+struct memblock {
+ void *buffer;
+ size_t size;
+};
+
+static int readfile(const char *filename, struct memblock *mem)
+{
+ int ret, fd = open(filename, O_RDONLY);
+ struct stat st;
+
+ mem->buffer = NULL;
+ mem->size = 0;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return fd;
+ ret = fstat(fd, &st);
+ if (ret < 0)
+ goto out;
+ ret = -EINVAL;
+ if (!S_ISREG(st.st_mode))
+ goto out;
+ ret = 0;
+ if (!st.st_size)
+ goto out;
+ mem->buffer = malloc(st.st_size);
+ ret = -1;
+ errno = ENOMEM;
+ if (!mem->buffer)
+ goto out;
+ mem->size = st.st_size;
+ ret = read(fd, mem->buffer, mem->size);
+ if (ret < 0)
+ goto free;
+ if (ret == mem->size)
+ goto out;
+ errno = EIO;
+ ret = -1;
+free:
+ free(mem->buffer);
+ mem->buffer = NULL;
+ mem->size = 0;
+out:
+ close(fd);
+ return ret;
+}
+