gpgconf.c
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gpgconf.c
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	/* gpgconf.c - Configuration utility for GnuPG
	* Copyright (C) 2003, 2007, 2009, 2011 Free Software Foundation, Inc.
	* Copyright (C) 2016 g10 Code GmbH.
	*
	* 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 <https://www.gnu.org/licenses/>.
	* SPDX-License-Identifier: GPL-3.0-or-later
	*/

	#include <config.h>

	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	#define INCLUDED_BY_MAIN_MODULE 1
	#include "gpgconf.h"
	#include "../common/i18n.h"
	#include "../common/sysutils.h"
	#include "../common/init.h"
	#include "../common/status.h"
	#include "../common/exechelp.h"


	/* Constants to identify the commands and options. */
	enum cmd_and_opt_values
	{
	aNull = 0,
	oDryRun = 'n',
	oOutput = 'o',
	oQuiet = 'q',
	oVerbose = 'v',
	oRuntime = 'r',
	oComponent = 'c',
	oNull = '0',
	oNoVerbose = 500,
	oHomedir,
	oBuilddir,
	oStatusFD,
	oShowSocket,
	oChUid,

	aListComponents,
	aCheckPrograms,
	aListOptions,
	aChangeOptions,
	aCheckOptions,
	aApplyDefaults,
	aListConfig,
	aCheckConfig,
	aQuerySWDB,
	aListDirs,
	aLaunch,
	aKill,
	aCreateSocketDir,
	aRemoveSocketDir,
	aApplyProfile,
	aReload,
	aShowVersions,
	aShowCodepages
	};


	/* The list of commands and options. */
	static gpgrt_opt_t opts[] =
	{
	{ 300, NULL, 0, N_("@Commands:\n ") },

	{ aListComponents, "list-components", 256, N_("list all components") },
	{ aCheckPrograms, "check-programs", 256, N_("check all programs") },
	{ aListOptions, "list-options", 256, N_("\|COMPONENT\|list options") },
	{ aChangeOptions, "change-options", 256, N_("\|COMPONENT\|change options") },
	{ aCheckOptions, "check-options", 256, N_("\|COMPONENT\|check options") },
	{ aApplyDefaults, "apply-defaults", 256,
	N_("apply global default values") },
	{ aApplyProfile, "apply-profile", 256,
	N_("\|FILE\|update configuration files using FILE") },
	{ aListDirs, "list-dirs", 256,
	N_("get the configuration directories for @GPGCONF@") },
	{ aListConfig, "list-config", 256,
	N_("list global configuration file") },
	{ aCheckConfig, "check-config", 256,
	N_("check global configuration file") },
	{ aQuerySWDB, "query-swdb", 256,
	N_("query the software version database") },
	{ aReload, "reload", 256, N_("reload all or a given component")},
	{ aLaunch, "launch", 256, N_("launch a given component")},
	{ aKill, "kill", 256, N_("kill a given component")},
	{ aCreateSocketDir, "create-socketdir", 256, "@"},
	{ aRemoveSocketDir, "remove-socketdir", 256, "@"},
	ARGPARSE_c (aShowVersions, "show-versions", "@"),
	ARGPARSE_c (aShowCodepages, "show-codepages", "@"),

	{ 301, NULL, 0, N_("@\nOptions:\n ") },

	{ oOutput, "output", 2, N_("use as output file") },
	{ oVerbose, "verbose", 0, N_("verbose") },
	{ oQuiet, "quiet", 0, N_("quiet") },
	{ oDryRun, "dry-run", 0, N_("do not make any changes") },
	{ oRuntime, "runtime", 0, N_("activate changes at runtime, if possible") },
	ARGPARSE_s_i (oStatusFD, "status-fd",
	N_("\|FD\|write status info to this FD")),
	/* hidden options */
	{ oHomedir, "homedir", 2, "@" },
	{ oBuilddir, "build-prefix", 2, "@" },
	{ oNull, "null", 0, "@" },
	{ oNoVerbose, "no-verbose", 0, "@"},
	ARGPARSE_s_n (oShowSocket, "show-socket", "@"),
	ARGPARSE_s_s (oChUid, "chuid", "@"),

	ARGPARSE_end(),
	};


	/* The stream to output the status information. Status Output is disabled if
	* this is NULL. */
	static estream_t statusfp;

	static void show_versions (estream_t fp);



