9f24e6c901
* src/engine-assuan.c (_gpgme_engine_ops_assuan): Add conf_dir. * src/engine-g13.c (_gpgme_engine_ops_g13): Likewise. * src/engine-gpg.c (_gpgme_engine_ops_gpg): Likewise. * src/engine-gpgsm.c (_gpgme_engine_ops_gpgsm): Likewise. * src/engine-spawn.c (_gpgme_engine_ops_spawn): Likewise. * src/engine-uiserver.c (_gpgme_engine_ops_uiserver): Likewise. * src/engine-backend.h (struct engine_ops): Likewise. * src/engine-gpgconf.c (gpgconf_config_dir_cb, gpgconf_conf_dir): New functions. (struct engine_ops): Add gpgconf_conf_dir. * src/engine.c (_gpgme_engine_op_conf_dir): New function. * src/engine.h (_gpgme_engine_op_conf_dir): New prototype. * src/gpgconf.c (gpgme_op_conf_dir): New function. * src/gpgme.def (gpgme_op_conf_save): New symbol. * src/gpgme.h.in (gpgme_op_conf_dir): New prototype. * src/libgpgme.vers (gpgme_op_conf_dir): New symbol. * tests/gpg/t-gpgconf.c (main): Test gpgme_op_conf_dir. Signed-off-by: Marcus Brinkmann <mb@g10code.com> GnuPG-bug-id: 3018
482 lines
11 KiB
C
482 lines
11 KiB
C
/* engine-spawn.c - Run an arbitrary program
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Copyright (C) 2014 g10 Code GmbH
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This file is part of GPGME.
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GPGME is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of
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the License, or (at your option) any later version.
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GPGME is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#include "gpgme.h"
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#include "util.h"
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#include "ops.h"
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#include "wait.h"
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#include "context.h" /*temp hack until we have GpmeData methods to do I/O */
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#include "priv-io.h"
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#include "sema.h"
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#include "debug.h"
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#include "engine-backend.h"
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/* This type is used to build a list of data sources/sinks. */
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struct datalist_s
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{
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struct datalist_s *next;
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gpgme_data_t data; /* The data object. */
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int inbound; /* True if this is used for reading from the peer. */
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int dup_to; /* The fd used by the peer. */
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};
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struct fd_data_map_s
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{
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gpgme_data_t data;
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int inbound; /* True if this is used for reading from the peer. */
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int dup_to; /* Dup the fd to that one. */
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int fd; /* The fd to use. */
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int peer_fd; /* The other side of the pipe. */
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void *tag; /* Tag used by the I/O callback. */
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};
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struct engine_spawn
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{
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struct datalist_s *arglist;
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struct datalist_s **argtail;
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struct fd_data_map_s *fd_data_map;
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struct gpgme_io_cbs io_cbs;
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};
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typedef struct engine_spawn *engine_spawn_t;
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static void engspawn_io_event (void *engine,
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gpgme_event_io_t type, void *type_data);
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static gpgme_error_t engspawn_cancel (void *engine);
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static void
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close_notify_handler (int fd, void *opaque)
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{
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engine_spawn_t esp = opaque;
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int i;
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assert (fd != -1);
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if (esp->fd_data_map)
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{
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for (i = 0; esp->fd_data_map[i].data; i++)
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{
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if (esp->fd_data_map[i].fd == fd)
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{
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if (esp->fd_data_map[i].tag)
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(*esp->io_cbs.remove) (esp->fd_data_map[i].tag);
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esp->fd_data_map[i].fd = -1;
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break;
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}
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if (esp->fd_data_map[i].peer_fd == fd)
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{
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esp->fd_data_map[i].peer_fd = -1;
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break;
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}
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}
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}
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}
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static gpgme_error_t
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add_data (engine_spawn_t esp, gpgme_data_t data, int dup_to, int inbound)
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{
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struct datalist_s *a;
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assert (esp);
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assert (data);
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a = malloc (sizeof *a);
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if (!a)
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return gpg_error_from_syserror ();
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a->next = NULL;
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a->data = data;
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a->inbound = inbound;
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a->dup_to = dup_to;
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*esp->argtail = a;
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esp->argtail = &a->next;
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return 0;
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}
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static void
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free_fd_data_map (struct fd_data_map_s *fd_data_map)
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{
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int i;
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if (!fd_data_map)
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return;
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for (i = 0; fd_data_map[i].data; i++)
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{
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if (fd_data_map[i].fd != -1)
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_gpgme_io_close (fd_data_map[i].fd);
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if (fd_data_map[i].peer_fd != -1)
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_gpgme_io_close (fd_data_map[i].peer_fd);
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/* Don't release data because this is only a reference. */
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}
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free (fd_data_map);
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}
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static gpgme_error_t
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build_fd_data_map (engine_spawn_t esp)
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{
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struct datalist_s *a;
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size_t datac;
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int fds[2];
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for (datac = 0, a = esp->arglist; a; a = a->next)
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if (a->data)
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datac++;
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free_fd_data_map (esp->fd_data_map);
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esp->fd_data_map = calloc (datac + 1, sizeof *esp->fd_data_map);
