rpms/grub2
7
0
Fork 0
Code Issues Pull Requests Releases Activity
70dc0337f9
grub2/0269-Add-blscfg-command-support-to-parse-BootLoaderSpec-c.patch
Peter Jones 70dc0337f9 Once more...
2018-07-17 10:50:12 -04:00

1158 lines
29 KiB
Diff
Raw Blame History

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Fri, 9 Dec 2016 15:40:58 -0500
Subject: [PATCH] Add blscfg command support to parse BootLoaderSpec config
fragments
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.
GRUB2 already has a blscfg modle that can parse the config snippets using
the bls_import command, change it to blscfg and improve the BLS support.
---
grub-core/Makefile.core.def | 4 +-
grub-core/commands/blscfg.c | 796 ++++++++++++++++++++++++++++++++++++++++---
grub-core/commands/loadenv.c | 77 +----
grub-core/commands/loadenv.h | 93 +++++
include/grub/compiler.h | 2 +
5 files changed, 840 insertions(+), 132 deletions(-)
create mode 100644 grub-core/commands/loadenv.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 86c8e38e880..27ee5117b79 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -129,6 +129,7 @@ kernel = {
common = kern/rescue_parser.c;
common = kern/rescue_reader.c;
common = kern/term.c;
+ common = kern/qsort.c;
noemu = kern/compiler-rt.c;
noemu = kern/mm.c;
@@ -775,8 +776,7 @@ module = {
module = {
name = blscfg;
common = commands/blscfg.c;
- enable = i386_efi;
- enable = x86_64_efi;
+ enable = efi;
enable = i386_pc;
};
diff --git a/grub-core/commands/blscfg.c b/grub-core/commands/blscfg.c
index 4274aca5a9d..86796c8cd83 100644
--- a/grub-core/commands/blscfg.c
+++ b/grub-core/commands/blscfg.c
@@ -30,32 +30,405 @@
#include <grub/env.h>
#include <grub/file.h>
#include <grub/normal.h>
+#include <grub/lib/envblk.h>
GRUB_MOD_LICENSE ("GPLv3+");
+#include "loadenv.h"
+
+#define GRUB_BLS_CONFIG_PATH "/loader/entries/"
+#define GRUB_BOOT_DEVICE "($root)"
#ifdef GRUB_MACHINE_EFI
#define GRUB_LINUX_CMD "linuxefi"
#define GRUB_INITRD_CMD "initrdefi"
-#define GRUB_BLS_CONFIG_PATH "/EFI/fedora/loader/entries/"
-#define GRUB_BOOT_DEVICE "($boot)"
#else
#define GRUB_LINUX_CMD "linux"
#define GRUB_INITRD_CMD "initrd"
-#define GRUB_BLS_CONFIG_PATH "/loader/entries/"
-#define GRUB_BOOT_DEVICE "($root)"
#endif
-static int parse_entry (
+#define grub_free(x) ({grub_dprintf("blscfg", "%s freeing %p\n", __func__, x); grub_free(x); })
+
+struct keyval
+{
+ const char *key;
+ char *val;
+};
+
+struct bls_entry
+{
+ struct keyval **keyvals;
+ int nkeyvals;
+};
+
+static struct bls_entry **entries;
+static int nentries;
+
+static struct bls_entry *bls_new_entry(void)
+{
+ struct bls_entry **new_entries;
+ struct bls_entry *entry;
+ int new_n = nentries + 1;
+
+ new_entries = grub_realloc (entries, new_n * sizeof (struct bls_entry *));
+ if (!new_entries)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry list");
+ return NULL;
+ }
+
+ entries = new_entries;
+
