575 lines
18 KiB
C
575 lines
18 KiB
C
/* dirinfo.c - Get directory information
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* Copyright (C) 2009, 2013 g10 Code GmbH
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*
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* This file is part of GPGME.
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*
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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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*
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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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*
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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://gnu.org/licenses/>.
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* SPDX-License-Identifier: LGPL-2.1-or-later
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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 <stdlib.h>
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#include <string.h>
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#include "gpgme.h"
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#include "util.h"
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#include "priv-io.h"
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#include "debug.h"
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#include "sema.h"
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#include "sys-util.h"
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#ifdef HAVE_DOSISH_SYSTEM
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# define EXEEXT_S ".exe"
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#else
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# define EXEEXT_S ""
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#endif
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DEFINE_STATIC_LOCK (dirinfo_lock);
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/* Constants used internally to select the data. */
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enum
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{
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WANT_HOMEDIR,
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WANT_SYSCONFDIR,
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WANT_BINDIR,
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WANT_LIBEXECDIR,
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WANT_LIBDIR,
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WANT_DATADIR,
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WANT_LOCALEDIR,
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WANT_SOCKETDIR,
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WANT_AGENT_SOCKET,
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WANT_AGENT_SSH_SOCKET,
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WANT_DIRMNGR_SOCKET,
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WANT_UISRV_SOCKET,
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WANT_GPGCONF_NAME,
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WANT_GPG_NAME,
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WANT_GPGSM_NAME,
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WANT_G13_NAME,
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WANT_KEYBOXD_NAME,
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WANT_AGENT_NAME,
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WANT_SCDAEMON_NAME,
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WANT_DIRMNGR_NAME,
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WANT_PINENTRY_NAME,
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WANT_GPG_WKS_CLIENT_NAME,
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WANT_GPGTAR_NAME,
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WANT_GPG_ONE_MODE
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};
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/* Values retrieved via gpgconf and cached here. */
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static struct {
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int valid; /* Cached information is valid. */
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int disable_gpgconf;
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char *homedir;
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char *sysconfdir;
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char *bindir;
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char *libexecdir;
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char *libdir;
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char *datadir;
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char *localedir;
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char *socketdir;
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char *agent_socket;
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char *agent_ssh_socket;
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char *dirmngr_socket;
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char *uisrv_socket;
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char *gpgconf_name;
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char *gpg_name;
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char *gpgsm_name;
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char *g13_name;
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char *keyboxd_name;
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char *agent_name;
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char *scdaemon_name;
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char *dirmngr_name;
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char *pinentry_name;
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char *gpg_wks_client_name;
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char *gpgtar_name;
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int gpg_one_mode; /* System is in gpg1 mode. */
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} dirinfo;
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/* Helper function to be used only by gpgme_set_global_flag. */
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void
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_gpgme_dirinfo_disable_gpgconf (void)
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{
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dirinfo.disable_gpgconf = 1;
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}
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/* Return the length of the directory part including the trailing
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* slash of NAME. */
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static size_t
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dirname_len (const char *name)
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{
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return _gpgme_get_basename (name) - name;
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}
