NetBSD-5.0.2/usr.bin/finger/util.c
/* $NetBSD: util.c,v 1.27 2007/05/05 16:55:17 christos Exp $ */
/*
* 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. 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.
*/
/*
* Portions Copyright (c) 1983, 1995, 1996 Eric P. Allman
*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: util.c,v 1.27 2007/05/05 16:55:17 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <db.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include "utmpentry.h"
#include "finger.h"
#include "extern.h"
static void find_idle_and_ttywrite(WHERE *);
static void userinfo(PERSON *, struct passwd *);
static WHERE *walloc(PERSON *);
int
match(struct passwd *pw, char *user)
{
char *p;
char *bp, name[1024];
if (!strcasecmp(pw->pw_name, user))
return(1);
(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
/* Ampersands get replaced by the login name. */
if (!(p = strsep(&bp, ",")))
return(0);
expandusername(p, pw->pw_name, name, sizeof(name));
bp = name;
while ((p = strsep(&bp, "\t ")))
if (!strcasecmp(p, user))
return(1);
return(0);
}
/* inspired by usr.sbin/sendmail/util.c::buildfname */
void
expandusername(const char *gecos, const char *login, char *buf, int buflen)
{
const char *p;
char *bp;
/* why do we skip asterisks!?!? */
if (*gecos == '*')
gecos++;
bp = buf;
/* copy gecos, interpolating & to be full name */
for (p = gecos; *p != '\0'; p++) {
if (bp >= &buf[buflen - 1]) {
/* buffer overflow - just use login name */
snprintf(buf, buflen, "%s", login);
buf[buflen - 1] = '\0';
return;
}
if (*p == '&') {
/* interpolate full name */
snprintf(bp, buflen - (bp - buf), "%s", login);
*bp = toupper((unsigned char)*bp);
bp += strlen(bp);
}
else
*bp++ = *p;
}
*bp = '\0';
}
void
enter_lastlog(PERSON *pn)
{
WHERE *w;
static int opened, fd;
struct lastlog ll;
char doit = 0;
/* some systems may not maintain lastlog, don't report errors. */
if (!opened) {
fd = open(_PATH_LASTLOG, O_RDONLY, 0);
opened = 1;
}
if (fd == -1 ||
lseek(fd, (off_t)pn->uid * sizeof(ll), SEEK_SET) !=
(long)pn->uid * sizeof(ll) ||
read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) {
/* as if never logged in */
ll.ll_line[0] = ll.ll_host[0] = '\0';
ll.ll_time = 0;
}
if ((w = pn->whead) == NULL)
doit = 1;
else if (ll.ll_time != 0) {
/* if last login is earlier than some current login */
for (; !doit && w != NULL; w = w->next)
if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
doit = 1;
/*
* and if it's not any of the current logins
* can't use time comparison because there may be a small
* discrepency since login calls time() twice
*/
for (w = pn->whead; doit && w != NULL; w = w->next)
if (w->info == LOGGEDIN &&
strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
doit = 0;
}
if (doit) {
w = walloc(pn);
w->info = LASTLOG;
if ((w->tty = malloc(UT_LINESIZE + 1)) == NULL)
err(1, NULL);
memcpy(w->tty, ll.ll_line, UT_LINESIZE);
w->tty[UT_LINESIZE] = '\0';
if ((w->host = malloc(UT_HOSTSIZE + 1)) == NULL)
err(1, NULL);
memcpy(w->host, ll.ll_host, UT_HOSTSIZE);
w->host[UT_HOSTSIZE] = '\0';
w->loginat = ll.ll_time;
}
}
void
enter_where(struct utmpentry *ep, PERSON *pn)
{
WHERE *w = walloc(pn);
w->info = LOGGEDIN;
w->tty = ep->line;
w->host = ep->host;
w->loginat = (time_t)ep->tv.tv_sec;
