From 22a598fa626bf440127c1dd2a6b116514869752a Mon Sep 17 00:00:00 2001 From: Franck Bui Date: Tue, 25 Oct 2022 13:54:10 +0200 Subject: [PATCH] random-seed: clarify one comment (cherry picked from commit 46e0b5dca7fa5368bccbf30a7d2569d93d994a44) Related: RHEL-16952 --- src/random-seed/random-seed.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/random-seed/random-seed.c b/src/random-seed/random-seed.c index 7782509572..22ddf659ae 100644 --- a/src/random-seed/random-seed.c +++ b/src/random-seed/random-seed.c @@ -249,12 +249,13 @@ static int save_seed_file( if (!buf) return log_oom(); - /* Let's make this whole job asynchronous, i.e. let's make ourselves a barrier for proper - * initialization of the random pool. */ k = getrandom(buf, seed_size, GRND_NONBLOCK); if (k < 0 && errno == EAGAIN && synchronous) { + /* If we're asked to make ourselves a barrier for proper initialization of the random pool + * make this whole job synchronous by asking getrandom() to wait until the requested number + * of random bytes is available. */ log_notice("Kernel entropy pool is not initialized yet, waiting until it is."); - k = getrandom(buf, seed_size, 0); /* retry synchronously */ + k = getrandom(buf, seed_size, 0); } if (k < 0) log_debug_errno(errno, "Failed to read random data with getrandom(), falling back to /dev/urandom: %m");