mirror of
https://github.com/tmate-io/tmate.git
synced 2024-11-27 18:43:11 +01:00
6491274f60
within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
551 lines
14 KiB
C
551 lines
14 KiB
C
/* $OpenBSD$ */
|
|
|
|
/*
|
|
* 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/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <paths.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
#ifdef DEBUG
|
|
const char *malloc_options = "AFGJPX";
|
|
#endif
|
|
|
|
volatile sig_atomic_t sigwinch;
|
|
volatile sig_atomic_t sigterm;
|
|
volatile sig_atomic_t sigcont;
|
|
volatile sig_atomic_t sigchld;
|
|
volatile sig_atomic_t sigusr1;
|
|
volatile sig_atomic_t sigusr2;
|
|
|
|
char *cfg_file;
|
|
struct options global_s_options; /* session options */
|
|
struct options global_w_options; /* window options */
|
|
struct environ global_environ;
|
|
|
|
int server_locked;
|
|
u_int password_failures;
|
|
char *server_password;
|
|
time_t server_activity;
|
|
|
|
int debug_level;
|
|
int be_quiet;
|
|
time_t start_time;
|
|
char *socket_path;
|
|
|
|
__dead void usage(void);
|
|
char *makesockpath(const char *);
|
|
int prepare_unlock(enum msgtype *, void **, size_t *, int);
|
|
int prepare_cmd(enum msgtype *, void **, size_t *, int, char **);
|
|
|
|
__dead void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [-28dqUuv] [-f file] [-L socket-name] [-S socket-path]\n"
|
|
" [command [flags]]\n",
|
|
__progname);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
logfile(const char *name)
|
|
{
|
|
char *path;
|
|
|
|
log_close();
|
|
if (debug_level > 0) {
|
|
xasprintf(
|
|
&path, "%s-%s-%ld.log", __progname, name, (long) getpid());
|
|
log_open_file(debug_level, path);
|
|
xfree(path);
|
|
}
|
|
}
|
|
|
|
void
|
|
sighandler(int sig)
|
|
{
|
|
int saved_errno;
|
|
|
|
saved_errno = errno;
|
|
switch (sig) {
|
|
case SIGWINCH:
|
|
sigwinch = 1;
|
|
break;
|
|
case SIGTERM:
|
|
sigterm = 1;
|
|
break;
|
|
case SIGCHLD:
|
|
sigchld = 1;
|
|
break;
|
|
case SIGCONT:
|
|
sigcont = 1;
|
|
break;
|
|
case SIGUSR1:
|
|
sigusr1 = 1;
|
|
break;
|
|
case SIGUSR2:
|
|
sigusr2 = 1;
|
|
break;
|
|
}
|
|
errno = saved_errno;
|
|
}
|
|
|
|
void
|
|
siginit(void)
|
|
{
|
|
struct sigaction act;
|
|
|
|
memset(&act, 0, sizeof act);
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = SA_RESTART;
|
|
|
|
act.sa_handler = SIG_IGN;
|
|
if (sigaction(SIGPIPE, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGINT, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGTSTP, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGQUIT, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
|
|
act.sa_handler = sighandler;
|
|
if (sigaction(SIGWINCH, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGTERM, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGCHLD, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGUSR1, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGUSR2, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
}
|
|
|
|
void
|
|
sigreset(void)
|
|
{
|
|
struct sigaction act;
|
|
|
|
memset(&act, 0, sizeof act);
|
|
sigemptyset(&act.sa_mask);
|
|
|
|
act.sa_handler = SIG_DFL;
|
|
if (sigaction(SIGPIPE, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGUSR1, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGUSR2, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGINT, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGTSTP, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGQUIT, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGWINCH, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGTERM, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
