//===-- HostInfoNetBSD.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/netbsd/HostInfoNetBSD.h"

#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/utsname.h>
#include <unistd.h>
#include <pthread.h>
#include <inttypes.h>


using namespace lldb_private;

uint32_t
HostInfoNetBSD::GetMaxThreadNameLength()
{
    return PTHREAD_MAX_NAMELEN_NP;
}

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

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

    /* Accept versions like 7.99.21 and 6.1_STABLE */
    int status = ::sscanf(un.release, "%" PRIu32 ".%" PRIu32 ".%" PRIu32, &major, &minor, &update);
    switch(status) {
    case 0:
        return false;
    case 1:
        minor = 0;
        /* FALLTHROUGH */
    case 2:
        update = 0;
        /* FALLTHROUGH */
    case 3:
    default:
        return true;
    }
}

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

    if (::sysctl(mib, 2, &osrev, &osrev_len, NULL, 0) == 0)
    {
        ::snprintf(osrev_str, sizeof(osrev_str), "%-10.10d", osrev);
        s.assign(osrev_str);
        return true;
    }

    s.clear();
    return false;
}

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

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

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

    s.assign(un.version);

    return true;
}

FileSpec
HostInfoNetBSD::GetProgramFileSpec()
{
    static FileSpec g_program_filespec;

    if (!g_program_filespec)
    {
        ssize_t len;
        static char buf[PATH_MAX];
        char name[PATH_MAX];

        ::snprintf(name, PATH_MAX, "/proc/%d/exe", ::getpid());
        len = ::readlink(name, buf, PATH_MAX - 1);
        if (len != -1)
        {
            buf[len] = '\0';
            g_program_filespec.SetFile(buf, false);
        }
    }
    return g_program_filespec;
}