+ entry = grub_malloc (sizeof (*entry));
+ if (!entry)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY,
+ "couldn't find space for BLS entry list");
+ return NULL;
+ }
+
+ grub_memset (entry, 0, sizeof (*entry));
+ entries[nentries] = entry;
+
+ nentries = new_n;
+
+ return entry;
+}
+
+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:%p:%p\n", entry->keyvals[entry->nkeyvals], k, v);
+ entry->nkeyvals = new_n;
+
+ return 0;
+}
+
+static void bls_free_entry(struct bls_entry *entry)
+{
+ int i;
+
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ for (i = 0; i < entry->nkeyvals; i++)
+ {
+ struct keyval *kv = entry->keyvals[i];
+ grub_free ((void *)kv->key);
+ grub_free (kv->val);
+ grub_free (kv);
+ }
+
+ grub_free (entry->keyvals);
+ grub_memset (entry, 0, sizeof (*entry));
+ grub_free (entry);
+}
+
+static int keyval_cmp (const void *p0, const void *p1,
+ void *state UNUSED)
+{
+ const struct keyval *kv0 = *(struct keyval * const *)p0;
+ const struct keyval *kv1 = *(struct keyval * const *)p1;
+ int rc;
+
+ rc = grub_strcmp(kv0->key, kv1->key);
+
+ return rc;
+}
+
+/* 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. */
+static char *bls_get_val(struct bls_entry *entry, const char *keyname, int *last)
+{
+ char *foo = (char *)"";
+ struct keyval *kv = NULL, **kvp, key = {keyname, foo}, *keyp = &key;
+
+ /* if we've already found an entry that matches, just iterate */
+ if (last && *last >= 0)
+ {
+ int next = ++last[0];
+
+ if (next == entry->nkeyvals)
+ {
+done:
+ *last = -1;
+ return NULL;
+ }
+
+ kv = entry->keyvals[next];
+ if (grub_strcmp (keyname, kv->key))
+ goto done;
+
+ return kv->val;
+ }
+
+ kvp = grub_bsearch(&keyp, &entry->keyvals[0], entry->nkeyvals,
+ sizeof (struct keyval *), keyval_cmp, NULL);
+ if (kvp)
+ kv = *kvp;
+
+ if (kv)
+ {
+ /* if we've got uninitialized but present state, track back until we find
+ * the first match */
+ if (last)
+ {
+ grub_dprintf("blscfg", "%s trying to find another entry because last was set\n", __func__);
+ /* figure out the position of this entry in the array */
+ int idx;
+ for (idx = 0 ; idx < entry->nkeyvals; idx++)
+ if (entry->keyvals[idx] == kv)
+ break;
+ *last = idx;
+
+ while (idx > 0)
+ {
+ struct keyval *kvtmp = entry->keyvals[idx-1];
+ if (idx == 0 || grub_strcmp (keyname, kvtmp->key))
+ {
+ /* if we're at the start, or if the previous entry doesn't
+ * match, then we're done */
+ *last = idx;
+ break;
+ }
+ else
+ /* but if it does match, keep going backwards */
+ idx--;
+ }
+ }
+
+ return kv->val;
+ }
+ return NULL;
+}
+
+#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 got here\n", __func__);
+ 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;
+}
+
+typedef int (*void_cmp_t)(void *, void *);
+
+static int nulcmp(char *s0, char *s1, void_cmp_t cmp)
+{
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ if (s1 && !s0)
+ return 1;
+ if (s0 && !s1)
+ return -1;
