Mercurial > hg
view mercurial/server.py @ 30867:aaa751585325
pager: don't terminate with extreme prejudice on SIGPIPE (BC)
The default SIGPIPE handler causes Mercurial to exit immediately, without
running any Python cleanup code (except and finally blocks, atexit handlers
etc). This creates problems if you want to do something at exit.
If we need a different exit code for broken pipe from pager, then we should
code that ourselves in Python; this appears to have been cargo-culted from
the fork implementation of pager that's no longer used, where it was needed
to stop Broken Pipe errors appearing on the user's terminal.
author | Simon Farnsworth <simonfar@fb.com> |
---|---|
date | Thu, 02 Feb 2017 11:17:36 -0800 |
parents | ff7df4bb75de |
children | ce4ddcda868b |
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# server.py - utility and factory of server # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import errno import os import sys import tempfile from .i18n import _ from . import ( chgserver, commandserver, error, hgweb, util, ) def runservice(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() _cmdservicemap = { 'chgunix': chgserver.chgunixservice, 'pipe': commandserver.pipeservice, 'unix': commandserver.unixforkingservice, } def _createcmdservice(ui, repo, opts): mode = opts['cmdserver'] try: return _cmdservicemap[mode](ui, repo, opts) except KeyError: raise error.Abort(_('unknown mode %s') % mode) def _createhgwebservice(ui, repo, opts): # this way we can check if something was given in the command-line if opts.get('port'): opts['port'] = util.getport(opts.get('port')) alluis = set([ui]) if repo: baseui = repo.baseui alluis.update([repo.baseui, repo.ui]) else: baseui = ui webconf = opts.get('web_conf') or opts.get('webdir_conf') if webconf: # load server settings (e.g. web.port) to "copied" ui, which allows # hgwebdir to reload webconf cleanly servui = ui.copy() servui.readconfig(webconf, sections=['web']) alluis.add(servui) else: servui = ui optlist = ("name templates style address port prefix ipv6" " accesslog errorlog certificate encoding") for o in optlist.split(): val = opts.get(o, '') if val in (None, ''): # should check against default options instead continue for u in alluis: u.setconfig("web", o, val, 'serve') app = hgweb.createapp(baseui, repo, webconf) return hgweb.httpservice(servui, app, opts) def createservice(ui, repo, opts): if opts["cmdserver"]: return _createcmdservice(ui, repo, opts) else: return _createhgwebservice(ui, repo, opts)