mikel@codas.UUCP (02/04/87)
This is an update to my earlier posting of "w" last year. This time
I have added the "hungry" feature. Use "hungry" to mark your tty,
saying that you are hungry. Use "w" to see who is hungry.
Disclaimer: I didn't come up with the hungry idea, it was on the net
a couple of weeks ago, but I didn't like the implementation.
#---cut here---
#
# To unbundle, sh this file
echo Makefile 1>&2
cat >Makefile <<'End of Makefile'
CFLAGS = -O
DFLAGS =
LFLAGS =
BINDIR = $$HOME/bin
PROGRM = w
OBJS = ch_time.o w.o
.c.o:
cc $(CFLAGS) $(DFLAGS) -c $*.c
$(PROGRM): $(OBJS)
cc $(CFLAGS) $(DFLAGS) -o $(PROGRM) $(OBJS) $(LFLAGS);
# @rm -f $(BINDIR)/$(PROGRM)
# @ln $(PROGRM) $(BINDIR)
# @chmod 755 $(PROGRM)
End of Makefile
echo ch_time.c 1>&2
cat >ch_time.c <<'End of ch_time.c'
#define NULL (0)
#define SECOND 1L
#define MINUTE 60L
#define HOUR (60L * 60L)
#define DAY (24L * 60L * 60L)
#define WEEK (7L * 24L * 60L * 60L)
#define BUFSIZE 1024
/*
* ch_time - format elapsed time into a character string.
*
* Mikel Manitius - 85-01-08 - (mikel@codas.att.com.uucp)
*
*/
char *malloc();
char *day[] =
{
"Sun", "Mon", "Tue",
"Wed", "Thu", "Fri",
"Sat", 0
};
char *mon[] =
{
"Jan", "Feb", "Mar", "Apr", "May",
"Jun", "Jul", "Aug", "Sep", "Oct",
"Nov", "Dec", 0
};
char *ch_time(sec)
int sec;
{
unsigned long hrs = 0L;
unsigned long days = 0L;
unsigned long mins = 0L;
unsigned long weeks = 0L;
char *buff;
buff = malloc(BUFSIZE);
if(buff == NULL)
return(NULL);
weeks = sec / WEEK;
sec -= WEEK * weeks;
days = sec / DAY;
sec -= DAY * days;
hrs = sec / HOUR;
sec -= HOUR * hrs;
mins = sec / MINUTE;
sec -= MINUTE * mins;
if(weeks)
sprintf(buff, "%d week%s, ", weeks, (weeks == 1) ? "" : "s");
if(days)
sprintf(buff, "%s%d day%s, ", (weeks) ? buff : "",
days, (days == 1L) ? "" : "s");
if(hrs || days || weeks)
sprintf(buff, "%s%d hour%s, ", (days || weeks) ? buff : "",
hrs, (hrs == 1L) ? "" : "s");
if(mins || hrs || days || weeks)
sprintf(buff, "%s%d minute%s, ",
(hrs || days || weeks) ? buff : "",
mins, (mins == 1L) ? "" : "s");
sprintf(buff, "%s%s%d second%s.",
(mins || hrs || days || weeks) ? buff : "",
(mins || hrs || days || weeks) ? "and " : "",
sec, (sec == 1L) ? "" : "s");
return(buff);
}
char *sh_time(sec)
int sec;
{
unsigned long hrs = 0L;
unsigned long days = 0L;
unsigned long mins = 0L;
char *buff;
buff = malloc(BUFSIZE);
if(buff == NULL)
return(NULL);
days = sec / DAY;
sec -= DAY * days;
hrs = sec / HOUR;
sec -= HOUR * hrs;
mins = sec / MINUTE;
sec -= MINUTE * mins;
sprintf(buff, "%d day%s + %02d:%02d:%02d",
days,
(days == 1) ? "" : "s",
hrs, mins, sec);
return(buff);
}
End of ch_time.c
echo hungry 1>&2
cat >hungry <<'End of hungry'
#
# hungry - tell people you are hungry.
#
tty=`tty`
case $1 in
y*|Y*)
chmod +x $tty
;;
n*|N*)
chmod -x $tty
;;
"")
if [ -x $tty ]
then
echo is y
else
echo is n
fi
;;
*)
echo "usage: $0 [y|n]"
;;
esac
End of hungry
echo w.c 1>&2
cat >w.c <<'End of w.c'
char *sccsid = "@(#)w.c Mikel Manitius AT&T-IS 86-03-14";
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <ctype.h>
#include <utmp.h>
#include <time.h>
#include <pwd.h>
/*
* w - who (what) where when (why?)
