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/* call-syshelp.c - Communication with g13-syshelp
* Copyright (C) 2015 Werner Koch
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <assert.h>
#include <npth.h>
#include "g13.h"
#include <assuan.h>
#include "i18n.h"
#include "utils.h"
/* Local data for this module. A pointer to this is stored in the
CTRL object of each connection. */
struct call_syshelp_s
{
assuan_context_t assctx; /* The Assuan context for the current
g13-syshep connection. */
};
/* Fork off the syshelp tool if this has not already been done. */
static gpg_error_t
start_syshelp (ctrl_t ctrl)
{
gpg_error_t err;
assuan_context_t ctx;
assuan_fd_t no_close_list[3];
int i;
if (ctrl->syshelp_local->assctx)
return 0; /* Already set. */
if (opt.verbose)
log_info ("starting a new syshelp\n");
if (es_fflush (NULL))
{
err = gpg_error_from_syserror ();
log_error ("error flushing pending output: %s\n", gpg_strerror (err));
return err;
}
i = 0;
if (log_get_fd () != -1)
no_close_list[i++] = assuan_fd_from_posix_fd (log_get_fd ());
no_close_list[i++] = assuan_fd_from_posix_fd (es_fileno (es_stderr));
no_close_list[i] = ASSUAN_INVALID_FD;
err = assuan_new (&ctx);
if (err)
{
log_error ("can't allocate assuan context: %s\n", gpg_strerror (err));
return err;
}
/* Call userv to start g13-syshelp. This userv script needs tpo be
installed under the name "gnupg-g13-syshelp":
if ( glob service-user root
)
reset
suppress-args
execute /home/wk/b/gnupg/g13/g13-syshelp -v
else
error Nothing to do for this service-user
fi
quit
*/
{
const char *argv[3];
argv[0] = "userv";
argv[1] = "gnupg-g13-syshelp";
argv[2] = NULL;
err = assuan_pipe_connect (ctx, "/usr/bin/userv", argv,
no_close_list, NULL, NULL, 0);
}
if (err)
{
log_error ("can't connect to '%s' - : %s\n",
"g13-syshelp", gpg_strerror (err));
log_info ("(is userv and its gnupg-g13-syshelp script installed?)\n");
assuan_release (ctx);
return err;
}
ctrl->syshelp_local->assctx = ctx;
if (DBG_IPC)
log_debug ("connection to g13-syshelp established\n");
return 0;
}
/* Release local resources associated with CTRL. */
void
call_syshelp_release (ctrl_t ctrl)
{
assuan_release (ctrl->syshelp_local->assctx);
ctrl->syshelp_local->assctx = NULL;
}
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