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/* Parse the output of "gpgconf --list-dirs". This function expects
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that DIRINFO_LOCK is held by the caller. If COMPONENTS is set, the
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output of --list-components is expected. */
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static void
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parse_output (char *line, int components)
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{
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char *value, *p;
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size_t n;
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value = strchr (line, ':');
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if (!value)
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return;
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*value++ = 0;
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if (components)
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{
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/* Skip the second field. */
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value = strchr (value, ':');
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if (!value)
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return;
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*value++ = 0;
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}
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p = strchr (value, ':');
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if (p)
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*p = 0;
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if (_gpgme_decode_percent_string (value, &value, strlen (value)+1, 0))
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return;
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if (!*value)
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return;
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if (components)
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{
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if (!strcmp (line, "gpg") && !dirinfo.gpg_name)
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dirinfo.gpg_name = strdup (value);
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else if (!strcmp (line, "gpgsm") && !dirinfo.gpgsm_name)
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dirinfo.gpgsm_name = strdup (value);
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else if (!strcmp (line, "g13") && !dirinfo.g13_name)
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dirinfo.g13_name = strdup (value);
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else if (!strcmp (line, "keyboxd") && !dirinfo.keyboxd_name)
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dirinfo.keyboxd_name = strdup (value);
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else if (!strcmp (line, "gpg-agent") && !dirinfo.agent_name)
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dirinfo.agent_name = strdup (value);
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else if (!strcmp (line, "scdaemon") && !dirinfo.scdaemon_name)
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dirinfo.scdaemon_name = strdup (value);
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else if (!strcmp (line, "dirmngr") && !dirinfo.dirmngr_name)
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dirinfo.dirmngr_name = strdup (value);
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else if (!strcmp (line, "pinentry") && !dirinfo.pinentry_name)
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dirinfo.pinentry_name = strdup (value);
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}
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else
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{
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if (!strcmp (line, "homedir") && !dirinfo.homedir)
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dirinfo.homedir = strdup (value);
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else if (!strcmp (line, "sysconfdir") && !dirinfo.sysconfdir)
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dirinfo.sysconfdir = strdup (value);
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else if (!strcmp (line, "bindir") && !dirinfo.bindir)
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dirinfo.bindir = strdup (value);
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else if (!strcmp (line, "libexecdir") && !dirinfo.libexecdir)
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dirinfo.libexecdir = strdup (value);
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else if (!strcmp (line, "libdir") && !dirinfo.libdir)
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dirinfo.libdir = strdup (value);
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else if (!strcmp (line, "datadir") && !dirinfo.datadir)
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dirinfo.datadir = strdup (value);
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else if (!strcmp (line, "localedir") && !dirinfo.localedir)
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dirinfo.localedir = strdup (value);
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else if (!strcmp (line, "socketdir") && !dirinfo.socketdir)
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dirinfo.socketdir = strdup (value);
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else if (!strcmp (line, "agent-socket") && !dirinfo.agent_socket)
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{
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const char name[] = "S.uiserver";
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char *buffer;
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dirinfo.agent_socket = strdup (value);
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if (dirinfo.agent_socket)
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{
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n = dirname_len (dirinfo.agent_socket);
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buffer = malloc (n + strlen (name) + 1);
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if (buffer)
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{
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strncpy (buffer, dirinfo.agent_socket, n);
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strcpy (buffer + n, name);
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dirinfo.uisrv_socket = buffer;
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}
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}
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}
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else if (!strcmp (line, "dirmngr-socket") && !dirinfo.dirmngr_socket)
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dirinfo.dirmngr_socket = strdup (value);
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else if (!strcmp (line, "agent-ssh-socket") && !dirinfo.agent_ssh_socket)
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dirinfo.agent_ssh_socket = strdup (value);
