os.urandom() doesn't block on Linux anymore

Issue #26839: On Linux, os.urandom() now calls getrandom() with GRND_NONBLOCK
to fall back on reading /dev/urandom if the urandom entropy pool is not
initialized yet. Patch written by Colm Buckley.

1 files changed, 5 insertions, 3 deletions

diff --git a/configure b/configure
index 3216ad7..c892a99 100755
--- a/configure
+++ b/configure
@@ -2876,6 +2876,7 @@ fi
 ac_config_headers="$ac_config_headers pyconfig.h"
 
 
+
 ac_aux_dir=
 for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
   if test -f "$ac_dir/install-sh"; then
@@ -7568,7 +7569,7 @@ sys/param.h sys/select.h sys/sendfile.h sys/socket.h sys/statvfs.h \
 sys/stat.h sys/syscall.h sys/sys_domain.h sys/termio.h sys/time.h \
 sys/times.h sys/types.h sys/uio.h sys/un.h sys/utsname.h sys/wait.h pty.h \
 libutil.h sys/resource.h netpacket/packet.h sysexits.h bluetooth.h \
-bluetooth/bluetooth.h linux/tipc.h spawn.h util.h alloca.h endian.h \
+bluetooth/bluetooth.h linux/tipc.h linux/random.h spawn.h util.h alloca.h endian.h \
 sys/endian.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
@@ -16325,12 +16326,13 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
     #include <unistd.h>
     #include <sys/syscall.h>
+    #include <linux/random.h>
 
     int main() {
         char buffer[1];
         const size_t buflen = sizeof(buffer);
-        const int flags = 0;
-        /* ignore the result, Python checks for ENOSYS at runtime */
+        const int flags = GRND_NONBLOCK;
+        /* ignore the result, Python checks for ENOSYS and EAGAIN at runtime */
         (void)syscall(SYS_getrandom, buffer, buflen, flags);
         return 0;
     }