mirror of
https://github.com/libguestfs/libguestfs.git
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141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/* libguestfs - guestfish and guestmount shared option parsing
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* Copyright (C) 2011 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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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 <libintl.h>
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#ifdef HAVE_LIBCONFIG
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#include <libconfig.h>
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#endif
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#include "guestfs.h"
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#include "options.h"
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#ifdef HAVE_LIBCONFIG
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static const char *home_filename = /* $HOME/ */ ".libguestfs-tools.rc";
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static const char *etc_filename = "/etc/libguestfs-tools.conf";
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/* Note that parse_config is called very early, before command line
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* parsing, before the verbose flag has been set, even before the
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* global handle 'g' is opened.
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*/
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void
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parse_config (void)
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{
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const char *home;
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FILE *fp;
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config_t conf;
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config_init (&conf);
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/* Try $HOME first. */
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home = getenv ("HOME");
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if (home != NULL) {
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CLEANUP_FREE char *path = NULL;
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if (asprintf (&path, "%s/%s", home, home_filename) == -1) {
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perror ("asprintf");
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exit (EXIT_FAILURE);
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}
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fp = fopen (path, "r");
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if (fp != NULL) {
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/*
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if (verbose)
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fprintf (stderr, "%s: reading configuration from %s\n",
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program_name, path);
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*/
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if (config_read (&conf, fp) == CONFIG_FALSE) {
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fprintf (stderr,
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_("%s: %s: line %d: error parsing configuration file: %s\n"),
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program_name, path, config_error_line (&conf),
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config_error_text (&conf));
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exit (EXIT_FAILURE);
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}
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if (fclose (fp) == -1) {
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perror (path);
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exit (EXIT_FAILURE);
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}
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/* Notes:
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*
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* (1) It's not obvious from the documentation, that config_read
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* completely resets the 'conf' structure. This means we cannot
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* call config_read twice on the two possible configuration
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* files, but instead have to copy out settings into our
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* variables between calls.
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*
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* (2) If the next call fails then 'read_only' variable is not
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* updated. Failure could happen just because the setting is
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* missing from the configuration file, so we ignore it here.
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*/
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config_lookup_bool (&conf, "read_only", &read_only);
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}
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}
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fp = fopen (etc_filename, "r");
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if (fp != NULL) {
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/*
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if (verbose)
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fprintf (stderr, "%s: reading configuration from %s\n",
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program_name, etc_filename);
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*/
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if (config_read (&conf, fp) == CONFIG_FALSE) {
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fprintf (stderr,
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_("%s: %s: line %d: error parsing configuration file: %s\n"),
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program_name, etc_filename, config_error_line (&conf),
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config_error_text (&conf));
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exit (EXIT_FAILURE);
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}
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if (fclose (fp) == -1) {
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perror (etc_filename);
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exit (EXIT_FAILURE);
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}
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config_lookup_bool (&conf, "read_only", &read_only);
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}
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config_destroy (&conf);
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}
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#else /* !HAVE_LIBCONFIG */
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void
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parse_config (void)
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{
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/*
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if (verbose)
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fprintf (stderr,
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_("%s: compiled without libconfig, guestfish configuration file ignored\n"),
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program_name);
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*/
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}
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#endif /* !HAVE_LIBCONFIG */
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