mirror of
https://github.com/tmate-io/tmate.git
synced 2024-11-09 01:35:20 +01:00
350 lines
8.1 KiB
C
350 lines
8.1 KiB
C
/* $Id: tmux.c,v 1.52 2008-06-04 05:40:35 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/wait.h>
|
|
|
|
#include <errno.h>
|
|
#include <paths.h>
|
|
#include <poll.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
#ifdef DEBUG
|
|
#ifdef __OpenBSD__
|
|
const char *malloc_options = "AFGJPX";
|
|
#endif
|
|
#ifdef __FreeBSD__
|
|
const char *_malloc_options = "AJX";
|
|
#endif
|
|
#endif
|
|
|
|
volatile sig_atomic_t sigwinch;
|
|
volatile sig_atomic_t sigterm;
|
|
|
|
char *cfg_file;
|
|
struct options global_options;
|
|
char *paste_buffer;
|
|
|
|
int debug_level;
|
|
|
|
void sighandler(int);
|
|
__dead void usage(void);
|
|
|
|
__dead void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [-v] [-f file] [-S socket-path] [command [flags]]\n",
|
|
__progname);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
logfile(const char *name)
|
|
{
|
|
FILE *f;
|
|
char *path;
|
|
|
|
log_close();
|
|
if (debug_level > 0) {
|
|
xasprintf(
|
|
&path, "%s-%s-%ld.log", __progname, name, (long) getpid());
|
|
f = fopen(path, "w");
|
|
log_open(f, LOG_DAEMON, debug_level);
|
|
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:
|
|
waitpid(WAIT_ANY, NULL, WNOHANG);
|
|
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(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");
|
|
|
|
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");
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct client_ctx cctx;
|
|
struct msg_command_data data;
|
|
struct buffer *b;
|
|
struct cmd *cmd;
|
|
struct pollfd pfd;
|
|
struct hdr hdr;
|
|
const char *shell;
|
|
struct passwd *pw;
|
|
char *client, *path, *name, *cause, *home;
|
|
char rpath[MAXPATHLEN];
|
|
int n, opt;
|
|
|
|
client = path = name = NULL;
|
|
while ((opt = getopt(argc, argv, "c:f:S:s:vV")) != EOF) {
|
|
switch (opt) {
|
|
case 'f':
|
|
cfg_file = xstrdup(optarg);
|
|
break;
|
|
case 'S':
|
|
path = xstrdup(optarg);
|
|
break;
|
|
case 'v':
|
|
debug_level++;
|
|
break;
|
|
case 'V':
|
|
printf("%s " BUILD "\n", __progname);
|
|
exit(0);
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
log_open(stderr, LOG_USER, debug_level);
|
|
siginit();
|
|
|
|
options_init(&global_options, NULL);
|
|
options_set_number(&global_options, "status-lines", 1);
|
|
options_set_number(&global_options, "status-colour", 0x02);
|
|
options_set_number(&global_options, "bell-action", BELL_ANY);
|
|
options_set_number(&global_options, "history-limit", 2000);
|
|
options_set_number(&global_options, "prefix-key", META);
|
|
options_set_string(&global_options, "status-left", "");
|
|
options_set_string(
|
|
&global_options, "status-right", "%%H:%%M %%d-%%b-%%y");
|
|
options_set_number(&global_options, "status-interval", 15);
|
|
|
|
paste_buffer = NULL;
|
|
|
|
if (cfg_file == NULL) {
|
|
home = getenv("HOME");
|
|
if (home == NULL || *home == '\0') {
|
|
pw = getpwuid(getuid());
|
|
if (pw != NULL)
|
|
home = pw->pw_dir;
|
|
endpwent();
|
|
}
|
|
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 (path == NULL) {
|
|
xasprintf(&path,
|
|
"%s/%s-%lu", _PATH_TMP, __progname, (u_long) getuid());
|
|
}
|
|
if (realpath(path, rpath) == NULL) {
|
|
if (errno != ENOENT) {
|
|
log_warn("%s", path);
|
|
exit(1);
|
|
}
|
|
/*
|
|
* Linux appears to fill in the buffer fine but then returns
|
|
* ENOENT if the file doesn't exist. But since it returns an
|
|
* error, we can't rely on the buffer. Grr.
|
|
*/
|
|
if (strlcpy(rpath, path, sizeof rpath) >= sizeof rpath) {
|
|
log_warnx("%s: %s", path, strerror(ENAMETOOLONG));
|
|
exit(1);
|
|
}
|
|
}
|
|
xfree(path);
|
|
|
|
shell = getenv("SHELL");
|
|
if (shell == NULL || *shell == '\0') {
|
|
pw = getpwuid(getuid());
|
|
if (pw != NULL)
|
|
shell = pw->pw_shell;
|
|
endpwent();
|
|
if (shell == NULL || *shell == '\0')
|
|
shell = _PATH_BSHELL;
|
|
}
|
|
options_set_string(
|
|
&global_options, "default-command", "exec %s", shell);
|
|
|
|
if (argc == 0) {
|
|
cmd = xmalloc(sizeof *cmd);
|
|
cmd->entry = &cmd_new_session_entry;
|
|
cmd->entry->init(&cmd->data, 0);
|
|
} else if ((cmd = cmd_parse(argc, argv, &cause)) == NULL) {
|
|
log_warnx("%s", cause);
|
|
exit(1);
|
|
}
|
|
|
|
memset(&cctx, 0, sizeof cctx);
|
|
client_fill_session(&data);
|
|
if (client_init(rpath, &cctx, cmd->entry->flags & CMD_STARTSERVER) != 0)
|
|
exit(1);
|
|
b = buffer_create(BUFSIZ);
|
|
cmd_send(cmd, b);
|
|
cmd_free(cmd);
|
|
|
|
client_write_server2(&cctx,
|
|
MSG_COMMAND, &data, sizeof data, BUFFER_OUT(b), BUFFER_USED(b));
|
|
buffer_destroy(b);
|
|
|
|
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)
|
|
fatalx("lost server");
|
|
|
|
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:
|
|
n = 0;
|
|
goto out;
|
|
case MSG_PRINT:
|
|
if (hdr.size > INT_MAX - 1)
|
|
fatalx("bad MSG_PRINT size");
|
|
log_info("%.*s",
|
|
(int) hdr.size, BUFFER_OUT(cctx.srv_in));
|
|
buffer_remove(cctx.srv_in, hdr.size);
|
|
goto restart;
|
|
case MSG_ERROR:
|
|
if (hdr.size > INT_MAX - 1)
|
|
fatalx("bad MSG_ERROR size");
|
|
log_warnx("%.*s",
|
|
(int) hdr.size, BUFFER_OUT(cctx.srv_in));
|
|
buffer_remove(cctx.srv_in, hdr.size);
|
|
n = 1;
|
|
goto out;
|
|
case MSG_READY:
|
|
n = client_main(&cctx);
|
|
goto out;
|
|
default:
|
|
fatalx("unexpected command");
|
|
}
|
|
}
|
|
|
|
out:
|
|
options_free(&global_options);
|
|
|
|
close(cctx.srv_fd);
|
|
buffer_destroy(cctx.srv_in);
|
|
buffer_destroy(cctx.srv_out);
|
|
|
|
#ifdef DEBUG
|
|
xmalloc_report(getpid(), "client");
|
|
#endif
|
|
return (n);
|
|
}
|