github.com/mergetb/u-root@v4.0.1-0.20190719191109-b70b86b73e5b+incompatible/cmds/core/gzip/gzip.go (about) 1 // Copyright 2012-2017 the u-root Authors. All rights reserved 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "flag" 9 "fmt" 10 "os" 11 "path/filepath" 12 13 "github.com/u-root/u-root/pkg/gzip" 14 ) 15 16 var cmdLine = flag.CommandLine 17 18 func usage() { 19 fmt.Fprintf(os.Stderr, "Usage of %s:\n", filepath.Base(os.Args[0])) 20 cmdLine.PrintDefaults() 21 } 22 23 func main() { 24 var opts gzip.Options 25 26 cmdLine.Usage = usage 27 28 if err := opts.ParseArgs(os.Args, cmdLine); err != nil { 29 fmt.Fprintf(os.Stderr, "%s\n", err) 30 cmdLine.Usage() 31 os.Exit(2) 32 } 33 34 var input []string 35 if opts.Stdin { 36 input = []string{"/dev/stdin"} 37 } else { 38 input = cmdLine.Args() 39 } 40 41 for _, path := range input { 42 f := gzip.File{Path: path, Options: &opts} 43 if err := f.CheckPath(); err != nil { 44 if !opts.Quiet { 45 fmt.Fprintf(os.Stderr, "%s\n", err) 46 } 47 continue 48 } 49 50 if err := f.CheckOutputStdout(); err != nil { 51 if !opts.Quiet { 52 fmt.Fprintf(os.Stderr, "%s\n", err) 53 } 54 os.Exit(1) 55 } 56 57 if err := f.CheckOutputPath(); err != nil { 58 if !opts.Quiet { 59 fmt.Fprintf(os.Stderr, "%s\n", err) 60 } 61 continue 62 } 63 64 if err := f.Process(); err != nil { 65 if !opts.Quiet { 66 fmt.Fprintf(os.Stderr, "%s\n", err) 67 } 68 } 69 70 if err := f.Cleanup(); err != nil { 71 if !opts.Quiet { 72 fmt.Fprintf(os.Stderr, "%s\n", err) 73 } 74 continue 75 } 76 } 77 }