Blame SOURCES/0046-Use-Distribution-Package-Sort-for-grub2-mkconfig-112.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Robert Marshall <rmarshall@redhat.com>
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Date: Mon, 16 Mar 2015 14:14:19 -0400
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Subject: [PATCH] Use Distribution Package Sort for grub2-mkconfig (#1124074)
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Users reported that newly installed kernels on their systems installed
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with grub-mkconfig would not appear on the grub boot list in order
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starting with the most recent. Added an option for rpm-based systems to
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use the rpm-sort library to sort kernels instead.
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Resolves rhbz#1124074
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Signed-off-by: Robert Marshall <rmarshall@redhat.com>
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[pjones: fix --enable-rpm-sort configure option]
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Signed-off-by: Peter Jones <pjones@redhat.com>
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[thierry.vignaud: fix build with rpm-4.16]
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Signed-off-by: Thierry Vignaud <thierry.vignaud@gmail.com>
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---
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 configure.ac              |  38 +++++++
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 Makefile.util.def         |  16 +++
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 util/grub-rpm-sort.c      | 281 ++++++++++++++++++++++++++++++++++++++++++++++
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 util/grub-mkconfig_lib.in |  11 +-
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 util/grub-rpm-sort.8      |  12 ++
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 5 files changed, 357 insertions(+), 1 deletion(-)
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 create mode 100644 util/grub-rpm-sort.c
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 create mode 100644 util/grub-rpm-sort.8
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diff --git a/configure.ac b/configure.ac
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index bec8535af70..fdcb452581c 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -72,6 +72,7 @@ grub_TRANSFORM([grub-mkrelpath])
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 grub_TRANSFORM([grub-mkrescue])
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 grub_TRANSFORM([grub-probe])
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 grub_TRANSFORM([grub-reboot])
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+grub_TRANSFORM([grub-rpm-sort])
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 grub_TRANSFORM([grub-script-check])
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 grub_TRANSFORM([grub-set-default])
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 grub_TRANSFORM([grub-sparc64-setup])
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@@ -95,6 +96,7 @@ grub_TRANSFORM([grub-mkrescue.1])
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 grub_TRANSFORM([grub-mkstandalone.3])
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 grub_TRANSFORM([grub-ofpathname.3])
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 grub_TRANSFORM([grub-probe.3])
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+grub_TRANSFORM([grub-rpm-sort.8])
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 grub_TRANSFORM([grub-reboot.3])
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 grub_TRANSFORM([grub-render-label.3])
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 grub_TRANSFORM([grub-script-check.3])
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@@ -1860,6 +1862,42 @@ fi
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 AC_SUBST([LIBDEVMAPPER])
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+AC_ARG_ENABLE([rpm-sort],
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+              [AS_HELP_STRING([--enable-rpm-sort],
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+                              [enable native rpm sorting of kernels in grub (default=guessed)])])
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+if test x"$enable_rpm_sort" = xno ; then
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+  rpm_sort_excuse="explicitly disabled"
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+fi
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+
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+if test x"$rpm_sort_excuse" = x ; then
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+  # Check for rpmlib header.
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+  AC_CHECK_HEADER([rpm/rpmlib.h], [],
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+               [rpm_sort_excuse="need rpm/rpmlib header"])
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+fi
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+
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+if test x"$rpm_sort_excuse" = x ; then
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+  # Check for rpm library.
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+  AC_CHECK_LIB([rpm], [rpmvercmp], [],
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+               [rpm_sort_excuse="rpmlib missing rpmvercmp"])
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+fi
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+
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+if test x"$rpm_sort_excuse" = x ; then
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+   LIBRPM="-lrpm";
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+   AC_DEFINE([HAVE_RPM], [1],
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+             [Define to 1 if you have the rpm library.])
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+fi
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+
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+if test x"$LIBRPM" = x ; then
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+  # Check for rpm library.
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+  AC_CHECK_LIB([rpmio], [rpmvercmp], [],
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+               [rpm_sort_excuse="rpmio missing rpmvercmp"])
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+   LIBRPM="-lrpmio";
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+   AC_DEFINE([HAVE_RPMIO], [1],
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+             [Define to 1 if you have the rpm library.])