+ if (!s0 && !s1)
+ return 0;
+ if (cmp)
+ return cmp(s0, s1);
+ return grub_strcmp(s0, s1);
+}
+
+static int
+bls_keyval_cmp(struct bls_entry *e0, struct bls_entry *e1, const char *keyname)
+{
+ char *val0, *val1;
+
+ val0 = bls_get_val (e0, keyname, NULL);
+ val1 = bls_get_val (e1, keyname, NULL);
+
+ if (val1 && !val0)
+ return 1;
+
+ if (val0 && !val1)
+ return -1;
+
+ if (!val0 && !val1)
+ return 0;
+
+ return nulcmp(val0, val1, (void_cmp_t)vercmp);
+}
+
+static int bls_cmp(const void *p0, const void *p1, void *state UNUSED)
+{
+ struct bls_entry * e0 = *(struct bls_entry **)p0;
+ struct bls_entry * e1 = *(struct bls_entry **)p1;
+ int rc = 0;
+
+ rc = bls_keyval_cmp (e0, e1, "id");
+
+ if (rc == 0)
+ rc = bls_keyval_cmp (e0, e1, "title");
+
+ if (rc == 0)
+ rc = bls_keyval_cmp (e0, e1, "linux");
+
+ return rc;
+}
+
+static int read_entry (
const char *filename,
- const struct grub_dirhook_info *info __attribute__ ((unused)),
- void *data __attribute__ ((unused)))
+ const struct grub_dirhook_info *info UNUSED,
+ void *data)
{
grub_size_t n;
char *p;
grub_file_t f = NULL;
grub_off_t sz;
- char *title = NULL, *options = NULL, *clinux = NULL, *initrd = NULL, *src = NULL;
- const char *args[2] = { NULL, NULL };
+ struct bls_entry *entry;
+ const char *dirname= (const char *)data;
+ const char *devid = grub_env_get ("boot");
+
+ grub_dprintf ("blscfg", "filename: \"%s\"\n", filename);
if (filename[0] == '.')
return 0;
@@ -67,7 +440,7 @@ static int parse_entry (
if (grub_strcmp (filename + n - 5, ".conf") != 0)
return 0;
- p = grub_xasprintf (GRUB_BLS_CONFIG_PATH "%s", filename);
+ p = grub_xasprintf ("(%s)%s/%s", devid, dirname, filename);
f = grub_file_open (p);
if (!f)
@@ -77,54 +450,169 @@ static int parse_entry (
if (sz == GRUB_FILE_SIZE_UNKNOWN || sz > 1024*1024)
goto finish;
+ entry = bls_new_entry();
+ if (!entry)
+ goto finish;
+
for (;;)
{
char *buf;
+ char *separator;
+ int rc;
buf = grub_file_getline (f);
if (!buf)
break;
- if (grub_strncmp (buf, "title ", 6) == 0)
- {
- grub_free (title);
- title = grub_strdup (buf + 6);
- if (!title)
- goto finish;
- }
- else if (grub_strncmp (buf, "options ", 8) == 0)
- {
- grub_free (options);
- options = grub_strdup (buf + 8);
- if (!options)
- goto finish;
- }
- else if (grub_strncmp (buf, "linux ", 6) == 0)
- {
- grub_free (clinux);
- clinux = grub_strdup (buf + 6);
- if (!clinux)
- goto finish;
- }
- else if (grub_strncmp (buf, "initrd ", 7) == 0)
+ 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 (initrd);
- initrd = grub_strdup (buf + 7);
- if (!initrd)
- goto finish;
+ grub_free (buf);
+ break;
}
- grub_free(buf);
+ separator[0] = '\0';
+
+ rc = bls_add_keyval (entry, buf, separator+1);
+ grub_free (buf);
+ if (rc < 0)
+ break;
+ }
+
+ grub_qsort(&entry->keyvals[0], entry->nkeyvals, sizeof (struct keyval *),
+ keyval_cmp, NULL);
+
+finish:
+ grub_free (p);
+
+ if (f)
+ grub_file_close (f);