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}
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}
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/* Read the directory information from gpgconf. This function expects
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that DIRINFO_LOCK is held by the caller. PGNAME is the name of the
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gpgconf binary. If COMPONENTS is set, not the directories bit the
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name of the componeNts are read. */
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static void
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read_gpgconf_dirs (const char *pgmname, int components)
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{
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char linebuf[1024] = {0};
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int linelen = 0;
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char * argv[3];
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int rp[2];
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struct spawn_fd_item_s cfd[] = { {-1, 1 /* STDOUT_FILENO */, -1, 0},
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{-1, -1} };
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int status;
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int nread;
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char *mark = NULL;
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argv[0] = (char *)pgmname;
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argv[1] = (char*)(components? "--list-components" : "--list-dirs");
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argv[2] = NULL;
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if (_gpgme_io_pipe (rp, 1) < 0)
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return;
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cfd[0].fd = rp[1];
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status = _gpgme_io_spawn (pgmname, argv, IOSPAWN_FLAG_DETACHED,
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cfd, NULL, NULL, NULL);
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if (status < 0)
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{
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_gpgme_io_close (rp[0]);
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_gpgme_io_close (rp[1]);
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return;
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}
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do
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{
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nread = _gpgme_io_read (rp[0],
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linebuf + linelen,
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sizeof linebuf - linelen - 1);
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if (nread > 0)
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{
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char *line;
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const char *lastmark = NULL;
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size_t nused;
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linelen += nread;
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linebuf[linelen] = '\0';
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for (line=linebuf; (mark = strchr (line, '\n')); line = mark+1 )
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{
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lastmark = mark;
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if (mark > line && mark[-1] == '\r')
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mark[-1] = '\0';
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else
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mark[0] = '\0';
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parse_output (line, components);
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}
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nused = lastmark? (lastmark + 1 - linebuf) : 0;
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memmove (linebuf, linebuf + nused, linelen - nused);
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linelen -= nused;
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}
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}
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while (nread > 0 && linelen < sizeof linebuf - 1);
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_gpgme_io_close (rp[0]);
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}
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static const char *
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get_gpgconf_item (int what)
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{
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const char *result = NULL;
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LOCK (dirinfo_lock);
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if (!dirinfo.valid)
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{
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char *pgmname;
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pgmname = dirinfo.disable_gpgconf? NULL : _gpgme_get_gpgconf_path ();
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if (pgmname && _gpgme_access (pgmname, F_OK))
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{
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: gpgconf='%s' [not installed]", pgmname);
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free (pgmname);
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pgmname = NULL; /* Not available. */
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}
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else
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: gpgconf='%s'",
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pgmname? pgmname : "[null]");
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if (!pgmname)
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{
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/* Probably gpgconf is not installed. Assume we are using
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GnuPG-1. */
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dirinfo.gpg_one_mode = 1;
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pgmname = _gpgme_get_gpg_path ();
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if (pgmname)
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dirinfo.gpg_name = pgmname;
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}
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else
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{
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dirinfo.gpg_one_mode = 0;
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read_gpgconf_dirs (pgmname, 0);
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read_gpgconf_dirs (pgmname, 1);
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dirinfo.gpgconf_name = pgmname;
