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0027-blscfg-add-blscfg-module-to-parse-Boot-Loader-Specif.patch
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0027-blscfg-add-blscfg-module-to-parse-Boot-Loader-Specif.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <[email protected]>
Date: Tue, 22 Jan 2013 06:31:38 +0100
Subject: [PATCH] blscfg: add blscfg module to parse Boot Loader Specification
snippets
The BootLoaderSpec (BLS) defines a scheme where different bootloaders can
share a format for boot items and a configuration directory that accepts
these common configurations as drop-in files.
Signed-off-by: Peter Jones <[email protected]>
Signed-off-by: Javier Martinez Canillas <[email protected]>
[wjt: some cleanups and fixes]
Signed-off-by: Will Thompson <[email protected]>
---
grub-core/Makefile.core.def | 11 +
grub-core/commands/blscfg.c | 1096 ++++++++++++++++++++++++++++++++++++++++
grub-core/commands/legacycfg.c | 5 +-
grub-core/commands/loadenv.c | 77 +--
grub-core/commands/menuentry.c | 20 +-
grub-core/normal/main.c | 6 +
grub-core/commands/loadenv.h | 93 ++++
include/grub/compiler.h | 2 +
include/grub/menu.h | 13 +
include/grub/normal.h | 2 +-
10 files changed, 1243 insertions(+), 82 deletions(-)
create mode 100644 grub-core/commands/blscfg.c
create mode 100644 grub-core/commands/loadenv.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 41b5e16a3ce..57e253ab1a1 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -811,6 +811,16 @@ module = {
common = commands/blocklist.c;
};
+module = {
+ name = blscfg;
+ common = commands/blscfg.c;
+ common = commands/loadenv.h;
+ enable = powerpc_ieee1275;
+ enable = efi;
+ enable = i386_pc;
+ enable = emu;
+};
+
module = {
name = boot;
common = commands/boot.c;
@@ -988,6 +998,7 @@ module = {
module = {
name = loadenv;
common = commands/loadenv.c;
+ common = commands/loadenv.h;
common = lib/envblk.c;
};
diff --git a/grub-core/commands/blscfg.c b/grub-core/commands/blscfg.c
new file mode 100644
index 00000000000..54458b14518
--- /dev/null
+++ b/grub-core/commands/blscfg.c
@@ -0,0 +1,1096 @@
+/*-*- Mode: C; c-basic-offset: 2; indent-tabs-mode: t -*-*/
+
+/* bls.c - implementation of the boot loader spec */
+
+/*
+ * GRUB -- GRand Unified Bootloader
+ *
+ * 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/list.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/extcmd.h>
+#include <grub/i18n.h>
+#include <grub/fs.h>
+#include <grub/env.h>
+#include <grub/file.h>
+#include <grub/normal.h>
+#include <grub/lib/envblk.h>
+
+#include <stdbool.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#include "loadenv.h"
+
+#define GRUB_BLS_CONFIG_PATH "/loader/entries/"
+#ifdef GRUB_MACHINE_EMU
+#define GRUB_BOOT_DEVICE "/boot"
+#else
+#define GRUB_BOOT_DEVICE "($root)"
+#endif
+
+struct keyval
+{
+ const char *key;
+ char *val;
+};
+
+static struct bls_entry *entries = NULL;
+
+#define FOR_BLS_ENTRIES(var) FOR_LIST_ELEMENTS (var, entries)
+
+static int bls_add_keyval(struct bls_entry *entry, char *key, char *val)
+{
+ char *k, *v;
+ struct keyval **kvs, *kv;
+ int new_n = entry->nkeyvals + 1;
+
+ kvs = grub_realloc (entry->keyvals, new_n * sizeof (struct keyval *));
+ if (!kvs)
+ return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry");
+ entry->keyvals = kvs;
+
+ kv = grub_malloc (sizeof (struct keyval));
+ if (!kv)
+ return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry");
+
+ k = grub_strdup (key);
