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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Bryan Steele‏ @canadianbryan 6 Oct 2016

      Bryan Steele Retweeted OpenBSD src Changes

      Including the work done on OpenSSH 12 years ago, that makes this the 11th daemon to receive the fork+exec treatment:https://twitter.com/OpenBSD_src/status/784022195194372097 …

      Bryan Steele added,

      OpenBSD src Changes @OpenBSD_src
      bluhm@ modified usr.sbin/syslogd: Do an exec on itself in the privileged syslogd(8) parent process to reshuffle its memory layout. Input...
      1 reply 6 retweets 7 likes
    2. Rich Felker‏ @RichFelker 6 Oct 2016
      Replying to @canadianbryan

      Are they using fork+exec or posix_spawn? It would be really nice to do the latter - better performance, nommu compat.

      1 reply 0 retweets 0 likes
    3. Bryan Steele‏ @canadianbryan 6 Oct 2016
      Replying to @RichFelker

      fork+exec, there's no uses of posix_spawn in base.

      1 reply 0 retweets 0 likes
    4. Bryan Steele‏ @canadianbryan 6 Oct 2016
      Replying to @canadianbryan @RichFelker

      At least with OpenBSD, posix_spawn(3) is implemented using execv/execvpe

      1 reply 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 6 Oct 2016
      Replying to @canadianbryan

      Yes, but the new-process part can be implemented with something vfork-like rather than fork. That's where the savings lie.

      1 reply 0 retweets 0 likes
    6. Bryan Steele‏ @canadianbryan 6 Oct 2016
      Replying to @RichFelker

      Yes, OpenBSD just uses fork here. There's some rational for that in the initial diff proposal: http://marc.info/?l=openbsd-tech&m=133228540028362&w=2 …

      2 replies 0 retweets 0 likes
      Rich Felker‏ @RichFelker 6 Oct 2016
      Replying to @canadianbryan

      Well it would still be nice for porting to other systems, but I see how it wouldn't help on their own.

      8:13 AM - 6 Oct 2016
      0 replies 0 retweets 0 likes

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