From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Robert Marshall <rmarshall@redhat.com>

Date: Mon, 16 Mar 2015 14:14:19 -0400

Subject: [PATCH] Use Distribution Package Sort for grub2-mkconfig (#1124074)

Users reported that newly installed kernels on their systems installed

with grub-mkconfig would not appear on the grub boot list in order

starting with the most recent. Added an option for rpm-based systems to

use the rpm-sort library to sort kernels instead.

Resolves rhbz#1124074

Signed-off-by: Robert Marshall <rmarshall@redhat.com>

[pjones: fix --enable-rpm-sort configure option]

Signed-off-by: Peter Jones <pjones@redhat.com>

[thierry.vignaud: fix build with rpm-4.16]

Signed-off-by: Thierry Vignaud <thierry.vignaud@gmail.com>

---

 configure.ac              |  38 +++++++

 Makefile.util.def         |  16 +++

 util/grub-rpm-sort.c      | 281 ++++++++++++++++++++++++++++++++++++++++++++++

 util/grub-mkconfig_lib.in |  11 +-

 util/grub-rpm-sort.8      |  12 ++

 5 files changed, 357 insertions(+), 1 deletion(-)

 create mode 100644 util/grub-rpm-sort.c

 create mode 100644 util/grub-rpm-sort.8

diff --git a/configure.ac b/configure.ac

index bec8535af70..fdcb452581c 100644

--- a/configure.ac

+++ b/configure.ac

@@ -72,6 +72,7 @@ grub_TRANSFORM([grub-mkrelpath])

 grub_TRANSFORM([grub-mkrescue])

 grub_TRANSFORM([grub-probe])

 grub_TRANSFORM([grub-reboot])

+grub_TRANSFORM([grub-rpm-sort])

 grub_TRANSFORM([grub-script-check])

 grub_TRANSFORM([grub-set-default])

 grub_TRANSFORM([grub-sparc64-setup])

@@ -95,6 +96,7 @@ grub_TRANSFORM([grub-mkrescue.1])

 grub_TRANSFORM([grub-mkstandalone.3])

 grub_TRANSFORM([grub-ofpathname.3])

 grub_TRANSFORM([grub-probe.3])

+grub_TRANSFORM([grub-rpm-sort.8])

 grub_TRANSFORM([grub-reboot.3])

 grub_TRANSFORM([grub-render-label.3])

 grub_TRANSFORM([grub-script-check.3])

@@ -1860,6 +1862,42 @@ fi

 AC_SUBST([LIBDEVMAPPER])

+AC_ARG_ENABLE([rpm-sort],

+              [AS_HELP_STRING([--enable-rpm-sort],

+                              [enable native rpm sorting of kernels in grub (default=guessed)])])

+if test x"$enable_rpm_sort" = xno ; then

+  rpm_sort_excuse="explicitly disabled"

+fi

+

+if test x"$rpm_sort_excuse" = x ; then

+  # Check for rpmlib header.

+  AC_CHECK_HEADER([rpm/rpmlib.h], [],

+               [rpm_sort_excuse="need rpm/rpmlib header"])

+fi

+

+if test x"$rpm_sort_excuse" = x ; then

+  # Check for rpm library.

+  AC_CHECK_LIB([rpm], [rpmvercmp], [],

+               [rpm_sort_excuse="rpmlib missing rpmvercmp"])

+fi

+

+if test x"$rpm_sort_excuse" = x ; then

+   LIBRPM="-lrpm";

+   AC_DEFINE([HAVE_RPM], [1],

+             [Define to 1 if you have the rpm library.])

+fi

+

+if test x"$LIBRPM" = x ; then

+  # Check for rpm library.

+  AC_CHECK_LIB([rpmio], [rpmvercmp], [],

+               [rpm_sort_excuse="rpmio missing rpmvercmp"])

+   LIBRPM="-lrpmio";

+   AC_DEFINE([HAVE_RPMIO], [1],

+             [Define to 1 if you have the rpm library.])

+fi

+

+AC_SUBST([LIBRPM])

+

 LIBGEOM=

 if test x$host_kernel = xkfreebsd; then

   AC_CHECK_LIB([geom], [geom_gettree], [],

diff --git a/Makefile.util.def b/Makefile.util.def

index 2c9b283a230..ba4cf4b29b0 100644

--- a/Makefile.util.def

+++ b/Makefile.util.def

@@ -703,6 +703,22 @@ program = {

   ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBUTIL) $(LIBZFS) $(LIBNVPAIR) $(LIBGEOM)';

 };

+program = {

+  name = grub-rpm-sort;

+  mansection = 8;

+  installdir = sbin;

+

+  common = grub-core/kern/emu/misc.c;

+  common = grub-core/kern/emu/argp_common.c;

+  common = grub-core/osdep/init.c;

+  common = util/misc.c;

+  common = util/grub-rpm-sort.c;

+

+  ldadd = libgrubkern.a;

+  ldadd = grub-core/lib/gnulib/libgnu.a;

+  ldadd = '$(LIBDEVMAPPER) $(LIBRPM)';

+};