	/* Print usage information and provide strings for help. */
	static const char *
	my_strusage( int level )
	{
	const char *p;

	switch (level)
	{
	case 9: p = "GPL-3.0-or-later"; break;
	case 11: p = "@GPGCONF@ (@GNUPG@)";
	break;
	case 13: p = VERSION; break;
	case 14: p = GNUPG_DEF_COPYRIGHT_LINE; break;
	case 17: p = PRINTABLE_OS_NAME; break;
	case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;

	case 1:
	case 40: p = _("Usage: @GPGCONF@ [options] (-h for help)");
	break;
	case 41:
	p = _("Syntax: @GPGCONF@ [options]\n"
	"Manage configuration options for tools of the @GNUPG@ system\n");
	break;

	default: p = NULL; break;
	}
	return p;
	}


	/* Return the fp for the output. This is usually stdout unless
	--output has been used. In the latter case this function opens
	that file. */
	static estream_t
	get_outfp (estream_t *fp)
	{
	if (!*fp)
	{
	if (opt.outfile)
	{
	*fp = es_fopen (opt.outfile, "w");
	if (!*fp)
	gc_error (1, errno, "can not open '%s'", opt.outfile);
	}
	else
	*fp = es_stdout;
	}
	return *fp;
	}


	/* Set the status FD. */
	static void
	set_status_fd (int fd)
	{
	static int last_fd = -1;

	if (fd != -1 && last_fd == fd)
	return;

	if (statusfp && statusfp != es_stdout && statusfp != es_stderr)
	es_fclose (statusfp);
	statusfp = NULL;
	if (fd == -1)
	return;

	if (fd == 1)
	statusfp = es_stdout;
	else if (fd == 2)
	statusfp = es_stderr;
	else
	statusfp = es_fdopen (fd, "w");
	if (!statusfp)
	{
	log_fatal ("can't open fd %d for status output: %s\n",
	fd, gpg_strerror (gpg_error_from_syserror ()));
	}
	last_fd = fd;
	}


	/* Write a status line with code NO followed by the output of the
	* printf style FORMAT. The caller needs to make sure that LFs and
	* CRs are not printed. */
	void
	gpgconf_write_status (int no, const char *format, ...)
	{
	va_list arg_ptr;

	if (!statusfp)
	return; /* Not enabled. */

	es_fputs ("[GNUPG:] ", statusfp);
	es_fputs (get_status_string (no), statusfp);
	if (format)
	{
	es_putc (' ', statusfp);
	va_start (arg_ptr, format);
	es_vfprintf (statusfp, format, arg_ptr);
	va_end (arg_ptr);
	}
	es_putc ('\n', statusfp);
	}


	static void
	list_dirs (estream_t fp, char **names)
	{
	static struct {
	const char *name;
	const char (fnc)(void);
	const char *extra;
	} list[] = {
	{ "sysconfdir", gnupg_sysconfdir, NULL },
	{ "bindir", gnupg_bindir, NULL },
	{ "libexecdir", gnupg_libexecdir, NULL },
	{ "libdir", gnupg_libdir, NULL },
	{ "datadir", gnupg_datadir, NULL },
	{ "localedir", gnupg_localedir, NULL },
	{ "socketdir", gnupg_socketdir, NULL },
	{ "dirmngr-socket", dirmngr_socket_name, NULL,},
	{ "keyboxd-socket", keyboxd_socket_name, NULL,},
	{ "agent-ssh-socket", gnupg_socketdir, GPG_AGENT_SSH_SOCK_NAME },
	{ "agent-extra-socket", gnupg_socketdir, GPG_AGENT_EXTRA_SOCK_NAME },
	{ "agent-browser-socket",gnupg_socketdir, GPG_AGENT_BROWSER_SOCK_NAME },
	{ "agent-socket", gnupg_socketdir, GPG_AGENT_SOCK_NAME },
	{ "homedir", gnupg_homedir, NULL }
	};
	int idx, j;
	char *tmp;
	const char *s;


	for (idx = 0; idx < DIM (list); idx++)
	{
	s = list[idx].fnc ();
	if (list[idx].extra)
	{
	tmp = make_filename (s, list[idx].extra, NULL);
	s = tmp;
	}
	else
	tmp = NULL;
	if (!names)
	es_fprintf (fp, "%s:%s\n", list[idx].name, gc_percent_escape (s));
	else
	{
	for (j=0; names[j]; j++)
	if (!strcmp (names[j], list[idx].name))
	{
	es_fputs (s, fp);
	es_putc (opt.null? '\0':'\n', fp);
	}
	}

