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grub2/0097-Add-linux-and-initrd-commands-for-grub-emu.patch
Javier Martinez Canillas e1531466e1
Update to grub 2.04 
This change updates grub to the 2.04 release. The new release changed how
grub is built, so the bootstrap and bootstrap.conf files have to be added
to the dist-git. Also, the gitignore file changed so it has to be updated.

Since the patches have been forward ported to 2.04, there's no need for a
logic to maintain a patch with the delta between the release and the grub
master branch. So the release-to-master.patch is dropped and no longer is
updated by the do-rebase script.

Also since gnulib isn't part of the grub repository anymore and cloned by
the boostrap tool, a gnulib tarball is included as other source file and
copied before calling the bootstrap tool. That way grub can be built even
in builders that only have access to the sources lookaside cache.

Resolves: rhbz#1727279

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2019-08-15 08:04:53 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Tue, 6 Feb 2018 09:09:00 +0100
Subject: [PATCH] Add linux and initrd commands for grub-emu
When using grub-emu, the linux and initrd commands are used as arguments
to the kexec command line tool, to allow booting the selected menu entry.
---
grub-core/Makefile.core.def | 1 -
grub-core/kern/emu/main.c | 4 +
grub-core/kern/emu/misc.c | 18 ++++-
grub-core/loader/emu/linux.c | 172 +++++++++++++++++++++++++++++++++++++++++++
include/grub/emu/exec.h | 4 +-
include/grub/emu/hostfile.h | 3 +-
include/grub/emu/misc.h | 3 +
grub-core/Makefile.am | 1 +
8 files changed, 202 insertions(+), 4 deletions(-)
create mode 100644 grub-core/loader/emu/linux.c
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index ebc558019cd..528f76a8c8e 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1802,7 +1802,6 @@ module = {
common = loader/linux.c;
common = lib/cmdline.c;
- enable = noemu;
efi = loader/efi/linux.c;
};
diff --git a/grub-core/kern/emu/main.c b/grub-core/kern/emu/main.c
index 55ea5a11ccd..846fe9715ec 100644
--- a/grub-core/kern/emu/main.c
+++ b/grub-core/kern/emu/main.c
@@ -107,6 +107,7 @@ static struct argp_option options[] = {
N_("use GRUB files in the directory DIR [default=%s]"), 0},
{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
{"hold", 'H', N_("SECS"), OPTION_ARG_OPTIONAL, N_("wait until a debugger will attach"), 0},
+ {"kexec", 'X', 0, 0, N_("try the untryable."), 0},
{ 0, 0, 0, 0, 0, 0 }
};
@@ -164,6 +165,9 @@ argp_parser (int key, char *arg, struct argp_state *state)
case 'v':
verbosity++;
break;
+ case 'X':
+ grub_util_set_kexecute();
+ break;
case ARGP_KEY_ARG:
{
diff --git a/grub-core/kern/emu/misc.c b/grub-core/kern/emu/misc.c
index 19cd007d448..245b69cab51 100644
--- a/grub-core/kern/emu/misc.c
+++ b/grub-core/kern/emu/misc.c
@@ -39,6 +39,7 @@
#include <grub/emu/misc.h>
int verbosity;
+int kexecute;
void
grub_util_warn (const char *fmt, ...)
@@ -82,7 +83,7 @@ grub_util_error (const char *fmt, ...)
vfprintf (stderr, fmt, ap);
va_end (ap);
fprintf (stderr, ".\n");
- exit (1);
+ grub_exit (1);
}
void *
@@ -142,6 +143,9 @@ void
__attribute__ ((noreturn))
grub_exit (int rc)
{
+#if defined (GRUB_KERNEL)
+ grub_reboot();
+#endif
exit (rc < 0 ? 1 : rc);
}
#endif
@@ -203,3 +207,15 @@ grub_util_load_image (const char *path, char *buf)
fclose (fp);
}
+
+void
+grub_util_set_kexecute(void)
+{
+ kexecute++;
+}
+
+int
+grub_util_get_kexecute(void)
+{
+ return kexecute;
+}
diff --git a/grub-core/loader/emu/linux.c b/grub-core/loader/emu/linux.c
new file mode 100644
index 00000000000..fda9e00d24c
--- /dev/null
+++ b/grub-core/loader/emu/linux.c
@@ -0,0 +1,172 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2006,2007,2008,2009,2010 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/>.