+
+ return 0;
+}
+
+static grub_envblk_t saved_env = NULL;
+
+static int
+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
+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 (!linux)
+ 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 void create_entry (struct bls_entry *entry, const char *cfgfile)
+{
+ int argc = 0;
+ const char **argv = NULL;
+
+ char *title = NULL;
+ char *clinux = NULL;
+ char *options = NULL;
+ char *initrd = NULL;
+ char *id = NULL;
+ char *hotkey = NULL;
+
+ char *users = NULL;
+ char **classes = NULL;
+
+ char **args = NULL;
+
+ char *src = NULL;
+ int i;
+
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ clinux = bls_get_val (entry, "linux", NULL);
+ if (!clinux)
{
- grub_printf ("Skipping file %s with no 'linux' key.", p);
+ grub_dprintf ("blscfg", "Skipping file %s with no 'linux' key.\n", cfgfile);
goto finish;
}
- args[0] = title ? title : filename;
+ title = bls_get_val (entry, "title", NULL);
+ options = bls_get_val (entry, "options", NULL);
+ initrd = bls_get_val (entry, "initrd", NULL);
+ id = bls_get_val (entry, "id", NULL);
+ hotkey = bls_get_val (entry, "grub_hotkey", NULL);
+ users = 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;
+
+ grub_dprintf("blscfg", "adding menu entry for \"%s\"\n", title);
src = grub_xasprintf ("load_video\n"
"set gfx_payload=keep\n"
"insmod gzio\n"
@@ -133,40 +621,219 @@ static int parse_entry (
GRUB_BOOT_DEVICE, clinux, options ? " " : "", options ? options : "",
initrd ? GRUB_INITRD_CMD " " : "", initrd ? GRUB_BOOT_DEVICE : "", initrd ? initrd : "", initrd ? "\n" : "");
- grub_normal_add_menu_entry (1, args, NULL, NULL, "bls", NULL, NULL, src, 0);
+ grub_normal_add_menu_entry (argc, argv, classes, id, users, hotkey, NULL, src, 0);
finish:
- grub_free (p);
- grub_free (title);
- grub_free (options);
- grub_free (clinux);
- grub_free (initrd);
- grub_free (src);
+ if (classes)
+ grub_free (classes);
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ if (args)
+ grub_free (args);
+
+ if (argv)
+ grub_free (argv);
+
+ if (src)
+ grub_free (src);
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+}
+
+struct find_entry_info {
+ grub_device_t dev;
+ grub_fs_t fs;
+ int efi;
+};
+
+/*
+ * filename: if the directory is /EFI/something/ , filename is "something"
+ * info: unused
+ * data: the filesystem object the file is on.
+ */
+static int find_entry (const char *filename,
+ const struct grub_dirhook_info *dirhook_info UNUSED,
+ void *data)
+{
+ struct find_entry_info *info = (struct find_entry_info *)data;
+ grub_file_t f = NULL;
+ char *grubenv_path = NULL;
+ grub_envblk_t env = NULL;
+ char *default_blsdir = NULL;
+ const char *blsdir = NULL;
+ char *saved_env_buf = NULL;
+ int r = 0;
+ const char *devid = grub_env_get ("boot");
+
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ if (!grub_strcmp (filename, ".") ||
+ !grub_strcmp (filename, ".."))
