[libvirt] [PATCH v1 1/7] configure: Check for statfs

[Michal Privoznik]

The statfs(2) gets filesystem statistics. Currently, we use it only on
linux, and leave stub to implement on other platforms. But hey, other
platforms (like FreeBSD) have statfs() too. If we check it in
configure we can wider platforms supported. Speaking of FreeBSD, the
headers to include are of course different: sys/param.h and
sys/mount.h on the FreeBSD and sys/statfs.h on the Linux. The header
files are checked too.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 configure.ac       |  4 ++--
 src/util/virfile.c | 21 ++++++++++++++-------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8001e24..68ebf75 100644
--- a/configure.ac
+++ b/configure.ac
@@ -275,7 +275,7 @@ dnl and various less common threadsafe functions
 AC_CHECK_FUNCS_ONCE([cfmakeraw fallocate geteuid getgid getgrnam_r \
   getmntent_r getpwuid_r getuid kill mmap newlocale posix_fallocate \
   posix_memalign prlimit regexec sched_getaffinity setgroups setns \
-  setrlimit symlink sysctlbyname getifaddrs])
+  setrlimit symlink sysctlbyname getifaddrs statfs])
 
 dnl Availability of pthread functions. Because of $LIB_PTHREAD, we
 dnl cannot use AC_CHECK_FUNCS_ONCE. LIB_PTHREAD and LIBMULTITHREAD
@@ -316,7 +316,7 @@ dnl Availability of various common headers (non-fatal if missing).
 AC_CHECK_HEADERS([pwd.h paths.h regex.h sys/un.h \
   sys/poll.h syslog.h mntent.h net/ethernet.h linux/magic.h \
   sys/un.h sys/syscall.h sys/sysctl.h netinet/tcp.h ifaddrs.h \
-  libtasn1.h sys/ucred.h sys/mount.h])
+  libtasn1.h sys/ucred.h sys/mount.h sys/param.h sys/statfs.h])
 dnl Check whether endian provides handy macros.
 AC_CHECK_DECLS([htole64], [], [], [[#include <endian.h>]])
 
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 463064c..699b9f8 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -43,11 +43,15 @@
 # include <sys/mman.h>
 #endif
 
-#ifdef __linux__
-# if HAVE_LINUX_MAGIC_H
-#  include <linux/magic.h>
-# endif
+#if HAVE_LINUX_MAGIC_H
+# include <linux/magic.h>
+#endif
+
+#ifdef HAVE_SYS_STATFS_H
 # include <sys/statfs.h>
+#elif defined HAVE_SYS_PARAM_H && defined HAVE_SYS_MOUNT_H
+# include <sys/param.h>
+# include <sys/mount.h>
 #endif
 
 #if defined(__linux__) && HAVE_DECL_LO_FLAGS_AUTOCLEAR
@@ -2817,7 +2821,7 @@ int virFilePrintf(FILE *fp, const char *msg, ...)
 }
 
 
-#ifdef __linux__
+#ifdef HAVE_STATFS
 
 # ifndef NFS_SUPER_MAGIC
 #  define NFS_SUPER_MAGIC 0x6969
@@ -2909,14 +2913,17 @@ virFileIsSharedFSType(const char *path,
 
     return 0;
 }
-#else
+
+#else /* ! HAVE_STATFS */
+
 int virFileIsSharedFSType(const char *path ATTRIBUTE_UNUSED,
                           int fstypes ATTRIBUTE_UNUSED)
 {
     /* XXX implement me :-) */
     return 0;
 }
-#endif
+
+#endif /* HAVE_STATFS */
 
 int virFileIsSharedFS(const char *path)
 {
-- 
1.8.5.5