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/* $OpenBSD: client.c,v 1.7 2009/07/26 12:58:44 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "tmux.h"
void client_handle_winch(struct client_ctx *);
int
client_init(char *path, struct client_ctx *cctx, int cmdflags, int flags)
{
struct sockaddr_un sa;
struct stat sb;
struct msg_identify_data data;
struct winsize ws;
size_t size;
int mode;
char *name, *term;
char rpathbuf[MAXPATHLEN];
if (realpath(path, rpathbuf) == NULL)
strlcpy(rpathbuf, path, sizeof rpathbuf);
setproctitle("client (%s)", rpathbuf);
if (lstat(path, &sb) != 0) {
if (cmdflags & CMD_STARTSERVER && errno == ENOENT) {
if ((cctx->srv_fd = server_start(path)) == -1)
goto start_failed;
goto server_started;
}
goto not_found;
}
if (!S_ISSOCK(sb.st_mode)) {
errno = ENOTSOCK;
goto not_found;
}
memset(&sa, 0, sizeof sa);
sa.sun_family = AF_UNIX;
size = strlcpy(sa.sun_path, path, sizeof sa.sun_path);
if (size >= sizeof sa.sun_path) {
errno = ENAMETOOLONG;
goto not_found;
}
if ((cctx->srv_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
fatal("socket");
if (connect(
cctx->srv_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
if (errno == ECONNREFUSED) {
if (unlink(path) != 0 || !(cmdflags & CMD_STARTSERVER))
goto not_found;
if ((cctx->srv_fd = server_start(path)) == -1)
goto start_failed;
goto server_started;
}
goto not_found;
}
server_started:
if ((mode = fcntl(cctx->srv_fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(cctx->srv_fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
cctx->srv_in = buffer_create(BUFSIZ);
cctx->srv_out = buffer_create(BUFSIZ);
if (isatty(STDIN_FILENO)) {
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
fatal("ioctl(TIOCGWINSZ)");
data.version = PROTOCOL_VERSION;
data.flags = flags;
data.sx = ws.ws_col;
data.sy = ws.ws_row;
if (getcwd(data.cwd, sizeof data.cwd) == NULL)
*data.cwd = '\0';
*data.term = '\0';
if ((term = getenv("TERM")) != NULL) {
if (strlcpy(data.term,
term, sizeof data.term) >= sizeof data.term)
*data.term = '\0';
}
*data.tty = '\0';
if ((name = ttyname(STDIN_FILENO)) == NULL)
fatal("ttyname failed");
if (strlcpy(data.tty, name, sizeof data.tty) >= sizeof data.tty)
fatalx("ttyname failed");
client_write_server(cctx, MSG_IDENTIFY, &data, sizeof data);
}
return (0);
start_failed:
log_warnx("server failed to start");
return (1);
not_found:
log_warn("server not found");
return (1);
}
int
client_main(struct client_ctx *cctx)
{
struct pollfd pfd;
int xtimeout; /* Yay for ncurses namespace! */
siginit();
logfile("client");
while (!sigterm) {
if (sigchld) {
waitpid(WAIT_ANY, NULL, WNOHANG);
sigchld = 0;
}
if (sigwinch)
client_handle_winch(cctx);
if (sigcont) {
siginit();
client_write_server(cctx, MSG_WAKEUP, NULL, 0);
sigcont = 0;
}
switch (client_msg_dispatch(cctx)) {
case -1:
goto out;
case 0:
/* May be more in buffer, don't let poll block. */
xtimeout = 0;
break;
default:
/* Out of data, poll may block. */
xtimeout = INFTIM;
break;
}
pfd.fd = cctx->srv_fd;
pfd.events = POLLIN;
if (BUFFER_USED(cctx->srv_out) > 0)
pfd.events |= POLLOUT;
if (poll(&pfd, 1, xtimeout) == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
fatal("poll failed");
}
if (buffer_poll(&pfd, cctx->srv_in, cctx->srv_out) != 0) {
cctx->exittype = CCTX_DIED;
break;
}
}
out:
if (sigterm) {
printf("[terminated]\n");
return (1);
}
switch (cctx->exittype) {
case CCTX_DIED:
printf("[lost server]\n");
return (0);
case CCTX_SHUTDOWN:
printf("[server exited]\n");
return (0);
case CCTX_EXIT:
printf("[exited]\n");
return (0);
case CCTX_DETACH:
printf("[detached]\n");
return (0);
default:
printf("[error: %s]\n", cctx->errstr);
return (1);
}
}
void
client_handle_winch(struct client_ctx *cctx)
{
struct msg_resize_data data;
struct winsize ws;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
fatal("ioctl failed");
data.sx = ws.ws_col;
data.sy = ws.ws_row;
client_write_server(cctx, MSG_RESIZE, &data, sizeof data);
sigwinch = 0;
}
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