mktar

   1 #!/usr/bin/env bash
   2
   3 #=======================================================================
   4 # mktar
   5 # File ID: 5818b856-0ba9-11de-b2c1-000475e441b9
   6 #
   7 # Move a whole subdirectory tree into a single .tar.gz file.
   8 #
   9 # Author: Øyvind A. Holm <sunny@sunbase.org>
  10 # License: GNU General Public License version 2 or later.
  11 #=======================================================================
  12
  13 progname=mktar
  14 VERSION=0.29.0
  15
  16 STD_SUFFIX=''
  17
  18 ARGS="$(getopt -o "\
  19 1\
  20 A\
  21 G\
  22 d\
  23 f\
  24 h\
  25 i\
  26 L\
  27 m\
  28 O\
  29 o:\
  30 P:\
  31 q\
  32 r\
  33 S:\
  34 s:\
  35 v\
  36 X\
  37 x\
  38 z\
  39 " -l "\
  40 dirs-only,\
  41 force,\
  42 help,\
  43 incremental,\
  44 dereference,\
  45 random-mac,\
  46 no-git-check,\
  47 no-actime,\
  48 no-uuid,\
  49 no-xattrs,\
  50 numeric-owner,\
  51 output-dir:,\
  52 prefix:,\
  53 quiet,\
  54 remove-files,\
  55 suffix:,\
  56 split:,\
  57 stdout,\
  58 verbose,\
  59 version,\
  60 xz,\
  61 gzip,\
  62 " -n "$progname" -- "$@")"
  63 test "$?" = "0" || exit 1
  64 eval set -- "$ARGS"
  65
  66 opt_1=0
  67 opt_no_git_check=0
  68 opt_dirs_only=0
  69 opt_force=0
  70 opt_help=0
  71 opt_incremental=0
  72 opt_dereference=0
  73 opt_random_mac=0
  74 opt_no_uuid=0
  75 opt_no_actime=0
  76 opt_no_xattrs=0
  77 opt_numeric_owner=0
  78 opt_output_dir=''
  79 opt_prefix=''
  80 opt_quiet=0
  81 opt_remove_files=0
  82 opt_suffix="$STD_SUFFIX"
  83 opt_split=''
  84 opt_stdout=0
  85 opt_verbose=0
  86 opt_xz=0
  87 opt_gzip=0
  88 while :; do
  89     case "$1" in
  90         -1) opt_1=1; shift ;;
  91         -G|--no-git-check) opt_no_git_check=1; shift ;;
  92         -d|--dirs-only) opt_dirs_only=1; shift ;;
  93         -f|--force) opt_force=1; shift ;;
  94         -h|--help) opt_help=1; shift ;;
  95         -i|--incremental) opt_incremental=1; shift ;;
  96         -L|--dereference) opt_dereference=1; shift ;;
  97         -m|--random-mac) opt_random_mac=1; shift ;;
  98         --no-uuid) opt_no_uuid=1; shift ;;
  99         --numeric-owner) opt_numeric_owner=1; shift ;;
 100         -o|--output-dir) opt_output_dir="$2"; shift 2 ;;
 101         -P|--prefix) opt_prefix="$2"; shift 2 ;;
 102         -q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
 103         -r|--remove-files) opt_remove_files=1; shift ;;
 104         -S|--suffix) opt_suffix="$2"; shift 2 ;;
 105         -s|--split) opt_split="$2"; shift 2 ;;
 106         -O|--stdout) opt_stdout=1; shift ;;
 107         -v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
 108         --version) echo $progname $VERSION; exit 0 ;;
 109         -A|--no-actime) opt_no_actime=1; shift ;;
 110         -X|--no-xattrs) opt_no_xattrs=1; shift ;;
 111         -x|--xz) opt_xz=1; shift ;;
 112         -z|--gzip) opt_gzip=1; shift ;;
 113         --) shift; break ;;
 114         *) echo $progname: Internal error >&2; exit 1 ;;
 115     esac
 116 done
 117 opt_verbose=$(($opt_verbose - $opt_quiet))
 118
 119 if test "$opt_help" = "1"; then
 120     test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
 121     cat <<END
 122
 123 Move a whole subdirectory tree into a single $STD_SUFFIX.tar.gz file.
 124
 125 Usage: $progname [options] DIRECTORY [DIRECTORIES [...]]
 126
 127 Options:
 128
 129   -1
 130     Alias for "--split 1G". No file systems should have problems with
 131     this size, and it makes it easy to calculate the size of the .tar
 132     file.
