Implement syslinux parser.
This commit is contained in:
Vladimir Serbinenko
parent
8ff35d0a1b
commit
8f5add13ff
10 changed files with 2116 additions and 58 deletions
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@ -1761,6 +1761,7 @@ module = {
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common = normal/term.c;
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common = normal/context.c;
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common = normal/charset.c;
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common = lib/getline.c;
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common = script/main.c;
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common = script/script.c;
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@ -2142,6 +2143,12 @@ module = {
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enable = xen;
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};
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module = {
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name = syslinuxcfg;
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common = lib/syslinux_parse.c;
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common = commands/syslinuxcfg.c;
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};
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module = {
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name = test_blockarg;
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common = tests/test_blockarg.c;
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214
grub-core/commands/syslinuxcfg.c
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214
grub-core/commands/syslinuxcfg.c
Normal file
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@ -0,0 +1,214 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB 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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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/extcmd.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/file.h>
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#include <grub/normal.h>
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#include <grub/script_sh.h>
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#include <grub/i18n.h>
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#include <grub/term.h>
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#include <grub/syslinux_parse.h>
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#include <grub/crypto.h>
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#include <grub/auth.h>
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#include <grub/disk.h>
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#include <grub/partition.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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/* Helper for syslinux_file. */
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static grub_err_t
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syslinux_file_getline (char **line, int cont __attribute__ ((unused)),
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void *data __attribute__ ((unused)))
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{
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*line = 0;
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return GRUB_ERR_NONE;
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}
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static const struct grub_arg_option options[] =
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{
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{"root", 'r', 0,
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N_("root directory of the syslinux disk (default /)."),
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N_("DIR"), ARG_TYPE_STRING},
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{"cwd", 'c', 0,
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N_("home directory of the syslinux config (default directory of configfile)."),
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N_("DIR"), ARG_TYPE_STRING},
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{"isolinux", 'i', 0, N_("assume isolinux."), 0, 0},
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{"pxelinux", 'p', 0, N_("assume pxelinux."), 0, 0},
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{"syslinux", 's', 0, N_("assume syslinux."), 0, 0},
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{0, 0, 0, 0, 0, 0}
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};
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enum
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{
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OPTION_ROOT,
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OPTION_CWD,
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OPTION_ISOLINUX,
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OPTION_PXELINUX,
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OPTION_SYSLINUX
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};
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static grub_err_t
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syslinux_file (grub_extcmd_context_t ctxt, const char *filename)
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{
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char *result;
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const char *root = ctxt->state[OPTION_ROOT].set ? ctxt->state[OPTION_ROOT].arg : "/";
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const char *cwd = ctxt->state[OPTION_CWD].set ? ctxt->state[OPTION_CWD].arg : NULL;
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grub_syslinux_flavour_t flav = GRUB_SYSLINUX_UNKNOWN;
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char *cwdf = NULL;
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grub_menu_t menu;
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if (ctxt->state[OPTION_ISOLINUX].set)
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flav = GRUB_SYSLINUX_ISOLINUX;
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if (ctxt->state[OPTION_PXELINUX].set)
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flav = GRUB_SYSLINUX_PXELINUX;
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if (ctxt->state[OPTION_SYSLINUX].set)
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flav = GRUB_SYSLINUX_SYSLINUX;
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if (!cwd)
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{
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char *p;
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cwdf = grub_strdup (filename);
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if (!cwdf)
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return grub_errno;
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p = grub_strrchr (cwdf, '/');
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if (!p)
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{
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grub_free (cwdf);
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cwd = "/";
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cwdf = NULL;
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}
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else
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{
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*p = '\0';
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cwd = cwdf;
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}
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}
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grub_dprintf ("syslinux",
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"transforming syslinux config %s, root = %s, cwd = %s\n",
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filename, root, cwd);
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result = grub_syslinux_config_file (root, root, cwd, cwd, filename, flav);
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if (!result)
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return grub_errno;
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grub_dprintf ("syslinux", "syslinux config transformed\n");
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menu = grub_env_get_menu ();
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if (! menu)
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{
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menu = grub_zalloc (sizeof (*menu));
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if (! menu)
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return grub_errno;
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grub_env_set_menu (menu);
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}
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grub_normal_parse_line (result, syslinux_file_getline, NULL);
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grub_print_error ();
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grub_free (result);
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grub_free (cwdf);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_cmd_syslinux_source (grub_extcmd_context_t ctxt,
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int argc, char **args)
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{
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int new_env, extractor;
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grub_err_t ret;
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if (argc != 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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extractor = (ctxt->extcmd->cmd->name[0] == 'e');
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new_env = (ctxt->extcmd->cmd->name[extractor ? (sizeof ("extract_syslinux_entries_") - 1)
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: (sizeof ("syslinux_") - 1)] == 'c');
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if (new_env)
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grub_cls ();
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if (new_env && !extractor)
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grub_env_context_open ();
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if (extractor)
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grub_env_extractor_open (!new_env);
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ret = syslinux_file (ctxt, args[0]);
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if (new_env)
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{
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grub_menu_t menu;
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menu = grub_env_get_menu ();
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if (menu && menu->size)
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grub_show_menu (menu, 1, 0);
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if (!extractor)
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grub_env_context_close ();
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}
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if (extractor)
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grub_env_extractor_close (!new_env);
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return ret;
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}
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static grub_extcmd_t cmd_source, cmd_configfile;
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static grub_extcmd_t cmd_source_extract, cmd_configfile_extract;
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GRUB_MOD_INIT(syslinuxcfg)