+

 script = {

   name = grub-mkconfig;

   common = util/grub-mkconfig.in;

diff --git a/util/grub-rpm-sort.c b/util/grub-rpm-sort.c

new file mode 100644

index 00000000000..f33bd1ed568

--- /dev/null

+++ b/util/grub-rpm-sort.c

@@ -0,0 +1,281 @@

+#include <config.h>

+#include <grub/types.h>

+#include <grub/util/misc.h>

+#include <stdio.h>

+#include <stdlib.h>

+#include <unistd.h>

+#include <errno.h>

+#include <assert.h>

+#include <argp.h>

+#include <rpm/rpmlib.h>

+

+static size_t

+read_file (const char *input, char **ret)

+{

+  FILE *in;

+  size_t s;

+  size_t sz = 2048;

+  size_t offset = 0;

+  char *text;

+

+  if (!strcmp(input, "-"))

+    in = stdin;

+  else

+    in = grub_util_fopen(input, "r");

+

+  text = xmalloc (sz);

+

+  if (!in)

+    grub_util_error (_("cannot open `%s': %s"), input, strerror (errno));

+

+  while ((s = fread (text + offset, 1, sz - offset, in)) != 0)

+    {

+      offset += s;

+      if (sz - offset == 0)

+	{

+	  sz += 2048;

+	  text = xrealloc (text, sz);

+	}

+    }

+

+  text[offset] = '\0';

+  *ret = text;

+

+  if (in != stdin)

+    fclose(in);

+

+  return offset + 1;

+}

+

+/* 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 = strrchr (package_string, '-');

+

+  if (package_release != NULL)

+      *package_release++ = '\0';

+

+  *release = package_release;

+

+  /* Version */

+  package_version = 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 = (*version == NULL ? *release : *version);

+      *version = *release;

+      *release = NULL;

+    }

+  if (*version == NULL)

+    {

+      *version = *release;

+      *release = NULL;

+    }

+}

+

+/*

+ * package name-version-release comparator for qsort

+ * expects p, q which are pointers to character strings (char *)

+ * which will not be altered in this function

+ */

+static int

+package_version_compare (const void *p, const void *q)

+{

+  char *local_p, *local_q;

+  char *lhs_name, *lhs_version, *lhs_release;

+  char *rhs_name, *rhs_version, *rhs_release;

+  int vercmpflag = 0;

+

+  local_p = alloca (strlen (*(char * const *)p) + 1);

+  local_q = alloca (strlen (*(char * const *)q) + 1);

+

+  /* make sure these allocated */

+  assert (local_p);

+  assert (local_q);

+

+  strcpy (local_p, *(char * const *)p);

+  strcpy (local_q, *(char * const *)q);

+

+  split_package_string (local_p, &lhs_name, &lhs_version, &lhs_release);

+  split_package_string (local_q, &rhs_name, &rhs_version, &rhs_release);

+

+  /* Check Name and return if unequal */

+  vercmpflag = rpmvercmp ((lhs_name == NULL ? "" : lhs_name),

+                          (rhs_name == NULL ? "" : rhs_name));

+  if (vercmpflag != 0)

+    return vercmpflag;

+

+  /* Check version and return if unequal */

+  vercmpflag = rpmvercmp ((lhs_version == NULL ? "" : lhs_version),

+                          (rhs_version == NULL ? "" : rhs_version));

+  if (vercmpflag != 0)

+    return vercmpflag;

+

+  /* Check release and return the version compare value */

+  vercmpflag = rpmvercmp ((lhs_release == NULL ? "" : lhs_release),

+                          (rhs_release == NULL ? "" : rhs_release));

+

+  return vercmpflag;

+}

+

+static void

+add_input (const char *filename, char ***package_names, size_t *n_package_names)

+{

+  char *orig_input_buffer = NULL;

+  char *input_buffer;

+  char *position_of_newline;

+  char **names = *package_names;

+  char **new_names = NULL;

+  size_t n_names = *n_package_names;

+

+  if (!*package_names)

+    new_names = names = xmalloc (sizeof (char *) * 2);

+

+  if (read_file (filename, &orig_input_buffer) < 2)

+    {

+      if (new_names)

+	free (new_names);

+      if (orig_input_buffer)

+	free (orig_input_buffer);

+      return;

+    }

+

+  input_buffer = orig_input_buffer;

+  while (input_buffer && *input_buffer &&

+	 (position_of_newline = strchrnul (input_buffer, '\n')))

+    {

+      size_t sz = position_of_newline - input_buffer;

+      char *new;

+

+      if (sz == 0)

+	{

+	  input_buffer = position_of_newline + 1;

+	  continue;

+	}

+

+      new = xmalloc (sz+1);

+      strncpy (new, input_buffer, sz);

+      new[sz] = '\0';

+

+      names = xrealloc (names, sizeof (char *) * (n_names + 1));

+      names[n_names] = new;

+      n_names++;

+

+      /* move buffer ahead to next line */

+      input_buffer = position_of_newline + 1;

+      if (*position_of_newline == '\0')

+	input_buffer = NULL;

+    }

+

+  free (orig_input_buffer);

