//===-- HostInfoFreeBSD.cpp -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Host/freebsd/HostInfoFreeBSD.h"

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/utsname.h>

using namespace lldb_private;

uint32_t
HostInfoFreeBSD::GetMaxThreadNameLength()
{
    return 16;
}

bool
HostInfoFreeBSD::GetOSVersion(uint32_t &major, uint32_t &minor, uint32_t &update)
{
    struct utsname un;

    ::memset(&un, 0, sizeof(utsname));
    if (uname(&un) < 0)
        return false;

    int status = sscanf(un.release, "%u.%u", &major, &minor);
    return status == 2;
}

bool
HostInfoFreeBSD::GetOSBuildString(std::string &s)
{
    int mib[2] = {CTL_KERN, KERN_OSREV};
    char osrev_str[12];
    uint32_t osrev = 0;
    size_t osrev_len = sizeof(osrev);

    if (::sysctl(mib, 2, &osrev, &osrev_len, NULL, 0) == 0)
    {
        ::snprintf(osrev_str, sizeof(osrev_str), "%-8.8u", osrev);
        s.assign(osrev_str);
        return true;
    }

    s.clear();
    return false;
}

bool
HostInfoFreeBSD::GetOSKernelDescription(std::string &s)
{
    struct utsname un;

    ::memset(&un, 0, sizeof(utsname));
    s.clear();

    if (uname(&un) < 0)
        return false;

    s.assign(un.version);

    return true;
}

FileSpec
HostInfoFreeBSD::GetProgramFileSpec()
{
    static FileSpec g_program_filespec;
    if (!g_program_filespec)
    {
        int exe_path_mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, getpid()};
        size_t exe_path_size;
        if (sysctl(exe_path_mib, 4, NULL, &exe_path_size, NULL, 0) == 0)
        {
            char *exe_path = new char[exe_path_size];
            if (sysctl(exe_path_mib, 4, exe_path, &exe_path_size, NULL, 0) == 0)
                g_program_filespec.SetFile(exe_path, false);
            delete[] exe_path;
        }
    }
    return g_program_filespec;
}