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Pass the stdout file descriptor from the client as well as stdin and use

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them for control clients directly instead of passing everything via the
client.
This commit is contained in:
nicm 2020-05-26 08:41:47 +00:00
parent 6f03e49e68
commit ea610a3119
5 changed files with 91 additions and 35 deletions
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5
client.c
View File

@ -402,6 +402,8 @@ client_main(struct event_base *base, int argc, char **argv, int flags, int feat)
} else if (client_exitreason != CLIENT_EXIT_NONE)
fprintf(stderr, "%s\n", client_exit_message());
setblocking(STDIN_FILENO, 1);
setblocking(STDOUT_FILENO, 1);
setblocking(STDERR_FILENO, 1);
return (client_exitval);
}
@ -429,6 +431,9 @@ client_send_identify(const char *ttynam, const char *cwd, int feat)
if ((fd = dup(STDIN_FILENO)) == -1)
fatal("dup failed");
proc_send(client_peer, MSG_IDENTIFY_STDIN, fd, NULL, 0);
if ((fd = dup(STDOUT_FILENO)) == -1)
fatal("dup failed");
proc_send(client_peer, MSG_IDENTIFY_STDOUT, fd, NULL, 0);
pid = getpid();
proc_send(client_peer, MSG_IDENTIFY_CLIENTPID, -1, &pid, sizeof pid);

81
control.c
View File

@ -23,10 +23,11 @@
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
/* Control offsets. */
/* Control client offset. */
struct control_offset {
u_int pane;
@ -34,13 +35,16 @@ struct control_offset {
int flags;
#define CONTROL_OFFSET_OFF 0x1
RB_ENTRY(control_offset) entry;
RB_ENTRY(control_offset) entry;
};
RB_HEAD(control_offsets, control_offset);
/* Control state. */
/* Control client state. */
struct control_state {
struct control_offsets offsets;
struct control_offsets offsets;
struct bufferevent *read_event;
struct bufferevent *write_event;
};
/* Compare client offsets. */
@ -146,18 +150,24 @@ control_set_pane_off(struct client *c, struct window_pane *wp)
void
control_write(struct client *c, const char *fmt, ...)
{
va_list ap;
struct control_state *cs = c->control_state;
va_list ap;
char *s;
va_start(ap, fmt);
file_vprint(c, fmt, ap);
file_print(c, "\n");
xvasprintf(&s, fmt, ap);
va_end(ap);
bufferevent_write(cs->write_event, s, strlen(s));
bufferevent_write(cs->write_event, "\n", 1);
free(s);
}
/* Write output from a pane. */
void
control_write_output(struct client *c, struct window_pane *wp)
{
struct control_state *cs = c->control_state;
struct control_offset *co;
struct evbuffer *message;
u_char *new_data;
@ -165,11 +175,6 @@ control_write_output(struct client *c, struct window_pane *wp)
if (c->flags & CLIENT_CONTROL_NOOUTPUT)
return;
/*
* Only write input if the window pane is linked to a window belonging
* to the client's session.
*/
if (winlink_find_by_window(&c->session->windows, wp->window) == NULL)
return;
@ -193,15 +198,15 @@ control_write_output(struct client *c, struct window_pane *wp)
else
evbuffer_add_printf(message, "%c", new_data[i]);
}
evbuffer_add(message, "", 1);
evbuffer_add(message, "\n", 1);
control_write(c, "%s", EVBUFFER_DATA(message));
bufferevent_write_buffer(cs->write_event, message);
evbuffer_free(message);
window_pane_update_used_data(wp, &co->offset, new_size, 1);
}
/* Control error callback. */
/* Control client error callback. */
static enum cmd_retval
control_error(struct cmdq_item *item, void *data)
{
@ -216,18 +221,27 @@ control_error(struct cmdq_item *item, void *data)
return (CMD_RETURN_NORMAL);
}
/* Control input callback. Read lines and fire commands. */
/* Control client error callback. */
static void
control_callback(__unused struct client *c, __unused const char *path,
int read_error, int closed, struct evbuffer *buffer, __unused void *data)
control_error_callback(__unused struct bufferevent *bufev,
__unused short what, void *data)
{
struct client *c = data;
c->flags |= CLIENT_EXIT;
}
/* Control client input callback. Read lines and fire commands. */
static void
control_read_callback(__unused struct bufferevent *bufev, void *data)
{
struct client *c = data;
struct control_state *cs = c->control_state;
struct evbuffer *buffer = cs->read_event->input;
char *line, *error;
struct cmdq_state *state;
enum cmd_parse_status status;
if (closed || read_error != 0)
c->flags |= CLIENT_EXIT;
for (;;) {
line = evbuffer_readln(buffer, NULL, EVBUFFER_EOL_LF);
if (line == NULL)
@ -255,13 +269,30 @@ control_start(struct client *c)
{
struct control_state *cs;
if (c->flags & CLIENT_CONTROLCONTROL) {
close(c->out_fd);
c->out_fd = -1;
} else
setblocking(c->out_fd, 0);
setblocking(c->fd, 0);
cs = c->control_state = xcalloc(1, sizeof *cs);
RB_INIT(&cs->offsets);
file_read(c, "-", control_callback, c);
cs->read_event = bufferevent_new(c->fd, control_read_callback, NULL,
control_error_callback, c);
bufferevent_enable(cs->read_event, EV_READ);
if (c->flags & CLIENT_CONTROLCONTROL)
file_print(c, "\033P1000p");
cs->write_event = cs->read_event;
else {
cs->write_event = bufferevent_new(c->out_fd, NULL, NULL,
control_error_callback, c);
}
bufferevent_enable(cs->write_event, EV_WRITE);
if (c->flags & CLIENT_CONTROLCONTROL)
control_write(c, "\033P1000p");
}
/* Stop control mode. */
@ -270,6 +301,10 @@ control_stop(struct client *c)
{
struct control_state *cs = c->control_state;
if (~c->flags & CLIENT_CONTROLCONTROL)
bufferevent_free(cs->write_event);
bufferevent_free(cs->read_event);
control_free_offsets(c);
free(cs);
}

