1 /*-
2 * Copyright (c) 1991, 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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1991, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #endif /* not lint */
35
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)id.c 8.2 (Berkeley) 2/16/94";
39 #endif
40 #endif /* not lint */
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 #include <sys/param.h>
45 #include <sys/mac.h>
46
47 #ifdef USE_BSM_AUDIT
48 #include <bsm/audit.h>
49 #endif
50
51 #include <err.h>
52 #include <errno.h>
53 #include <grp.h>
54 #include <pwd.h>
55 #include <stdint.h>
56 #include <stdio.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <unistd.h>
60
61 static void id_print(struct passwd *, int, int, int);
62 static void pline(struct passwd *);
63 static void pretty(struct passwd *);
64 #ifdef USE_BSM_AUDIT
65 static void auditid(void);
66 #endif
67 static void group(struct passwd *, int);
68 static void maclabel(void);
69 static void usage(void);
70 static struct passwd *who(char *);
71
72 static int isgroups, iswhoami;
73
74 int
main(int argc,char * argv[])75 main(int argc, char *argv[])
76 {
77 struct group *gr;
78 struct passwd *pw;
79 int Gflag, Mflag, Pflag, ch, gflag, id, nflag, pflag, rflag, uflag;
80 int Aflag, cflag;
81 int error;
82 const char *myname;
83 char loginclass[MAXLOGNAME];
84
85 Gflag = Mflag = Pflag = gflag = nflag = pflag = rflag = uflag = 0;
86 Aflag = cflag = 0;
87
88 myname = strrchr(argv[0], '/');
89 myname = (myname != NULL) ? myname + 1 : argv[0];
90 if (strcmp(myname, "groups") == 0) {
91 isgroups = 1;
92 Gflag = nflag = 1;
93 }
94 else if (strcmp(myname, "whoami") == 0) {
95 iswhoami = 1;
96 uflag = nflag = 1;
97 }
98
99 while ((ch = getopt(argc, argv,
100 (isgroups || iswhoami) ? "" : "APGMacgnpru")) != -1)
101 switch(ch) {
102 #ifdef USE_BSM_AUDIT
103 case 'A':
104 Aflag = 1;
105 break;
106 #endif
107 case 'G':
108 Gflag = 1;
109 break;
110 case 'M':
111 Mflag = 1;
112 break;
113 case 'P':
114 Pflag = 1;
115 break;
116 case 'a':
117 break;
118 case 'c':
119 cflag = 1;
120 break;
121 case 'g':
122 gflag = 1;
123 break;
124 case 'n':
125 nflag = 1;
126 break;
127 case 'p':
128 pflag = 1;
129 break;
130 case 'r':
131 rflag = 1;
132 break;
133 case 'u':
134 uflag = 1;
135 break;
136 case '?':
137 default:
138 usage();
139 }
140 argc -= optind;
141 argv += optind;
142
143 if (iswhoami && argc > 0)
144 usage();
145
146 switch(Aflag + Gflag + Mflag + Pflag + gflag + pflag + uflag) {
147 case 1:
148 break;
149 case 0:
150 if (!nflag && !rflag)
151 break;
152 /* FALLTHROUGH */
153 default:
154 usage();
155 }
156
157 pw = *argv ? who(*argv) : NULL;
158
159 if (Mflag && pw != NULL)
160 usage();
161
162 #ifdef USE_BSM_AUDIT
163 if (Aflag) {
164 auditid();
165 exit(0);
166 }
167 #endif
168
169 if (cflag) {
170 error = getloginclass(loginclass, sizeof(loginclass));
171 if (error != 0)
172 err(1, "loginclass");
173 (void)printf("%s\n", loginclass);
174 exit(0);
175 }
176
177 if (gflag) {
178 id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
179 if (nflag && (gr = getgrgid(id)))
180 (void)printf("%s\n", gr->gr_name);
181 else
182 (void)printf("%u\n", id);
183 exit(0);
184 }
185
186 if (uflag) {
187 id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
188 if (nflag && (pw = getpwuid(id)))
189 (void)printf("%s\n", pw->pw_name);
190 else
191 (void)printf("%u\n", id);
192 exit(0);
193 }
194
195 if (Gflag) {
196 group(pw, nflag);
197 exit(0);
198 }
199
200 if (Mflag) {
201 maclabel();
202 exit(0);
203 }
204
205 if (Pflag) {
206 pline(pw);
207 exit(0);