if (sigaction(SIGCHLD, &act, NULL) != 0)
|
|
fatal("sigaction failed");
|
|
}
|
|
|
|
char *
|
|
makesockpath(const char *label)
|
|
{
|
|
char base[MAXPATHLEN], *path;
|
|
struct stat sb;
|
|
u_int uid;
|
|
|
|
uid = getuid();
|
|
xsnprintf(base, MAXPATHLEN, "%s/%s-%d", _PATH_TMP, __progname, uid);
|
|
|
|
if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
|
|
return (NULL);
|
|
|
|
if (lstat(base, &sb) != 0)
|
|
return (NULL);
|
|
if (!S_ISDIR(sb.st_mode)) {
|
|
errno = ENOTDIR;
|
|
return (NULL);
|
|
}
|
|
if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
|
|
errno = EACCES;
|
|
return (NULL);
|
|
}
|
|
|
|
xasprintf(&path, "%s/%s", base, label);
|
|
return (path);
|
|
}
|
|
|
|
int
|
|
prepare_unlock(enum msgtype *msg, void **buf, size_t *len, int argc)
|
|
{
|
|
static struct msg_unlock_data unlockdata;
|
|
char *pass;
|
|
|
|
if (argc != 0) {
|
|
log_warnx("can't specify a command when unlocking");
|
|
return (-1);
|
|
}
|
|
|
|
if ((pass = getpass("Password: ")) == NULL)
|
|
return (-1);
|
|
|
|
if (strlen(pass) >= sizeof unlockdata.pass) {
|
|
log_warnx("password too long");
|
|
return (-1);
|
|
}
|
|
|
|
strlcpy(unlockdata.pass, pass, sizeof unlockdata.pass);
|
|
memset(pass, 0, strlen(pass));
|
|
|
|
*buf = &unlockdata;
|
|
*len = sizeof unlockdata;
|
|
|
|
*msg = MSG_UNLOCK;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
prepare_cmd(enum msgtype *msg, void **buf, size_t *len, int argc, char **argv)
|
|
{
|
|
static struct msg_command_data cmddata;
|
|
|
|
client_fill_session(&cmddata);
|
|
|
|
cmddata.argc = argc;
|
|
if (cmd_pack_argv(argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
|
|
log_warnx("command too long");
|
|
return (-1);
|
|
}
|
|
|
|
*buf = &cmddata;
|
|
*len = sizeof cmddata;
|
|
|
|
*msg = MSG_COMMAND;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct client_ctx cctx;
|
|
struct cmd_list *cmdlist;
|
|
struct cmd *cmd;
|
|
struct pollfd pfd;
|
|
enum msgtype msg;
|
|
struct hdr hdr;
|
|
struct passwd *pw;
|
|
struct msg_print_data printdata;
|
|
char *s, *path, *label, *home, *cause, **var;
|
|
char cwd[MAXPATHLEN];
|
|
void *buf;
|
|
size_t len;
|
|
int retcode, opt, flags, unlock, cmdflags = 0;
|
|
|
|
unlock = flags = 0;
|
|
label = path = NULL;
|
|
while ((opt = getopt(argc, argv, "28df:L:qS:uUv")) != -1) {
|
|
switch (opt) {
|
|
case '2':
|
|
flags |= IDENTIFY_256COLOURS;
|
|
flags &= ~IDENTIFY_88COLOURS;
|
|
break;
|
|
case '8':
|
|
flags |= IDENTIFY_88COLOURS;
|
|
flags &= ~IDENTIFY_256COLOURS;
|
|
break;
|
|
case 'f':
|
|
if (cfg_file)
|
|
xfree(cfg_file);
|
|
cfg_file = xstrdup(optarg);
|
|
break;
|
|
case 'L':
|
|
if (label != NULL)
|
|
xfree(label);
|
|
label = xstrdup(optarg);
|
|
break;
|
|
case 'S':
|
|
if (path != NULL)
|
|
xfree(path);
|
|
path = xstrdup(optarg);
|
|
break;
|
|
case 'q':
|
|
be_quiet = 1;
|
|
break;
|
|
case 'u':
|
|
flags |= IDENTIFY_UTF8;
|
|
break;
|
|
case 'U':
|
|
unlock = 1;
|
|
break;
|
|
case 'd':
|
|
flags |= IDENTIFY_HASDEFAULTS;
|
|
break;
|
|
case 'v':
|
|
debug_level++;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
log_open_tty(debug_level);
|
|
siginit();
|
|
|
|
environ_init(&global_environ);
|
|
for (var = environ; *var != NULL; var++)
|
|
environ_put(&global_environ, *var);
|
|
|
|
if (!(flags & IDENTIFY_UTF8)) {
|
|
/*
|
|
* If the user has set whichever of LC_ALL, LC_CTYPE or LANG
|
|
* exist (in that order) to contain UTF-8, it is a safe
|
|
* assumption that either they are using a UTF-8 terminal, or
|
|
* if not they know that output from UTF-8-capable programs may
|
|
* be wrong.
