diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /grub-core/lib/syslinux_parse.c | |
parent | Initial commit. (diff) | |
download | grub2-upstream.tar.xz grub2-upstream.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'grub-core/lib/syslinux_parse.c')
-rw-r--r-- | grub-core/lib/syslinux_parse.c | 1555 |
1 files changed, 1555 insertions, 0 deletions
diff --git a/grub-core/lib/syslinux_parse.c b/grub-core/lib/syslinux_parse.c new file mode 100644 index 0000000..ff244d2 --- /dev/null +++ b/grub-core/lib/syslinux_parse.c @@ -0,0 +1,1555 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 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 <grub/mm.h> +#include <grub/file.h> +#include <grub/normal.h> +#include <grub/syslinux_parse.h> + +struct syslinux_say +{ + struct syslinux_say *next; + struct syslinux_say *prev; + char msg[0]; +}; + +struct initrd_list +{ + struct initrd_list *next; + char *file; +}; + +struct syslinux_menuentry +{ + struct syslinux_menuentry *next; + struct syslinux_menuentry *prev; + char *label; + char *extlabel; + char *kernel_file; + struct initrd_list *initrds; + struct initrd_list *initrds_last; + char *append; + char *argument; + char *help; + char *comments; + grub_size_t commentslen; + char hotkey; + int make_default; + struct syslinux_say *say; + + enum { KERNEL_NO_KERNEL, KERNEL_LINUX, KERNEL_CHAINLOADER, + KERNEL_BIN, KERNEL_PXE, KERNEL_CHAINLOADER_BPB, + KERNEL_COM32, KERNEL_COM, KERNEL_IMG, KERNEL_CONFIG, LOCALBOOT } + entry_type; +}; + +struct syslinux_menu +{ + struct syslinux_menu *parent; + struct syslinux_menuentry *entries; + char *def; + char *comments; + char *background; + const char *root_read_directory; + const char *root_target_directory; + const char *current_read_directory; + const char *current_target_directory; + const char *filename; + grub_size_t commentslen; + unsigned long timeout; + struct syslinux_say *say; + grub_syslinux_flavour_t flavour; +}; + +struct output_buffer +{ + grub_size_t alloc; + grub_size_t ptr; + char *buf; +}; + +static grub_err_t +syslinux_parse_real (struct syslinux_menu *menu); +static grub_err_t +config_file (struct output_buffer *outbuf, + const char *root, const char *target_root, + const char *cwd, const char *target_cwd, + const char *fname, struct syslinux_menu *parent, + grub_syslinux_flavour_t flav); +static grub_err_t +print_entry (struct output_buffer *outbuf, + struct syslinux_menu *menu, + const char *str); + +static grub_err_t +ensure_space (struct output_buffer *outbuf, grub_size_t len) +{ + grub_size_t newlen; + char *newbuf; + if (len < outbuf->alloc - outbuf->ptr) + return GRUB_ERR_NONE; + newlen = (outbuf->ptr + len + 10) * 2; + newbuf = grub_realloc (outbuf->buf, newlen); + if (!newbuf) + return grub_errno; + outbuf->alloc = newlen; + outbuf->buf = newbuf; + return GRUB_ERR_NONE; +} + +static grub_err_t +print (struct output_buffer *outbuf, const char *str, grub_size_t len) +{ + grub_err_t err; + err = ensure_space (outbuf, len); + if (err) + return err; + grub_memcpy (&outbuf->buf[outbuf->ptr], str, len); + outbuf->ptr += len; + return GRUB_ERR_NONE; +} + +static grub_err_t +add_comment (struct syslinux_menu *menu, const char *comment, int nl) +{ + if (menu->entries) + { + if (menu->entries->commentslen == 0 && *comment == 0) + return GRUB_ERR_NONE; + menu->entries->comments = grub_realloc (menu->entries->comments, + menu->entries->commentslen + + 2 + grub_strlen (comment)); + if (!menu->entries->comments) + return grub_errno; + menu->entries->commentslen + += grub_stpcpy (menu->entries->comments + menu->entries->commentslen, + comment) + - (menu->entries->comments + menu->entries->commentslen); + if (nl) + menu->entries->comments[menu->entries->commentslen++] = '\n'; + menu->entries->comments[menu->entries->commentslen] = '\0'; + } + else + { + if (menu->commentslen == 0 && *comment == 0) + return GRUB_ERR_NONE; + menu->comments = grub_realloc (menu->comments, menu->commentslen + + 2 + grub_strlen (comment)); + if (!menu->comments) + return grub_errno; + menu->commentslen += grub_stpcpy (menu->comments + menu->commentslen, + comment) + - (menu->comments + menu->commentslen); + if (nl) + menu->comments[menu->commentslen++] = '\n'; + menu->comments[menu->commentslen] = '\0'; + } + return GRUB_ERR_NONE; +} + + +#define print_string(x) do { err = print (outbuf, x, sizeof (x) - 1); if (err) return err; } while (0) + +static