/* $OpenBSD: finger.c,v 1.28 2022/12/04 23:50:48 cheloha Exp $ */ /* * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Luke Mewburn <lukem@netbsd.org> added the following on 961121: * - mail status ("No Mail", "Mail read:...", or "New Mail ..., * Unread since ...".) * - 4 digit phone extensions (3210 is printed as x3210.) * - host/office toggling in short format with -h & -o. * - short day names (`Tue' printed instead of `Jun 21' if the * login time is < 6 days. */ /* * Finger prints out information about users. It is not portable since * certain fields (e.g. the full user name, office, and phone numbers) are * extracted from the gecos field of the passwd file which other UNIXes * may not have or may use for other things. * * There are currently two output formats; the short format is one line * per user and displays login name, tty, login time, real name, idle time, * and either remote host information (default) or office location/phone * number, depending on if -h or -o is used respectively. * The long format gives the same information (in a more legible format) as * well as home directory, shell, mail info, and .plan/.project files. */ #include <sys/stat.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> #include <unistd.h> #include <limits.h> #include <err.h> #include "finger.h" #include "extern.h" time_t now; int entries, lflag, sflag, mflag, oflag, pplan, Mflag; char tbuf[1024]; PERSON *htab[HSIZE]; PERSON *phead, *ptail; int main(int argc, char *argv[]) { extern int optind; extern char *__progname; int ch; char domain[HOST_NAME_MAX+1]; struct stat sb; oflag = 1; /* default to old "office" behavior */ while ((ch = getopt(argc, argv, "lmMpsho")) != -1) switch(ch) { case 'l': lflag = 1; /* long format */ break; case 'm': mflag = 1; /* force exact match of names */ break; case 'M': Mflag = 1; /* allow name matching */ break; case 'p': pplan = 1; /* don't show .plan/.project */ break; case 's': sflag = 1; /* short format */ break; case 'h': oflag = 0; /* remote host info */ break; case 'o': oflag = 1; /* office info */ break; default: (void)fprintf(stderr, "usage: %s [-hlMmops] [login ...]\n", __progname); exit(1); } argc -= optind; argv += optind; /* If a domainname is set, increment mflag. */ if ((getdomainname(domain, sizeof(domain)) == 0) && domain[0]) mflag++; /* If _PATH_MP_DB is larger than 1MB, increment mflag. */ if (stat(_PATH_MP_DB, &sb) == 0) { if (sb.st_size > 1048576) mflag++; } if (pledge("stdio rpath getpw dns inet", NULL) == -1) err(1, "pledge"); (void)time(&now); if (!*argv) { /* * Assign explicit "small" format if no names given and -l * not selected. Force the -s BEFORE we get names so proper * screening will be done. */ if (pledge("stdio rpath getpw", NULL) == -1) err(1, "pledge"); if (!lflag) sflag = 1; /* if -l not explicit, force -s */ loginlist(); if (entries == 0) (void)printf("No one logged on.\n"); } else { userlist(argc, argv); /* * Assign explicit "large" format if names given and -s not * explicitly stated. Force the -l AFTER we get names so any * remote finger attempts specified won't be mishandled. */ if (!sflag) lflag = 1; /* if -s not explicit, force -l */ } if (entries != 0) { if (lflag) lflag_print(); else sflag_print(); } exit(0); } void loginlist(void) { PERSON *pn; struct passwd *pw; struct utmp user; char name[UT_NAMESIZE + 1]; if (!freopen(_PATH_UTMP, "r", stdin)) err(2, _PATH_UTMP); name[UT_NAMESIZE] = '\0'; setpassent(1); while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { if (!user.ut_name[0]) continue; if ((pn = find_person(user.ut_name)) == NULL) { bcopy(user.ut_name, name, UT_NAMESIZE); if ((pw = getpwnam(name)) == NULL) continue; pn = enter_person(pw); } enter_where(&user, pn); } endpwent(); for (pn = phead; lflag && pn != NULL; pn = pn->next) enter_lastlog(pn); } void userlist(int argc, char **argv) { int i; PERSON *pn; PERSON *nethead, **nettail; struct utmp user; struct passwd *pw; int dolocal, *used; if (!(used = calloc((u_int)argc, (u_int)sizeof(int)))) err(2, "malloc"); /* pull out all network requests */ for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) { if (!strchr(argv[i], '@')) { dolocal = 1; continue; } pn = palloc(); *nettail = pn; nettail = &pn->next; pn->name = argv[i]; used[i] = -1; } *nettail = NULL; if (!dolocal) goto net; if (nettail == &nethead) if (pledge("stdio rpath getpw", NULL) == -1) err(1, "pledge"); /* * traverse the list of possible login names and check the login name * and real name against the name specified by the user. */ setpassent(1); if ((mflag - Mflag) > 0) { for (i = 0; i < argc; i++) if (used[i] >= 0 && (pw = getpwnam(argv[i]))) { enter_person(pw); used[i] = 1; } } else while ((pw = getpwent()) != NULL) for (i = 0; i < argc; i++) if (used[i] >= 0 && (!strcasecmp(pw->pw_name, argv[i]) || match(pw, argv[i]))) { enter_person(pw); used[i] = 1; } endpwent(); /* list errors */ for (i = 0; i < argc; i++) if (!used[i]) warnx("%s: no such user.", argv[i]); /* handle network requests */ net: for (pn = nethead; pn; pn = pn->next) { netfinger(pn->name); if (pn->next || entries) putchar('\n'); } free(used); if (entries == 0) return; /* * Scan thru the list of users currently logged in, saving * appropriate data whenever a match occurs. */ if (!freopen(_PATH_UTMP, "r", stdin)) err(1, _PATH_UTMP); while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { if (!user.ut_name[0]) continue; if ((pn = find_person(user.ut_name)) == NULL) continue; enter_where(&user, pn); } for (pn = phead; pn != NULL; pn = pn->next) enter_lastlog(pn); }
