2009-09-21 00:11:27 +02:00
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/* $Id: client.c,v 1.71 2009-09-20 22:11:27 tcunha Exp $ */
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2007-09-26 15:43:15 +02:00
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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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2009-02-08 17:11:26 +01:00
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#include <sys/wait.h>
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2007-09-26 15:43:15 +02:00
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#include <errno.h>
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#include <fcntl.h>
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2009-01-11 01:48:42 +01:00
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#include <pwd.h>
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2007-09-26 15:43:15 +02:00
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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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2009-08-09 19:48:55 +02:00
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void client_send_environ(struct client_ctx *);
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2007-09-26 15:43:15 +02:00
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void client_handle_winch(struct client_ctx *);
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int
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2009-07-23 15:15:41 +02:00
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client_init(char *path, struct client_ctx *cctx, int cmdflags, int flags)
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2007-09-26 15:43:15 +02:00
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{
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2007-10-03 23:31:07 +02:00
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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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2007-10-23 12:25:03 +02:00
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size_t size;
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2009-08-14 23:26:07 +02:00
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int fd, fd2, mode;
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2009-07-29 00:12:16 +02:00
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char *name, *term;
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2009-06-25 17:58:33 +02:00
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#ifdef HAVE_SETPROCTITLE
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char rpathbuf[MAXPATHLEN];
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#endif
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#ifdef HAVE_SETPROCTITLE
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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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#endif
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2007-09-26 15:43:15 +02:00
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2009-03-27 09:58:28 +01:00
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if (lstat(path, &sb) != 0) {
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2009-07-23 15:15:41 +02:00
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if (cmdflags & CMD_STARTSERVER && errno == ENOENT) {
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2009-08-09 19:43:00 +02:00
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if ((fd = server_start(path)) == -1)
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2009-01-19 18:16:09 +01:00
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goto start_failed;
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goto server_started;
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2007-09-27 22:53:13 +02:00
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}
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2009-01-19 18:16:09 +01:00
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goto not_found;
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2007-09-27 22:53:13 +02:00
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}
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if (!S_ISSOCK(sb.st_mode)) {
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2007-12-01 12:10:33 +01:00
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errno = ENOTSOCK;
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2009-01-19 18:16:09 +01:00
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goto not_found;
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2007-09-27 22:53:13 +02:00
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}
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2007-09-26 15:43:15 +02:00
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memset(&sa, 0, sizeof sa);
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sa.sun_family = AF_UNIX;
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2007-10-23 12:25:03 +02:00
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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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2007-12-01 12:10:33 +01:00
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errno = ENAMETOOLONG;
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2009-01-19 18:16:09 +01:00
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goto not_found;
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2007-09-26 15:43:15 +02:00
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}
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2009-08-09 19:43:00 +02:00
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if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
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2009-09-21 00:11:27 +02:00
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fatal("socket failed");
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2007-12-01 12:10:33 +01:00
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2009-08-09 19:43:00 +02:00
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if (connect(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
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2009-01-19 18:16:09 +01:00
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if (errno == ECONNREFUSED) {
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2009-07-23 15:15:41 +02:00
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if (unlink(path) != 0 || !(cmdflags & CMD_STARTSERVER))
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2009-01-19 18:16:09 +01:00
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goto not_found;
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2009-08-09 19:43:00 +02:00
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if ((fd = server_start(path)) == -1)
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2009-01-19 18:16:09 +01:00
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goto start_failed;
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goto server_started;
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2007-09-26 20:12:19 +02:00
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}
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2009-01-19 18:16:09 +01:00
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goto not_found;
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2007-09-26 15:43:15 +02:00
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}
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2009-01-19 18:16:09 +01:00
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server_started:
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2009-08-09 19:43:00 +02:00
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if ((mode = fcntl(fd, F_GETFL)) == -1)
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2009-04-01 00:20:42 +02:00
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fatal("fcntl failed");
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2009-08-09 19:43:00 +02:00
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if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
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2009-04-01 00:20:42 +02:00
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fatal("fcntl failed");
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2009-08-14 23:04:04 +02:00
