forked from github/abduco
146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
static Client client;
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static void client_sigwinch_handler(int sig) {
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client.need_resize = true;
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}
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static ssize_t write_all(int fd, const char *buf, size_t len) {
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ssize_t ret = len;
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while (len > 0) {
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ssize_t res = write(fd, buf, len);
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if (res < 0) {
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if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
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continue;
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return -1;
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}
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if (res == 0)
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return ret - len;
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buf += res;
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len -= res;
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}
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return ret;
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}
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static ssize_t read_all(int fd, char *buf, size_t len) {
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ssize_t ret = len;
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while (len > 0) {
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ssize_t res = read(fd, buf, len);
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if (res < 0) {
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if (errno == EWOULDBLOCK)
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return ret - len;
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if (errno == EAGAIN || errno == EINTR)
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continue;
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return -1;
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}
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if (res == 0)
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return ret - len;
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buf += res;
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len -= res;
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}
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return ret;
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}
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static bool client_send_packet(Packet *pkt) {
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print_packet("client-send:", pkt);
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size_t size = packet_size(pkt);
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if (write_all(server.socket, (char *)pkt, size) != size) {
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debug("FAILED\n");
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server.running = false;
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return false;
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}
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return true;
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}
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static bool client_recv_packet(Packet *pkt) {
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ssize_t len = read_all(server.socket, (char*)pkt, packet_header_size());
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if (len <= 0 || len != packet_header_size() || pkt->len == 0)
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goto error;
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len = read_all(server.socket, pkt->u.msg, pkt->len);
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print_packet("client-recv:", pkt);
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if (len <= 0 || len != pkt->len)
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goto error;
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return true;
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error:
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debug("FAILED here\n");
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server.running = false;
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return false;
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}
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static void client_clear_screen() {
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printf("\e[H\e[J");
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fflush(stdout);
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}
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static void client_show_cursor() {
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printf("\e[?25h");
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fflush(stdout);
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}
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static void client_restore_terminal() {
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if (has_term)
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tcsetattr(0, TCSADRAIN, &orig_term);
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client_show_cursor();
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}
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static int client_mainloop() {
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client.need_resize = true;
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while (server.running) {
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(STDIN_FILENO, &fds);
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FD_SET(server.socket, &fds);
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if (client.need_resize) {
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struct winsize ws;
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if (ioctl(0, TIOCGWINSZ, &ws) != -1) {
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Packet pkt = {
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.type = MSG_RESIZE,
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.u = { .ws = ws },
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.len = sizeof(ws),
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};
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if (client_send_packet(&pkt))
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client.need_resize = false;
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}
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}
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if (select(server.socket + 1, &fds, NULL, NULL, NULL) == -1) {
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if (errno == EINTR)
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continue;
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die("client-mainloop");
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}
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if (FD_ISSET(server.socket, &fds)) {
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Packet pkt;
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if (client_recv_packet(&pkt)) {
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switch (pkt.type) {
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case MSG_CONTENT:
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write_all(STDOUT_FILENO, pkt.u.msg, pkt.len);
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break;
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}
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}
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}
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if (FD_ISSET(STDIN_FILENO, &fds)) {
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Packet pkt = { .type = MSG_CONTENT };
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ssize_t len = read(STDIN_FILENO, pkt.u.msg, sizeof(pkt.u.msg));
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if (len == -1 && errno != EAGAIN && errno != EINTR)
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die("client-stdin");
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if (len > 0) {
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pkt.len = len;
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if (pkt.u.msg[0] == KEY_REDRAW) {
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client.need_resize = true;
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} else if (pkt.u.msg[0] == KEY_DETACH) {
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pkt.type = MSG_DETACH;
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pkt.len = 0;
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client_send_packet(&pkt);
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return -1;
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} else {
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client_send_packet(&pkt);
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}
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}
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}
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}
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return 0;
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}
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