149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/* autofs.c - support auto-loading from fs.lst */
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/*
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* VAS_EBOOT -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* VAS_EBOOT 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 3 of the License, or
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* (at your option) any later version.
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*
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* VAS_EBOOT 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
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* along with VAS_EBOOT. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <VasEBoot/mm.h>
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#include <VasEBoot/dl.h>
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#include <VasEBoot/env.h>
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#include <VasEBoot/misc.h>
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#include <VasEBoot/fs.h>
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#include <VasEBoot/normal.h>
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/* This is used to store the names of filesystem modules for auto-loading. */
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static VasEBoot_named_list_t fs_module_list;
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/* The auto-loading hook for filesystems. */
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static int
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autoload_fs_module (void)
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{
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VasEBoot_named_list_t p;
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int ret = 0;
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while ((p = fs_module_list) != NULL)
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{
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if (! VasEBoot_dl_get (p->name) && VasEBoot_dl_load (p->name))
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{
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ret = 1;
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break;
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}
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if (VasEBoot_errno)
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VasEBoot_print_error ();
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fs_module_list = p->next;
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VasEBoot_free (p->name);
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VasEBoot_free (p);
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}
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return ret;
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}
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/* Read the file fs.lst for auto-loading. */
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void
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read_fs_list (const char *prefix)
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{
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if (prefix)
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{
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char *filename;
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filename = VasEBoot_xasprintf ("%s/" VAS_EBOOT_TARGET_CPU "-" VAS_EBOOT_PLATFORM
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"/fs.lst", prefix);
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if (filename)
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{
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VasEBoot_file_t file;
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VasEBoot_fs_autoload_hook_t tmp_autoload_hook;
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/* This rules out the possibility that read_fs_list() is invoked
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recursively when we call VasEBoot_file_open() below. */
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tmp_autoload_hook = VasEBoot_fs_autoload_hook;
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VasEBoot_fs_autoload_hook = NULL;
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file = VasEBoot_file_open (filename, VAS_EBOOT_FILE_TYPE_VAS_EBOOT_MODULE_LIST);
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if (file)
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{
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/* Override previous fs.lst. */
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while (fs_module_list)
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{
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VasEBoot_named_list_t tmp;
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tmp = fs_module_list->next;
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VasEBoot_free (fs_module_list);
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fs_module_list = tmp;
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}
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while (1)
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{
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char *buf;
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char *p;
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char *q;
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VasEBoot_named_list_t fs_mod;
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buf = VasEBoot_file_getline (file);
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if (! buf)
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break;
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p = buf;
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q = buf + VasEBoot_strlen (buf) - 1;
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/* Ignore space. */
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while (VasEBoot_isspace (*p))
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p++;
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while (p < q && VasEBoot_isspace (*q))
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*q-- = '\0';
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/* If the line is empty, skip it. */
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if (p >= q)
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{
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VasEBoot_free (buf);
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continue;
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}
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fs_mod = VasEBoot_malloc (sizeof (*fs_mod));
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if (! fs_mod)
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{
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VasEBoot_free (buf);
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continue;
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}
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fs_mod->name = VasEBoot_strdup (p);
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VasEBoot_free (buf);
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if (! fs_mod->name)
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{
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VasEBoot_free (fs_mod);
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continue;
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}
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fs_mod->next = fs_module_list;
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fs_module_list = fs_mod;
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}
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VasEBoot_file_close (file);
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VasEBoot_fs_autoload_hook = tmp_autoload_hook;
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}
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VasEBoot_free (filename);
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}
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}
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/* Ignore errors. */
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VasEBoot_errno = VAS_EBOOT_ERR_NONE;
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/* Set the hook. */
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VasEBoot_fs_autoload_hook = autoload_fs_module;
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}
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