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//===-- HostInfoPosix.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/lldb-python.h"
#include "lldb/Core/Log.h"
#include "lldb/Host/posix/HostInfoPosix.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
#include <grp.h>
#include <limits.h>
#include <mutex>
#include <netdb.h>
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
using namespace lldb_private;
size_t
HostInfoPosix::GetPageSize()
{
return ::getpagesize();
}
bool
HostInfoPosix::GetHostname(std::string &s)
{
char hostname[PATH_MAX];
hostname[sizeof(hostname) - 1] = '\0';
if (::gethostname(hostname, sizeof(hostname) - 1) == 0)
{
struct hostent *h = ::gethostbyname(hostname);
if (h)
s.assign(h->h_name);
else
s.assign(hostname);
return true;
}
return false;
}
#ifdef __ANDROID_NDK__
#include <android/api-level.h>
#endif
#if defined(__ANDROID_API__) && __ANDROID_API__ < 21
#define USE_GETPWUID
#endif
#ifdef USE_GETPWUID
static std::mutex s_getpwuid_lock;
#endif
const char *
HostInfoPosix::LookupUserName(uint32_t uid, std::string &user_name)
{
#ifdef USE_GETPWUID
// getpwuid_r is missing from android-9
// make getpwuid thread safe with a mutex
std::lock_guard<std::mutex> lock(s_getpwuid_lock);
struct passwd *user_info_ptr = ::getpwuid(uid);
if (user_info_ptr)
{
user_name.assign(user_info_ptr->pw_name);
return user_name.c_str();
}
#else
struct passwd user_info;
struct passwd *user_info_ptr = &user_info;
char user_buffer[PATH_MAX];
size_t user_buffer_size = sizeof(user_buffer);
if (::getpwuid_r(uid, &user_info, user_buffer, user_buffer_size, &user_info_ptr) == 0)
{
if (user_info_ptr)
{
user_name.assign(user_info_ptr->pw_name);
return user_name.c_str();
}
}
#endif
user_name.clear();
return nullptr;
}
const char *
HostInfoPosix::LookupGroupName(uint32_t gid, std::string &group_name)
{
#ifndef __ANDROID__
char group_buffer[PATH_MAX];
size_t group_buffer_size = sizeof(group_buffer);
struct group group_info;
struct group *group_info_ptr = &group_info;
// Try the threadsafe version first
if (::getgrgid_r(gid, &group_info, group_buffer, group_buffer_size, &group_info_ptr) == 0)
{
if (group_info_ptr)
{
group_name.assign(group_info_ptr->gr_name);
return group_name.c_str();
}
}
else
{
// The threadsafe version isn't currently working for me on darwin, but the non-threadsafe version
// is, so I am calling it below.
group_info_ptr = ::getgrgid(gid);
if (group_info_ptr)
{
group_name.assign(group_info_ptr->gr_name);
return group_name.c_str();
}
}
group_name.clear();
#else
assert(false && "getgrgid_r() not supported on Android");
#endif
return NULL;
}
uint32_t
HostInfoPosix::GetUserID()
{
return getuid();
}
uint32_t
HostInfoPosix::GetGroupID()
{
return getgid();
}
uint32_t
HostInfoPosix::GetEffectiveUserID()
{
return geteuid();
}
uint32_t
HostInfoPosix::GetEffectiveGroupID()
{
return getegid();
}
FileSpec
HostInfoPosix::GetDefaultShell()
{
return FileSpec("/bin/sh", false);
}
bool
HostInfoPosix::ComputeSupportExeDirectory(FileSpec &file_spec)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST);
FileSpec lldb_file_spec;
if (!GetLLDBPath(lldb::ePathTypeLLDBShlibDir, lldb_file_spec))
return false;
char raw_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
// Most Posix systems (e.g. Linux/*BSD) will attempt to replace a */lib with */bin as the base
// directory for helper exe programs. This will fail if the /lib and /bin directories are
// rooted in entirely different trees.
if (log)
log->Printf("HostInfoPosix::ComputeSupportExeDirectory() attempting to derive the bin path (ePathTypeSupportExecutableDir) from "
"this path: %s",
raw_path);
char *lib_pos = ::strstr(raw_path, "/lib");
if (lib_pos != nullptr)
{
// Now write in bin in place of lib.
::snprintf(lib_pos, PATH_MAX - (lib_pos - raw_path), "/bin");
if (log)
log->Printf("Host::%s() derived the bin path as: %s", __FUNCTION__, raw_path);
}
else
{
if (log)
log->Printf("Host::%s() failed to find /lib/liblldb within the shared lib path, bailing on bin path construction",
__FUNCTION__);
}
file_spec.GetDirectory().SetCString(raw_path);
return (bool)file_spec.GetDirectory();
}
bool
HostInfoPosix::ComputeHeaderDirectory(FileSpec &file_spec)
{
FileSpec temp_file("/opt/local/include/lldb", false);
file_spec.GetDirectory().SetCString(temp_file.GetPath().c_str());
return true;
}
bool
HostInfoPosix::ComputePythonDirectory(FileSpec &file_spec)
{
#ifndef LLDB_DISABLE_PYTHON
FileSpec lldb_file_spec;
if (!GetLLDBPath(lldb::ePathTypeLLDBShlibDir, lldb_file_spec))
return false;
char raw_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
llvm::SmallString<256> python_version_dir;
llvm::raw_svector_ostream os(python_version_dir);
os << "/python" << PY_MAJOR_VERSION << '.' << PY_MINOR_VERSION << "/site-packages";
os.flush();
// We may get our string truncated. Should we protect this with an assert?
::strncat(raw_path, python_version_dir.c_str(), sizeof(raw_path) - strlen(raw_path) - 1);
file_spec.GetDirectory().SetCString(raw_path);
return true;
#else
return false;
#endif
}
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