 133   -d, --dirs-only
 134     Ignore non-directory arguments.
 135   -f, --force
 136     Don't abort if the .tar file exists, delete it before proceeding.
 137   -G, --no-git-check
 138     To protect against potential data loss, it first loops through all
 139     arguments to check that none of them are stored in Git. If any files
 140     are stored under any of the directories, it aborts. Useful with for
 141     example git-annex, where only a symlink would be stored in the
 142     archive file. This option disables the check.
 143   -h, --help
 144     Show this help.
 145   -i, --incremental
 146     Create a .snar file with information for creating incremental
 147     backups. Uses the -g/--listed-incremental option in GNU tar.
 148   -L, --dereference
 149     Don't pack symlinks, include the actual files they point to.
 150   -m, --random-mac
 151     Use random MAC address in UUID file label.
 152   --no-uuid
 153     Don't create UUID label in the .tar file.
 154   --numeric-owner
 155     Use numbers for user/group names.
 156   -O, --stdout
 157     Send the .tar output to stdout instead of creating files on disk.
 158     All nonsensical options are ignored, for example --split. Does not
 159     work with compression.
 160   -o DIR, --output-dir DIR
 161     Store the tar files in DIR instead of the current directory.
 162   -P PREFIX, --prefix PREFIX
 163     Use PREFIX at the beginning of the tar filenames. Doesn't change the
 164     name of the extracted files. Adds a terminating '.' if it doesn't
 165     exist.
 166   -q, --quiet
 167     Be more quiet. Can be repeated to increase silence.
 168   -r, --remove-files
 169     Remove files in DIRECTORY immediately after they've been added to
 170     the archive. Can be used when there's not enough disk space for the
 171     archive.
 172   -S SUFFIX, --suffix SUFFIX
 173     Add a custom suffix after the directory name and before the .tar
 174     extension in the output filename. No changes are made to the
 175     resulting tar file, only the file name is different. An intial '.'
 176     is added if it's missing.
 177     Default value: "$STD_SUFFIX".
 178   -s SIZE, --split SIZE
 179     Split the .tar file into files with SIZE bytes each. Allowed values
 180     are those understood by the -b/--bytes option in split(1). These
 181     files are not compressed by default, to make it easier to extract
 182     data from the files without starting from the beginning.
 183   -v, --verbose
 184     Increase level of verbosity. Can be repeated.
 185   --version
 186     Print version information.
 187   -A, --no-actime
 188     Don't store atime or ctime in the tar file. Use with --no-uuid to
 189     generate identical tar files.
 190   -X, --no-xattrs
 191     Don't use --xattrs with tar(1), create standard tar archive without
 192     extended attributes and nanoseconds.
 193   -x, --xz
 194     Compress the archives with xz(1) after the files are added.
 195   -z, --gzip
 196     Compress the archives with gzip(1) after the files are added.
 197
 198 END
 199     exit 0
 200 fi
 201
 202 if test "$opt_xz" = "1" -a "$opt_gzip" = "1"; then
 203     echo $progname: Cannot mix the --gzip and --xz options >&2
 204     exit 1
 205 fi
 206
 207 if test "$opt_1" = "1" -a -n "$opt_split"; then
 208     echo $progname: Cannot mix the -1 and --split options >&2
 209     exit 1
 210 fi
 211
 212 if test "$opt_stdout" = "1" -a -n "$(echo $opt_gzip$opt_xz | grep 1)"; then
 213     echo $progname: Cannot use compression with -O/--stdout >&2
 214     exit 1
 215 fi
 216
 217 test "$opt_1" = "1" && opt_split=1G
 218
 219 if test "$opt_dereference" = "1"; then
 220     dereference_str="--dereference"
 221 else
 222     dereference_str=""
 223 fi
 224
 225 if test "$opt_no_actime" = "1"; then
 226     actime_str="--pax-option=delete=atime,delete=ctime"
 227 else
 228     actime_str=""
 229 fi
 230
 231 if test "$opt_random_mac" = "1"; then
 232     random_mac_str="--random-mac"
 233 else
 234     random_mac_str=""
 235 fi
 236
 237 if test "$opt_remove_files" = "1"; then
 238     rm_files_str="--remove-files"
 239 else
 240     rm_files_str=""
 241 fi
 242
 243 if test "$opt_no_xattrs" = "1"; then
 244     xattrs_str=""
 245 else
 246     xattrs_str="--xattrs"
 247 fi
 248
 249 if test "$opt_numeric_owner" = "1"; then
 250     numeric_str="--numeric-owner"
 251 else
 252     numeric_str=""
 253 fi
 254
 255 for f in "$@"; do
 256     if test -d "$f" -o "$opt_dirs_only" != "1"; then
 257         if test "$opt_no_git_check" != "1"; then
 258             git ls-files "$f" | grep -q . >&2 && {
 259                 echo -n "$progname: $f: " >&2
 260                 if test -d "$f"; then
 261                     echo Files are stored in Git below this directory >&2
 262                 else
 263                     echo File is stored in Git >&2
 264                 fi
 265                 echo $progname: Use -G/--no-git-check to add it anyway >&2
 266                 exit 1
 267             }
 268         fi
 269     else
 270         echo $progname: $f: Not a directory >&2
 271     fi
 272 done
 273
 274 prefix="$opt_prefix"
 275 if test -n "$prefix"; then
 276     echo "$prefix" | grep -q '\.$' || prefix="$prefix."