208 }
209
210 if (pflag) {
211 pretty(pw);
212 exit(0);
213 }
214
215 if (pw) {
216 id_print(pw, 1, 0, 0);
217 }
218 else {
219 id = getuid();
220 pw = getpwuid(id);
221 id_print(pw, 0, 1, 1);
222 }
223 exit(0);
224 }
225
226 static void
pretty(struct passwd * pw)227 pretty(struct passwd *pw)
228 {
229 struct group *gr;
230 u_int eid, rid;
231 char *login;
232
233 if (pw) {
234 (void)printf("uid\t%s\n", pw->pw_name);
235 (void)printf("groups\t");
236 group(pw, 1);
237 } else {
238 if ((login = getlogin()) == NULL)
239 err(1, "getlogin");
240
241 pw = getpwuid(rid = getuid());
242 if (pw == NULL || strcmp(login, pw->pw_name))
243 (void)printf("login\t%s\n", login);
244 if (pw)
245 (void)printf("uid\t%s\n", pw->pw_name);
246 else
247 (void)printf("uid\t%u\n", rid);
248
249 if ((eid = geteuid()) != rid) {
250 if ((pw = getpwuid(eid)))
251 (void)printf("euid\t%s\n", pw->pw_name);
252 else
253 (void)printf("euid\t%u\n", eid);
254 }
255 if ((rid = getgid()) != (eid = getegid())) {
256 if ((gr = getgrgid(rid)))
257 (void)printf("rgid\t%s\n", gr->gr_name);
258 else
259 (void)printf("rgid\t%u\n", rid);
260 }
261 (void)printf("groups\t");
262 group(NULL, 1);
263 }
264 }
265
266 static void
id_print(struct passwd * pw,int use_ggl,int p_euid,int p_egid)267 id_print(struct passwd *pw, int use_ggl, int p_euid, int p_egid)
268 {
269 struct group *gr;
270 gid_t gid, egid, lastgid;
271 uid_t uid, euid;
272 int cnt, ngroups;
273 long ngroups_max;
274 gid_t *groups;
275 const char *fmt;
276
277 if (pw != NULL) {
278 uid = pw->pw_uid;
279 gid = pw->pw_gid;
280 }
281 else {
282 uid = getuid();
283 gid = getgid();
284 }
285
286 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;
287 if ((groups = malloc(sizeof(gid_t) * ngroups_max)) == NULL)
288 err(1, "malloc");
289
290 if (use_ggl && pw != NULL) {
291 ngroups = ngroups_max;
292 getgrouplist(pw->pw_name, gid, groups, &ngroups);
293 }
294 else {
295 ngroups = getgroups(ngroups_max, groups);
296 }
297
298 if (pw != NULL)
299 printf("uid=%u(%s)", uid, pw->pw_name);
300 else
301 printf("uid=%u", getuid());
302 printf(" gid=%u", gid);
303 if ((gr = getgrgid(gid)))
304 (void)printf("(%s)", gr->gr_name);
305 if (p_euid && (euid = geteuid()) != uid) {
306 (void)printf(" euid=%u", euid);
307 if ((pw = getpwuid(euid)))
308 (void)printf("(%s)", pw->pw_name);
309 }
310 if (p_egid && (egid = getegid()) != gid) {
311 (void)printf(" egid=%u", egid);
312 if ((gr = getgrgid(egid)))
313 (void)printf("(%s)", gr->gr_name);
314 }
315 fmt = " groups=%u";
316 for (lastgid = -1, cnt = 0; cnt < ngroups; ++cnt) {
317 if (lastgid == (gid = groups[cnt]))
318 continue;
319 printf(fmt, gid);
320 fmt = ",%u";
321 if ((gr = getgrgid(gid)))
322 printf("(%s)", gr->gr_name);
323 lastgid = gid;
324 }
325 printf("\n");
326 free(groups);
327 }
328
329 #ifdef USE_BSM_AUDIT
330 static void
auditid(void)331 auditid(void)
332 {
333 auditinfo_t auditinfo;
334 auditinfo_addr_t ainfo_addr;
335 int ret, extended;
336
337 extended = 0;
338 ret = getaudit(&auditinfo);
339 if (ret < 0 && errno == E2BIG) {
340 if (getaudit_addr(&ainfo_addr, sizeof(ainfo_addr)) < 0)
341 err(1, "getaudit_addr");
342 extended = 1;
343 } else if (ret < 0)
344 err(1, "getaudit");
345 if (extended != 0) {
346 (void) printf("auid=%d\n"
347 "mask.success=0x%08x\n"
348 "mask.failure=0x%08x\n"
349 "asid=%d\n"
350 "termid_addr.port=0x%08jx\n"
351 "termid_addr.addr[0]=0x%08x\n"
352 "termid_addr.addr[1]=0x%08x\n"
353 "termid_addr.addr[2]=0x%08x\n"
354 "termid_addr.addr[3]=0x%08x\n",
355 ainfo_addr.ai_auid, ainfo_addr.ai_mask.am_success,