+ if (!k)
+ {
+ grub_free (kv);
+ return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry");
+ }
+
+ v = grub_strdup (val);
+ if (!v)
+ {
+ grub_free (k);
+ grub_free (kv);
+ return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry");
+ }
+
+ kv->key = k;
+ kv->val = v;
+
+ entry->keyvals[entry->nkeyvals] = kv;
+ grub_dprintf("blscfg", "new keyval at %p:%s:%s\n", entry->keyvals[entry->nkeyvals], k, v);
+ entry->nkeyvals = new_n;
+
+ return 0;
+}
+
+/* Find they value of the key named by keyname. If there are allowed to be
+ * more than one, pass a pointer to an int set to -1 the first time, and pass
+ * the same pointer through each time after, and it'll return them in sorted
+ * order as defined in the BLS fragment file */
+static char *bls_get_val(struct bls_entry *entry, const char *keyname, int *last)
+{
+ int idx, start = 0;
+ struct keyval *kv = NULL;
+
+ if (last)
+ start = *last + 1;
+
+ for (idx = start; idx < entry->nkeyvals; idx++) {
+ kv = entry->keyvals[idx];
+
+ if (!grub_strcmp (keyname, kv->key))
+ break;
+ }
+
+ if (idx == entry->nkeyvals) {
+ if (last)
+ *last = -1;
+ return NULL;
+ }
+
+ if (last)
+ *last = idx;
+
+ return kv->val;
+}
+
+#define goto_return(x) ({ ret = (x); goto finish; })
+
+/* compare alpha and numeric segments of two versions */
+/* return 1: a is newer than b */
+/* 0: a and b are the same version */
+/* -1: b is newer than a */
+static int vercmp(const char * a, const char * b)
+{
+ char oldch1, oldch2;
+ char *abuf, *bbuf;
+ char *str1, *str2;
+ char * one, * two;
+ int rc;
+ int isnum;
+ int ret = 0;
+
+ grub_dprintf("blscfg", "%s comparing %s and %s\n", __func__, a, b);
+ if (!grub_strcmp(a, b))
+ return 0;
+
+ abuf = grub_malloc(grub_strlen(a) + 1);
+ bbuf = grub_malloc(grub_strlen(b) + 1);
+ str1 = abuf;
+ str2 = bbuf;
+ grub_strcpy(str1, a);
+ grub_strcpy(str2, b);
+
+ one = str1;
+ two = str2;
+
+ /* loop through each version segment of str1 and str2 and compare them */
+ while (*one || *two) {
+ while (*one && !grub_isalnum(*one) && *one != '~') one++;
+ while (*two && !grub_isalnum(*two) && *two != '~') two++;
+
+ /* handle the tilde separator, it sorts before everything else */
+ if (*one == '~' || *two == '~') {
+ if (*one != '~') goto_return (1);
+ if (*two != '~') goto_return (-1);
+ one++;
+ two++;
+ continue;
+ }
+
+ /* If we ran to the end of either, we are finished with the loop */
+ if (!(*one && *two)) break;
+
+ str1 = one;
+ str2 = two;
+
+ /* grab first completely alpha or completely numeric segment */
+ /* leave one and two pointing to the start of the alpha or numeric */
+ /* segment and walk str1 and str2 to end of segment */
+ if (grub_isdigit(*str1)) {
+ while (*str1 && grub_isdigit(*str1)) str1++;
+ while (*str2 && grub_isdigit(*str2)) str2++;
+ isnum = 1;
+ } else {
+ while (*str1 && grub_isalpha(*str1)) str1++;
+ while (*str2 && grub_isalpha(*str2)) str2++;
+ isnum = 0;
+ }
+
+ /* save character at the end of the alpha or numeric segment */
+ /* so that they can be restored after the comparison */
+ oldch1 = *str1;
+ *str1 = '\0';
+ oldch2 = *str2;
+ *str2 = '\0';
+
+ /* this cannot happen, as we previously tested to make sure that */
+ /* the first string has a non-null segment */
+ if (one == str1) goto_return(-1); /* arbitrary */
+
+ /* take care of the case where the two version segments are */
+ /* different types: one numeric, the other alpha (i.e. empty) */