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if (!esp->fd_data_map)
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return gpg_error_from_syserror ();
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for (datac = 0, a = esp->arglist; a; a = a->next)
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{
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assert (a->data);
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if (_gpgme_io_pipe (fds, a->inbound ? 1 : 0) == -1)
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{
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free (esp->fd_data_map);
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esp->fd_data_map = NULL;
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return gpg_error_from_syserror ();
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}
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if (_gpgme_io_set_close_notify (fds[0], close_notify_handler, esp)
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|| _gpgme_io_set_close_notify (fds[1], close_notify_handler, esp))
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{
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/* FIXME: Need error cleanup. */
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return gpg_error (GPG_ERR_GENERAL);
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}
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esp->fd_data_map[datac].inbound = a->inbound;
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if (a->inbound)
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{
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esp->fd_data_map[datac].fd = fds[0];
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esp->fd_data_map[datac].peer_fd = fds[1];
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}
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else
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{
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esp->fd_data_map[datac].fd = fds[1];
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esp->fd_data_map[datac].peer_fd = fds[0];
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}
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esp->fd_data_map[datac].data = a->data;
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esp->fd_data_map[datac].dup_to = a->dup_to;
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datac++;
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}
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return 0;
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}
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static gpgme_error_t
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add_io_cb (engine_spawn_t esp, int fd, int dir, gpgme_io_cb_t handler,
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void *data, void **tag)
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{
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gpgme_error_t err;
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err = (*esp->io_cbs.add) (esp->io_cbs.add_priv, fd, dir, handler, data, tag);
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if (err)
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return err;
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if (!dir) /* Fixme: Kludge around poll() problem. */
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err = _gpgme_io_set_nonblocking (fd);
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return err;
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}
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static gpgme_error_t
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engspawn_start (engine_spawn_t esp, const char *file, const char *argv[],
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unsigned int flags)
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{
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gpgme_error_t err;
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int i, n;
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int status;
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struct spawn_fd_item_s *fd_list;
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pid_t pid;
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unsigned int spflags;
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const char *save_argv0 = NULL;
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if (!esp || !file || !argv || !argv[0])
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return gpg_error (GPG_ERR_INV_VALUE);
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spflags = 0;
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if ((flags & GPGME_SPAWN_DETACHED))
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spflags |= IOSPAWN_FLAG_DETACHED;
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if ((flags & GPGME_SPAWN_ALLOW_SET_FG))
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spflags |= IOSPAWN_FLAG_ALLOW_SET_FG;
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err = build_fd_data_map (esp);
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if (err)
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return err;
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n = 0;
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for (i = 0; esp->fd_data_map[i].data; i++)
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n++;
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fd_list = calloc (n+1, sizeof *fd_list);
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if (!fd_list)
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return gpg_error_from_syserror ();
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/* Build the fd list for the child. */
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n = 0;
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for (i = 0; esp->fd_data_map[i].data; i++)
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{
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fd_list[n].fd = esp->fd_data_map[i].peer_fd;
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fd_list[n].dup_to = esp->fd_data_map[i].dup_to;
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n++;
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}
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fd_list[n].fd = -1;
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fd_list[n].dup_to = -1;
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if (argv[0] && !*argv[0])
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{
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save_argv0 = argv[0];
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argv[0] = _gpgme_get_basename (file);
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}
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status = _gpgme_io_spawn (file, (char * const *)argv, spflags,
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fd_list, NULL, NULL, &pid);
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if (save_argv0)
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argv[0] = save_argv0;
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free (fd_list);
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if (status == -1)
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return gpg_error_from_syserror ();
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for (i = 0; esp->fd_data_map[i].data; i++)
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{
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err = add_io_cb (esp, esp->fd_data_map[i].fd,
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esp->fd_data_map[i].inbound,
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esp->fd_data_map[i].inbound
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? _gpgme_data_inbound_handler
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: _gpgme_data_outbound_handler,
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esp->fd_data_map[i].data, &esp->fd_data_map[i].tag);
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if (err)
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return err; /* FIXME: kill the child */
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}
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engspawn_io_event (esp, GPGME_EVENT_START, NULL);
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return 0;
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}
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/*
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Public functions
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*/
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static const char *
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engspawn_get_file_name (void)
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{
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return "/nonexistent";
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}
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static char *
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engspawn_get_version (const char *file_name)
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{
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(void)file_name;
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return NULL;
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}
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static const char *
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engspawn_get_req_version (void)
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{
