101010.pl

JdeBPIt seems like only 2 days ago this manual page section was only 2 sentences long. (-:<a href="https://jdebp.uk/Softwares/nosh/guide/commands/setlock.xml" rel="nofollow noopener" target="_blank">https://jdebp.uk/Softwares/nosh/guide/commands/setlock.xml</a><a href="https://tty0.social/tags/NFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NFS</a> <a href="https://tty0.social/tags/setlock" class="mention hashtag" rel="nofollow noopener" target="_blank">#setlock</a> <a href="https://tty0.social/tags/flock" class="mention hashtag" rel="nofollow noopener" target="_blank">#flock</a> <a href="https://tty0.social/tags/lockf" class="mention hashtag" rel="nofollow noopener" target="_blank">#lockf</a> <a href="https://tty0.social/tags/s6" class="mention hashtag" rel="nofollow noopener" target="_blank">#s6</a> <a href="https://tty0.social/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#FreeBSD</a> <a href="https://tty0.social/tags/Illumos" class="mention hashtag" rel="nofollow noopener" target="_blank">#Illumos</a> <a href="https://tty0.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> <a href="https://mstdn.social/@josephholsten" class="u-url mention" rel="nofollow noopener" target="_blank">@josephholsten</a> <a href="https://mastodon.social/@cks" class="u-url mention" rel="nofollow noopener" target="_blank">@cks</a> <a href="https://social.treehouse.systems/@ska" class="u-url mention" rel="nofollow noopener" target="_blank">@ska</a> <a href="https://toot.io/@synlogic" class="u-url mention" rel="nofollow noopener" target="_blank">@synlogic</a>

JdeBP<a href="https://mstdn.social/@josephholsten" class="u-url mention" rel="nofollow noopener" target="_blank">@josephholsten</a>Resources:<a href="https://tty0.social/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#FreeBSD</a> and <a href="https://tty0.social/tags/Illumos" class="mention hashtag" rel="nofollow noopener" target="_blank">#Illumos</a> guarantees: <a href="https://illumos.org/man/2/fcntl#file-locking" rel="nofollow noopener" target="_blank">https://illumos.org/man/2/fcntl#file-locking</a> and <a href="https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2#NOTES" rel="nofollow noopener" target="_blank">https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2#NOTES</a> HPA's use of flock(2): <a href="https://salsa.debian.org/debian/util-linux/-/blob/master/sys-utils/flock.c#L281" rel="nofollow noopener" target="_blank">https://salsa.debian.org/debian/util-linux/-/blob/master/sys-utils/flock.c#L281</a>FreeBSD using O_EXLOCK: <a href="https://github.com/freebsd/freebsd-src/blob/0e04dd3b66c053422b90c387f7bbd82a0921bda0/usr.bin/lockf/lockf.c#L177" rel="nofollow noopener" target="_blank">https://github.com/freebsd/freebsd-src/blob/0e04dd3b66c053422b90c387f7bbd82a0921bda0/usr.bin/lockf/lockf.c#L177</a>Bernstein's approach, unified for redo: <a href="https://github.com/jdebp/djbwares/blob/master/source/lock_ex.c" rel="nofollow noopener" target="_blank">https://github.com/jdebp/djbwares/blob/master/source/lock_ex.c</a> <a href="https://github.com/jdebp/djbwares/blob/master/source/hasflock.h.do" rel="nofollow noopener" target="_blank">https://github.com/jdebp/djbwares/blob/master/source/hasflock.h.do</a>I went with detecting O_EXLOCK: <a href="https://github.com/jdebp/nosh/blob/master/source/open_lockfile.cpp" rel="nofollow noopener" target="_blank">https://github.com/jdebp/nosh/blob/master/source/open_lockfile.cpp</a><a href="https://mastodon.social/@cks" class="u-url mention" rel="nofollow noopener" target="_blank">@cks</a> points to the <a href="https://tty0.social/tags/fcntl" class="mention hashtag" rel="nofollow noopener" target="_blank">#fcntl</a>, <a href="https://tty0.social/tags/lockf" class="mention hashtag" rel="nofollow noopener" target="_blank">#lockf</a>, and <a href="https://tty0.social/tags/flock" class="mention hashtag" rel="nofollow noopener" target="_blank">#flock</a> Linux man pages at <a href="https://utcc.utoronto.ca/~cks/space/blog/linux/FlockFcntlAndNFS" rel="nofollow noopener" target="_blank">https://utcc.utoronto.ca/~cks/space/blog/linux/FlockFcntlAndNFS</a><a href="https://tty0.social/tags/NFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NFS</a> <a href="https://tty0.social/tags/setlock" class="mention hashtag" rel="nofollow noopener" target="_blank">#setlock</a> <a href="https://tty0.social/tags/s6" class="mention hashtag" rel="nofollow noopener" target="_blank">#s6</a> <a href="https://social.treehouse.systems/@ska" class="u-url mention" rel="nofollow noopener" target="_blank">@ska</a> <a href="https://toot.io/@synlogic" class="u-url mention" rel="nofollow noopener" target="_blank">@synlogic</a>

