privsep: adjust comment for prior

Note that this is a requirement for printf over serial terminals.

diff --git a/src/privsep-linux.c b/src/privsep-linux.c
index 306eb2498993d65fb6a471fdb5aa30fea236aa98..e588ecd7d6b2180b84a5443991a0635b3344a5ac 100644 (file)
--- a/src/privsep-linux.c
+++ b/src/privsep-linux.c
@@ -257,7 +257,7 @@ static struct sock_filter ps_seccomp_filter[] = {
        SECCOMP_ALLOW_ARG(__NR_ioctl, 1, SIOCGIFINDEX),
        SECCOMP_ALLOW_ARG(__NR_ioctl, 1, SIOCGIFMTU),
        SECCOMP_ALLOW_ARG(__NR_ioctl, 1, SIOCGIFVLAN),
-       /* printf on some platforms seems to use this ioctl */
+       /* printf over serial terminal requires this */
        SECCOMP_ALLOW_ARG(__NR_ioctl, 1, TCGETS),
        /* SECCOMP BPF is newer than nl80211 so we don't need SIOCGIWESSID
         * which lives in the impossible to include linux/wireless.h header */