410 lines
10 KiB
C
410 lines
10 KiB
C
/* $NetBSD: util.c,v 1.28 2009/04/12 06:18:54 lukem Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions Copyright (c) 1983, 1995, 1996 Eric P. Allman
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*
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* This code is derived from software contributed to Berkeley by
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* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: util.c,v 1.28 2009/04/12 06:18:54 lukem Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <db.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmp.h>
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#include "utmpentry.h"
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#include "finger.h"
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#include "extern.h"
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static void find_idle_and_ttywrite(WHERE *);
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static void userinfo(PERSON *, struct passwd *);
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static WHERE *walloc(PERSON *);
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int
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match(struct passwd *pw, char *user)
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{
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char *p;
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char *bp, name[1024];
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if (!strcasecmp(pw->pw_name, user))
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return(1);
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(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
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/* Ampersands get replaced by the login name. */
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if (!(p = strsep(&bp, ",")))
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return(0);
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expandusername(p, pw->pw_name, name, sizeof(name));
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bp = name;
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while ((p = strsep(&bp, "\t ")))
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if (!strcasecmp(p, user))
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return(1);
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return(0);
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}
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/* inspired by usr.sbin/sendmail/util.c::buildfname */
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void
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expandusername(const char *gecos, const char *login, char *buf, int buflen)
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{
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const char *p;
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char *bp;
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/* why do we skip asterisks!?!? */
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if (*gecos == '*')
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gecos++;
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bp = buf;
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/* copy gecos, interpolating & to be full name */
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for (p = gecos; *p != '\0'; p++) {
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if (bp >= &buf[buflen - 1]) {
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/* buffer overflow - just use login name */
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snprintf(buf, buflen, "%s", login);
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buf[buflen - 1] = '\0';
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return;
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}
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if (*p == '&') {
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/* interpolate full name */
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snprintf(bp, buflen - (bp - buf), "%s", login);
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*bp = toupper((unsigned char)*bp);
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bp += strlen(bp);
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}
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else
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*bp++ = *p;
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}
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*bp = '\0';
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}
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void
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enter_lastlog(PERSON *pn)
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{
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WHERE *w;
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static int opened, fd;
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struct lastlog ll;
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char doit = 0;
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/* some systems may not maintain lastlog, don't report errors. */
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if (!opened) {
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fd = open(_PATH_LASTLOG, O_RDONLY, 0);
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opened = 1;
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}
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if (fd == -1 ||
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lseek(fd, (off_t)pn->uid * sizeof(ll), SEEK_SET) !=
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(off_t)pn->uid * (off_t)sizeof(ll) ||
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read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) {
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/* as if never logged in */
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ll.ll_line[0] = ll.ll_host[0] = '\0';
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ll.ll_time = 0;
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}
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if ((w = pn->whead) == NULL)
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doit = 1;
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else if (ll.ll_time != 0) {
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/* if last login is earlier than some current login */
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for (; !doit && w != NULL; w = w->next)
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if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
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doit = 1;
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/*
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* and if it's not any of the current logins
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* can't use time comparison because there may be a small
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* discrepency since login calls time() twice
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*/
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for (w = pn->whead; doit && w != NULL; w = w->next)
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if (w->info == LOGGEDIN &&
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strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
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doit = 0;
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}
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if (doit) {
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w = walloc(pn);
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w->info = LASTLOG;
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if ((w->tty = malloc(UT_LINESIZE + 1)) == NULL)
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err(1, NULL);
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memcpy(w->tty, ll.ll_line, UT_LINESIZE);
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w->tty[UT_LINESIZE] = '\0';
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if ((w->host = malloc(UT_HOSTSIZE + 1)) == NULL)
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err(1, NULL);
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memcpy(w->host, ll.ll_host, UT_HOSTSIZE);
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w->host[UT_HOSTSIZE] = '\0';
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w->loginat = ll.ll_time;
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}
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}
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void
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enter_where(struct utmpentry *ep, PERSON *pn)
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{
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WHERE *w = walloc(pn);
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w->info = LOGGEDIN;
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w->tty = ep->line;
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w->host = ep->host;
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w->loginat = (time_t)ep->tv.tv_sec;
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find_idle_and_ttywrite(w);
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}
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PERSON *
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enter_person(struct passwd *pw)
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{
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DBT data, key;
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PERSON *pn;
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if (db == NULL &&
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(db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
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err(1, NULL);
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key.data = (char *)pw->pw_name;
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key.size = strlen(pw->pw_name);
