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/* libguestfs - guestfish and guestmount shared option parsing
* Copyright (C) 2011 Red Hat Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/**
* This file parses the guestfish configuration file, usually
* F<~/.libguestfs-tools.rc> or F</etc/libguestfs-tools.conf>.
*
* Note that C<parse_config> is called very early, before command line
* parsing, before the C<verbose> flag has been set, even before the
* global handle C<g> is opened.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <error.h>
#include <libintl.h>
#ifdef HAVE_LIBCONFIG
#include <libconfig.h>
#endif
#include "getprogname.h"
#include "guestfs.h"
#include "options.h"
#ifdef HAVE_LIBCONFIG
#define GLOBAL_CONFIG_FILENAME "libguestfs-tools.conf"
static const char home_filename[] = /* $HOME/ */ ".libguestfs-tools.rc";
static const char etc_filename[] = "/etc/" GLOBAL_CONFIG_FILENAME;
static void
read_config_from_file (const char *filename)
{
FILE *fp;
fp = fopen (filename, "r");
if (fp != NULL) {
config_t conf;
config_init (&conf);
/*
if (verbose)
fprintf (stderr, "%s: reading configuration from %s\n",
getprogname (), filename);
*/
if (config_read (&conf, fp) == CONFIG_FALSE)
error (EXIT_FAILURE, 0,
_("%s: line %d: error parsing configuration file: %s"),
filename, config_error_line (&conf), config_error_text (&conf));
if (fclose (fp) == -1)
error (EXIT_FAILURE, errno, "fclose: %s", filename);
config_lookup_bool (&conf, "read_only", &read_only);
config_destroy (&conf);
}
}
void
parse_config (void)
{
const char *home;
/* Try the global configuration first. */
read_config_from_file (etc_filename);
{
/* Then read the configuration from XDG system paths. */
const char *xdg_env, *var;
CLEANUP_FREE_STRING_LIST char **xdg_config_dirs = NULL;
size_t xdg_config_dirs_count;
xdg_env = getenv ("XDG_CONFIG_DIRS");
var = xdg_env != NULL && xdg_env[0] != 0 ? xdg_env : "/etc/xdg";
xdg_config_dirs = guestfs_int_split_string (':', var);
xdg_config_dirs_count = guestfs_int_count_strings (xdg_config_dirs);
for (size_t i = xdg_config_dirs_count; i > 0; --i) {
CLEANUP_FREE char *path = NULL;
const char *dir = xdg_config_dirs[i - 1];
if (asprintf (&path, "%s/libguestfs/" GLOBAL_CONFIG_FILENAME, dir) == -1)
error (EXIT_FAILURE, errno, "asprintf");
read_config_from_file (path);
}
}
/* Read the configuration from $HOME, to override system settings. */
home = getenv ("HOME");
if (home != NULL) {
{
/* Old-style configuration file first. */
CLEANUP_FREE char *path = NULL;
if (asprintf (&path, "%s/%s", home, home_filename) == -1)
error (EXIT_FAILURE, errno, "asprintf");
read_config_from_file (path);
}
{
/* Then, XDG_CONFIG_HOME path. */
CLEANUP_FREE char *path = NULL;
CLEANUP_FREE char *home_copy = strdup (home);
const char *xdg_env;
if (home_copy == NULL)
error (EXIT_FAILURE, errno, "strdup");
xdg_env = getenv ("XDG_CONFIG_HOME");
if (xdg_env == NULL) {
if (asprintf (&path, "%s/.config/libguestfs/" GLOBAL_CONFIG_FILENAME,
home_copy) == -1)
error (EXIT_FAILURE, errno, "asprintf");
} else {
if (asprintf (&path, "%s/libguestfs/" GLOBAL_CONFIG_FILENAME,
xdg_env) == -1)
error (EXIT_FAILURE, errno, "asprintf");
}
read_config_from_file (path);
}
}
}
#else /* !HAVE_LIBCONFIG */
void
parse_config (void)
{
/*
if (verbose)
fprintf (stderr,
_("%s: compiled without libconfig, guestfish configuration file ignored\n"),
getprogname ());
*/
}
#endif /* !HAVE_LIBCONFIG */
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