From 092fd48a25b748ff9969883815554f7980b34fe3 Mon Sep 17 00:00:00 2001 From: Vladimir 'phcoder' Serbinenko Date: Wed, 12 May 2010 15:19:01 +0200 Subject: [PATCH] legacy parser prototype --- commands/legacycfg.c | 521 +++++++++++++++++++++++++++++++++++++++++++ conf/i386-pc.rmk | 6 + 2 files changed, 527 insertions(+) create mode 100644 commands/legacycfg.c diff --git a/commands/legacycfg.c b/commands/legacycfg.c new file mode 100644 index 000000000..de4631140 --- /dev/null +++ b/commands/legacycfg.c @@ -0,0 +1,521 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2010 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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct legacy_command +{ + const char *name; + const char *map; + unsigned argc; + enum { + TYPE_VERBATIM, + TYPE_FORCE_OPTION, + TYPE_NOAPM_OPTION, + TYPE_FILE, + TYPE_PARTITION, + TYPE_BOOL, + TYPE_INT + } argt[3]; + enum { + FLAG_IGNORE_REST = 1, + FLAG_ALL_VERBATIM = 2 + } flags; +}; + +struct legacy_command legacy_commands[] = + { + {"blocklist", "blocklist '%s'\n", 1, {TYPE_FILE}, 0}, + {"boot", "boot\n", 0, {}, 0}, + /* bootp unsupported. */ + {"cat", "cat '%s'\n", 1, {TYPE_FILE}, 0}, + {"chainloader", "chainloader %s '%s'\n", 2, {TYPE_FORCE_OPTION, TYPE_FILE}, + 0}, + {"cmp", "cmp '%s' '%s'\n", 2, {TYPE_FILE, TYPE_FILE}, FLAG_IGNORE_REST}, + /* FIXME: Implement command. */ + {"color", "legacy_color '%s' '%s'\n", 2, {TYPE_VERBATIM, TYPE_VERBATIM}, + FLAG_IGNORE_REST}, + {"configfile", "legacy_configfile '%s'\n", 1, {TYPE_FILE}, 0}, + {"debug", + "if [ -z \"$debug\" ]; then set debug=all; else set debug=; fi\n", + 0, {}, 0}, + /* FIXME: Implement command. */ + {"default", "legacy_default %s\n", 1, {TYPE_INT}, 0}, + /* dhcp unsupported. */ + /* displayapm unsupported. */ + {"displaymem", "lsmem\n", 0, {}, 0}, + /* embed unsupported. */ + {"fallback", "set fallback='%s'\n", 1, {TYPE_VERBATIM}, 0}, + {"find", "search -f '%s'\n", 1, {TYPE_FILE}, 0}, + /* fstest unsupported. */ + /* geometry unsupported. */ + {"halt", "halt %s\n", 1, {TYPE_NOAPM_OPTION}, 0}, + /* help unsupported. */ /* NUL_TERMINATE */ + /* hiddenmenu unsupported. */ + {"hide", "parttool '%s' hidden+\n", 1, {TYPE_PARTITION}, 0}, + /* ifconfig unsupported. */ + /* impsprobe unsupported. */ + /* FIXME: Implement command. */ + {"initrd", "legacy_initrd '%s'\n", 1, {TYPE_FILE}, 0}, + /* install unsupported. */ + /* ioprobe unsupported. */ + /* FIXME: implement command. */ + {"kernel", "legacy_kernel %s\n", 0, {}, FLAG_ALL_VERBATIM}, + /* lock is handled separately. */ + {"makeactive", "parttool '%s' boot+\n", 1, {TYPE_PARTITION}, 0}, + {"map", "drivemap '%s' '%s'\n", 2, {TYPE_PARTITION, TYPE_PARTITION}, + FLAG_IGNORE_REST}, + /* md5crypt unsupported. */ + {"module", "legacy_initrd '%s'\n", 1, {TYPE_FILE}, 0}, + /* modulenounzip unsupported. */ + {"pager", "set pager=%d\n", 1, {TYPE_BOOL}, 0}, + /* partnew unsupported. */ + {"parttype", "parttool '%s' type=%s\n", 2, {TYPE_PARTITION, TYPE_INT}, 0}, + /* password unsupported. */ /* NUL_TERMINATE */ + /* pause unsupported. */ + /* rarp unsupported. */ + {"read", "read_dword %s\n", 1, {TYPE_INT}, 0}, + {"reboot", "reboot\n", 