+ /* numeric segments are always newer than alpha segments */
+ /* XXX See patch #60884 (and details) from bugzilla #50977. */
+ if (two == str2) goto_return (isnum ? 1 : -1);
+
+ if (isnum) {
+ grub_size_t onelen, twolen;
+ /* this used to be done by converting the digit segments */
+ /* to ints using atoi() - it's changed because long */
+ /* digit segments can overflow an int - this should fix that. */
+
+ /* throw away any leading zeros - it's a number, right? */
+ while (*one == '0') one++;
+ while (*two == '0') two++;
+
+ /* whichever number has more digits wins */
+ onelen = grub_strlen(one);
+ twolen = grub_strlen(two);
+ if (onelen > twolen) goto_return (1);
+ if (twolen > onelen) goto_return (-1);
+ }
+
+ /* grub_strcmp will return which one is greater - even if the two */
+ /* segments are alpha or if they are numeric. don't return */
+ /* if they are equal because there might be more segments to */
+ /* compare */
+ rc = grub_strcmp(one, two);
+ if (rc) goto_return (rc < 1 ? -1 : 1);
+
+ /* restore character that was replaced by null above */
+ *str1 = oldch1;
+ one = str1;
+ *str2 = oldch2;
+ two = str2;
+ }
+
+ /* this catches the case where all numeric and alpha segments have */
+ /* compared identically but the segment sepparating characters were */
+ /* different */
+ if ((!*one) && (!*two)) goto_return (0);
+
+ /* whichever version still has characters left over wins */
+ if (!*one) goto_return (-1); else goto_return (1);
+
+finish:
+ grub_free (abuf);
+ grub_free (bbuf);
+ return ret;
+}
+
+/* returns name/version/release */
+/* NULL string pointer returned if nothing found */
+static void
+split_package_string (char *package_string, char **name,
+ char **version, char **release)
+{
+ char *package_version, *package_release;
+
+ /* Release */
+ package_release = grub_strrchr (package_string, '-');
+
+ if (package_release != NULL)
+ *package_release++ = '\0';
+
+ *release = package_release;
+
+ if (name == NULL)
+ {
+ *version = package_string;
+ }
+ else
+ {
+ /* Version */
+ package_version = grub_strrchr(package_string, '-');
+
+ if (package_version != NULL)
+ *package_version++ = '\0';
+
+ *version = package_version;
+ /* Name */
+ *name = package_string;
+ }
+
+ /* Bubble up non-null values from release to name */
+ if (name != NULL && *name == NULL)
+ {
+ *name = (*version == NULL ? *release : *version);
+ *version = *release;
+ *release = NULL;
+ }
+ if (*version == NULL)
+ {
+ *version = *release;
+ *release = NULL;
+ }
+}
+
+static int
+split_cmp(char *nvr0, char *nvr1, int has_name)
+{
+ int ret = 0;
+ char *name0, *version0, *release0;
+ char *name1, *version1, *release1;
+
+ split_package_string(nvr0, has_name ? &name0 : NULL, &version0, &release0);
+ split_package_string(nvr1, has_name ? &name1 : NULL, &version1, &release1);
+
+ if (has_name)
+ {
+ ret = vercmp(name0 == NULL ? "" : name0,
+ name1 == NULL ? "" : name1);
+ if (ret != 0)
+ return ret;
+ }
+
+ ret = vercmp(version0 == NULL ? "" : version0,
+ version1 == NULL ? "" : version1);
+ if (ret != 0)
+ return ret;
+
+ ret = vercmp(release0 == NULL ? "" : release0,
+ release1 == NULL ? "" : release1);
+ return ret;
+}
+
+/* return 1: e0 is newer than e1 */
+/* 0: e0 and e1 are the same version */
+/* -1: e1 is newer than e0 */
+static int bls_cmp(const struct bls_entry *e0, const struct bls_entry *e1)
+{
+ char *id0, *id1;
+ int r;
+
+ id0 = grub_strdup(e0->filename);
+ id1 = grub_strdup(e1->filename);
+
