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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.
*/
#ifndef lint
/*static char sccsid[] = "from: @(#)util.c 5.14 (Berkeley) 1/17/91";*/
char util_rcsid[] = "$Id: util.c,v 1.18 1999/09/28 22:53:58 netbug Exp $";
#endif /* not lint */
#include <sys/types.h>
/* #include <sys/param.h> <--- unused? */
#include <sys/stat.h>
#include <sys/file.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <paths.h>
#include <errno.h>
#include <lastlog.h>
#include <unistd.h>
#include <stdlib.h>
#include "finger.h"
#define HBITS 8 /* number of bits in hash code */
#define HSIZE (1 << 8) /* hash table size */
#define HMASK (HSIZE - 1) /* hash code mask */
static PERSON *htab[HSIZE]; /* the buckets */
static int hash(const char *name);
static void find_idle_and_ttywrite(register WHERE *w) {
struct stat sb;
/* No device for X console. Utmp entry by XDM login (":0"). */
if (strchr(w->tty, ':')) {
w->idletime = 0; /* would be nice to have it emit ??? */
w->writable = 0;
return;
}
snprintf(tbuf, TBUFLEN, "%s/%s", _PATH_DEV, w->tty);
if (stat(tbuf, &sb) < 0) {
eprintf("finger: %s: %s\n", tbuf, strerror(errno));
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;
struct stat sb;
char *bp;
char *rname;
int i, j, ct;
char *fields[4];
int nfields;
pn->uid = pw->pw_uid;
pn->name = strdup(pw->pw_name);
pn->dir = strdup(pw->pw_dir);
pn->shell = strdup(pw->pw_shell);
/* make a private copy of gecos to munge */
strncpy(tbuf, pw->pw_gecos, TBUFLEN);
tbuf[TBUFLEN-1] = 0; /* ensure null termination */
bp = tbuf;
/* why do we skip asterisks!?!? */
if (*bp == '*') ++bp;
/*
* fields[0] -> real name
* fields[1] -> office
* fields[2] -> officephone
* fields[3] -> homephone
*/
nfields = 0;
while ((p = strsep(&bp, ","))) {
if (nfields < 4) fields[nfields++] = *p ? p : NULL;
}
while (nfields<4) fields[nfields++] = NULL;
if (fields[0]) {
/*
* Ampersands in gecos get replaced by the capitalized login
* name. This is a major nuisance and whoever thought it up
* should be shot.
*/
p = fields[0];
/* First, count the number of ampersands. */
for (ct=i=0; p[i]; i++) if (p[i]=='&') ct++;
/* This tells us how much space we need to copy the name. */
rname = malloc(strlen(p) + ct*strlen(pw->pw_name) + 1);
if (!rname) {
eprintf("finger: Out of space.\n");
exit(1);
}
/* Now, do it */
for (i=j=0; p[i]; i++) {
if (p[i]=='&') {
strcpy(rname + j, pw->pw_name);
if (islower(rname[j])) {
rname[j] = toupper(rname[j]);
}
j += strlen(pw->pw_name);
}
else {
rname[j++] = p[i];
}
}
rname[j] = 0;
pn->realname = rname;
}
else {
pn->realname = NULL;
}
pn->office = fields[1] ? strdup(fields[1]) : NULL;
pn->officephone = fields[2] ? strdup(fields[2]) : NULL;
pn->homephone = fields[3] ? strdup(fields[3]) : NULL;
pn->mailrecv = -1; /* -1 == not_valid */
pn->mailread = -1; /* -1 == not_valid */
snprintf(tbuf, TBUFLEN, "%s/%s", _PATH_MAILDIR, pw->pw_name);
if (stat(tbuf, &sb) < 0) {
if (errno != ENOENT) {
eprintf("finger: %s: %s\n", tbuf, strerror(errno));
return;
}
}
else if (sb.st_size != 0) {
pn->mailrecv = sb.st_mtime;
pn->mailread = sb.st_atime;
}
}
int
match(struct passwd *pw, const char *user)
{
char *p;
int i, j, ct, rv=0;
char *rname;
if (pw->pw_gecos == NULL) return 0;
strncpy(tbuf, pw->pw_gecos, TBUFLEN);
tbuf[TBUFLEN-1] = 0; /* guarantee null termination */
p = tbuf;
/* why do we skip asterisks!?!? */
if (*p == '*') ++p;
/* truncate the uninteresting stuff off the end of gecos */
p = strtok(p, ",");
if (!p) return 0;
/*
* Ampersands get replaced by the login name.
