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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
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16
cmd-set-environment.c
View File

@@ -27,7 +27,7 @@
* Set an environment variable.
*/
enum cmd_retval cmd_set_environment_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_set_environment_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_set_environment_entry = {
"set-environment", "setenv",
@@ -40,7 +40,7 @@ const struct cmd_entry cmd_set_environment_entry = {
};
enum cmd_retval
cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
cmd_set_environment_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct session *s;
@@ -49,11 +49,11 @@ cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
name = args->argv[0];
if (*name == '\0') {
ctx->error(ctx, "empty variable name");
cmdq_error(cmdq, "empty variable name");
return (CMD_RETURN_ERROR);
}
if (strchr(name, '=') != NULL) {
ctx->error(ctx, "variable name contains =");
cmdq_error(cmdq, "variable name contains =");
return (CMD_RETURN_ERROR);
}
@@ -65,26 +65,26 @@ cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
if (args_has(self->args, 'g'))
env = &global_environ;
else {
if ((s = cmd_find_session(ctx, args_get(args, 't'), 0)) == NULL)
if ((s = cmd_find_session(cmdq, args_get(args, 't'), 0)) == NULL)
return (CMD_RETURN_ERROR);
env = &s->environ;
}
if (args_has(self->args, 'u')) {
if (value != NULL) {
ctx->error(ctx, "can't specify a value with -u");
cmdq_error(cmdq, "can't specify a value with -u");
return (CMD_RETURN_ERROR);
}
environ_unset(env, name);
} else if (args_has(self->args, 'r')) {
if (value != NULL) {
ctx->error(ctx, "can't specify a value with -r");
cmdq_error(cmdq, "can't specify a value with -r");
return (CMD_RETURN_ERROR);
}
environ_set(env, name, NULL);
} else {
if (value == NULL) {
ctx->error(ctx, "no value specified");
cmdq_error(cmdq, "no value specified");
return (CMD_RETURN_ERROR);
}
environ_set(env, name, value);