409 lines
10 KiB
C
409 lines
10 KiB
C
/*
|
|
* Copyright (c) 1987 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1987 Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)last.c 5.18 (Berkeley) 3/1/91";*/
|
|
static char rcsid[] = "$Id: last.c,v 1.2 1993/08/01 18:14:08 mycroft Exp $";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* last
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/file.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <utmp.h>
|
|
#include <stdio.h>
|
|
#include <paths.h>
|
|
|
|
#define SECDAY (24*60*60) /* seconds in a day */
|
|
#define NO 0 /* false/no */
|
|
#define YES 1 /* true/yes */
|
|
|
|
static struct utmp buf[1024]; /* utmp read buffer */
|
|
|
|
typedef struct arg {
|
|
char *name; /* argument */
|
|
#define HOST_TYPE -2
|
|
#define TTY_TYPE -3
|
|
#define USER_TYPE -4
|
|
int type; /* type of arg */
|
|
struct arg *next; /* linked list pointer */
|
|
} ARG;
|
|
ARG *arglist; /* head of linked list */
|
|
|
|
typedef struct ttytab {
|
|
long logout; /* log out time */
|
|
char tty[UT_LINESIZE + 1]; /* terminal name */
|
|
struct ttytab *next; /* linked list pointer */
|
|
} TTY;
|
|
TTY *ttylist; /* head of linked list */
|
|
|
|
static long currentout, /* current logout value */
|
|
maxrec; /* records to display */
|
|
static char *file = _PATH_WTMP; /* wtmp file */
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
extern int optind;
|
|
extern char *optarg;
|
|
int ch;
|
|
long atol();
|
|
char *p, *ttyconv();
|
|
|
|
maxrec = -1;
|
|
while ((ch = getopt(argc, argv, "0123456789f:h:t:")) != EOF)
|
|
switch((char)ch) {
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
/*
|
|
* kludge: last was originally designed to take
|
|
* a number after a dash.
|
|
*/
|
|
if (maxrec == -1) {
|
|
p = argv[optind - 1];
|
|
if (p[0] == '-' && p[1] == ch && !p[2])
|
|
maxrec = atol(++p);
|
|
else
|
|
maxrec = atol(argv[optind] + 1);
|
|
if (!maxrec)
|
|
exit(0);
|
|
}
|
|
break;
|
|
case 'f':
|
|
file = optarg;
|
|
break;
|
|
case 'h':
|
|
hostconv(optarg);
|
|
addarg(HOST_TYPE, optarg);
|
|
break;
|
|
case 't':
|
|
addarg(TTY_TYPE, ttyconv(optarg));
|
|
break;
|
|
case '?':
|
|
default:
|
|
fputs("usage: last [-#] [-f file] [-t tty] [-h hostname] [user ...]\n", stderr);
|
|
exit(1);
|
|
}
|
|
|
|
if (argc) {
|
|
setlinebuf(stdout);
|
|
for (argv += optind; *argv; ++argv) {
|
|
#define COMPATIBILITY
|
|
#ifdef COMPATIBILITY
|
|
/* code to allow "last p5" to work */
|
|
addarg(TTY_TYPE, ttyconv(*argv));
|
|
#endif
|
|
addarg(USER_TYPE, *argv);
|
|
}
|
|
}
|
|
wtmp();
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* wtmp --
|
|
* read through the wtmp file
|
|
*/
|
|
wtmp()
|
|
{
|
|
register struct utmp *bp; /* current structure */
|
|
register TTY *T; /* tty list entry */
|
|
struct stat stb; /* stat of file for size */
|
|
long bl, delta, /* time difference */
|
|
lseek(), time();
|
|
int bytes, wfd;
|
|
char *ct, *crmsg,
|
|
*asctime(), *ctime(), *strcpy();
|
|
TTY *addtty();
|
|
void onintr();
|
|
|
|
if ((wfd = open(file, O_RDONLY, 0)) < 0 || fstat(wfd, &stb) == -1) {
|
|
perror(file);
|
|
exit(1);
|
|
}
|
|
bl = (stb.st_size + sizeof(buf) - 1) / sizeof(buf);
|
|
|
|
(void)time(&buf[0].ut_time);
|
|
(void)signal(SIGINT, onintr);
|
|
(void)signal(SIGQUIT, onintr);
|
|
|
|
while (--bl >= 0) {
|
|
if (lseek(wfd, (long)(bl * sizeof(buf)), L_SET) == -1 ||
|
|
(bytes = read(wfd, (char *)buf, sizeof(buf))) == -1) {
|
|
fprintf(stderr, "last: %s: ", file);
|
|
perror((char *)NULL);
|
|
exit(1);
|
|
}
|
|
for (bp = &buf[bytes / sizeof(buf[0]) - 1]; bp >= buf; --bp) {
|
|
/*
|
|
* if the terminal line is '~', the machine stopped.