+ r = split_cmp(id0, id1, 1);
+
+ grub_free(id0);
+ grub_free(id1);
+
+ return r;
+}
+
+static void list_add_tail(struct bls_entry *head, struct bls_entry *item)
+{
+ item->next = head;
+ if (head->prev)
+ head->prev->next = item;
+ item->prev = head->prev;
+ head->prev = item;
+}
+
+static int bls_add_entry(struct bls_entry *entry)
+{
+ struct bls_entry *e, *last = NULL;
+ int rc;
+
+ if (!entries) {
+ grub_dprintf ("blscfg", "Add entry with id \"%s\"\n", entry->filename);
+ entries = entry;
+ return 0;
+ }
+
+ FOR_BLS_ENTRIES(e) {
+ rc = bls_cmp(entry, e);
+
+ if (!rc)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ if (rc == 1) {
+ grub_dprintf ("blscfg", "Add entry with id \"%s\"\n", entry->filename);
+ list_add_tail (e, entry);
+ if (e == entries) {
+ entries = entry;
+ entry->prev = NULL;
+ }
+ return 0;
+ }
+ last = e;
+ }
+
+ if (last) {
+ grub_dprintf ("blscfg", "Add entry with id \"%s\"\n", entry->filename);
+ last->next = entry;
+ entry->prev = last;
+ }
+
+ return 0;
+}
+
+struct read_entry_info {
+ const char *devid;
+ const char *dirname;
+ grub_file_t file;
+};
+
+static int read_entry (
+ const char *filename,
+ const struct grub_dirhook_info *dirhook_info UNUSED,
+ void *data)
+{
+ grub_size_t m = 0, n, clip = 0;
+ int rc = 0;
+ char *p = NULL;
+ grub_file_t f = NULL;
+ struct bls_entry *entry;
+ struct read_entry_info *info = (struct read_entry_info *)data;
+
+ grub_dprintf ("blscfg", "filename: \"%s\"\n", filename);
+
+ n = grub_strlen (filename);
+
+ if (info->file)
+ {
+ f = info->file;
+ }
+ else
+ {
+ if (filename[0] == '.')
+ return 0;
+
+ if (n <= 5)
+ return 0;
+
+ if (grub_strcmp (filename + n - 5, ".conf") != 0)
+ return 0;
+
+ p = grub_xasprintf ("(%s)%s/%s", info->devid, info->dirname, filename);
+
+ f = grub_file_open (p, GRUB_FILE_TYPE_CONFIG);
+ if (!f)
+ goto finish;
+ }
+
+ entry = grub_zalloc (sizeof (*entry));
+ if (!entry)
+ goto finish;
+
+ if (info->file)
+ {
+ char *slash;
+
+ if (n > 5 && !grub_strcmp (filename + n - 5, ".conf") == 0)
+ clip = 5;
+
+ slash = grub_strrchr (filename, '/');
+ if (!slash)
+ slash = grub_strrchr (filename, '\\');
+
+ while (*slash == '/' || *slash == '\\')
+ slash++;
+
+ m = slash ? slash - filename : 0;
+ }
+ else
+ {
+ m = 0;
+ clip = 5;
+ }
+ n -= m;
+
+ entry->filename = grub_strndup(filename + m, n - clip);
+ if (!entry->filename)
+ goto finish;
+
+ entry->filename[n - 5] = '\0';
+
+ for (;;)
+ {
+ char *buf;
+ char *separator;
+
+ buf = grub_file_getline (f);
+ if (!buf)
+ break;
+
+ while (buf && buf[0] && (buf[0] == ' ' || buf[0] == '\t'))
+ buf++;
+ if (buf[0] == '#')
+ continue;
+
+ separator = grub_strchr (buf, ' ');
+
+ if (!separator)
+ separator = grub_strchr (buf, '\t');
+
+ if (!separator || separator[1] == '\0')
+ {
+ grub_free (buf);
+ break;
+ }
+
+ separator[0] = '\0';
+
+ do {
+ separator++;
+ } while (*separator == ' ' || *separator == '\t');
+
+ rc = bls_add_keyval (entry, buf, separator);
+ grub_free (buf);
+ if (rc < 0)
+ break;
+ }
+
+ if (!rc)
+ bls_add_entry(entry);
+
+finish:
+ if (p)
+ grub_free (p);
+
+ if (f)
+ grub_file_close (f);
+
+ return 0;
+}
+
+static grub_envblk_t saved_env = NULL;
+
+static int UNUSED
+save_var (const char *name, const char *value, void *whitelist UNUSED)
+{
+ const char *val = grub_env_get (name);
+ grub_dprintf("blscfg", "saving \"%s\"\n", name);
+
+ if (val)
+ grub_envblk_set (saved_env, name, value);
+
+ return 0;
+}
+
+static int UNUSED
