tmux/cmd-if-shell.c

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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 <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 enum cmd_retval cmd_if_shell_error(struct cmdq_item *, void *);
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 },
.usage = "[-bF] " CMD_TARGET_PANE_USAGE " shell-command command "
"[command]",
.tflag = CMD_PANE_CANFAIL,
.flags = 0,
.exec = cmd_if_shell_exec
};
struct cmd_if_shell_data {
char *file;
u_int line;
char *cmd_if;
char *cmd_else;
struct client *client;
struct cmdq_item *item;
struct mouse_event mouse;
};
static enum cmd_retval
cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
{
struct args *args = self->args;
struct cmd_if_shell_data *cdata;
char *shellcmd, *cmd, *cause;
struct cmd_list *cmdlist;
struct cmdq_item *new_item;
struct session *s = item->state.tflag.s;
struct winlink *wl = item->state.tflag.wl;
struct window_pane *wp = item->state.tflag.wp;
struct format_tree *ft;
const char *cwd;
if (item->client != NULL && item->client->session == NULL)
cwd = item->client->cwd;
else if (s != NULL)
cwd = s->cwd;
else
cwd = NULL;
ft = format_create(item, FORMAT_NONE, 0);
format_defaults(ft, item->state.c, s, wl, 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];
free(shellcmd);
if (cmd == NULL)
return (CMD_RETURN_NORMAL);
cmdlist = cmd_string_parse(cmd, NULL, 0, &cause);
if (cmdlist == NULL) {
if (cause != NULL) {
cmdq_error(item, "%s", cause);
free(cause);
}
return (CMD_RETURN_ERROR);
}
new_item = cmdq_get_command(cmdlist, NULL, &item->mouse, 0);
cmdq_insert_after(item, new_item);
cmd_list_free(cmdlist);
return (CMD_RETURN_NORMAL);
}
cdata = xcalloc(1, sizeof *cdata);
if (self->file != NULL) {
cdata->file = xstrdup(self->file);
cdata->line = self->line;
}
cdata->cmd_if = xstrdup(args->argv[1]);
if (args->argc == 3)
cdata->cmd_else = xstrdup(args->argv[2]);
else
cdata->cmd_else = NULL;
cdata->client = item->client;
cdata->client->references++;
if (!args_has(args, 'b'))
cdata->item = item;
else
cdata->item = NULL;
memcpy(&cdata->mouse, &item->mouse, sizeof cdata->mouse);
job_run(shellcmd, s, cwd, cmd_if_shell_callback, cmd_if_shell_free,
cdata);
free(shellcmd);
if (args_has(args, 'b'))
return (CMD_RETURN_NORMAL);
return (CMD_RETURN_WAIT);
}
static enum cmd_retval
cmd_if_shell_error(struct cmdq_item *item, void *data)
{
char *error = data;
cmdq_error(item, "%s", error);
free(error);
return (CMD_RETURN_NORMAL);
}
static void
cmd_if_shell_callback(struct job *job)
{
struct cmd_if_shell_data *cdata = job->data;
struct client *c = cdata->client;
struct cmd_list *cmdlist;
struct cmdq_item *new_item;
char *cause, *cmd, *file = cdata->file;
u_int line = cdata->line;
if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
cmd = cdata->cmd_else;
else
cmd = cdata->cmd_if;
if (cmd == NULL)
goto out;
cmdlist = cmd_string_parse(cmd, file, line, &cause);
if (cmdlist == NULL) {
if (cause != NULL)
new_item = cmdq_get_callback(cmd_if_shell_error, cause);
else
new_item = NULL;
} else {
new_item = cmdq_get_command(cmdlist, NULL, &cdata->mouse, 0);
cmd_list_free(cmdlist);
}
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)
cdata->item->flags &= ~CMDQ_WAITING;
}
static void
cmd_if_shell_free(void *data)
{
struct cmd_if_shell_data *cdata = data;
server_client_unref(cdata->client);
free(cdata->cmd_else);
free(cdata->cmd_if);
free(cdata->file);
free(cdata);
}