usr.bin/finger/finger.c

   1 /*      $NetBSD: finger.c,v 1.28 2008/07/21 14:19:22 lukem Exp $        */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  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 /*
  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.
  43  */
  44
  45 #include <sys/cdefs.h>
  46 #ifndef lint
  47 __COPYRIGHT("@(#) Copyright (c) 1989, 1993\
  48  The Regents of the University of California.  All rights reserved.");
  49 #endif /* not lint */
  50
  51 #ifndef lint
  52 #if 0
  53 static char sccsid[] = "@(#)finger.c    8.5 (Berkeley) 5/4/95";
  54 #else
  55 __RCSID("$NetBSD: finger.c,v 1.28 2008/07/21 14:19:22 lukem Exp $");
  56 #endif
  57 #endif /* not lint */
  58
  59 /*
  60  * Finger prints out information about users.  It is not portable since
  61  * certain fields (e.g. the full user name, office, and phone numbers) are
  62  * extracted from the gecos field of the passwd file which other UNIXes
  63  * may not have or may use for other things.
  64  *
  65  * There are currently two output formats; the short format is one line
  66  * per user and displays login name, tty, login time, real name, idle time,
  67  * and either remote host information (default) or office location/phone
  68  * number, depending on if -h or -o is used respectively.
  69  * The long format gives the same information (in a more legible format) as
  70  * well as home directory, shell, mail info, and .plan/.project files.
  71  */
  72
  73 #include <sys/param.h>
  74
  75 #include <db.h>
  76 #include <err.h>
  77 #include <errno.h>
  78 #include <fcntl.h>
  79 #include <pwd.h>
  80 #include <stdio.h>
  81 #include <stdlib.h>
  82 #include <string.h>
  83 #include <time.h>
  84 #include <unistd.h>
  85
  86 #include <locale.h>
  87 #include <langinfo.h>
  88
  89 #include "utmpentry.h"
  90
  91 #include "finger.h"
  92 #include "extern.h"
  93
  94 DB *db;
  95 time_t now;
  96 int entries, gflag, lflag, mflag, oflag, sflag, eightflag, pplan;
  97 char tbuf[1024];
  98 struct utmpentry *ehead;
  99
 100 static void loginlist(void);
 101 static void userlist(int, char **);
 102 int main(int, char **);
 103
 104 int
 105 main(int argc, char **argv)
 106 {
 107         int ch;
 108
 109         /* Allow user's locale settings to affect character output. */
 110         setlocale(LC_CTYPE, "");
 111
 112         /*
 113          * Reset back to the C locale, unless we are using a known
 114          * single-byte 8-bit locale.
 115          */
 116         if (strncmp(nl_langinfo(CODESET), "ISO8859-", 8))
 117                 setlocale(LC_CTYPE, "C");
 118
 119         oflag = 1;              /* default to old "office" behavior */
 120
 121         while ((ch = getopt(argc, argv, "lmpshog8")) != -1)
 122                 switch(ch) {
 123                 case 'l':
 124                         lflag = 1;              /* long format */
 125                         break;
 126                 case 'm':
 127                         mflag = 1;              /* force exact match of names */
 128                         break;
 129                 case 'p':
 130                         pplan = 1;              /* don't show .plan/.project */
 131                         break;
 132                 case 's':
 133                         sflag = 1;              /* short format */
 134                         break;
 135                 case 'h':
 136                         oflag = 0;              /* remote host info */
 137                         break;
 138                 case 'o':
 139                         oflag = 1;              /* office info */
 140                         break;
 141                 case 'g':
 142                         gflag = 1;              /* no gecos info, besides name */
 143                         break;
 144                 case '8':
 145                         eightflag = 1;          /* 8-bit pass-through */
 146                         break;
 147                 case '?':
 148                 default:
 149                         (void)fprintf(stderr,
 150                             "usage: finger [-lmpshog8] [login ...]\n");
 151                         exit(1);
 152                 }
 153         argc -= optind;
 154         argv += optind;
 155
 156         (void)time(&now);
 157         setpassent(1);
 158         entries = getutentries(NULL, &ehead);
 159         if (argc == 0) {
 160                 /*
 161                  * Assign explicit "small" format if no names given and -l
 162                  * not selected.  Force the -s BEFORE we get names so proper
 163                  * screening will be done.
