func fromReference(rfile string) error {
usingreference = true
var fileinfo os.FileInfo
var err error
fileinfo, err = coreutils.Stat(rfile)
if err != nil {
fmt.Fprintf(os.Stderr, "Error while reading info for '%s': %v\n", rfile, err)
os.Exit(1)
}
coreutils.Mode = fileinfo.Mode()
return nil
}
func GetAtimeMtime(name string, noderef bool) (atime, mtime time.Time) {
coreutils.Noderef = noderef
fileinfo, err := coreutils.Stat(name)
if err != nil {
fmt.Fprintf(os.Stderr, "Error while getting fileinfo for '%s': %v\n", name, err)
os.Exit(1)
}
nsecs = fileinfo.Sys().LastAccessTime.Nanoseconds()
secs = nsecs / uint64(1000000000)
nsecs = nsecs % uint64(1000000000)
atime = time.Unix(secs, nsecs)
nsecs = fileinfo.Sys().LastAccessTime.Nanoseconds()
secs = nsecs / uint64(1000000000)
nsecs = nsecs % uint64(1000000000)
mtime = time.Unix(secs, nsecs)
return atime, mtime
}
func main() {
goopt.Author = "William Pearson"
goopt.Version = "Cp"
goopt.Summary = "Copy each SOURCE to DEST"
goopt.Usage = func() string {
return fmt.Sprintf("Usage:\t%s [OPTION]... SOURCE(...) DEST\n or:\t%s [OPTION]... -t DEST SOURCE\n", os.Args[0], os.Args[0]) + goopt.Summary + "\n\n" + goopt.Help()
}
goopt.Description = func() string {
return goopt.Summary + "\n\nUnless --help or --version is passed."
}
backup := goopt.Flag([]string{"-b", "--backup"}, nil, "Backup files before overwriting", "")
prompt := goopt.Flag([]string{"-i", "--interactive"}, nil, "Prompt before an overwrite. Override -f and -n.", "")
noclobber := goopt.Flag([]string{"-n", "--no-clobber"}, []string{"-f", "--force"}, "Do not overwrite", "Never prompt before an overwrite")
hardlink := goopt.Flag([]string{"-l", "--link"}, nil, "Make hard links instead of copying", "")
nodereference := goopt.Flag([]string{"-P", "--no-dereference"}, []string{"-L", "--dereference"}, "Never follow symlinks", "Always follow symlinks")
/*preserve := goopt.Flag([]string{"-p", "--preserve"}, nil, "Preserve mode, ownership and timestamp attributes", "")*/
recurse := goopt.Flag([]string{"-r", "-R", "--recurse"}, nil, "Recursively copy files from SOURCE to TARGET", "")
goopt.OptArg([]string{"-S", "--suffix"}, "SUFFIX", "Override the usual backup suffix", setBackupSuffix)
symlink := goopt.Flag([]string{"-s", "--symbolic-link"}, nil, "Make symlinks instead of copying", "")
goopt.OptArg([]string{"-t", "--target"}, "TARGET", "Set the target with a flag instead of at the end", setTarget)
update := goopt.Flag([]string{"-u", "--update"}, nil, "Move only when DEST is missing or older than SOURCE", "")
verbose := goopt.Flag([]string{"-v", "--verbose"}, nil, "Output each file as it is processed", "")
goopt.NoArg([]string{"--version"}, "outputs version information and exits", coreutils.Version)
goopt.Parse(nil)
if len(goopt.Args) < 2 {
coreutils.PrintUsage()
}
coreutils.Noderef = *nodereference
j := 0
if target == "" {
target = goopt.Args[len(goopt.Args)-1]
j = 1
}
var sources []string
for i := range goopt.Args[j:] {
sources = append(sources, goopt.Args[i])
if *recurse {
if coreutils.Recurse(&sources) {
defer os.Exit(1)
}
}
}
destinfo, err := coreutils.Stat(target)
if err != nil && !os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "Error trying to get info to check if DEST is a directory: %v\n", err)
os.Exit(1)
}
isadir := err == nil && destinfo.IsDir()
