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libthread: add threadmaybackground

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Programs that want to background themselves now need
to define threadmaybackground returning 1.
This avoids a confusing (to people and debuggers)
extra parent process for all the threaded programs
that will never want to background themselves.
This commit is contained in:
Russ Cox 2020-12-30 00:10:11 -05:00
parent 5b37d91264
commit b3a20a96eb
19 changed files with 120 additions and 21 deletions
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2
src/libthread/thread.c
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@ -844,7 +844,7 @@ main(int argc, char **argv)
// Easier to just run in pthread-per-thread mode.
pthreadperthread = 1;
#endif
if(strstr(opts, "nodaemon") == nil && getenv("NOLIBTHREADDAEMONIZE") == nil)
if(threadmaybackground() && strstr(opts, "nodaemon") == nil && getenv("NOLIBTHREADDAEMONIZE") == nil)
_threadsetupdaemonize();
threadargc = argc;