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}
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/* Even if the reading of the directories failed (e.g. due to an
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too old version gpgconf or no gpgconf at all), we need to
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mark the entries as valid so that we won't try over and over
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to read them. Note further that we are not able to change
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the read values later because they are practically statically
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allocated. */
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dirinfo.valid = 1;
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if (dirinfo.gpg_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: gpg='%s'",
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dirinfo.gpg_name);
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if (dirinfo.g13_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: g13='%s'",
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dirinfo.g13_name);
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if (dirinfo.gpgsm_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: gpgsm='%s'",
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dirinfo.gpgsm_name);
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if (dirinfo.keyboxd_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: keyboxd='%s'",
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dirinfo.keyboxd_name);
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if (dirinfo.agent_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: gpg-agent='%s'",
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dirinfo.agent_name);
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if (dirinfo.scdaemon_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: scdaemon='%s'",
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dirinfo.scdaemon_name);
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if (dirinfo.dirmngr_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: dirmngr='%s'",
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dirinfo.dirmngr_name);
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if (dirinfo.pinentry_name)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: pinentry='%s'",
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dirinfo.pinentry_name);
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if (dirinfo.homedir)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: homedir='%s'",
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dirinfo.homedir);
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if (dirinfo.socketdir)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: sockdir='%s'",
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dirinfo.socketdir);
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if (dirinfo.agent_socket)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: agent='%s'",
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dirinfo.agent_socket);
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if (dirinfo.agent_ssh_socket)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: ssh='%s'",
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dirinfo.agent_ssh_socket);
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if (dirinfo.dirmngr_socket)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: dirmngr='%s'",
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dirinfo.dirmngr_socket);
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if (dirinfo.uisrv_socket)
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_gpgme_debug (NULL, DEBUG_INIT, -1, NULL, NULL, NULL,
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"gpgme-dinfo: uisrv='%s'",
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dirinfo.uisrv_socket);
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}
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switch (what)
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{
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case WANT_HOMEDIR: result = dirinfo.homedir; break;
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case WANT_SYSCONFDIR: result = dirinfo.sysconfdir; break;
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case WANT_BINDIR: result = dirinfo.bindir; break;
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case WANT_LIBEXECDIR: result = dirinfo.libexecdir; break;
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case WANT_LIBDIR: result = dirinfo.libdir; break;
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case WANT_DATADIR: result = dirinfo.datadir; break;
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case WANT_LOCALEDIR: result = dirinfo.localedir; break;
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case WANT_SOCKETDIR: result = dirinfo.socketdir; break;
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case WANT_AGENT_SOCKET: result = dirinfo.agent_socket; break;
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case WANT_AGENT_SSH_SOCKET: result = dirinfo.agent_ssh_socket; break;
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case WANT_DIRMNGR_SOCKET: result = dirinfo.dirmngr_socket; break;
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case WANT_GPGCONF_NAME: result = dirinfo.gpgconf_name; break;
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case WANT_GPG_NAME: result = dirinfo.gpg_name; break;
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case WANT_GPGSM_NAME: result = dirinfo.gpgsm_name; break;
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case WANT_G13_NAME: result = dirinfo.g13_name; break;
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case WANT_KEYBOXD_NAME: result = dirinfo.keyboxd_name; break;
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case WANT_AGENT_NAME: result = dirinfo.agent_name; break;
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case WANT_SCDAEMON_NAME: result = dirinfo.scdaemon_name; break;
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case WANT_DIRMNGR_NAME: result = dirinfo.dirmngr_name; break;
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case WANT_PINENTRY_NAME: result = dirinfo.pinentry_name; break;
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case WANT_UISRV_SOCKET: result = dirinfo.uisrv_socket; break;
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case WANT_GPG_ONE_MODE: result = dirinfo.gpg_one_mode? "1":NULL; break;
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case WANT_GPG_WKS_CLIENT_NAME:
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if (!dirinfo.gpg_wks_client_name && dirinfo.libexecdir)
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dirinfo.gpg_wks_client_name = _gpgme_strconcat (dirinfo.libexecdir,
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DIRSEP_S,
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"gpg-wks-client",
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EXEEXT_S,
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NULL);
