/* * Copyright (C) [2004, 2005, 2006], Hyperic, Inc. * This file is part of SIGAR. * * SIGAR is free software; you can redistribute it and/or modify * it under the terms version 2 of the GNU General Public License as * published by the Free Software Foundation. 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA. */ #include "sigar.h" #include "sigar_private.h" #include "sigar_util.h" #include "sigar_os.h" #define my_pread(fd, ptr, type, offset) \ (pread(fd, ptr, sizeof(type), offset) == sizeof(type)) int sigar_proc_psinfo_get(sigar_t *sigar, sigar_pid_t pid) { int fd, retval = SIGAR_OK; char buffer[BUFSIZ]; time_t timenow = time(NULL); if (sigar->pinfo == NULL) { sigar->pinfo = malloc(sizeof(*sigar->pinfo)); } if (sigar->last_pid == pid) { if ((timenow - sigar->last_getprocs) < SIGAR_LAST_PROC_EXPIRE) { return SIGAR_OK; } } sigar->last_pid = pid; sigar->last_getprocs = timenow; (void)SIGAR_PROC_FILENAME(buffer, pid, "/psinfo"); if ((fd = open(buffer, O_RDONLY)) < 0) { return ESRCH; } if (!my_pread(fd, sigar->pinfo, psinfo_t, 0)) { retval = errno; } close(fd); return retval; } int sigar_proc_usage_get(sigar_t *sigar, prusage_t *prusage, sigar_pid_t pid) { int fd, retval = SIGAR_OK; char buffer[BUFSIZ]; (void)SIGAR_PROC_FILENAME(buffer, pid, "/usage"); if ((fd = open(buffer, O_RDONLY)) < 0) { return ESRCH; } if (!my_pread(fd, prusage, prusage_t, 0)) { retval = errno; } close(fd); return retval; } int sigar_proc_status_get(sigar_t *sigar, pstatus_t *pstatus, sigar_pid_t pid) { int fd, retval = SIGAR_OK; char buffer[BUFSIZ]; (void)SIGAR_PROC_FILENAME(buffer, pid, "/status"); if ((fd = open(buffer, O_RDONLY)) < 0) { return ESRCH; } if (!my_pread(fd, pstatus, pstatus_t, 0)) { retval = errno; } close(fd); return retval; }