github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/interfaces/systemd/service.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016-2017 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package systemd
    21  
    22  import (
    23  	"bytes"
    24  	"fmt"
    25  )
    26  
    27  // Service describes a single systemd service file
    28  type Service struct {
    29  	Description     string
    30  	Type            string
    31  	RemainAfterExit bool
    32  	ExecStart       string
    33  	ExecStop        string
    34  }
    35  
    36  func (s *Service) String() string {
    37  	var buf bytes.Buffer
    38  	if s.Description != "" {
    39  		buf.WriteString("[Unit]\n")
    40  		fmt.Fprintf(&buf, "Description=%s\n\n", s.Description)
    41  	}
    42  	buf.WriteString("[Service]\n")
    43  	if s.Type != "" {
    44  		fmt.Fprintf(&buf, "Type=%s\n", s.Type)
    45  	}
    46  	// "no" is the default in systemd so we don't neet to  write it
    47  	if s.RemainAfterExit {
    48  		buf.WriteString("RemainAfterExit=yes\n")
    49  	}
    50  	if s.ExecStart != "" {
    51  		fmt.Fprintf(&buf, "ExecStart=%s\n", s.ExecStart)
    52  	}
    53  	if s.ExecStop != "" {
    54  		fmt.Fprintf(&buf, "ExecStop=%s\n", s.ExecStop)
    55  	}
    56  	fmt.Fprintf(&buf, "\n[Install]\nWantedBy=multi-user.target\n")
    57  	return buf.String()
    58  }