void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
struct pst_status pst;
std::memset(&pst, 0, sizeof(pst));
int res, pid = ::getpid();
// Acquire proc info, it contains file id of text file(executable)
res = ::pstat_getproc(&pst, sizeof(pst), 0, pid);
if (res < 0)
{
ec.assign(errno, boost::system::generic_category());
return;
}
pst_fid * fid_text = &pst.pst_fid_text;
char buffer[PATH_MAX];
// Now get pathname. According to man pstat_getpathname returns name from system cache,
// and it actually can be missing this information.
// In this case function will return 0, errno will be unchanged
res = ::pstat_getpathname(buffer, PATH_MAX, fid_text);
if (res < 0)
{
ec.assign(errno, boost::system::generic_category());
return;
}
path.assign(buffer, buffer + res);
}
void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
char buffer[PATH_MAX];
if (::realpath(getexecname(), buffer) == NULL)
ec.assign(errno, boost::system::generic_category());
else
path.assign(buffer);
}
void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
char buffer[PATH_MAX];
ssize_t len = ::readlink("/proc/self/exe", buffer, sizeof(buffer));
if (len == -1 || len == sizeof(buffer))
ec.assign(errno, boost::system::generic_category());
else
path.assign(buffer, buffer + len);
}
void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
int mib[4];
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PATHNAME;
mib[3] = -1;
char buffer[2048];
size_t len = sizeof(buffer);
if (sysctl(mib, 4, buffer, &len, NULL, 0) != 0)
ec.assign(errno, boost::system::generic_category());
else
path.assign(buffer, buffer + len);
}
void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
std::vector<wchar_t> buffer(MAX_PATH);
DWORD sz = ::GetModuleFileNameW(nullptr, buffer.data(), static_cast<DWORD>(buffer.size()));
while (buffer.size() == sz) // if buffer size is not enough, increase by 2
{
buffer.resize(buffer.size() * 2);
sz = ::GetModuleFileNameW(nullptr, buffer.data(), static_cast<DWORD>(buffer.size()));
}
if (!sz)
ec.assign(::GetLastError(), boost::system::system_category());
else
path.assign(buffer.data(), buffer.data() + sz);
}
void GetExePath(int argc, char *argv[], boost::filesystem::path & path, boost::system::error_code & ec)
{
char buffer[PATH_MAX];
uint32_t len = sizeof(buffer);
if (_NSGetExecutablePath(buffer, &len) != 0)
{
ec.assign(errno, boost::system::system_category());
}
else
{
// resolve symlinks, ., .. if possible
auto * canonicalPath = ::realpath(buffer, NULL);
if (canonicalPath != NULL)
{
strncpy(buffer, canonicalPath, len);
free(canonicalPath);
path.assign(buffer, buffer + len);
}
}
}
