useful_scripts/create_systemd_service.py

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2024-02-25 15:24:22 +00:00
#!/usr/bin/env python3
import sys, os, subprocess
help_text = f"""
Usage: {os.path.basename(__file__)} $1 $2 $3
required:
$1 - name of service
$2 - absolute path to script
optional:
$3 - description of service
"""
number_of_required_arguments = 2
number_of_optional_arguments = 1
if len(sys.argv) == 1:
print(help_text)
sys.exit()
elif sys.argv[1] in ["help", "-h"]:
print(help_text)
sys.exit()
elif len(sys.argv) - 1 < number_of_required_arguments:
print(f"You provided not enough arguments")
print(help_text)
sys.exit(1)
elif len(sys.argv) > number_of_required_arguments + number_of_optional_arguments + 1:
print(f"You provided extra arguments")
print(help_text)
sys.exit(1)
name_of_service = sys.argv[1]
path_to_script = sys.argv[2]
description = sys.argv[3] if sys.argv[3:4] else "" # empty if no description
if not os.path.isabs(path_to_script):
print("Path to script should be absolute!")
print(help_text)
sys.exit(1)
elif not os.path.isfile(path_to_script):
print("Path to script should exist and must be file!")
print(help_text)
sys.exit(1)
service_file = f"""
[Unit]
Description={description}
After=network-online.target
[Service]
Type=oneshot
ExecStart={path_to_script}
StandardOutput=journal
StandardError=journal
[Install]
WantedBy=multi-user.target
"""
try:
with open(f"/lib/systemd/system/{name_of_service}.service", "w") as f:
f.write(service_file)
subprocess.run(f"chmod +x {path_to_script}", shell=True, check=True)
os.system(f"systemctl enable --now {name_of_service} && echo Success!!!")
except:
print("Something went wrong...")
sys.exit(1)