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114 changes: 114 additions & 0 deletions
114
internal/applets/debianutils/remove-shell/remove-shell.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| // | ||
| // mimixbox/internal/applets/debianutils/remove-shell/remove-shell.go | ||
| // | ||
| // Copyright 2021 Naohiro CHIKAMATSU | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| package removeShell | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
|
|
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| "github.com/jessevdk/go-flags" | ||
| mb "github.com/nao1215/mimixbox/internal/lib" | ||
| ) | ||
|
|
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| const cmdName string = "remove-shell" | ||
|
|
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| const version = "1.0.0" | ||
|
|
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| var osExit = os.Exit | ||
|
|
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| type options struct { | ||
| Version bool `short:"v" long:"version" description:"Show remove-shell command version"` | ||
| } | ||
|
|
||
| // Exit code | ||
| const ( | ||
| ExitSuccess int = iota // 0 | ||
| ExitFailuer | ||
| ) | ||
|
|
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| func Run() (int, error) { | ||
| var opts options | ||
| var args []string | ||
| var err error | ||
|
|
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| if args, err = parseArgs(&opts); err != nil { | ||
| return ExitFailuer, nil | ||
| } | ||
| return removeShell(args) | ||
| } | ||
|
|
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| func removeShell(args []string) (int, error) { | ||
| f, err := os.OpenFile(mb.TmpShellsFile(), os.O_CREATE|os.O_WRONLY, 0644) | ||
| if err != nil { | ||
| return ExitFailuer, err | ||
| } | ||
| defer f.Close() | ||
|
|
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| lines, err := mb.ReadFileToStrList(mb.ShellsFilePath) | ||
| if err != nil { | ||
| return ExitFailuer, err | ||
| } | ||
|
|
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| lines = mb.ChopAll(lines) | ||
| for _, shell := range args { | ||
| lines = mb.Remove(lines, shell) | ||
| } | ||
| for _, v := range lines { | ||
| fmt.Fprintln(f, v) | ||
| } | ||
|
|
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| err = mb.Copy(mb.TmpShellsFile(), mb.ShellsFilePath) | ||
| if err != nil { | ||
| mb.RemoveFile(mb.TmpShellsFile(), false) | ||
| return ExitFailuer, err | ||
| } | ||
|
|
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| mb.RemoveFile(mb.TmpShellsFile(), false) | ||
| return ExitSuccess, nil | ||
| } | ||
|
|
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| func parseArgs(opts *options) ([]string, error) { | ||
| p := initParser(opts) | ||
|
|
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| args, err := p.Parse() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| if opts.Version { | ||
| mb.ShowVersion(cmdName, version) | ||
| osExit(ExitSuccess) | ||
| } | ||
|
|
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| if !isValidArgNr(args) { | ||
| fmt.Fprintln(os.Stderr, cmdName+": shellname [shellname ...]") | ||
| osExit(ExitFailuer) | ||
| } | ||
| return args, nil | ||
| } | ||
|
|
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| func initParser(opts *options) *flags.Parser { | ||
| parser := flags.NewParser(opts, flags.Default) | ||
| parser.Name = cmdName | ||
| parser.Usage = "[OPTIONS] SHELL_NAME" | ||
|
|
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| return parser | ||
| } | ||
|
|
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| func isValidArgNr(args []string) bool { | ||
| return len(args) >= 1 | ||
| } |