	xfree (tmp);
	}


	#ifdef HAVE_W32_SYSTEM
	tmp = read_w32_registry_string (NULL,
	GNUPG_REGISTRY_DIR,
	"HomeDir");
	if (tmp)
	{
	es_fflush (fp);
	log_info ("Warning: homedir taken from registry key (%s %s)\n",
	GNUPG_REGISTRY_DIR, "HomeDir");
	xfree (tmp);
	}
	#endif /HAVE_W32_SYSTEM/
	}



	/* Check whether NAME is valid argument for query_swdb(). Valid names
	* start with a letter and contain only alphanumeric characters or an
	* underscore. */
	static int
	valid_swdb_name_p (const char *name)
	{
	if (!name \|\| !*name \|\| !alphap (name))
	return 0;

	for (name++; *name; name++)
	if (!alnump (name) && *name != '_')
	return 0;

	return 1;
	}


	/* Query the SWDB file. If necessary and possible this functions asks
	* the dirmngr to load an updated version of that file. The caller
	* needs to provide the NAME to query (e.g. "gnupg", "libgcrypt") and
	* optional the currently installed version in CURRENT_VERSION. The
	* output written to OUT is a colon delimited line with these fields:
	*
	* name :: The name of the package
	* curvers:: The installed version if given.
	* status :: This value tells the status of the software package
	* '-' :: No information available
	* (error or CURRENT_VERSION not given)
	* '?' :: Unknown NAME
	* 'u' :: Update available
	* 'c' :: The version is Current
	* 'n' :: The current version is already Newer than the
	* available one.
	* urgency :: If the value is greater than zero an urgent update is required.
	* error :: 0 on success or an gpg_err_code_t
	* Common codes seen:
	* GPG_ERR_TOO_OLD :: The SWDB file is to old to be used.
	* GPG_ERR_ENOENT :: The SWDB file is not available.
	* GPG_ERR_BAD_SIGNATURE :: Corrupted SWDB file.
	* filedate:: Date of the swdb file (yyyymmddThhmmss)
	* verified:: Date we checked the validity of the file (yyyyymmddThhmmss)
	* version :: The version string from the swdb.
	* reldate :: Release date of that version (yyyymmddThhmmss)
	* size :: Size of the package in bytes.
	* hash :: SHA-2 hash of the package.
	*
	*/
	static void
	query_swdb (estream_t out, const char name, const char current_version)
	{
	gpg_error_t err;
	const char *search_name;
	char *fname = NULL;
	estream_t fp = NULL;
	char *line = NULL;
	char *self_version = NULL;
	size_t length_of_line = 0;
	size_t maxlen;
	ssize_t len;
	const char *fields[2];
	char *p;
	gnupg_isotime_t filedate = {0};
	gnupg_isotime_t verified = {0};
	char *value_ver = NULL;
	gnupg_isotime_t value_date = {0};
	char *value_size = NULL;
	char *value_sha2 = NULL;
	unsigned long value_size_ul = 0;
	int status, i;


	if (!valid_swdb_name_p (name))
	{
	log_error ("error in package name '%s': %s\n",
	name, gpg_strerror (GPG_ERR_INV_NAME));
	goto leave;
	}
	if (!strcmp (name, "gnupg"))
	search_name = GNUPG_SWDB_TAG;
	else if (!strcmp (name, "gnupg1"))
	search_name = "gnupg1";
	else
	search_name = name;

	if (!current_version && !strcmp (name, "gnupg"))
	{
	/* Use our own version but string a possible beta string. */
	self_version = xstrdup (PACKAGE_VERSION);
	p = strchr (self_version, '-');
	if (p)
	*p = 0;
	current_version = self_version;
	}

	if (current_version && (strchr (current_version, ':')
	\|\| compare_version_strings (current_version, NULL)))
	{
	log_error ("error in version string '%s': %s\n",
	current_version, gpg_strerror (GPG_ERR_INV_ARG));
	goto leave;
	}

	fname = make_filename (gnupg_homedir (), "swdb.lst", NULL);
	fp = es_fopen (fname, "r");
	if (!fp)
	{
	err = gpg_error_from_syserror ();
	es_fprintf (out, "%s:%s:-::%u:::::::\n",
	name,
	current_version? current_version : "",
	gpg_err_code (err));
	if (gpg_err_code (err) != GPG_ERR_ENOENT)
	log_error (_("error opening '%s': %s\n"), fname, gpg_strerror (err));
	goto leave;
	}