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+fi
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+
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+AC_SUBST([LIBRPM])
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+
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 LIBGEOM=
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 if test x$host_kernel = xkfreebsd; then
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   AC_CHECK_LIB([geom], [geom_gettree], [],
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diff --git a/Makefile.util.def b/Makefile.util.def
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index 2c9b283a230..ba4cf4b29b0 100644
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--- a/Makefile.util.def
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+++ b/Makefile.util.def
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@@ -703,6 +703,22 @@ program = {
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   ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBUTIL) $(LIBZFS) $(LIBNVPAIR) $(LIBGEOM)';
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 };
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+program = {
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+  name = grub-rpm-sort;
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+  mansection = 8;
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+  installdir = sbin;
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+
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+  common = grub-core/kern/emu/misc.c;
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+  common = grub-core/kern/emu/argp_common.c;
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+  common = grub-core/osdep/init.c;
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+  common = util/misc.c;
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+  common = util/grub-rpm-sort.c;
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+
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+  ldadd = libgrubkern.a;
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+  ldadd = grub-core/lib/gnulib/libgnu.a;
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+  ldadd = '$(LIBDEVMAPPER) $(LIBRPM)';
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+};
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+
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 script = {
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   name = grub-mkconfig;
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   common = util/grub-mkconfig.in;
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diff --git a/util/grub-rpm-sort.c b/util/grub-rpm-sort.c
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new file mode 100644
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index 00000000000..f33bd1ed568
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--- /dev/null
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+++ b/util/grub-rpm-sort.c
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@@ -0,0 +1,281 @@
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+#include <config.h>
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+#include <grub/types.h>
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+#include <grub/util/misc.h>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <unistd.h>
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+#include <errno.h>
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+#include <assert.h>
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+#include <argp.h>
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+#include <rpm/rpmlib.h>
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+
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+static size_t
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+read_file (const char *input, char **ret)
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+{
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+  FILE *in;
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+  size_t s;
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+  size_t sz = 2048;
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+  size_t offset = 0;
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+  char *text;
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+
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+  if (!strcmp(input, "-"))
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+    in = stdin;
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+  else
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+    in = grub_util_fopen(input, "r");
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+
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+  text = xmalloc (sz);
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+
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+  if (!in)
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+    grub_util_error (_("cannot open `%s': %s"), input, strerror (errno));
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+
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+  while ((s = fread (text + offset, 1, sz - offset, in)) != 0)
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+    {
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+      offset += s;
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+      if (sz - offset == 0)
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+	{
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+	  sz += 2048;
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+	  text = xrealloc (text, sz);
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+	}
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+    }
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+
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+  text[offset] = '\0';
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+  *ret = text;
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+
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+  if (in != stdin)
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+    fclose(in);
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+
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+  return offset + 1;
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+}
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+
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+/* returns name/version/release */
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+/* NULL string pointer returned if nothing found */
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+static void
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+split_package_string (char *package_string, char **name,
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+                     char **version, char **release)
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+{
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+  char *package_version, *package_release;
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+
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+  /* Release */
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+  package_release = strrchr (package_string, '-');
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+
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+  if (package_release != NULL)
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+      *package_release++ = '\0';
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+
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+  *release = package_release;
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+
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+  /* Version */
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+  package_version = strrchr(package_string, '-');
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+
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+  if (package_version != NULL)
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+      *package_version++ = '\0';
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+
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+  *version = package_version;
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+  /* Name */
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+  *name = package_string;
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+
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+  /* Bubble up non-null values from release to name */
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+  if (*name == NULL)
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+    {
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+      *name = (*version == NULL ? *release : *version);
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+      *version = *release;
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+      *release = NULL;
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+    }
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+  if (*version == NULL)
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+    {
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+      *version = *release;
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+      *release = NULL;
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+    }
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+}
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+
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+/*
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+ * package name-version-release comparator for qsort
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+ * expects p, q which are pointers to character strings (char *)
