diff options
-rw-r--r-- | lib/PublicInbox/Syscall.pm | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/lib/PublicInbox/Syscall.pm b/lib/PublicInbox/Syscall.pm index cc282f9f..22b779ad 100644 --- a/lib/PublicInbox/Syscall.pm +++ b/lib/PublicInbox/Syscall.pm @@ -390,12 +390,10 @@ sub rename_noreplace ($$) { } } -sub nodatacow_fh { - return if !defined($SYS_fstatfs); - my $buf = ''; - vec($buf, 120 * 8 - 1, 1) = 0; +sub nodatacow_fh ($) { my ($fh) = @_; - syscall($SYS_fstatfs, fileno($fh), $buf) == 0 or + my $buf = "\0" x 120; + syscall($SYS_fstatfs // return, fileno($fh), $buf) == 0 or return warn("fstatfs: $!\n"); my $f_type = unpack('l!', $buf); # statfs.f_type is a signed word return if $f_type != 0x9123683E; # BTRFS_SUPER_MAGIC |