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result = dirinfo.gpg_wks_client_name;
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break;
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case WANT_GPGTAR_NAME:
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if (!dirinfo.gpgtar_name && dirinfo.bindir)
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dirinfo.gpgtar_name = _gpgme_strconcat (dirinfo.bindir,
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DIRSEP_S,
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"gpgtar",
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EXEEXT_S,
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NULL);
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result = dirinfo.gpgtar_name;
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break;
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}
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UNLOCK (dirinfo_lock);
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return result;
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}
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/* Return the default home directory. Returns NULL if not known. */
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const char *
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_gpgme_get_default_homedir (void)
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{
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return get_gpgconf_item (WANT_HOMEDIR);
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}
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/* Return the default gpg-agent socket name. Returns NULL if not known. */
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const char *
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_gpgme_get_default_agent_socket (void)
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{
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return get_gpgconf_item (WANT_AGENT_SOCKET);
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}
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/* Return the default gpg file name. Returns NULL if not known. */
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const char *
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_gpgme_get_default_gpg_name (void)
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{
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return get_gpgconf_item (WANT_GPG_NAME);
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}
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/* Return the default gpgsm file name. Returns NULL if not known. */
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const char *
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_gpgme_get_default_gpgsm_name (void)
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{
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return get_gpgconf_item (WANT_GPGSM_NAME);
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}
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/* Return the default g13 file name. Returns NULL if not known. */
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const char *
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_gpgme_get_default_g13_name (void)
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{
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return get_gpgconf_item (WANT_G13_NAME);
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}
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/* Return the default gpgconf file name. Returns NULL if not known. */
|
||
const char *
|
||
_gpgme_get_default_gpgconf_name (void)
|
||
{
|
||
return get_gpgconf_item (WANT_GPGCONF_NAME);
|
||
}
|
||
|
||
/* Return the default gpgtar file name. Returns NULL if not known. */
|
||
const char *
|
||
_gpgme_get_default_gpgtar_name (void)
|
||
{
|
||
return get_gpgconf_item (WANT_GPGTAR_NAME);
|
||
}
|
||
|
||
/* Return the default UI-server socket name. Returns NULL if not
|
||
known. */
|
||
const char *
|
||
_gpgme_get_default_uisrv_socket (void)
|
||
{
|
||
return get_gpgconf_item (WANT_UISRV_SOCKET);
|
||
}
|
||
|
||
/* Return true if we are in GnuPG-1 mode - i.e. no gpgconf and agent
|
||
being optional. */
|
||
int
|
||
_gpgme_in_gpg_one_mode (void)
|
||
{
|
||
return !!get_gpgconf_item (WANT_GPG_ONE_MODE);
|
||
}
|
||
|
||
|
||
|
||
/* Helper function to return the basename of the passed filename. */
|
||
const char *
|
||
_gpgme_get_basename (const char *name)
|
||
{
|
||
const char *s;
|
||
|
||
if (!name || !*name)
|
||
return name;
|
||
for (s = name + strlen (name) -1; s >= name; s--)
|
||
if (*s == '/'
|
||
#ifdef HAVE_W32_SYSTEM
|
||
|| *s == '\\' || *s == ':'
|
||
#endif
|
||
)
|
||
return s+1;
|
||
return name;
|
||
}
|
||
|
||
|
||
/* Return default values for various directories and file names. */
|
||
const char *
|
||
gpgme_get_dirinfo (const char *what)
|
||
{
|
||
if (!what)
|
||
return NULL;
|
||
else if (!strcmp (what, "homedir"))
|
||
return get_gpgconf_item (WANT_HOMEDIR);
|
||
else if (!strcmp (what, "agent-socket"))
|
||
return get_gpgconf_item (WANT_AGENT_SOCKET);
|
||
else if (!strcmp (what, "uiserver-socket"))
|
||
return get_gpgconf_item (WANT_UISRV_SOCKET);
|
||
else if (!strcmp (what, "gpgconf-name"))
|
||
return get_gpgconf_item (WANT_GPGCONF_NAME);
|
||
else if (!strcmp (what, "gpg-name"))
|
||
return get_gpgconf_item (WANT_GPG_NAME);
|
||
else if (!strcmp (what, "gpgsm-name"))
|
||
return get_gpgconf_item (WANT_GPGSM_NAME);
|
||
else if (!strcmp (what, "g13-name"))
|
||
return get_gpgconf_item (WANT_G13_NAME);
|
||
else if (!strcmp (what, "keyboxd-name"))
|
||
return get_gpgconf_item (WANT_KEYBOXD_NAME);
|
||
else if (!strcmp (what, "agent-name"))
|
||
return get_gpgconf_item (WANT_AGENT_NAME);
|
||
else if (!strcmp (what, "scdaemon-name"))
|
||
return get_gpgconf_item (WANT_SCDAEMON_NAME);
|
||
else if (!strcmp (what, "dirmngr-name"))
|
||
return get_gpgconf_item (WANT_DIRMNGR_NAME);
|
||
else if (!strcmp (what, "pinentry-name"))
|
||
return get_gpgconf_item (WANT_PINENTRY_NAME);
|
||
else if (!strcmp (what, "gpg-wks-client-name"))
|
||
return get_gpgconf_item (WANT_GPG_WKS_CLIENT_NAME);
|
||
else if (!strcmp (what, "gpgtar-name"))
|
||
return get_gpgconf_item (WANT_GPGTAR_NAME);
|
||
else if (!strcmp (what, "agent-ssh-socket"))
|
||
return get_gpgconf_item (WANT_AGENT_SSH_SOCKET);
|
||
else if (!strcmp (what, "dirmngr-socket"))
|
||
return get_gpgconf_item (WANT_DIRMNGR_SOCKET);
|
||
else if (!strcmp (what, "sysconfdir"))
|
||
return get_gpgconf_item (WANT_SYSCONFDIR);
|
||
else if (!strcmp (what, "bindir"))
|
||
return get_gpgconf_item (WANT_BINDIR);
|
||
else if (!strcmp (what, "libexecdir"))
|
||
return get_gpgconf_item (WANT_LIBEXECDIR);
|
||
else if (!strcmp (what, "libdir"))
|
||
return get_gpgconf_item (WANT_LIBDIR);
|
||
else if (!strcmp (what, "datadir"))
|
||
return get_gpgconf_item (WANT_DATADIR);
|
||
else if (!strcmp (what, "localedir"))
|
||
return get_gpgconf_item (WANT_LOCALEDIR);
|
||
else if (!strcmp (what, "socketdir"))
|
||
return get_gpgconf_item (WANT_SOCKETDIR);
|
||
else
|
||
return NULL;
|
||
}
|