help!!!! getting system information

QNX Newsgroups (Archives) qnx.rtos
1

I need to know how to get system information, only function i can find is
devctl(), they had a nice qnx_info() in qnx4, but migration kit doesnt tell
you how to write the equivalent functions

  1. total memory , available memory left.

  2. video card information.

  3. operating system version.

  4. cpu’s information.

2

Ran Zhang wrote:

  1. total memory , available memory left.

I think total memory you have to walk the syspage adding up ram
sections. Bascially something like this:

static uint64_t get_total_mem(void) {
char *str = SYSPAGE_ENTRY(strings)->data;
struct asinfo_entry *as = SYSPAGE_ENTRY(asinfo);
uint64_t total = 0;
unsigned num;

for(num = _syspage_ptr->asinfo.entry_size / sizeof(*as);
num > 0; --num) {
if(strcmp(&str[as->name], “ram”) == 0) {
total += as->end - as->start + 1;
}
++as;
}
return total;
}

Free memory is available as the size of “/proc”, so do a
“stat(”/proc", &st);" and look at st.st_size (bytes). Or
“ls -ld /proc” from the shell.

  1. operating system version.

#include <sys/utsname.h>
uname();

-or-

#include <confname.h>
sysconf(); // _CS_RELEASE, _CS_VERSION, etc

Or from the shell, the “uname” or “getconf” utilities.

  1. cpu’s information.

Again I think this is another walk-the-syspage thing, looking
at the “cpu” section. Refer <sys/syspage.h>

struct cpuinfo_entry *cpu = SYSPAGE_ENTRY(cpuinfo);

This will be an array based on ‘numcpu’ field in root of syspage.

3

Actually you should be looking for “sysram” since that is what is used for
ram allocations.

Cheers,

Colin

John Garvey wrote:

Ran Zhang wrote:

  1. total memory , available memory left.

I think total memory you have to walk the syspage adding up ram
sections. Bascially something like this:

static uint64_t get_total_mem(void) {
char *str = SYSPAGE_ENTRY(strings)->data;
struct asinfo_entry *as = SYSPAGE_ENTRY(asinfo);
uint64_t total = 0;
unsigned num;

for(num = _syspage_ptr->asinfo.entry_size / sizeof(*as);
num > 0; --num) {
if(strcmp(&str[as->name], “ram”) == 0) {
total += as->end - as->start + 1;
}
++as;
}
return total;
}

Free memory is available as the size of “/proc”, so do a
“stat(”/proc", &st);" and look at st.st_size (bytes). Or
“ls -ld /proc” from the shell.

  1. operating system version.

#include <sys/utsname.h
uname();

-or-

#include <confname.h
sysconf(); // _CS_RELEASE, _CS_VERSION, etc

Or from the shell, the “uname” or “getconf” utilities.

  1. cpu’s information.

Again I think this is another walk-the-syspage thing, looking
at the “cpu” section. Refer <sys/syspage.h

struct cpuinfo_entry *cpu = SYSPAGE_ENTRY(cpuinfo);

This will be an array based on ‘numcpu’ field in root of syspage.