Hi all,
I worked on new column(8) --table implementation last weeks. The
result is available in my "column" branch
https://github.com/karelzak/util-linux/commits/column
The idea is to use "column --table" as command line interface to
libsmartcols features. All the changes should be backwardly
compatible, the non-table modes (fillrows and fillcols) are not
affected at all.
Features:
* column headers
* support text alignment to the right
* support multi-line cells (wrap text in cells)
* support text truncation
* hide specified columns
* reorder columns (IMHO unique feature)
* JSON output
* tree support
New options:
-n, --table-name <name> table name for JSON output
-O, --table-order <columns> specify order of output columns
-N, --table-columns <names> comma separated columns names
-E, --table-noextreme <columns> don't count long text from the columns to column width
-H, --table-hide <columns> don't print the columns
-R, --table-right <columns> right align text in these columns
-T, --table-truncate <columns> truncate text in the columns when necessary
-W, --table-wrap <columns> wrap text in the columns when necessary
-J, --json use JSON output format for table
-r, --tree <column> column to use tree-like output for the table
-i, --tree-id <column> line ID to specify child-parent relation
-p, --tree-parent <column> parent to specify child-parent relation
Overkill or useful? ;-)
Karel
Examples
pstree-like output:
$ ps -h -o pid,ppid,comm | column --table --tree 3 --tree-id 1 --tree-parent 2 --table-hide 2 --table-right 1
1799 bash
2254 bash
28427 └─mutt
4263 └─vim
7409 bash
10641 └─man
10657 └─less
16775 bash
11486 ├─ps
11487 └─column
diskstat:
$ column /proc/diskstats --table --table-columns MAJ,MIN,NAME,READ-COMP,READ-MERG,READ-SECS,READ-TIME,WRITE-COMP,WRITE-MERG,WRITE-SECS,WRITE-TIME,IO-CURR,IO-TIME,WTIME \
--table-hide MAJ,MIN \
--table-right 4,5,6,7,8,9,10,11,12,13,14 \
NAME READ-COMP READ-MERG READ-SECS READ-TIME WRITE-COMP WRITE-MERG WRITE-SECS WRITE-TIME IO-CURR IO-TIME WTIME
sda 13486466 149085 1288469300 9715620 45556082 7788088 1600182109 150180178 0 12935701 159902109
sda1 463 170 19002 131 91 0 161 331 0 334 462
sda2 778 16 63140 276 434 261 507574 12616 0 2382 12889
sda3 10710224 109592 1052352266 8018950 43983768 7022717 1153182094 126210185 0 11002854 134299501
sda4 1630396 32476 67166050 1039837 1197142 665798 343331344 23264993 0 2148041 24306932
sda5 1140435 241 168747746 655625 225373 73891 102920032 637906 0 627834 1293105
sda6 3703 6590 99512 691 4691 25421 240904 8418 0 6402 9108
sdb 448 0 22506 3088 1887 4 128 275 0 1449 3363
sdb1 404 0 19370 3035 12 4 128 60 0 1187 3095
loop0 22086 0 347311 2025 10738 0 844888 2226 0 1129 4265
loop1 947 0 26940 325 1100 0 133316 734 0 411 1058
md8 0 0 0 0 0 0 0 0 0 0 0
JSON:
$ grep -v nologin /etc/passwd | column --separator : --table --table-name passwd --json \
--table-columns USERNAME,PWD,UID,GID,GECOS,HOME,SHELL \
--table-hide PWD
{
"passwd": [
{"username": "root", "uid": "0", "gid": "0", "gecos": "root", "home": "/root", "shell": "/bin/bash"},
{"username": "sync", "uid": "5", "gid": "0", "gecos": "sync", "home": "/sbin", "shell": "/bin/sync"},
{"username": "shutdown", "uid": "6", "gid": "0", "gecos": "shutdown", "home": "/sbin", "shell": "/sbin/shutdown"},
{"username": "halt", "uid": "7", "gid": "0", "gecos": "halt", "home": "/sbin", "shell": "/sbin/halt"},
{"username": "kzak", "uid": "1000", "gid": "1000", "gecos": "Karel Zak,Home,,,", "home": "/home/kzak", "shell": "/bin/bash"},
{"username": "gamer", "uid": "1001", "gid": "1001", "gecos": null, "home": "/home/gamer", "shell": "/bin/bash"},
{"username": "test", "uid": "1002", "gid": "1002", "gecos": null, "home": "/home/test", "shell": "/bin/bash"}
]
}
findmnt-like output:
$ column /proc/self/mountinfo \
--table-columns ID,PARENT,MAJMIN,ROOT,TARGET,VFS-OPTS,PROP,SEP,TYPE,SOURCE,FS-OPTS \
--table-hide=SEP,ID,PARENT,ROOT,PROP,FS-OPTS,MAJMIN \
--table-order TARGET,SOURCE,TYPE,VFS-OPTS \
--tree TARGET \
--tree-id ID \
--tree-parent PARENT
TARGET SOURCE TYPE VFS-OPTS
/ /dev/sda4 ext4 rw,relatime
├─/sys sysfs sysfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/kernel/security securityfs securityfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/fs/cgroup tmpfs tmpfs ro,nosuid,nodev,noexec
│ │ ├─/sys/fs/cgroup/systemd cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/blkio cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/cpu,cpuacct cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/devices cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/hugetlb cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/pids cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/memory cgroup cgroup rw,nosuid,nodev,noexec,relatime
│ │ ├─/sys/fs/cgroup/cpuset cgroup cgroup rw,nosuid,nodev,noexec,relatime
<...and so on...>
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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