/* * Copyright (c) Red Hat 2014. * Copyright (c) International Business Machines Corp., 2002 * This code contributed by Mike Mason * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. */ #include #include "pmapi.h" #include "pmda.h" #include "indom.h" #include "proc_uptime.h" int refresh_proc_uptime(proc_uptime_t *proc_uptime) { char buf[MAXPATHLEN]; int fd, n; float uptime = 0.0, idletime = 0.0; memset(proc_uptime, 0, sizeof(proc_uptime_t)); snprintf(buf, sizeof(buf), "%s/proc/uptime", linux_statspath); if ((fd = open(buf, O_RDONLY)) < 0) return -oserror(); n = read(fd, buf, sizeof(buf)); close(fd); if (n < 0) return -oserror(); else if (n > 0) n--; buf[n] = '\0'; sscanf((const char *)buf, "%f %f", &uptime, &idletime); proc_uptime->uptime = (unsigned long) uptime; proc_uptime->idletime = (unsigned long) idletime; return 0; }