98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
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* Copyright (c) 2004, 2006 Hyperic, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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