mirror of
https://github.com/tmux/tmux.git
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229 lines
5.0 KiB
C
229 lines
5.0 KiB
C
/* $Id: client.c,v 1.46 2009-03-31 22:20:42 nicm Exp $ */
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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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#ifndef NO_SETPROCTITLE
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setproctitle("client");
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#endif
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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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