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/* $OpenBSD: hooks.c,v 1.4 2015/12/16 21:50:37 nicm Exp $ */
/*
* Copyright (c) 2012 Thomas Adam <thomas@xteddy.org>
*
* 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 <stdlib.h>
#include <string.h>
#include "tmux.h"
struct hooks {
RB_HEAD(hooks_tree, hook) tree;
struct hooks *parent;
};
static int hooks_cmp(struct hook *, struct hook *);
RB_PROTOTYPE(hooks_tree, hook, entry, hooks_cmp);
RB_GENERATE(hooks_tree, hook, entry, hooks_cmp);
static struct hook *hooks_find1(struct hooks *, const char *);
static void hooks_free1(struct hooks *, struct hook *);
static void hooks_emptyfn(struct cmd_q *);
static int
hooks_cmp(struct hook *hook1, struct hook *hook2)
{
return (strcmp(hook1->name, hook2->name));
}
struct hooks *
hooks_get(struct session *s)
{
if (s != NULL)
return (s->hooks);
return (global_hooks);
}
struct hooks *
hooks_create(struct hooks *parent)
{
struct hooks *hooks;
hooks = xcalloc(1, sizeof *hooks);
RB_INIT(&hooks->tree);
hooks->parent = parent;
return (hooks);
}
static void
hooks_free1(struct hooks *hooks, struct hook *hook)
{
RB_REMOVE(hooks_tree, &hooks->tree, hook);
cmd_list_free(hook->cmdlist);
free((char *)hook->name);
free(hook);
}
void
hooks_free(struct hooks *hooks)
{
struct hook *hook, *hook1;
RB_FOREACH_SAFE(hook, hooks_tree, &hooks->tree, hook1)
hooks_free1(hooks, hook);
free(hooks);
}
struct hook *
hooks_first(struct hooks *hooks)
{
return (RB_MIN(hooks_tree, &hooks->tree));
}
struct hook *
hooks_next(struct hook *hook)
{
return (RB_NEXT(hooks_tree, &hooks->tree, hook));
}
void
hooks_add(struct hooks *hooks, const char *name, struct cmd_list *cmdlist)
{
struct hook *hook;
if ((hook = hooks_find1(hooks, name)) != NULL)
hooks_free1(hooks, hook);
hook = xcalloc(1, sizeof *hook);
hook->name = xstrdup(name);
hook->cmdlist = cmdlist;
hook->cmdlist->references++;
RB_INSERT(hooks_tree, &hooks->tree, hook);
}
void
hooks_remove(struct hooks *hooks, const char *name)
{
struct hook *hook;
if ((hook = hooks_find1(hooks, name)) != NULL)
hooks_free1(hooks, hook);
}
static struct hook *
hooks_find1(struct hooks *hooks, const char *name)
{
struct hook hook;
hook.name = name;
return (RB_FIND(hooks_tree, &hooks->tree, &hook));
}
struct hook *
hooks_find(struct hooks *hooks, const char *name)
{
struct hook hook0, *hook;
hook0.name = name;
hook = RB_FIND(hooks_tree, &hooks->tree, &hook0);
while (hook == NULL) {
hooks = hooks->parent;
if (hooks == NULL)
break;
hook = RB_FIND(hooks_tree, &hooks->tree, &hook0);
}
return (hook);
}
static void
hooks_emptyfn(struct cmd_q *hooks_cmdq)
{
struct cmd_q *cmdq = hooks_cmdq->data;
if (cmdq != NULL) {
if (hooks_cmdq->client_exit >= 0)
cmdq->client_exit = hooks_cmdq->client_exit;
if (!cmdq_free(cmdq))
cmdq_continue(cmdq);
}
cmdq_free(hooks_cmdq);
}
int
hooks_run(struct hooks *hooks, struct client *c, struct cmd_find_state *fs,
const char *fmt, ...)
{
struct hook *hook;
struct cmd_q *hooks_cmdq;
va_list ap;
char *name;
va_start(ap, fmt);
xvasprintf(&name, fmt, ap);
va_end(ap);
hook = hooks_find(hooks, name);
if (hook == NULL) {
free(name);
return (-1);
}
log_debug("running hook %s", name);
free(name);
hooks_cmdq = cmdq_new(c);
hooks_cmdq->flags |= CMD_Q_NOHOOKS;
if (fs != NULL)
cmd_find_copy_state(&hooks_cmdq->current, fs);
hooks_cmdq->parent = NULL;
cmdq_run(hooks_cmdq, hook->cmdlist, NULL);
cmdq_free(hooks_cmdq);
return (0);
}
int
hooks_wait(struct hooks *hooks, struct cmd_q *cmdq, struct cmd_find_state *fs,
const char *fmt, ...)
{
struct hook *hook;
struct cmd_q *hooks_cmdq;
va_list ap;
char *name;
va_start(ap, fmt);
xvasprintf(&name, fmt, ap);
va_end(ap);
hook = hooks_find(hooks, name);
if (hook == NULL) {
free(name);
return (-1);
}
log_debug("running hook %s (parent %p)", name, cmdq);
free(name);
hooks_cmdq = cmdq_new(cmdq->client);
hooks_cmdq->flags |= CMD_Q_NOHOOKS;
if (fs != NULL)
cmd_find_copy_state(&hooks_cmdq->current, fs);
hooks_cmdq->parent = cmdq;
hooks_cmdq->emptyfn = hooks_emptyfn;
hooks_cmdq->data = cmdq;
if (cmdq != NULL)
cmdq->references++;
cmdq_run(hooks_cmdq, hook->cmdlist, NULL);
return (0);
}
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