forked from rpms/glibc
165 lines
4.5 KiB
Diff
165 lines
4.5 KiB
Diff
commit 9f9503b56a8c7566c91d486a67be5d41792a87ca
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed Jul 13 14:06:00 2016 +0200
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sln: Install as a hard link to ldconfig
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Implementing and sln and ldconfig with the same binary saves
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around 850 KiB from a glibc installation.
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The sln program is implicitly tested during the build, so no test
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case is needed.
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diff --git a/elf/Makefile b/elf/Makefile
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index 593403c..d90f21a 100644
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--- a/elf/Makefile
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+++ b/elf/Makefile
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@@ -70,12 +70,8 @@ install-others = $(inst_rtlddir)/$(rtld-installed-name)
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install-bin-script = ldd
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endif
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-others = sprof sln
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+others = sprof
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install-bin = sprof
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-others-static = sln
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-install-rootsbin = sln
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-sln-modules := static-stubs
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-extra-objs += $(sln-modules:=.o)
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ifeq (yes,$(use-ldconfig))
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ifeq (yes,$(build-shared))
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@@ -83,8 +79,16 @@ others-static += ldconfig
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others += ldconfig
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install-rootsbin += ldconfig
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-ldconfig-modules := cache readlib xmalloc xstrdup chroot_canon static-stubs
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+ldconfig-modules := cache readlib xmalloc xstrdup chroot_canon static-stubs sln
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extra-objs += $(ldconfig-modules:=.o)
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+
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+# Install sln as a hard link to ldconfig.
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+install-others-programs += $(inst_rootsbindir)/sln
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+others: $(objpfx)sln
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+$(objpfx)sln: $(objpfx)ldconfig
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+ ln -f $< $@
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+$(inst_rootsbindir)/sln: $(inst_rootsbindir)/ldconfig
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+ ln -f $< $@
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endif
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endif
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@@ -466,8 +470,6 @@ $(objpfx)ldd: ldd.bash.in $(common-objpfx)soversions.mk \
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$(objpfx)sprof: $(libdl)
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-$(objpfx)sln: $(sln-modules:%=$(objpfx)%.o)
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-
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$(objpfx)ldconfig: $(ldconfig-modules:%=$(objpfx)%.o)
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SYSCONF-FLAGS := -D'SYSCONFDIR="$(sysconfdir)"'
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diff --git a/elf/ldconfig.c b/elf/ldconfig.c
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index 467ca82..972737c 100644
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--- a/elf/ldconfig.c
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+++ b/elf/ldconfig.c
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@@ -44,6 +44,8 @@
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#include <dl-procinfo.h>
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+#include "sln.h"
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+
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#ifdef _DL_FIRST_PLATFORM
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# define _DL_FIRST_EXTRA (_DL_FIRST_PLATFORM + _DL_PLATFORMS_COUNT)
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#else
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@@ -1275,6 +1277,9 @@ main (int argc, char **argv)
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/* Set the text message domain. */
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textdomain (_libc_intl_domainname);
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+ if (run_sln (argv[0]))
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+ return sln_main (argc, argv);
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+
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/* Parse and process arguments. */
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int remaining;
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argp_parse (&argp, argc, argv, 0, &remaining, NULL);
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diff --git a/elf/sln.c b/elf/sln.c
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index fa4ccec..c6889d7 100644
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--- a/elf/sln.c
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+++ b/elf/sln.c
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@@ -1,4 +1,4 @@
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-/* `sln' program to create symbolic links between files.
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+/* sln helper to create symbolic links between files, invoked from ldconfig.
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Copyright (C) 1998-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@@ -31,21 +31,29 @@
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#include "../version.h"
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-#define PACKAGE _libc_intl_domainname
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+#include "sln.h"
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static int makesymlink (const char *src, const char *dest);
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static int makesymlinks (const char *file);
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static void usage (void);
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-int
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-main (int argc, char **argv)
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+/* Check if we have to run sln. */
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+bool
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+run_sln (const char *argv0)
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{
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- /* Set locale via LC_ALL. */
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- setlocale (LC_ALL, "");
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-
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- /* Set the text message domain. */
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- textdomain (PACKAGE);
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+ const char *slash = strrchr (argv0, '/');
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+ const char *progname;
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+ if (slash == NULL)
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+ progname = argv0;
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+ else
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+ progname = slash + 1;
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+ return strcmp (progname, "sln") == 0;
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+}
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+/* Invoked from ldconfig. */
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+int
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+sln_main (int argc, char **argv)
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+{
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switch (argc)
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{
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case 2:
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diff --git a/elf/sln.h b/elf/sln.h
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new file mode 100644
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index 0000000..a3a16ab
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--- /dev/null
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+++ b/elf/sln.h
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@@ -0,0 +1,30 @@
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+/* Interface of the sln command-line tool.
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+ Copyright (C) 2016 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#ifndef SLN_H
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+#define SLN_H
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+
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+#include <stdbool.h>
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+
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+/* Return true if main should invoke sln_main. */
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+bool run_sln (const char *argv0);
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+
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+/* Main routine of the sln command. */
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+int sln_main (int argc, char **argv);
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+
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+#endif /* SLN_H */
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