find_idle_and_ttywrite(w);
}
PERSON *
enter_person(struct passwd *pw)
{
DBT data, key;
PERSON *pn;
if (db == NULL &&
(db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
err(1, NULL);
key.data = (char *)pw->pw_name;
key.size = strlen(pw->pw_name);
switch ((*db->get)(db, &key, &data, 0)) {
case 0:
memmove(&pn, data.data, sizeof pn);
return (pn);
default:
case -1:
err(1, "db get");
/* NOTREACHED */
case 1:
++entries;
pn = palloc();
userinfo(pn, pw);
pn->whead = NULL;
data.size = sizeof(PERSON *);
data.data = &pn;
if ((*db->put)(db, &key, &data, 0))
err(1, "db put");
return (pn);
}
}
PERSON *
find_person(char *name)
{
DBT data, key;
PERSON *p;
if (!db)
return(NULL);
key.data = name;
key.size = strlen(name);
if ((*db->get)(db, &key, &data, 0))
return (NULL);
memmove(&p, data.data, sizeof p);
return (p);
}
PERSON *
palloc(void)
{
PERSON *p;
if ((p = malloc((u_int) sizeof(PERSON))) == NULL)
err(1, NULL);
return(p);
}
static WHERE *
walloc(PERSON *pn)
{
WHERE *w;
if ((w = malloc((u_int) sizeof(WHERE))) == NULL)
err(1, NULL);
if (pn->whead == NULL)
pn->whead = pn->wtail = w;
else {
pn->wtail->next = w;
pn->wtail = w;
}
w->next = NULL;
return(w);
}
char *
prphone(char *num)
{
char *p;
int len;
static char pbuf[15];
/* don't touch anything if the user has their own formatting */
for (p = num; *p; ++p)
if (!isdigit((unsigned char)*p))
return(num);
len = p - num;
p = pbuf;
switch(len) {
case 11: /* +0-123-456-7890 */
*p++ = '+';
*p++ = *num++;
*p++ = '-';
/* FALLTHROUGH */
case 10: /* 012-345-6789 */
*p++ = *num++;
*p++ = *num++;
*p++ = *num++;
*p++ = '-';
/* FALLTHROUGH */
case 7: /* 012-3456 */
*p++ = *num++;
*p++ = *num++;
*p++ = *num++;
break;
case 5: /* x0-1234 */
case 4: /* x1234 */
*p++ = 'x';
*p++ = *num++;
break;
default:
return(num);
}
if (len != 4) {
*p++ = '-';
*p++ = *num++;
}
*p++ = *num++;
*p++ = *num++;
*p++ = *num++;
*p = '\0';
return(pbuf);
}
static void
find_idle_and_ttywrite(WHERE *w)
{
struct stat sb;
(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
if (stat(tbuf, &sb) < 0) {
warn("%s", tbuf);
return;
}
w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime;
#define TALKABLE 0220 /* tty is writable if 220 mode */
w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
}
static void
userinfo(PERSON *pn, struct passwd *pw)
{
char *p;
char *bp, name[1024];
struct stat sb;
pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
pn->uid = pw->pw_uid;
pn->name = strdup(pw->pw_name);
pn->dir = strdup(pw->pw_dir);
pn->shell = strdup(pw->pw_shell);
(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
/* ampersands get replaced by the login name */
if (!(p = strsep(&bp, ",")))
return;
expandusername(p, pw->pw_name, name, sizeof(name));
pn->realname = strdup(name);
pn->office = ((p = strsep(&bp, ",")) && *p) ?
strdup(p) : NULL;
pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
strdup(p) : NULL;
pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
strdup(p) : NULL;
(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR,
pw->pw_name);
pn->mailrecv = -1; /* -1 == not_valid */
if (stat(tbuf, &sb) < 0) {
if (errno != ENOENT) {
(void)fprintf(stderr,
"finger: %s: %s\n", tbuf, strerror(errno));
return;
}
} else if (sb.st_size != 0) {
pn->mailrecv = sb.st_mtime;
pn->mailread = sb.st_atime;
}
}