Do not get 'generation' using ioctl when evm_portable is true

If a signatures is detected as being portable do not attempt to read the generation with the ioctl since in some cases this may not be supported by the filesystem and is also not needed for computing a portable signature.

This avoids the current work-around of passing --generation 0 when the ioctl is not supported by the filesystem.

---
 src/evmctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 6d2bb67..c35a28c 100644
@@ -376,7 +376,7 @@ static int calc_evm_hash(const char *file, unsigned char *hash)
 	if (mode_str)
 		st.st_mode = strtoul(mode_str, NULL, 10);
 
-	if (!evm_immutable) {
+	if (!evm_immutable && !evm_portable) {
 		if (S_ISREG(st.st_mode) && !generation_str) {
 			int fd = open(file, 0);
 

2.39.2