if (len(goopt.Args) > 2 || (target != goopt.Args[len(goopt.Args)-1] && len(goopt.Args) > 1)) && !isadir {
fmt.Fprintf(os.Stderr, "Too many arguments for non-directory destination")
os.Exit(1)
}
for i := range sources {
dest := target
if sources[i] == "" {
continue
}
destinfo, err := coreutils.Stat(target)
exist := !os.IsNotExist(err)
if err != nil && exist {
fmt.Fprintf(os.Stderr, "Error trying to get info on target: %v\n", err)
os.Exit(1)
}
srcinfo, err := coreutils.Stat(sources[i])
if err != nil {
fmt.Fprintf(os.Stderr, "Error trying to get mod time on SRC: %v\n", err)
os.Exit(1)
}
mkdir := false
if srcinfo.IsDir() {
if isadir {
dest = dest + string(os.PathSeparator) + sources[i]
}
if !*recurse {
fmt.Printf("Skipping directory %s\n", sources[i])
continue
}
mkdir = true
} else if isadir {
dest = dest + string(os.PathSeparator) + filepath.Base(sources[i])
}
newer := true
if *update && exist {
newer = srcinfo.ModTime().After(destinfo.ModTime())
}
if !newer {
continue
}
promptres := true
if exist {
promptres = !*noclobber
if *prompt {
promptres = coreutils.PromptFunc(dest, false)
}
if promptres && *backup {
if err = os.Rename(dest, dest+backupsuffix); err != nil {
fmt.Fprintf(os.Stderr, "Error while backing up '%s' to '%s': %v\n", dest, dest+backupsuffix, err)
defer os.Exit(1)
continue
}
}
}
if !promptres {
continue
}
switch {
case mkdir:
if err = os.Mkdir(dest, coreutils.Mode); err != nil {
fmt.Fprintf(os.Stderr, "Error while making directory '%s': %v\n", dest, err)
defer os.Exit(1)
continue
}
if *verbose {
fmt.Printf("Copying directory '%s' to '%s'\n", sources[i], dest)
}
case *hardlink:
if err := os.Link(sources[i], dest); err != nil {
fmt.Fprintf(os.Stderr, "Error while linking '%s' to '%s': %v\n", dest, sources[i], err)
defer os.Exit(1)
continue
}
if *verbose {
fmt.Printf("Linked '%s' to '%s'\n", dest, sources[i])
}
case *symlink:
if err := os.Symlink(sources[i], dest); err != nil {
fmt.Fprintf(os.Stderr, "Error while linking '%s' to '%s': %v\n", dest, sources[i], err)
defer os.Exit(1)
continue
}
if *verbose {
fmt.Printf("Symlinked '%s' to '%s'\n", dest, sources[i])
}
default:
source, err := os.Open(sources[i])
if err != nil {
fmt.Fprintf(os.Stderr, "Error while opening source file '%s': %v\n", sources[i], err)
defer os.Exit(1)
continue
}
filebuf, err := ioutil.ReadAll(source)
if err != nil {
fmt.Fprintf(os.Stderr, "Error while reading source file, '%s', for copying: %v\n", sources[i], err)
defer os.Exit(1)
continue
}
destfile, err := os.Create(dest)
if err != nil {
fmt.Fprintf(os.Stderr, "Error while creating destination file, '%s': %v\n", dest, err)
defer os.Exit(1)
continue
}
destfile.Write(filebuf)
if *verbose {
fmt.Printf("'%s' copied to '%s'\n", sources[i], dest)
}
}
}
return
}
func main() {
goopt.Author = "William Pearson"
goopt.Version = "Ln"
goopt.Summary = "Make a LINK (whose name is optionally specified) to TARGET or make a link in DIRECTORY to each TARGET."
goopt.Usage = func() string {
return fmt.Sprintf("Usage:\t%s [OPTION]... TARGET (LINK)\n or:\t%s [OPTION]... TARGET... DIRECTORY\n or:\t%s [OPTION]... -t DIRECTORY TARGET...\n", os.Args[0], os.Args[0]) + goopt.Summary + "\n\n" + goopt.Help()
}
goopt.Description = func() string {
return goopt.Summary + "\n\nUnless --help or --version is passed."
