
if (argc == 2) { |
160 |
|
|
fprintf(stderr, "%s: Enumeration not supported on ethers\n", |
161 |
|
|
__progname); |
162 |
|
|
rv = RV_NOENUM; |
163 |
|
|
} else { |
164 |
|
|
for (i = 2; i < argc; i++) { |
165 |
|
|
if ((eap = ether_aton(argv[i])) == NULL) { |
166 |
|
|
eap = &ea; |
167 |
|
|
hp = argv[i]; |
168 |
|
|
if (ether_hostton(hp, eap) != 0) { |
169 |
|
|
rv = RV_NOTFOUND; |
170 |
|
|
break; |
171 |
|
|
} |
172 |
|
|
} else { |
173 |
|
|
hp = hostname; |
174 |
|
|
if (ether_ntohost(hp, eap) != 0) { |
175 |
|
|
rv = RV_NOTFOUND; |
176 |
|
|
break; |
177 |
|
|
} |
178 |
|
|
} |
179 |
|
|
ETHERSPRINT; |
180 |
|
|
} |
181 |
|
|
} |
182 |
|
|
return rv; |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
#define GROUPPRINT \ |
186 |
|
|
printfmtstrings(gr->gr_mem, ":", ",", "%s:%s:%u", \ |
187 |
|
|
gr->gr_name, gr->gr_passwd, gr->gr_gid) |
188 |
|
|
|
189 |
|
|
static int |
190 |
|
|
group(int argc, char *argv[]) |
191 |
|
|
{ |
192 |
|
|
int i, rv = RV_OK; |
193 |
|
|
struct group *gr; |
194 |
|
|
|
195 |
|
|
setgroupent(1); |
196 |
|
|
if (argc == 2) { |
197 |
|
|
while ((gr = getgrent()) != NULL) |
198 |
|
|
GROUPPRINT; |
199 |
|
|
} else { |
200 |
|
|
for (i = 2; i < argc; i++) { |
201 |
|
|
const char *err; |
202 |
|
|
long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
203 |
|
|
|
204 |
|
|
if (!err) |
205 |
|
|
gr = getgrgid((gid_t)id); |
206 |
|
|
else |
207 |
|
|
gr = getgrnam(argv[i]); |
208 |
|
|
if (gr != NULL) |
209 |
|
|
GROUPPRINT; |
210 |
|
|
else { |
211 |
|
|
rv = RV_NOTFOUND; |
212 |
|
|
break; |
213 |
|
|
} |
214 |
|
|
} |
215 |
|
|
} |
216 |
|
|
endgrent(); |
217 |
|
|
return rv; |
218 |
|
|
} |
219 |
|
|
|
220 |
|
|
static void |
221 |
|
|
hostsprint(const struct hostent *he) |
222 |
|
|
{ |
223 |
|
|
char buf[INET6_ADDRSTRLEN]; |
224 |
|
|
|
225 |
|
|
if (inet_ntop(he->h_addrtype, he->h_addr, buf, sizeof(buf)) == NULL) |
226 |
|
|
strlcpy(buf, "# unknown", sizeof(buf)); |
227 |
|
|
printfmtstrings(he->h_aliases, " ", " ", "%-16s %s", buf, he->h_name); |
228 |
|
|
} |
229 |
|
|
static int |
230 |
|
|
hostsaddrinfo(char* name) |
231 |
|
|
{ |
232 |
|
|
struct addrinfo hints, *res, *res0; |
233 |
|
|
void *src; |
234 |
|
|
int rv; |
235 |
|
|
char buf[INET6_ADDRSTRLEN]; |
236 |
|
|
|
237 |
|
|
rv = RV_NOTFOUND; |
238 |
|
|
memset(buf, 0, sizeof(buf)); |
239 |
|
|
memset(&hints, 0, sizeof(hints)); |
240 |
|
|
hints.ai_family = PF_UNSPEC; |
241 |
|
|
hints.ai_socktype = SOCK_DGRAM; |
242 |
|
|
|
243 |
|
|
if (getaddrinfo(name, NULL, &hints, &res0) == 0) { |
244 |
|
|
for (res = res0; res; res = res->ai_next) { |
245 |
|
|
switch (res->ai_family) { |
246 |
|
|
case AF_INET: |
247 |
|
|
src = &((struct sockaddr_in*) |
248 |
|
|
res->ai_addr)->sin_addr; |
249 |
|
|
break; |
250 |
|
|
case AF_INET6: |
251 |
|
|
src = &((struct sockaddr_in6*) |
252 |
|
|
res->ai_addr)->sin6_addr; |
253 |
|
|
break; |
254 |
|
|
default: /* not reached */ |
255 |
|
|
src = NULL; |
256 |
|
|
} |
257 |
|
|
if (src==NULL || inet_ntop(res->ai_family, src, buf, |
258 |
|
|
