mirror of
https://github.com/tmux/tmux.git
synced 2025-11-04 01:34:18 +00:00
85e8b70625
the parent, otherwise TIOCGWINSZ will fail when the window is resized (that could actually be moved into the server but this is more future-proof and avoids breaking the protocol).
313 lines
6.9 KiB
C
313 lines
6.9 KiB
C
/* $OpenBSD$ */
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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_send_environ(struct client_ctx *);
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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 cmdflags, 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 fd, fd2, mode;
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char *name, *term;
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char rpathbuf[MAXPATHLEN];
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if (realpath(path, rpathbuf) == NULL)
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strlcpy(rpathbuf, path, sizeof rpathbuf);
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setproctitle("client (%s)", rpathbuf);
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if (lstat(path, &sb) != 0) {
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if (cmdflags & CMD_STARTSERVER && errno == ENOENT) {
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if ((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 ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
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fatal("socket");
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if (connect(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
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if (errno == ECONNREFUSED) {
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if (unlink(path) != 0 || !(cmdflags & CMD_STARTSERVER))
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goto not_found;
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if ((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(fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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imsg_init(&cctx->ibuf, fd);
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if (cmdflags & CMD_SENDENVIRON)
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client_send_environ(cctx);
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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.flags = flags;
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data.sx = ws.ws_col;
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data.sy = ws.ws_row;
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if (getcwd(data.cwd, sizeof data.cwd) == NULL)
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*data.cwd = '\0';
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*data.term = '\0';
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if ((term = getenv("TERM")) != NULL) {
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if (strlcpy(data.term,
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term, sizeof data.term) >= sizeof data.term)
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*data.term = '\0';
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}
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*data.tty = '\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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fd2 = dup(STDIN_FILENO);
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imsg_compose(&cctx->ibuf, MSG_IDENTIFY,
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PROTOCOL_VERSION, -1, fd2, &data, sizeof data);
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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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void
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client_send_environ(struct client_ctx *cctx)
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{
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char **var;
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struct msg_environ_data data;
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for (var = environ; *var != NULL; var++) {
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if (strlcpy(data.var, *var, sizeof data.var) >= sizeof data.var)
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continue;
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client_write_server(cctx, MSG_ENVIRON, &data, sizeof data);
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}
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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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int nfds;
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siginit();
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logfile("client");
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for (;;) {
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if (sigterm)
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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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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pfd.fd = cctx->ibuf.fd;
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pfd.events = POLLIN;
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if (cctx->ibuf.w.queued > 0)
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pfd.events |= POLLOUT;
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if ((nfds = poll(&pfd, 1, INFTIM)) == -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 (nfds == 0)
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continue;
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if (pfd.revents & (POLLERR|POLLHUP|POLLNVAL))
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fatalx("socket error");
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if (pfd.revents & POLLIN) {
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if (client_msg_dispatch(cctx) != 0)
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break;
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}
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if (pfd.revents & POLLOUT) {
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if (msgbuf_write(&cctx->ibuf.w) < 0) {
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cctx->exittype = CCTX_DIED;
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break;
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}
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}
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}
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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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switch (cctx->exittype) {
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case CCTX_DIED:
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printf("[lost server]\n");
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return (0);
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case CCTX_SHUTDOWN:
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printf("[server exited]\n");
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return (0);
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case CCTX_EXIT:
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printf("[exited]\n");
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return (0);
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case CCTX_DETACH:
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printf("[detached]\n");
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return (0);
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default:
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printf("[error: %s]\n", cctx->errstr);
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return (1);
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}
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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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int
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client_msg_dispatch(struct client_ctx *cctx)
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{
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struct imsg imsg;
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struct msg_print_data printdata;
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ssize_t n, datalen;
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if ((n = imsg_read(&cctx->ibuf)) == -1 || n == 0) {
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cctx->exittype = CCTX_DIED;
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return (-1);
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}
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for (;;) {
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if ((n = imsg_get(&cctx->ibuf, &imsg)) == -1)
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fatalx("imsg_get failed");
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if (n == 0)
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return (0);
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datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
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switch (imsg.hdr.type) {
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case MSG_DETACH:
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if (datalen != 0)
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fatalx("bad MSG_DETACH size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->exittype = CCTX_DETACH;
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break;
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case MSG_ERROR:
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if (datalen != sizeof printdata)
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fatalx("bad MSG_ERROR size");
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memcpy(&printdata, imsg.data, sizeof printdata);
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printdata.msg[(sizeof printdata.msg) - 1] = '\0';
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cctx->errstr = xstrdup(printdata.msg);
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imsg_free(&imsg);
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return (-1);
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case MSG_EXIT:
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if (datalen != 0)
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fatalx("bad MSG_EXIT size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->exittype = CCTX_EXIT;
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break;
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case MSG_EXITED:
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if (datalen != 0)
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fatalx("bad MSG_EXITED size");
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imsg_free(&imsg);
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return (-1);
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case MSG_SHUTDOWN:
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if (datalen != 0)
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fatalx("bad MSG_SHUTDOWN size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->exittype = CCTX_SHUTDOWN;
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break;
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case MSG_SUSPEND:
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if (datalen != 0)
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fatalx("bad MSG_SUSPEND size");
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client_suspend();
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break;
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default:
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fatalx("unexpected message");
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}
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imsg_free(&imsg);
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}
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}
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