+unset_var (const char *name, const char *value UNUSED, void *whitelist)
+{
+ grub_dprintf("blscfg", "restoring \"%s\"\n", name);
+ if (! whitelist)
+ {
+ grub_env_unset (name);
+ return 0;
+ }
+
+ if (test_whitelist_membership (name,
+ (const grub_env_whitelist_t *) whitelist))
+ grub_env_unset (name);
+
+ return 0;
+}
+
+static char **bls_make_list (struct bls_entry *entry, const char *key, int *num)
+{
+ int last = -1;
+ char *val;
+
+ int nlist = 0;
+ char **list = NULL;
+
+ list = grub_malloc (sizeof (char *));
+ if (!list)
+ return NULL;
+ list[0] = NULL;
+
+ while (1)
+ {
+ char **new;
+
+ val = bls_get_val (entry, key, &last);
+ if (!val)
+ break;
+
+ new = grub_realloc (list, (nlist + 2) * sizeof (char *));
+ if (!new)
+ break;
+
+ list = new;
+ list[nlist++] = val;
+ list[nlist] = NULL;
+ }
+
+ if (num)
+ *num = nlist;
+
+ return list;
+}
+
+static char *field_append(bool is_var, char *buffer, char *start, char *end)
+{
+ char *temp = grub_strndup(start, end - start + 1);
+ const char *field = temp;
+
+ if (is_var) {
+ field = grub_env_get (temp);
+ if (!field)
+ return buffer;
+ }
+
+ if (!buffer) {
+ buffer = grub_strdup(field);
+ if (!buffer)
+ return NULL;
+ } else {
+ buffer = grub_realloc (buffer, grub_strlen(buffer) + grub_strlen(field));
+ if (!buffer)
+ return NULL;
+
+ grub_stpcpy (buffer + grub_strlen(buffer), field);
+ }
+
+ return buffer;
+}
+
+static char *expand_val(char *value)
+{
+ char *buffer = NULL;
+ char *start = value;
+ char *end = value;
+ bool is_var = false;
+
+ if (!value)
+ return NULL;
+
+ while (*value) {
+ if (*value == '$') {
+ if (start != end) {
+ buffer = field_append(is_var, buffer, start, end);
+ if (!buffer)
+ return NULL;
+ }
+
+ is_var = true;
+ start = value + 1;
+ } else if (is_var) {
+ if (!grub_isalnum(*value) && *value != '_') {
+ buffer = field_append(is_var, buffer, start, end);
+ is_var = false;
+ start = value;
+ }
+ }
+
+ end = value;
+ value++;
+ }
+
+ if (start != end) {
+ buffer = field_append(is_var, buffer, start, end);
+ if (!buffer)
+ return NULL;
+ }
+
+ return buffer;
+}
+
+static char **early_initrd_list (const char *initrd)
+{
+ int nlist = 0;
+ char **list = NULL;
+ char *separator;
+
+ while ((separator = grub_strchr (initrd, ' ')))
+ {
+ list = grub_realloc (list, (nlist + 2) * sizeof (char *));
+ if (!list)
+ return NULL;
+
+ list[nlist++] = grub_strndup(initrd, separator - initrd);
+ list[nlist] = NULL;
+ initrd = separator + 1;
+ }
+
+ list = grub_realloc (list, (nlist + 2) * sizeof (char *));
+ if (!list)
+ return NULL;
+
+ list[nlist++] = grub_strndup(initrd, grub_strlen(initrd));
+ list[nlist] = NULL;
+
+ return list;
+}
+
+static void create_entry (struct bls_entry *entry)
+{
+ int argc = 0;
+ const char **argv = NULL;
+
+ char *title = NULL;
+ char *clinux = NULL;
+ char *options = NULL;
+ char **initrds = NULL;
+ char *initrd = NULL;
+ const char *early_initrd = NULL;
+ char **early_initrds = NULL;
+ char *initrd_prefix = NULL;
+ char *id = entry->filename;
+ char *dotconf = id;
+ char *hotkey = NULL;
+
+ char *users = NULL;
+ char **classes = NULL;
+
+ char **args = NULL;
+
+ char *src = NULL;
+ int i, index;
+
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ clinux = bls_get_val (entry, "linux", NULL);
+ if (!clinux)
+ {
+ grub_dprintf ("blscfg", "Skipping file %s with no 'linux' key.\n", entry->filename);
+ goto finish;
+ }
+
+ /*
+ * strip the ".conf" off the end before we make it our "id" field.