|
|
* see utmp(5) for more info.
|
|
*/
|
|
if (bp->ut_line[0] == '~' && !bp->ut_line[1]) {
|
|
/* everybody just logged out */
|
|
for (T = ttylist; T; T = T->next)
|
|
T->logout = -bp->ut_time;
|
|
currentout = -bp->ut_time;
|
|
crmsg = strncmp(bp->ut_name, "shutdown",
|
|
UT_NAMESIZE) ? "crash" : "shutdown";
|
|
if (want(bp, NO)) {
|
|
ct = ctime(&bp->ut_time);
|
|
printf("%-*.*s %-*.*s %-*.*s %10.10s %5.5s \n", UT_NAMESIZE, UT_NAMESIZE, bp->ut_name, UT_LINESIZE, UT_LINESIZE, bp->ut_line, UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host, ct, ct + 11);
|
|
if (maxrec != -1 && !--maxrec)
|
|
return;
|
|
}
|
|
continue;
|
|
}
|
|
/*
|
|
* if the line is '{' or '|', date got set; see
|
|
* utmp(5) for more info.
|
|
*/
|
|
if ((bp->ut_line[0] == '{' || bp->ut_line[0] == '|')
|
|
&& !bp->ut_line[1]) {
|
|
if (want(bp, NO)) {
|
|
ct = ctime(&bp->ut_time);
|
|
printf("%-*.*s %-*.*s %-*.*s %10.10s %5.5s \n", UT_NAMESIZE, UT_NAMESIZE, bp->ut_name, UT_LINESIZE, UT_LINESIZE, bp->ut_line, UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host, ct, ct + 11);
|
|
if (maxrec && !--maxrec)
|
|
return;
|
|
}
|
|
continue;
|
|
}
|
|
/* find associated tty */
|
|
for (T = ttylist;; T = T->next) {
|
|
if (!T) {
|
|
/* add new one */
|
|
T = addtty(bp->ut_line);
|
|
break;
|
|
}
|
|
if (!strncmp(T->tty, bp->ut_line, UT_LINESIZE))
|
|
break;
|
|
}
|
|
if (bp->ut_name[0] && want(bp, YES)) {
|
|
ct = ctime(&bp->ut_time);
|
|
printf("%-*.*s %-*.*s %-*.*s %10.10s %5.5s ", UT_NAMESIZE, UT_NAMESIZE, bp->ut_name, UT_LINESIZE, UT_LINESIZE, bp->ut_line, UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host, ct, ct + 11);
|
|
if (!T->logout)
|
|
puts(" still logged in");
|
|
else {
|
|
if (T->logout < 0) {
|
|
T->logout = -T->logout;
|
|
printf("- %s", crmsg);
|
|
}
|
|
else
|
|
printf("- %5.5s", ctime(&T->logout)+11);
|
|
delta = T->logout - bp->ut_time;
|
|
if (delta < SECDAY)
|
|
printf(" (%5.5s)\n", asctime(gmtime(&delta))+11);
|
|
else
|
|
printf(" (%ld+%5.5s)\n", delta / SECDAY, asctime(gmtime(&delta))+11);
|
|
}
|
|
if (maxrec != -1 && !--maxrec)
|
|
return;
|
|
}
|
|
T->logout = bp->ut_time;
|
|
}
|
|
}
|
|
ct = ctime(&buf[0].ut_time);
|
|
printf("\nwtmp begins %10.10s %5.5s \n", ct, ct + 11);
|
|
}
|
|
|
|
/*
|
|
* want --
|
|
* see if want this entry
|
|
*/
|
|
want(bp, check)
|
|
register struct utmp *bp;
|
|
int check;
|
|
{
|
|
register ARG *step;
|
|
|
|
if (check)
|
|
/*
|
|
* when uucp and ftp log in over a network, the entry in
|
|
* the utmp file is the name plus their process id. See
|
|
* etc/ftpd.c and usr.bin/uucp/uucpd.c for more information.
