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[FreeBSD/releng/7.2.git] / usr.bin / id / id.c
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *      This product includes software developed by the University of
16  *      California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33
34 #ifndef lint
35 static const char copyright[] =
36 "@(#) Copyright (c) 1991, 1993\n\
37         The Regents of the University of California.  All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 #if 0
42 static char sccsid[] = "@(#)id.c        8.2 (Berkeley) 2/16/94";
43 #endif
44 #endif /* not lint */
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
47
48 #include <sys/param.h>
49 #include <sys/mac.h>
50
51 #ifdef USE_BSM_AUDIT
52 #include <bsm/audit.h>
53 #endif
54
55 #include <err.h>
56 #include <errno.h>
57 #include <grp.h>
58 #include <pwd.h>
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <unistd.h>
63
64 void    id_print(struct passwd *, int, int, int);
65 void    pline(struct passwd *);
66 void    pretty(struct passwd *);
67 void    auditid(void);
68 void    group(struct passwd *, int);
69 void    maclabel(void);
70 void    usage(void);
71 struct passwd *who(char *);
72
73 int isgroups, iswhoami;
74
75 int
76 main(int argc, char *argv[])
77 {
78         struct group *gr;
79         struct passwd *pw;
80         int Gflag, Mflag, Pflag, ch, gflag, id, nflag, pflag, rflag, uflag;
81         int Aflag;
82         const char *myname;
83
84         Gflag = Mflag = Pflag = gflag = nflag = pflag = rflag = uflag = 0;
85         Aflag = 0;
86
87         myname = strrchr(argv[0], '/');
88         myname = (myname != NULL) ? myname + 1 : argv[0];
89         if (strcmp(myname, "groups") == 0) {
90                 isgroups = 1;
91                 Gflag = nflag = 1;
92         }
93         else if (strcmp(myname, "whoami") == 0) {
94                 iswhoami = 1;
95                 uflag = nflag = 1;
96         }
97
98         while ((ch = getopt(argc, argv,
99             (isgroups || iswhoami) ? "" : "APGMagnpru")) != -1)
100                 switch(ch) {
101 #ifdef USE_BSM_AUDIT
102                 case 'A':
103                         Aflag = 1;
104                         break;
105 #endif
106                 case 'G':
107                         Gflag = 1;
108                         break;
109                 case 'M':
110                         Mflag = 1;
111                         break;
112                 case 'P':
113                         Pflag = 1;
114                         break;
115                 case 'a':
116                         break;
117                 case 'g':
118                         gflag = 1;
119                         break;
120                 case 'n':
121                         nflag = 1;
122                         break;
123                 case 'p':
124                         pflag = 1;
125                         break;
126                 case 'r':
127                         rflag = 1;
128                         break;
129                 case 'u':
130                         uflag = 1;
131                         break;
132                 case '?':
133                 default:
134                         usage();
135                 }
136         argc -= optind;
137         argv += optind;
138
139         if (iswhoami && argc > 0)
140                 usage();
141
142         switch(Aflag + Gflag + Mflag + Pflag + gflag + pflag + uflag) {
143         case 1:
144                 break;
145         case 0:
146                 if (!nflag && !rflag)
147                         break;
148                 /* FALLTHROUGH */
149         default:
150                 usage();
151         }
152
153         pw = *argv ? who(*argv) : NULL;
154
155         if (Mflag && pw != NULL)
156                 usage();
157
158 #ifdef USE_BSM_AUDIT
159         if (Aflag) {
160                 auditid();
161                 exit(0);
162         }
163 #endif
164
165         if (gflag) {
166                 id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
167                 if (nflag && (gr = getgrgid(id)))
168                         (void)printf("%s\n", gr->gr_name);
169                 else
170                         (void)printf("%u\n", id);
171                 exit(0);
172         }
173
174         if (uflag) {
175                 id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
176                 if (nflag && (pw = getpwuid(id)))
177                         (void)printf("%s\n", pw->pw_name);
178                 else
179                         (void)printf("%u\n", id);
180                 exit(0);
181         }
182
183         if (Gflag) {
184                 group(pw, nflag);
185                 exit(0);
186         }
187
188         if (Mflag) {
189                 maclabel();
190                 exit(0);
191         }
192
193         if (Pflag) {