+ return 0;
+
+ if (info->efi && !grub_strcasecmp (filename, "boot"))
+ return 0;
+
+ saved_env_buf = grub_malloc (512);
+
+ // set a default blsdir
+ if (info->efi)
+ default_blsdir = grub_xasprintf ("/EFI/%s%s", filename,
+ GRUB_BLS_CONFIG_PATH);
+ else
+ default_blsdir = grub_xasprintf ("%s", GRUB_BLS_CONFIG_PATH);
+
+ grub_env_set ("blsdir", default_blsdir);
+ grub_dprintf ("blscfg", "default_blsdir: \"%s\"\n", default_blsdir);
+
+ /*
+ * try to load a grubenv from /EFI/wherever/grubenv
+ */
+ if (info->efi)
+ grubenv_path = grub_xasprintf ("(%s)/EFI/%s/grubenv", devid, filename);
+ else
+ grubenv_path = grub_xasprintf ("(%s)/grub2/grubenv", devid);
+
+ grub_dprintf ("blscfg", "looking for \"%s\"\n", grubenv_path);
+ f = grub_file_open (grubenv_path);
+
+ grub_dprintf ("blscfg", "%s it\n", f ? "found" : "did not find");
+ grub_free (grubenv_path);
+ if (f)
+ {
+ grub_off_t sz;
+
+ grub_dprintf ("blscfg", "getting size\n");
+ sz = grub_file_size (f);
+ if (sz == GRUB_FILE_SIZE_UNKNOWN || sz > 1024*1024)
+ goto finish;
+
+ grub_dprintf ("blscfg", "reading env\n");
+ env = read_envblk_file (f);
+ if (!env)
+ goto finish;
+ grub_dprintf ("blscfg", "read env file\n");
+
+ grub_memset (saved_env_buf, '#', 512);
+ grub_memcpy (saved_env_buf, GRUB_ENVBLK_SIGNATURE,
+ sizeof (GRUB_ENVBLK_SIGNATURE));
+ grub_dprintf ("blscfg", "saving env\n");
+ saved_env = grub_envblk_open (saved_env_buf, 512);
+ if (!saved_env)
+ goto finish;
+
+ // save everything listed in "env" with values from our existing grub env
+ grub_envblk_iterate (env, NULL, save_var);
+ // set everything from our loaded grubenv into the real grub env
+ grub_envblk_iterate (env, NULL, set_var);
+ }
+ else
+ {
+ grub_err_t e;
+ grub_dprintf ("blscfg", "no such file\n");
+ do
+ {
+ e = grub_error_pop();
+ } while (e);
+
+ }
+
+ blsdir = grub_env_get ("blsdir");
+ if (!blsdir)
+ goto finish;
+
+ grub_dprintf ("blscfg", "blsdir: \"%s\"\n", blsdir);
+ if (blsdir[0] != '/' && info->efi)
+ blsdir = grub_xasprintf ("/EFI/%s/%s/", filename, blsdir);
+ else
+ blsdir = grub_strdup (blsdir);
+
+ if (!blsdir)
+ goto finish;
+
+ grub_dprintf ("blscfg", "blsdir: \"%s\"\n", blsdir);
+ r = info->fs->dir (info->dev, blsdir, read_entry, (char *)blsdir);
+ if (r != 0) {
+ grub_dprintf ("blscfg", "read_entry returned error\n");
+ grub_err_t e;
+ do
+ {
+ e = grub_error_pop();
+ } while (e);
+ }
+
+ grub_dprintf ("blscfg", "Sorting %d entries\n", nentries);
+ grub_qsort(&entries[0], nentries, sizeof (struct bls_entry *), bls_cmp, NULL);
+
+ grub_dprintf ("blscfg", "%s Creating %d entries from bls\n", __func__, nentries);
+ for (r = nentries - 1; r >= 0; r--)
+ create_entry(entries[r], filename);
+
+ for (r = 0; r < nentries; r++)
+ bls_free_entry (entries[r]);
+finish:
+ nentries = 0;
+
+ grub_free (entries);
+ entries = NULL;
+
+ grub_free ((char *)blsdir);
+
+ grub_env_unset ("blsdir");
+
+ if (saved_env)
+ {
+ // remove everything from the real environment that's defined in env
+ grub_envblk_iterate (env, NULL, unset_var);
+
+ // re-set the things from our original environment
+ grub_envblk_iterate (saved_env, NULL, set_var);
+ grub_envblk_close (saved_env);
+ saved_env = NULL;
+ }
+ else if (saved_env_buf)
+ {
+ // if we have a saved environment, grub_envblk_close() freed this.
