Annotation of src/usr.bin/finger/finger.c, Revision 1.12
1.12 ! mpech 1: /* $OpenBSD: finger.c,v 1.11 2001/07/04 06:30:44 deraadt Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1989 The Regents of the University of California.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: /*
1.7 kstailey 40: * Luke Mewburn <lukem@netbsd.org> added the following on 961121:
41: * - mail status ("No Mail", "Mail read:...", or "New Mail ...,
42: * Unread since ...".)
43: * - 4 digit phone extensions (3210 is printed as x3210.)
44: * - host/office toggling in short format with -h & -o.
45: * - short day names (`Tue' printed instead of `Jun 21' if the
46: * login time is < 6 days.
1.1 deraadt 47: */
48:
49: #ifndef lint
50: char copyright[] =
51: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
52: All rights reserved.\n";
53: #endif /* not lint */
54:
55: #ifndef lint
56: /*static char sccsid[] = "from: @(#)finger.c 5.22 (Berkeley) 6/29/90";*/
1.12 ! mpech 57: static char rcsid[] = "$OpenBSD: finger.c,v 1.11 2001/07/04 06:30:44 deraadt Exp $";
1.1 deraadt 58: #endif /* not lint */
59:
60: /*
61: * Finger prints out information about users. It is not portable since
62: * certain fields (e.g. the full user name, office, and phone numbers) are
63: * extracted from the gecos field of the passwd file which other UNIXes
64: * may not have or may use for other things.
65: *
66: * There are currently two output formats; the short format is one line
67: * per user and displays login name, tty, login time, real name, idle time,
1.7 kstailey 68: * and either remote host information (default) or office location/phone
69: * number, depending on if -h or -o is used respectively.
70: * The long format gives the same information (in a more legible format) as
71: * well as home directory, shell, mail info, and .plan/.project files.
1.1 deraadt 72: */
73:
74: #include <sys/param.h>
75: #include <sys/file.h>
1.9 downsj 76: #include <sys/stat.h>
1.1 deraadt 77: #include <stdio.h>
78: #include <stdlib.h>
1.7 kstailey 79: #include <string.h>
80: #include <time.h>
1.11 deraadt 81: #include <unistd.h>
1.8 mickey 82: #include <err.h>
1.1 deraadt 83: #include "finger.h"
1.7 kstailey 84: #include "extern.h"
1.1 deraadt 85:
86: time_t now;
1.7 kstailey 87: int entries, lflag, sflag, mflag, oflag, pplan, Mflag;
1.1 deraadt 88: char tbuf[1024];
89:
1.3 deraadt 90: int
1.1 deraadt 91: main(argc, argv)
92: int argc;
93: char **argv;
94: {
95: extern int optind;
1.8 mickey 96: extern char *__progname;
1.1 deraadt 97: int ch;
1.10 aaron 98: char domain[MAXHOSTNAMELEN];
1.9 downsj 99: struct stat sb;
1.1 deraadt 100:
1.7 kstailey 101: oflag = 1; /* default to old "office" behavior */
102:
103: while ((ch = getopt(argc, argv, "lmMpsho")) != -1)
1.1 deraadt 104: switch(ch) {
105: case 'l':
106: lflag = 1; /* long format */
107: break;
108: case 'm':
109: mflag = 1; /* force exact match of names */
110: break;
1.4 downsj 111: case 'M':
112: Mflag = 1; /* allow name matching */
113: break;
1.1 deraadt 114: case 'p':
115: pplan = 1; /* don't show .plan/.project */
116: break;
117: case 's':
118: sflag = 1; /* short format */
119: break;
1.7 kstailey 120: case 'h':
121: oflag = 0; /* remote host info */
122: break;
123: case 'o':
124: oflag = 1; /* office info */
125: break;
1.1 deraadt 126: case '?':
127: default:
128: (void)fprintf(stderr,
1.8 mickey 129: "usage: %s [-lmMpsho] [login ...]\n", __progname);
1.1 deraadt 130: exit(1);
131: }
132: argc -= optind;
133: argv += optind;
134:
1.9 downsj 135: /* If a domainname is set, increment mflag. */
1.11 deraadt 136: if ((getdomainname(domain, sizeof(domain)) == 0) && domain[0])
1.4 downsj 137: mflag++;
1.9 downsj 138: /* If _PATH_MP_DB is larger than 1MB, increment mflag. */
139: if (stat(_PATH_MP_DB, &sb) == 0) {
140: if (sb.st_size > 1048576)
141: mflag++;
142: }
1.4 downsj 143:
1.1 deraadt 144: (void)time(&now);
145: setpassent(1);
146: if (!*argv) {
147: /*
148: * Assign explicit "small" format if no names given and -l
149: * not selected. Force the -s BEFORE we get names so proper
150: * screening will be done.
