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/* $OpenBSD: cmd-if-shell.c,v 1.79 2021/08/21 17:25:32 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.
*/
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, NULL },
.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 cmd_parse_input input;
char *cmd_if;
char *cmd_else;
struct client *client;
struct cmdq_item *item;
};
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 cmdq_state *state = cmdq_get_state(item);
struct cmd_if_shell_data *cdata;
char *shellcmd, *error;
const char *cmd = NULL, *file;
struct client *tc = cmdq_get_target_client(item);
struct session *s = target->s;
struct cmd_parse_input pi;
enum cmd_parse_status status;
u_int count = args_count(args);
shellcmd = format_single_from_target(item, args_string(args, 0));
if (args_has(args, 'F')) {
if (*shellcmd != '0' && *shellcmd != '\0')
cmd = args_string(args, 1);
else if (count == 3)
cmd = args_string(args, 2);
free(shellcmd);
if (cmd == NULL)
return (CMD_RETURN_NORMAL);
memset(&pi, 0, sizeof pi);
cmd_get_source(self, &pi.file, &pi.line);
pi.item = item;
pi.c = tc;
cmd_find_copy_state(&pi.fs, target);
status = cmd_parse_and_insert(cmd, &pi, item, state, &error);
if (status == CMD_PARSE_ERROR) {
cmdq_error(item, "%s", error);
free(error);
return (CMD_RETURN_ERROR);
}
return (CMD_RETURN_NORMAL);
}
cdata = xcalloc(1, sizeof *cdata);
cdata->cmd_if = xstrdup(args_string(args, 1));
if (count == 3)
cdata->cmd_else = xstrdup(args_string(args, 2));
if (!args_has(args, 'b'))
cdata->client = cmdq_get_client(item);
else
cdata->client = tc;
if (cdata->client != NULL)
cdata->client->references++;
if (!args_has(args, 'b'))
cdata->item = item;
cmd_get_source(self, &file, &cdata->input.line);
if (file != NULL)
cdata->input.file = xstrdup(file);
cdata->input.c = tc;
if (cdata->input.c != NULL)
cdata->input.c->references++;
cmd_find_copy_state(&cdata->input.fs, target);
if (job_run(shellcmd, 0, 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 (args_has(args, 'b'))
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 *new_item = NULL;
struct cmdq_state *new_state = NULL;
char *cmd;
int status;
struct cmd_parse_result *pr;
status = job_get_status(job);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
cmd = cdata->cmd_else;
else
cmd = cdata->cmd_if;
if (cmd == NULL)
goto out;
pr = cmd_parse_from_string(cmd, &cdata->input);
switch (pr->status) {
case CMD_PARSE_ERROR:
if (cdata->item != NULL)
cmdq_error(cdata->item, "%s", pr->error);
free(pr->error);
break;
case CMD_PARSE_SUCCESS:
if (cdata->item == NULL)
new_state = cmdq_new_state(NULL, NULL, 0);
else
new_state = cmdq_get_state(cdata->item);
new_item = cmdq_get_command(pr->cmdlist, new_state);
if (cdata->item == NULL)
cmdq_free_state(new_state);
cmd_list_free(pr->cmdlist);
break;
}
if (new_item != NULL) {
if (cdata->item == NULL)
cmdq_append(c, new_item);
else
cmdq_insert_after(cdata->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);
free(cdata->cmd_else);
free(cdata->cmd_if);
if (cdata->input.c != NULL)
server_client_unref(cdata->input.c);
free((void *)cdata->input.file);
free(cdata);
}
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