Patch to add new '--unit' option to parted

[Mike Cooper]

The "parted -m <dev> print" output is quite useful but it lacks the ability to 
specify an option to control the units which are displayed.  The attached 
source diff for parted 3.0 adds a new command line option '--unit 
compact|sector|byte|cylinder|chs' which provides the desired behavior.

A typical usage might be:
    parted -m --unit sector /dev/sda print

to get output like:

/dev/sda:1465149168s:scsi:512:512:msdos:ATA ST3750640AS;
1:2048s:29296639s:29294592s:fat32::boot;
2:29298686s:1465147391s:1435848706s:::;
5:29298688s:87889919s:58591232s:ext4::;
6:87891968s:146483199s:58591232s:ext4::;
7:146485248s:179685375s:33200128s:linux-swap(v1)::;
8:179687424s:1465147391s:1285459968s:ext4::;

I hope the development team will adopt this for future releases.

Best regards,

mike
*** parted/parted.c.ORIG        Sat Feb 18 13:39:29 2012
--- parted/parted.c     Sat Feb 18 13:53:40 2012
***************
*** 100,107 ****
--- 100,127 ----
    ALIGNMENT_MINIMAL,
    ALIGNMENT_OPTIMAL
  };
+ 
  ARGMATCH_VERIFY (align_args, align_types);
  
+ static char const *const unit_args[] =
+ {
+   "compact",
+   "sector",
+   "byte",
+   "cylinder",
+   "chs",
+   NULL
+ };
+ 
+ static PedUnit const unit_types[] =
+ {
+     PED_UNIT_COMPACT,
+     PED_UNIT_SECTOR,
+     PED_UNIT_BYTE,
+     PED_UNIT_CYLINDER,
+     PED_UNIT_CHS,
+ };
+ 
  typedef struct {
          time_t  last_update;
          time_t  predicted_time_left;
***************
*** 114,119 ****
--- 134,140 ----
          {"machine",     0, NULL, 'm'},
          {"script",      0, NULL, 's'},
          {"version",     0, NULL, 'v'},
+         {"unit",        required_argument, NULL, 'u'},
          {"align",       required_argument, NULL, 'a'},
          {"-pretend-input-tty", 0, NULL, PRETEND_INPUT_TTY},
          {NULL,          0, NULL, 0}
***************
*** 125,130 ****
--- 146,152 ----
          {"machine",     N_("displays machine parseable output")},
          {"script",      N_("never prompts for user intervention")},
          {"version",     N_("displays the version")},
+         {"unit=[compact|sector|byte|cylinder|chs]", N_("specify units to 
display")},
          {"align=[none|cyl|min|opt]", N_("alignment for new partitions")},
          {NULL,          NULL}
  };
***************
*** 1823,1828 ****
--- 1845,1851 ----
  _parse_options (int* argc_ptr, char*** argv_ptr)
  {
  int     opt, help = 0, list = 0, version = 0, wrong = 0;
+ PedUnit unit;
  
  while (1)
  {
***************
*** 1841,1846 ****
--- 1864,1874 ----
                    alignment = XARGMATCH ("--align", optarg,
                                           align_args, align_types);
                    break;
+                 case 'u':
+                   unit = XARGMATCH ("--unit", optarg,
+                                     unit_args, unit_types);
+                   ped_unit_set_default(unit);
+                   break;
                  case PRETEND_INPUT_TTY:
                    pretend_input_tty = 1;
                    break;