+

+  *package_names = names;

+  *n_package_names = n_names;

+}

+

+static char *

+help_filter (int key, const char *text, void *input __attribute__ ((unused)))

+{

+  return (char *)text;

+}

+

+static struct argp_option options[] = {

+  { 0, }

+};

+

+struct arguments

+{

+  size_t ninputs;

+  size_t input_max;

+  char **inputs;

+};

+

+static error_t

+argp_parser (int key, char *arg, struct argp_state *state)

+{

+  struct arguments *arguments = state->input;

+  switch (key)

+    {

+    case ARGP_KEY_ARG:

+      assert (arguments->ninputs < arguments->input_max);

+      arguments->inputs[arguments->ninputs++] = xstrdup (arg);

+      break;

+    default:

+      return ARGP_ERR_UNKNOWN;

+    }

+  return 0;

+}

+

+static struct argp argp = {

+  options, argp_parser, N_("[INPUT_FILES]"),

+  N_("Sort a list of strings in RPM version sort order."),

+  NULL, help_filter, NULL

+};

+

+int

+main (int argc, char *argv[])

+{

+  struct arguments arguments;

+  char **package_names = NULL;

+  size_t n_package_names = 0;

+  int i;

+

+  grub_util_host_init (&argc, &argv);

+

+  memset (&arguments, 0, sizeof (struct arguments));

+  arguments.input_max = argc+1;

+  arguments.inputs = xmalloc ((arguments.input_max + 1)

+			      * sizeof (arguments.inputs[0]));

+  memset (arguments.inputs, 0, (arguments.input_max + 1)

+	  * sizeof (arguments.inputs[0]));

+

+  /* Parse our arguments */

+  if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)

+    grub_util_error ("%s", _("Error in parsing command line arguments\n"));

+

+  /* If there's no inputs in argv, add one for stdin */

+  if (!arguments.ninputs)

+    {

+      arguments.ninputs = 1;

+      arguments.inputs[0] = xmalloc (2);

+      strcpy(arguments.inputs[0], "-");

+    }

+

+  for (i = 0; i < arguments.ninputs; i++)

+    add_input(arguments.inputs[i], &package_names, &n_package_names);

+

+  if (package_names == NULL || n_package_names < 1)

+    grub_util_error ("%s", _("Invalid input\n"));

+

+  qsort (package_names, n_package_names, sizeof (char *),

+	 package_version_compare);

+

+  /* send sorted list to stdout */

+  for (i = 0; i < n_package_names; i++)

+    {

+      fprintf (stdout, "%s\n", package_names[i]);

+      free (package_names[i]);

+    }

+

+  free (package_names);

+  for (i = 0; i < arguments.ninputs; i++)

+    free (arguments.inputs[i]);

+

+  free (arguments.inputs);

+

+  return 0;

+}

diff --git a/util/grub-mkconfig_lib.in b/util/grub-mkconfig_lib.in

index 0f6505bf3b6..42c2ea9ba50 100644

--- a/util/grub-mkconfig_lib.in

+++ b/util/grub-mkconfig_lib.in

@@ -33,6 +33,9 @@ fi

 if test "x$grub_mkrelpath" = x; then

   grub_mkrelpath="${bindir}/@grub_mkrelpath@"

 fi

+if test "x$grub_rpm_sort" = x; then

+  grub_rpm_sort="${sbindir}/@grub_rpm_sort@"

+fi

 if command -v gettext >/dev/null; then

   :

@@ -218,6 +221,12 @@ version_sort ()

    esac

 }

+if [ "x$grub_rpm_sort" != x -a -x "$grub_rpm_sort" ]; then

+  kernel_sort="$grub_rpm_sort"

+else

+  kernel_sort=version_sort

+fi

+

 version_test_numeric ()

 {

   version_test_numeric_a="$1"

@@ -234,7 +243,7 @@ version_test_numeric ()

     version_test_numeric_a="$version_test_numeric_b"

     version_test_numeric_b="$version_test_numeric_c"

   fi

-  if (echo "$version_test_numeric_a" ; echo "$version_test_numeric_b") | version_sort | head -n 1 | grep -qx "$version_test_numeric_b" ; then

+  if (echo "$version_test_numeric_a" ; echo "$version_test_numeric_b") | "$kernel_sort" | head -n 1 | grep -qx "$version_test_numeric_b" ; then

     return 0

   else

     return 1

diff --git a/util/grub-rpm-sort.8 b/util/grub-rpm-sort.8

new file mode 100644

index 00000000000..8ce21488448

--- /dev/null

+++ b/util/grub-rpm-sort.8

@@ -0,0 +1,12 @@

+.TH GRUB-RPM-SORT 8 "Wed Feb 26 2014"

+.SH NAME

+\fBgrub-rpm-sort\fR \(em Sort input according to RPM version compare.

+

+.SH SYNOPSIS

+\fBgrub-rpm-sort\fR [OPTIONS].

+

+.SH DESCRIPTION

+You should not normally run this program directly.  Use grub-mkconfig instead.

+

+.SH SEE ALSO

+.BR "info grub"