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https://github.com/tmux/tmux.git
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Import tmux, a terminal multiplexor allowing (among other things) a single
terminal to be switched between several different windows and programs displayed on one terminal be detached from one terminal and moved to another. ok deraadt pirofti
This commit is contained in:
Nicholas Marriott
226
client.c
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226
client.c
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/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "tmux.h"
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void client_handle_winch(struct client_ctx *);
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int
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client_init(char *path, struct client_ctx *cctx, int start_server, int flags)
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{
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struct sockaddr_un sa;
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struct stat sb;
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struct msg_identify_data data;
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struct winsize ws;
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size_t size;
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int mode;
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struct buffer *b;
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char *name;
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if (lstat(path, &sb) != 0) {
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if (start_server && errno == ENOENT) {
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if ((cctx->srv_fd = server_start(path)) == -1)
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goto start_failed;
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goto server_started;
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}
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goto not_found;
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}
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if (!S_ISSOCK(sb.st_mode)) {
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errno = ENOTSOCK;
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goto not_found;
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}
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memset(&sa, 0, sizeof sa);
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sa.sun_family = AF_UNIX;
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size = strlcpy(sa.sun_path, path, sizeof sa.sun_path);
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if (size >= sizeof sa.sun_path) {
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errno = ENAMETOOLONG;
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goto not_found;
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}
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if ((cctx->srv_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
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fatal("socket");
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if (connect(
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cctx->srv_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
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if (errno == ECONNREFUSED) {
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if (unlink(path) != 0 || !start_server)
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goto not_found;
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if ((cctx->srv_fd = server_start(path)) == -1)
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goto start_failed;
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goto server_started;
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}
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goto not_found;
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}
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server_started:
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if ((mode = fcntl(cctx->srv_fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(cctx->srv_fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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cctx->srv_in = buffer_create(BUFSIZ);
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cctx->srv_out = buffer_create(BUFSIZ);
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if (isatty(STDIN_FILENO)) {
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
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fatal("ioctl(TIOCGWINSZ)");
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data.version = PROTOCOL_VERSION;
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data.flags = flags;
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data.sx = ws.ws_col;
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data.sy = ws.ws_row;
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*data.tty = '\0';
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if (getcwd(data.cwd, sizeof data.cwd) == NULL)
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*data.cwd = '\0';
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if ((name = ttyname(STDIN_FILENO)) == NULL)
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fatal("ttyname failed");
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if (strlcpy(data.tty, name, sizeof data.tty) >= sizeof data.tty)
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fatalx("ttyname failed");
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b = buffer_create(BUFSIZ);
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cmd_send_string(b, getenv("TERM"));
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client_write_server2(cctx, MSG_IDENTIFY,
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&data, sizeof data, BUFFER_OUT(b), BUFFER_USED(b));
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buffer_destroy(b);
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}
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return (0);
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start_failed:
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log_warnx("server failed to start");
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return (1);
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not_found:
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log_warn("server not found");
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return (1);
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}
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int
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client_main(struct client_ctx *cctx)
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{
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struct pollfd pfd;
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char *error;
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int xtimeout; /* Yay for ncurses namespace! */
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siginit();
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logfile("client");
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setproctitle("client");
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error = NULL;
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xtimeout = INFTIM;
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while (!sigterm) {
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if (sigchld) {
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waitpid(WAIT_ANY, NULL, WNOHANG);
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sigchld = 0;
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}
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if (sigwinch)
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client_handle_winch(cctx);
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if (sigcont) {
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siginit();
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client_write_server(cctx, MSG_WAKEUP, NULL, 0);
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sigcont = 0;
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}
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switch (client_msg_dispatch(cctx, &error)) {
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case -1:
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goto out;
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case 0:
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/* May be more in buffer, don't let poll block. */
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xtimeout = 0;
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break;
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default:
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/* Out of data, poll may block. */
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xtimeout = INFTIM;
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break;
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}
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pfd.fd = cctx->srv_fd;
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pfd.events = POLLIN;
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if (BUFFER_USED(cctx->srv_out) > 0)
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pfd.events |= POLLOUT;
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if (poll(&pfd, 1, xtimeout) == -1) {
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if (errno == EAGAIN || errno == EINTR)
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continue;
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fatal("poll failed");
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}
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if (buffer_poll(&pfd, cctx->srv_in, cctx->srv_out) != 0)
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goto server_dead;
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}
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out:
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if (sigterm) {
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printf("[terminated]\n");
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return (1);
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}
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if (cctx->flags & CCTX_SHUTDOWN) {
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printf("[server exited]\n");
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return (0);
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}
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if (cctx->flags & CCTX_EXIT) {
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printf("[exited]\n");
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return (0);
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}
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if (cctx->flags & CCTX_DETACH) {
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printf("[detached]\n");
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return (0);
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}
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printf("[error: %s]\n", error);
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return (1);
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server_dead:
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printf("[lost server]\n");
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return (0);
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}
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void
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client_handle_winch(struct client_ctx *cctx)
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{
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struct msg_resize_data data;
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struct winsize ws;
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
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fatal("ioctl failed");
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data.sx = ws.ws_col;
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data.sy = ws.ws_row;
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client_write_server(cctx, MSG_RESIZE, &data, sizeof data);
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sigwinch = 0;
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}
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