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Viewing File: libhooks.py
# -*- coding: utf-8 -*-
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2025 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
"""Hook integration functions for crontab operations."""
import logging
import shlex
import subprocess
from clcommon.cpapi import userdomains
from .constants import ISOLATION_WRAPPER
from .parser import parse_crontab_structure, write_crontab_structure
from .structure import ParsedCrontabLine
CRONTAB_BIN = "/usr/bin/crontab"
logger = logging.getLogger(__name__)
def migrate_crontab_docroot(
username: str,
old_docroot: str,
new_docroot: str,
) -> bool:
"""
Migrate crontab entries from old document root to new document root.
When a document root path changes (e.g., domain rename, docroot move),
this function updates all crontab entries that reference the old path
to use the new path instead.
Args:
username: Unix username whose crontab to migrate
old_docroot: Previous document root path
new_docroot: New document root path
Returns:
bool: True if migration was successful, False if no changes needed or error
Raises:
Exception: If crontab operations fail critically
"""
# Get current crontab for the user
list_result = subprocess.run(
[CRONTAB_BIN, "-u", username, "-l"],
capture_output=True,
)
# No existing crontab - nothing to migrate
if list_result.returncode != 0:
logger.debug(
"No crontab to migrate for user %s (returncode: %d)",
username,
list_result.returncode,
)
return False
existing_data = list_result.stdout
if not existing_data:
logger.debug("Empty crontab for user %s, nothing to migrate", username)
return False
# Parse existing crontab into structure
structure = parse_crontab_structure(existing_data)
# Check if old docroot section exists
if old_docroot not in structure.docroot_sections:
logger.debug(
"No crontab entries found for old docroot %s for user %s",
old_docroot,
username,
)
return False
# Migrate: move entries from old docroot to new docroot
old_entries = structure.docroot_sections.pop(old_docroot)
# Update wrapper commands in the entries to use new docroot
migrated_entries = []
for entry in old_entries:
if isinstance(entry, ParsedCrontabLine):
# Get the clean command (without wrapper)
clean_command = entry.get_clean_command()
has_newline = clean_command.endswith(b"\n")
command_str = clean_command.rstrip(b"\n").decode("utf-8", errors="replace")
# Rebuild with new docroot
quoted_command = shlex.quote(command_str)
prefix_parts = shlex.join([ISOLATION_WRAPPER, new_docroot, "bash", "-c"])
wrapped_command_str = f"{prefix_parts} {quoted_command}"
wrapped_command = wrapped_command_str.encode("utf-8")
if has_newline:
wrapped_command += b"\n"
migrated_entries.append(
ParsedCrontabLine(schedule=entry.schedule, command=wrapped_command)
)
else:
# Keep comments as-is
migrated_entries.append(entry)
# Add migrated entries to new docroot section (merge with existing if any)
if new_docroot in structure.docroot_sections:
structure.docroot_sections[new_docroot].extend(migrated_entries)
else:
structure.docroot_sections[new_docroot] = migrated_entries
# Write updated crontab
modified_data = write_crontab_structure(structure)
save_result = subprocess.run(
[CRONTAB_BIN, "-u", username, "-"],
input=modified_data,
capture_output=True,
)
if save_result.returncode != 0:
logger.error(
"Failed to save migrated crontab for user %s: %s",
username,
save_result.stderr.decode("utf-8", errors="replace"),
)
return False
logger.info(
"Successfully migrated crontab entries for user %s from %s to %s",
username,
old_docroot,
new_docroot,
)
return True
def cleanup_stale_crontab_sections(
username: str,
) -> bool:
"""
Remove crontab sections for docroots that no longer exist.
After a domain is deleted, this function cleans up crontab entries
for docroots that are no longer valid (not in the current domain list).
Args:
username: Unix username whose crontab to clean up
Returns:
bool: True if cleanup was performed, False if no changes needed
Raises:
Exception: If crontab operations fail critically
"""
# Get current valid docroots from userdomains
valid_docroots = {docroot for _, docroot in userdomains(username)}
# Get current crontab for the user
list_result = subprocess.run(
[CRONTAB_BIN, "-u", username, "-l"],
capture_output=True,
)
# No existing crontab - nothing to clean
if list_result.returncode != 0:
logger.debug(
"No crontab to clean for user %s (returncode: %d)",
username,
list_result.returncode,
)
return False
existing_data = list_result.stdout
if not existing_data:
logger.debug("Empty crontab for user %s, nothing to clean", username)
return False
structure = parse_crontab_structure(existing_data)
stale_docroots = [
docroot for docroot in structure.docroot_sections.keys() if docroot not in valid_docroots
]
if not stale_docroots:
logger.debug(
"No stale crontab sections found for user %s",
username,
)
return False
for stale_docroot in stale_docroots:
logger.info(
"Removing stale crontab section for user %s, docroot: %s",
username,
stale_docroot,
)
del structure.docroot_sections[stale_docroot]
modified_data = write_crontab_structure(structure)
save_result = subprocess.run(
[CRONTAB_BIN, "-u", username, "-"],
input=modified_data,
capture_output=True,
)
if save_result.returncode != 0:
logger.error(
"Failed to save cleaned crontab for user %s: %s",
username,
save_result.stderr.decode("utf-8", errors="replace"),
)
return False
logger.info(
"Successfully cleaned up %d stale crontab section(s) for user %s: %s",
len(stale_docroots),
username,
", ".join(stale_docroots),
)
return True
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