356 ainfo_addr.ai_mask.am_failure, ainfo_addr.ai_asid,
357 (uintmax_t)ainfo_addr.ai_termid.at_port,
358 ainfo_addr.ai_termid.at_addr[0],
359 ainfo_addr.ai_termid.at_addr[1],
360 ainfo_addr.ai_termid.at_addr[2],
361 ainfo_addr.ai_termid.at_addr[3]);
362 } else {
363 (void) printf("auid=%d\n"
364 "mask.success=0x%08x\n"
365 "mask.failure=0x%08x\n"
366 "asid=%d\n"
367 "termid.port=0x%08jx\n"
368 "termid.machine=0x%08x\n",
369 auditinfo.ai_auid, auditinfo.ai_mask.am_success,
370 auditinfo.ai_mask.am_failure,
371 auditinfo.ai_asid, (uintmax_t)auditinfo.ai_termid.port,
372 auditinfo.ai_termid.machine);
373 }
374 }
375 #endif
376
377 static void
group(struct passwd * pw,int nflag)378 group(struct passwd *pw, int nflag)
379 {
380 struct group *gr;
381 int cnt, id, lastid, ngroups;
382 long ngroups_max;
383 gid_t *groups;
384 const char *fmt;
385
386 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;
387 if ((groups = malloc(sizeof(gid_t) * (ngroups_max))) == NULL)
388 err(1, "malloc");
389
390 if (pw) {
391 ngroups = ngroups_max;
392 (void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
393 } else {
394 ngroups = getgroups(ngroups_max, groups);
395 }
396 fmt = nflag ? "%s" : "%u";
397 for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
398 if (lastid == (id = groups[cnt]))
399 continue;
400 if (nflag) {
401 if ((gr = getgrgid(id)))
402 (void)printf(fmt, gr->gr_name);
403 else
404 (void)printf(*fmt == ' ' ? " %u" : "%u",
405 id);
406 fmt = " %s";
407 } else {
408 (void)printf(fmt, id);
409 fmt = " %u";
410 }
411 lastid = id;
412 }
413 (void)printf("\n");
414 free(groups);
415 }
416
417 static void
maclabel(void)418 maclabel(void)
419 {
420 char *string;
421 mac_t label;
422 int error;
423
424 error = mac_prepare_process_label(&label);
425 if (error == -1)
426 errx(1, "mac_prepare_type: %s", strerror(errno));
427
428 error = mac_get_proc(label);
429 if (error == -1)
430 errx(1, "mac_get_proc: %s", strerror(errno));
431
432 error = mac_to_text(label, &string);
433 if (error == -1)
434 errx(1, "mac_to_text: %s", strerror(errno));
435
436 (void)printf("%s\n", string);
437 mac_free(label);
438 free(string);
439 }
440
441 static struct passwd *
who(char * u)442 who(char *u)
443 {
444 struct passwd *pw;
445 long id;
446 char *ep;
447
448 /*
449 * Translate user argument into a pw pointer. First, try to
450 * get it as specified. If that fails, try it as a number.
451 */
452 if ((pw = getpwnam(u)))
453 return(pw);
454 id = strtol(u, &ep, 10);
455 if (*u && !*ep && (pw = getpwuid(id)))
456 return(pw);
457 errx(1, "%s: no such user", u);
458 /* NOTREACHED */
459 }
460
461 static void
pline(struct passwd * pw)462 pline(struct passwd *pw)
463 {
464
465 if (!pw) {
466 if ((pw = getpwuid(getuid())) == NULL)
467 err(1, "getpwuid");
468 }
469
470 (void)printf("%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name,
471 pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
472 (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos,
473 pw->pw_dir, pw->pw_shell);
474 }
475
476
477 static void
usage(void)478 usage(void)
479 {
480
481 if (isgroups)
482 (void)fprintf(stderr, "usage: groups [user]\n");
483 else if (iswhoami)
484 (void)fprintf(stderr, "usage: whoami\n");
485 else
486 (void)fprintf(stderr, "%s\n%s%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
487 "usage: id [user]",
488 #ifdef USE_BSM_AUDIT
489 " id -A\n",
490 #else
491 "",
492 #endif
493 " id -G [-n] [user]",
494 " id -M",
495 " id -P [user]",
496 " id -c",
497 " id -g [-nr] [user]",
498 " id -p [user]",
499 " id -u [-nr] [user]");
500 exit(1);
501 }
502