+ grub_free (saved_env_buf);
+ }
+
+ if (env)
+ grub_envblk_close (env);
if (f)
grub_file_close (f);
+ grub_free (default_blsdir);
+
return 0;
}
static grub_err_t
-grub_cmd_bls_import (grub_extcmd_context_t ctxt __attribute__ ((unused)),
- int argc __attribute__ ((unused)),
- char **args __attribute__ ((unused)))
+grub_cmd_blscfg (grub_extcmd_context_t ctxt UNUSED,
+ int argc UNUSED,
+ char **args UNUSED)
{
grub_fs_t fs;
grub_device_t dev;
static grub_err_t r;
const char *devid;
+ struct find_entry_info info =
+ {
+ .dev = NULL,
+ .fs = NULL,
+ .efi = 0,
+ };
- devid = grub_env_get ("root");
+
+ grub_dprintf ("blscfg", "finding boot\n");
+ devid = grub_env_get ("boot");
if (!devid)
- return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("variable `%s' isn't set"), "root");
+ return grub_error (GRUB_ERR_FILE_NOT_FOUND,
+ N_("variable `%s' isn't set"), "boot");
+ grub_dprintf ("blscfg", "opening %s\n", devid);
dev = grub_device_open (devid);
if (!dev)
return grub_errno;
+ grub_dprintf ("blscfg", "probing fs\n");
fs = grub_fs_probe (dev);
if (!fs)
{
@@ -174,7 +841,17 @@ grub_cmd_bls_import (grub_extcmd_context_t ctxt __attribute__ ((unused)),
goto finish;
}
- r = fs->dir (dev, GRUB_BLS_CONFIG_PATH, parse_entry, NULL);
+ info.dev = dev;
+ info.fs = fs;
+#ifdef GRUB_MACHINE_EFI
+ info.efi = 1;
+ grub_dprintf ("blscfg", "scanning /EFI/\n");
+ r = fs->dir (dev, "/EFI/", find_entry, &info);
+#else
+ info.efi = 0;
+ grub_dprintf ("blscfg", "scanning %s\n", GRUB_BLS_CONFIG_PATH);
+ r = fs->dir (dev, "/", find_entry, &info);
+#endif
finish:
if (dev)
@@ -184,18 +861,27 @@ finish:
}
static grub_extcmd_t cmd;
+static grub_extcmd_t oldcmd;
GRUB_MOD_INIT(bls)
{
- cmd = grub_register_extcmd ("bls_import",
- grub_cmd_bls_import,
+ grub_dprintf("blscfg", "%s got here\n", __func__);
+ cmd = grub_register_extcmd ("blscfg",
+ grub_cmd_blscfg,
0,
NULL,
N_("Import Boot Loader Specification snippets."),
NULL);
+ oldcmd = grub_register_extcmd ("bls_import",
+ grub_cmd_blscfg,
+ 0,
+ NULL,
+ N_("Import Boot Loader Specification snippets."),
+ NULL);
}
GRUB_MOD_FINI(bls)
{
grub_unregister_extcmd (cmd);
+ grub_unregister_extcmd (oldcmd);
}
diff --git a/grub-core/commands/loadenv.c b/grub-core/commands/loadenv.c
index acd93d123ed..91c99456091 100644
--- a/grub-core/commands/loadenv.c
+++ b/grub-core/commands/loadenv.c
@@ -28,6 +28,8 @@
#include <grub/extcmd.h>
#include <grub/i18n.h>
+#include "loadenv.h"
+
GRUB_MOD_LICENSE ("GPLv3+");
static const struct grub_arg_option options[] =
@@ -84,81 +86,6 @@ open_envblk_file (char *filename, int untrusted)
return file;
}
-static grub_envblk_t
-read_envblk_file (grub_file_t file)
-{
- grub_off_t offset = 0;
- char *buf;
- grub_size_t size = grub_file_size (file);
- grub_envblk_t envblk;
-
- buf = grub_malloc (size);
- if (! buf)
- return 0;
-
- while (size > 0)
- {
- grub_ssize_t ret;
-
- ret = grub_file_read (file, buf + offset, size);
- if (ret <= 0)
- {
- grub_free (buf);
- return 0;
- }
-
- size -= ret;
- offset += ret;
- }
-
- envblk = grub_envblk_open (buf, offset);
- if (! envblk)
- {
