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/* $OpenBSD$ */
/*
* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
* Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.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 <sys/wait.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Executes a tmux command if a shell command returns true or false.
*/
static enum args_parse_type cmd_if_shell_args_parse(struct args *, u_int,
char **);
static enum cmd_retval cmd_if_shell_exec(struct cmd *,
struct cmdq_item *);
static void cmd_if_shell_callback(struct job *);
static void cmd_if_shell_free(void *);
const struct cmd_entry cmd_if_shell_entry = {
.name = "if-shell",
.alias = "if",
.args = { "bFt:", 2, 3, cmd_if_shell_args_parse },
.usage = "[-bF] " CMD_TARGET_PANE_USAGE " shell-command command "
"[command]",
.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
.flags = 0,
.exec = cmd_if_shell_exec
};
struct cmd_if_shell_data {
struct args_command_state *cmd_if;
struct args_command_state *cmd_else;
struct client *client;
struct cmdq_item *item;
};
static enum args_parse_type
cmd_if_shell_args_parse(__unused struct args *args, u_int idx,
__unused char **cause)
{
if (idx == 1 || idx == 2)
return (ARGS_PARSE_COMMANDS_OR_STRING);
return (ARGS_PARSE_STRING);
}
static enum cmd_retval
cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
{
struct args *args = cmd_get_args(self);
struct cmd_find_state *target = cmdq_get_target(item);
struct cmd_if_shell_data *cdata;
struct cmdq_item *new_item;
char *shellcmd;
struct client *tc = cmdq_get_target_client(item);
struct session *s = target->s;
struct cmd_list *cmdlist;
u_int count = args_count(args);
int wait = !args_has(args, 'b');
shellcmd = format_single_from_target(item, args_string(args, 0));
if (args_has(args, 'F')) {
if (*shellcmd != '0' && *shellcmd != '\0')
cmdlist = args_make_commands_now(self, item, 1, 0);
else if (count == 3)
cmdlist = args_make_commands_now(self, item, 2, 0);
else {
free(shellcmd);
return (CMD_RETURN_NORMAL);
}
free(shellcmd);
if (cmdlist == NULL)
return (CMD_RETURN_ERROR);
new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
cmdq_insert_after(item, new_item);
return (CMD_RETURN_NORMAL);
}
cdata = xcalloc(1, sizeof *cdata);
cdata->cmd_if = args_make_commands_prepare(self, item, 1, NULL, wait,
0);
if (count == 3) {
cdata->cmd_else = args_make_commands_prepare(self, item, 2,
NULL, wait, 0);
}
if (wait) {
cdata->client = cmdq_get_client(item);
cdata->item = item;
} else
cdata->client = tc;
if (cdata->client != NULL)
cdata->client->references++;
if (job_run(shellcmd, 0, NULL, NULL, s,
server_client_get_cwd(cmdq_get_client(item), s), NULL,
cmd_if_shell_callback, cmd_if_shell_free, cdata, 0, -1,
-1) == NULL) {
cmdq_error(item, "failed to run command: %s", shellcmd);
free(shellcmd);
free(cdata);
return (CMD_RETURN_ERROR);
}
free(shellcmd);
if (!wait)
return (CMD_RETURN_NORMAL);
return (CMD_RETURN_WAIT);
}
static void
cmd_if_shell_callback(struct job *job)
{
struct cmd_if_shell_data *cdata = job_get_data(job);
struct client *c = cdata->client;
struct cmdq_item *item = cdata->item, *new_item;
struct args_command_state *state;
struct cmd_list *cmdlist;
char *error;
int status;
status = job_get_status(job);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
state = cdata->cmd_else;
else
state = cdata->cmd_if;
if (state == NULL)
goto out;
cmdlist = args_make_commands(state, 0, NULL, &error);
if (cmdlist == NULL) {
if (cdata->item == NULL) {
*error = toupper((u_char)*error);
status_message_set(c, -1, 1, 0, "%s", error);
} else
cmdq_error(cdata->item, "%s", error);
free(error);
} else if (item == NULL) {
new_item = cmdq_get_command(cmdlist, NULL);
cmdq_append(c, new_item);
} else {
new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
cmdq_insert_after(item, new_item);
}
out:
if (cdata->item != NULL)
cmdq_continue(cdata->item);
}
static void
cmd_if_shell_free(void *data)
{
struct cmd_if_shell_data *cdata = data;
if (cdata->client != NULL)
server_client_unref(cdata->client);
if (cdata->cmd_else != NULL)
args_make_commands_free(cdata->cmd_else);
args_make_commands_free(cdata->cmd_if);
free(cdata);
}
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