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/* $OpenBSD: cmd-if-shell.c,v 1.14 2011/10/27 22:40:15 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 <string.h>
#include "tmux.h"
/*
* Executes a tmux command if a shell command returns true or false.
*/
int cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
void cmd_if_shell_callback(struct job *);
void cmd_if_shell_free(void *);
const struct cmd_entry cmd_if_shell_entry = {
"if-shell", "if",
"", 2, 3,
"shell-command command [command]",
0,
NULL,
NULL,
cmd_if_shell_exec
};
struct cmd_if_shell_data {
char *cmd_if;
char *cmd_else;
struct cmd_ctx ctx;
};
int
cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct args *args = self->args;
struct cmd_if_shell_data *cdata;
const char *shellcmd = args->argv[0];
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;
memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
if (ctx->cmdclient != NULL)
ctx->cmdclient->references++;
if (ctx->curclient != NULL)
ctx->curclient->references++;
job_run(shellcmd, cmd_if_shell_callback, cmd_if_shell_free, cdata);
return (1); /* don't let client exit */
}
void
cmd_if_shell_callback(struct job *job)
{
struct cmd_if_shell_data *cdata = job->data;
struct cmd_ctx *ctx = &cdata->ctx;
struct cmd_list *cmdlist;
char *cause, *cmd;
if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0) {
cmd = cdata->cmd_else;
if (cmd == NULL)
return;
} else
cmd = cdata->cmd_if;
if (cmd_string_parse(cmd, &cmdlist, &cause) != 0) {
if (cause != NULL) {
ctx->error(ctx, "%s", cause);
xfree(cause);
}
return;
}
cmd_list_exec(cmdlist, ctx);
cmd_list_free(cmdlist);
}
void
cmd_if_shell_free(void *data)
{
struct cmd_if_shell_data *cdata = data;
struct cmd_ctx *ctx = &cdata->ctx;
struct msg_exit_data exitdata;
if (ctx->cmdclient != NULL) {
ctx->cmdclient->references--;
exitdata.retcode = ctx->cmdclient->retcode;
ctx->cmdclient->flags |= CLIENT_EXIT;
}
if (ctx->curclient != NULL)
ctx->curclient->references--;
if (cdata->cmd_else != NULL)
xfree(cdata->cmd_else);
xfree(cdata->cmd_if);
xfree(cdata);
}
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