Annotation of src/usr.bin/finger/finger.c, Revision 1.16
1.16 ! tedu 1: /* $OpenBSD: finger.c,v 1.15 2003/10/17 10:56:09 jmc 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.
1.13 millert 18: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: */
34:
35: /*
1.7 kstailey 36: * Luke Mewburn <lukem@netbsd.org> added the following on 961121:
37: * - mail status ("No Mail", "Mail read:...", or "New Mail ...,
38: * Unread since ...".)
39: * - 4 digit phone extensions (3210 is printed as x3210.)
40: * - host/office toggling in short format with -h & -o.
41: * - short day names (`Tue' printed instead of `Jun 21' if the
42: * login time is < 6 days.
1.1 deraadt 43: */
44:
45: #ifndef lint
1.16 ! tedu 46: static const char copyright[] =
1.1 deraadt 47: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
48: All rights reserved.\n";
49: #endif /* not lint */
50:
51: #ifndef lint
52: /*static char sccsid[] = "from: @(#)finger.c 5.22 (Berkeley) 6/29/90";*/
1.16 ! tedu 53: static const char rcsid[] = "$OpenBSD: finger.c,v 1.15 2003/10/17 10:56:09 jmc Exp $";
1.1 deraadt 54: #endif /* not lint */
55:
56: /*
57: * Finger prints out information about users. It is not portable since
58: * certain fields (e.g. the full user name, office, and phone numbers) are
59: * extracted from the gecos field of the passwd file which other UNIXes
60: * may not have or may use for other things.
61: *
62: * There are currently two output formats; the short format is one line
63: * per user and displays login name, tty, login time, real name, idle time,
1.7 kstailey 64: * and either remote host information (default) or office location/phone
65: * number, depending on if -h or -o is used respectively.
66: * The long format gives the same information (in a more legible format) as
67: * well as home directory, shell, mail info, and .plan/.project files.
1.1 deraadt 68: */
69:
70: #include <sys/param.h>
71: #include <sys/file.h>
1.9 downsj 72: #include <sys/stat.h>
1.1 deraadt 73: #include <stdio.h>
74: #include <stdlib.h>
1.7 kstailey 75: #include <string.h>
76: #include <time.h>
1.11 deraadt 77: #include <unistd.h>
1.8 mickey 78: #include <err.h>
1.1 deraadt 79: #include "finger.h"
1.7 kstailey 80: #include "extern.h"
1.1 deraadt 81:
82: time_t now;
1.7 kstailey 83: int entries, lflag, sflag, mflag, oflag, pplan, Mflag;
1.1 deraadt 84: char tbuf[1024];
1.16 ! tedu 85: PERSON *htab[HSIZE];
! 86: PERSON *phead, *ptail;
1.1 deraadt 87:
1.3 deraadt 88: int
1.14 deraadt 89: main(int argc, char *argv[])
1.1 deraadt 90: {
91: extern int optind;
1.8 mickey 92: extern char *__progname;
1.1 deraadt 93: int ch;
1.10 aaron 94: char domain[MAXHOSTNAMELEN];
1.9 downsj 95: struct stat sb;
1.1 deraadt 96:
1.7 kstailey 97: oflag = 1; /* default to old "office" behavior */
98:
99: while ((ch = getopt(argc, argv, "lmMpsho")) != -1)
1.1 deraadt 100: switch(ch) {
101: case 'l':
102: lflag = 1; /* long format */
103: break;
104: case 'm':
105: mflag = 1; /* force exact match of names */
106: break;
1.4 downsj 107: case 'M':
108: Mflag = 1; /* allow name matching */
109: break;
1.1 deraadt 110: case 'p':
111: pplan = 1; /* don't show .plan/.project */
112: break;
113: case 's':
114: sflag = 1; /* short format */
115: break;
1.7 kstailey 116: case 'h':
117: oflag = 0; /* remote host info */
118: break;
119: case 'o':
120: oflag = 1; /* office info */
121: break;
1.1 deraadt 122: case '?':
123: default:
124: (void)fprintf(stderr,
1.15 jmc 125: "usage: %s [-hlMmops] [login ...]\n", __progname);
1.1 deraadt 126: exit(1);
127: }
128: argc -= optind;
129: argv += optind;
130:
1.9 downsj 131: /* If a domainname is set, increment mflag. */
1.11 deraadt 132: if ((getdomainname(domain, sizeof(domain)) == 0) && domain[0])
1.4 downsj 133: mflag++;
1.9 downsj 134: /* If _PATH_MP_DB is larger than 1MB, increment mflag. */
135: if (stat(_PATH_MP_DB, &sb) == 0) {
136: if (sb.st_size > 1048576)
137: mflag++;
138: }
1.4 downsj 139:
1.1 deraadt 140: (void)time(&now);
141: setpassent(1);
142: if (!*argv) {
143: /*
144: * Assign explicit "small" format if no names given and -l
145: * not selected. Force the -s BEFORE we get names so proper
146: * screening will be done.
