New upstream version 0.17upstream

1 files changed, 334 insertions, 0 deletions

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();
+}