chmod calculator

[kleo]

I would love to have a chmod calculator feature added to cheat.sh.

Something I have in mind:

curl cheat.sh/chmod/644

or

curl cheat.sh/chmod/-rw-r--r--

chmod u=rw,go=r / 644 / rw-r--r--

Linux Permissions:

Owner           Group           Public

Read    [X]     Read    [X]     Read    [X]
Write   [X]     Write   []      Write   []
Execute []      Execute []      Execute []

[chubin]

Very cool idea! It should be definitely implemented

[ErezBinyamin]

I like this idea a lot! I've written a script! You can pass a permission string rwx-wx--x or a value 731 and the output will be the same

Linux Permissions String:	rwx-wx--x
Linux Permissions Number:	731

Owner		Group		Public

Read    [X]	Read    [ ]	Read    [ ]
Write   [X]	Write   [X]	Write   [ ]
Execute [X]	Execute [X]	Execute [X]

[chubin]

@ErezBinyamin Erez, let's add this script to the adapters collection (share/adapters)
and activate it

[chubin]

Cool, it works!

What does not work, what could be improved:

• Input string format check (if it does not look like a format, the output must be like It does not look like Linux/UNIX access mode: $1
• Sticky bit, SGID, SUID support

The rest looks very cool

[chubin]

I've merged #205 but it is still wrong:

$ curl cht.sh/chmod/1777
Linux Permissions String:       rwtrwtrwt
Linux Permissions Number:       1777

Special         Owner           Group           Public

Setuid     [ ]  Read    [X]     Read    [X]     Read    [X]
Setgid     [ ]  Write   [X]     Write   [X]     Write   [X]
Sticky bit [X]  Execute [X]     Execute [X]     Execute [X]

It should be rwxrwxrwt, not rwtrwtrwt.

$ curl cht.sh/chmod/7777
Linux Permissions String:       rwtrwtrwt
Linux Permissions Number:       7777

Special         Owner           Group           Public

Setuid     [X]  Read    [X]     Read    [X]     Read    [X]
Setgid     [X]  Write   [X]     Write   [X]     Write   [X]
Sticky bit [X]  Execute [X]     Execute [X]     Execute [X]

It should be rwsrwsrwt. not rwtrwtrwt

[chubin]

I referenced the new adapter in the chmod cheat sheet:

$ curl cht.sh/chmod
...

$ curl cht.sh/chmod~curl
[ chmod ]
# Convert string representation of the access right
# into numeric form and back
curl cheat.sh/chmod/750
curl cheat.sh/chmod/rwxr-x---

[chubin]

It works now! Many thanks to @ErezBinyamin who implemented the adapter

[chubin]

@ErezBinyamin Just for your information,
the queries to the chmod adapter (chmod/ is removed from the query + they are grouped by 10 in a line):

0 000 0001 001 002 003 004 005 006 007
01 0111 022 0222 0333 044 0444 04755 0544 0555
0644 0711 0722 0733 0744 0755 0757 077 0777 0788
07s8 -1 1 10 100 1004 11 111 123 1234
1444 150 1531 1600 1644 1755 1760 1776 1777 1788
2 200 2004 222 2444 246 2531 2600 2755 2775
2777 3 333 3600 3644 3755 3777 4 400 4004
402 420 4206 42069 444 4444 4600 4701 4711 4744
4755 4777 4855 5 531 555 5600 5777 6 600
6000 6004 632 633 634 64 640 644 645 650
655 6644 666 6764 677 6777 69 6969 6969696 69696969
7 700 701 702 703 704 705 710 711 7111
7177 722 723 7277 731 732 733 7377 744 7477
74r 75 +++750 +750 750 751 752 753 7531 754
755 7555 755+Q 755Q 756 757 7577 758 760 764
7644 765 766 7666 7666000 77 772 775 7755 776
+777 777 777+ 7772 7775 +7777 7777 +77777 8 844
850 855 855s 855S 85s5 888 9 944 955 999
a
abbc
build.sh build-failure.sh
drwxr-xr-x
:learn
ls
number
options
permissions
-r--------
rw-r--r--
rws------
rwS------
rwsr-s--s
rwsr-s--t
rwsr-s--T
rwsrwSrwx
rwsrwxrwx
rwsr-xr-x
rwSr-xr-x
rwt------
+rwx
rwx------
rwxr-s--s
rwxr-T---
rwxr-T--s
rwxrw-rw-
+rwxrwrwx
rwxrwxrw-
rwxrwxrwx
rwxrwxr-x
rwxr-x---
rwxr-xr-t
rwxr-xr-x
rwx-wx--x
rx
r-xr-xr-x
S855
--version
-wS-wsr-S
-wxr-xrw-

Some of them are interesting ones.
For example :learn that cheat.sh by convention uses
for special "learn" pages.

For example. to learn Go (or Erlang) just do:

curl cheat.sh/go/:learn
curl cheat.sh/erlang/:learn

Maybe it is a good idea to write short introduction
about unix rights and permissions (or take it from the
internet) andmake it available via chmod/:learn