mirror of https://github.com/polybar/polybar.git
121 lines
2.7 KiB
C++
121 lines
2.7 KiB
C++
#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include "errors.hpp"
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#include "utils/file.hpp"
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#include "utils/mixins.hpp"
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#include "utils/socket.hpp"
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POLYBAR_NS
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using std::snprintf;
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using std::strlen;
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namespace socket_util {
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/**
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* Constructor: establishing socket connection
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*/
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unix_connection::unix_connection(string&& path) : m_socketpath(path) {
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struct sockaddr_un socket_addr {};
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socket_addr.sun_family = AF_UNIX;
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if ((m_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
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throw system_error("Failed to open unix connection");
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}
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snprintf(socket_addr.sun_path, sizeof(socket_addr.sun_path), "%s", m_socketpath.c_str());
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auto len = sizeof(socket_addr);
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if (connect(m_fd, reinterpret_cast<struct sockaddr*>(&socket_addr), len) == -1) {
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throw system_error("Failed to connect to socket");
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}
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}
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/**
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* Destructor: closes file descriptor
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*/
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unix_connection::~unix_connection() noexcept {
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if (m_fd != -1) {
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close(m_fd);
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}
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}
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/**
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* Close reading end of connection
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*/
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int unix_connection::disconnect() {
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return shutdown(m_fd, SHUT_RD);
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}
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/**
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* Transmit fixed size data
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*/
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ssize_t unix_connection::send(const void* data, size_t len, int flags) {
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ssize_t bytes_sent = 0;
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if ((bytes_sent = ::send(m_fd, data, len, flags)) == -1) {
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throw system_error("Failed to transmit data");
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}
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return bytes_sent;
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}
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/**
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* Transmit string data
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*/
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ssize_t unix_connection::send(const string& data, int flags) {
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return send(data.c_str(), data.length(), flags);
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}
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/**
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* Receive data
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*/
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string unix_connection::receive(const ssize_t receive_bytes, ssize_t* bytes_received, int flags) {
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char buffer[BUFSIZ];
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if ((*bytes_received = ::recv(m_fd, buffer, receive_bytes, flags)) == -1) {
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throw system_error("Failed to receive data");
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} else {
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buffer[*bytes_received] = 0;
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}
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return string{buffer};
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}
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/**
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* \see receive
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*/
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string unix_connection::receive(const ssize_t receive_bytes, int flags) {
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ssize_t bytes{0};
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return receive(receive_bytes, &bytes, flags);
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}
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/**
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* Peek at the specified number of bytes
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*/
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bool unix_connection::peek(const size_t peek_bytes) {
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ssize_t bytes_seen{0};
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receive(peek_bytes, &bytes_seen, MSG_PEEK);
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return bytes_seen > 0;
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}
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/**
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* Poll file descriptor for to check for available data
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*/
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bool unix_connection::poll(short int events, int timeout_ms) {
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struct pollfd fds[1];
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fds[0].fd = m_fd;
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fds[0].events = events;
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if (::poll(fds, 1, timeout_ms) == -1) {
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throw system_error("Failed to poll file descriptor");
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}
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return fds[0].revents & events;
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}
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}
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POLYBAR_NS_END
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