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switch ((*db->get)(db, &key, &data, 0)) {
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case 0:
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memmove(&pn, data.data, sizeof pn);
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return (pn);
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default:
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case -1:
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err(1, "db get");
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/* NOTREACHED */
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case 1:
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++entries;
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pn = palloc();
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userinfo(pn, pw);
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pn->whead = NULL;
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data.size = sizeof(PERSON *);
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data.data = &pn;
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if ((*db->put)(db, &key, &data, 0))
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err(1, "db put");
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return (pn);
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}
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}
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PERSON *
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find_person(char *name)
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{
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DBT data, key;
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PERSON *p;
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if (!db)
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return(NULL);
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key.data = name;
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key.size = strlen(name);
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if ((*db->get)(db, &key, &data, 0))
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return (NULL);
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memmove(&p, data.data, sizeof p);
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return (p);
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}
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PERSON *
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palloc(void)
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{
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PERSON *p;
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if ((p = malloc((u_int) sizeof(PERSON))) == NULL)
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err(1, NULL);
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return(p);
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}
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static WHERE *
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walloc(PERSON *pn)
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{
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WHERE *w;
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if ((w = malloc((u_int) sizeof(WHERE))) == NULL)
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err(1, NULL);
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if (pn->whead == NULL)
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pn->whead = pn->wtail = w;
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else {
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pn->wtail->next = w;
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pn->wtail = w;
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}
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w->next = NULL;
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return(w);
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}
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char *
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prphone(char *num)
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{
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char *p;
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int len;
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static char pbuf[15];
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/* don't touch anything if the user has their own formatting */
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for (p = num; *p; ++p)
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if (!isdigit((unsigned char)*p))
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return(num);
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len = p - num;
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p = pbuf;
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switch(len) {
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case 11: /* +0-123-456-7890 */
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*p++ = '+';
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*p++ = *num++;
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*p++ = '-';
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/* FALLTHROUGH */
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case 10: /* 012-345-6789 */
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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*p++ = '-';
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/* FALLTHROUGH */
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case 7: /* 012-3456 */
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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break;
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case 5: /* x0-1234 */
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case 4: /* x1234 */
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*p++ = 'x';
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*p++ = *num++;
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break;
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default:
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return(num);
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}
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if (len != 4) {
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*p++ = '-';
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*p++ = *num++;
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}
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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*p = '\0';
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return(pbuf);
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}
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static void
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find_idle_and_ttywrite(WHERE *w)
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{
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struct stat sb;
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(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
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if (stat(tbuf, &sb) < 0) {
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warn("%s", tbuf);
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return;
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}
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w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime;
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#define TALKABLE 0220 /* tty is writable if 220 mode */
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w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
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}
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static void
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userinfo(PERSON *pn, struct passwd *pw)
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{
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char *p;
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char *bp, name[1024];
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struct stat sb;
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pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
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pn->uid = pw->pw_uid;
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pn->name = strdup(pw->pw_name);
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pn->dir = strdup(pw->pw_dir);
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pn->shell = strdup(pw->pw_shell);
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(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
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/* ampersands get replaced by the login name */
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if (!(p = strsep(&bp, ",")))
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return;
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expandusername(p, pw->pw_name, name, sizeof(name));
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pn->realname = strdup(name);
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pn->office = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR,
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pw->pw_name);
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pn->mailrecv = -1; /* -1 == not_valid */
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if (stat(tbuf, &sb) < 0) {
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if (errno != ENOENT) {
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(void)fprintf(stderr,
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"finger: %s: %s\n", tbuf, strerror(errno));
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return;
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}
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} else if (sb.st_size != 0) {
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pn->mailrecv = sb.st_mtime;
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pn->mailread = sb.st_atime;
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}
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}
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