os-solaris/6211: Apache keep alive time outs not working

[Jason Greene <ja...@inetgurus.net>]

The following reply was made to PR os-solaris/6211; it has been noted by GNATS.

From: "Jason Greene" <ja...@inetgurus.net>
To: <ml...@home.com>, <Ma...@cs.com>
Cc: <ap...@Apache.Org>
Subject: os-solaris/6211: Apache keep alive time outs not working
Date: Fri, 10 Nov 2000 23:06:34 -0800

 I have reproduced your problem and have an explanation.
 I ran into the same situation when running apache with mod_casp2(chilisoft asp module)
 It appears that their module loads libpthread which translates all system calls into threaded calls.
 (Why they did this I have no idea)
 
 While Solaris does a good job at translating them correctly, sigsetjmp is NOT thread safe.
 Thus, all alarms should be reset.
 
 sigrelse will work correctly, but a better method is to use setprocmask, which solaris will translate to pthread_setprocmask.
 
 This quick and dirty patch, however, needs to be reworked for other UNIX's.:
 
 --- http_main.c.orig Thu Nov  9 20:33:20 2000
 +++ http_main.c Fri Nov 10 23:03:13 2000
 @@ -3849,7 +3849,8 @@
      struct sockaddr sa_server;
      struct sockaddr sa_client;
      listen_rec *lr;
 -
 +    sigset_t alarm_set;
 +
      /* All of initialization is a critical section, we don't care if we're
       * told to HUP or USR1 before we're done initializing.  For example,
       * we could be half way through child_init_modules() when a restart
 @@ -3919,6 +3920,8 @@
      signal(SIGURG, timeout);
  #endif
  #endif
 +    sigaddset(&alarm_set,SIGALRM);
 +    sigprocmask(SIG_UNBLOCK,&alarm_set,NULL);
      signal(SIGALRM, alrm_handler);
  #ifdef TPF
      signal(SIGHUP, just_die);
 
 If you need any more info let me know.