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/*
* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include "opal/constants.h"
/* This component will only be compiled on Linux, where we are
guaranteed to have <unistd.h> and friends */
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <sys/param.h> /* for HZ to convert jiffies to actual time */
#include "opal/mca/base/mca_base_param.h"
#include "opal/dss/dss_types.h"
#include "opal/util/printf.h"
#include "sysinfo_linux.h"
/*
* Module functions
*/
static int linux_module_init(void);
static int query(char **keys, opal_list_t *values);
static int linux_module_fini(void);
/*
* Linux sysinfo module
*/
const opal_sysinfo_base_module_t opal_sysinfo_linux_module = {
linux_module_init,
query,
linux_module_fini
};
/* Local functions */
static char *local_getline(FILE *fp);
static char *local_stripper(char *data);
/* Local data */
static char *cpu_type=NULL;
static char *cpu_model=NULL;
static int num_cpus=0;
static int64_t mem_size=0;
static char input[256];
static int linux_module_init(void)
{
FILE *fp;
char *data, *value, *ptr;
/* see if we can open the cpuinfo file */
if (NULL == (fp = fopen("/proc/cpuinfo", "r"))) {
/* can't access this file - most likely, this means we
* aren't really on a supported system, or the proc no
* longer exists. Just return an error
*/
return OPAL_ERR_NOT_SUPPORTED;
}
/* read the file one line at a time */
while (NULL != (data = local_getline(fp))) {
if (NULL == (value = local_stripper(data))) {
/* cannot process */
continue;
}
if (NULL == cpu_type && 0 == strcmp(data, "vendor_id")) {
cpu_type = strdup(value);
continue;
}
if (NULL == cpu_model && 0 == strcmp(data, "model name")) {
cpu_model = strdup(value);
}
if (0 == strcmp(data, "processor")) {
/* increment the num_cpus */
++num_cpus;
}
}
fclose(fp);
/* see if we can open the meminfo file */
if (NULL == (fp = fopen("/proc/meminfo", "r"))) {
/* ignore this */
return OPAL_SUCCESS;
}
/* read the file one line at a time */
while (NULL != (data = local_getline(fp))) {
if (NULL == (value = local_stripper(data))) {
/* cannot process */
continue;
}
if (0 == strcmp(data, "MemTotal")) {
/* find units */
ptr = &value[strlen(value)-2];
value[strlen(value)-3] = '\0';
/* compute base value */
mem_size = strtol(value, NULL, 10);
/* get the unit multiplier */
if (0 == strcmp(ptr, "kB")) {
mem_size = mem_size / 1024;
}
continue;
}
}
fclose(fp);
return OPAL_SUCCESS;
}
static int linux_module_fini(void)
{
return OPAL_SUCCESS;
}
static int query(char **keys, opal_list_t *values)
{
int i;
opal_sysinfo_value_t *data;
/* cycle through the requested keys */
for (i=0; NULL != keys[i]; i++) {
if (0 == strcmp(keys[i], OPAL_SYSINFO_CPU_TYPE) &&
NULL != cpu_type) {
data = OBJ_NEW(opal_sysinfo_value_t);
data->key = strdup(OPAL_SYSINFO_CPU_TYPE);
data->type = OPAL_STRING;
data->data.str = strdup(cpu_type);
opal_list_append(values, &data->super);
continue;
}
if (0 == strcmp(keys[i], OPAL_SYSINFO_CPU_MODEL) &&
NULL != cpu_model) {
data = OBJ_NEW(opal_sysinfo_value_t);
data->key = strdup(OPAL_SYSINFO_CPU_MODEL);
data->type = OPAL_STRING;
data->data.str = strdup(cpu_model);
opal_list_append(values, &data->super);
continue;
}
if (0 == strcmp(keys[i], OPAL_SYSINFO_NUM_CPUS) &&
num_cpus > 0) {
data = OBJ_NEW(opal_sysinfo_value_t);
data->key = strdup(OPAL_SYSINFO_NUM_CPUS);
data->type = OPAL_INT64;
data->data.i64 = (int64_t)num_cpus;
opal_list_append(values, &data->super);
continue;
}
if (0 == strcmp(keys[i], OPAL_SYSINFO_MEM_SIZE) &&
mem_size > 0) {
data = OBJ_NEW(opal_sysinfo_value_t);
data->key = strdup(OPAL_SYSINFO_MEM_SIZE);
data->type = OPAL_INT64;
data->data.i64 = mem_size;
opal_list_append(values, &data->super);
continue;
}
}
return OPAL_SUCCESS;
}
static char *local_getline(FILE *fp)
{
char *ret;
ret = fgets(input, 256, fp);
if (NULL != ret) {
input[strlen(input)-1] = '\0'; /* remove newline */
return input;
}
return NULL;
}
static char *local_stripper(char *data)
{
char *ptr, *end, *enddata;
int len = strlen(data);
/* find the colon */
if (NULL == (end = strchr(data, ':'))) {
return NULL;
}
ptr = end;
--end;
/* working backwards, look for first non-whitespace */
while (end != data && !isalnum(*end)) {
--end;
}
++end;
*end = '\0';
/* now look for value */
ptr++;
enddata = &(data[len-1]);
while (ptr != enddata && !isalnum(*ptr)) {
++ptr;
}
return ptr;
}
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