+ */
+
+#include <grub/loader.h>
+#include <grub/dl.h>
+#include <grub/command.h>
+#include <grub/time.h>
+
+#include <grub/emu/exec.h>
+#include <grub/emu/hostfile.h>
+#include <grub/emu/misc.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_dl_t my_mod;
+
+static char *kernel_path;
+static char *initrd_path;
+static char *boot_cmdline;
+
+static grub_err_t
+grub_linux_boot (void)
+{
+ grub_err_t rc = GRUB_ERR_NONE;
+ char *initrd_param;
+ const char *kexec[] = { "kexec", "-l", kernel_path, boot_cmdline, NULL, NULL };
+ const char *systemctl[] = { "systemctl", "kexec", NULL };
+ int kexecute = grub_util_get_kexecute();
+
+ if (initrd_path) {
+ initrd_param = grub_xasprintf("--initrd=%s", initrd_path);
+ kexec[3] = initrd_param;
+ kexec[4] = boot_cmdline;
+ } else {
+ initrd_param = grub_xasprintf("%s", "");
+ }
+
+ grub_printf("%serforming 'kexec -l %s %s %s'\n",
+ (kexecute) ? "P" : "Not p",
+ kernel_path, initrd_param, boot_cmdline);
+
+ if (kexecute)
+ rc = grub_util_exec(kexec);
+
+ grub_free(initrd_param);
+
+ if (rc != GRUB_ERR_NONE) {
+ grub_error (rc, N_("Error trying to perform kexec load operation."));
+ grub_sleep (3);
+ return rc;
+ }
+ if (kexecute < 1)
+ grub_fatal (N_("Use '"PACKAGE"-emu --kexec' to force a system restart."));
+
+ grub_printf("Performing 'systemctl kexec' (%s) ",
+ (kexecute==1) ? "do-or-die" : "just-in-case");
+ rc = grub_util_exec (systemctl);
+
+ if (kexecute == 1)
+ grub_fatal (N_("Error trying to perform 'systemctl kexec'"));
+
+ /* need to check read-only root before resetting hard!? */
+ grub_printf("Performing 'kexec -e'");
+ kexec[1] = "-e";
+ kexec[2] = NULL;
+ rc = grub_util_exec(kexec);
+ if ( rc != GRUB_ERR_NONE )
+ grub_fatal (N_("Error trying to directly perform 'kexec -e'."));
+
+ return rc;
+}
+
+static grub_err_t
+grub_linux_unload (void)
+{
+ grub_dl_unref (my_mod);
+ if ( boot_cmdline != NULL )
+ grub_free (boot_cmdline);
+ boot_cmdline = NULL;
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), int argc, char *argv[])
+{
+ int i;
+ char *tempstr;
+
+ grub_dl_ref (my_mod);
+
+ if (argc == 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ if ( !grub_util_is_regular(argv[0]) )
+ return grub_error(GRUB_ERR_FILE_NOT_FOUND, N_("Cannot find kernel file %s"), argv[0]);
+
+ if ( kernel_path != NULL )
+ grub_free(kernel_path);
+
+ kernel_path = grub_xasprintf("%s", argv[0]);
+
+ if ( boot_cmdline != NULL ) {
+ grub_free(boot_cmdline);
+ boot_cmdline = NULL;
+ }
+
+ if ( argc > 1 )
+ {
+ boot_cmdline = grub_xasprintf("--command-line=%s", argv[1]);
+ for ( i = 2; i < argc; i++ ) {
+ tempstr = grub_xasprintf("%s %s", boot_cmdline, argv[i]);
+ grub_free(boot_cmdline);
+ boot_cmdline = tempstr;
+ }
+ }
+
+ grub_loader_set (grub_linux_boot, grub_linux_unload, 0);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), int argc, char *argv[])
+{
+ if (argc == 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ if ( !grub_util_is_regular(argv[0]) )
+ return grub_error(GRUB_ERR_FILE_NOT_FOUND, N_("Cannot find initrd file %s"), argv[0]);
+
+ if ( initrd_path != NULL )
+ grub_free(initrd_path);
