135 lines
4.3 KiB
Python
135 lines
4.3 KiB
Python
"""
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Copyright 2017 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import configparser
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import errno
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import logging
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import os
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import pmb.chroot
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import pmb.config
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import pmb.chroot.apk
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def get_running_pid(args):
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"""
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:returns: the running distccd's pid as integer or None
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"""
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pidfile = args.work + "/chroot_native/home/user/distccd.pid"
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if not os.path.exists(pidfile):
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return None
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with open(pidfile, "r") as handle:
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lines = handle.readlines()
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return int(lines[0][:-1])
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def get_running_info(args):
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"""
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:returns: A dictionary in the form of {"arch": .., "cmdline": "" }. arch is
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the architecture (e.g. "armhf" or "aarch64"), and "cmdline" is the
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saved value from the generate_cmdline() list, joined on space.
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If the information can not be read, "arch" and "cmdline" are set to
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"unknown".
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The arch is used to print a nice stop message, the full cmdline is used to
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check whether distccd needs to be restartet (e.g. because the arch has been
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changed, or the verbose flag).
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"""
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info = configparser.ConfigParser()
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path = args.work + "/chroot_native/tmp/distccd_running_info"
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if os.path.exists(path):
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info.read(path)
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else:
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info["distccd"] = {}
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info["distccd"]["arch"] = "unknown"
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info["distccd"]["cmdline"] = "unknown"
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return info["distccd"]
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def is_running(args):
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"""
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:returns: When not running: None
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When running: result from get_running_info()
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"""
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# Get the PID
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pid = get_running_pid(args)
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if not pid:
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return False
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# Verify, if it still exists by sending a kill signal
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try:
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os.kill(pid, 0)
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except OSError as err:
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if err.errno == errno.ESRCH: # no such process
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pmb.chroot.root(args, ["rm", "/home/user/distccd.pid"])
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return False
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elif err.errno == errno.EPERM: # access denied
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return get_running_info(args)
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def generate_cmdline(args, arch):
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"""
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:returns: a dictionary suitable for pmb.chroot.user(), to start the distccd
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with the cross-compiler in the path and all options set.
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"""
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path = "/usr/lib/gcc-cross-wrappers/" + arch + "/bin:" + pmb.config.chroot_path
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ret = ["PATH=" + path,
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"distccd",
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"--pid-file", "/home/user/distccd.pid",
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"--listen", "127.0.0.1",
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"--allow", "127.0.0.1",
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"--port", args.port_distccd,
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"--log-file", "/home/user/distccd.log",
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"--jobs", args.jobs,
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"--nice", "19",
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"--job-lifetime", "60",
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"--daemon"
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]
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if args.verbose:
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ret.append("--verbose")
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return ret
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def start(args, arch):
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# Skip when already running with the same cmdline
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cmdline = generate_cmdline(args, arch)
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info = is_running(args)
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if info and info["cmdline"] == " ".join(cmdline):
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return
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stop(args)
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pmb.chroot.apk.install(args, ["distcc", "gcc-cross-wrappers"])
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# Start daemon with cross-compiler in path
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logging.info("(native) start distccd (" + arch + ") on 127.0.0.1:" +
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args.port_distccd)
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pmb.chroot.user(args, cmdline)
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# Write down the arch and cmdline (which also contains the relevant
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# environment variables, /proc/$pid/cmdline does not!)
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info = configparser.ConfigParser()
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info["distccd"] = {}
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info["distccd"]["arch"] = arch
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info["distccd"]["cmdline"] = " ".join(cmdline)
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with open(args.work + "/chroot_native/tmp/distccd_running_info", "w") as handle:
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info.write(handle)
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def stop(args):
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info = is_running(args)
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if info:
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logging.info("(native) stop distccd (" + info["arch"] + ")")
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pmb.chroot.user(args, ["kill", str(get_running_pid(args))])
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