194                 pline(pw);
195                 exit(0);
196         }
197
198         if (pflag) {
199                 pretty(pw);
200                 exit(0);
201         }
202
203         if (pw) {
204                 id_print(pw, 1, 0, 0);
205         }
206         else {
207                 id = getuid();
208                 pw = getpwuid(id);
209                 id_print(pw, 0, 1, 1);
210         }
211         exit(0);
212 }
213
214 void
215 pretty(struct passwd *pw)
216 {
217         struct group *gr;
218         u_int eid, rid;
219         char *login;
220
221         if (pw) {
222                 (void)printf("uid\t%s\n", pw->pw_name);
223                 (void)printf("groups\t");
224                 group(pw, 1);
225         } else {
226                 if ((login = getlogin()) == NULL)
227                         err(1, "getlogin");
228
229                 pw = getpwuid(rid = getuid());
230                 if (pw == NULL || strcmp(login, pw->pw_name))
231                         (void)printf("login\t%s\n", login);
232                 if (pw)
233                         (void)printf("uid\t%s\n", pw->pw_name);
234                 else
235                         (void)printf("uid\t%u\n", rid);
236
237                 if ((eid = geteuid()) != rid) {
238                         if ((pw = getpwuid(eid)))
239                                 (void)printf("euid\t%s\n", pw->pw_name);
240                         else
241                                 (void)printf("euid\t%u\n", eid);
242                 }
243                 if ((rid = getgid()) != (eid = getegid())) {
244                         if ((gr = getgrgid(rid)))
245                                 (void)printf("rgid\t%s\n", gr->gr_name);
246                         else
247                                 (void)printf("rgid\t%u\n", rid);
248                 }
249                 (void)printf("groups\t");
250                 group(NULL, 1);
251         }
252 }
253
254 void
255 id_print(struct passwd *pw, int use_ggl, int p_euid, int p_egid)
256 {
257         struct group *gr;
258         gid_t gid, egid, lastgid;
259         uid_t uid, euid;
260         int cnt, ngroups;
261         gid_t groups[NGROUPS + 1];
262         const char *fmt;
263
264         if (pw != NULL) {
265                 uid = pw->pw_uid;
266                 gid = pw->pw_gid;
267         }
268         else {
269                 uid = getuid();
270                 gid = getgid();
271         }
272
273         if (use_ggl && pw != NULL) {
274                 ngroups = NGROUPS + 1;
275                 getgrouplist(pw->pw_name, gid, groups, &ngroups);
276         }
277         else {
278                 ngroups = getgroups(NGROUPS + 1, groups);
279         }
280
281         if (pw != NULL)
282                 printf("uid=%u(%s)", uid, pw->pw_name);
283         else 
284                 printf("uid=%u", getuid());
285         printf(" gid=%u", gid);
286         if ((gr = getgrgid(gid)))
287                 (void)printf("(%s)", gr->gr_name);
288         if (p_euid && (euid = geteuid()) != uid) {
289                 (void)printf(" euid=%u", euid);
290                 if ((pw = getpwuid(euid)))
291                         (void)printf("(%s)", pw->pw_name);
292         }
293         if (p_egid && (egid = getegid()) != gid) {
294                 (void)printf(" egid=%u", egid);
295                 if ((gr = getgrgid(egid)))
296                         (void)printf("(%s)", gr->gr_name);
297         }
298         fmt = " groups=%u";
299         for (lastgid = -1, cnt = 0; cnt < ngroups; ++cnt) {
300                 if (lastgid == (gid = groups[cnt]))
301                         continue;
302                 printf(fmt, gid);
303                 fmt = ",%u";
304                 if ((gr = getgrgid(gid)))
305                         printf("(%s)", gr->gr_name);
306                 lastgid = gid;
307         }
308         printf("\n");
309 }
310
311 #ifdef USE_BSM_AUDIT
312 void
313 auditid(void)
314 {
315         auditinfo_t auditinfo;
316         auditinfo_addr_t ainfo_addr;
317         int ret, extended;
318
319         extended = 0;
320         ret = getaudit(&auditinfo);
321         if (ret < 0 && errno == E2BIG) {
322                 if (getaudit_addr(&ainfo_addr, sizeof(ainfo_addr)) < 0)
323                         err(1, "getaudit_addr");
324                 extended = 1;
325         } else if (ret < 0)
326                 err(1, "getaudit");
327         if (extended != 0) {
328                 (void) printf("auid=%d\n"
329                     "mask.success=0x%08x\n"
330                     "mask.failure=0x%08x\n"
331                     "asid=%d\n"
332                     "termid_addr.port=0x%08x\n"
333                     "termid_addr.addr[0]=0x%08x\n"
334                     "termid_addr.addr[1]=0x%08x\n"
335                     "termid_addr.addr[2]=0x%08x\n"
336                     "termid_addr.addr[3]=0x%08x\n",
