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authorKatolaZ <katolaz@freaknet.org>2019-02-08 05:13:11 +0000
committerKatolaZ <katolaz@freaknet.org>2019-02-08 05:13:11 +0000
commit172540a4a29fa4c0c5f0431bb5bf5b3d08ec92c0 (patch)
treeac15b0b8ae60a42ffe04b3fd37cf2fbc97b2ddd6 /finger/finger.c
New upstream version 0.17upstream
Diffstat (limited to 'finger/finger.c')
-rw-r--r--finger/finger.c334
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diff --git a/finger/finger.c b/finger/finger.c
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+/*
+ * 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. 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.
+ */
+
+/*
+ * Mail status reporting added 931007 by Luke Mewburn, <zak@rmit.edu.au>.
+ */
+
+char copyright[] =
+ "@(#) Copyright (c) 1989 The Regents of the University of California.\n"
+ "All rights reserved.\n";
+
+/*
+ * from: @(#)finger.c 5.22 (Berkeley) 6/29/90
+ */
+char finger_rcsid[] = \
+ "$Id: finger.c,v 1.15 1999/12/18 16:41:51 dholland Exp $";
+
+/*
+ * 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. (This is not really true any
+ * more, btw.)
+ *
+ * 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 office location/phone number. 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/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <time.h>
+#include <getopt.h>
+#include "finger.h"
+#include "../version.h"
+
+static void loginlist(void);
+static void userlist(int argc, char *argv[]);
+
+int lflag, pplan;
+static int sflag, mflag;
+static int enable_nofinger;
+
+time_t now;
+char tbuf[TBUFLEN];
+
+PERSON *phead, *ptail; /* the linked list of all people */
+int entries; /* number of people */
+
+
+int main(int argc, char *argv[]) {
+ int ch;
+ struct sockaddr_in sin;
+ socklen_t slen = sizeof(sin);
+
+ while ((ch = getopt(argc, argv, "lmps")) != EOF) {
+ switch(ch) {
+ case 'l':
+ lflag = 1; /* long format */
+ break;
+ case 'm':
+ mflag = 1; /* do exact match of names */
+ break;
+ case 'p':
+ pplan = 1; /* don't show .plan/.project */
+ break;
+ case 's':
+ sflag = 1; /* short format */
+ break;
+ case '?':
+ case 'h':
+ default:
+ eprintf("usage: finger [-lmps] [login ...]\n");
+ return 1;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (getsockname(STDOUT_FILENO, (struct sockaddr *)&sin, &slen)==0) {
+ /*
+ * stdout is a socket. must be a network finger request,
+ * so emit CRs with our LFs at the ends of lines.
+ */
+ set_crmode();
+
+ /*
+ * Also, enable .nofinger processing.
+ */
+ enable_nofinger = 1;
+ }
+
+ /*
+ * Also check stdin for nofinger processing, because of older
+ * fingerds that make stdout a pipe for CRLF handling.
+ */
+ if (getsockname(STDIN_FILENO, (struct sockaddr *)&sin, &slen)==0) {
+ enable_nofinger = 1;
+ }
+
+ time(&now);
+
+ setpwent();
+
+ 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) {
+ xprintf("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();
+ }
+ return 0;
+}
+
+/* Returns 1 if .nofinger is found and enable_nofinger is set. */
+static
+int
+check_nofinger(struct passwd *pw)
+{
+ if (enable_nofinger) {
+ char path[PATH_MAX];
+ struct stat tripe;
+ snprintf(path, sizeof(path), "%s/.nofinger", pw->pw_dir);
+ if (stat(path, &tripe)==0) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static void
+loginlist(void)
+{
+ PERSON *pn;
+ struct passwd *pw;
+ struct utmp *uptr;
+ char name[UT_NAMESIZE + 1];
+
+ name[UT_NAMESIZE] = '\0';
+
+ /*
+ * if (!freopen(_PATH_UTMP, "r", stdin)) {
+ * fprintf(stderr, "finger: can't read %s.\n", _PATH_UTMP);
+ * exit(2);
+ * }
+ */
+ setutent();
+ while ((uptr = getutent())!=NULL) {
+ if (!uptr->ut_name[0])
+ continue;
+#ifdef USER_PROCESS
+ if (uptr->ut_type != USER_PROCESS) continue;
+#endif
+ if ((pn = find_person(uptr->ut_name)) == NULL) {
+ memcpy(name, uptr->ut_name, UT_NAMESIZE);
+ if ((pw = getpwnam(name)) == NULL)
+ continue;
+ if (check_nofinger(pw))
+ continue;
+ pn = enter_person(pw);
+ }
+ enter_where(uptr, pn);
+ }
+ for (pn = phead; lflag && pn != NULL; pn = pn->next)
+ enter_lastlog(pn);
+ endutent();
+}
+
+
+static void do_local(int argc, char *argv[], int *used) {
+ int i;
+ struct passwd *pw;
+
+ /*
+ * traverse the list of possible login names and check the login name
+ * and real name against the name specified by the user.
+ */
+ if (mflag) {
+ for (i = 0; i < argc; i++)
+ if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
+ if (!check_nofinger(pw)) {
+ enter_person(pw);
+ used[i] = 1;
+ }
+ }
+ } else for (pw = getpwent(); pw; pw = getpwent())
+ for (i = 0; i < argc; i++)
+ if (used[i] >= 0 &&
+ (!strcasecmp(pw->pw_name, argv[i]) ||
+ match(pw, argv[i]))) {
+ if (!check_nofinger(pw)) {
+ enter_person(pw);
+ used[i] = 1;
+ }
+ }
+
+ /* list errors */
+ for (i = 0; i < argc; i++)
+ if (!used[i])
+ (void)eprintf("finger: %s: no such user.\n", argv[i]);
+
+}
+
+static void
+userlist(int argc, char *argv[])
+{
+ int i;
+ PERSON *pn;
+ PERSON *nethead, **nettail;
+ struct utmp *uptr;
+ int dolocal, *used;
+
+ used = calloc(argc, sizeof(int));
+ if (!used) {
+ eprintf("finger: out of space.\n");
+ exit(1);
+ }
+
+ /* 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) do_local(argc, argv, used);
+
+ /* handle network requests */
+ for (pn = nethead; pn; pn = pn->next) {
+ netfinger(pn->name);
+ if (pn->next || entries)
+ xputc('\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)) {
+ * (void)fprintf( stderr, "finger: can't read %s.\n", _PATH_UTMP);
+ * exit(1);
+ * }
+ */
+ setutent();
+ while ((uptr = getutent())!=NULL) {
+ if (!uptr->ut_name[0])
+ continue;
+#ifdef USER_PROCESS
+ if (uptr->ut_type != USER_PROCESS) continue;
+#endif
+ if ((pn = find_person(uptr->ut_name)) == NULL) {
+ continue;
+ }
+ enter_where(uptr, pn);
+ }
+ for (pn = phead; pn != NULL; pn = pn->next) {
+ enter_lastlog(pn);
+ }
+ endutent();
+}