+ */
+ do
+ {
+ dotconf = grub_strstr(dotconf, ".conf");
+ } while (dotconf != NULL && dotconf[5] != '\0');
+ if (dotconf)
+ dotconf[0] = '\0';
+
+ title = bls_get_val (entry, "title", NULL);
+ options = expand_val (bls_get_val (entry, "options", NULL));
+
+ if (!options)
+ options = expand_val (grub_env_get("default_kernelopts"));
+
+ initrds = bls_make_list (entry, "initrd", NULL);
+
+ hotkey = bls_get_val (entry, "grub_hotkey", NULL);
+ users = expand_val (bls_get_val (entry, "grub_users", NULL));
+ classes = bls_make_list (entry, "grub_class", NULL);
+ args = bls_make_list (entry, "grub_arg", &argc);
+
+ argc += 1;
+ argv = grub_malloc ((argc + 1) * sizeof (char *));
+ argv[0] = title ? title : clinux;
+ for (i = 1; i < argc; i++)
+ argv[i] = args[i-1];
+ argv[argc] = NULL;
+
+ early_initrd = grub_env_get("early_initrd");
+
+ grub_dprintf ("blscfg", "adding menu entry for \"%s\" with id \"%s\"\n",
+ title, id);
+ if (early_initrd)
+ {
+ early_initrds = early_initrd_list(early_initrd);
+ if (!early_initrds)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+ goto finish;
+ }
+
+ if (initrds != NULL && initrds[0] != NULL)
+ {
+ initrd_prefix = grub_strrchr (initrds[0], '/');
+ initrd_prefix = grub_strndup(initrds[0], initrd_prefix - initrds[0] + 1);
+ }
+ else
+ {
+ initrd_prefix = grub_strrchr (clinux, '/');
+ initrd_prefix = grub_strndup(clinux, initrd_prefix - clinux + 1);
+ }
+
+ if (!initrd_prefix)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+ goto finish;
+ }
+ }
+
+ if (early_initrds || initrds)
+ {
+ int initrd_size = sizeof ("initrd");
+ char *tmp;
+
+ for (i = 0; early_initrds != NULL && early_initrds[i] != NULL; i++)
+ initrd_size += sizeof (" " GRUB_BOOT_DEVICE) \
+ + grub_strlen(initrd_prefix) \
+ + grub_strlen (early_initrds[i]) + 1;
+
+ for (i = 0; initrds != NULL && initrds[i] != NULL; i++)
+ initrd_size += sizeof (" " GRUB_BOOT_DEVICE) \
+ + grub_strlen (initrds[i]) + 1;
+ initrd_size += 1;
+
+ initrd = grub_malloc (initrd_size);
+ if (!initrd)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+ goto finish;
+ }
+
+
+ tmp = grub_stpcpy(initrd, "initrd");
+ for (i = 0; early_initrds != NULL && early_initrds[i] != NULL; i++)
+ {
+ grub_dprintf ("blscfg", "adding early initrd %s\n", early_initrds[i]);
+ tmp = grub_stpcpy (tmp, " " GRUB_BOOT_DEVICE);
+ tmp = grub_stpcpy (tmp, initrd_prefix);
+ tmp = grub_stpcpy (tmp, early_initrds[i]);
+ grub_free(early_initrds[i]);
+ }
+
+ for (i = 0; initrds != NULL && initrds[i] != NULL; i++)
+ {
+ grub_dprintf ("blscfg", "adding initrd %s\n", initrds[i]);
+ tmp = grub_stpcpy (tmp, " " GRUB_BOOT_DEVICE);
+ tmp = grub_stpcpy (tmp, initrds[i]);
