bug-bash
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: bash sockets: printf \x0a does TCP fragmentation


From: Chet Ramey
Subject: Re: bash sockets: printf \x0a does TCP fragmentation
Date: Tue, 25 Sep 2018 09:46:55 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 9/25/18 9:04 AM, address@hidden wrote:

> FYI: I ended up checking with type before whether an external printf
> exists and set a variable for this and then just call this variable.
> 
> env or exec: never thought about it (thanks!) but as both are external
> commands, that would mean upon every call one additional external program.
> (yes, I know that there is such thing as a fs buffer). Subshells also costs
> resources. As this is a core function I am happy for every homeopathic dose
> of time I safe here :-)

`exec' is a shell builtin. It will `cost' in terms of a fork, but you're
going to fork and exec a different program anyway -- /usr/bin/printf --
so it's basically a wash. In either case, there's one fork and one
execve.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



reply via email to

[Prev in Thread] Current Thread [Next in Thread]