tmux/tmux.c
Nicholas Marriott 86504af149 Rename the global options variables to be shorter and to make session options
clear. No functional change, getting this out of the way to make later options
changes easier.
2009-07-08 18:01:31 +00:00

489 lines
12 KiB
C

/* $OpenBSD: tmux.c,v 1.12 2009/07/07 19:49:19 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/stat.h>
#include <errno.h>
#include <pwd.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "tmux.h"
#ifdef DEBUG
/* DragonFly uses an OpenBSD-like malloc() since 1.6 */
#if defined(__OpenBSD__) || defined(__DragonFly__)
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;
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 */
int server_locked;
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 *);
#ifndef HAVE_PROGNAME
const char *__progname = "tmux";
#endif
__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
main(int argc, char **argv)
{
struct client_ctx cctx;
struct msg_command_data cmddata;
struct buffer *b;
struct cmd_list *cmdlist;
struct cmd *cmd;
struct pollfd pfd;
struct hdr hdr;
struct passwd *pw;
char *s, *path, *label, *cause, *home, *pass = NULL;
char cwd[MAXPATHLEN];
int retcode, opt, flags, unlock, start_server;
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();
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_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", GRID_ATTR_REVERSE);
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", GRID_ATTR_REVERSE);
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-left-length", 10);
options_set_number(&global_s_options, "status-right-length", 40);
options_set_string(&global_s_options, "status-left", "[#S]");
options_set_string(
&global_s_options, "status-right", "\"#24T\" %%H:%%M %%d-%%b-%%y");
options_set_number(&global_s_options, "status-utf8", 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, "mode-attr", GRID_ATTR_REVERSE);
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-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, "monitor-activity", 0);
options_set_string(&global_w_options, "monitor-content", "%s", "");
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, "xterm-keys", 0);
options_set_number(&global_w_options, "remain-on-exit", 0);
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)
flags |= IDENTIFY_UTF8;
}
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 (argc != 0) {
log_warnx("can't specify a command when unlocking");
exit(1);
}
cmdlist = NULL;
if ((pass = getpass("Password: ")) == NULL)
exit(1);
start_server = 0;
} else {
if (argc == 0) {
cmd = xmalloc(sizeof *cmd);
cmd->entry = &cmd_new_session_entry;
cmd->entry->init(cmd, 0);
cmdlist = xmalloc(sizeof *cmdlist);
TAILQ_INIT(cmdlist);
TAILQ_INSERT_HEAD(cmdlist, cmd, qentry);
} else {
cmdlist = cmd_list_parse(argc, argv, &cause);
if (cmdlist == NULL) {
log_warnx("%s", cause);
exit(1);
}
}
start_server = 0;
TAILQ_FOREACH(cmd, cmdlist, qentry) {
if (cmd->entry->flags & CMD_STARTSERVER) {
start_server = 1;
break;
}
}
}
memset(&cctx, 0, sizeof cctx);
if (client_init(path, &cctx, start_server, flags) != 0)
exit(1);
xfree(path);
b = buffer_create(BUFSIZ);
if (unlock) {
cmd_send_string(b, pass);
memset(pass, 0, strlen(pass));
client_write_server(
&cctx, MSG_UNLOCK, BUFFER_OUT(b), BUFFER_USED(b));
} else {
cmd_list_send(cmdlist, b);
cmd_list_free(cmdlist);
client_fill_session(&cmddata);
client_write_server2(&cctx, MSG_COMMAND,
&cmddata, sizeof cmddata, BUFFER_OUT(b), BUFFER_USED(b));
}
buffer_destroy(b);
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 > INT_MAX - 1)
fatalx("bad MSG_PRINT size");
log_info("%.*s",
(int) hdr.size, BUFFER_OUT(cctx.srv_in));
if (hdr.size != 0)
buffer_remove(cctx.srv_in, hdr.size);
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);
}