grub_err_t +print_num (struct output_buffer *outbuf, int n) +{ + char buf[20]; + grub_snprintf (buf, sizeof (buf), "%d", n); + return print (outbuf, buf, grub_strlen (buf)); +} + +static grub_err_t +label (const char *line, struct syslinux_menu *menu) +{ + struct syslinux_menuentry *entry; + + entry = grub_malloc (sizeof (*entry)); + if (!entry) + return grub_errno; + grub_memset (entry, 0, sizeof (*entry)); + entry->label = grub_strdup (line); + if (!entry->label) + { + grub_free (entry); + return grub_errno; + } + entry->next = menu->entries; + entry->prev = NULL; + if (menu->entries) + menu->entries->prev = entry; + menu->entries = entry; + return GRUB_ERR_NONE; +} + +static grub_err_t +kernel (const char *line, struct syslinux_menu *menu) +{ + const char *end = line + grub_strlen (line); + + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + + menu->entries->entry_type = KERNEL_LINUX; + + if (end - line >= 2 && grub_strcmp (end - 2, ".0") == 0) + menu->entries->entry_type = KERNEL_PXE; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".bin") == 0) + menu->entries->entry_type = KERNEL_BIN; + + if (end - line >= 3 && grub_strcasecmp (end - 3, ".bs") == 0) + menu->entries->entry_type = KERNEL_CHAINLOADER; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".bss") == 0) + menu->entries->entry_type = KERNEL_CHAINLOADER_BPB; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".c32") == 0) + menu->entries->entry_type = KERNEL_COM32; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".cbt") == 0) + menu->entries->entry_type = KERNEL_COM; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".com") == 0) + menu->entries->entry_type = KERNEL_COM; + + if (end - line >= 4 && grub_strcasecmp (end - 4, ".img") == 0) + menu->entries->entry_type = KERNEL_IMG; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_linux (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_LINUX; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_boot (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_CHAINLOADER; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_bss (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_CHAINLOADER_BPB; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_pxe (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_PXE; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_fdimage (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_IMG; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_comboot (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_COM; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_com32 (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = KERNEL_COM32; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_config (const char *line, struct syslinux_menu *menu) +{ + const char *space; + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + for (space = line; *space && !grub_isspace (*space); space++); + menu->entries->kernel_file = grub_strndup (line, space - line); + if (!menu->entries->kernel_file) + return grub_errno; + for (; *space && grub_isspace (*space); space++); + if (*space) + { + menu->entries->argument = grub_strdup (space); + if (!menu->entries->argument) + return grub_errno; + } + menu->entries->entry_type = KERNEL_CONFIG; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_append (const char *line, struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->append = grub_strdup (line); + if (!menu->entries->append) + return grub_errno; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_initrd (const char *line, struct syslinux_menu *menu) +{ + struct initrd_list *ninitrd; + const char *comma; + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + while (*line) + { + for (comma = line; *comma && *comma != ','; comma++); + + ninitrd = grub_malloc (sizeof (*ninitrd)); + if (!ninitrd) + return grub_errno; + ninitrd->file = grub_strndup (line, comma - line); + if (!ninitrd->file) + { + grub_free (ninitrd); + return grub_errno; + } + ninitrd->next = NULL; + if (menu->entries->initrds_last) + menu->entries->initrds_last->next = ninitrd; + else + { + menu->entries->initrds_last = ninitrd; + menu->entries->initrds = ninitrd; + } + + line = comma; + while (*line == ',') + line++; + } + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_default (const char *line, struct syslinux_menu *menu) +{ + menu->def = grub_strdup (line); + if (!menu->def) + return