*/
/* First, count the number of ampersands. */
for (ct=i=0; p[i]; i++) if (p[i]=='&') ct++;
/* This tells us how much space we need to copy the name. */
rname = malloc(strlen(p) + ct*strlen(pw->pw_name) + 1);
if (!rname) {
eprintf("finger: Out of space.\n");
exit(1);
}
/* Now, do it */
for (i=j=0; p[i]; i++) {
if (p[i]=='&') {
strcpy(rname + j, pw->pw_name);
if (islower(rname[j])) rname[j] = toupper(rname[j]);
j += strlen(pw->pw_name);
}
else {
rname[j++] = p[i];
}
}
rname[j] = 0;
for (p = strtok(rname, "\t "); p && !rv; p = strtok(NULL, "\t ")) {
if (!strcasecmp(p, user))
rv = 1;
}
free(rname);
return rv;
}
static int get_lastlog(int fd, uid_t uid, struct lastlog *ll) {
loff_t pos;
if (fd == -1) return -1;
pos = (long)uid * sizeof(*ll);
if (lseek(fd, pos, L_SET) != pos) return -1;
if (read(fd, ll, sizeof(*ll)) != sizeof(*ll)) return -1;
return 0;
}
void enter_lastlog(PERSON *pn) {
static int opened = 0, fd = -1;
WHERE *w;
struct lastlog ll;
int doit = 0;
/* some systems may not maintain lastlog, don't report errors. */
if (!opened) {
fd = open(_PATH_LASTLOG, O_RDONLY, 0);
opened = 1;
}
if (get_lastlog(fd, pn->uid, &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;
bcopy(ll.ll_line, w->tty, UT_LINESIZE);
w->tty[UT_LINESIZE] = 0;
bcopy(ll.ll_host, w->host, UT_HOSTSIZE);
w->host[UT_HOSTSIZE] = 0;
w->loginat = ll.ll_time;
}
}
void enter_where(struct utmp *ut, PERSON *pn) {
register WHERE *w = walloc(pn);
w->info = LOGGEDIN;
bcopy(ut->ut_line, w->tty, UT_LINESIZE);
w->tty[UT_LINESIZE] = 0;
bcopy(ut->ut_host, w->host, UT_HOSTSIZE);
w->host[UT_HOSTSIZE] = 0;
w->loginat = ut->ut_time;
find_idle_and_ttywrite(w);
}
PERSON * enter_person(struct passwd *pw) {
register PERSON *pn, **pp;
for (pp = htab + hash(pw->pw_name);
*pp != NULL && strcmp((*pp)->name, pw->pw_name) != 0;
pp = &(*pp)->hlink)
;
if ((pn = *pp) == NULL) {
pn = palloc();
entries++;
if (phead == NULL)
phead = ptail = pn;
else {
ptail->next = pn;
ptail = pn;
}
pn->next = NULL;
pn->hlink = NULL;
*pp = pn;
userinfo(pn, pw);
pn->whead = NULL;
}
return(pn);
}
PERSON *find_person(const char *name) {
register PERSON *pn;
/* name may be only UT_NAMESIZE long and not terminated */
for (pn = htab[hash(name)];
pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0;
pn = pn->hlink)
;
return(pn);
}
static int hash(const char *name) {
register int h, i;
h = 0;
/* name may be only UT_NAMESIZE long and not terminated */
for (i = UT_NAMESIZE; --i >= 0 && *name;)
h = ((h << 2 | h >> (HBITS - 2)) ^ *name++) & HMASK;
return(h);
}
PERSON *palloc(void) {
PERSON *p;
if ((p = (PERSON *)malloc((u_int) sizeof(PERSON))) == NULL) {
eprintf("finger: Out of space.\n");
exit(1);
}
return(p);
}
WHERE *
walloc(PERSON *pn)
{
register WHERE *w;
if ((w = (WHERE *)malloc((u_int) sizeof(WHERE))) == NULL) {
eprintf("finger: Out of space.\n");
exit(1);
}
if (pn->whead == NULL)
pn->whead = pn->wtail = w;
else {
pn->wtail->next = w;
pn->wtail = w;
}
w->next = NULL;
return(w);
}
const char *
prphone(const char *num)
{
char *p;
const char *q;
int len;
static char pbuf[15];
/* don't touch anything if the user has their own formatting */
for (q = num; *q; ++q)
if (!isdigit(*q))
return(num);
len = q - 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);
}
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