diff options
| -rw-r--r-- | lib/PublicInbox/Syscall.pm | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/PublicInbox/Syscall.pm b/lib/PublicInbox/Syscall.pm index e972aa41..cc282f9f 100644 --- a/lib/PublicInbox/Syscall.pm +++ b/lib/PublicInbox/Syscall.pm @@ -418,6 +418,7 @@ sub CMSG_ALIGN ($) { ($_[0] + SIZEOF_size_t - 1) & ~(SIZEOF_size_t - 1) } use constant CMSG_ALIGN_SIZEOF_cmsghdr => CMSG_ALIGN(SIZEOF_cmsghdr); sub CMSG_SPACE ($) { CMSG_ALIGN($_[0]) + CMSG_ALIGN_SIZEOF_cmsghdr } sub CMSG_LEN ($) { CMSG_ALIGN_SIZEOF_cmsghdr + $_[0] } +use constant msg_controllen => CMSG_SPACE(10 * SIZEOF_int) + 16; # 10 FDs if (defined($SYS_sendmsg) && defined($SYS_recvmsg)) { no warnings 'once'; @@ -457,7 +458,7 @@ no warnings 'once'; *recv_cmd4 = sub ($$$) { my ($sock, undef, $len) = @_; vec($_[1], ($len + 1) * 8, 1) = 0; - vec(my $cmsghdr = '', 256 * 8 - 1, 1) = 1; + my $cmsghdr = "\0" x msg_controllen; # 10 * sizeof(int) my $iov = pack('P'.TMPL_size_t, $_[1], $len); my $mh = pack('PL' . # msg_name, msg_namelen (socklen_t (U32)) BYTES_4_hole . # 4-byte padding on 64-bit @@ -468,7 +469,7 @@ no warnings 'once'; @BYTES_4_hole, $iov, 1, # msg_iov, msg_iovlen $cmsghdr, # msg_control - 256, # msg_controllen + msg_controllen, 0); # msg_flags my $r = syscall($SYS_recvmsg, fileno($sock), $mh, 0); return (undef) if $r < 0; # $! set |