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//
// Copyright (C) 2014 Ben Key
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <stdio.h>
#include <stdlib.h>
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include "executable_path.h"
#if defined(_WIN32)
# include <Windows.h>
std::string executable_path(const char *argv0)
{
char buf[1024] = {0};
DWORD ret = GetModuleFileNameA(NULL, buf, sizeof(buf));
if (ret == 0 || ret == sizeof(buf))
{
return executable_path_fallback(argv0);
}
return buf;
}
#elif defined(__APPLE__)
# include <mach-o/dyld.h>
std::string executable_path(const char *argv0)
{
char buf[1024] = {0};
uint32_t size = sizeof(buf);
int ret = _NSGetExecutablePath(buf, &size);
if (0 != ret)
{
return executable_path_fallback(argv0);
}
boost::filesystem::path full_path(
boost::filesystem::system_complete(
boost::filesystem::path(buf).normalize()));
return full_path.string();
}
#elif defined(sun) || defined(__sun)
# include <stdlib.h>
std::string executable_path(const char *argv0)
{
return getexecname();
}
#elif defined(__FreeBSD__)
# include <sys/sysctl.h>
std::string executable_path(const char *argv0)
{
int mib[4] = {0};
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PATHNAME;
mib[3] = -1;
char buf[1024] = {0};
size_t size = sizeof(buf);
sysctl(mib, 4, buf, &size, NULL, 0);
if (size == 0 || size == sizeof(buf))
{
return executable_path_fallback(argv0);
}
std::string path(buf, size);
boost::filesystem::path full_path(
boost::filesystem::system_complete(
boost::filesystem::path(path).normalize()));
return full_path.string();
}
#elif defined(__linux__)
# include <unistd.h>
std::string executable_path(const char *argv0)
{
char buf[1024] = {0};
ssize_t size = readlink("/proc/self/exe", buf, sizeof(buf));
if (size == 0 || size == sizeof(buf))
{
return executable_path_fallback(argv0);
}
std::string path(buf, size);
boost::filesystem::path full_path(
boost::filesystem::system_complete(
boost::filesystem::path(path).normalize()));
return full_path.string();
}
#else
std::string executable_path(const char *argv0)
{
return executable_path_fallback(argv0);
}
#endif
std::string executable_path_fallback(const char *argv0)
{
if (0 == argv0 || 0 == argv0[0])
{
return "";
}
boost::filesystem::path full_path(
boost::filesystem::system_complete(
boost::filesystem::path(argv0)));
return full_path.string();
}
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