147: */
148: if (!lflag)
149: sflag = 1; /* if -l not explicit, force -s */
150: loginlist();
151: if (entries == 0)
152: (void)printf("No one logged on.\n");
153: } else {
154: userlist(argc, argv);
155: /*
156: * Assign explicit "large" format if names given and -s not
157: * explicitly stated. Force the -l AFTER we get names so any
158: * remote finger attempts specified won't be mishandled.
159: */
160: if (!sflag)
161: lflag = 1; /* if -s not explicit, force -l */
162: }
163: if (entries != 0) {
164: if (lflag)
165: lflag_print();
166: else
167: sflag_print();
168: }
169: exit(0);
170: }
171:
1.7 kstailey 172: void
1.14 deraadt 173: loginlist(void)
1.1 deraadt 174: {
1.7 kstailey 175: PERSON *pn;
1.1 deraadt 176: struct passwd *pw;
177: struct utmp user;
178: char name[UT_NAMESIZE + 1];
179:
1.8 mickey 180: if (!freopen(_PATH_UTMP, "r", stdin))
181: err(2, _PATH_UTMP);
1.7 kstailey 182: name[UT_NAMESIZE] = '\0';
1.1 deraadt 183: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
184: if (!user.ut_name[0])
185: continue;
186: if ((pn = find_person(user.ut_name)) == NULL) {
187: bcopy(user.ut_name, name, UT_NAMESIZE);
188: if ((pw = getpwnam(name)) == NULL)
189: continue;
190: pn = enter_person(pw);
191: }
192: enter_where(&user, pn);
193: }
194: for (pn = phead; lflag && pn != NULL; pn = pn->next)
195: enter_lastlog(pn);
196: }
197:
1.3 deraadt 198: void
1.14 deraadt 199: userlist(int argc, char **argv)
1.1 deraadt 200: {
1.12 mpech 201: int i;
202: PERSON *pn;
1.1 deraadt 203: PERSON *nethead, **nettail;
204: struct utmp user;
205: struct passwd *pw;
206: int dolocal, *used;
207:
1.8 mickey 208: if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int))))
209: err(2, "malloc");
1.1 deraadt 210:
211: /* pull out all network requests */
212: for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) {
1.6 millert 213: if (!strchr(argv[i], '@')) {
1.1 deraadt 214: dolocal = 1;
215: continue;
216: }
217: pn = palloc();
218: *nettail = pn;
219: nettail = &pn->next;
220: pn->name = argv[i];
221: used[i] = -1;
222: }
223: *nettail = NULL;
224:
225: if (!dolocal)
226: goto net;
227:
228: /*
229: * traverse the list of possible login names and check the login name
230: * and real name against the name specified by the user.
231: */
1.4 downsj 232: if ((mflag - Mflag) > 0) {
1.1 deraadt 233: for (i = 0; i < argc; i++)
234: if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
235: enter_person(pw);
236: used[i] = 1;
237: }
1.7 kstailey 238: } else while ((pw = getpwent()) != NULL)
1.1 deraadt 239: for (i = 0; i < argc; i++)
240: if (used[i] >= 0 &&
241: (!strcasecmp(pw->pw_name, argv[i]) ||
242: match(pw, argv[i]))) {
243: enter_person(pw);
244: used[i] = 1;
245: }
246:
247: /* list errors */
248: for (i = 0; i < argc; i++)
249: if (!used[i])
1.8 mickey 250: warnx("%s: no such user.", argv[i]);
1.1 deraadt 251:
252: /* handle network requests */
253: net: for (pn = nethead; pn; pn = pn->next) {
254: netfinger(pn->name);
255: if (pn->next || entries)
256: putchar('\n');
257: }
258:
259: if (entries == 0)
260: return;
261:
262: /*
263: * Scan thru the list of users currently logged in, saving
264: * appropriate data whenever a match occurs.
265: */
1.8 mickey 266: if (!freopen(_PATH_UTMP, "r", stdin))
267: err(1, _PATH_UTMP);
1.1 deraadt 268: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
269: if (!user.ut_name[0])
270: continue;
271: if ((pn = find_person(user.ut_name)) == NULL)
272: continue;
273: enter_where(&user, pn);
274: }
275: for (pn = phead; pn != NULL; pn = pn->next)
276: enter_lastlog(pn);
277: }
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