Can the Unix list command ls output numerical chmod permissions

Question

Is it possible when listing a directory to view numerical unix permissions such as 644 rather than the symbolic output -rw-rw-r--  Thanks

User · Accepted Answer

it almost can      ls -l   awk   k 0 for i 0 i lt  8 i   k    substr  1 i 2 1    rwx                    2  8-i   if k printf   0o   k  print

User · Answer

Closest I can think of  keeping it simple enough  is stat  assuming you know which files you re looking for   If you don t    can find most of them    usr bin  stat -c   a  n    755   755 a2p 755 a2ps 755 aclocal       It handles sticky  suid and company out of the box     stat -c   a  n   tmp  usr bin sudo 1777  tmp 4755  usr bin sudo

User · Answer

The MYYN  wow  nice awk  But what about suid  sgid and sticky bit    You have to extend your filter with s and t  otherwise they will not count and you get the wrong result  To calculate the octal number for this special flags  the procedure is the same but the index is at 4 7 and 10  the possible flags for files with execute bit set are ---s--s--t amd for files with no execute bit set are ---S--S--T  ls -l   awk        k   0     s   0     for  i   0  i  lt   8  i                   k        substr   1  i 2  1       rwxst       2    8 - i               j   4      for  i   4  i  lt   10  i    3                 s        substr   1  i  1       stST       j           j  2           if   k                 printf    0o 0o    s  k             print        For test   touch blah chmod 7444 blah   will result in   7444 -r-Sr-Sr-T 1 cheko cheko   0 2009-12-05 01 03 blah   and  touch blah chmod 7555 blah   will give   7555 -r-sr-sr-t 1 cheko cheko   0 2009-12-05 01 03 blah

User · Answer

Building off of the chosen answer and the suggestion to use an alias  I converted it to a function so that passing a directory to list is possible     ls  with chmod-like permissions and more     param  1 The directory to ls function lls     LLS PATH  1    ls -AHl  LLS PATH   awk   k 0 for i 0 i lt  8 i   k    substr   1 i 2 1    rwx                                   2  8-i   if k printf    0o    k  print

User · Answer

You don t use ls to get a file s permission information   You use the stat command   It will give you the numerical values you want    The  Unix Way  says that you should invent your own script using ls  or  echo     and stat and whatever else you like to give the information in the format you desire

User · Answer

Use this to display the Unix numerical permission values  octal values  and file name   stat -c   a  n      Use this to display the Unix numerical permission values  octal values  and the folder s sgid and sticky bit  user name of the owner  group name  total size in bytes and file name   stat -c   a  A  U  G  s  n        Add  y if you need time of last modification in human-readable format  For more options see stat   Better version using an Alias  Using an alias is a more efficient way to accomplish what you need and it also includes color  The following displays your results organized by group directories first  display in color  print sizes in human readable format  e g   1K 234M 2G  edit your    bashrc and add an alias for your account or globally by editing  etc profile d custom sh   Typing cls displays your new LS command results   alias cls  ls -lha --color always -F --group-directories-first  awk   k 0 s 0 for i 0 i lt  8 i     k    substr   1 i 2 1    rwxst    2  8-i     j 4 for i 4 i lt  10 i  3   s    substr   1 i 1    stST    j  j  2   if k   printf    0o 0o    s k    print         Folder Tree  While you are editing your bashrc or custom sh include the following alias to see a graphical representation where typing lstree will display your current folder tree structure  alias lstree  ls -R   grep        sed -e  s       -e  s   -          -- g  -e  s         -e  s -        It would display        -scripts     --mod cache disk     --mod cache d     ---logs     -run win     -scripts tar gz

User · Answer

Considering the question specifies UNIX  not Linux  use of a stat binary is not necessary   The solution below works on a very old UNIX  though a shell other than sh  i e  bash  was necessary   It is a derivation of glenn jackman s perl stat solution   It seems like an alternative worth exploring for conciseness    alias lls  llsfn      while test    -gt 0  do perl -s -e          fields   stat  quot  f quot   printf  quot  04o t quot    fields 2   amp  07777           -- -f  1  ls -ld  1  shift  done  unset -f llsf     llsfn    lls  tmp  etc resolv conf 1777    drwxrwxrwt   7 sys      sys       246272 Nov  5 15 10  tmp 0644    -rw-r--r--   1 bin      bin           74 Sep 20 23 48  etc resolv conf  The alias was developed using information in this answer The whole answer is a modified version of a solution in this answer

User · Answer

You can use the following command  stat -c   a  n      Also you can use any filename or directoryname instead of   to get a specific result   On Mac  you can use   stat -f   A  N

User · Answer

you can just use GNU find   find   -printf   m  f n

[unix] Can the Unix list command 'ls' output numerical chmod permissions?

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