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+ * which will not be altered in this function
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+ */
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+static int
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+package_version_compare (const void *p, const void *q)
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+{
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+  char *local_p, *local_q;
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+  char *lhs_name, *lhs_version, *lhs_release;
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+  char *rhs_name, *rhs_version, *rhs_release;
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+  int vercmpflag = 0;
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+
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+  local_p = alloca (strlen (*(char * const *)p) + 1);
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+  local_q = alloca (strlen (*(char * const *)q) + 1);
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+
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+  /* make sure these allocated */
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+  assert (local_p);
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+  assert (local_q);
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+
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+  strcpy (local_p, *(char * const *)p);
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+  strcpy (local_q, *(char * const *)q);
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+
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+  split_package_string (local_p, &lhs_name, &lhs_version, &lhs_release);
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+  split_package_string (local_q, &rhs_name, &rhs_version, &rhs_release);
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+
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+  /* Check Name and return if unequal */
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+  vercmpflag = rpmvercmp ((lhs_name == NULL ? "" : lhs_name),
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+                          (rhs_name == NULL ? "" : rhs_name));
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+  if (vercmpflag != 0)
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+    return vercmpflag;
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+
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+  /* Check version and return if unequal */
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+  vercmpflag = rpmvercmp ((lhs_version == NULL ? "" : lhs_version),
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+                          (rhs_version == NULL ? "" : rhs_version));
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+  if (vercmpflag != 0)
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+    return vercmpflag;
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+
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+  /* Check release and return the version compare value */
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+  vercmpflag = rpmvercmp ((lhs_release == NULL ? "" : lhs_release),
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+                          (rhs_release == NULL ? "" : rhs_release));
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+
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+  return vercmpflag;
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+}
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+
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+static void
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+add_input (const char *filename, char ***package_names, size_t *n_package_names)
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+{
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+  char *orig_input_buffer = NULL;
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+  char *input_buffer;
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+  char *position_of_newline;
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+  char **names = *package_names;
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+  char **new_names = NULL;
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+  size_t n_names = *n_package_names;
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+
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+  if (!*package_names)
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+    new_names = names = xmalloc (sizeof (char *) * 2);
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+
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+  if (read_file (filename, &orig_input_buffer) < 2)
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+    {
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+      if (new_names)
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+	free (new_names);
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+      if (orig_input_buffer)
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+	free (orig_input_buffer);
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+      return;
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+    }
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+
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+  input_buffer = orig_input_buffer;
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+  while (input_buffer && *input_buffer &&
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+	 (position_of_newline = strchrnul (input_buffer, '\n')))
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+    {
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+      size_t sz = position_of_newline - input_buffer;
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+      char *new;
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+
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+      if (sz == 0)
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+	{
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+	  input_buffer = position_of_newline + 1;
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+	  continue;
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+	}
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+
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+      new = xmalloc (sz+1);
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+      strncpy (new, input_buffer, sz);
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+      new[sz] = '\0';
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+
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+      names = xrealloc (names, sizeof (char *) * (n_names + 1));
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+      names[n_names] = new;
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+      n_names++;
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+
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+      /* move buffer ahead to next line */
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+      input_buffer = position_of_newline + 1;
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+      if (*position_of_newline == '\0')
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+	input_buffer = NULL;
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+    }
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+
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+  free (orig_input_buffer);
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+
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+  *package_names = names;
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+  *n_package_names = n_names;
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+}
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+
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+static char *
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+help_filter (int key, const char *text, void *input __attribute__ ((unused)))
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+{
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+  return (char *)text;
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+}
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+
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+static struct argp_option options[] = {
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+  { 0, }
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+};
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+
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+struct arguments
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+{
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+  size_t ninputs;
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+  size_t input_max;
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+  char **inputs;
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+};
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+
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+static error_t
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+argp_parser (int key, char *arg, struct argp_state *state)
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+{
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+  struct arguments *arguments = state->input;
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+  switch (key)
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+    {
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+    case ARGP_KEY_ARG:
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+      assert (arguments->ninputs < arguments->input_max);
