hardcoresushi/libgocryptfs
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Fix "constant 2435016766 overflows int32" build failure on arm

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Cast to uint32 to fix the int32 overflow, and define BTRFS_SUPER_MAGIC
locally to fix the next failure on darwin.
This commit is contained in:
Jakob Unterwurzacher 2019-08-04 19:43:07 +02:00
parent b1d09b0f17
commit f1b538ef24
1 changed files with 4 additions and 1 deletions
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5
mount.go
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@ -100,9 +100,12 @@ func doMount(args *argContainer) {
// Preallocation on Btrfs is broken ( https://github.com/rfjakob/gocryptfs/issues/395 )
// and slow ( https://github.com/rfjakob/gocryptfs/issues/63 ).
if !args.noprealloc {
// darwin does not have unix.BTRFS_SUPER_MAGIC, so we define it here
const BTRFS_SUPER_MAGIC = 0x9123683e
var st unix.Statfs_t
err = unix.Statfs(args.cipherdir, &st)
if err == nil && st.Type == unix.BTRFS_SUPER_MAGIC {
// Cast to uint32 avoids compile error on arm: "constant 2435016766 overflows int32"
if err == nil && uint32(st.Type) == BTRFS_SUPER_MAGIC {
tlog.Info.Printf(tlog.ColorYellow +
"Btrfs detected, forcing -noprealloc. See https://github.com/rfjakob/gocryptfs/issues/395 for why." +
tlog.ColorReset)