	/* Note that the parser uses the first occurrence of a matching
	* values and ignores possible duplicated values. */

	maxlen = 2048; /* Set limit. */
	while ((len = es_read_line (fp, &line, &length_of_line, &maxlen)) > 0)
	{
	if (!maxlen)
	{
	err = gpg_error (GPG_ERR_LINE_TOO_LONG);
	log_error (_("error reading '%s': %s\n"), fname, gpg_strerror (err));
	goto leave;
	}
	/* Strip newline and carriage return, if present. */
	while (len > 0 && (line[len - 1] == '\n' \|\| line[len - 1] == '\r'))
	line[--len] = '\0';

	if (split_fields (line, fields, DIM (fields)) < DIM(fields))
	continue; /* Skip empty lines and names w/o a value. */
	if (*fields[0] == '#')
	continue; /* Skip comments. */

	/* Record the meta data. */
	if (!*filedate && !strcmp (fields[0], ".filedate"))
	{
	string2isotime (filedate, fields[1]);
	continue;
	}
	if (!*verified && !strcmp (fields[0], ".verified"))
	{
	string2isotime (verified, fields[1]);
	continue;
	}

	/* Tokenize the name. */
	p = strrchr (fields[0], '_');
	if (!p)
	continue; /* Name w/o an underscore. */
	*p++ = 0;

	/* Wait for the requested name. */
	if (!strcmp (fields[0], search_name))
	{
	if (!strcmp (p, "ver") && !value_ver)
	value_ver = xstrdup (fields[1]);
	else if (!strcmp (p, "date") && !*value_date)
	string2isotime (value_date, fields[1]);
	else if (!strcmp (p, "size") && !value_size)
	value_size = xstrdup (fields[1]);
	else if (!strcmp (p, "sha2") && !value_sha2)
	value_sha2 = xstrdup (fields[1]);
	}
	}
	if (len < 0 \|\| es_ferror (fp))
	{
	err = gpg_error_from_syserror ();
	log_error (_("error reading '%s': %s\n"), fname, gpg_strerror (err));
	goto leave;
	}

	if (!filedate \|\| !verified)
	{
	err = gpg_error (GPG_ERR_INV_TIME);
	es_fprintf (out, "%s:%s:-::%u:::::::\n",
	name,
	current_version? current_version : "",
	gpg_err_code (err));
	goto leave;
	}

	if (!value_ver)
	{
	es_fprintf (out, "%s:%s:?:::::::::\n",
	name,
	current_version? current_version : "");
	goto leave;
	}

	if (value_size)
	{
	gpg_err_set_errno (0);
	value_size_ul = strtoul (value_size, &p, 10);
	if (errno)
	value_size_ul = 0;
	else if (*p == 'k')
	value_size_ul *= 1024;
	}

	err = 0;
	status = '-';
	if (compare_version_strings (value_ver, NULL))
	err = gpg_error (GPG_ERR_INV_VALUE);
	else if (!current_version)
	;
	else if (!(i = compare_version_strings (value_ver, current_version)))
	status = 'c';
	else if (i > 0)
	status = 'u';
	else
	status = 'n';

	es_fprintf (out, "%s:%s:%c::%d:%s:%s:%s:%s:%lu:%s:\n",
	name,
	current_version? current_version : "",
	status,
	err,
	filedate,
	verified,
	value_ver,
	value_date,
	value_size_ul,
	value_sha2? value_sha2 : "");

	leave:
	xfree (value_ver);
	xfree (value_size);
	xfree (value_sha2);
	xfree (line);
	es_fclose (fp);
	xfree (fname);
	xfree (self_version);
	}


