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#include <utils.h>
#include <exceptions.h>
#include <cstring>
extern "C"
{
#include <unistd.h>
#include <spawn.h>
}
TermSize::TermSize()
{
term_size.ws_col = 0;
term_size.ws_row = 0;
term_size.ws_xpixel = 0;
term_size.ws_ypixel = 0;
}
bool TermSize::probe_terminal_size()
{
valid = (ioctl(1, TIOCGWINSZ, &term_size) == 0);
return valid;
}
bool TermSize::is_valid() const
{
return valid;
}
uint16_t TermSize::get_size_x() const
{
return static_cast<uint16_t> (term_size.ws_col);
}
uint16_t TermSize::get_size_y() const
{
return static_cast<uint16_t> (term_size.ws_row);
}
namespace posix
{
const size_t PIPE_READ_SIDE = 0;
const size_t PIPE_WRITE_SIDE = 1;
void close_fd(int& fd) noexcept
{
if (fd != -1)
{
int rc = 0;
do
{
errno = 0;
rc = close(fd);
}
while (rc != 0 && errno == EINTR);
fd = -1;
}
}
// @throws std::bad_alloc, EventsSourceException
SpawnFileActions::SpawnFileActions()
{
actions_mgr = std::unique_ptr<posix_spawn_file_actions_t>(new posix_spawn_file_actions_t);
actions = actions_mgr.get();
if (posix_spawn_file_actions_init(actions) != 0)
{
if (errno == ENOMEM)
{
throw std::bad_alloc();
}
throw EventsSourceException();
}
}
SpawnFileActions::~SpawnFileActions() noexcept
{
posix_spawn_file_actions_destroy(actions);
actions = nullptr;
}
// @throws std::bad_alloc, EventsSourceException
SpawnAttr::SpawnAttr()
{
attr_mgr = std::unique_ptr<posix_spawnattr_t>(new posix_spawnattr_t);
attr = attr_mgr.get();
if (posix_spawnattr_init(attr) != 0)
{
if (errno == ENOMEM)
{
throw std::bad_alloc();
}
throw EventsSourceException();
}
}
SpawnAttr::~SpawnAttr() noexcept
{
posix_spawnattr_destroy(attr);
attr = nullptr;
}
// @throws std::bad_alloc
SpawnArgs::SpawnArgs(const char* const arg_list[])
{
while (arg_list[args_size] != nullptr)
{
++args_size;
}
++args_size;
try
{
args = new char*[args_size];
for (size_t idx = 0; idx < args_size - 1; ++idx)
{
// If the allocation fails, make sure there is a null pointer in this slot
args[idx] = nullptr;
size_t arg_length = std::strlen(arg_list[idx]) + 1;
args[idx] = new char[arg_length];
std::memcpy(args[idx], arg_list[idx], arg_length);
}
args[args_size - 1] = nullptr;
}
catch (std::bad_alloc&)
{
if (args != nullptr)
{
destroy();
}
throw;
}
}
SpawnArgs::~SpawnArgs() noexcept
{
destroy();
}
void SpawnArgs::destroy() noexcept
{
for (size_t idx = 0; idx < args_size && args[idx] != nullptr; ++idx)
{
delete[] args[idx];
args[idx] = nullptr;
}
delete[] args;
args = nullptr;
}
// @throws EventsSourceException
Pipe::Pipe(int (*pipe_fd)[2])
{
managed_pipe = pipe_fd;
if (pipe2(*pipe_fd, 0) != 0)
{
throw EventsSourceException();
}
}
Pipe::~Pipe() noexcept
{
if (managed_pipe != nullptr)
{
posix::close_fd((*managed_pipe)[PIPE_READ_SIDE]);
posix::close_fd((*managed_pipe)[PIPE_WRITE_SIDE]);
}
}
void Pipe::release() noexcept
{
managed_pipe = nullptr;
}
void Pipe::close_read_side() noexcept
{
if (managed_pipe != nullptr)
{
posix::close_fd((*managed_pipe)[PIPE_READ_SIDE]);
}
}
void Pipe::close_write_side() noexcept
{
if (managed_pipe != nullptr)
{
posix::close_fd((*managed_pipe)[PIPE_WRITE_SIDE]);
}
}
}
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