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imsg_init(&cctx->ibuf, fd);
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2007-09-26 15:43:15 +02:00
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2009-08-09 19:48:55 +02:00
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if (cmdflags & CMD_SENDENVIRON)
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client_send_environ(cctx);
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2007-11-26 21:36:30 +01:00
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if (isatty(STDIN_FILENO)) {
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2007-12-01 12:10:33 +01:00
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
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fatal("ioctl(TIOCGWINSZ)");
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2008-09-10 00:16:37 +02:00
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data.flags = flags;
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2007-10-03 23:31:07 +02:00
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data.sx = ws.ws_col;
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data.sy = ws.ws_row;
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2009-07-29 00:12:16 +02:00
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2009-01-10 20:37:35 +01:00
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if (getcwd(data.cwd, sizeof data.cwd) == NULL)
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*data.cwd = '\0';
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2008-06-18 22:58:03 +02:00
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2009-07-29 00:12:16 +02:00
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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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2008-06-18 22:58:03 +02:00
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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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2008-06-01 23:24:33 +02:00
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2009-08-14 23:26:07 +02:00
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fd2 = dup(STDIN_FILENO);
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2009-08-14 23:23:20 +02:00
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imsg_compose(&cctx->ibuf, MSG_IDENTIFY,
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2009-08-14 23:26:07 +02:00
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PROTOCOL_VERSION, -1, fd2, &data, sizeof data);
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2007-09-29 15:22:15 +02:00
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}
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2007-10-03 23:31:07 +02:00
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return (0);
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2007-12-01 12:10:33 +01:00
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2009-01-19 18:16:09 +01:00
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start_failed:
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2008-06-07 09:27:28 +02:00
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log_warnx("server failed to start");
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return (1);
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2009-01-19 18:16:09 +01:00
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not_found:
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2007-12-01 12:10:33 +01:00
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log_warn("server not found");
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2008-06-02 23:08:36 +02:00
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return (1);
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2007-09-28 21:04:21 +02:00
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}
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2009-08-09 19:48:55 +02:00
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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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2007-09-26 15:43:15 +02:00
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int
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client_main(struct client_ctx *cctx)
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{
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2007-11-27 20:23:34 +01:00
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struct pollfd pfd;
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2009-09-03 23:06:30 +02:00
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int n, nfds;
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2007-09-26 15:43:15 +02:00
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2007-11-08 11:39:52 +01:00
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siginit();
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2007-09-26 15:43:15 +02:00
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logfile("client");
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2009-09-03 23:06:30 +02:00
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/*
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* imsg_read in the first client poll loop (before the terminal has
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* been initialiased) may have read messages into the buffer after the
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* MSG_READY switched to here. Process anything outstanding now so poll
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* doesn't hang waiting for messages that have already arrived.
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*/
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if (client_msg_dispatch(cctx) != 0)
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goto out;
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2009-07-30 22:50:10 +02:00
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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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2009-02-08 17:11:26 +01:00
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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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2007-09-26 15:43:15 +02:00
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if (sigwinch)
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client_handle_winch(cctx);
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2009-01-18 13:09:42 +01:00
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if (sigcont) {
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siginit();
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2009-05-04 19:58:27 +02:00
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client_write_server(cctx, MSG_WAKEUP, NULL, 0);
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2009-01-18 13:09:42 +01:00
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sigcont = 0;
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}
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2007-09-26 15:43:15 +02:00
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2009-08-14 23:04:04 +02:00
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pfd.fd = cctx->ibuf.fd;
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2007-11-27 20:23:34 +01:00
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pfd.events = POLLIN;
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2009-08-14 23:04:04 +02:00
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if (cctx->ibuf.w.queued > 0)
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2007-11-27 20:23:34 +01:00
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pfd.events |= POLLOUT;
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2007-12-06 10:46:23 +01:00
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2009-08-14 23:04:04 +02:00
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if ((nfds = poll(&pfd, 1, INFTIM)) == -1) {
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2007-09-26 15:43:15 +02:00
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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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2009-08-14 23:04:04 +02:00
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if (nfds == 0)
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continue;
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2007-09-26 15:43:15 +02:00
