return log_oom();
if (keep_capabilities) {
- cap_value_t bits[sizeof(keep_capabilities)*8];
+ cap_value_t bits[log2u64(keep_capabilities)];
- for (i = 0; i < sizeof(keep_capabilities)*8; i++)
+ for (i = 0; i < ELEMENTSOF(bits); i++)
if (keep_capabilities & (1ULL << i))
bits[j++] = i;
+ assert((keep_capabilities & (~1ULL << i)) == 0);
if (cap_set_flag(d, CAP_EFFECTIVE, j, bits, CAP_SET) < 0 ||
cap_set_flag(d, CAP_PERMITTED, j, bits, CAP_SET) < 0) {
#endif
}
-static inline int log2i(int x) {
+static inline unsigned log2i(int x) {
assert(x > 0);
return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
}
+static inline unsigned log2u64(uint64_t x) {
+ assert(x > 0);
+
+#if __SIZEOF_LONG_LONG__ == 8
+ return 64 - __builtin_clzll(x) - 1;
+#else
+#error "Wut?"
+#endif
+}
+
static inline unsigned log2u_round_up(unsigned x) {
assert(x > 0);