Re: `message' not outputting the newline "atomically"

[Paul Eggert]

Eli Zaretskii wrote:
> Can't we also fix that by replacing the above with 'sprintf' followed
> by 'write'?

Not easily. Using a fixed-size buffer and truncating the output would violate 
the GNU coding standards; using a PIPE_BUF-size buffer and looping until the 
output was done would be quite difficult to do with sprintf; and allocating the 
buffer on the heap would result in the usual buffer-management hassles such as 
potential leaks and dealing with allocation failures. In short, none of these 
alternatives are nearly as simple and reliable as line-buffered stderr. Even 
fully-buffered stderr (not a solution I favor) would be simpler and more 
reliable than trying to buffer stderr via sprintf+write.