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/* $OpenBSD: cmd-queue.c,v 1.16 2014/04/17 07:55:43 nicm Exp $ */
/*
* Copyright (c) 2013 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <ctype.h>
#include <stdlib.h>
#include <time.h>
#include "tmux.h"
/* Create new command queue. */
struct cmd_q *
cmdq_new(struct client *c)
{
struct cmd_q *cmdq;
cmdq = xcalloc(1, sizeof *cmdq);
cmdq->references = 1;
cmdq->dead = 0;
cmdq->client = c;
cmdq->client_exit = -1;
TAILQ_INIT(&cmdq->queue);
cmdq->item = NULL;
cmdq->cmd = NULL;
return (cmdq);
}
/* Free command queue */
int
cmdq_free(struct cmd_q *cmdq)
{
if (--cmdq->references != 0)
return (cmdq->dead);
cmdq_flush(cmdq);
free(cmdq);
return (1);
}
/* Show message from command. */
void printflike2
cmdq_print(struct cmd_q *cmdq, const char *fmt, ...)
{
struct client *c = cmdq->client;
struct window *w;
va_list ap;
va_start(ap, fmt);
if (c == NULL)
/* nothing */;
else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
evbuffer_add_vprintf(c->stdout_data, fmt, ap);
evbuffer_add(c->stdout_data, "\n", 1);
server_push_stdout(c);
} else {
w = c->session->curw->window;
if (w->active->mode != &window_copy_mode) {
window_pane_reset_mode(w->active);
window_pane_set_mode(w->active, &window_copy_mode);
window_copy_init_for_output(w->active);
}
window_copy_vadd(w->active, fmt, ap);
}
va_end(ap);
}
/* Show error from command. */
void printflike2
cmdq_error(struct cmd_q *cmdq, const char *fmt, ...)
{
struct client *c = cmdq->client;
struct cmd *cmd = cmdq->cmd;
va_list ap;
char *msg, *cause;
size_t msglen;
va_start(ap, fmt);
msglen = xvasprintf(&msg, fmt, ap);
va_end(ap);
if (c == NULL) {
xasprintf(&cause, "%s:%u: %s", cmd->file, cmd->line, msg);
ARRAY_ADD(&cfg_causes, cause);
} else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
evbuffer_add(c->stderr_data, msg, msglen);
evbuffer_add(c->stderr_data, "\n", 1);
server_push_stderr(c);
c->retval = 1;
} else {
*msg = toupper((u_char) *msg);
status_message_set(c, "%s", msg);
}
free(msg);
}
/* Print a guard line. */
int
cmdq_guard(struct cmd_q *cmdq, const char *guard, int flags)
{
struct client *c = cmdq->client;
if (c == NULL)
return 0;
if (!(c->flags & CLIENT_CONTROL))
return 0;
evbuffer_add_printf(c->stdout_data, "%%%s %ld %u %d\n", guard,
(long) cmdq->time, cmdq->number, flags);
server_push_stdout(c);
return 1;
}
/* Add command list to queue and begin processing if needed. */
void
cmdq_run(struct cmd_q *cmdq, struct cmd_list *cmdlist)
{
cmdq_append(cmdq, cmdlist);
if (cmdq->item == NULL) {
cmdq->cmd = NULL;
cmdq_continue(cmdq);
}
}
/* Add command list to queue. */
void
cmdq_append(struct cmd_q *cmdq, struct cmd_list *cmdlist)
{
struct cmd_q_item *item;
item = xcalloc(1, sizeof *item);
item->cmdlist = cmdlist;
TAILQ_INSERT_TAIL(&cmdq->queue, item, qentry);
cmdlist->references++;
}
/* Continue processing command queue. Returns 1 if finishes empty. */
int
cmdq_continue(struct cmd_q *cmdq)
{
struct cmd_q_item *next;
enum cmd_retval retval;
int empty, guard, flags;
char s[1024];
notify_disable();
empty = TAILQ_EMPTY(&cmdq->queue);
if (empty)
goto empty;
if (cmdq->item == NULL) {
cmdq->item = TAILQ_FIRST(&cmdq->queue);
cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
} else
cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
do {
next = TAILQ_NEXT(cmdq->item, qentry);
while (cmdq->cmd != NULL) {
cmd_print(cmdq->cmd, s, sizeof s);
log_debug("cmdq %p: %s (client %d)", cmdq, s,
cmdq->client != NULL ? cmdq->client->ibuf.fd : -1);
cmdq->time = time(NULL);
cmdq->number++;
flags = !!(cmdq->cmd->flags & CMD_CONTROL);
guard = cmdq_guard(cmdq, "begin", flags);
retval = cmdq->cmd->entry->exec(cmdq->cmd, cmdq);
if (guard) {
if (retval == CMD_RETURN_ERROR)
cmdq_guard(cmdq, "error", flags);
else
cmdq_guard(cmdq, "end", flags);
}
if (retval == CMD_RETURN_ERROR)
break;
if (retval == CMD_RETURN_WAIT)
goto out;
if (retval == CMD_RETURN_STOP) {
cmdq_flush(cmdq);
goto empty;
}
cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
}
TAILQ_REMOVE(&cmdq->queue, cmdq->item, qentry);
cmd_list_free(cmdq->item->cmdlist);
free(cmdq->item);
cmdq->item = next;
if (cmdq->item != NULL)
cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
} while (cmdq->item != NULL);
empty:
if (cmdq->client_exit > 0)
cmdq->client->flags |= CLIENT_EXIT;
if (cmdq->emptyfn != NULL)
cmdq->emptyfn(cmdq); /* may free cmdq */
empty = 1;
out:
notify_enable();
return (empty);
}
/* Flush command queue. */
void
cmdq_flush(struct cmd_q *cmdq)
{
struct cmd_q_item *item, *item1;
TAILQ_FOREACH_SAFE(item, &cmdq->queue, qentry, item1) {
TAILQ_REMOVE(&cmdq->queue, item, qentry);
cmd_list_free(item->cmdlist);
free(item);
}
cmdq->item = NULL;
}
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