0, {}, 0}, + {"root", "set root='%s'\n", 1, {TYPE_PARTITION}, 0}, + {"rootnoverify", "set root='%s'\n", 1, {TYPE_PARTITION}, 0}, + {"savedefault", "saved_entry=${chosen}; save_env saved_entry\n", 0, {}, 0}, + /* serial unsupported. */ + /* setkey unsupported. */ /* NUL_TERMINATE */ + /* setup unsupported. */ + /* terminal unsupported. */ /* NUL_TERMINATE */ + /* terminfo unsupported. */ /* NUL_TERMINATE */ + /* testload unsupported. */ + /* testvbe unsupported. */ + /* tftpserver unsupported. */ + {"timeout", "set timeout=%s\n", 1, {TYPE_INT}, 0}, + /* title is handled separately. */ + {"unhide", "parttool '%s' hidden-\n", 1, {TYPE_PARTITION}, 0}, + /* uppermem unsupported. */ + /* vbeprobe unsupported. */ + }; + +static char * +escape (const char *in) +{ + const char *ptr; + char *ret, *outptr; + int overhead = 0; + for (ptr = in; *ptr; ptr++) + if (*ptr == '\'' || *ptr == '\\') + overhead++; + ret = grub_malloc (ptr - in + overhead); + if (!ret) + return NULL; + outptr = ret; + for (ptr = in; *ptr; ptr++) + { + if (*ptr == '\'' || *ptr == '\\') + *outptr++ = '\\'; + + *outptr++ = *ptr; + } + return ret; +} + +static char * +adjust_file (const char *in) +{ + const char *comma, *ptr, *rest; + char *ret, *outptr; + int overhead = 0; + int part; + if (in[0] != '(') + return escape (in); + for (ptr = in + 1; *ptr && *ptr != ')' && *ptr != ','; ptr++) + if (*ptr == '\'' || *ptr == '\\') + overhead++; + comma = ptr; + if (*comma != ',') + return escape (in); + part = grub_strtoull (comma + 1, (char **) &rest, 0); + for (ptr = rest; *ptr; ptr++) + if (*ptr == '\'' || *ptr == '\\') + overhead++; + + /* 30 is enough for any number. */ + ret = grub_malloc (ptr - in + overhead + 30); + if (!ret) + return NULL; + + outptr = ret; + for (ptr = in; ptr <= comma; ptr++) + { + if (*ptr == '\'' || *ptr == '\\') + *outptr++ = '\\'; + + *outptr++ = *ptr; + } + grub_snprintf (outptr, 30, "%d", part + 1); + while (*outptr) + outptr++; + for (ptr = rest; ptr <= comma; ptr++) + { + if (*ptr == '\'' || *ptr == '\\') + *outptr++ = '\\'; + + *outptr++ = *ptr; + } + return ret; +} + +static char * +legacy_parse (char *buf, char **entryname) +{ + char *ptr; + char *cmdname; + unsigned i, cmdnum; + + for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++); + if ((!*ptr || *ptr == '#') && entryname && *entryname) + return buf; + if (!*ptr || *ptr == '#') + { + grub_free (buf); + return NULL; + } + + cmdname = ptr; + for (ptr = buf; !grub_isspace (*ptr) && *ptr != '='; ptr++); + + if (entryname && grub_strncmp ("title", cmdname, ptr - cmdname) == 0 + && ptr - cmdname == sizeof ("title") - 1) + { + for (; grub_isspace (*ptr) || *ptr == '='; ptr++); + *entryname = grub_strdup (ptr); + grub_free (buf); + return NULL; + } + + if (grub_strncmp ("lock", cmdname, ptr - cmdname) == 0 + && ptr - cmdname == sizeof ("lock") - 1) + { + /* FIXME */ + } + + for (cmdnum = 0; cmdnum < ARRAY_SIZE (legacy_commands); cmdnum++) + if (grub_strncmp (legacy_commands[cmdnum].name, cmdname, ptr - cmdname) == 0 + && legacy_commands[cmdnum].name[ptr - cmdname] == 0) + break; + if (cmdnum == ARRAY_SIZE (legacy_commands)) + return grub_xasprintf ("# Unsupported