* Don't ignore SIGCHLD after all, Perl doesn't like it. Just do

Dependencies

• [2] YTESD75Z * Get rid of zombies.
• [3] JK2QWPH6
• [4] TULPZ62Y * Perform builds in parallel.
• [5] WHAFVCEI
• [6] AFTXA575 * $HYDRA_DATA environment variable.
• [7] T4LLYESZ * Nix expression for building Hydra.
• [8] 7YBYT2LQ
• [9] DQD7JMSU * Fix the terminology.
• [10] X27GNHDV * Basic job info in the database.
• [11] WM5WAST3 * Monitor for dead builds all the time.
• [*] N22GPKYT * Put info about logs / build products in the DB.

Change contents

• replacement in src/Hydra/script/hydra_queue_runner.pl at line 6
  [3.1114]→[3.244:264](∅→∅),[3.1564]→[3.244:264](∅→∅),[3.7850]→[3.244:264](∅→∅)
  − use POSIX qw(dup2);
  [3.1114]

  [3.187]
  + use POSIX qw(dup2 :sys_wait_h);
• replacement in src/Hydra/script/hydra_queue_runner.pl at line 17
  [2.1]→[2.1:24](∅→∅)
  − $SIG{CHLD} = 'IGNORE';
  [2.1]

  [3.7966]
  + #$SIG{CHLD} = 'IGNORE';
• replacement in src/Hydra/script/hydra_queue_runner.pl at line 27
  [3.225]→[3.302:375](∅→∅),[3.302]→[3.302:375](∅→∅)
  − if (kill(0, $pid) != 1) { # see if we can signal the process
  [3.225]

  [3.226]
  + my $unlock = 0;

  + if ($pid == $$) {

  + # Work around sqlite locking timeouts: if the child

  + # barfed because of a locked DB before updating the

  + # `locker' field, then `locker' is still set to $$.

  + # So if after 2 minutes it hasn't been updated,

  + # unlock the build. !!! need a better fix for those

  + # locking timeouts.

  + if ($build->schedulingInfo->starttime + 10 < time) {

  + $unlock = 1;

  + }

  + } elsif (kill(0, $pid) != 1) { # see if we can signal the process

  + $unlock = 1;

  + }

  + if ($unlock) {
• edit in src/Hydra/script/hydra_queue_runner.pl at line 139
  [3.867]

  [3.1597]
  + # Clean up zombies.

  + while ((waitpid(-1, &WNOHANG)) > 0) { };

  +
• edit in src/Hydra/script/hydra_queue_runner.pl at line 143
  [3.1623]

  [3.1623]
  +
• replacement in src/Hydra/script/hydra_scheduler.pl at line 428
  [3.1022]→[3.1022:1036](∅→∅)
  − sleep 10;
  [3.1022]

  [3.1036]
  + sleep 30;