commit 8f465808a06c739d8f81d04f6ed07fad40cacc76 Author: teor teor2345@gmail.com Date: Thu Nov 3 08:44:57 2016 +1100

Check for getpagesize before using it to mmap files

This fixes compilation in some MinGW environments.

Fixes bug 20530; bugfix on commit bf72878 in tor-0.1.2.1-alpha. Reported by "ice". --- changes/bug20530 | 4 ++++ configure.ac | 8 ++++++++ src/common/compat.c | 10 +++++++++- 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/changes/bug20530 b/changes/bug20530 new file mode 100644 index 0000000..c21d5fb --- /dev/null +++ b/changes/bug20530 @@ -0,0 +1,4 @@ + o Minor Fixes (Windows): + - Check for getpagesize before using it to mmap files. This fixes + compilation in some MinGW environments. Fixes bug 20530; bugfix on + commit bf72878 in tor-0.1.2.1-alpha, reported by "ice". diff --git a/configure.ac b/configure.ac index d35f83c..2a85794 100644 --- a/configure.ac +++ b/configure.ac @@ -1410,6 +1410,14 @@ AC_CHECK_DECLS([mlockall], , , [ #include <sys/mman.h> #endif])

+# Some MinGW environments don't have getpagesize in unistd.h. We don't use +# AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize +# using macros +AC_CHECK_DECLS([getpagesize], , , [ +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif]) + # Allow user to specify an alternate syslog facility AC_ARG_WITH(syslog-facility, AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]), diff --git a/src/common/compat.c b/src/common/compat.c index 4f2f977..5d751f8 100644 --- a/src/common/compat.c +++ b/src/common/compat.c @@ -204,7 +204,15 @@ tor_rename(const char *path_old, const char *path_new) sandbox_intern_string(path_new)); }

-#if defined(HAVE_SYS_MMAN_H) || defined(RUNNING_DOXYGEN) +/* Some MinGW builds have sys/mman.h, but not the corresponding symbols. + * Other configs rename the symbols using macros (including getpagesize). + * So check for sys/mman.h and unistd.h, and a getpagesize declaration. */ +#if (defined(HAVE_SYS_MMAN_H) && defined(HAVE_UNISTD_H) && \ + defined(HAVE_DECL_GETPAGESIZE)) +#define COMPAT_HAS_MMAN_AND_PAGESIZE +#endif + +#if defined(COMPAT_HAS_MMAN_AND_PAGESIZE) || defined(RUNNING_DOXYGEN) /** Try to create a memory mapping for <b>filename</b> and return it. On * failure, return NULL. Sets errno properly, using ERANGE to mean * "empty file". */