+ }
+ tmp = grub_stpcpy (tmp, "\n");
+ }
+
+ src = grub_xasprintf ("load_video\n"
+ "set gfxpayload=keep\n"
+ "insmod gzio\n"
+ "linux %s%s%s%s\n"
+ "%s",
+ GRUB_BOOT_DEVICE, clinux, options ? " " : "", options ? options : "",
+ initrd ? initrd : "");
+
+ grub_normal_add_menu_entry (argc, argv, classes, id, users, hotkey, NULL, src, 0, &index, entry);
+ grub_dprintf ("blscfg", "Added entry %d id:\"%s\"\n", index, id);
+
+finish:
+ grub_free (initrd);
+ grub_free (initrd_prefix);
+ grub_free (early_initrds);
+ grub_free (initrds);
+ grub_free (options);
+ grub_free (classes);
+ grub_free (args);
+ grub_free (argv);
+ grub_free (src);
+}
+
+struct find_entry_info {
+ const char *dirname;
+ const char *devid;
+ grub_device_t dev;
+ grub_fs_t fs;
+};
+
+/*
+ * info: the filesystem object the file is on.
+ */
+static int find_entry (struct find_entry_info *info)
+{
+ struct read_entry_info read_entry_info;
+ grub_fs_t blsdir_fs = NULL;
+ grub_device_t blsdir_dev = NULL;
+ const char *blsdir = info->dirname;
+ int fallback = 0;
+ int r = 0;
+
+ if (!blsdir) {
+ blsdir = grub_env_get ("blsdir");
+ if (!blsdir)
+ blsdir = GRUB_BLS_CONFIG_PATH;
+ }
+
+ read_entry_info.file = NULL;
+ read_entry_info.dirname = blsdir;
+
+ grub_dprintf ("blscfg", "scanning blsdir: %s\n", blsdir);
+
+ blsdir_dev = info->dev;
+ blsdir_fs = info->fs;
+ read_entry_info.devid = info->devid;
+
+read_fallback:
+ r = blsdir_fs->fs_dir (blsdir_dev, read_entry_info.dirname, read_entry,
+ &read_entry_info);
+ if (r != 0) {
+ grub_dprintf ("blscfg", "read_entry returned error\n");
+ grub_err_t e;
+ do
+ {
+ e = grub_error_pop();
+ } while (e);
+ }
+
+ if (r && !info->dirname && !fallback) {
+ read_entry_info.dirname = "/boot" GRUB_BLS_CONFIG_PATH;
+ grub_dprintf ("blscfg", "Entries weren't found in %s, fallback to %s\n",
+ blsdir, read_entry_info.dirname);
+ fallback = 1;
+ goto read_fallback;
+ }
+
+ return 0;
+}
+
+static grub_err_t
+bls_load_entries (const char *path)
+{
+ grub_size_t len;
+ grub_fs_t fs;
+ grub_device_t dev;
+ static grub_err_t r;
+ const char *devid = NULL;
+ char *blsdir = NULL;
+ struct find_entry_info info = {
+ .dev = NULL,
+ .fs = NULL,
+ .dirname = NULL,
+ };
+ struct read_entry_info rei = {
+ .devid = NULL,
+ .dirname = NULL,
+ };
+
+ if (path) {
+ len = grub_strlen (path);
+ if (grub_strcmp (path + len - 5, ".conf") == 0) {
+ rei.file = grub_file_open (path, GRUB_FILE_TYPE_CONFIG);
+ if (!rei.file)
+ return grub_errno;
+ /*
+ * read_entry() closes the file
+ */
+ return read_entry(path, NULL, &rei);
+ } else if (path[0] == '(') {
+ devid = path + 1;
+
+ blsdir = grub_strchr (path, ')');