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/* This is a trivial uptime program. I hereby release this program
* into the public domain. I disclaim any responsibility for this
* program --- use it at your own risk. (as if there were any.. ;-)
* -michaelkjohnson (johnsonm@sunsite.unc.edu)
*
* Modified by Larry Greenfield to give a more traditional output,
* count users, etc. (greenfie@gauss.rutgers.edu)
*
* Modified by mkj again to fix a few tiny buglies.
*
* Modified by J. Cowley to add printing the uptime message to a
* string (for top) and to optimize file handling. 19 Mar 1993.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <utmp.h>
#include <sys/ioctl.h>
#include "whattime.h"
#include "sysinfo.h"
static char buf[128];
static double av[3];
char *sprint_uptime(void) {
struct utmp *utmpstruct;
int upminutes, uphours, updays;
int pos;
struct tm *realtime;
time_t realseconds;
int numuser;
double uptime_secs, idle_secs;
/* first get the current time */
time(&realseconds);
realtime = localtime(&realseconds);
pos = sprintf(buf, " %02d:%02d:%02d ",
realtime->tm_hour, realtime->tm_min, realtime->tm_sec);
/* read and calculate the amount of uptime */
uptime(&uptime_secs, &idle_secs);
updays = (int) uptime_secs / (60*60*24);
strcat (buf, "up ");
pos += 3;
if (updays)
pos += sprintf(buf + pos, "%d day%s, ", updays, (updays != 1) ? "s" : "");
upminutes = (int) uptime_secs / 60;
uphours = upminutes / 60;
uphours = uphours % 24;
upminutes = upminutes % 60;
if(uphours)
pos += sprintf(buf + pos, "%2d:%02d, ", uphours, upminutes);
else
pos += sprintf(buf + pos, "%d min, ", upminutes);
/* count the number of users */
numuser = 0;
setutent();
while ((utmpstruct = getutent())) {
if ((utmpstruct->ut_type == USER_PROCESS) &&
(utmpstruct->ut_name[0] != '\0'))
numuser++;
}
endutent();
pos += sprintf(buf + pos, "%2d user%s, ", numuser, numuser == 1 ? "" : "s");
loadavg(&av[0], &av[1], &av[2]);
pos += sprintf(buf + pos, " load average: %.2f, %.2f, %.2f",
av[0], av[1], av[2]);
return buf;
}
void print_uptime(void) {
printf("%s\n", sprint_uptime());
}
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