	/* gpgconf main. */
	int
	main (int argc, char **argv)
	{
	gpg_error_t err;
	gpgrt_argparse_t pargs;
	const char *fname;
	int no_more_options = 0;
	enum cmd_and_opt_values cmd = 0;
	estream_t outfp = NULL;
	int show_socket = 0;
	const char *changeuser = NULL;

	early_system_init ();
	gnupg_reopen_std (GPGCONF_NAME);
	gpgrt_set_strusage (my_strusage);
	log_set_prefix (GPGCONF_NAME, GPGRT_LOG_WITH_PREFIX);

	/* Make sure that our subsystems are ready. */
	i18n_init();
	init_common_subsystems (&argc, &argv);
	gc_components_init ();

	/* Parse the command line. */
	pargs.argc = &argc;
	pargs.argv = &argv;
	pargs.flags = ARGPARSE_FLAG_KEEP;
	while (!no_more_options && gpgrt_argparse (NULL, &pargs, opts))
	{
	switch (pargs.r_opt)
	{
	case oOutput: opt.outfile = pargs.r.ret_str; break;
	case oQuiet: opt.quiet = 1; break;
	case oDryRun: opt.dry_run = 1; break;
	case oRuntime: opt.runtime = 1; break;
	case oVerbose: opt.verbose++; break;
	case oNoVerbose: opt.verbose = 0; break;
	case oHomedir: gnupg_set_homedir (pargs.r.ret_str); break;
	case oBuilddir: gnupg_set_builddir (pargs.r.ret_str); break;
	case oNull: opt.null = 1; break;
	case oStatusFD:
	set_status_fd (translate_sys2libc_fd_int (pargs.r.ret_int, 1));
	break;
	case oShowSocket: show_socket = 1; break;
	case oChUid: changeuser = pargs.r.ret_str; break;

	case aListDirs:
	case aListComponents:
	case aCheckPrograms:
	case aListOptions:
	case aChangeOptions:
	case aCheckOptions:
	case aApplyDefaults:
	case aApplyProfile:
	case aListConfig:
	case aCheckConfig:
	case aQuerySWDB:
	case aReload:
	case aLaunch:
	case aKill:
	case aCreateSocketDir:
	case aRemoveSocketDir:
	case aShowVersions:
	case aShowCodepages:
	cmd = pargs.r_opt;
	break;

	default: pargs.err = 2; break;
	}
	}

	gpgrt_argparse (NULL, &pargs, NULL); /* Release internal state. */

	if (log_get_errorcount (0))
	gpgconf_failure (GPG_ERR_USER_2);

	/* Print a warning if an argument looks like an option. */
	if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN))
	{
	int i;

	for (i=0; i < argc; i++)
	if (argv[i][0] == '-' && argv[i][1] == '-')
	log_info (_("Note: '%s' is not considered an option\n"), argv[i]);
	}

	fname = argc ? *argv : NULL;

	/* If requested switch to the requested user or die. */
	if (changeuser && (err = gnupg_chuid (changeuser, 0)))
	gpgconf_failure (err);

	/* Set the configuraton directories for use by gpgrt_argparser. We
	* don't have a configuration file for this program but we have code
	* which reads the component's config files. */
	gpgrt_set_confdir (GPGRT_CONFDIR_SYS, gnupg_sysconfdir ());
	gpgrt_set_confdir (GPGRT_CONFDIR_USER, gnupg_homedir ());

	switch (cmd)
	{
	case aListComponents:
	default:
	/* List all components. */
	gc_component_list_components (get_outfp (&outfp));
	break;

	case aCheckPrograms:
	/* Check all programs. */
	gc_check_programs (get_outfp (&outfp));
	break;

	case aListOptions:
	case aChangeOptions:
	case aCheckOptions:
	if (!fname)
	{
	es_fprintf (es_stderr, _("usage: %s [options] "), GPGCONF_NAME);
	es_putc ('\n', es_stderr);
	es_fputs (_("Need one component argument"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (GPG_ERR_USER_2);
	}
	else
	{
	int idx = gc_component_find (fname);
	if (idx < 0)
	{
	es_fputs (_("Component not found"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (0);
	}
	if (cmd == aCheckOptions)
	gc_component_check_options (idx, get_outfp (&outfp), NULL);
	else
	{
	gc_component_retrieve_options (idx);
	if (gc_process_gpgconf_conf (NULL, 1, 0, NULL))
	gpgconf_failure (0);
	if (cmd == aListOptions)
	gc_component_list_options (idx, get_outfp (&outfp));
	else if (cmd == aChangeOptions)
	gc_component_change_options (idx, es_stdin,
	get_outfp (&outfp), 0);
	}
	}
	break;