sizeof(buf)) == NULL) |
259 |
|
|
strlcpy(buf, "# unknown", sizeof(buf)); |
260 |
|
|
else |
261 |
|
|
rv = RV_OK; |
262 |
|
|
printf("%-39s %s\n", buf, name); |
263 |
|
|
} |
264 |
|
|
freeaddrinfo(res0); |
265 |
|
|
} |
266 |
|
|
|
267 |
|
|
return (rv); |
268 |
|
|
} |
269 |
|
|
|
270 |
|
|
static int |
271 |
|
|
hosts(int argc, char *argv[]) |
272 |
|
|
{ |
273 |
|
|
char addr[IN6ADDRSZ]; |
274 |
|
|
int i, rv = RV_OK; |
275 |
|
|
struct hostent *he; |
276 |
|
|
|
277 |
|
|
if (argc == 2) { |
278 |
|
|
fprintf(stderr, "%s: Enumeration not supported on hosts\n", |
279 |
|
|
__progname); |
280 |
|
|
rv = RV_NOENUM; |
281 |
|
|
} else { |
282 |
|
|
for (i = 2; i < argc; i++) { |
283 |
|
|
he = NULL; |
284 |
|
|
if (inet_pton(AF_INET6, argv[i], (void *)addr) > 0) |
285 |
|
|
he = gethostbyaddr(addr, IN6ADDRSZ, AF_INET6); |
286 |
|
|
else if (inet_pton(AF_INET, argv[i], (void *)addr) > 0) |
287 |
|
|
he = gethostbyaddr(addr, INADDRSZ, AF_INET); |
288 |
|
|
if (he != NULL) |
289 |
|
|
hostsprint(he); |
290 |
|
|
else if ((rv = hostsaddrinfo(argv[i])) == RV_NOTFOUND) |
291 |
|
|
break; |
292 |
|
|
} |
293 |
|
|
} |
294 |
|
|
return rv; |
295 |
|
|
} |
296 |
|
|
|
297 |
|
|
#define PASSWDPRINT \ |
298 |
|
|
printf("%s:%s:%u:%u:%s:%s:%s\n", \ |
299 |
|
|
pw->pw_name, pw->pw_passwd, pw->pw_uid, \ |
300 |
|
|
pw->pw_gid, pw->pw_gecos, pw->pw_dir, pw->pw_shell) |
301 |
|
|
|
302 |
|
|
static int |
303 |
|
|
passwd(int argc, char *argv[]) |
304 |
|
|
{ |
305 |
|
|
int i, rv = RV_OK; |
306 |
|
|
struct passwd *pw; |
307 |
|
|
|
308 |
|
|
setpassent(1); |
309 |
|
|
if (argc == 2) { |
310 |
|
|
while ((pw = getpwent()) != NULL) |
311 |
|
|
PASSWDPRINT; |
312 |
|
|
} else { |
313 |
|
|
for (i = 2; i < argc; i++) { |
314 |
|
|
const char *err; |
315 |
|
|
long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
316 |
|
|
|
317 |
|
|
if (!err) |
318 |
|
|
pw = getpwuid((uid_t)id); |
319 |
|
|
else |
320 |
|
|
pw = getpwnam(argv[i]); |
321 |
|
|
if (pw != NULL) |
322 |
|
|
PASSWDPRINT; |
323 |
|
|
else { |
324 |
|
|
rv = RV_NOTFOUND; |
325 |
|
|
break; |
326 |
|
|
} |
327 |
|
|
} |
328 |
|
|
} |
329 |
|
|
endpwent(); |
330 |
|
|
return rv; |
331 |
|
|
} |
332 |
|
|
|
333 |
|
|
#define PROTOCOLSPRINT \ |
334 |
|
|
printfmtstrings(pe->p_aliases, " ", " ", \ |
335 |
|
|
"%-16s %5d", pe->p_name, pe->p_proto) |
336 |
|
|
|
337 |
|
|
static int |
338 |
|
|
protocols(int argc, char *argv[]) |
339 |
|
|
{ |
340 |
|
|
struct protoent *pe; |
341 |
|
|
int i, rv = RV_OK; |
342 |
|
|
|
343 |
|
|
setprotoent(1); |
344 |
|
|
if (argc == 2) { |
345 |
|
|
while ((pe = getprotoent()) != NULL) |
346 |
|
|
PROTOCOLSPRINT; |
347 |
|
|
} else { |
348 |
|
|
for (i = 2; i < argc; i++) { |
349 |
|
|
const char *err; |
350 |
|
|
long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
351 |
|
|
|
352 |
|
|
if (!err) |
353 |
|
|
pe = getprotobynumber((int)id); |
354 |
|
|
else |
355 |
|
|
pe = getprotobyname(argv[i]); |
356 |
|
|
if (pe != NULL) |
357 |
|
|
PROTOCOLSPRINT; |
358 |
|
|
else { |
359 |
|
|
rv = RV_NOTFOUND; |