151: */
152: if (!lflag)
153: sflag = 1; /* if -l not explicit, force -s */
154: loginlist();
155: if (entries == 0)
156: (void)printf("No one logged on.\n");
157: } else {
158: userlist(argc, argv);
159: /*
160: * Assign explicit "large" format if names given and -s not
161: * explicitly stated. Force the -l AFTER we get names so any
162: * remote finger attempts specified won't be mishandled.
163: */
164: if (!sflag)
165: lflag = 1; /* if -s not explicit, force -l */
166: }
167: if (entries != 0) {
168: if (lflag)
169: lflag_print();
170: else
171: sflag_print();
172: }
173: exit(0);
174: }
175:
1.7 kstailey 176: void
1.1 deraadt 177: loginlist()
178: {
1.7 kstailey 179: PERSON *pn;
1.1 deraadt 180: struct passwd *pw;
181: struct utmp user;
182: char name[UT_NAMESIZE + 1];
183:
1.8 mickey 184: if (!freopen(_PATH_UTMP, "r", stdin))
185: err(2, _PATH_UTMP);
1.7 kstailey 186: name[UT_NAMESIZE] = '\0';
1.1 deraadt 187: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
188: if (!user.ut_name[0])
189: continue;
190: if ((pn = find_person(user.ut_name)) == NULL) {
191: bcopy(user.ut_name, name, UT_NAMESIZE);
192: if ((pw = getpwnam(name)) == NULL)
193: continue;
194: pn = enter_person(pw);
195: }
196: enter_where(&user, pn);
197: }
198: for (pn = phead; lflag && pn != NULL; pn = pn->next)
199: enter_lastlog(pn);
200: }
201:
1.3 deraadt 202: void
1.1 deraadt 203: userlist(argc, argv)
1.7 kstailey 204: int argc;
205: char **argv;
1.1 deraadt 206: {
1.12 ! mpech 207: int i;
! 208: PERSON *pn;
1.1 deraadt 209: PERSON *nethead, **nettail;
210: struct utmp user;
211: struct passwd *pw;
212: int dolocal, *used;
213:
1.8 mickey 214: if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int))))
215: err(2, "malloc");
1.1 deraadt 216:
217: /* pull out all network requests */
218: for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) {
1.6 millert 219: if (!strchr(argv[i], '@')) {
1.1 deraadt 220: dolocal = 1;
221: continue;
222: }
223: pn = palloc();
224: *nettail = pn;
225: nettail = &pn->next;
226: pn->name = argv[i];
227: used[i] = -1;
228: }
229: *nettail = NULL;
230:
231: if (!dolocal)
232: goto net;
233:
234: /*
235: * traverse the list of possible login names and check the login name
236: * and real name against the name specified by the user.
237: */
1.4 downsj 238: if ((mflag - Mflag) > 0) {
1.1 deraadt 239: for (i = 0; i < argc; i++)
240: if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
241: enter_person(pw);
242: used[i] = 1;
243: }
1.7 kstailey 244: } else while ((pw = getpwent()) != NULL)
1.1 deraadt 245: for (i = 0; i < argc; i++)
246: if (used[i] >= 0 &&
247: (!strcasecmp(pw->pw_name, argv[i]) ||
248: match(pw, argv[i]))) {
249: enter_person(pw);
250: used[i] = 1;
251: }
252:
253: /* list errors */
254: for (i = 0; i < argc; i++)
255: if (!used[i])
1.8 mickey 256: warnx("%s: no such user.", argv[i]);
1.1 deraadt 257:
258: /* handle network requests */
259: net: for (pn = nethead; pn; pn = pn->next) {
260: netfinger(pn->name);
261: if (pn->next || entries)
262: putchar('\n');
263: }
264:
265: if (entries == 0)
266: return;
267:
268: /*
269: * Scan thru the list of users currently logged in, saving
270: * appropriate data whenever a match occurs.
271: */
1.8 mickey 272: if (!freopen(_PATH_UTMP, "r", stdin))
273: err(1, _PATH_UTMP);
1.1 deraadt 274: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
275: if (!user.ut_name[0])
276: continue;
277: if ((pn = find_person(user.ut_name)) == NULL)
278: continue;
279: enter_where(&user, pn);
280: }
281: for (pn = phead; pn != NULL; pn = pn->next)
282: enter_lastlog(pn);
283: }
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