From 27c64db6dff88ebe9761dfe3b0c073d2a9bf2e41 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Sun, 5 Oct 2014 18:41:31 -0400 Subject: [PATCH] build-sys: use linux/memfd.h if available linux/memfd.h was added linux 3.17, so it might not be widely available for a while. Also, check if memfd_create is defined, for the HAVE_LINUX_MEMFD_H check to have a chance of succeeding. Also, collapse all ifdefs for memfd-related stuff, because they were all added together so there's no need to check separately. --- configure.ac | 2 ++ src/shared/memfd.c | 6 +++++- src/shared/missing.h | 14 -------------- 3 files changed, 7 insertions(+), 15 deletions(-) diff --git a/configure.ac b/configure.ac index e33c8f75ac..caf1f0e54e 100644 --- a/configure.ac +++ b/configure.ac @@ -283,6 +283,7 @@ AM_CONDITIONAL([HAVE_PYTHON_DEVEL], [test "$have_python_devel" = "yes"]) AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([*** Dynamic linking loader library not found])]) AC_CHECK_HEADERS([sys/capability.h], [], [AC_MSG_ERROR([*** POSIX caps headers not found])]) AC_CHECK_HEADERS([linux/btrfs.h], [], []) +AC_CHECK_HEADERS([linux/memfd.h], [], []) # unconditionally pull-in librt with old glibc versions AC_SEARCH_LIBS([clock_gettime], [rt], [], []) @@ -300,6 +301,7 @@ AC_SUBST(RT_LIBS) LIBS="$save_LIBS" AC_CHECK_FUNCS([fanotify_init fanotify_mark]) +AC_CHECK_FUNCS([memfd_create]) AC_CHECK_FUNCS([__secure_getenv secure_getenv]) AC_CHECK_DECLS([gettid, pivot_root, name_to_handle_at, setns, LO_FLAGS_PARTSCAN], [], [], [[ diff --git a/src/shared/memfd.c b/src/shared/memfd.c index 1feca0c979..162c12f7a7 100644 --- a/src/shared/memfd.c +++ b/src/shared/memfd.c @@ -25,11 +25,15 @@ #include #include +#ifdef HAVE_LINUX_MEMFD_H +# include +#endif + #include "util.h" #include "bus-label.h" -#include "missing.h" #include "memfd.h" #include "utf8.h" +#include "missing.h" int memfd_new(const char *name) { _cleanup_free_ char *g = NULL; diff --git a/src/shared/missing.h b/src/shared/missing.h index 031fe2d1ce..656921d687 100644 --- a/src/shared/missing.h +++ b/src/shared/missing.h @@ -65,25 +65,11 @@ #ifndef F_ADD_SEALS #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9) -#endif - -#ifndef F_GET_SEALS #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10) -#endif -#ifndef F_SEAL_SEAL #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */ -#endif - -#ifndef F_SEAL_SHRINK #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */ -#endif - -#ifndef F_SEAL_GROW #define F_SEAL_GROW 0x0004 /* prevent file from growing */ -#endif - -#ifndef F_SEAL_WRITE #define F_SEAL_WRITE 0x0008 /* prevent writes */ #endif