Annotation of src/usr.bin/finger/finger.c, Revision 1.7
1.7 ! kstailey 1: /* $OpenBSD: finger.c,v 1.6 1997/01/17 07:12:31 millert 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";*/
1.7 ! kstailey 57: static char rcsid[] = "$OpenBSD: finger.c,v 1.6 1997/01/17 07:12:31 millert 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>
76: #include <stdio.h>
77: #include <stdlib.h>
1.7 ! kstailey 78: #include <string.h>
! 79: #include <time.h>
1.1 deraadt 80: #include "finger.h"
1.7 ! kstailey 81: #include "extern.h"
1.1 deraadt 82:
83: time_t now;
1.7 ! kstailey 84: int entries, lflag, sflag, mflag, oflag, pplan, Mflag;
1.1 deraadt 85: char tbuf[1024];
86:
1.3 deraadt 87: int
1.1 deraadt 88: main(argc, argv)
89: int argc;
90: char **argv;
91: {
92: extern int optind;
93: int ch;
1.4 downsj 94: char domain[256];
1.1 deraadt 95:
1.7 ! kstailey 96: oflag = 1; /* default to old "office" behavior */
! 97:
! 98: while ((ch = getopt(argc, argv, "lmMpsho")) != -1)
1.1 deraadt 99: switch(ch) {
100: case 'l':
101: lflag = 1; /* long format */
102: break;
103: case 'm':
104: mflag = 1; /* force exact match of names */
105: break;
1.4 downsj 106: case 'M':
107: Mflag = 1; /* allow name matching */
108: break;
1.1 deraadt 109: case 'p':
110: pplan = 1; /* don't show .plan/.project */
111: break;
112: case 's':
113: sflag = 1; /* short format */
114: break;
1.7 ! kstailey 115: case 'h':
! 116: oflag = 0; /* remote host info */
! 117: break;
! 118: case 'o':
! 119: oflag = 1; /* office info */
! 120: break;
1.1 deraadt 121: case '?':
122: default:
123: (void)fprintf(stderr,
1.7 ! kstailey 124: "usage: finger [-lmMpsho] [login ...]\n");
1.1 deraadt 125: exit(1);
126: }
127: argc -= optind;
128: argv += optind;
129:
1.4 downsj 130: /* if a domainname is set, increment mflag. */
131: if ((getdomainname(&domain, sizeof(domain)) == 0) && domain[0])
132: mflag++;
133:
1.1 deraadt 134: (void)time(&now);
135: setpassent(1);
136: if (!*argv) {
137: /*
138: * Assign explicit "small" format if no names given and -l
139: * not selected. Force the -s BEFORE we get names so proper
140: * screening will be done.
141: */
142: if (!lflag)
143: sflag = 1; /* if -l not explicit, force -s */
144: loginlist();
145: if (entries == 0)
146: (void)printf("No one logged on.\n");
147: } else {
148: userlist(argc, argv);
149: /*
150: * Assign explicit "large" format if names given and -s not
151: * explicitly stated. Force the -l AFTER we get names so any
152: * remote finger attempts specified won't be mishandled.
153: */
154: if (!sflag)
155: lflag = 1; /* if -s not explicit, force -l */
156: }
157: if (entries != 0) {
158: if (lflag)
159: lflag_print();
160: else
161: sflag_print();
162: }
163: exit(0);
164: }
165:
1.7 ! kstailey 166: void
1.1 deraadt 167: loginlist()
168: {
1.7 ! kstailey 169: PERSON *pn;
1.1 deraadt 170: struct passwd *pw;
171: struct utmp user;
172: char name[UT_NAMESIZE + 1];
173:
174: if (!freopen(_PATH_UTMP, "r", stdin)) {
175: (void)fprintf(stderr, "finger: can't read %s.\n", _PATH_UTMP);
176: exit(2);
177: }
1.7 ! kstailey 178: name[UT_NAMESIZE] = '\0';
1.1 deraadt 179: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
180: if (!user.ut_name[0])
181: continue;
182: if ((pn = find_person(user.ut_name)) == NULL) {
183: bcopy(user.ut_name, name, UT_NAMESIZE);
184: if ((pw = getpwnam(name)) == NULL)
185: continue;
186: pn = enter_person(pw);
187: }
188: enter_where(&user, pn);
189: }
190: for (pn = phead; lflag && pn != NULL; pn = pn->next)
191: enter_lastlog(pn);
192: }
193:
1.3 deraadt 194: void
1.1 deraadt 195: userlist(argc, argv)
1.7 ! kstailey 196: int argc;
! 197: char **argv;
1.1 deraadt 198: {
1.7 ! kstailey 199: register int i;
1.1 deraadt 200: register PERSON *pn;
201: PERSON *nethead, **nettail;
202: struct utmp user;
203: struct passwd *pw;
204: int dolocal, *used;
205:
206: if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int)))) {
207: (void)fprintf(stderr, "finger: out of space.\n");
208: exit(1);
209: }
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])
250: (void)fprintf(stderr,
251: "finger: %s: no such user.\n", argv[i]);
252:
253: /* handle network requests */
254: net: for (pn = nethead; pn; pn = pn->next) {
255: netfinger(pn->name);
256: if (pn->next || entries)
257: putchar('\n');
258: }
259:
260: if (entries == 0)
261: return;
262:
263: /*
264: * Scan thru the list of users currently logged in, saving
265: * appropriate data whenever a match occurs.
266: */
267: if (!freopen(_PATH_UTMP, "r", stdin)) {
268: (void)fprintf( stderr, "finger: can't read %s.\n", _PATH_UTMP);
269: exit(1);
270: }
271: while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
272: if (!user.ut_name[0])
273: continue;
274: if ((pn = find_person(user.ut_name)) == NULL)
275: continue;
276: enter_where(&user, pn);
277: }
278: for (pn = phead; pn != NULL; pn = pn->next)
279: enter_lastlog(pn);
280: }
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