	case aLaunch:
	case aKill:
	if (!fname)
	{
	es_fprintf (es_stderr, _("usage: %s [options] "), GPGCONF_NAME);
	es_putc ('\n', es_stderr);
	es_fputs (_("Need one component argument"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (GPG_ERR_USER_2);
	}
	else if (!strcmp (fname, "all"))
	{
	if (cmd == aLaunch)
	{
	if (gc_component_launch (-1))
	gpgconf_failure (0);
	}
	else
	{
	gc_component_kill (-1);
	}
	}
	else
	{
	/* Launch/Kill a given component. */
	int idx;

	idx = gc_component_find (fname);
	if (idx < 0)
	{
	es_fputs (_("Component not found"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (0);
	}
	else if (cmd == aLaunch)
	{
	err = gc_component_launch (idx);
	if (show_socket)
	{
	char *names[2];

	if (idx == GC_COMPONENT_GPG_AGENT)
	names[0] = "agent-socket";
	else if (idx == GC_COMPONENT_DIRMNGR)
	names[0] = "dirmngr-socket";
	else if (idx == GC_COMPONENT_KEYBOXD)
	names[0] = "keyboxd-socket";
	else
	names[0] = NULL;
	names[1] = NULL;
	get_outfp (&outfp);
	list_dirs (outfp, names);
	}
	if (err)
	gpgconf_failure (0);
	}
	else
	{
	/* We don't error out if the kill failed because this
	command should do nothing if the component is not
	running. */
	gc_component_kill (idx);
	}
	}
	break;

	case aReload:
	if (!fname \|\| !strcmp (fname, "all"))
	{
	/* Reload all. */
	gc_component_reload (-1);
	}
	else
	{
	/* Reload given component. */
	int idx;

	idx = gc_component_find (fname);
	if (idx < 0)
	{
	es_fputs (_("Component not found"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (0);
	}
	else
	{
	gc_component_reload (idx);
	}
	}
	break;

	case aListConfig:
	if (gc_process_gpgconf_conf (fname, 0, 0, get_outfp (&outfp)))
	gpgconf_failure (0);
	break;

	case aCheckConfig:
	if (gc_process_gpgconf_conf (fname, 0, 0, NULL))
	gpgconf_failure (0);
	break;

	case aApplyDefaults:
	if (fname)
	{
	es_fprintf (es_stderr, _("usage: %s [options] "), GPGCONF_NAME);
	es_putc ('\n', es_stderr);
	es_fputs (_("No argument allowed"), es_stderr);
	es_putc ('\n', es_stderr);
	gpgconf_failure (GPG_ERR_USER_2);
	}
	gc_component_retrieve_options (-1);
	if (gc_process_gpgconf_conf (NULL, 1, 1, NULL))
	gpgconf_failure (0);
	break;

	case aApplyProfile:
	gc_component_retrieve_options (-1);
	if (gc_apply_profile (fname))
	gpgconf_failure (0);
	break;

	case aListDirs:
	/* Show the system configuration directories for gpgconf. */
	get_outfp (&outfp);
	list_dirs (outfp, argc? argv : NULL);
	break;

	case aQuerySWDB:
	/* Query the software version database. */
	if (!fname \|\| argc > 2)
	{
	es_fprintf (es_stderr, "usage: %s --query-swdb NAME [VERSION]\n",
	GPGCONF_NAME);
	gpgconf_failure (GPG_ERR_USER_2);
	}
	get_outfp (&outfp);
	query_swdb (outfp, fname, argc > 1? argv[1] : NULL);
	break;

	case aCreateSocketDir:
	{
	char *socketdir;
	unsigned int flags;

	/* Make sure that the top /run/user/UID/gnupg dir has been
	* created. */
	gnupg_socketdir ();

	/* Check the /var/run dir. */
	socketdir = _gnupg_socketdir_internal (1, &flags);
	if ((flags & 64) && !opt.dry_run)
	{
	/* No sub dir - create it. */
	if (gnupg_mkdir (socketdir, "-rwx"))
	gc_error (1, errno, "error creating '%s'", socketdir);
	/* Try again. */
	xfree (socketdir);
	socketdir = _gnupg_socketdir_internal (1, &flags);
	}

