github.com/rigado/snapd@v2.42.5-go-mod+incompatible/cmd/snapctl/main.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2014-2015 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 main
    21  
    22  import (
    23  	"fmt"
    24  	"os"
    25  
    26  	"github.com/snapcore/snapd/client"
    27  	"github.com/snapcore/snapd/dirs"
    28  	"github.com/snapcore/snapd/xdgopenproxy"
    29  )
    30  
    31  var clientConfig = client.Config{
    32  	// snapctl should not try to read $HOME/.snap/auth.json, this will
    33  	// result in apparmor denials and configure task failures
    34  	// (LP: #1660941)
    35  	DisableAuth: true,
    36  
    37  	// we need the less privileged snap socket in snapctl
    38  	Socket: dirs.SnapSocket,
    39  }
    40  
    41  func main() {
    42  	// check for internal commands
    43  	if len(os.Args) > 2 && os.Args[1] == "internal" {
    44  		switch os.Args[2] {
    45  		case "configure-core":
    46  			fmt.Fprintf(os.Stderr, "no internal core configuration anymore")
    47  			os.Exit(1)
    48  		}
    49  	}
    50  	if len(os.Args) == 3 && os.Args[1] == "user-open" {
    51  		if err := xdgopenproxy.Run(os.Args[2]); err != nil {
    52  			fmt.Fprintf(os.Stderr, "user-open error: %v\n", err)
    53  			os.Exit(1)
    54  		}
    55  		os.Exit(0)
    56  	}
    57  
    58  	// no internal command, route via snapd
    59  	stdout, stderr, err := run()
    60  	if err != nil {
    61  		fmt.Fprintf(os.Stderr, "error: %s\n", err)
    62  		os.Exit(1)
    63  	}
    64  
    65  	if stdout != nil {
    66  		os.Stdout.Write(stdout)
    67  	}
    68  
    69  	if stderr != nil {
    70  		os.Stderr.Write(stderr)
    71  	}
    72  }
    73  
    74  func run() (stdout, stderr []byte, err error) {
    75  	cli := client.New(&clientConfig)
    76  
    77  	cookie := os.Getenv("SNAP_COOKIE")
    78  	// for compatibility, if re-exec is not enabled and facing older snapd.
    79  	if cookie == "" {
    80  		cookie = os.Getenv("SNAP_CONTEXT")
    81  	}
    82  	return cli.RunSnapctl(&client.SnapCtlOptions{
    83  		ContextID: cookie,
    84  		Args:      os.Args[1:],
    85  	})
    86  }