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Aminet 7
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Aminet 7 - August 1995.iso
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comm
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tcp
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amitcpfinger.lha
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finger
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util.c
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C/C++ Source or Header
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1993-08-10
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335 lines
/*
* 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[] = "@(#)util.c 5.14 (Berkeley) 1/17/91";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <paths.h>
#include "finger.h"
find_idle_and_ttywrite(w)
register WHERE *w;
{
extern time_t now;
extern int errno;
struct stat sb;
char *strerror();
(void)sprintf(tbuf, "%s/%s", _PATH_DEV, w->tty);
if (stat(tbuf, &sb) < 0) {
(void)fprintf(stderr,
"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);
}
userinfo(pn, pw)
register PERSON *pn;
register struct passwd *pw;
{
register char *p, *t;
char *bp, name[1024];
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);
/* why do we skip asterisks!?!? */
(void)strcpy(bp = tbuf, pw->pw_gecos);
if (*bp == '*')
++bp;
/* ampersands get replaced by the login name */
if (!(p = strsep(&bp, ",")))
return;
for (t = name; *t = *p; ++p)
if (*t == '&') {
(void)strcpy(t, pw->pw_name);
if (islower(*t))
*t = toupper(*t);
while (*++t);
}
else
++t;
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;
}
match(pw, user)
struct passwd *pw;
char *user;
{
register char *p, *t;
char name[1024];
/* why do we skip asterisks!?!? */
(void)strcpy(p = tbuf, pw->pw_gecos);
if (*p == '*')
++p;
/* ampersands get replaced by the login name */
if (!(p = strtok(p, ",")))
return(0);
for (t = name; *t = *p; ++p)
if (*t == '&') {
(void)strcpy(t, pw->pw_name);
while (*++t);
}
else
++t;
for (t = name; p = strtok(t, "\t "); t = (char *)NULL)
if (!strcasecmp(p, user))
return(1);
return(0);
}
enter_lastlog(pn)
register PERSON *pn;
{
register WHERE *w;
static int opened, fd;
struct lastlog ll;
char doit = 0;
off_t lseek();
/* 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, (long)pn->uid * sizeof(ll), L_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] = NULL;
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;
}
}
enter_where(ut, pn)
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 = (time_t)ut->ut_time;
find_idle_and_ttywrite(w);
}
PERSON *
enter_person(pw)
register 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(name)
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);
}
hash(name)
register 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()
{
PERSON *p;
if ((p = (PERSON *)malloc((u_int) sizeof(PERSON))) == NULL) {
(void)fprintf(stderr, "finger: out of space.\n");
exit(1);
}
return(p);
}
WHERE *
walloc(pn)
register PERSON *pn;
{
register WHERE *w;
if ((w = (WHERE *)malloc((u_int) sizeof(WHERE))) == NULL) {
(void)fprintf(stderr, "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);
}
char *
prphone(num)
char *num;
{
register 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(*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 */
*p++ = 'x';
*p++ = *num++;
break;
default:
return(num);
}
*p++ = '-';
*p++ = *num++;
*p++ = *num++;
*p++ = *num++;
*p++ = *num++;
*p = '\0';
return(pbuf);
}