diff -r 158b41842fd2 -r d9d8d78e6bc9 mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Wed Aug 17 20:41:05 2016 -0700
+++ b/mercurial/cmdutil.py	Sat Oct 15 13:47:43 2016 +0900
@@ -10,7 +10,6 @@
 import errno
 import os
 import re
-import sys
 import tempfile
 
 from .i18n import _
@@ -821,93 +820,6 @@
 
     return errors != 0
 
-def service(opts, parentfn=None, initfn=None, runfn=None, logfile=None,
-    runargs=None, appendpid=False):
-    '''Run a command as a service.'''
-
-    def writepid(pid):
-        if opts['pid_file']:
-            if appendpid:
-                mode = 'a'
-            else:
-                mode = 'w'
-            fp = open(opts['pid_file'], mode)
-            fp.write(str(pid) + '\n')
-            fp.close()
-
-    if opts['daemon'] and not opts['daemon_postexec']:
-        # Signal child process startup with file removal
-        lockfd, lockpath = tempfile.mkstemp(prefix='hg-service-')
-        os.close(lockfd)
-        try:
-            if not runargs:
-                runargs = util.hgcmd() + sys.argv[1:]
-            runargs.append('--daemon-postexec=unlink:%s' % lockpath)
-            # Don't pass --cwd to the child process, because we've already
-            # changed directory.
-            for i in xrange(1, len(runargs)):
-                if runargs[i].startswith('--cwd='):
-                    del runargs[i]
-                    break
-                elif runargs[i].startswith('--cwd'):
-                    del runargs[i:i + 2]
-                    break
-            def condfn():
-                return not os.path.exists(lockpath)
-            pid = util.rundetached(runargs, condfn)
-            if pid < 0:
-                raise error.Abort(_('child process failed to start'))
-            writepid(pid)
-        finally:
-            try:
-                os.unlink(lockpath)
-            except OSError as e:
-                if e.errno != errno.ENOENT:
-                    raise
-        if parentfn:
-            return parentfn(pid)
-        else:
-            return
-
-    if initfn:
-        initfn()
-
-    if not opts['daemon']:
-        writepid(util.getpid())
-
-    if opts['daemon_postexec']:
-        try:
-            os.setsid()
-        except AttributeError:
-            pass
-        for inst in opts['daemon_postexec']:
-            if inst.startswith('unlink:'):
-                lockpath = inst[7:]
-                os.unlink(lockpath)
-            elif inst.startswith('chdir:'):
-                os.chdir(inst[6:])
-            elif inst != 'none':
-                raise error.Abort(_('invalid value for --daemon-postexec: %s')
-                                  % inst)
-        util.hidewindow()
-        util.stdout.flush()
-        util.stderr.flush()
-
-        nullfd = os.open(os.devnull, os.O_RDWR)
-        logfilefd = nullfd
-        if logfile:
-            logfilefd = os.open(logfile, os.O_RDWR | os.O_CREAT | os.O_APPEND)
-        os.dup2(nullfd, 0)
-        os.dup2(logfilefd, 1)
-        os.dup2(logfilefd, 2)
-        if nullfd not in (0, 1, 2):
-            os.close(nullfd)
-        if logfile and logfilefd not in (0, 1, 2):
-            os.close(logfilefd)
-
-    if runfn:
-        return runfn()
-
 ## facility to let extension process additional data into an import patch
 # list of identifier to be executed in order
 extrapreimport = []  # run before commit