360 |
|
|
break; |
361 |
|
|
} |
362 |
|
|
} |
363 |
|
|
} |
364 |
|
|
endprotoent(); |
365 |
|
|
return rv; |
366 |
|
|
} |
367 |
|
|
|
368 |
|
|
#define RPCPRINT \ |
369 |
|
|
printfmtstrings(re->r_aliases, " ", " ", \ |
370 |
|
|
"%-16s %6d", re->r_name, re->r_number) |
371 |
|
|
|
372 |
|
|
static int |
373 |
|
|
rpc(int argc, char *argv[]) |
374 |
|
|
{ |
375 |
|
|
struct rpcent *re; |
376 |
|
|
int i, rv = RV_OK; |
377 |
|
|
|
378 |
|
|
setrpcent(1); |
379 |
|
|
if (argc == 2) { |
380 |
|
|
while ((re = getrpcent()) != NULL) |
381 |
|
|
RPCPRINT; |
382 |
|
|
} else { |
383 |
|
|
for (i = 2; i < argc; i++) { |
384 |
|
|
const char *err; |
385 |
|
|
long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
386 |
|
|
|
387 |
|
|
if (!err) |
388 |
|
|
re = getrpcbynumber((int)id); |
389 |
|
|
else |
390 |
|
|
re = getrpcbyname(argv[i]); |
391 |
|
|
if (re != NULL) |
392 |
|
|
RPCPRINT; |
393 |
|
|
else { |
394 |
|
|
rv = RV_NOTFOUND; |
395 |
|
|
break; |
396 |
|
|
} |
397 |
|
|
} |
398 |
|
|
} |
399 |
|
|
endrpcent(); |
400 |
|
|
return rv; |
401 |
|
|
} |
402 |
|
|
|
403 |
|
|
#define SERVICESPRINT \ |
404 |
|
|
printfmtstrings(se->s_aliases, " ", " ", \ |
405 |
|
|
"%-16s %5d/%s", se->s_name, ntohs(se->s_port), se->s_proto) |
406 |
|
|
|
407 |
|
|
static int |
408 |
|
|
services(int argc, char *argv[]) |
409 |
|
|
{ |
410 |
|
|
struct servent *se; |
411 |
|
|
int i, rv = RV_OK; |
412 |
|
|
|
413 |
|
|
setservent(1); |
414 |
|
|
if (argc == 2) { |
415 |
|
|
while ((se = getservent()) != NULL) |
416 |
|
|
SERVICESPRINT; |
417 |
|
|
} else { |
418 |
|
|
for (i = 2; i < argc; i++) { |
419 |
|
|
const char *err; |
420 |
|
|
long long id; |
421 |
|
|
char *proto = strchr(argv[i], '/'); |
422 |
|
|
|
423 |
|
|
if (proto != NULL) |
424 |
|
|
*proto++ = '\0'; |
425 |
|
|
id = strtonum(argv[i], 0, UINT_MAX, &err); |
426 |
|
|
if (!err) |
427 |
|
|
se = getservbyport(htons((u_short)id), proto); |
428 |
|
|
else |
429 |
|
|
se = getservbyname(argv[i], proto); |
430 |
|
|
if (se != NULL) |
431 |
|
|
SERVICESPRINT; |
432 |
|
|
else { |
433 |
|
|
rv = RV_NOTFOUND; |
434 |
|
|
break; |
435 |
|
|
} |
436 |
|
|
} |
437 |
|
|
} |
438 |
|
|
endservent(); |
439 |
|
|
return rv; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
#define SHELLSPRINT printf("%s\n", sh) |
443 |
|
|
|
444 |
|
|
static int |
445 |
|
|
shells(int argc, char *argv[]) |
446 |
|
|
{ |
447 |
|
|
const char *sh; |
448 |
|
|
int i, rv = RV_OK; |
449 |
|
|
|
450 |
|
|
setusershell(); |
451 |
|
|
if (argc == 2) { |
452 |
|
|
while ((sh = getusershell()) != NULL) |
453 |
|
|
SHELLSPRINT; |
454 |
|
|
} else { |
455 |
|
|
for (i = 2; i < argc; i++) { |
456 |
|
|
setusershell(); |
457 |
|
|
while ((sh = getusershell()) != NULL) { |
458 |
|
|
if (strcmp(sh, argv[i]) == 0) { |
459 |
|
|
SHELLSPRINT; |
460 |
|
|
break; |
461 |
|
|
} |
462 |
|
|
} |
463 |
|
|
if (sh == NULL) { |
464 |
|
|
rv = RV_NOTFOUND; |
465 |
|
|
break; |
466 |
|
|
} |
467 |
|
|
} |
468 |
|
|
} |
469 |
|
|
endusershell(); |
470 |
|
|
return rv; |
471 |
|
|
} |