337                         ainfo_addr.ai_auid, ainfo_addr.ai_mask.am_success,
338                         ainfo_addr.ai_mask.am_failure, ainfo_addr.ai_asid,
339                         ainfo_addr.ai_termid.at_port,
340                         ainfo_addr.ai_termid.at_addr[0],
341                         ainfo_addr.ai_termid.at_addr[1],
342                         ainfo_addr.ai_termid.at_addr[2],
343                         ainfo_addr.ai_termid.at_addr[3]);
344         } else {
345                 (void) printf("auid=%d\n"
346                     "mask.success=0x%08x\n"
347                     "mask.failure=0x%08x\n"
348                     "asid=%d\n"
349                     "termid.port=0x%08x\n"
350                     "termid.machine=0x%08x\n",
351                         auditinfo.ai_auid, auditinfo.ai_mask.am_success,
352                         auditinfo.ai_mask.am_failure,
353                         auditinfo.ai_asid, auditinfo.ai_termid.port,
354                         auditinfo.ai_termid.machine);
355         }
356 }
357 #endif
358
359 void
360 group(struct passwd *pw, int nflag)
361 {
362         struct group *gr;
363         int cnt, id, lastid, ngroups;
364         gid_t groups[NGROUPS + 1];
365         const char *fmt;
366
367         if (pw) {
368                 ngroups = NGROUPS + 1;
369                 (void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
370         } else {
371                 groups[0] = getgid();
372                 ngroups = getgroups(NGROUPS, groups + 1) + 1;
373         }
374         fmt = nflag ? "%s" : "%u";
375         for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
376                 if (lastid == (id = groups[cnt]))
377                         continue;
378                 if (nflag) {
379                         if ((gr = getgrgid(id)))
380                                 (void)printf(fmt, gr->gr_name);
381                         else
382                                 (void)printf(*fmt == ' ' ? " %u" : "%u",
383                                     id);
384                         fmt = " %s";
385                 } else {
386                         (void)printf(fmt, id);
387                         fmt = " %u";
388                 }
389                 lastid = id;
390         }
391         (void)printf("\n");
392 }
393
394 void
395 maclabel(void)
396 {
397         char *string;
398         mac_t label;
399         int error;
400
401         error = mac_prepare_process_label(&label);
402         if (error == -1)
403                 errx(1, "mac_prepare_type: %s", strerror(errno));
404
405         error = mac_get_proc(label);
406         if (error == -1)
407                 errx(1, "mac_get_proc: %s", strerror(errno));
408
409         error = mac_to_text(label, &string);
410         if (error == -1)
411                 errx(1, "mac_to_text: %s", strerror(errno));
412
413         (void)printf("%s\n", string);
414         mac_free(label);
415         free(string);
416 }
417
418 struct passwd *
419 who(char *u)
420 {
421         struct passwd *pw;
422         long id;
423         char *ep;
424
425         /*
426          * Translate user argument into a pw pointer.  First, try to
427          * get it as specified.  If that fails, try it as a number.
428          */
429         if ((pw = getpwnam(u)))
430                 return(pw);
431         id = strtol(u, &ep, 10);
432         if (*u && !*ep && (pw = getpwuid(id)))
433                 return(pw);
434         errx(1, "%s: no such user", u);
435         /* NOTREACHED */
436 }
437
438 void
439 pline(struct passwd *pw)
440 {
441
442         if (!pw) {
443                 if ((pw = getpwuid(getuid())) == NULL)
444                         err(1, "getpwuid");
445         }
446
447         (void)printf("%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name,
448                         pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
449                         (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos,
450                         pw->pw_dir, pw->pw_shell);
451 }
452
453
454 void
455 usage(void)
456 {
457
458         if (isgroups)
459                 (void)fprintf(stderr, "usage: groups [user]\n");
460         else if (iswhoami)
461                 (void)fprintf(stderr, "usage: whoami\n");
462         else
463                 (void)fprintf(stderr, "%s\n%s%s\n%s\n%s\n%s\n%s\n%s\n",
464                     "usage: id [user]",
465 #ifdef USE_BSM_AUDIT
466                     "       id -A\n",
467 #else
468                     "",
469 #endif
470                     "       id -G [-n] [user]",
471                     "       id -M",
472                     "       id -P [user]",
473                     "       id -g [-nr] [user]",
474                     "       id -p [user]",
475                     "       id -u [-nr] [user]");
476         exit(1);
477 }