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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.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_LIBCONFIG
#include <libconfig.h>
#endif
#include "guestfs.h"
#include "options.h"
static const char *home_filename = /* $HOME/ */ ".libguestfs-tools.rc";
static const char *etc_filename = "/etc/libguestfs-tools.conf";
#ifdef HAVE_LIBCONFIG
/* Note that parse_config is called very early, before command line
* parsing and before the verbose flag has been set.
*/
void
parse_config (void)
{
const char *home;
size_t len;
char *path;
FILE *fp;
config_t conf;
config_init (&conf);
/* Try $HOME first. */
home = getenv ("HOME");
if (home != NULL) {
len = strlen (home) + 1 + strlen (home_filename) + 1;
path = malloc (len);
if (path == NULL) {
perror ("malloc");
exit (EXIT_FAILURE);
}
snprintf (path, len, "%s/%s", home, home_filename);
fp = fopen (path, "r");
if (fp != NULL) {
/*
if (verbose)
fprintf (stderr, "%s: reading configuration from %s\n",
program_name, path);
*/
if (config_read (&conf, fp) == CONFIG_FALSE) {
fprintf (stderr,
_("%s: %s: line %d: error parsing configuration file: %s\n"),
program_name, path, config_error_line (&conf),
config_error_text (&conf));
exit (EXIT_FAILURE);
}
if (fclose (fp) == -1) {
perror (path);
exit (EXIT_FAILURE);
}
/* Notes:
*
* (1) It's not obvious from the documentation, that config_read
* completely resets the 'conf' structure. This means we cannot
* call config_read twice on the two possible configuration
* files, but instead have to copy out settings into our
* variables between calls.
*
* (2) If the next call fails then 'read_only' variable is not
* updated. Failure could happen just because the setting is
* missing from the configuration file, so we ignore it here.
*/
config_lookup_bool (&conf, "read_only", &read_only);
}
free (path);
}
fp = fopen (etc_filename, "r");
if (fp != NULL) {
/*
if (verbose)
fprintf (stderr, "%s: reading configuration from %s\n",
program_name, etc_filename);
*/
if (config_read (&conf, fp) == CONFIG_FALSE) {
fprintf (stderr,
_("%s: %s: line %d: error parsing configuration file: %s\n"),
program_name, etc_filename, config_error_line (&conf),
config_error_text (&conf));
exit (EXIT_FAILURE);
}
if (fclose (fp) == -1) {
perror (path);
exit (EXIT_FAILURE);
}
config_lookup_bool (&conf, "read_only", &read_only);
}
config_destroy (&conf);
}
#else /* !HAVE_LIBCONFIG */
void
parse_config (void)
{
/*
if (verbose)
fprintf (stderr,
_("%s: compiled without libconfig, guestfish configuration file ignored\n"),
program_name);
*/
}
#endif /* !HAVE_LIBCONFIG */
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