- void *ret = mmap(NULL, length, prot, flags, fd, offset);
- if (ret != MAP_FAILED)
- return ret;
- PARA_EMERG_LOG("mmap failed: %s\n", strerror(errno));
- PARA_EMERG_LOG("length: %zu, flags: %d, fd: %d, offset: %zu\n",
- length, flags, fd, (size_t)offset);
- exit(EXIT_FAILURE);
+ void **m = map;
+
+ errno = EINVAL;
+ if (!length)
+ goto err;
+ *m = mmap(NULL, length, prot, flags, fd, offset);
+ if (*m != MAP_FAILED)
+ return 1;
+err:
+ *m = NULL;
+ return -ERRNO_TO_PARA_ERROR(errno);