+
+ initrd_path = grub_xasprintf("%s", argv[0]);
+
+ grub_dl_unref (my_mod);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_command_t cmd_linux, cmd_initrd;
+
+GRUB_MOD_INIT(linux)
+{
+ cmd_linux = grub_register_command ("linux", grub_cmd_linux, 0, N_("Load Linux."));
+ cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd, 0, N_("Load initrd."));
+ my_mod = mod;
+ kernel_path = NULL;
+ initrd_path = NULL;
+ boot_cmdline = NULL;
+}
+
+GRUB_MOD_FINI(linux)
+{
+ grub_unregister_command (cmd_linux);
+ grub_unregister_command (cmd_initrd);
+}
diff --git a/include/grub/emu/exec.h b/include/grub/emu/exec.h
index d1073ef86af..1b61b4a2e5d 100644
--- a/include/grub/emu/exec.h
+++ b/include/grub/emu/exec.h
@@ -23,6 +23,8 @@
#include <stdarg.h>
#include <sys/types.h>
+#include <grub/symbol.h>
+
pid_t
grub_util_exec_pipe (const char *const *argv, int *fd);
pid_t
@@ -32,7 +34,7 @@ int
grub_util_exec_redirect_all (const char *const *argv, const char *stdin_file,
const char *stdout_file, const char *stderr_file);
int
-grub_util_exec (const char *const *argv);
+EXPORT_FUNC(grub_util_exec) (const char *const *argv);
int
grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
const char *stdout_file);
diff --git a/include/grub/emu/hostfile.h b/include/grub/emu/hostfile.h
index cfb1e2b5661..a61568e36e9 100644
--- a/include/grub/emu/hostfile.h
+++ b/include/grub/emu/hostfile.h
@@ -22,6 +22,7 @@
#include <grub/disk.h>
#include <grub/partition.h>
#include <sys/types.h>
+#include <grub/symbol.h>
#include <grub/osdep/hostfile.h>
int
@@ -29,7 +30,7 @@ grub_util_is_directory (const char *path);
int
grub_util_is_special_file (const char *path);
int
-grub_util_is_regular (const char *path);
+EXPORT_FUNC(grub_util_is_regular) (const char *path);
char *
grub_util_path_concat (size_t n, ...);
diff --git a/include/grub/emu/misc.h b/include/grub/emu/misc.h
index ce464cfd007..5ef4f79e689 100644
--- a/include/grub/emu/misc.h
+++ b/include/grub/emu/misc.h
@@ -56,6 +56,9 @@ void EXPORT_FUNC(grub_util_warn) (const char *fmt, ...) __attribute__ ((format (
void EXPORT_FUNC(grub_util_info) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));
void EXPORT_FUNC(grub_util_error) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2), noreturn));
+void EXPORT_FUNC(grub_util_set_kexecute) (void);
+int EXPORT_FUNC(grub_util_get_kexecute) (void) WARN_UNUSED_RESULT;
+
grub_uint64_t EXPORT_FUNC (grub_util_get_cpu_time_ms) (void);
#ifdef HAVE_DEVICE_MAPPER
diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
index c6ba5b2d763..5ff3afd62fa 100644
--- a/grub-core/Makefile.am
+++ b/grub-core/Makefile.am
@@ -304,6 +304,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/emu/net.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/emu/hostdisk.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/emu/hostfile.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/extcmd.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/emu/exec.h
if COND_GRUB_EMU_SDL
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/sdl.h
endif
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