|
|
*/
|
|
if (!strncmp(bp->ut_line, "ftp", sizeof("ftp") - 1))
|
|
bp->ut_line[3] = '\0';
|
|
else if (!strncmp(bp->ut_line, "uucp", sizeof("uucp") - 1))
|
|
bp->ut_line[4] = '\0';
|
|
if (!arglist)
|
|
return(YES);
|
|
|
|
for (step = arglist; step; step = step->next)
|
|
switch(step->type) {
|
|
case HOST_TYPE:
|
|
if (!strncasecmp(step->name, bp->ut_host, UT_HOSTSIZE))
|
|
return(YES);
|
|
break;
|
|
case TTY_TYPE:
|
|
if (!strncmp(step->name, bp->ut_line, UT_LINESIZE))
|
|
return(YES);
|
|
break;
|
|
case USER_TYPE:
|
|
if (!strncmp(step->name, bp->ut_name, UT_NAMESIZE))
|
|
return(YES);
|
|
break;
|
|
}
|
|
return(NO);
|
|
}
|
|
|
|
/*
|
|
* addarg --
|
|
* add an entry to a linked list of arguments
|
|
*/
|
|
addarg(type, arg)
|
|
int type;
|
|
char *arg;
|
|
{
|
|
register ARG *cur;
|
|
char *malloc();
|
|
|
|
if (!(cur = (ARG *)malloc((u_int)sizeof(ARG)))) {
|
|
fputs("last: malloc failure.\n", stderr);
|
|
exit(1);
|
|
}
|
|
cur->next = arglist;
|
|
cur->type = type;
|
|
cur->name = arg;
|
|
arglist = cur;
|
|
}
|
|
|
|
/*
|
|
* addtty --
|
|
* add an entry to a linked list of ttys
|
|
*/
|
|
TTY *
|
|
addtty(ttyname)
|
|
char *ttyname;
|
|
{
|
|
register TTY *cur;
|
|
char *malloc();
|
|
|
|
if (!(cur = (TTY *)malloc((u_int)sizeof(TTY)))) {
|
|
fputs("last: malloc failure.\n", stderr);
|
|
exit(1);
|
|
}
|
|
cur->next = ttylist;
|
|
cur->logout = currentout;
|
|
bcopy(ttyname, cur->tty, UT_LINESIZE);
|
|
return(ttylist = cur);
|
|
}
|
|
|
|
/*
|
|
* hostconv --
|
|
* convert the hostname to search pattern; if the supplied host name
|
|
* has a domain attached that is the same as the current domain, rip
|
|
* off the domain suffix since that's what login(1) does.
|
|
*/
|
|
hostconv(arg)
|
|
char *arg;
|
|
{
|
|
static int first = 1;
|
|
static char *hostdot, name[MAXHOSTNAMELEN];
|
|
char *argdot, *index();
|
|
|
|
if (!(argdot = index(arg, '.')))
|
|
return;
|
|
if (first) {
|
|
first = 0;
|
|
if (gethostname(name, sizeof(name))) {
|
|
perror("last: gethostname");
|
|
exit(1);
|
|
}
|
|
hostdot = index(name, '.');
|
|
}
|
|
if (hostdot && !strcasecmp(hostdot, argdot))
|
|
*argdot = '\0';
|
|
}
|
|
|
|
/*
|
|
* ttyconv --
|
|
* convert tty to correct name.
|
|
*/
|
|
char *
|
|
ttyconv(arg)
|
|
char *arg;
|
|
{
|
|
char *mval, *malloc(), *strcpy();
|
|
|
|
/*
|
|
* kludge -- we assume that all tty's end with
|
|
* a two character suffix.
|
|
*/
|
|
if (strlen(arg) == 2) {
|
|
/* either 6 for "ttyxx" or 8 for "console" */
|
|
if (!(mval = malloc((u_int)8))) {
|
|
fputs("last: malloc failure.\n", stderr);
|
|
exit(1);
|
|
}
|
|
if (!strcmp(arg, "co"))
|
|
(void)strcpy(mval, "console");
|
|
else {
|
|
(void)strcpy(mval, "tty");
|
|
(void)strcpy(mval + 3, arg);
|
|
}
|
|
return(mval);
|
|
}
|
|
if (!strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1))
|
|
return(arg + 5);
|
|
return(arg);
|
|
}
|
|
|
|
/*
|
|
* onintr --
|
|
* on interrupt, we inform the user how far we've gotten
|
|
*/
|
|
void
|
|
onintr(signo)
|
|
int signo;
|
|
{
|
|
char *ct, *ctime();
|
|
|
|
ct = ctime(&buf[0].ut_time);
|
|
printf("\ninterrupted %10.10s %5.5s \n", ct, ct + 11);
|
|
if (signo == SIGINT)
|
|
exit(1);
|
|
(void)fflush(stdout); /* fix required for rsh */
|
|
}
|