/* * Copyright (c) 1989, 1993 * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. * @(#)finger.c 8.5 (Berkeley) 5/4/95 * $FreeBSD: src/usr.bin/finger/finger.c,v 1.15.2.9 2002/07/29 18:52:52 ume Exp $ * $DragonFly: src/usr.bin/finger/finger.c,v 1.2 2003/06/17 04:29:26 dillon Exp $ */ /* * Luke Mewburn added the following on 940622: * - 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 #include #include #include #include #include #include #include #include #include #include #include #include "finger.h" #include "pathnames.h" DB *db; time_t now; int entries, gflag, lflag, mflag, pplan, sflag, oflag, Tflag; sa_family_t family = PF_UNSPEC; int d_first = -1; char tbuf[1024]; static void loginlist(void); static int option(int, char **); static void usage(void); static void userlist(int, char **); static int option(argc, argv) int argc; char **argv; { int ch; optind = 1; /* reset getopt */ while ((ch = getopt(argc, argv, "46glmpshoT")) != -1) switch(ch) { case '4': family = AF_INET; break; case '6': family = AF_INET6; break; case 'g': gflag = 1; break; case 'l': lflag = 1; /* long format */ break; case 'm': mflag = 1; /* force exact match of names */ 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; case 'T': Tflag = 1; /* disable T/TCP */ break; case '?': default: usage(); } return optind; } static void usage() { (void)fprintf(stderr, "usage: finger [-46lmpshoT] [login ...]\n"); exit(1); } int main(argc, argv) int argc; char **argv; { int envargc, argcnt; char *envargv[3]; struct passwd *pw; static char myname[] = "finger"; if (getuid() == 0 || geteuid() == 0) { if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) { setgid(pw->pw_gid); setuid(pw->pw_uid); } else { setgid(UNPRIV_UGID); setuid(UNPRIV_UGID); } } (void) setlocale(LC_ALL, ""); /* remove this line to get remote host */ oflag = 1; /* default to old "office" behavior */ /* * Process environment variables followed by command line arguments. */ if ((envargv[1] = getenv("FINGER"))) { envargc = 2; envargv[0] = myname; envargv[2] = NULL; (void) option(envargc, envargv); } argcnt = option(argc, argv); argc -= argcnt; argv += argcnt; (void)time(&now); setpassent(1); 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 (!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) { if (lflag) lflag_print(); else sflag_print(); } return (0); } static void loginlist() { PERSON *pn; DBT data, key; struct passwd *pw; struct utmp user; int r, sflag1; char name[UT_NAMESIZE + 1]; if (!freopen(_PATH_UTMP, "r", stdin)) err(1, "%s", _PATH_UTMP); name[UT_NAMESIZE] = '\0'; 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; if (hide(pw)) continue; pn = enter_person(pw); } enter_where(&user, pn); } if (db && lflag) for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { PERSON *tmp; r = (*db->seq)(db, &key, &data, sflag1); if (r == -1) err(1, "db seq"); if (r == 1) break; memmove(&tmp, data.data, sizeof tmp); enter_lastlog(tmp); } } static void userlist(argc, argv) int argc; char **argv; { PERSON *pn; DBT data, key; struct utmp user; struct passwd *pw; int r, sflag1, *used, *ip; char **ap, **nargv, **np, **p; FILE *conf_fp; char conf_alias[LINE_MAX]; char *conf_realname; int conf_length; if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || (used = calloc(argc, sizeof(int))) == NULL) err(1, NULL); /* Pull out all network requests. */ for (ap = p = argv, np = nargv; *p; ++p) if (index(*p, '@')) *np++ = *p; else *ap++ = *p; *np++ = NULL; *ap++ = NULL; if (!*argv) goto net; /* * Mark any arguments beginning with '/' as invalid so that we * don't accidently confuse them with expansions from finger.conf */ for (p = argv, ip = used; *p; ++p, ++ip) if (**p == '/') { *ip = 1; warnx("%s: no such user", *p); } /* * Traverse the finger alias configuration file of the form * alias:(user|alias), ignoring comment lines beginning '#'. */ if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) { while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) { conf_length = strlen(conf_alias); if (*conf_alias == '#' || conf_alias[--conf_length] != '\n') continue; conf_alias[conf_length] = '\0'; /* Remove trailing LF */ if ((conf_realname = strchr(conf_alias, ':')) == NULL) continue; *conf_realname = '\0'; /* Replace : with NUL */ for (p = argv; *p; ++p) { if (strcmp(*p, conf_alias) == NULL) { if ((*p = strdup(conf_realname+1)) == NULL) { err(1, NULL); } } } } (void)fclose(conf_fp); } /* * Traverse the list of possible login names and check the login name * and real name against the name specified by the user. If the name * begins with a '/', try to read the file of that name instead of * gathering the traditional finger information. */ if (mflag) for (p = argv, ip = used; *p; ++p, ++ip) { if (**p != '/' || *ip == 1 || !show_text("", *p, "")) { if (((pw = getpwnam(*p)) != NULL) && !hide(pw)) enter_person(pw); else if (!*ip) warnx("%s: no such user", *p); } } else { while ((pw = getpwent()) != NULL) { for (p = argv, ip = used; *p; ++p, ++ip) if (**p == '/' && *ip != 1 && show_text("", *p, "")) *ip = 1; else if (match(pw, *p) && !hide(pw)) { enter_person(pw); *ip = 1; } } for (p = argv, ip = used; *p; ++p, ++ip) if (!*ip) warnx("%s: no such user", *p); } /* Handle network requests. */ net: for (p = nargv; *p;) { netfinger(*p++); if (*p || entries) printf("\n"); } 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, "%s", _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); } if (db) for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { PERSON *tmp; r = (*db->seq)(db, &key, &data, sflag1); if (r == -1) err(1, "db seq"); if (r == 1) break; memmove(&tmp, data.data, sizeof tmp); enter_lastlog(tmp); } }