#define MACVLAN_MODE_PASSTHRU 8
#endif
-#define strprint(str, inlen, ...) \
- do { \
- len = snprintf(str, inlen, ##__VA_ARGS__); \
- if (len < 0) { \
- SYSERROR("failed to create string"); \
- return -1; \
- }; \
- fulllen += len; \
- if (inlen > 0) { \
- if (str) \
- str += len; \
- inlen -= len; \
- if (inlen < 0) \
- inlen = 0; \
- } \
+#define strprint(str, inlen, ...) \
+ do { \
+ if (str) \
+ len = snprintf(str, inlen, ##__VA_ARGS__); \
+ else \
+ len = snprintf((char *){""}, 0, ##__VA_ARGS__); \
+ if (len < 0) { \
+ SYSERROR("failed to create string"); \
+ return -1; \
+ }; \
+ fulllen += len; \
+ if (inlen > 0) { \
+ if (str) \
+ str += len; \
+ inlen -= len; \
+ if (inlen < 0) \
+ inlen = 0; \
+ } \
} while (0);
extern int parse_idmaps(const char *idmap, char *type, unsigned long *nsid,