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Code Issues Releases Wiki Activity

Correctly reap child processes that are adopted during invocation of init scripts.

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This commit is contained in:
Hongli Lai (Phusion) 2014-02-13 15:36:01 +01:00
parent 67c6b089e3
commit c22f8804ad
2 changed files with 18 additions and 11 deletions
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4
Changelog.md
View File

@ -1,3 +1,7 @@
## 0.9.6
* Fixed a bug in `my_init`: child processes that have been adopted during execution of init scripts are now properly reaped.
## 0.9.5 (release date: 2014-02-06)
* Environment variables are now no longer reset by runit. This is achieved by running `runsvdir` directly instead of through Debian's `runsvdir-start`.

25
image/my_init
View File

@ -29,8 +29,7 @@ def reap_child(signum, frame):
except OSError:
pass
def stop_child_process(name):
global pid
def stop_child_process(name, pid):
print("*** Shutting down %s (PID %d)..." % (name, pid))
try:
os.kill(pid, signal.SIGHUP)
@ -41,15 +40,19 @@ def run_command_killable(*argv):
global pid
filename = argv[0]
pid = os.spawnvp(os.P_NOWAIT, filename, argv)
signal.signal(signal.SIGINT, lambda signum, frame: stop_child_process(filename))
signal.signal(signal.SIGTERM, lambda signum, frame: stop_child_process(filename))
signal.signal(signal.SIGINT, lambda signum, frame: stop_child_process(filename, pid))
signal.signal(signal.SIGTERM, lambda signum, frame: stop_child_process(filename, pid))
try:
this_pid, status = os.waitpid(pid, 0)
except OSError as e:
if e.errno == errno.EINTR:
sys.exit(2)
else:
raise
done = False
while not done:
try:
this_pid, status = os.waitpid(-1, 0)
done = this_pid == pid
except OSError as e:
if e.errno == errno.EINTR:
sys.exit(2)
else:
raise
finally:
signal.signal(signal.SIGINT, signal.SIG_DFL)
signal.signal(signal.SIGTERM, signal.SIG_DFL)
@ -74,7 +77,7 @@ signal.signal(signal.SIGCHLD, reap_child)
print("*** Booting runit...")
pid = os.spawnl(os.P_NOWAIT, "/usr/bin/runsvdir", "/usr/bin/runsvdir", "-P", "/etc/service", "log: %s" % ('.' * 395))
print("*** Runit started as PID %d" % pid)
signal.signal(signal.SIGTERM, lambda signum, frame: stop_child_process("runit"))
signal.signal(signal.SIGTERM, lambda signum, frame: stop_child_process("runit", pid))
# Wait for runit, and while waiting, reap any adopted orphans.
done = False