	/* Give some info. */
	if ( (flags & ~32) \|\| opt.verbose \|\| opt.dry_run)
	{
	log_info ("socketdir is '%s'\n", socketdir);
	if ((flags & 1)) log_info ("\tgeneral error\n");
	if ((flags & 2)) log_info ("\tno /run/user dir\n");
	if ((flags & 4)) log_info ("\tbad permissions\n");
	if ((flags & 8)) log_info ("\tbad permissions (subdir)\n");
	if ((flags & 16)) log_info ("\tmkdir failed\n");
	if ((flags & 32)) log_info ("\tnon-default homedir\n");
	if ((flags & 64)) log_info ("\tno such subdir\n");
	if ((flags & 128)) log_info ("\tusing homedir as fallback\n");
	}

	if ((flags & ~32) && !opt.dry_run)
	gc_error (1, 0, "error creating socket directory");

	xfree (socketdir);
	}
	break;

	case aRemoveSocketDir:
	{
	char *socketdir;
	unsigned int flags;

	/* Check the /var/run dir. */
	socketdir = _gnupg_socketdir_internal (1, &flags);
	if ((flags & 128))
	log_info ("ignoring request to remove non /run/user socket dir\n");
	else if (opt.dry_run)
	;
	else if (rmdir (socketdir))
	{
	/* If the director is not empty we first try to delete
	* socket files. */
	err = gpg_error_from_syserror ();
	if (gpg_err_code (err) == GPG_ERR_ENOTEMPTY
	\|\| gpg_err_code (err) == GPG_ERR_EEXIST)
	{
	static const char * const names[] = {
	GPG_AGENT_SOCK_NAME,
	GPG_AGENT_EXTRA_SOCK_NAME,
	GPG_AGENT_BROWSER_SOCK_NAME,
	GPG_AGENT_SSH_SOCK_NAME,
	SCDAEMON_SOCK_NAME,
	KEYBOXD_SOCK_NAME,
	DIRMNGR_SOCK_NAME
	};
	int i;
	char *p;

	for (i=0; i < DIM(names); i++)
	{
	p = strconcat (socketdir , "/", names[i], NULL);
	if (p)
	gnupg_remove (p);
	xfree (p);
	}
	if (rmdir (socketdir))
	gc_error (1, 0, "error removing '%s': %s",
	socketdir, gpg_strerror (err));
	}
	else if (gpg_err_code (err) == GPG_ERR_ENOENT)
	gc_error (0, 0, "warning: removing '%s' failed: %s",
	socketdir, gpg_strerror (err));
	else
	gc_error (1, 0, "error removing '%s': %s",
	socketdir, gpg_strerror (err));
	}

	xfree (socketdir);
	}
	break;

	case aShowVersions:
	{
	get_outfp (&outfp);
	show_versions (outfp);
	}
	break;

	case aShowCodepages:
	#ifdef HAVE_W32_SYSTEM
	{
	get_outfp (&outfp);
	es_fprintf (outfp, "Console: CP%u\n", GetConsoleOutputCP ());
	es_fprintf (outfp, "ANSI: CP%u\n", GetACP ());
	es_fprintf (outfp, "OEM: CP%u\n", GetOEMCP ());
	}
	#endif
	break;


	}

	if (outfp != es_stdout)
	if (es_fclose (outfp))
	gc_error (1, errno, "error closing '%s'", opt.outfile);


	if (log_get_errorcount (0))
	gpgconf_failure (0);
	else
	gpgconf_write_status (STATUS_SUCCESS, NULL);
	return 0;
	}


	void
	gpgconf_failure (gpg_error_t err)
	{
	log_flush ();
	if (!err)
	err = gpg_error (GPG_ERR_GENERAL);
	gpgconf_write_status
	(STATUS_FAILURE, "- %u",
	gpg_err_code (err) == GPG_ERR_USER_2? GPG_ERR_EINVAL : err);
	exit (gpg_err_code (err) == GPG_ERR_USER_2? 2 : 1);
	}



