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commit 542923d949e8b2480e48bd85fea13cf5d00d30b7
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Thu Oct 8 15:33:00 2020 +0200
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elf: Implement ld.so --version
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This prints out version information for the dynamic loader and
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exits immediately, without further command line processing
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(which seems to match what some GNU tools do).
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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diff --git a/elf/dl-main.h b/elf/dl-main.h
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index ac7249a580214860..b51256d3b48230b0 100644
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--- a/elf/dl-main.h
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+++ b/elf/dl-main.h
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@@ -105,6 +105,9 @@ call_init_paths (const struct dl_main_state *state)
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_Noreturn void _dl_usage (const char *argv0, const char *wrong_option)
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attribute_hidden;
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+/* Print ld.so version information and exit. */
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+_Noreturn void _dl_version (void) attribute_hidden;
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+
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/* Print ld.so --help output and exit. */
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_Noreturn void _dl_help (const char *argv0, struct dl_main_state *state)
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attribute_hidden;
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diff --git a/elf/dl-usage.c b/elf/dl-usage.c
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index c1820dca2fa117ee..f3c5ac76d37f9c03 100644
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--- a/elf/dl-usage.c
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+++ b/elf/dl-usage.c
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@@ -20,6 +20,7 @@
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#include <dl-main.h>
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#include <ldsodefs.h>
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#include <unistd.h>
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+#include "version.h"
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void
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_dl_usage (const char *argv0, const char *wrong_option)
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@@ -32,6 +33,19 @@ _dl_usage (const char *argv0, const char *wrong_option)
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_exit (EXIT_FAILURE);
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}
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+void
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+_dl_version (void)
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+{
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+ _dl_printf ("\
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+ld.so " PKGVERSION RELEASE " release version " VERSION ".\n\
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+Copyright (C) 2020 Free Software Foundation, Inc.\n\
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+This is free software; see the source for copying conditions.\n\
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+There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
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+PARTICULAR PURPOSE.\n\
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+");
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+ _exit (EXIT_SUCCESS);
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+}
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+
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void
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_dl_help (const char *argv0, struct dl_main_state *state)
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{
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@@ -61,6 +75,7 @@ of this helper program; chances are you did not intend to run this program.\n\
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--preload LIST preload objects named in LIST\n\
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--argv0 STRING set argv[0] to STRING before running\n\
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--help display this help and exit\n\
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+ --version output version information and exit\n\
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",
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argv0);
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_exit (EXIT_SUCCESS);
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diff --git a/elf/rtld.c b/elf/rtld.c
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index b92641cb1c2d99a6..da1eef108508b95f 100644
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--- a/elf/rtld.c
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+++ b/elf/rtld.c
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@@ -1248,6 +1248,8 @@ dl_main (const ElfW(Phdr) *phdr,
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--_dl_argc;
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++_dl_argv;
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}
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+ else if (strcmp (_dl_argv[1], "--version") == 0)
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+ _dl_version ();
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else if (_dl_argv[1][0] == '-' && _dl_argv[1][1] == '-')
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{
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if (_dl_argv[1][1] == '\0')
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