mirror of
https://github.com/tmate-io/tmate.git
synced 2024-11-24 00:53:31 +01:00
314 lines
6.8 KiB
C
314 lines
6.8 KiB
C
/* $Id: tmux.c,v 1.38 2007-10-24 11:42:03 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 <err.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
|
|
const char *malloc_options = "AFGJPX";
|
|
#endif
|
|
|
|
volatile sig_atomic_t sigwinch;
|
|
volatile sig_atomic_t sigterm;
|
|
int debug_level;
|
|
int prefix_key = META;
|
|
u_int status_lines;
|
|
u_char status_colour;
|
|
char *default_command;
|
|
int bell_action;
|
|
|
|
void sighandler(int);
|
|
|
|
void
|
|
usage(char **ptr, const char *fmt, ...)
|
|
{
|
|
char *msg;
|
|
va_list ap;
|
|
|
|
if (fmt == NULL) {
|
|
xasprintf(ptr,
|
|
"usage: %s [-v] [-S path] command [flags]", __progname);
|
|
} else {
|
|
va_start(ap, fmt);
|
|
xvasprintf(&msg, fmt, ap);
|
|
va_end(ap);
|
|
|
|
xasprintf(ptr, "usage: %s [-v] [-S path] %s", __progname, msg);
|
|
xfree(msg);
|
|
}
|
|
}
|
|
|
|
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 *path, *cause, *name;
|
|
int n, opt;
|
|
|
|
path = name = NULL;
|
|
while ((opt = getopt(argc, argv, "S:s:v")) != EOF) {
|
|
switch (opt) {
|
|
case 'S':
|
|
path = xstrdup(optarg);
|
|
break;
|
|
case 's':
|
|
name = xstrdup(optarg);
|
|
break;
|
|
case 'v':
|
|
debug_level++;
|
|
break;
|
|
default:
|
|
goto usage;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc == 0)
|
|
goto usage;
|
|
|
|
log_open(stderr, LOG_USER, debug_level);
|
|
siginit();
|
|
|
|
status_lines = 1;
|
|
status_colour = 0x02;
|
|
|
|
bell_action = BELL_ANY;
|
|
|
|
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;
|
|
}
|
|
xasprintf(&default_command, "exec %s", shell);
|
|
|
|
if ((cmd = cmd_parse(argc, argv, &cause)) == NULL) {
|
|
if (cause == NULL)
|
|
goto usage;
|
|
log_warnx("%s", cause);
|
|
exit(1);
|
|
}
|
|
|
|
memset(&cctx, 0, sizeof cctx);
|
|
if (!(cmd->entry->flags & CMD_NOSESSION) ||
|
|
(cmd->entry->flags & CMD_CANTNEST))
|
|
client_fill_session(&data);
|
|
if (client_init(path, &cctx, cmd->entry->flags & CMD_STARTSERVER) != 0)
|
|
exit(1);
|
|
b = buffer_create(BUFSIZ);
|
|
cmd_send_string(b, name);
|
|
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);
|
|
|
|
if (path != NULL)
|
|
xfree(path);
|
|
if (name != NULL)
|
|
xfree(name);
|
|
|
|
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:
|
|
xfree(default_command);
|
|
|
|
close(cctx.srv_fd);
|
|
buffer_destroy(cctx.srv_in);
|
|
buffer_destroy(cctx.srv_out);
|
|
|
|
#ifdef DEBUG
|
|
xmalloc_report(getpid(), "client");
|
|
#endif
|
|
return (n);
|
|
|
|
usage:
|
|
usage(&cause, NULL);
|
|
fprintf(stderr, "%s\n", cause);
|
|
exit(1);
|
|
}
|