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+      arguments->inputs[arguments->ninputs++] = xstrdup (arg);
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+      break;
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+    default:
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+      return ARGP_ERR_UNKNOWN;
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+    }
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+  return 0;
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+}
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+
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+static struct argp argp = {
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+  options, argp_parser, N_("[INPUT_FILES]"),
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+  N_("Sort a list of strings in RPM version sort order."),
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+  NULL, help_filter, NULL
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+};
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+
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+int
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+main (int argc, char *argv[])
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+{
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+  struct arguments arguments;
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+  char **package_names = NULL;
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+  size_t n_package_names = 0;
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+  int i;
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+
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+  grub_util_host_init (&argc, &argv);
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+
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+  memset (&arguments, 0, sizeof (struct arguments));
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+  arguments.input_max = argc+1;
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+  arguments.inputs = xmalloc ((arguments.input_max + 1)
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+			      * sizeof (arguments.inputs[0]));
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+  memset (arguments.inputs, 0, (arguments.input_max + 1)
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+	  * sizeof (arguments.inputs[0]));
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+
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+  /* Parse our arguments */
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+  if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
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+    grub_util_error ("%s", _("Error in parsing command line arguments\n"));
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+
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+  /* If there's no inputs in argv, add one for stdin */
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+  if (!arguments.ninputs)
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+    {
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+      arguments.ninputs = 1;
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+      arguments.inputs[0] = xmalloc (2);
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+      strcpy(arguments.inputs[0], "-");
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+    }
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+
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+  for (i = 0; i < arguments.ninputs; i++)
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+    add_input(arguments.inputs[i], &package_names, &n_package_names);
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+
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+  if (package_names == NULL || n_package_names < 1)
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+    grub_util_error ("%s", _("Invalid input\n"));
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+
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+  qsort (package_names, n_package_names, sizeof (char *),
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+	 package_version_compare);
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+
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+  /* send sorted list to stdout */
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+  for (i = 0; i < n_package_names; i++)
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+    {
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+      fprintf (stdout, "%s\n", package_names[i]);
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+      free (package_names[i]);
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+    }
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+
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+  free (package_names);
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+  for (i = 0; i < arguments.ninputs; i++)
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+    free (arguments.inputs[i]);
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+
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+  free (arguments.inputs);
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+
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+  return 0;
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+}
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diff --git a/util/grub-mkconfig_lib.in b/util/grub-mkconfig_lib.in
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index 0f6505bf3b6..42c2ea9ba50 100644
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--- a/util/grub-mkconfig_lib.in
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+++ b/util/grub-mkconfig_lib.in
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@@ -33,6 +33,9 @@ fi
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 if test "x$grub_mkrelpath" = x; then
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   grub_mkrelpath="${bindir}/@grub_mkrelpath@"
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 fi
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+if test "x$grub_rpm_sort" = x; then
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+  grub_rpm_sort="${sbindir}/@grub_rpm_sort@"
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+fi
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 if command -v gettext >/dev/null; then
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   :
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@@ -218,6 +221,12 @@ version_sort ()
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    esac
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 }
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+if [ "x$grub_rpm_sort" != x -a -x "$grub_rpm_sort" ]; then
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+  kernel_sort="$grub_rpm_sort"
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+else
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+  kernel_sort=version_sort
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+fi
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+
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 version_test_numeric ()
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 {
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   version_test_numeric_a="$1"
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@@ -234,7 +243,7 @@ version_test_numeric ()
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     version_test_numeric_a="$version_test_numeric_b"
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     version_test_numeric_b="$version_test_numeric_c"
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   fi
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-  if (echo "$version_test_numeric_a" ; echo "$version_test_numeric_b") | version_sort | head -n 1 | grep -qx "$version_test_numeric_b" ; then
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+  if (echo "$version_test_numeric_a" ; echo "$version_test_numeric_b") | "$kernel_sort" | head -n 1 | grep -qx "$version_test_numeric_b" ; then
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     return 0
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   else
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     return 1
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diff --git a/util/grub-rpm-sort.8 b/util/grub-rpm-sort.8
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new file mode 100644
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index 00000000000..8ce21488448
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--- /dev/null
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+++ b/util/grub-rpm-sort.8
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@@ -0,0 +1,12 @@
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+.TH GRUB-RPM-SORT 8 "Wed Feb 26 2014"
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+.SH NAME
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+\fBgrub-rpm-sort\fR \(em Sort input according to RPM version compare.
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+
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+.SH SYNOPSIS
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+\fBgrub-rpm-sort\fR [OPTIONS].
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+
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+.SH DESCRIPTION
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+You should not normally run this program directly.  Use grub-mkconfig instead.
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+
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+.SH SEE ALSO
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+.BR "info grub"