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{
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cmd_source
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= grub_register_extcmd ("syslinux_source",
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grub_cmd_syslinux_source, 0,
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N_("FILE"),
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/* TRANSLATORS: "syslinux config" means
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"config as used by syslinux". */
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N_("Parse syslinux config in same context"),
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options);
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cmd_configfile
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= grub_register_extcmd ("syslinux_configfile",
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grub_cmd_syslinux_source, 0,
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N_("FILE"),
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N_("Parse syslinux config in new context"),
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options);
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cmd_source_extract
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= grub_register_extcmd ("extract_syslinux_entries_source",
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grub_cmd_syslinux_source, 0,
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N_("FILE"),
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N_("Parse syslinux config in same context taking only menu entries"),
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options);
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cmd_configfile_extract
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= grub_register_extcmd ("extract_syslinux_entries_configfile",
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grub_cmd_syslinux_source, 0,
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N_("FILE"),
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N_("Parse syslinux config in new context taking only menu entries"),
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options);
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}
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GRUB_MOD_FINI(syslinuxcfg)
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{
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grub_unregister_extcmd (cmd_source);
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grub_unregister_extcmd (cmd_configfile);
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grub_unregister_extcmd (cmd_source_extract);
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grub_unregister_extcmd (cmd_configfile_extract);
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}
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92
grub-core/lib/getline.c
Normal file
92
grub-core/lib/getline.c
Normal file
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@ -0,0 +1,92 @@
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/* main.c - the normal mode main routine */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2000,2001,2002,2003,2005,2006,2007,2008,2009,2013 Free Software Foundation, Inc.
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*
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* GRUB 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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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/kernel.h>
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#include <grub/normal.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/file.h>
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#include <grub/mm.h>
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#include <grub/term.h>
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#include <grub/env.h>
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#include <grub/parser.h>
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#include <grub/reader.h>
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#include <grub/menu_viewer.h>
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#include <grub/auth.h>
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#include <grub/i18n.h>
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#include <grub/charset.h>
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#include <grub/script_sh.h>
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/* Read a line from the file FILE. */
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char *
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grub_file_getline (grub_file_t file)
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{
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char c;
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grub_size_t pos = 0;
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char *cmdline;
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int have_newline = 0;
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grub_size_t max_len = 64;
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/* Initially locate some space. */
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cmdline = grub_malloc (max_len);
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if (! cmdline)
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return 0;
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while (1)
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{
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if (grub_file_read (file, &c, 1) != 1)
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break;
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/* Skip all carriage returns. */
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if (c == '\r')
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continue;
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if (pos + 1 >= max_len)
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{
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char *old_cmdline = cmdline;
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max_len = max_len * 2;
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cmdline = grub_realloc (cmdline, max_len);
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if (! cmdline)
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{
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grub_free (old_cmdline);
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return 0;
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}
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}
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if (c == '\n')
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{
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have_newline = 1;
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break;
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}
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cmdline[pos++] = c;
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}
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cmdline[pos] = '\0';
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/* If the buffer is empty, don't return anything at all. */
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if (pos == 0 && !have_newline)
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{
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grub_free (cmdline);
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cmdline = 0;
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}
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return cmdline;
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}
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1501
grub-core/lib/syslinux_parse.c
Normal file
1501
grub-core/lib/syslinux_parse.c
Normal file
File diff suppressed because it is too large
Load diff
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@ -40,64 +40,6 @@ GRUB_MOD_LICENSE ("GPLv3+");
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static int nested_level = 0;
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int grub_normal_exit_level = 0;
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/* Read a line from the file FILE. */
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char *
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grub_file_getline (grub_file_t file)
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{
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char c;
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grub_size_t pos = 0;
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char *cmdline;
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int have_newline = 0;
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grub_size_t max_len = 64;
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/* Initially locate some space. */
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cmdline = grub_malloc (max_len);
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if (! cmdline)
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return 0;
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while (1)
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{
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if (grub_file_read (file, &c, 1) != 1)
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break;
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/* Skip all carriage returns. */
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if (c == '\r')
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continue;
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if (pos + 1 >= max_len)
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{
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char *old_cmdline = cmdline;
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max_len = max_len * 2;
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cmdline = grub_realloc (cmdline, max_len);
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if (! cmdline)
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{
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grub_free (old_cmdline);
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return 0;
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}
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}
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if (c == '\n')
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{
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have_newline = 1;
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break;
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}
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cmdline[pos++] = c;
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}
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cmdline[pos] = '\0';
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/* If the buffer is empty, don't return anything at all. */
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if (pos == 0 && !have_newline)
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{
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grub_free (cmdline);
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cmdline = 0;
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}
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return cmdline;
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}
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void
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grub_normal_free_menu (grub_menu_t menu)
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{
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