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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, dirk+bash@testssl.sh 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 chet@case.edu http://tiswww.cwru.edu/~chet/
- Re: bash sockets: printf \x0a does TCP fragmentation, (continued)
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/22
- Re: bash sockets: printf \x0a does TCP fragmentation, dirk+bash, 2018/09/22
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/22
- Re: bash sockets: printf \x0a does TCP fragmentation, Chet Ramey, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Chet Ramey, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, dirk+bash, 2018/09/25
- Re: bash sockets: printf \x0a does TCP fragmentation,
Chet Ramey <=
- Re: bash sockets: printf \x0a does TCP fragmentation, Greg Wooledge, 2018/09/25
- Re: bash sockets: printf \x0a does TCP fragmentation, dirk+bash, 2018/09/25
- Re: bash sockets: printf \x0a does TCP fragmentation, Robert Elz, 2018/09/22
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Robert Elz, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Bob Proulx, 2018/09/23
- Re: bash sockets: printf \x0a does TCP fragmentation, Greg Wooledge, 2018/09/24
- Re: bash sockets: printf \x0a does TCP fragmentation, L A Walsh, 2018/09/25
- Re: bash sockets: printf \x0a does TCP fragmentation, Greg Wooledge, 2018/09/25
- Re: bash sockets: printf \x0a does TCP fragmentation, Chet Ramey, 2018/09/25