|
|
*/
|
|
if ((s = getenv("LC_ALL")) == NULL) {
|
|
if ((s = getenv("LC_CTYPE")) == NULL)
|
|
s = getenv("LANG");
|
|
}
|
|
if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
|
|
strcasestr(s, "UTF8") != NULL))
|
|
flags |= IDENTIFY_UTF8;
|
|
}
|
|
|
|
options_init(&global_s_options, NULL);
|
|
options_set_number(&global_s_options, "bell-action", BELL_ANY);
|
|
options_set_number(&global_s_options, "buffer-limit", 9);
|
|
options_set_string(&global_s_options, "default-command", "%s", "");
|
|
options_set_string(&global_s_options, "default-terminal", "screen");
|
|
options_set_number(&global_s_options, "display-time", 750);
|
|
options_set_number(&global_s_options, "history-limit", 2000);
|
|
options_set_number(&global_s_options, "lock-after-time", 0);
|
|
options_set_number(&global_s_options, "message-attr", 0);
|
|
options_set_number(&global_s_options, "message-bg", 3);
|
|
options_set_number(&global_s_options, "message-fg", 0);
|
|
options_set_number(&global_s_options, "prefix", '\002');
|
|
options_set_number(&global_s_options, "repeat-time", 500);
|
|
options_set_number(&global_s_options, "set-remain-on-exit", 0);
|
|
options_set_number(&global_s_options, "set-titles", 0);
|
|
options_set_number(&global_s_options, "status", 1);
|
|
options_set_number(&global_s_options, "status-attr", 0);
|
|
options_set_number(&global_s_options, "status-bg", 2);
|
|
options_set_number(&global_s_options, "status-fg", 0);
|
|
options_set_number(&global_s_options, "status-interval", 15);
|
|
options_set_number(&global_s_options, "status-keys", MODEKEY_EMACS);
|
|
options_set_number(&global_s_options, "status-justify", 0);
|
|
options_set_string(&global_s_options, "status-left", "[#S]");
|
|
options_set_number(&global_s_options, "status-left-attr", 0);
|
|
options_set_number(&global_s_options, "status-left-fg", 8);
|
|
options_set_number(&global_s_options, "status-left-bg", 8);
|
|
options_set_number(&global_s_options, "status-left-length", 10);
|
|
options_set_string(
|
|
&global_s_options, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
|
|
options_set_number(&global_s_options, "status-right-attr", 0);
|
|
options_set_number(&global_s_options, "status-right-fg", 8);
|
|
options_set_number(&global_s_options, "status-right-bg", 8);
|
|
options_set_number(&global_s_options, "status-right-length", 40);
|
|
if (flags & IDENTIFY_UTF8)
|
|
options_set_number(&global_s_options, "status-utf8", 1);
|
|
else
|
|
options_set_number(&global_s_options, "status-utf8", 0);
|
|
options_set_string(&global_s_options,
|
|
"terminal-overrides", "*88col*:colors=88,*256col*:colors=256");
|
|
options_set_string(&global_s_options, "update-environment", "DISPLAY");
|
|
options_set_number(&global_s_options, "visual-activity", 0);
|
|
options_set_number(&global_s_options, "visual-bell", 0);
|
|
options_set_number(&global_s_options, "visual-content", 0);
|
|
|
|
options_init(&global_w_options, NULL);
|
|
options_set_number(&global_w_options, "aggressive-resize", 0);
|
|
options_set_number(&global_w_options, "automatic-rename", 1);
|
|
options_set_number(&global_w_options, "clock-mode-colour", 4);
|
|
options_set_number(&global_w_options, "clock-mode-style", 1);
|
|
options_set_number(&global_w_options, "force-height", 0);
|
|
options_set_number(&global_w_options, "force-width", 0);
|
|
options_set_number(&global_w_options, "main-pane-width", 81);
|
|
options_set_number(&global_w_options, "main-pane-height", 24);
|
|
options_set_number(&global_w_options, "mode-attr", 0);
|
|
options_set_number(&global_w_options, "mode-bg", 3);
|
|
options_set_number(&global_w_options, "mode-fg", 0);
|
|
options_set_number(&global_w_options, "mode-keys", MODEKEY_EMACS);
|
|
options_set_number(&global_w_options, "mode-mouse", 1);
|
|
options_set_number(&global_w_options, "monitor-activity", 0);
|
|
options_set_string(&global_w_options, "monitor-content", "%s", "");
|
|
if (flags & IDENTIFY_UTF8)
|
|
options_set_number(&global_w_options, "utf8", 1);
