4.3BSD-Reno/src/usr.bin/w/w.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)w.c 5.24 (Berkeley) 7/27/90";
#endif not lint
/*
* w - print system status (who and what)
*
* This program is similar to the systat command on Tenex/Tops 10/20
*
*/
#include <sys/param.h>
#include <utmp.h>
#include <sys/stat.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <machine/pte.h>
#include <sys/vm.h>
#include <sys/tty.h>
#include <nlist.h>
#include <kvm.h>
#include <ctype.h>
#include <paths.h>
#include <string.h>
#include <stdio.h>
char *program;
int ttywidth; /* width of tty */
int argwidth; /* width of tty */
int header = 1; /* true if -h flag: don't print heading */
int wcmd = 1; /* true if this is w(1), and not uptime(1) */
int nusers; /* number of users logged in now */
char * sel_user; /* login of particular user selected */
time_t now; /* the current time of day */
struct timeval boottime;
time_t uptime; /* time of last reboot & elapsed time since */
struct utmp utmp;
struct winsize ws;
int sortidle; /* sort bu idle time */
/*
* One of these per active utmp entry.
*/
struct entry {
struct entry *next;
struct utmp utmp;
dev_t tdev; /* dev_t of terminal */
int idle; /* idle time of terminal in minutes */
struct proc *proc; /* list of procs in foreground */
char *args; /* arg list of interesting process */
} *ep, *ehead = NULL, **nextp = &ehead;
struct nlist nl[] = {
{ "_boottime" },
#define X_BOOTTIME 0
#if defined(hp300)
{ "_cn_tty" },
#define X_CNTTY 1
#endif
{ "" },
};
#define USAGE "[ -hi ] [ user ]"
#define usage() fprintf(stderr, "usage: %s: %s\n", program, USAGE)
main(argc, argv)
char **argv;
{
register int i;
struct winsize win;
register struct proc *p;
struct eproc *e;
struct stat *stp, *ttystat();
FILE *ut;
char *cp;
int ch;
extern char *optarg;
extern int optind;
char *strsave();
program = argv[0];
/*
* are we w(1) or uptime(1)
*/
if ((cp = rindex(program, '/')) || *(cp = program) == '-')
cp++;
if (*cp == 'u')
wcmd = 0;
while ((ch = getopt(argc, argv, "hiflsuw")) != EOF)
switch((char)ch) {
case 'h':
header = 0;
break;
case 'i':
sortidle++;
break;
case 'f': case 'l': case 's': case 'u': case 'w':
error("[-flsuw] no longer supported");
usage();
exit(1);
case '?':
default:
usage();
exit(1);
}
argc -= optind;
argv += optind;
if (argc == 1) {
sel_user = argv[0];
argv++, argc--;
}
if (argc) {
usage();
exit(1);
}
if (header && kvm_nlist(nl) != 0) {
error("can't get namelist");
exit (1);
}
time(&now);
ut = fopen(_PATH_UTMP, "r");
while (fread(&utmp, sizeof(utmp), 1, ut)) {
if (utmp.ut_name[0] == '\0')
continue;
nusers++;
if (wcmd == 0 || (sel_user &&
strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
continue;
if ((ep = (struct entry *)
calloc(1, sizeof (struct entry))) == NULL) {
error("out of memory");
exit(1);
}
*nextp = ep;
nextp = &(ep->next);
bcopy(&utmp, &(ep->utmp), sizeof (struct utmp));
stp = ttystat(ep->utmp.ut_line);
ep->tdev = stp->st_rdev;
#if defined(hp300)
/*
* XXX If this is the console device, attempt to ascertain
* the true console device dev_t.
*/
if (ep->tdev == 0) {
static dev_t cn_dev;
if (nl[X_CNTTY].n_value) {
struct tty cn_tty, *cn_ttyp;
if (kvm_read(nl[X_CNTTY].n_value,
&cn_ttyp, sizeof (cn_ttyp)) > 0) {
(void)kvm_read(cn_ttyp, &cn_tty,
sizeof (cn_tty));
cn_dev = cn_tty.t_dev;
}
nl[X_CNTTY].n_value = 0;
}
ep->tdev = cn_dev;
}
#endif
ep->idle = ((now - stp->st_atime) + 30) / 60; /* secs->mins */
if (ep->idle < 0)
ep->idle = 0;
}
fclose(ut);
if (header || wcmd == 0) {
double avenrun[3];
int days, hrs, mins;
/*
* Print time of day
*/
fputs(attime(&now), stdout);
/*
* Print how long system has been up.
