/* spawn.c - Run an arbitrary command with callbacks.

   Copyright (C) 2014 Code GmbH

   This file is part of GPGME.

   GPGME is free software; you can redistribute it and/or modify it

   under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of

   the License, or (at your option) any later version.

   GPGME is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA

   02111-1307, USA.  */

#if HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdlib.h>

#include "gpgme.h"

#include "debug.h"

#include "context.h"

#include "util.h"

#include "ops.h"

static gpgme_error_t

spawn_start (gpgme_ctx_t ctx, int synchronous,

             const char *file, const char *argv[],

             gpgme_data_t datain,

             gpgme_data_t dataout, gpgme_data_t dataerr,

             unsigned int flags)

{

  gpgme_error_t err;

  const char *tmp_argv[2];

  if (ctx->protocol != GPGME_PROTOCOL_SPAWN)

    return gpg_error (GPG_ERR_UNSUPPORTED_PROTOCOL);

  err = _gpgme_op_reset (ctx, synchronous);

  if (err)

    return err;

  if (!argv)

    {

      tmp_argv[0] = _gpgme_get_basename (file);

      tmp_argv[1] = NULL;

      argv = tmp_argv;

    }

  return _gpgme_engine_op_spawn (ctx->engine, file, argv,

                                 datain, dataout, dataerr, flags);

}

/* Run the command FILE with the arguments in ARGV.  Connect stdin to

   DATAIN, stdout to DATAOUT, and STDERR to DATAERR.  If one the data

   streams is NULL, connect to /dev/null instead.  */

gpgme_error_t

gpgme_op_spawn_start (gpgme_ctx_t ctx, const char *file, const char *argv[],

                      gpgme_data_t datain,

                      gpgme_data_t dataout, gpgme_data_t dataerr,

                      unsigned int flags)

{

  gpgme_error_t err;

  TRACE_BEG2 (DEBUG_CTX, "gpgme_op_spawn_start", ctx, "file=(%s) flaggs=%x",

              file, flags);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = spawn_start (ctx, 0, file, argv, datain, dataout, dataerr, flags);

  return err;

}

/* Run the command FILE with the arguments in ARGV.  Connect stdin to

   DATAIN, stdout to DATAOUT, and STDERR to DATAERR.  If one the data

   streams is NULL, connect to /dev/null instead.  Synchronous

   variant. */

gpgme_error_t

gpgme_op_spawn (gpgme_ctx_t ctx, const char *file, const char *argv[],

	        gpgme_data_t datain,

                gpgme_data_t dataout, gpgme_data_t dataerr,

                unsigned int flags)

{

  gpgme_error_t err;

  TRACE_BEG2 (DEBUG_CTX, "gpgme_op_spawn", ctx, "file=(%s) flags=%x",

              file, flags);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = spawn_start (ctx, 1, file, argv, datain, dataout, dataerr, flags);

  if (!err)

    err = _gpgme_wait_one (ctx);

  return TRACE_ERR (err);

}