|
|
else
|
|
options_set_number(&global_w_options, "utf8", 0);
|
|
options_set_number(&global_w_options, "window-status-attr", 0);
|
|
options_set_number(&global_w_options, "window-status-bg", 8);
|
|
options_set_number(&global_w_options, "window-status-fg", 8);
|
|
options_set_number(&global_w_options, "window-status-current-attr", 0);
|
|
options_set_number(&global_w_options, "window-status-current-bg", 8);
|
|
options_set_number(&global_w_options, "window-status-current-fg", 8);
|
|
options_set_number(&global_w_options, "xterm-keys", 0);
|
|
options_set_number(&global_w_options, "remain-on-exit", 0);
|
|
|
|
if (cfg_file == NULL) {
|
|
home = getenv("HOME");
|
|
if (home == NULL || *home == '\0') {
|
|
pw = getpwuid(getuid());
|
|
if (pw != NULL)
|
|
home = pw->pw_dir;
|
|
}
|
|
xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
|
|
if (access(cfg_file, R_OK) != 0) {
|
|
xfree(cfg_file);
|
|
cfg_file = NULL;
|
|
}
|
|
} else {
|
|
if (access(cfg_file, R_OK) != 0) {
|
|
log_warn("%s", cfg_file);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (label == NULL)
|
|
label = xstrdup("default");
|
|
if (path == NULL && (path = makesockpath(label)) == NULL) {
|
|
log_warn("can't create socket");
|
|
exit(1);
|
|
}
|
|
xfree(label);
|
|
|
|
if (getcwd(cwd, sizeof cwd) == NULL) {
|
|
pw = getpwuid(getuid());
|
|
if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
|
|
strlcpy(cwd, pw->pw_dir, sizeof cwd);
|
|
else
|
|
strlcpy(cwd, "/", sizeof cwd);
|
|
}
|
|
options_set_string(&global_s_options, "default-path", "%s", cwd);
|
|
|
|
if (unlock) {
|
|
if (prepare_unlock(&msg, &buf, &len, argc) != 0)
|
|
exit(1);
|
|
} else {
|
|
if (prepare_cmd(&msg, &buf, &len, argc, argv) != 0)
|
|
exit(1);
|
|
}
|
|
|
|
if (unlock)
|
|
cmdflags &= ~CMD_STARTSERVER;
|
|
else if (argc == 0)
|
|
cmdflags |= CMD_STARTSERVER;
|
|
else {
|
|
/*
|
|
* It sucks parsing the command string twice (in client and
|
|
* later in server) but it is necessary to get the start server
|
|
* flag.
|
|
*/
|
|
if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
|
|
log_warnx("%s", cause);
|
|
exit(1);
|
|
}
|
|
cmdflags &= ~CMD_STARTSERVER;
|
|
TAILQ_FOREACH(cmd, cmdlist, qentry) {
|
|
if (cmd->entry->flags & CMD_STARTSERVER)
|
|
cmdflags |= CMD_STARTSERVER;
|
|
if (cmd->entry->flags & CMD_SENDENVIRON)
|
|
cmdflags |= CMD_SENDENVIRON;
|
|
}
|
|
cmd_list_free(cmdlist);
|
|
}
|
|
|
|
memset(&cctx, 0, sizeof cctx);
|
|
if (client_init(path, &cctx, cmdflags, flags) != 0)
|
|
exit(1);
|
|
xfree(path);
|
|
|
|
client_write_server(&cctx, msg, buf, len);
|
|
memset(buf, 0, len);
|
|
|
|
retcode = 0;
|
|
for (;;) {
|
|
pfd.fd = cctx.srv_fd;
|
|
pfd.events = POLLIN;
|
|
if (BUFFER_USED(cctx.srv_out) > 0)
|
|
pfd.events |= POLLOUT;
|
|
|
|
if (poll(&pfd, 1, INFTIM) == -1) {
|
|
if (errno == EAGAIN || errno == EINTR)
|
|
continue;
|
|
fatal("poll failed");
|
|
}
|
|
|
|
if (buffer_poll(&pfd, cctx.srv_in, cctx.srv_out) != 0)
|
|
goto out;
|
|
|
|
restart:
|
|
if (BUFFER_USED(cctx.srv_in) < sizeof hdr)
|
|
continue;
|
|
memcpy(&hdr, BUFFER_OUT(cctx.srv_in), sizeof hdr);
|
|
if (BUFFER_USED(cctx.srv_in) < (sizeof hdr) + hdr.size)
|
|
continue;
|
|
buffer_remove(cctx.srv_in, sizeof hdr);
|
|
|
|
switch (hdr.type) {
|
|
case MSG_EXIT:
|
|
case MSG_SHUTDOWN:
|
|
goto out;
|
|
case MSG_ERROR:
|
|
retcode = 1;
|
|
/* FALLTHROUGH */
|
|
case MSG_PRINT:
|
|
if (hdr.size < sizeof printdata)
|
|
fatalx("bad MSG_PRINT size");
|
|
buffer_read(cctx.srv_in, &printdata, sizeof printdata);
|
|
|
|
printdata.msg[(sizeof printdata.msg) - 1] = '\0';
|
|
log_info("%s", printdata.msg);
|
|
goto restart;
|
|
case MSG_READY:
|
|
retcode = client_main(&cctx);
|
|
goto out;
|
|
default:
|
|
fatalx("unexpected command");
|
|
}
|
|
}
|
|
|
|
out:
|
|
options_free(&global_s_options);
|
|
options_free(&global_w_options);
|
|
|
|
close(cctx.srv_fd);
|
|
buffer_destroy(cctx.srv_in);
|
|
buffer_destroy(cctx.srv_out);
|
|
|
|
return (retcode);
|
|
}
|