legacy command: %s\n", buf); + + for (; grub_isspace (*ptr) || *ptr == '='; ptr++); + + char *args[ARRAY_SIZE (legacy_commands[0].argt)]; + memset (args, 0, sizeof (args)); + + if (legacy_commands[cmdnum].flags & FLAG_ALL_VERBATIM) + { + char *arg0 = ptr, *outptr; + int overhead = 3; + while (*ptr) + { + char *curarg; + for (; grub_isspace (*ptr); ptr++); + curarg = ptr; + for (; *ptr && !grub_isspace (*ptr); ptr++) + if (*ptr == '\\' || *ptr == '\'') + overhead++; + if (ptr) + ptr++; + overhead += 3; + } + args[0] = grub_malloc (overhead + (ptr - arg0)); + if (!args[0]) + { + grub_free (buf); + return NULL; + } + ptr = arg0; + outptr = args[0]; + while (*ptr) + { + char *curarg; + for (; grub_isspace (*ptr); ptr++); + curarg = ptr; + if (outptr != args[0]) + *outptr++ = ' '; + *outptr++ = '\''; + for (; *ptr && !grub_isspace (*ptr); ptr++) + { + if (*ptr == '\\' || *ptr == '\'') + *outptr++ = '\\'; + *outptr++ = *ptr; + } + *outptr++ = '\''; + if (ptr) + ptr++; + overhead += 3; + } + } + + { + unsigned j = 0; + for (i = 0; i < legacy_commands[cmdnum].argc; i++) + { + char *curarg, *cptr = NULL, c; + for (; grub_isspace (*ptr); ptr++); + curarg = ptr; + for (; !grub_isspace (*ptr); ptr++); + if (i != legacy_commands[cmdnum].argc - 1 + || (legacy_commands[cmdnum].flags & FLAG_IGNORE_REST)) + { + cptr = ptr; + c = *cptr; + *ptr = 0; + } + ptr++; + switch (legacy_commands[cmdnum].argt[i]) + { + case TYPE_PARTITION: + case TYPE_FILE: + args[j++] = adjust_file (curarg); + break; + + case TYPE_VERBATIM: + args[j++] = escape (curarg); + break; + case TYPE_FORCE_OPTION: + if (grub_strcmp (curarg, "--force") == 0) + { + args[j++] = grub_strdup ("--force"); + break; + } + if (cptr) + *cptr = c; + ptr = curarg; + break; + case TYPE_NOAPM_OPTION: + if (grub_strcmp (curarg, "--no-apm") == 0) + { + args[j++] = grub_strdup ("--no-apm"); + break; + } + if (cptr) + *cptr = c; + ptr = curarg; + break; + case TYPE_INT: + { + char *brk; + int base = 10; + brk = curarg; + if (brk[0] == '0' && brk[1] == 'x') + base = 16; + else if (brk[0] == '0') + base = 8; + for (; *brk; brk++) + { + if (base == 8 && (*brk == '8' || *brk == '9')) + break; + if (grub_isdigit (*brk)) + continue; + if (base != 16) + break; + if (!(*brk >= 'a' && *brk <= 'f') + && !(*brk >= 'A' && *brk <= 'F')) + break; + } + if (brk == curarg) + args[j++] = grub_strdup ("0"); + else + args[j++] = grub_strndup (curarg, brk - curarg); + } + break; + case TYPE_BOOL: + if (curarg[0] == 'o' && curarg[1] == 'n' + && (curarg[2] == 0 || grub_isspace (curarg[2]))) + args[j++] = grub_strdup ("1"); + else + args[j++] = grub_strdup ("0"); + break; + } + } + } + grub_free (buf); + return grub_xasprintf (legacy_commands[cmdnum].map, args[0], args[1], args[2]); +} + +static grub_err_t +legacy_file (const char *filename) +{ + grub_file_t file; + char *entryname = NULL, *entrysrc = NULL; + grub_menu_t menu; + + file = grub_gzfile_open (filename, 1); + if (! file) + return grub_errno; + + menu = grub_env_get_menu (); + if (! menu) + { + menu = grub_zalloc (sizeof (*menu)); + if (! menu) + return grub_errno; + + grub_env_set_menu (menu); + } + + while (1) + { + char *buf = grub_file_getline (file); + char *parsed; + + if (!buf && grub_errno) + { + grub_file_close (file); + return grub_errno; + } + + if (!buf) + break; + + { + char *oldname = NULL; + + oldname = entryname; + parsed = legacy_parse (buf, &entryname); + if (oldname != entryname && oldname) + { + const char **args = grub_malloc (sizeof (args[0])); + if (!args) + { + grub_file_close (file); + return grub_errno; + } + args[0] = oldname; + grub_normal_add_menu_entry (1, args, entrysrc); + } + } + + if (parsed && !entryname) + { + auto grub_err_t getline (char **line, int cont); + grub_err_t getline (char **line __attribute__ ((unused)), + int cont __attribute__ ((unused))) + { + return GRUB_ERR_NONE; + } + + grub_normal_parse_line (parsed, getline); + grub_free (parsed); + } + else if (parsed) + { + if (!entrysrc) + entrysrc = parsed; + else + { + char *t; + + t = entrysrc; + entrysrc = grub_realloc (entrysrc, grub_strlen (entrysrc) + + grub_strlen (parsed) + 1); + if (!entrysrc) + { + grub_free (t); + grub_free (parsed); + return grub_errno; + } + grub_memcpy (entrysrc + grub_strlen (entrysrc), buf, + grub_strlen (parsed) + 1); + grub_free (parsed); + parsed = NULL; + } + } + } + grub_file_close (file); + + if (entryname) + { + const char **args = grub_malloc (sizeof (args[0])); + if (!args) + { + grub_file_close (file); + return grub_errno; + } + args[0] = entryname; + grub_normal_add_menu_entry (1, args, entrysrc); + } + + if (menu && menu->size) + grub_show_menu (menu, 1); + + return GRUB_ERR_NONE; +} + +static grub_err_t +grub_cmd_legacy_source (struct grub_command *cmd __attribute__ ((unused)), + int argc, char **args) +{ + if (argc != 1) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required"); + return legacy_file (args[0]); +} + +static grub_err_t +grub_cmd_legacy_configfile (struct grub_command *cmd __attribute__ ((unused)), + int argc, char **args) +{ + grub_err_t ret; + if (argc != 1) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required"); + + grub_cls (); + grub_env_context_open (1); + + ret = legacy_file (args[0]); + grub_env_context_close (); + + return ret; +} + +static grub_command_t cmd_source, cmd_configfile; + +GRUB_MOD_INIT(legacycfg) +{ + cmd_source = grub_register_command ("legacy_source", + grub_cmd_legacy_source, + N_("FILE"), N_("Parse legacy config")); + cmd_configfile = grub_register_command ("legacy_configfile", + grub_cmd_legacy_configfile, + N_("FILE"), + N_("Parse legacy config")); +} + +GRUB_MOD_FINI(legacycfg) +{ + grub_unregister_command (cmd_source); + grub_unregister_command (cmd_configfile); +} diff --git a/conf/i386-pc.rmk b/conf/i386-pc.rmk index 5ff852f2e..791d64349 100644 --- a/conf/i386-pc.rmk +++ b/conf/i386-pc.rmk @@ -255,6 +255,12 @@ hdparm_mod_SOURCES = commands/hdparm.c lib/hexdump.c hdparm_mod_CFLAGS = $(COMMON_CFLAGS) hdparm_mod_LDFLAGS = $(COMMON_LDFLAGS) +# grub legacy ever supported only i386-pc. +pkglib_MODULES += legacycfg.mod +legacycfg_mod_SOURCES = commands/legacycfg.c +legacycfg_mod_CFLAGS = $(COMMON_CFLAGS) +legacycfg_mod_LDFLAGS = $(COMMON_LDFLAGS) + ifeq ($(enable_efiemu), yes) efiemu32.o: efiemu/runtime/efiemu.c $(TARGET_OBJ2ELF)