8
file.c
View File

@ -242,7 +242,9 @@ file_write(struct client *c, const char *path, int flags, const void *bdata,
cf->path = xstrdup("-");
fd = STDOUT_FILENO;
if (c == NULL || c->flags & CLIENT_ATTACHED) {
if (c == NULL ||
(c->flags & CLIENT_ATTACHED) ||
(c->flags & CLIENT_CONTROL)) {
cf->error = EBADF;
goto done;
}
@ -311,7 +313,9 @@ file_read(struct client *c, const char *path, client_file_cb cb, void *cbdata)
cf->path = xstrdup("-");
fd = STDIN_FILENO;
if (c == NULL || c->flags & CLIENT_ATTACHED) {
if (c == NULL ||
(c->flags & CLIENT_ATTACHED) ||
(c->flags & CLIENT_CONTROL)) {
cf->error = EBADF;
goto done;
}

29
server-client.c
View File

@ -223,7 +223,7 @@ server_client_create(int fd)
c->environ = environ_create();
c->fd = -1;
c->cwd = NULL;
c->out_fd = -1;
c->queue = cmdq_new();
RB_INIT(&c->windows);
@ -338,6 +338,8 @@ server_client_lost(struct client *c)
proc_remove_peer(c->peer);
c->peer = NULL;
if (c->out_fd != -1)
close(c->out_fd);
if (c->fd != -1) {
close(c->fd);
c->fd = -1;
@ -1573,10 +1575,9 @@ server_client_check_pane_buffer(struct window_pane *wp)
out:
/*
* If there is data remaining, and there are no clients able to consume
* it, do not read any more. This is true when 1) there are attached
* clients 2) all the clients are control clients 3) all of them have
* either the OFF flag set, or are otherwise not able to accept any
* more data for this pane.
* it, do not read any more. This is true when there are attached
* clients, all of which are control clients which are not able to
* accept any more data.
*/
if (off)
bufferevent_disable(wp->event, EV_READ);
@ -1969,6 +1970,7 @@ server_client_dispatch(struct imsg *imsg, void *arg)
case MSG_IDENTIFY_TTYNAME:
case MSG_IDENTIFY_CWD:
case MSG_IDENTIFY_STDIN:
case MSG_IDENTIFY_STDOUT:
case MSG_IDENTIFY_ENVIRON:
case MSG_IDENTIFY_CLIENTPID:
case MSG_IDENTIFY_DONE:
@ -2179,6 +2181,12 @@ server_client_dispatch_identify(struct client *c, struct imsg *imsg)
c->fd = imsg->fd;
log_debug("client %p IDENTIFY_STDIN %d", c, imsg->fd);
break;
case MSG_IDENTIFY_STDOUT:
if (datalen != 0)
fatalx("bad MSG_IDENTIFY_STDOUT size");
c->out_fd = imsg->fd;
log_debug("client %p IDENTIFY_STDOUT %d", c, imsg->fd);
break;
case MSG_IDENTIFY_ENVIRON:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_ENVIRON string");
@ -2207,11 +2215,9 @@ server_client_dispatch_identify(struct client *c, struct imsg *imsg)
c->name = name;
log_debug("client %p name is %s", c, c->name);
if (c->flags & CLIENT_CONTROL) {
close(c->fd);
c->fd = -1;
if (c->flags & CLIENT_CONTROL)
control_start(c);
} else if (c->fd != -1) {
else if (c->fd != -1) {
if (tty_init(&c->tty, c) != 0) {
close(c->fd);
c->fd = -1;
@ -2219,6 +2225,8 @@ server_client_dispatch_identify(struct client *c, struct imsg *imsg)
tty_resize(&c->tty);
c->flags |= CLIENT_TERMINAL;
}
close(c->out_fd);
c->out_fd = -1;
}
/*
@ -2335,7 +2343,8 @@ void
server_client_set_flags(struct client *c, const char *flags)
{
char *s, *copy, *next;
int flag, not;
uint64_t flag;
int not;
s = copy = xstrdup (flags);
while ((next = strsep(&s, ",")) != NULL) {

3
tmux.h
View File

@ -498,6 +498,7 @@ enum msgtype {
MSG_IDENTIFY_CLIENTPID,
MSG_IDENTIFY_CWD,
MSG_IDENTIFY_FEATURES,
MSG_IDENTIFY_STDOUT,
MSG_COMMAND = 200,
MSG_DETACH,
@ -967,6 +968,7 @@ struct window_pane {
int fd;
struct bufferevent *event;
struct window_pane_offset offset;
size_t base_offset;
@ -1581,6 +1583,7 @@ struct client {
pid_t pid;
int fd;
int out_fd;
struct event event;
int retval;