lsblk: add parent kernel name column

For raw output used in scripts it is sometimes necessary
to reconstruct tree of devices.

Parent kernel name (PKNAME) provides needed information
to do that easily.

Signed-off-by: Milan Broz <mbroz@redhat.com>

diff --git a/misc-utils/lsblk.c b/misc-utils/lsblk.c
index 26dfaf9f0c0277713062cefc4c7b8b1ffaa100d5..1118e7eb94eee32e68460e1fe018ef91fec4b928 100644 (file)
--- a/misc-utils/lsblk.c
+++ b/misc-utils/lsblk.c
@@ -97,6 +97,7 @@ enum {
        COL_DZERO,
        COL_WWN,
        COL_RAND,
+       COL_PKNAME,
 };
 
 /* column names */
@@ -111,6 +112,7 @@ struct colinfo {
 static struct colinfo infos[] = {
        [COL_NAME]   = { "NAME",    0.25, TT_FL_TREE | TT_FL_NOEXTREMES, N_("device name") },
        [COL_KNAME]  = { "KNAME",   0.3, 0, N_("internal kernel device name") },
+       [COL_PKNAME] = { "PKNAME",   0.3, 0, N_("internal parent kernel device name") },
        [COL_MAJMIN] = { "MAJ:MIN", 6, 0, N_("major:minor device number") },
        [COL_FSTYPE] = { "FSTYPE",  0.1, TT_FL_TRUNC, N_("filesystem type") },
        [COL_TARGET] = { "MOUNTPOINT", 0.10, TT_FL_TRUNC, N_("where the device is mounted") },
@@ -144,7 +146,6 @@ static struct colinfo infos[] = {
        [COL_DMAX]   = { "DISC-MAX", 6, TT_FL_RIGHT, N_("discard max bytes") },
        [COL_DZERO]  = { "DISC-ZERO", 1, TT_FL_RIGHT, N_("discard zeroes data") },
        [COL_WWN]    = { "WWN",     18, 0, N_("unique storage identifier") },
-
 };
 
 struct lsblk {
@@ -600,6 +601,10 @@ static void set_tt_data(struct blkdev_cxt *cxt, int col, int id, struct tt_line
        case COL_KNAME:
                tt_line_set_data(ln, col, xstrdup(cxt->name));
                break;
+       case COL_PKNAME:
+               if (cxt->parent)
+                       tt_line_set_data(ln, col, xstrdup(cxt->parent->name));
+               break;
        case COL_OWNER:
        {
                struct passwd *pw = st_rc ? NULL : getpwuid(cxt->st.st_uid);