*
* Mikel Manitius - 86-03-14 - (mikel@codas.att.com.uucp)
*
*/
struct utmp ut;
struct stat st;
struct tm *tm;
struct tm *localtime();
struct passwd *pw;
struct passwd *getpwnam();
int sflag = 0;
char *pname;
char *ch_time();
char *sh_time();
extern char *day[];
extern char *mon[];
char *idle(device)
char *device;
{
int now;
int idle;
int min;
int sec;
char *pp;
pp = (char *) malloc(10);
if(pp == NULL)
return(NULL);
time(&now);
if(stat(device, &st) != 0) {
perror(device);
exit(-1);
}
idle = now - st.st_atime;
min = idle / (60 * 60);
sec = (idle - (min * 60 * 60)) / 60;
#ifdef SILENT
if(idle < 59)
sprintf(pp, " %2d ", idle);
else
#endif
sprintf(pp, "%2d:%02d", min, sec);
return(pp);
}
int done = 0;
main(argc, argv)
int argc;
char *argv[];
{
register fd;
int i;
int j;
pname = argv[0];
for(i=1;i < argc;i++)
switch(argv[i][0]) {
case '-':
for(j=1;argv[i][j] != '\0';j++)
switch(argv[i][j]) {
case 's':
sflag++;
break;
default:
usage();
break;
}
break;
default:
usage();
break;
}
fd = open(UTMP_FILE, 0);
if(fd < 0) {
perror(fd);
exit(-1);
}
while(read(fd, (char *)&ut, sizeof(ut)))
if(ut.ut_type == USER_PROCESS) {
char device[20];
if(!done) {
printf("login tty login@ idle root\n");
done = 1;
}
tm = localtime(&ut.ut_time);
printf("%-8s %-8s %2d:%02d ",
ut.ut_name, ut.ut_line,
tm->tm_hour, tm->tm_min);
sprintf(device, "/dev/%s", ut.ut_line);
printf("%-5s %5d", idle(device),
ut.ut_pid);
if(access(device, 2) != 0)
printf(" (messages off)\n");
else if(access(device, 1) == 0)
printf(" (hungry)\n");
else
doname(ut.ut_name);
} else if(ut.ut_type == BOOT_TIME)
uptime(ut.ut_time);
close(fd);
}
uptime(at)
int at;
{
int now;
char *up;
time(&now);
tm = localtime(&now);
if(sflag) {
up = sh_time(now - at);
printf(" %s %s %d %02d:%02d:%02d, up %s\n",
day[tm->tm_wday], mon[tm->tm_mon],
tm->tm_mday, tm->tm_hour,
tm->tm_min, tm->tm_sec, up);
} else {
up = ch_time(now - at);
printf(" %2d:%02d:%02d, up %s\n",
tm->tm_hour, tm->tm_min, tm->tm_sec, up);
}
}
doname(name)
char *name;
{
int i;
int len;
char fmt[10];
pw = getpwnam(name);
if(pw == NULL) {
putc('\n', stdout);
return(-1);
}
len = strlen(pw->pw_gecos) - 1;
for(i=0;i < len;i++)
if(isdigit(pw->pw_gecos[i]) || pw->pw_gecos[i] == ',') {
i--;
break;
}
sprintf(fmt, " %%.%ds\n", i+1);
printf(fmt, pw->pw_gecos);
}
usage()
{
fprintf(stderr, "usage: %s [ -s ]\n", pname);
exit(-1);
}
End of w.c
exit 0
--
Mikel Manitius @ AT&T-IS
mikel@codas.att.com.uucp