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2009-08-14 23:04:04 +02:00
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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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2009-09-03 23:06:30 +02:00
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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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break;
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}
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2009-08-14 23:04:04 +02:00
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if (client_msg_dispatch(cctx) != 0)
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break;
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2009-07-24 01:42:59 +02:00
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}
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2009-07-30 22:57:39 +02:00
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2009-08-14 23:04:04 +02:00
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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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2007-09-26 20:50:49 +02:00
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}
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2009-09-03 23:06:30 +02:00
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out:
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2007-10-05 16:23:28 +02:00
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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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2009-07-24 01:42:59 +02:00
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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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2009-01-21 23:47:31 +01:00
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printf("[server exited]\n");
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return (0);
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2009-07-24 01:42:59 +02:00
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case CCTX_EXIT:
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2009-09-02 22:16:29 +02:00
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if (cctx->errstr != NULL) {
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printf("[error: %s]\n", cctx->errstr);
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return (1);
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}
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2007-10-05 16:23:28 +02:00
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printf("[exited]\n");
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return (0);
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2009-07-24 01:42:59 +02:00
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case CCTX_DETACH:
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2007-10-05 16:23:28 +02:00
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printf("[detached]\n");
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return (0);
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2009-09-02 22:01:22 +02:00
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default:
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2009-09-02 22:16:29 +02:00
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printf("[unknown error]\n");
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2009-09-02 22:01:22 +02:00
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return (1);
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2007-10-05 16:23:28 +02:00
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}
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2007-09-26 15:43:15 +02:00
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}
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void
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client_handle_winch(struct client_ctx *cctx)
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{
|
2007-10-03 23:31:07 +02:00
|
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struct msg_resize_data data;
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struct winsize ws;
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2007-12-06 10:46:23 +01:00
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2007-10-03 23:31:07 +02:00
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1)
|
2007-09-26 15:43:15 +02:00
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fatal("ioctl failed");
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|
2007-10-03 23:31:07 +02:00
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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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2007-12-06 10:46:23 +01:00
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2007-09-26 15:43:15 +02:00
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sigwinch = 0;
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}
|
2009-07-30 22:57:39 +02:00
|
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int
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client_msg_dispatch(struct client_ctx *cctx)
|
|
|
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{
|
2009-08-14 23:04:04 +02:00
|
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struct imsg imsg;
|
2009-07-30 22:57:39 +02:00
|
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struct msg_print_data printdata;
|
2009-08-14 23:04:04 +02:00
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ssize_t n, datalen;
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|
2009-07-30 22:57:39 +02:00
|
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for (;;) {
|
2009-08-14 23:04:04 +02:00
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if ((n = imsg_get(&cctx->ibuf, &imsg)) == -1)
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fatalx("imsg_get failed");
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|
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if (n == 0)
|
2009-07-30 22:57:39 +02:00
|
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return (0);
|
2009-08-14 23:04:04 +02:00
|
|
|
datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
|
2009-07-30 22:57:39 +02:00
|
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|
2009-08-14 23:04:04 +02:00
|
|
|
switch (imsg.hdr.type) {
|
2009-07-30 22:57:39 +02:00
|
|
|
case MSG_DETACH:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != 0)
|
2009-07-30 22:57:39 +02:00
|
|
|
fatalx("bad MSG_DETACH size");
|
|
|
|
|
|
|
|
client_write_server(cctx, MSG_EXITING, NULL, 0);
|
|
|
|
cctx->exittype = CCTX_DETACH;
|
|
|
|
break;
|
|
|
|
case MSG_ERROR:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != sizeof printdata)
|
|
|
|
fatalx("bad MSG_ERROR size");
|
|
|
|
memcpy(&printdata, imsg.data, sizeof printdata);
|
2009-07-30 22:57:39 +02:00
|
|
|
|
2009-08-09 19:48:55 +02:00
|
|
|
printdata.msg[(sizeof printdata.msg) - 1] = '\0';
|
2009-09-02 22:16:29 +02:00
|
|
|
/* Error string used after exit message from server. */
|
2009-07-30 22:57:39 +02:00
|
|
|
cctx->errstr = xstrdup(printdata.msg);
|
2009-08-14 23:04:04 +02:00
|
|
|
imsg_free(&imsg);
|
2009-07-30 22:57:39 +02:00
|
|
|
return (-1);
|
|
|
|
case MSG_EXIT:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != 0)
|
2009-07-30 22:57:39 +02:00
|
|
|
fatalx("bad MSG_EXIT size");
|
2009-08-14 23:04:04 +02:00
|
|
|
|
2009-07-30 22:57:39 +02:00
|
|
|
client_write_server(cctx, MSG_EXITING, NULL, 0);
|
|
|
|
cctx->exittype = CCTX_EXIT;
|
|
|
|
break;
|
|
|
|
case MSG_EXITED:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != 0)
|
2009-07-30 22:57:39 +02:00
|
|
|
fatalx("bad MSG_EXITED size");
|
|
|
|
|
2009-08-14 23:04:04 +02:00
|
|
|
imsg_free(&imsg);
|
2009-07-30 22:57:39 +02:00
|
|
|
return (-1);
|
|
|
|
case MSG_SHUTDOWN:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != 0)
|
2009-07-30 22:57:39 +02:00
|
|
|
fatalx("bad MSG_SHUTDOWN size");
|
|
|
|
|
|
|
|
client_write_server(cctx, MSG_EXITING, NULL, 0);
|
|
|
|
cctx->exittype = CCTX_SHUTDOWN;
|
|
|
|
break;
|
|
|
|
case MSG_SUSPEND:
|
2009-08-14 23:04:04 +02:00
|
|
|
if (datalen != 0)
|
2009-07-30 22:57:39 +02:00
|
|
|
fatalx("bad MSG_SUSPEND size");
|
|
|
|
|
|
|
|
client_suspend();
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
fatalx("unexpected message");
|
|
|
|
}
|
2009-08-14 23:04:04 +02:00
|
|
|
|
|
|
|
imsg_free(&imsg);
|
2009-07-30 22:57:39 +02:00
|
|
|
}
|
|
|
|
}
|