* (Found by looking for "boottime" in kernel)
*/
(void)kvm_read((off_t)nl[X_BOOTTIME].n_value, &boottime,
sizeof (boottime));
uptime = now - boottime.tv_sec;
uptime += 30;
days = uptime / (60*60*24);
uptime %= (60*60*24);
hrs = uptime / (60*60);
uptime %= (60*60);
mins = uptime / 60;
printf(" up");
if (days > 0)
printf(" %d day%s,", days, days>1?"s":"");
if (hrs > 0 && mins > 0) {
printf(" %2d:%02d,", hrs, mins);
} else {
if (hrs > 0)
printf(" %d hr%s,", hrs, hrs>1?"s":"");
if (mins > 0)
printf(" %d min%s,", mins, mins>1?"s":"");
}
/* Print number of users logged in to system */
printf(" %d user%s", nusers, nusers>1?"s":"");
/*
* Print 1, 5, and 15 minute load averages.
*/
printf(", load average:");
(void)getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
for (i = 0; i < (sizeof(avenrun)/sizeof(avenrun[0])); i++) {
if (i > 0)
printf(",");
printf(" %.2f", avenrun[i]);
}
printf("\n");
if (wcmd == 0) /* if uptime(1) then done */
exit(0);
#define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
#define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
printf(HEADER);
}
while ((p = kvm_nextproc()) != NULL) {
if (p->p_stat == SZOMB || (p->p_flag & SCTTY) == 0)
continue;
e = kvm_geteproc(p);
for (ep = ehead; ep != NULL; ep = ep->next) {
if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
/*
* Proc is in foreground of this terminal
*/
if (proc_compare(ep->proc, p))
ep->proc = p;
break;
}
}
}
if ((ioctl(1, TIOCGWINSZ, &ws) == -1 &&
ioctl(2, TIOCGWINSZ, &ws) == -1 &&
ioctl(0, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
ttywidth = 79;
else
ttywidth = ws.ws_col - 1;
argwidth = ttywidth - WUSED;
if (argwidth < 4)
argwidth = 8;
for (ep = ehead; ep != NULL; ep = ep->next) {
ep->args = strsave(kvm_getargs(ep->proc, kvm_getu(ep->proc)));
if (ep->args == NULL) {
error("out of memory");
exit(1);
}
}
/* sort by idle time */
if (sortidle && ehead != NULL) {
struct entry *from = ehead, *save;
ehead = NULL;
while (from != NULL) {
for (nextp = &ehead;
(*nextp) && from->idle >= (*nextp)->idle;
nextp = &(*nextp)->next)
;
save = from;
from = from->next;
save->next = *nextp;
*nextp = save;
}
}
for (ep = ehead; ep != NULL; ep = ep->next) {
printf("%-*.*s %-2.2s %-*.*s %s",
UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
strncmp(ep->utmp.ut_line, "tty", 3) == 0 ?
ep->utmp.ut_line+3 : ep->utmp.ut_line,
UT_HOSTSIZE, UT_HOSTSIZE, *ep->utmp.ut_host ?
ep->utmp.ut_host : "-",
attime(&ep->utmp.ut_time));
if (ep->idle >= 36 * 60)
printf(" %ddays ", (ep->idle + 12 * 60) / (24 * 60));
else
prttime(ep->idle, " ");
printf("%.*s\n", argwidth, ep->args);
}
}
struct stat *
ttystat(line)
{
static struct stat statbuf;
char ttybuf[sizeof (_PATH_DEV) + UT_LINESIZE + 1];
sprintf(ttybuf, "%s/%.*s", _PATH_DEV, UT_LINESIZE, line);
(void) stat(ttybuf, &statbuf);
return (&statbuf);
}
char *
strsave(cp)
char *cp;
{
register unsigned len;
register char *dp;
len = strlen(cp);
dp = (char *)calloc(len+1, sizeof (char));
(void) strcpy(dp, cp);
return (dp);
}
/*
* prttime prints a time in hours and minutes or minutes and seconds.
* The character string tail is printed at the end, obvious
* strings to pass are "", " ", or "am".
*/
prttime(tim, tail)
time_t tim;
char *tail;
{
if (tim >= 60) {
printf(" %2d:", tim/60);
tim %= 60;
printf("%02d", tim);
} else if (tim >= 0)
printf(" %2d", tim);
printf("%s", tail);
}
#include <varargs.h>
warning(va_alist)
va_dcl
{
char *fmt;
va_list ap;
fprintf(stderr, "%s: warning: ", program);
va_start(ap);
fmt = va_arg(ap, char *);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
error(va_alist)
va_dcl
{
char *fmt;
va_list ap;
fprintf(stderr, "%s: ", program);
va_start(ap);
fmt = va_arg(ap, char *);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
syserror(va_alist)
va_dcl
{
char *fmt;
va_list ap;
extern errno;
fprintf(stderr, "%s: ", program);
va_start(ap);
fmt = va_arg(ap, char *);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(errno));
}