char buffer[16];
int r;
buffer[0] = 1;
- write(c, buffer, 1);
- write(c, "00000000000000", 14);
+ r = write(c, buffer, 1);
+ if (r < 1)
+ return -1;
+ r = write(c, "00000000000000", 14);
+ if (r < 14)
+ return -1;
r = read(c, buffer, 1);
if (r != 1 && buffer[0] != 'E')
return -1;