Annotation of src/usr.bin/finger/finger.c, Revision 1.1.1.1
1.1 deraadt 1: /*
2: * Copyright (c) 1989 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: /*
38: * Mail status reporting added 931007 by Luke Mewburn, <zak@rmit.edu.au>.
39: */
40:
41: #ifndef lint
42: char copyright[] =
43: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
44: All rights reserved.\n";
45: #endif /* not lint */
46:
47: #ifndef lint
48: /*static char sccsid[] = "from: @(#)finger.c 5.22 (Berkeley) 6/29/90";*/
49: static char rcsid[] = "$Id: finger.c,v 1.4 1994/12/24 16:33:46 cgd Exp $";
50: #endif /* not lint */
51:
52: /*
53: * Finger prints out information about users. It is not portable since
54: * certain fields (e.g. the full user name, office, and phone numbers) are
55: * extracted from the gecos field of the passwd file which other UNIXes
56: * may not have or may use for other things.
57: *
58: * There are currently two output formats; the short format is one line
59: * per user and displays login name, tty, login time, real name, idle time,
60: * and office location/phone number. The long format gives the same
61: * information (in a more legible format) as well as home directory, shell,
62: * mail info, and .plan/.project files.
63: */
64:
65: #include <sys/param.h>
66: #include <sys/file.h>
67: #include <stdio.h>
68: #include <stdlib.h>
69: #include "finger.h"
70:
71: time_t now;
72: int lflag, sflag, mflag, pplan;
73: char tbuf[1024];
74:
75: main(argc, argv)
76: int argc;
77: char **argv;
78: {
79: extern int optind;
80: int ch;
81: time_t time();
82:
83: while ((ch = getopt(argc, argv, "lmps")) != EOF)
84: switch(ch) {
85: case 'l':
86: lflag = 1; /* long format */
87: break;
88: case 'm':
89: mflag = 1; /* force exact match of names */
90: break;
91: case 'p':
92: pplan = 1; /* don't show .plan/.project */
93: break;
94: case 's':
95: sflag = 1; /* short format */
96: break;
97: case '?':
98: default:
99: (void)fprintf(stderr,
100: "usage: finger [-lmps] [login ...]\n");
101: exit(1);
102: }
103: argc -= optind;
104: argv += optind;
105:
106: (void)time(&now);
107: setpassent(1);
108: if (!*argv) {
109: /*
110: * Assign explicit "small" format if no names given and -l
111: * not selected. Force the -s BEFORE we get names so proper
112: * screening will be done.
113: */
114: if (!lflag)
115: sflag = 1; /* if -l not explicit, force -s */
116: loginlist();
117: if (entries == 0)
118: (void)printf("No one logged on.\n");
119: } else {
120: userlist(argc, argv);
121: /*
122: * Assign explicit "large" format if names given and -s not
123: * explicitly stated. Force the -l AFTER we get names so any
124: * remote finger attempts specified won't be mishandled.
125: */
126: if (!sflag)
127: lflag = 1; /* if -s not explicit, force -l */
128: }
129: if (entries != 0) {
130: if (lflag)
131: lflag_print();
132: else
133: sflag_print();
134: }
135: exit(0);
136: }
137:
138: loginlist()
139: {
140: register PERSON *pn;
141: struct passwd *pw;
142: struct utmp user;
143: char name[UT_NAMESIZE + 1];
144:
145: if (!freopen(_PATH_UTMP, "r", stdin)) {
146: (void)fprintf(stderr, "finger: can't read %s.\n", _PATH_UTMP);
147: exit(2);
148: }
149: name[UT_NAMESIZE] = NULL;
150: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
151: if (!user.ut_name[0])
152: continue;
153: if ((pn = find_person(user.ut_name)) == NULL) {
154: bcopy(user.ut_name, name, UT_NAMESIZE);
155: if ((pw = getpwnam(name)) == NULL)
156: continue;
157: pn = enter_person(pw);
158: }
159: enter_where(&user, pn);
160: }
161: for (pn = phead; lflag && pn != NULL; pn = pn->next)
162: enter_lastlog(pn);
163: }
164:
165: userlist(argc, argv)
166: register argc;
167: register char **argv;
168: {
169: register i;
170: register PERSON *pn;
171: PERSON *nethead, **nettail;
172: struct utmp user;
173: struct passwd *pw;
174: int dolocal, *used;
175: char *index();
176:
177: if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int)))) {
178: (void)fprintf(stderr, "finger: out of space.\n");
179: exit(1);
180: }
181:
182: /* pull out all network requests */
183: for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) {
184: if (!index(argv[i], '@')) {
185: dolocal = 1;
186: continue;
187: }
188: pn = palloc();
189: *nettail = pn;
190: nettail = &pn->next;
191: pn->name = argv[i];
192: used[i] = -1;
193: }
194: *nettail = NULL;
195:
196: if (!dolocal)
197: goto net;
198:
199: /*
200: * traverse the list of possible login names and check the login name
201: * and real name against the name specified by the user.
202: */
203: if (mflag) {
204: for (i = 0; i < argc; i++)
205: if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
206: enter_person(pw);
207: used[i] = 1;
208: }
209: } else while (pw = getpwent())
210: for (i = 0; i < argc; i++)
211: if (used[i] >= 0 &&
212: (!strcasecmp(pw->pw_name, argv[i]) ||
213: match(pw, argv[i]))) {
214: enter_person(pw);
215: used[i] = 1;
216: }
217:
218: /* list errors */
219: for (i = 0; i < argc; i++)
220: if (!used[i])
221: (void)fprintf(stderr,
222: "finger: %s: no such user.\n", argv[i]);
223:
224: /* handle network requests */
225: net: for (pn = nethead; pn; pn = pn->next) {
226: netfinger(pn->name);
227: if (pn->next || entries)
228: putchar('\n');
229: }
230:
231: if (entries == 0)
232: return;
233:
234: /*
235: * Scan thru the list of users currently logged in, saving
236: * appropriate data whenever a match occurs.
237: */
238: if (!freopen(_PATH_UTMP, "r", stdin)) {
239: (void)fprintf( stderr, "finger: can't read %s.\n", _PATH_UTMP);
240: exit(1);
241: }
242: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
243: if (!user.ut_name[0])
244: continue;
245: if ((pn = find_person(user.ut_name)) == NULL)
246: continue;
247: enter_where(&user, pn);
248: }
249: for (pn = phead; pn != NULL; pn = pn->next)
250: enter_lastlog(pn);
251: }
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