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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
2013-03-24 09:54:10 +00:00
parent 66edb3392b
commit 20636d956d
84 changed files with 1240 additions and 1187 deletions
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12
cmd-pipe-pane.c
View File

@ -32,7 +32,7 @@
* Open pipe to redirect pane output. If already open, close first.
*/
enum cmd_retval cmd_pipe_pane_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_pipe_pane_exec(struct cmd *, struct cmd_q *);
void cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
@ -47,7 +47,7 @@ const struct cmd_entry cmd_pipe_pane_entry = {
};
enum cmd_retval
cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
cmd_pipe_pane_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct client *c;
@ -55,9 +55,9 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
char *command;
int old_fd, pipe_fd[2], null_fd;
if (cmd_find_pane(ctx, args_get(args, 't'), NULL, &wp) == NULL)
if (cmd_find_pane(cmdq, args_get(args, 't'), NULL, &wp) == NULL)
return (CMD_RETURN_ERROR);
c = cmd_find_client(ctx, NULL, 1);
c = cmd_find_client(cmdq, NULL, 1);
/* Destroy the old pipe. */
old_fd = wp->pipe_fd;
@ -82,14 +82,14 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
/* Open the new pipe. */
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_fd) != 0) {
ctx->error(ctx, "socketpair error: %s", strerror(errno));
cmdq_error(cmdq, "socketpair error: %s", strerror(errno));
return (CMD_RETURN_ERROR);
}
/* Fork the child. */
switch (fork()) {
case -1:
ctx->error(ctx, "fork error: %s", strerror(errno));
cmdq_error(cmdq, "fork error: %s", strerror(errno));
return (CMD_RETURN_ERROR);
case 0:
/* Child process. */