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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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8
cmd-list-commands.c
View File

@ -24,7 +24,7 @@
* List all commands with usages.
*/
enum cmd_retval cmd_list_commands_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_list_commands_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_list_commands_entry = {
"list-commands", "lscm",
@ -37,16 +37,16 @@ const struct cmd_entry cmd_list_commands_entry = {
};
enum cmd_retval
cmd_list_commands_exec(unused struct cmd *self, struct cmd_ctx *ctx)
cmd_list_commands_exec(unused struct cmd *self, struct cmd_q *cmdq)
{
const struct cmd_entry **entryp;
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if ((*entryp)->alias != NULL) {
ctx->print(ctx, "%s (%s) %s", (*entryp)->name,
cmdq_print(cmdq, "%s (%s) %s", (*entryp)->name,
(*entryp)->alias, (*entryp)->usage);
} else {
ctx->print(ctx, "%s %s", (*entryp)->name,
cmdq_print(cmdq, "%s %s", (*entryp)->name,
(*entryp)->usage);
}
}