 164                  */
 165                 if (!lflag)
 166                         sflag = 1;      /* if -l not explicit, force -s */
 167                 loginlist();
 168                 if (entries == 0)
 169                         (void)printf("No one logged on.\n");
 170         } else {
 171                 userlist(argc, argv);
 172                 /*
 173                  * Assign explicit "large" format if names given and -s not
 174                  * explicitly stated.  Force the -l AFTER we get names so any
 175                  * remote finger attempts specified won't be mishandled.
 176                  */
 177                 if (!sflag)
 178                         lflag = 1;      /* if -s not explicit, force -l */
 179         }
 180         if (entries) {
 181                 if (lflag)
 182                         lflag_print();
 183                 else
 184                         sflag_print();
 185         }
 186         return (0);
 187 }
 188
 189 static void
 190 loginlist(void)
 191 {
 192         PERSON *pn;
 193         DBT data, key;
 194         struct passwd *pw;
 195         int r, seqflag;
 196         struct utmpentry *ep;
 197
 198         for (ep = ehead; ep; ep = ep->next) {
 199                 if ((pn = find_person(ep->name)) == NULL) {
 200                         if ((pw = getpwnam(ep->name)) == NULL)
 201                                 continue;
 202                         pn = enter_person(pw);
 203                 }
 204                 enter_where(ep, pn);
 205         }
 206         if (db && lflag)
 207                 for (seqflag = R_FIRST;; seqflag = R_NEXT) {
 208                         PERSON *tmp;
 209
 210                         r = (*db->seq)(db, &key, &data, seqflag);
 211                         if (r == -1)
 212                                 err(1, "db seq");
 213                         if (r == 1)
 214                                 break;
 215                         memmove(&tmp, data.data, sizeof tmp);
 216                         enter_lastlog(tmp);
 217                 }
 218 }
 219
 220 static void
 221 userlist(int argc, char **argv)
 222 {
 223         PERSON *pn;
 224         DBT data, key;
 225         struct passwd *pw;
 226         int r, seqflag, *used, *ip;
 227         char **ap, **nargv, **np, **p;
 228         struct utmpentry *ep;
 229
 230         if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL ||
 231             (used = calloc(argc, sizeof(int))) == NULL)
 232                 err(1, NULL);
 233
 234         /* Pull out all network requests. */
 235         for (ap = p = argv, np = nargv; *p; ++p)
 236                 if (strchr(*p, '@'))
 237                         *np++ = *p;
 238                 else
 239                         *ap++ = *p;
 240
 241         *np++ = NULL;
 242         *ap++ = NULL;
 243
 244         if (!*argv)
 245                 goto net;
 246
 247         /*
 248          * Traverse the list of possible login names and check the login name
 249          * and real name against the name specified by the user.
 250          */
 251         if (mflag) {
 252                 for (p = argv; *p; ++p)
 253                         if ((pw = getpwnam(*p)) != NULL)
 254                                 enter_person(pw);
 255                         else
 256                                 warnx("%s: no such user", *p);
 257         } else {
 258                 while ((pw = getpwent()) != NULL)
 259                         for (p = argv, ip = used; *p; ++p, ++ip)
 260                                 if (match(pw, *p)) {
 261                                         enter_person(pw);
 262                                         *ip = 1;
 263                                 }
 264                 for (p = argv, ip = used; *p; ++p, ++ip)
 265                         if (!*ip)
 266                                 warnx("%s: no such user", *p);
 267         }
 268
 269         /* Handle network requests. */
 270 net:
 271         for (p = nargv; *p;)
 272                 netfinger(*p++);
 273
 274         if (entries == 0)
 275                 goto done;
 276
 277         /*
 278          * Scan thru the list of users currently logged in, saving
 279          * appropriate data whenever a match occurs.
 280          */
 281         for (ep = ehead; ep; ep = ep->next) {
 282                 if ((pn = find_person(ep->name)) == NULL)
 283                         continue;
 284                 enter_where(ep, pn);
 285         }
 286         if (db != NULL)
 287                 for (seqflag = R_FIRST;; seqflag = R_NEXT) {
 288                         PERSON *tmp;
 289
 290                         r = (*db->seq)(db, &key, &data, seqflag);
 291                         if (r == -1)
 292                                 err(1, "db seq");
 293                         if (r == 1)
 294                                 break;
 295                         memmove(&tmp, data.data, sizeof tmp);
 296                         enter_lastlog(tmp);
 297                 }
 298 done:
 299         free(nargv);
 300         free(used);
 301 }