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authorBjörn Jacke <bj@sernet.de>2009-12-04 23:26:47 +0100
committerBjörn Jacke <bj@sernet.de>2009-12-04 23:29:56 +0100
commit3264a98ff16de899d11ef37b98a7d7a7c763fe22 (patch)
tree6a9429c89af375793e05485c1751adb8ebf0c954
parent32915ceefc718621e2e9b17fee97da82744ab67a (diff)
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s3: check if glibc has broken posix_fallocate
-rw-r--r--source3/configure.in16
-rw-r--r--source3/lib/system.c2
2 files changed, 17 insertions, 1 deletions
diff --git a/source3/configure.in b/source3/configure.in
index c7ad8e7d27..16fbf88be8 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -2977,6 +2977,22 @@ exit(1);
fi
fi
+# glibc up to 2.3.6 had dangerously broken posix_fallocate(). DON'T USE IT.
+AC_CACHE_CHECK([for broken posix_fallocate],samba_cv_HAVE_BROKEN_POSIX_FALLOCATE,[
+AC_TRY_COMPILE([
+ #define _XOPEN_SOURCE 600
+ #include <stdlib.h>
+ #if defined(__GLIBC__) && ((__GLIBC__ < 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4))
+ probably broken posix_fallocate
+ #endif
+], [
+],
+samba_cv_HAVE_BROKEN_POSIX_FALLOCATE=no,samba_cv_HAVE_BROKEN_POSIX_FALLOCATE=yes)])
+if test x"$samba_cv_HAVE_BROKEN_POSIX_FALLOCATE" = xyes; then
+ AC_DEFINE(HAVE_BROKEN_POSIX_FALLOCATE,, Whether we have a broken posix_fallocate)
+fi
+
+
AC_CACHE_CHECK([for st_blocks in struct stat],samba_cv_HAVE_STAT_ST_BLOCKS,[
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/stat.h>
diff --git a/source3/lib/system.c b/source3/lib/system.c
index b18358d8b2..905beed9ff 100644
--- a/source3/lib/system.c
+++ b/source3/lib/system.c
@@ -612,7 +612,7 @@ int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf,
/*******************************************************************
An posix_fallocate() wrapper that will deal with 64 bit filesizes.
********************************************************************/
-#if defined(HAVE_POSIX_FALLOCATE64) || defined(HAVE_POSIX_FALLOCATE)
+#if (defined(HAVE_POSIX_FALLOCATE64) || defined(HAVE_POSIX_FALLOCATE)) && !defined(HAVE_BROKEN_POSIX_FALLOCATE)
int sys_posix_fallocate(int fd, SMB_OFF_T offset, SMB_OFF_T len)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_POSIX_FALLOCATE64)