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Add a command queue to standardize and simplify commands that call other

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commands and allow a command to block execution of subsequent commands. This
allows run-shell and if-shell to be synchronous which has been much requested.

Each client has a default command queue and commands are consumed one at a time
from it. A command may suspend execution from the queue by returning
CMD_RETURN_WAIT and then resume it by calling cmd_continue() - for example
run-shell does this from the callback that is fired after the job is freed.

When the command queue becomes empty, command clients are automatically exited
(unless attaching). A callback is also fired - this is used for nested commands
in, for example, if-shell which can block execution of the client's cmdq until
a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the old
curclient/cmdclient distinction - a cmdq is bound to one client (or none if in
the configuration file), this is a command client if c->session is NULL
otherwise an attached client.
This commit is contained in:
Nicholas Marriott
2013-02-23 22:25:58 +00:00
parent 357da035b9
commit 3964309c67
86 changed files with 1218 additions and 1219 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
cmd-attach-session.c
View File

@@ -26,7 +26,7 @@
* Attach existing session to the current terminal.
*/
enum cmd_retval cmd_attach_session_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_attach_session_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_attach_session_entry = {
"attach-session", "attach",
@@ -39,7 +39,7 @@ const struct cmd_entry cmd_attach_session_entry = {
};
enum cmd_retval
cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
cmd_attach_session_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct session *s;
@@ -49,17 +49,17 @@ cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
u_int i;
if (RB_EMPTY(&sessions)) {
ctx->error(ctx, "no sessions");
cmdq_error(cmdq, "no sessions");
return (CMD_RETURN_ERROR);
}
if ((s = cmd_find_session(ctx, args_get(args, 't'), 1)) == NULL)
if ((s = cmd_find_session(cmdq, args_get(args, 't'), 1)) == NULL)
return (CMD_RETURN_ERROR);
if (ctx->cmdclient == NULL && ctx->curclient == NULL)
if (cmdq->client == NULL)
return (CMD_RETURN_NORMAL);
if (ctx->cmdclient == NULL) {
if (cmdq->client->session != NULL) {
if (args_has(self->args, 'd')) {
/*
* Can't use server_write_session in case attaching to
@@ -69,43 +69,44 @@ cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
if (c == ctx->curclient)
if (c == cmdq->client)
continue;
server_write_client(c, MSG_DETACH, NULL, 0);
}
}
ctx->curclient->session = s;
notify_attached_session_changed(ctx->curclient);
cmdq->client->session = s;
notify_attached_session_changed(cmdq->client);
session_update_activity(s);
server_redraw_client(ctx->curclient);
server_redraw_client(cmdq->client);
s->curw->flags &= ~WINLINK_ALERTFLAGS;
} else {
if (server_client_open(ctx->cmdclient, s, &cause) != 0) {
ctx->error(ctx, "open terminal failed: %s", cause);
if (server_client_open(cmdq->client, s, &cause) != 0) {
cmdq_error(cmdq, "open terminal failed: %s", cause);
free(cause);
return (CMD_RETURN_ERROR);
}
if (args_has(self->args, 'r'))
ctx->cmdclient->flags |= CLIENT_READONLY;
cmdq->client->flags |= CLIENT_READONLY;
if (args_has(self->args, 'd'))
server_write_session(s, MSG_DETACH, NULL, 0);
ctx->cmdclient->session = s;
notify_attached_session_changed(ctx->cmdclient);
session_update_activity(s);
server_write_ready(ctx->cmdclient);
update = options_get_string(&s->options, "update-environment");
environ_update(update, &ctx->cmdclient->environ, &s->environ);
environ_update(update, &cmdq->client->environ, &s->environ);
server_redraw_client(ctx->cmdclient);
cmdq->client->session = s;
notify_attached_session_changed(cmdq->client);
session_update_activity(s);
server_redraw_client(cmdq->client);
s->curw->flags &= ~WINLINK_ALERTFLAGS;
server_write_ready(cmdq->client);
cmdq->client_exit = 0;
}
recalculate_sizes();
server_update_socket();
return (CMD_RETURN_ATTACH);
return (CMD_RETURN_NORMAL);
}