	/* Parse the revision part from the extended version blurb. */
	static const char *
	get_revision_from_blurb (const char blurb, int r_len)
	{
	const char *s = blurb? blurb : "";
	int n;

	for (; *s; s++)
	if (*s == '\n' && s[1] == '(')
	break;
	if (s)
	{
	s += 2;
	for (n=0; s[n] && s[n] != ' '; n++)
	;
	}
	else
	{
	s = "?";
	n = 1;
	}
	*r_len = n;
	return s;
	}


	static void
	show_version_gnupg (estream_t fp)
	{
	es_fprintf (fp, "* GnuPG %s (%s)\n%s\n",
	gpgrt_strusage (13), BUILD_REVISION, gpgrt_strusage (17));
	#ifdef HAVE_W32_SYSTEM
	{
	OSVERSIONINFO osvi = { sizeof (osvi) };

	GetVersionEx (&osvi);
	es_fprintf (fp, "Windows %lu.%lu build %lu%s%s%s\n",
	(unsigned long)osvi.dwMajorVersion,
	(unsigned long)osvi.dwMinorVersion,
	(unsigned long)osvi.dwBuildNumber,
	*osvi.szCSDVersion? " (":"",
	osvi.szCSDVersion,
	*osvi.szCSDVersion? ")":""
	);
	}
	#endif /HAVE_W32_SYSTEM/
	}


	static void
	show_version_libgcrypt (estream_t fp)
	{
	const char *s;
	int n;

	s = get_revision_from_blurb (gcry_check_version ("\x01\x01"), &n);
	es_fprintf (fp, "* Libgcrypt %s (%.*s)\n",
	gcry_check_version (NULL), n, s);
	#if GCRYPT_VERSION_NUMBER >= 0x010800
	s = gcry_get_config (0, NULL);
	if (s)
	es_fputs (s, fp);
	#endif
	}


	static void
	show_version_gpgrt (estream_t fp)
	{
	const char *s;
	int n;

	s = get_revision_from_blurb (gpg_error_check_version ("\x01\x01"), &n);
	es_fprintf (fp, "* GpgRT %s (%.*s)\n",
	gpg_error_check_version (NULL), n, s);
	}


	/* Printing version information for other libraries is problematic
	* because we don't want to link gpgconf to all these libraries. The
	* best solution is delegating this to dirmngr which uses libassuan,
	* libksba, libnpth and ntbtls anyway. */
	static void
	show_versions_via_dirmngr (estream_t fp)
	{
	gpg_error_t err;
	const char *pgmname;
	const char *argv[2];
	estream_t outfp;
	pid_t pid;
	char *line = NULL;
	size_t line_len = 0;
	ssize_t length;
	int exitcode;

	pgmname = gnupg_module_name (GNUPG_MODULE_NAME_DIRMNGR);
	argv[0] = "--gpgconf-versions";
	argv[1] = NULL;
	err = gnupg_spawn_process (pgmname, argv, NULL, NULL, 0,
	NULL, &outfp, NULL, &pid);
	if (err)
	{
	log_error ("error spawning %s: %s", pgmname, gpg_strerror (err));
	es_fprintf (fp, "[error: can't get further info]\n");
	return;
	}

	while ((length = es_read_line (outfp, &line, &line_len, NULL)) > 0)
	{
	/* Strip newline and carriage return, if present. */
	while (length > 0
	&& (line[length - 1] == '\n' \|\| line[length - 1] == '\r'))
	line[--length] = '\0';
	es_fprintf (fp, "%s\n", line);
	}
	if (length < 0 \|\| es_ferror (outfp))
	{
	err = gpg_error_from_syserror ();
	log_error ("error reading from %s: %s\n", pgmname, gpg_strerror (err));
	}
	if (es_fclose (outfp))
	{
	err = gpg_error_from_syserror ();
	log_error ("error closing output stream of %s: %s\n",
	pgmname, gpg_strerror (err));
	}

	err = gnupg_wait_process (pgmname, pid, 1, &exitcode);
	if (err)
	{
	log_error ("running %s failed (exitcode=%d): %s\n",
	pgmname, exitcode, gpg_strerror (err));
	es_fprintf (fp, "[error: can't get further info]\n");
	}
	gnupg_release_process (pid);
	xfree (line);
	}


	/* Show all kind of version information. */
	static void
	show_versions (estream_t fp)
	{
	show_version_gnupg (fp);
	es_fputc ('\n', fp);
	show_version_libgcrypt (fp);
	es_fputc ('\n', fp);
	show_version_gpgrt (fp);
	es_fputc ('\n', fp);
	show_versions_via_dirmngr (fp);
	}

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