- grub_free (buf);
- grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid environment block");
- return 0;
- }
-
- return envblk;
-}
-
-struct grub_env_whitelist
-{
- grub_size_t len;
- char **list;
-};
-typedef struct grub_env_whitelist grub_env_whitelist_t;
-
-static int
-test_whitelist_membership (const char* name,
- const grub_env_whitelist_t* whitelist)
-{
- grub_size_t i;
-
- for (i = 0; i < whitelist->len; i++)
- if (grub_strcmp (name, whitelist->list[i]) == 0)
- return 1; /* found it */
-
- return 0; /* not found */
-}
-
-/* Helper for grub_cmd_load_env. */
-static int
-set_var (const char *name, const char *value, void *whitelist)
-{
- if (! whitelist)
- {
- grub_env_set (name, value);
- return 0;
- }
-
- if (test_whitelist_membership (name,
- (const grub_env_whitelist_t *) whitelist))
- grub_env_set (name, value);
-
- return 0;
-}
-
static grub_err_t
grub_cmd_load_env (grub_extcmd_context_t ctxt, int argc, char **args)
{
diff --git a/grub-core/commands/loadenv.h b/grub-core/commands/loadenv.h
new file mode 100644
index 00000000000..952f46121bd
--- /dev/null
+++ b/grub-core/commands/loadenv.h
@@ -0,0 +1,93 @@
+/* loadenv.c - command to load/save environment variable. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2008,2009,2010 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 <http://www.gnu.org/licenses/>.
+ */
+
+static grub_envblk_t UNUSED
+read_envblk_file (grub_file_t file)
+{
+ grub_off_t offset = 0;
+ char *buf;
+ grub_size_t size = grub_file_size (file);
+ grub_envblk_t envblk;
+
+ buf = grub_malloc (size);
+ if (! buf)
+ return 0;
+
+ while (size > 0)
+ {
+ grub_ssize_t ret;
+
+ ret = grub_file_read (file, buf + offset, size);
+ if (ret <= 0)
+ {
+ grub_free (buf);
+ return 0;
+ }
+
+ size -= ret;
+ offset += ret;
+ }
+
+ envblk = grub_envblk_open (buf, offset);
+ if (! envblk)
+ {
+ grub_free (buf);
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid environment block");
+ return 0;
+ }
+
+ return envblk;
+}
+
+struct grub_env_whitelist
+{
+ grub_size_t len;
+ char **list;
+};
+typedef struct grub_env_whitelist grub_env_whitelist_t;
+
+static int UNUSED
+test_whitelist_membership (const char* name,
+ const grub_env_whitelist_t* whitelist)
+{
+ grub_size_t i;
+
+ for (i = 0; i < whitelist->len; i++)
+ if (grub_strcmp (name, whitelist->list[i]) == 0)
+ return 1; /* found it */
+
+ return 0; /* not found */
+}
+
+/* Helper for grub_cmd_load_env. */
+static int UNUSED
+set_var (const char *name, const char *value, void *whitelist)
+{
+ if (! whitelist)
+ {
+ grub_env_set (name, value);
+ return 0;
+ }
+
+ if (test_whitelist_membership (name,
+ (const grub_env_whitelist_t *) whitelist))
+ grub_env_set (name, value);
+
+ return 0;
+}
diff --git a/include/grub/compiler.h b/include/grub/compiler.h
index c9e1d7a73dc..9859ff4cc79 100644
--- a/include/grub/compiler.h
+++ b/include/grub/compiler.h
@@ -48,4 +48,6 @@
# define WARN_UNUSED_RESULT
#endif
+#define UNUSED __attribute__((__unused__))
+
#endif /* ! GRUB_COMPILER_HEADER */
Reference in New Issue View Git Blame Copy Permalink