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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2006,2007,2008,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
*
* GRUB 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.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <config-util.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/exec.h>
#include <grub/emu/config.h>
#include <grub/util/install.h>
#include <grub/util/misc.h>
#include <grub/list.h>
#include <grub/safemath.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <stdlib.h>
const char *
grub_util_get_config_filename (void)
{
static char *value = NULL;
if (!value)
value = grub_util_path_concat (3, GRUB_SYSCONFDIR,
"default", "grub");
return value;
}
const char *
grub_util_get_pkgdatadir (void)
{
const char *ret = getenv ("pkgdatadir");
if (ret)
return ret;
return GRUB_DATADIR "/" PACKAGE;
}
const char *
grub_util_get_pkglibdir (void)
{
return GRUB_LIBDIR "/" PACKAGE;
}
const char *
grub_util_get_localedir (void)
{
return LOCALEDIR;
}
struct cfglist
{
struct cfglist *next;
struct cfglist *prev;
char *path;
};
void
grub_util_load_config (struct grub_util_config *cfg)
{
pid_t pid;
const char *argv[4];
char *script = NULL, *ptr;
const char *cfgfile, *iptr;
char *cfgdir;
grub_util_fd_dir_t d;
struct cfglist *cfgpaths = NULL, *cfgpath, *next_cfgpath;
int num_cfgpaths = 0;
size_t len_cfgpaths = 0;
char **sorted_cfgpaths = NULL;
int i;
FILE *f = NULL;
int fd;
const char *v;
memset (cfg, 0, sizeof (*cfg));
v = getenv ("GRUB_ENABLE_CRYPTODISK");
if (v && v[0] == 'y' && v[1] == '\0')
cfg->is_cryptodisk_enabled = 1;
v = getenv ("GRUB_DISTRIBUTOR");
if (v)
cfg->grub_distributor = xstrdup (v);
cfgfile = grub_util_get_config_filename ();
if (grub_util_is_regular (cfgfile))
{
size_t sz;
++num_cfgpaths;
sz = strlen (cfgfile);
if (grub_mul (sz, 4, &sz) ||
grub_add (sz, sizeof (". ''; ") - 1, &sz) ||
grub_add (len_cfgpaths, sz, &len_cfgpaths))
grub_util_error ("%s", _("overflow is detected"));
}
cfgdir = xasprintf ("%s.d", cfgfile);
d = grub_util_fd_opendir (cfgdir);
if (d)
{
grub_util_fd_dirent_t de;
while ((de = grub_util_fd_readdir (d)))
{
const char *ext = strrchr (de->d_name, '.');
size_t sz;
if (!ext || strcmp (ext, ".cfg") != 0)
continue;
cfgpath = xmalloc (sizeof (*cfgpath));
cfgpath->path = grub_util_path_concat (2, cfgdir, de->d_name);
grub_list_push (GRUB_AS_LIST_P (&cfgpaths), GRUB_AS_LIST (cfgpath));
++num_cfgpaths;
sz = strlen (cfgpath->path);
if (grub_mul (sz, 4, &sz) ||
grub_add (sz, sizeof (". ''; ") - 1, &sz) ||
grub_add (len_cfgpaths, sz, &len_cfgpaths))
grub_util_error ("%s", _("overflow is detected"));
}
grub_util_fd_closedir (d);
}
if (num_cfgpaths == 0)
goto out;
sorted_cfgpaths = xcalloc (num_cfgpaths, sizeof (*sorted_cfgpaths));
i = 0;
if (grub_util_is_regular (cfgfile))
sorted_cfgpaths[i++] = xstrdup (cfgfile);
FOR_LIST_ELEMENTS_SAFE (cfgpath, next_cfgpath, cfgpaths)
{
sorted_cfgpaths[i++] = cfgpath->path;
free (cfgpath);
}
assert (i == num_cfgpaths);
qsort (sorted_cfgpaths + 1, num_cfgpaths - 1, sizeof (*sorted_cfgpaths),
(int (*) (const void *, const void *)) strcmp);
argv[0] = "sh";
argv[1] = "-c";
if (grub_add (len_cfgpaths, 300, &len_cfgpaths))
grub_util_error ("%s", _("overflow is detected"));
script = xmalloc (len_cfgpaths);
ptr = script;
for (i = 0; i < num_cfgpaths; i++)
{
memcpy (ptr, ". '", 3);
ptr += 3;
for (iptr = sorted_cfgpaths[i]; *iptr; iptr++)
{
if (*iptr == '\\')
{
memcpy (ptr, "'\\''", 4);
ptr += 4;
continue;
}
*ptr++ = *iptr;
}
memcpy (ptr, "'; ", 3);
ptr += 3;
}
strcpy (ptr, "printf \"GRUB_ENABLE_CRYPTODISK=%s\\nGRUB_DISTRIBUTOR=%s\\n\" "
"\"$GRUB_ENABLE_CRYPTODISK\" \"$GRUB_DISTRIBUTOR\"");
argv[2] = script;
argv[3] = '\0';
pid = grub_util_exec_pipe (argv, &fd);
if (pid)
f = fdopen (fd, "r");
if (f)
{
grub_util_parse_config (f, cfg, 1);
fclose (f);
}
if (pid)
{
close (fd);
waitpid (pid, NULL, 0);
}
if (f)
goto out;
for (i = 0; i < num_cfgpaths; i++)
{
f = grub_util_fopen (sorted_cfgpaths[i], "r");
if (f)
{
grub_util_parse_config (f, cfg, 0);
fclose (f);
}
else
grub_util_warn (_("cannot open configuration file `%s': %s"),
cfgfile, strerror (errno));
}
out:
free (script);
for (i = 0; i < num_cfgpaths; i++)
free (sorted_cfgpaths[i]);
free (sorted_cfgpaths);
free (cfgdir);
}
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