JdeBP<a href="https://mstdn.social/@josephholsten" class="u-url mention" rel="nofollow noopener" target="_blank">@josephholsten</a> The interoperability problems are significant. H. Peter Anvin's flock(1) uses flock(2), whereas you are using fcntl(2).Ironically, this means that <a href="https://tty0.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> is your worst nightmare, because <a href="https://tty0.social/tags/Illumos" class="mention hashtag" rel="nofollow noopener" target="_blank">#Illumos</a> and the BSDs guarantee that those two will (locally) interlock, whereas Linux doesn't and the world has thus got two <a href="https://tty0.social/tags/flock" class="mention hashtag" rel="nofollow noopener" target="_blank">#flock</a> tools on Linux that don't interlock.That's going to be a <a href="https://tty0.social/tags/Unix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Unix</a> StackExchange answer somewhen.<a href="https://tty0.social/tags/NFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NFS</a> <a href="https://tty0.social/tags/setlock" class="mention hashtag" rel="nofollow noopener" target="_blank">#setlock</a> <a href="https://tty0.social/tags/fcntl" class="mention hashtag" rel="nofollow noopener" target="_blank">#fcntl</a> <a href="https://tty0.social/tags/lockf" class="mention hashtag" rel="nofollow noopener" target="_blank">#lockf</a> <a href="https://tty0.social/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#FreeBSD</a> <a href="https://tty0.social/tags/s6" class="mention hashtag" rel="nofollow noopener" target="_blank">#s6</a> <a href="https://social.treehouse.systems/@ska" class="u-url mention" rel="nofollow noopener" target="_blank">@ska</a> <a href="https://toot.io/@synlogic" class="u-url mention" rel="nofollow noopener" target="_blank">@synlogic</a> <a href="https://mastodon.social/@cks" class="u-url mention" rel="nofollow noopener" target="_blank">@cks</a>

JdeBP<a href="https://mstdn.social/@josephholsten" class="u-url mention" rel="nofollow noopener" target="_blank">@josephholsten</a> Interesting. Another one. At this rate I'm going to have to factor out a list so that I don't keep laboriously repeating the names.It's worth your having a HISTORY section on your manual page. Speaking from experience of _reading_ HISTORY sections, 20 years from now, people will quietly thank you.I've tried to do that myself. e.g. <a href="http://jdebp.info/Softwares/djbwares/guide/commands/easter.xml#History" rel="nofollow noopener" target="_blank">http://jdebp.info/Softwares/djbwares/guide/commands/easter.xml#History</a><a href="https://tty0.social/tags/NFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NFS</a> <a href="https://tty0.social/tags/setlock" class="mention hashtag" rel="nofollow noopener" target="_blank">#setlock</a> <a href="https://tty0.social/tags/flock" class="mention hashtag" rel="nofollow noopener" target="_blank">#flock</a> <a href="https://tty0.social/tags/lockf" class="mention hashtag" rel="nofollow noopener" target="_blank">#lockf</a> <a href="https://tty0.social/tags/Illumos" class="mention hashtag" rel="nofollow noopener" target="_blank">#Illumos</a> <a href="https://tty0.social/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#FreeBSD</a> <a href="https://tty0.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> <a href="https://tty0.social/tags/s6" class="mention hashtag" rel="nofollow noopener" target="_blank">#s6</a> <a href="https://social.treehouse.systems/@ska" class="u-url mention" rel="nofollow noopener" target="_blank">@ska</a> <a href="https://toot.io/@synlogic" class="u-url mention" rel="nofollow noopener" target="_blank">@synlogic</a> <a href="https://mastodon.social/@cks" class="u-url mention" rel="nofollow noopener" target="_blank">@cks</a>

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