grub_errno; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_timeout (const char *line, struct syslinux_menu *menu) +{ + menu->timeout = grub_strtoul (line, NULL, 0); + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_menudefault (const char *line __attribute__ ((unused)), + struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->make_default = 1; + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_menubackground (const char *line, + struct syslinux_menu *menu) +{ + menu->background = grub_strdup (line); + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_localboot (const char *line, + struct syslinux_menu *menu) +{ + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->kernel_file = grub_strdup (line); + if (!menu->entries->kernel_file) + return grub_errno; + menu->entries->entry_type = LOCALBOOT; + + return GRUB_ERR_NONE; +} + +static grub_err_t +cmd_extlabel (const char *line, struct syslinux_menu *menu) +{ + const char *in; + char *out; + + if (!menu->entries) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "kernel without label"); + + menu->entries->extlabel = grub_malloc (grub_strlen (line) + 1); + if (!menu->entries->extlabel) + return grub_errno; + in = line; + out = menu->entries->extlabel; + while (*in) + { + if (in[0] == '^' && in[1]) + { + menu->entries->hotkey = grub_tolower (in[1]); + in++; + } + *out++ = *in++; + } + *out = 0; + + return GRUB_ERR_NONE; +} + + +static grub_err_t +cmd_say (const char *line, struct syslinux_menu *menu) +{ + struct syslinux_say *nsay; + nsay = grub_malloc (sizeof (*nsay) + grub_strlen (line) + 1); + if (!nsay) + return grub_errno; + nsay->prev = NULL; + if (menu->entries) + { + nsay->next = menu->entries->say; + menu->entries->say = nsay; + } + else + { + nsay->next = menu->say; + menu->say = nsay; + } + + if (nsay->next) + nsay->next->prev = nsay; + + grub_memcpy (nsay->msg, line, grub_strlen (line) + 1); + return GRUB_ERR_NONE; +} + +static char * +get_read_filename (struct syslinux_menu *menu, + const char *filename) +{ + return grub_xasprintf ("%s/%s", + filename[0] == '/' ? menu->root_read_directory + : menu->current_read_directory, filename); +} + +static char * +get_target_filename (struct syslinux_menu *menu, + const char *filename) +{ + return grub_xasprintf ("%s/%s", + filename[0] == '/' ? menu->root_target_directory + : menu->current_target_directory, filename); +} + +static grub_err_t +syslinux_parse (const char *filename, + struct syslinux_menu *menu) +{ + const char *old_filename = menu->filename; + grub_err_t ret; + char *nf; + nf = get_read_filename (menu, filename); + if (!nf) + return grub_errno; + menu->filename = nf; + ret = syslinux_parse_real (menu); + if (ret == GRUB_ERR_FILE_NOT_FOUND + || ret == GRUB_ERR_BAD_FILENAME) + { + grub_errno = ret = GRUB_ERR_NONE; + add_comment (menu, "# File ", 0); + add_comment (menu, nf, 0); + add_comment (menu, " not found", 1); + } + grub_free (nf); + menu->filename = old_filename; + return ret; +} + +struct +{ + const char *name1; + const char *name2; + grub_err_t (*parse) (const char *line, struct syslinux_menu *menu); +} commands[] = { + /* FIXME: support tagname. */ + {"include", NULL, syslinux_parse}, + {"menu", "include", syslinux_parse}, + {"label", NULL, label}, + {"kernel", NULL, kernel}, + {"linux", NULL, cmd_linux}, + {"boot", NULL, cmd_boot}, + {"bss", NULL, cmd_bss}, + {"pxe", NULL, cmd_pxe}, + {"fdimage", NULL, cmd_fdimage}, + {"comboot", NULL, cmd_comboot}, + {"com32", NULL, cmd_com32}, + {"config", NULL, cmd_config}, + {"append", NULL, cmd_append}, + /* FIXME: ipappend not supported. */ + {"localboot", NULL, cmd_localboot}, + {"initrd", NULL, cmd_initrd}, + {"default", NULL, cmd_default}, + {"menu", "label", cmd_extlabel}, + /* FIXME: MENU LABEL not supported. */ + /* FIXME: MENU HIDDEN not supported. */ + /* FIXME: MENU SEPARATOR not supported. */ + /* FIXME: MENU INDENT not supported. */ + /* FIXME: MENU DISABLE not supported. */ + /* FIXME: MENU HIDE not supported. */ + {"menu", "default", cmd_menudefault}, + /* FIXME: MENU PASSWD not supported. */ + /* FIXME: MENU MASTER PASSWD not supported. */ + {"menu", "background", cmd_menubackground}, + /* FIXME: MENU BEGIN not supported. */ + /* FIXME: MENU GOTO not supported. */ + /* FIXME: MENU EXIT not supported. */ + /* FIXME: MENU QUIT not supported. */ + /* FIXME: MENU START not supported. */ + /* FIXME: MENU AUTOBOOT not supported. */ + /* FIXME: MENU TABMSG not supported. */ + /* FIXME: MENU NOTABMSG not supported. */ + /* FIXME: MENU PASSPROMPT not supported. */ + /* FIXME: MENU COLOR not supported. */ + /* FIXME: MENU MSGCOLOR not supported. */ + /* FIXME: MENU WIDTH not supported. */ + /* FIXME: MENU MARGIN not supported. */ + /* FIXME: MENU PASSWORDMARGIN not supported. */ + /* FIXME: MENU ROWS not supported. */ + /* FIXME: MENU TABMSGROW not supported. */ + /* FIXME: MENU CMDLINEROW not supported. */ + /* FIXME: MENU ENDROW not supported. */ + /* FIXME: MENU PASSWORDROW not supported. */ + /* FIXME: MENU TIMEOUTROW not supported. */ + /* FIXME: MENU HELPMSGROW not supported. */ + /* FIXME: MENU HELPMSGENDROW not supported. */ + /* FIXME: MENU HIDDENROW not supported. */ + /* FIXME: MENU HSHIFT not supported. */ + /* FIXME: MENU VSHIFT not supported. */ + {"timeout", NULL, cmd_timeout}, + /* FIXME: TOTALTIMEOUT not supported. */ + /* FIXME: ONTIMEOUT not supported. */ + /* FIXME: ONERROR not supported. */ + /* FIXME: SERIAL not supported. */ + /* FIXME: CONSOLE not supported. */ + /* FIXME: FONT not supported. */ + /* FIXME: KBDMAP not supported. */ + {"say", NULL, cmd_say}, + /* FIXME: DISPLAY not supported. */ + /* FIXME: F* not supported. */ + + /* Commands to control interface behaviour which aren't needed with GRUB. + If they are important in your environment please contact GRUB team. + */ + {"prompt", NULL, NULL}, + {"nocomplete", NULL, NULL}, + {"noescape", NULL, NULL}, + {"implicit", NULL, NULL}, + {"allowoptions", NULL, NULL} +}; + +static grub_err_t +helptext (const char *line, grub_file_t file, struct syslinux_menu *menu) +{ + char *help; + char *buf = NULL; + grub_size_t helplen, alloclen = 0; + + help = grub_strdup (line); + if (!help) + return grub_errno; + helplen = grub_strlen (line); + while ((grub_free (buf), buf = grub_file_getline (file))) + { + char *ptr; + grub_size_t needlen; + for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++); + if (grub_strncasecmp (ptr, "endtext", sizeof ("endtext") - 1) == 0) + { + ptr += sizeof ("endtext") - 1; + for (; *ptr && (grub_isspace (*ptr) || *ptr == '\n' || *ptr == '\r'); + ptr++); + if (!*ptr) + { + menu->entries->help = help; + grub_free (buf); + return GRUB_ERR_NONE; + } + } + needlen = helplen + 1 + grub_strlen (buf); + if (alloclen < needlen) + { + alloclen = 2 * needlen; + help = grub_realloc (help, alloclen); + if (!help) + { + grub_free (buf); + return grub_errno; + } + } + helplen += grub_stpcpy (help + helplen, buf) - (help + helplen); + } + + grub_free (buf); + grub_free (help); + return grub_errno; +} + + +static grub_err_t +syslinux_parse_real (struct syslinux_menu *menu) +{ + grub_file_t file; + char *buf = NULL; + grub_err_t err = GRUB_ERR_NONE; + + file = grub_file_open (menu->filename, GRUB_FILE_TYPE_CONFIG); + if (!file) + return grub_errno; + while ((grub_free (buf), buf = grub_file_getline (file))) + { + const char *ptr1, *ptr2, *ptr3, *ptr4, *ptr5; + char *end; + unsigned i; + end = buf + grub_strlen (buf); + while (end > buf && (end[-1] == '\n' || end[-1] == '\r')) + end--; + *end = 0; + for (ptr1 = buf; *ptr1 && grub_isspace (*ptr1); ptr1++); + if (*ptr1 == '#' || *ptr1 == 0) + { + err = add_comment (menu, ptr1, 1); + if (err) + goto fail; + continue; + } + for (ptr2 = ptr1; !grub_isspace (*ptr2) && *ptr2; ptr2++); + for (ptr3 = ptr2; grub_isspace (*ptr3) && *ptr3; ptr3++); + for (ptr4 = ptr3; !grub_isspace (*ptr4) && *ptr4; ptr4++); + for (ptr5 = ptr4; grub_isspace (*ptr5) && *ptr5; ptr5++); + for (i = 0; i < ARRAY_SIZE(commands); i++) + if (grub_strlen (commands[i].name1) == (grub_size_t) (ptr2 - ptr1) + && grub_strncasecmp (commands[i].name1, ptr1, ptr2 - ptr1) == 0 + && (commands[i].name2 == NULL + || (grub_strlen (commands[i].name2) + == (grub_size_t) (ptr4 - ptr3) + && grub_strncasecmp (commands[i].name2, ptr3, ptr4 - ptr3) + == 0))) + break; + if (i == ARRAY_SIZE(commands)) + { + if (sizeof ("text") - 1 == ptr2 - ptr1 + && grub_strncasecmp ("text", ptr1, ptr2 - ptr1) == 0 + && (sizeof ("help") - 1 == ptr4 - ptr3 + && grub_strncasecmp ("help", ptr3, ptr4 - ptr3) == 0)) + { + if (helptext (ptr5, file, menu)) + { + grub_free (buf); + return 1; + } + continue; + } + + add_comment (menu, " # UNSUPPORTED command '", 0); + add_comment (menu, ptr1, 0); + add_comment (menu, "'", 1); + + continue; + } + if (commands[i].parse) + { + err = commands[i].parse (commands[i].name2 + ? ptr5 : ptr3, menu); + if (err) + goto fail; + } + } + fail: + grub_file_close (file); + grub_free (buf); + return err; +} + +static grub_err_t +print_escaped (struct output_buffer *outbuf, + const char *from, const char *to) +{ + const char *ptr; + grub_err_t err; + if (!to) + to = from + grub_strlen (from); + err = ensure_space (outbuf, (to - from) * 4 + 2); + if (err) + return err; + outbuf->buf[outbuf->ptr++] = '\''; + for (ptr = from; *ptr && ptr < to; ptr++) + { + if (*ptr == '\'') + { + outbuf->buf[outbuf->ptr++] = '\''; + outbuf->buf[outbuf->ptr++] = '\\'; + outbuf->buf[outbuf->ptr++] = '\''; + outbuf->buf[outbuf->ptr++] = '\''; + } + else + outbuf->buf[outbuf->ptr++] = *ptr; + } + outbuf->buf[outbuf->ptr++] = '\''; + return GRUB_ERR_NONE; +} + +static grub_err_t +print_file (struct output_buffer *outbuf, + struct syslinux_menu *menu, const char *from, const char *to) +{ + grub_err_t err; + if (!to) + to = from + grub_strlen (from); + err = print_escaped (outbuf, from[0] == '/' + ? menu->root_target_directory + : menu->current_target_directory, NULL); + if (err) + return err; + + err = print (outbuf, "/", 1); + if (err) + return err; + return print_escaped (outbuf, from, to); +} + +/* + * Makefile.am mimics this when generating tests/syslinux/ubuntu10.04_grub.cfg, + * so changes here may need to be reflected there too. + */ +static void +simplify_filename (char *str) +{ + char *iptr, *optr = str; + for (iptr = str; *iptr; iptr++) + { + if (*iptr == '/' && optr != str && optr[-1] == '/') + continue; + if (iptr[0] == '/' && iptr[1] == '.' && iptr[2] == '/') + { + iptr += 2; + continue; + } + if (iptr[0] == '/' && iptr[1] == '.' && iptr[2] == '.' + && iptr[3] == '/') + { + iptr += 3; + while (optr >= str && *optr != '/') + optr--; + if (optr < str) + { + str[0] = '/'; + optr = str; + } + optr++; + continue; + } + *optr++ = *iptr; + } + *optr = '\0'; +} + +static grub_err_t +print_config (struct output_buffer *outbuf, + struct syslinux_menu *menu, + const char *filename, const char *basedir) +{ + struct syslinux_menu *menuptr; + grub_err_t err = GRUB_ERR_NONE; + char *new_cwd = NULL; + char *new_target_cwd = NULL; + char *newname = NULL; + int depth = 0; + + new_cwd = get_read_filename (menu, basedir); + if (!new_cwd) + { + err = grub_errno; + goto out; + } + new_target_cwd = get_target_filename (menu, basedir); + if (!new_target_cwd) + { + err = grub_errno; + goto out; + } + newname = get_read_filename (menu, filename); + if (!newname) + { + err = grub_errno; + goto out; + } + simplify_filename (newname); + + print_string ("#"); + print_file (outbuf, menu, filename, NULL); + print_string (" "); + err = print (outbuf, newname, grub_strlen (newname)); + if (err) + return err; + print_string (":\n"); + + for (menuptr = menu; menuptr; menuptr = menuptr->parent, depth++) + if (grub_strcmp (menuptr->filename, newname) == 0 + || depth > 20) + break; + if (menuptr) + { + print_string (" syslinux_configfile -r "); + print_file (outbuf, menu, "/", NULL); + print_string (" -c "); + print_file (outbuf, menu, basedir, NULL); + print_string (" "); + print_file (outbuf, menu, filename, NULL); + print_string ("\n"); + } + else + { + err = config_file (outbuf, menu->root_read_directory, + menu->root_target_directory, new_cwd, new_target_cwd, + newname, menu, menu->flavour); + if (err == GRUB_ERR_FILE_NOT_FOUND + || err == GRUB_ERR_BAD_FILENAME) + { + grub_errno = err = GRUB_ERR_NONE; + print_string ("# File "); + err = print (outbuf, newname, grub_strlen (newname)); + if (err) + goto out; + print_string (" not found\n"); + } + } + + out: + grub_free (newname); + grub_free (new_cwd); + grub_free (new_target_cwd); + return err; +} + +static grub_err_t +write_entry (struct output_buffer *outbuf, + struct syslinux_menu *menu, + struct syslinux_menuentry *curentry) +{ + grub_err_t err; + if (curentry->comments) + { + err = print (outbuf, curentry->comments, + grub_strlen (curentry->comments)); + if (err) + return err; + } + { + struct syslinux_say *say; + for (say = curentry->say; say && say->next; say = say->next); + for (; say && say->prev; say = say->prev) + { + print_string ("echo "); + if (print_escaped (outbuf, say->msg, NULL)) return grub_errno; + print_string ("\n"); + } + } + + /* FIXME: support help text. */ + switch (curentry->entry_type) + { + case KERNEL_LINUX: + { + const char *ptr; + const char *initrd = NULL, *initrde= NULL; + for (ptr = curentry->append; ptr && *ptr; ptr++) + if ((ptr == curentry->append || grub_isspace (ptr[-1])) + && grub_strncasecmp (ptr, "initrd=", sizeof ("initrd=") - 1) + == 0) + break; + if (ptr && *ptr) + { + initrd = ptr + sizeof ("initrd=") - 1; + for (initrde = initrd; *initrde && !grub_isspace (*initrde); initrde++); + } + print_string (" if test x$grub_platform = xpc; then " + "linux_suffix=16; else linux_suffix= ; fi\n"); + print_string (" linux$linux_suffix "); + print_file (outbuf, menu, curentry->kernel_file, NULL); + print_string (" "); + if (curentry->append) + { + err = print (outbuf, curentry->append, grub_strlen (curentry->append)); + if (err) + return err; + } + print_string ("\n"); + if (initrd || curentry->initrds) + { + struct initrd_list *lst; + print_string (" initrd$linux_suffix "); + if (initrd) + { + print_file (outbuf, menu, initrd, initrde); + print_string (" "); + } + for (lst = curentry->initrds; lst; lst = lst->next) + { + print_file (outbuf, menu, lst->file, NULL); + print_string (" "); + } + + print_string ("\n"); + } + } + break; + case KERNEL_CHAINLOADER: + print_string (" chainloader "); + print_file (outbuf, menu, curentry->kernel_file, NULL); + print_string ("\n"); + break; + case KERNEL_CHAINLOADER_BPB: + print_string (" chainloader --bpb "); + print_file (outbuf, menu, curentry->kernel_file, NULL); + print_string ("\n"); + break; + case LOCALBOOT: + /* FIXME: support -1. */ + /* FIXME: PXELINUX. */ + { + int n = grub_strtol (curentry->kernel_file, NULL, 0); + if (n >= 0 && n <= 0x02) + { + print_string (" root=fd"); + if (print_num (outbuf, n)) + return grub_errno; + print_string (";\n chainloader +1;\n"); + + break; + } + if (n >= 0x80 && n < 0x8a) + { + print_string (" root=hd"); + if (print_num (outbuf, n - 0x80)) + return grub_errno; + print_string (";\n chainloader +1;\n"); + break; + } + print_string (" # UNSUPPORTED localboot type "); + print_string ("\ntrue;\n"); + if (print_num (outbuf, n)) + return grub_errno; + print_string ("\n"); + break; + } + case KERNEL_COM32: + case KERNEL_COM: + { + char *basename = NULL; + + { + char *ptr; + for (ptr = curentry->kernel_file; *ptr; ptr++) + if (*ptr == '/' || *ptr == '\\') + basename = ptr; + } + if (!basename) + basename = curentry->kernel_file; + else + basename++; + if (grub_strcasecmp (basename, "chain.c32") == 0) + { + char *file = NULL; + int is_fd = -1, devn = 0; + int part = -1; + int swap = 0; + char *ptr; + for (ptr = curentry->append; *ptr; ) + { + while (grub_isspace (*ptr)) + ptr++; + /* FIXME: support mbr: and boot. */ + if (ptr[0] == 'h' && ptr[1] == 'd') + { + is_fd = 0; + devn = grub_strtoul (ptr + 2, (const char **)&ptr, 0); + continue; + } + if (grub_strncasecmp (ptr, "file=", 5) == 0) + { + file = ptr + 5; + for (ptr = file; *ptr && !grub_isspace (*ptr); ptr++); + if (*ptr) + { + *ptr = 0; + ptr++; + } + continue; + } + if (grub_strncasecmp (ptr, "swap", sizeof ("swap") - 1) == 0) + { + swap = 1; + ptr += sizeof ("swap") - 1; + continue; + } + + if (ptr[0] == 'f' && ptr[1] == 'd') + { + is_fd = 1; + devn = grub_strtoul (ptr + 2, (const char **)&ptr, 0); + continue; + } + if (grub_isdigit (ptr[0])) + { + part = grub_strtoul (ptr, (const char **)&ptr, 0); + continue; + } + /* FIXME: isolinux, ntldr, cmldr, *dos, seg, hide + FIXME: sethidden. */ + print_string (" # UNSUPPORTED option "); + if (print (outbuf, ptr, grub_strlen (ptr))) + return 0; + print_string ("\n"); + break; + } + if (is_fd == -1) + { + print_string (" # no drive specified\n"); + break; + } + if (!*ptr) + { + print_string (is_fd ? " root=fd": " root=hd"); + if (print_num (outbuf, devn)) + return grub_errno; + if (part != -1) + { + print_string (","); + if (print_num (outbuf, part + 1)) + return grub_errno; + } + print_string (";\n"); + if (file) + { + print_string (" chainloader "); + print_file (outbuf, menu, file, NULL); + print_string (";\n"); + } + else + print_string (" chainloader +1;\n"); + if (swap) + print_string (" drivemap -s hd0 \"root\";\n"); + } + break; + } + + if (grub_strcasecmp (basename, "mboot.c32") == 0) + { + char *ptr; + int first = 1; + int is_kernel = 1; + for (ptr = curentry->append; *ptr; ) + { + char *ptrr = ptr; + while (*ptr && !grub_isspace (*ptr)) + ptr++; + if (ptrr + 2 == ptr && ptrr[0] == '-' && ptrr[1] == '-') + { + print_string ("\n"); + first = 1; + continue; + } + if (first) + { + if (is_kernel) + print_string (" multiboot "); + else + print_string (" module "); + first = 0; + is_kernel = 0; + if (print_file (outbuf, menu, ptrr, ptr)) + return grub_errno; + continue; + } + if (print_escaped (outbuf, ptrr, ptr)) + return grub_errno; + } + break; + } + + if (grub_strcasecmp (basename, "ifcpu64.c32") == 0) + { + char *lm, *lme, *pae = 0, *paee = 0, *i386s = 0, *i386e = 0; + char *ptr; + ptr = curentry->append; + while (grub_isspace (*ptr)) + ptr++; + lm = ptr; + while (*ptr && !grub_isspace (*ptr)) + ptr++; + lme = ptr; + while (grub_isspace (*ptr)) + ptr++; + if (ptr[0] == '-' && ptr[1] == '-') + { + ptr += 2; + while (grub_isspace (*ptr)) + ptr++; + pae = ptr; + while (*ptr && !grub_isspace (*ptr)) + ptr++; + paee = ptr; + } + while (grub_isspace (*ptr)) + ptr++; + if (ptr[0] == '-' && ptr[1] == '-') + { + ptr += 2; + while (grub_isspace (*ptr)) + ptr++; + i386s = ptr; + while (*ptr && !grub_isspace (*ptr)) + ptr++; + i386e = ptr; + } + *lme = '\0'; + if (paee) + *paee = '\0'; + if (i386e) + *i386e = '\0'; + if (!i386s) + { + i386s = pae; + pae = 0; + } + print_string ("if cpuid --long-mode; then true;\n"); + if (print_entry (outbuf, menu, lm)) + return grub_errno; + if (pae) + { + print_string ("elif cpuid --pae; then true;\n"); + if (print_entry (outbuf, menu, pae)) + return grub_errno; + } + print_string ("else\n"); + if (print_entry (outbuf, menu, i386s)) + return grub_errno; + print_string ("fi\n"); + break; + } + + if (grub_strcasecmp (basename, "reboot.c32") == 0) + { + print_string (" reboot\n"); + break; + } + + if (grub_strcasecmp (basename, "poweroff.com") == 0) + { + print_string (" halt\n"); + break; + } + + if (grub_strcasecmp (basename, "whichsys.c32") == 0) + { + grub_syslinux_flavour_t flavour = GRUB_SYSLINUX_ISOLINUX; + const char *flav[] = + { + [GRUB_SYSLINUX_ISOLINUX] = "iso", + [GRUB_SYSLINUX_PXELINUX] = "pxe", + [GRUB_SYSLINUX_SYSLINUX] = "sys" + }; + char *ptr; + for (ptr = curentry->append; *ptr; ) + { + char *bptr, c; + while (grub_isspace (*ptr)) + ptr++; + if (grub_strncasecmp (ptr, "-iso-", 5) == 0) + { + ptr += sizeof ("-iso-") - 1; + flavour = GRUB_SYSLINUX_ISOLINUX; + continue; + } + if (grub_strncasecmp (ptr, "-pxe-", 5) == 0) + { + ptr += sizeof ("-pxe-") - 1; + flavour = GRUB_SYSLINUX_PXELINUX; + continue; + } + if (grub_strncasecmp (ptr, "-sys-", 5) == 0) + { + ptr += sizeof ("-sys-") - 1; + flavour = GRUB_SYSLINUX_SYSLINUX; + continue; + } + bptr = ptr; + while (*ptr && !grub_isspace (*ptr)) + ptr++; + c = *ptr; + *ptr = '\0'; + if (menu->flavour == GRUB_SYSLINUX_UNKNOWN + && flavour == GRUB_SYSLINUX_ISOLINUX) + { + print_string ("if [ x$syslinux_flavour = xiso -o x$syslinux_flavour = x ]; then true;\n"); + menu->flavour = GRUB_SYSLINUX_ISOLINUX; + print_entry (outbuf, menu, bptr); + menu->flavour = GRUB_SYSLINUX_UNKNOWN; + print_string ("fi\n"); + } + else if (menu->flavour == GRUB_SYSLINUX_UNKNOWN) + { + print_string ("if [ x$syslinux_flavour = x"); + err = print (outbuf, flav[flavour], grub_strlen (flav[flavour])); + if (err) + return err; + print_string (" ]; then true;\n"); + menu->flavour = flavour; + print_entry (outbuf, menu, bptr); + menu->flavour = GRUB_SYSLINUX_UNKNOWN; + print_string ("fi\n"); + } + if (menu->flavour != GRUB_SYSLINUX_UNKNOWN + && menu->flavour == flavour) + print_entry (outbuf, menu, bptr); + *ptr = c; + } + break; + } + + if (grub_strcasecmp (basename, "menu.c32") == 0 || + grub_strcasecmp (basename, "vesamenu.c32") == 0) + { + char *ptr; + char *end; + + ptr = curentry->append; + if (!ptr) + return grub_errno; + + while (*ptr) + { + end = ptr; + for (end = ptr; *end && !grub_isspace (*end); end++); + if (*end) + *end++ = '\0'; + + /* "~" is supposed to be current file, so let's skip it */ + if (grub_strcmp (ptr, "~") != 0) + { + err = print_config (outbuf, menu, ptr, ""); + if (err != GRUB_ERR_NONE) + break; + } + for (ptr = end; *ptr && grub_isspace (*ptr); ptr++); + } + err = GRUB_ERR_NONE; + break; + } + + /* FIXME: gdb, GFXBoot, Hdt, Ifcpu, Ifplop, Kbdmap, + FIXME: Linux, Lua, Meminfo, rosh, Sanbboot */ + + print_string (" # UNSUPPORTED com(32) "); + err = print (outbuf, basename, grub_strlen (basename)); + if (err) + return err; + print_string ("\ntrue;\n"); + break; + } + case KERNEL_CONFIG: + { + const char *ap; + ap = curentry->append; + if (!ap) + ap = curentry->argument; + if (!ap) + ap = ""; + print_config (outbuf, menu, curentry->kernel_file, ap); + } + break; + case KERNEL_NO_KERNEL: + /* FIXME: support this. */ + case KERNEL_BIN: + case KERNEL_PXE: + case KERNEL_IMG: + print_string (" # UNSUPPORTED entry type "); + if (print_num (outbuf, curentry->entry_type)) + return grub_errno; + print_string ("\ntrue;\n"); + break; + } + return GRUB_ERR_NONE; +} + +static grub_err_t +print_entry (struct output_buffer *outbuf, + struct syslinux_menu *menu, + const char *str) +{ + struct syslinux_menuentry *curentry; + for (curentry = menu->entries; curentry; curentry = curentry->next) + if (grub_strcasecmp (curentry->label, str) == 0) + { + grub_err_t err; + err = write_entry (outbuf, menu, curentry); + if (err) + return err; + } + return GRUB_ERR_NONE; +} + +static void +free_menu (struct syslinux_menu *menu) +{ + struct syslinux_say *say, *nsay; + struct syslinux_menuentry *entry, *nentry; + + grub_free (menu->def); + grub_free (menu->comments); + grub_free (menu->background); + for (say = menu->say; say ; say = nsay) + { + nsay = say->next; + grub_free (say); + } + + for (entry = menu->entries; entry ; entry = nentry) + { + nentry = entry->next; + struct initrd_list *initrd, *ninitrd; + + for (initrd = entry->initrds; initrd ; initrd = ninitrd) + { + ninitrd = initrd->next; + grub_free (initrd->file); + grub_free (initrd); + } + + grub_free (entry->comments); + grub_free (entry->kernel_file); + grub_free (entry->label); + grub_free (entry->extlabel); + grub_free (entry->append); + grub_free (entry->help); + grub_free (entry); + } +} + +static grub_err_t +config_file (struct output_buffer *outbuf, + const char *root, const char *target_root, + const char *cwd, const char *target_cwd, + const char *fname, struct syslinux_menu *parent, + grub_syslinux_flavour_t flav) +{ + grub_err_t err; + struct syslinux_menu menu; + struct syslinux_menuentry *curentry, *lentry; + struct syslinux_say *say; + + grub_memset (&menu, 0, sizeof (menu)); + menu.flavour = flav; + menu.root_read_directory = root; + menu.root_target_directory = target_root; + menu.current_read_directory = cwd; + menu.current_target_directory = target_cwd; + + menu.filename = fname; + menu.parent = parent; + err = syslinux_parse_real (&menu); + if (err) + return err; + + for (say = menu.say; say && say->next; say = say->next); + for (; say && say->prev; say = say->prev) + { + print_string ("echo "); + err = print_escaped (outbuf, say->msg, NULL); + if (err) + return err; + print_string ("\n"); + } + + if (menu.background) + { + print_string (" background_image "); + err = print_file (outbuf, &menu, menu.background, NULL); + if (err) + return err; + print_string ("\n"); + } + + if (menu.comments) + { + err = print (outbuf, menu.comments, grub_strlen (menu.comments)); + if (err) + return err; + } + + if (menu.timeout == 0 && menu.entries && menu.def) + { + err = print_entry (outbuf, &menu, menu.def); + if (err) + return err; + } + else if (menu.entries) + { + for (curentry = menu.entries; curentry->next; curentry = curentry->next); + lentry = curentry; + + print_string ("set timeout="); + err = print_num (outbuf, (menu.timeout + 9) / 10); + if (err) + return err; + print_string ("\n"); + + if (menu.def) + { + print_string (" default="); + err = print_escaped (outbuf, menu.def, NULL); + if (err) + return err; + print_string ("\n"); + } + for (curentry = lentry; curentry; curentry = curentry->prev) + { + print_string ("menuentry "); + err = print_escaped (outbuf, + curentry->extlabel ? : curentry->label, NULL); + if (err) + return err; + if (curentry->hotkey) + { + char hk[] = { curentry->hotkey, '\0' }; + print_string (" --hotkey '"); + print_string (hk); + print_string ("'"); + } + print_string (" --id "); + err = print_escaped (outbuf, curentry->label, NULL); + if (err) + return err; + print_string (" {\n"); + + err = write_entry (outbuf, &menu, curentry); + if (err) + return err; + + print_string ("}\n"); + } + } + free_menu (&menu); + return GRUB_ERR_NONE; +} + +char * +grub_syslinux_config_file (const char *base, const char *target_base, + const char *cwd, const char *target_cwd, + const char *fname, grub_syslinux_flavour_t flav) +{ + struct output_buffer outbuf = { 0, 0, 0 }; + grub_err_t err; + err = config_file (&outbuf, base, target_base, cwd, target_cwd, + fname, NULL, flav); + if (err) + return NULL; + err = print (&outbuf, "\0", 1); + if (err) + return NULL; + return outbuf.buf; +} |