}
backup := goopt.Flag([]string{"-b", "--backup"}, nil, "Backup files before overwriting", "")
prompt := goopt.Flag([]string{"-i", "--interactive"}, nil, "Prompt before removing any existing files.", "")
force := goopt.Flag([]string{"-f", "--force"}, nil, "Remove existing files which match link names", "")
directories := goopt.Flag([]string{"-d", "-F", "--directory"}, nil, "Allow attempts to hard link directories", "")
nodereference := goopt.Flag([]string{"-n", "--no-dereference"}, nil, "treat LINK as a normal file if it is a symbolic link", "")
logical := goopt.Flag([]string{"-L", "--logical"}, []string{"-P", "--physical"}, "Dereference TARGET if it is a symbolic link", "Make hard links directly to symbolic links. (this is default)")
relative := goopt.Flag([]string{"-r", "--relative"}, nil, "Make symbolic links relative to link location", "")
symbolic := goopt.Flag([]string{"-s", "--symbolic"}, nil, "Make symbolic links rather than hard links", "")
goopt.OptArg([]string{"-S", "--suffix"}, "SUFFIX", "Override the usual backup suffix", coreutils.SetBackupSuffix)
goopt.OptArg([]string{"-t", "--target"}, "TARGET", "Set the target with a flag instead of at the end", coreutils.SetTarget)
verbose := goopt.Flag([]string{"-v", "--verbose"}, nil, "Output each file as it is processed", "")
goopt.NoArg([]string{"--version"}, "outputs version information and exits", coreutils.Version)
goopt.Parse(nil)
if len(goopt.Args) < 2 {
coreutils.PrintUsage()
}
coreutils.Noderef = *nodereference
i := 0
isadir := false
exists := false
if coreutils.Target == "" {
if len(goopt.Args) > 1 {
i = 1
coreutils.Target = goopt.Args[len(goopt.Args)-1]
} else {
coreutils.Target = filepath.Base(goopt.Args[0])
}
} else {
isadir = true
}
fileinfo, err := coreutils.Stat(coreutils.Target)
if err != nil && !os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "Error getting file info for '%s': %v\n", coreutils.Target, err)
os.Exit(1)
}
if err == nil {
exists = true
if fileinfo.IsDir() {
isadir = true
}
}
for j := range goopt.Args[i:] {
coreutils.Noderef = !*logical
fileinfo, err = coreutils.Stat(goopt.Args[j])
if err != nil && !os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "Error getting file info for '%s': %v\n", goopt.Args[j], err)
defer os.Exit(1)
continue
}
if err == nil && !*symbolic && !*directories && fileinfo.IsDir() {
fmt.Fprintf(os.Stderr, "Attempt to hard link a directory")
defer os.Exit(1)
continue
}
coreutils.Noderef = *nodereference
dest := coreutils.Target
if isadir {
dest = dest + filepath.Base(goopt.Args[j])
fileinfo, err = coreutils.Stat(dest)
if err != nil && !os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "Error getting file info for '%s': %v\n", dest, err)
defer os.Exit(1)
continue
}
if err == nil {
exists = true
}
}
promptno := true
if exists {
if *backup {
coreutils.Backup(dest)
}
if *force {
os.Remove(dest)
} else if *prompt {
promptno = coreutils.PromptFunc(dest, false)
if promptno {
os.Remove(dest)
}
}
if !*relative {
dest, err = filepath.Abs(dest)
if err != nil {
fmt.Fprintf(os.Stderr, "Error making absolute path from '%s'", dest, err)
}
}
}
if !promptno {
exists = false
continue
}
if *symbolic {
os.Symlink(goopt.Args[j], dest)
} else {
os.Link(goopt.Args[j], dest)
}
if *verbose {
fmt.Printf("'%s' -> '%s'\n", dest, goopt.Args[j])
}
exists = false
}
return
}