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/* $OpenBSD: cmd-if-shell.c,v 1.27 2014/12/02 23:39:02 nicm Exp $ */
/*
* 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 <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Executes a tmux command if a shell command returns true or false.
*/
enum cmd_retval cmd_if_shell_exec(struct cmd *, struct cmd_q *);
void cmd_if_shell_callback(struct job *);
void cmd_if_shell_done(struct cmd_q *);
void cmd_if_shell_free(void *);
const struct cmd_entry cmd_if_shell_entry = {
"if-shell", "if",
"bFt:", 2, 3,
"[-bF] " CMD_TARGET_PANE_USAGE " shell-command command [command]",
0,
cmd_if_shell_exec
};
struct cmd_if_shell_data {
char *cmd_if;
char *cmd_else;
struct cmd_q *cmdq;
int bflag;
int started;
};
enum cmd_retval
cmd_if_shell_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct cmd_if_shell_data *cdata;
char *shellcmd, *cmd, *cause;
struct cmd_list *cmdlist;
struct client *c;
struct session *s = NULL;
struct winlink *wl = NULL;
struct window_pane *wp = NULL;
struct format_tree *ft;
if (args_has(args, 't'))
wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp);
else {
c = cmd_find_client(cmdq, NULL, 1);
if (c != NULL && c->session != NULL) {
s = c->session;
wl = s->curw;
wp = wl->window->active;
}
}
ft = format_create();
if (s != NULL)
format_session(ft, s);
if (s != NULL && wl != NULL)
format_winlink(ft, s, wl);
if (wp != NULL)
format_window_pane(ft, wp);
shellcmd = format_expand(ft, args->argv[0]);
format_free(ft);
if (args_has(args, 'F')) {
cmd = NULL;
if (*shellcmd != '0' && *shellcmd != '\0')
cmd = args->argv[1];
else if (args->argc == 3)
cmd = args->argv[2];
if (cmd == NULL)
return (CMD_RETURN_NORMAL);
if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) {
if (cause != NULL) {
cmdq_error(cmdq, "%s", cause);
free(cause);
}
return (CMD_RETURN_ERROR);
}
cmdq_run(cmdq, cmdlist);
cmd_list_free(cmdlist);
return (CMD_RETURN_NORMAL);
}
cdata = xmalloc(sizeof *cdata);
cdata->cmd_if = xstrdup(args->argv[1]);
if (args->argc == 3)
cdata->cmd_else = xstrdup(args->argv[2]);
else
cdata->cmd_else = NULL;
cdata->bflag = args_has(args, 'b');
cdata->started = 0;
cdata->cmdq = cmdq;
cmdq->references++;
job_run(shellcmd, s, cmd_if_shell_callback, cmd_if_shell_free, cdata);
free(shellcmd);
if (cdata->bflag)
return (CMD_RETURN_NORMAL);
return (CMD_RETURN_WAIT);
}
void
cmd_if_shell_callback(struct job *job)
{
struct cmd_if_shell_data *cdata = job->data;
struct cmd_q *cmdq = cdata->cmdq, *cmdq1;
struct cmd_list *cmdlist;
char *cause, *cmd;
if (cmdq->dead)
return;
if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
cmd = cdata->cmd_else;
else
cmd = cdata->cmd_if;
if (cmd == NULL)
return;
if (cmd_string_parse(cmd, &cmdlist, NULL, 0, &cause) != 0) {
if (cause != NULL) {
cmdq_error(cmdq, "%s", cause);
free(cause);
}
return;
}
cdata->started = 1;
cmdq1 = cmdq_new(cmdq->client);
cmdq1->emptyfn = cmd_if_shell_done;
cmdq1->data = cdata;
cmdq_run(cmdq1, cmdlist);
cmd_list_free(cmdlist);
}
void
cmd_if_shell_done(struct cmd_q *cmdq1)
{
struct cmd_if_shell_data *cdata = cmdq1->data;
struct cmd_q *cmdq = cdata->cmdq;
if (cmdq1->client_exit >= 0)
cmdq->client_exit = cmdq1->client_exit;
if (!cmdq_free(cmdq) && !cdata->bflag)
cmdq_continue(cmdq);
cmdq_free(cmdq1);
free(cdata->cmd_else);
free(cdata->cmd_if);
free(cdata);
}
void
cmd_if_shell_free(void *data)
{
struct cmd_if_shell_data *cdata = data;
struct cmd_q *cmdq = cdata->cmdq;
if (cdata->started)
return;
if (!cmdq_free(cmdq) && !cdata->bflag)
cmdq_continue(cmdq);
free(cdata->cmd_else);
free(cdata->cmd_if);
free(cdata);
}
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