 277 fi
 278
 279 suffix="$opt_suffix"
 280 if test -n "$suffix"; then
 281     echo "$suffix" | grep -q '^\.' || suffix=".$suffix"
 282 fi
 283
 284 if test -n "$opt_output_dir"; then
 285     if test ! -d "$opt_output_dir/."; then
 286         echo "$progname: $opt_output_dir: Directory not found" >&2
 287         exit 1
 288     fi
 289     output_dir="$opt_output_dir/"
 290 else
 291     output_dir="";
 292 fi
 293
 294 for f in "$@"; do
 295     dir="$(echo -n "$f" | sed 's/\/*$//')"
 296     if [ -z "$dir" ]; then
 297         echo "$progname: $f: Argument is empty after stripping slash" >&2
 298         exit 1
 299     fi
 300     tarfile="$output_dir$prefix$dir$suffix.tar"
 301
 302     if test $opt_verbose -ge 2; then
 303         echo $progname: dir = $dir >&2
 304     fi
 305
 306     if [ -d "$dir" -o "$opt_dirs_only" != "1" ]; then
 307         echo >&2
 308         echo $progname: Packing $dir... >&2
 309
 310         if test "$opt_stdout" != "1"; then
 311             if ls "$tarfile"* 2>/dev/null | grep -q .; then
 312                 if test "$opt_force" = "1"; then
 313                     rm -fv "$tarfile"*
 314                 else
 315                     echo "$progname: $tarfile* already exist" >&2
 316                     exit 1
 317                 fi
 318             fi
 319         fi
 320
 321         echo "$dir" | grep -q / && {
 322             echo "$progname: $dir: Slashes not allowed in the file name" >&2
 323             exit 1
 324         }
 325
 326         if test "$opt_no_uuid" = "1"; then
 327             label_str=""
 328         else
 329             uuid=$(
 330                 suuid -t mktar --raw -w eo $random_mac_str \
 331                     -c "<c_mktar> <filename>$tarfile</filename> <host>$(
 332                         hostname
 333                     )</host> <directory>$(/bin/pwd)</directory> </c_mktar>"
 334             ) || {
 335                 echo $progname: suuid error >&2
 336                 exit 1
 337             }
 338             label_str="--label=$uuid"
 339         fi
 340         if test "$opt_incremental" = "1"; then
 341             incremental_str="--listed-incremental $prefix$dir$suffix.snar"
 342         else
 343             incremental_str=""
 344         fi
 345         tar_args="$incremental_str $rm_files_str"
 346         tar_args="$tar_args --force-local $actime_str --sort=name --sparse"
 347         tar_args="$tar_args $dereference_str $numeric_str $xattrs_str"
 348         tar_args="$tar_args $label_str"
 349         if test "$opt_stdout" = "1"; then
 350             echo $progname: Sending to stdout >&2
 351             echo $progname: tar c $tar_args $dir >&2
 352             tar c $tar_args "$dir" || exit 1
 353             continue
 354         fi
 355         if test -n "$opt_split"; then
 356             echo $progname: tar c $tar_args $dir \
 357                  \| split -b $opt_split --verbose - $tarfile.split_ >&2
 358             tar c $tar_args "$dir" \
 359             | split -b $opt_split --verbose - "$tarfile.split_" || exit 1
 360             if test ! -e "$tarfile.split_ab"; then
 361                 mv -vi "$tarfile.split_aa" "$tarfile" || exit 1
 362             fi
 363             test "$opt_xz" = "1" && xz -v "$tarfile"*
 364             test "$opt_gzip" = "1" && gzip -vn --rsyncable "$tarfile"*
 365         else
 366             echo $progname: tar cf $tarfile $tar_args $dir >&2
 367             tar cf "$tarfile" $tar_args "$dir" || exit 1
 368             if test "$opt_stdout" != "1"; then
 369                 ls -la "$tarfile" >&2
 370                 test "$opt_xz" = "1" && xz -v "$tarfile"
 371                 test "$opt_gzip" = "1" && gzip -vn --rsyncable "$tarfile"
 372             fi
 373         fi
 374     fi
 375 done
 376
 377 exit 0