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return NULL;
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}
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static gpgme_error_t
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engspawn_new (void **engine, const char *file_name, const char *home_dir,
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const char *version)
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{
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engine_spawn_t esp;
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(void)file_name;
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(void)home_dir;
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(void)version;
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esp = calloc (1, sizeof *esp);
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if (!esp)
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return gpg_error_from_syserror ();
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esp->argtail = &esp->arglist;
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*engine = esp;
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return 0;
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}
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static void
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engspawn_release (void *engine)
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{
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engine_spawn_t esp = engine;
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if (!esp)
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return;
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engspawn_cancel (engine);
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while (esp->arglist)
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{
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struct datalist_s *next = esp->arglist->next;
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free (esp->arglist);
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esp->arglist = next;
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}
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free (esp);
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}
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static void
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engspawn_set_io_cbs (void *engine, gpgme_io_cbs_t io_cbs)
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{
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engine_spawn_t esp = engine;
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esp->io_cbs = *io_cbs;
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}
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static void
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engspawn_io_event (void *engine, gpgme_event_io_t type, void *type_data)
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{
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engine_spawn_t esp = engine;
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TRACE3 (DEBUG_ENGINE, "gpgme:engspawn_io_event", esp,
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"event %p, type %d, type_data %p",
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esp->io_cbs.event, type, type_data);
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if (esp->io_cbs.event)
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(*esp->io_cbs.event) (esp->io_cbs.event_priv, type, type_data);
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}
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static gpgme_error_t
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engspawn_cancel (void *engine)
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{
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engine_spawn_t esp = engine;
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if (!esp)
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return gpg_error (GPG_ERR_INV_VALUE);
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if (esp->fd_data_map)
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{
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free_fd_data_map (esp->fd_data_map);
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esp->fd_data_map = NULL;
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}
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return 0;
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}
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static gpgme_error_t
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engspawn_op_spawn (void *engine,
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const char *file, const char *argv[],
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gpgme_data_t datain,
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gpgme_data_t dataout, gpgme_data_t dataerr,
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unsigned int flags)
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{
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engine_spawn_t esp = engine;
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gpgme_error_t err = 0;
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if (datain)
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err = add_data (esp, datain, 0, 0);
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if (!err && dataout)
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err = add_data (esp, dataout, 1, 1);
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if (!err && dataerr)
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err = add_data (esp, dataerr, 2, 1);
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if (!err)
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err = engspawn_start (esp, file, argv, flags);
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return err;
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}
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struct engine_ops _gpgme_engine_ops_spawn =
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{
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/* Static functions. */
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engspawn_get_file_name,
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NULL, /* get_home_dir */
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engspawn_get_version,
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engspawn_get_req_version,
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engspawn_new,
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/* Member functions. */
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engspawn_release,
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NULL, /* reset */
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NULL, /* set_status_cb */
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NULL, /* set_status_handler */
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NULL, /* set_command_handler */
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NULL, /* set_colon_line_handler */
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NULL, /* set_locale */
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NULL, /* set_protocol */
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NULL, /* decrypt */
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NULL, /* delete */
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NULL, /* edit */
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NULL, /* encrypt */
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NULL, /* encrypt_sign */
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NULL, /* export */
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NULL, /* export_ext */
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NULL, /* genkey */
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NULL, /* import */
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NULL, /* keylist */
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NULL, /* keylist_ext */
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NULL, /* keylist_data */
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NULL, /* keysign */
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NULL, /* tofu_policy */
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NULL, /* sign */
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NULL, /* trustlist */
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NULL, /* verify */
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NULL, /* getauditlog */
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NULL, /* opassuan_transact */
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NULL, /* conf_load */
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NULL, /* conf_save */
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NULL, /* conf_dir */
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NULL, /* query_swdb */
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engspawn_set_io_cbs,
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engspawn_io_event, /* io_event */
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engspawn_cancel, /* cancel */
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NULL, /* cancel_op */
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NULL, /* passwd */
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NULL, /* set_pinentry_mode */
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engspawn_op_spawn /* opspawn */
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};
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