100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
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* This file is part of SIGAR.
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*
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* SIGAR is free software; you can redistribute it and/or modify
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* it under the terms version 2 of the GNU General Public License as
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* published by the Free Software Foundation. This program is distributed
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* in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA.
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*/
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#include "sigar.h"
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#include "sigar_private.h"
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#include "sigar_util.h"
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#include "sigar_os.h"
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#define my_pread(fd, ptr, type, offset) \
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(pread(fd, ptr, sizeof(type), offset) == sizeof(type))
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int sigar_proc_psinfo_get(sigar_t *sigar, sigar_pid_t pid)
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{
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int fd, retval = SIGAR_OK;
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char buffer[BUFSIZ];
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time_t timenow = time(NULL);
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if (sigar->pinfo == NULL) {
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sigar->pinfo = malloc(sizeof(*sigar->pinfo));
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}
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if (sigar->last_pid == pid) {
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if ((timenow - sigar->last_getprocs) < SIGAR_LAST_PROC_EXPIRE) {
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return SIGAR_OK;
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}
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}
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sigar->last_pid = pid;
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sigar->last_getprocs = timenow;
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(void)SIGAR_PROC_FILENAME(buffer, pid, "/psinfo");
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if ((fd = open(buffer, O_RDONLY)) < 0) {
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return ESRCH;
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}
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if (!my_pread(fd, sigar->pinfo, psinfo_t, 0)) {
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retval = errno;
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}
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close(fd);
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return retval;
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}
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int sigar_proc_usage_get(sigar_t *sigar, prusage_t *prusage, sigar_pid_t pid)
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{
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int fd, retval = SIGAR_OK;
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char buffer[BUFSIZ];
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(void)SIGAR_PROC_FILENAME(buffer, pid, "/usage");
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if ((fd = open(buffer, O_RDONLY)) < 0) {
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return ESRCH;
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}
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if (!my_pread(fd, prusage, prusage_t, 0)) {
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retval = errno;
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}
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close(fd);
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return retval;
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}
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int sigar_proc_status_get(sigar_t *sigar, pstatus_t *pstatus, sigar_pid_t pid)
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{
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int fd, retval = SIGAR_OK;
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char buffer[BUFSIZ];
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(void)SIGAR_PROC_FILENAME(buffer, pid, "/status");
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if ((fd = open(buffer, O_RDONLY)) < 0) {
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return ESRCH;
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}
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if (!my_pread(fd, pstatus, pstatus_t, 0)) {
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retval = errno;
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}
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close(fd);
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return retval;
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}
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