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