diff options
Diffstat (limited to 'fish/config.c')
| -rw-r--r-- | fish/config.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/fish/config.c b/fish/config.c new file mode 100644 index 00000000..c92bc4e2 --- /dev/null +++ b/fish/config.c @@ -0,0 +1,142 @@ +/* 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 */ |