forked from Mirror/pmbootstrap
f21c216a26
While at it, also remove unnecessary "#!/usr/bin/env python3" in files that only get imported, and adjust other empty/comment lines in the beginnings of the files for consistency. This makes files easier to read, and makes the pmbootstrap codebase more consistent with the build.postmarketos.org codebase.
196 lines
6.9 KiB
Python
196 lines
6.9 KiB
Python
# Copyright 2020 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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import logging
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import os
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import re
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import pmb.chroot
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import pmb.config
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import pmb.config.init
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import pmb.helpers.pmaports
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import pmb.helpers.run
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def folder_size(args, path):
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"""
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Run `du` to calculate the size of a folder (this is less code and
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faster than doing the same task in pure Python). This result is only
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approximatelly right, but good enough for pmbootstrap's use case (#760).
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:returns: folder size in bytes
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"""
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output = pmb.helpers.run.root(args, ["du", "--summarize",
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"--block-size=1",
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path], output_return=True)
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# Only look at last line to filter out sudo garbage (#1766)
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last_line = output.split("\n")[-2]
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ret = int(last_line.split("\t")[0])
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return ret
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def check_grsec(args):
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"""
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Check if the current kernel is based on the grsec patchset, and if
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the chroot_deny_chmod option is enabled. Raise an exception in that
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case, with a link to the issue. Otherwise, do nothing.
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"""
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path = "/proc/sys/kernel/grsecurity/chroot_deny_chmod"
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if not os.path.exists(path):
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return
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raise RuntimeError("You're running a kernel based on the grsec"
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" patchset. This is not supported.")
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def check_binfmt_misc(args):
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"""
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Check if the 'binfmt_misc' module is loaded by checking, if
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/proc/sys/fs/binfmt_misc/ exists. If it exists, then do nothing.
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Otherwise, raise an exception pointing to user to the Wiki.
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"""
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path = "/proc/sys/fs/binfmt_misc/status"
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if os.path.exists(path):
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return
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link = "https://postmarketos.org/binfmt_misc"
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raise RuntimeError("It appears that your system has not loaded the"
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" module 'binfmt_misc'. This is required to run"
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" foreign architecture programs with QEMU (eg."
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" armhf on x86_64):\n See: <" + link + ">")
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def migrate_success(args, version):
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logging.info("Migration to version " + str(version) + " done")
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with open(args.work + "/version", "w") as handle:
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handle.write(str(version) + "\n")
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def migrate_work_folder(args):
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# Read current version
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current = 0
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path = args.work + "/version"
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if os.path.exists(path):
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with open(path, "r") as f:
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current = int(f.read().rstrip())
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# Compare version, print warning or do nothing
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required = pmb.config.work_version
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if current == required:
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return
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logging.info("WARNING: Your work folder version needs to be migrated"
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" (from version " + str(current) + " to " + str(required) +
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")!")
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# 0 => 1
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if current == 0:
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# Ask for confirmation
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logging.info("Changelog:")
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logging.info("* Building chroots have a different username (#709)")
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logging.info("Migration will do the following:")
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logging.info("* Zap your chroots")
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logging.info("* Adjust '" + args.work + "/config_abuild/abuild.conf'")
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if not pmb.helpers.cli.confirm(args):
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raise RuntimeError("Aborted.")
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# Zap and update abuild.conf
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pmb.chroot.zap(args, False)
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conf = args.work + "/config_abuild/abuild.conf"
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if os.path.exists(conf):
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pmb.helpers.run.root(args, ["sed", "-i",
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"s./home/user/./home/pmos/.g", conf])
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# Update version file
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migrate_success(args, 1)
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current = 1
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# 1 => 2
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if current == 1:
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# Ask for confirmation
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logging.info("Changelog:")
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logging.info("* Fix: cache_distfiles was writable for everyone")
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logging.info("Migration will do the following:")
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logging.info("* Fix permissions of '" + args.work +
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"/cache_distfiles'")
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if not pmb.helpers.cli.confirm(args):
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raise RuntimeError("Aborted.")
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# Fix permissions
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dir = "/var/cache/distfiles"
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for cmd in [["chown", "-R", "root:abuild", dir],
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["chmod", "-R", "664", dir],
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["chmod", "a+X", dir]]:
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pmb.chroot.root(args, cmd)
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migrate_success(args, 2)
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current = 2
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if current == 2:
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# Ask for confirmation
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logging.info("Changelog:")
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logging.info("* Device chroots have a different user UID (#1576)")
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logging.info("Migration will do the following:")
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logging.info("* Zap your chroots")
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if not pmb.helpers.cli.confirm(args):
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raise RuntimeError("Aborted.")
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# Zap chroots
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pmb.chroot.zap(args, False)
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# Update version file
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migrate_success(args, 3)
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current = 3
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if current == 3:
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# Ask for confirmation
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path = args.work + "/cache_git"
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logging.info("Changelog:")
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logging.info("* pmbootstrap clones repositories with host system's")
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logging.info(" 'git' instead of using it from an Alpine chroot")
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logging.info("Migration will do the following:")
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logging.info("* Check if 'git' is installed")
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logging.info("* Change ownership to your user: " + path)
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if not pmb.helpers.cli.confirm(args):
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raise RuntimeError("Aborted.")
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# Require git, set cache_git ownership
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pmb.config.init.require_programs()
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if os.path.exists(path):
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uid_gid = "{}:{}".format(os.getuid(), os.getgid())
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pmb.helpers.run.root(args, ["chown", "-R", uid_gid, path])
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else:
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os.makedirs(path, 0o700, True)
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# Update version file
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migrate_success(args, 4)
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current = 4
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# Can't migrate, user must delete it
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if current != required:
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raise RuntimeError("Sorry, we can't migrate that automatically. Please"
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" run 'pmbootstrap shutdown', then delete your"
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" current work folder manually ('sudo rm -rf " +
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args.work + "') and start over with 'pmbootstrap"
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" init'. All your binary packages and caches will"
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" be lost.")
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def validate_hostname(hostname):
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"""
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Check whether the string is a valid hostname, according to
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<http://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names>
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"""
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# Check length
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if len(hostname) > 63:
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logging.fatal("ERROR: Hostname '" + hostname + "' is too long.")
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return False
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# Check that it only contains valid chars
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if not re.match("^[0-9a-z-]*$", hostname):
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logging.fatal("ERROR: Hostname must only contain letters (a-z),"
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" digits (0-9) or minus signs (-)")
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return False
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# Check that doesn't begin or end with a minus sign
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if hostname[:1] == "-" or hostname[-1:] == "-":
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logging.fatal("ERROR: Hostname must not begin or end with a minus sign")
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return False
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return True
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