linux: Mark internal file descriptors as CLOEXEC
As a library, libusb should take care to be as friendly as possible
with various use cases. One such way is to ensure that internal file
descriptors have the CLOEXEC flag set, thus allowing processes to do
a fork() + exec() without leaking libusb's file descriptors to the
child process.
References #268
Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>
diff --git a/configure.ac b/configure.ac
index c0347b9..272deea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -223,7 +223,7 @@
AC_MSG_ERROR([timerfd header not available; glibc 2.9+ required])
fi
-AC_CHECK_DECL([TFD_NONBLOCK], [tfd_hdr_ok=yes], [tfd_hdr_ok=no], [#include <sys/timerfd.h>])
+AC_CHECK_DECLS([TFD_NONBLOCK, TFD_CLOEXEC], [tfd_hdr_ok=yes], [tfd_hdr_ok=no], [#include <sys/timerfd.h>])
if test "x$use_timerfd" = xyes -a "x$tfd_hdr_ok" = xno; then
AC_MSG_ERROR([timerfd header not usable; glibc 2.9+ required])
fi
@@ -240,6 +240,7 @@
fi
fi
+AC_CHECK_FUNCS([pipe2])
AC_CHECK_TYPES([struct timespec])
# Message logging