File/directory information......

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# 22  
Old 01-08-2002

The problem was that using "tr" you need to specify the path of the command in order to execute. This is got to do with your PATH settings. I hope that helps a bit.
# 23  
Old 01-08-2002
Think I just got some where jimbo??

This is what i just did: on the promte line just typed:

echo "rwx" | /usr/bin/tr rwx 421

and it printed this:


How can I use this in my script to enable me to print the permissions of a file/directory numericaly?
# 24  
Old 01-08-2002
OK, admittedly this is very yucky, and you should never never do this, but in a pinch:
if [  -z "$1" ]; then exit 1; fi
p_a=`ls -ld $1 | cut -c1-10`
u_p=`echo $p_a | cut -c2-4`
g_p=`echo $p_a | cut -c5-7`
o_p=`echo $p_a | cut -c8-10`

# Owner
case `echo $u_p` in
rwx) u_n=7 ;;
rw-) u_n=6 ;;
r-x) u_n=5 ;;
r--) u_n=4 ;;
-wx) u_n=3 ;;
-w-) u_n=2 ;;
--x) u_n=1 ;;
---) u_n=0 ;;
*)   u_n=" ? " ;;

# Group
case `echo $g_p` in
rwx) g_n=7 ;;
rw-) g_n=6 ;;
r-x) g_n=5 ;;
r--) g_n=4 ;;
-wx) g_n=3 ;;
-w-) g_n=2 ;;
--x) g_n=1 ;;
---) g_n=0 ;;
*)   g_n=" ? " ;;

# Other
case `echo $o_p` in
rwx) o_n=7 ;;rw-) o_n=6 ;;
r-x) o_n=5 ;;
r--) o_n=4 ;;
-wx) o_n=3 ;;
-w-) o_n=2 ;;
--x) o_n=1 ;;
---) o_n=0 ;;
*)   o_n=" ? " ;;
if [ -d "$1" ]; then
        F_type=" regular directory"
elif [ -f "$1" ]; then
        F_type=" regular file"
        F_type="n unknown file type"

echo "$1 is a${F_type}, and has ${u_n}${g_n}${o_n} permissions."

Ick. It won't work for non-files or non-directories (for example, run it and give /dev/null as the file...), nor will it handle any"special" bits set on a file (sticky, setuid, etc...) - this is crude but simple.
# 25  
Old 01-08-2002
Going back to my original code, we just need to change tr to /usr/bin/tr. We will make it a script with filename as a parameter:

ls -ld ${1:?Need one parameter: a filename} |
cut -c2-10 |
/usr/bin/tr [-rwx] [0421] |
sed "s/./& /g" |
awk '{print $1+$2+$3 $4+$5+$6 $7+$8+$9}'

By default, you must have been using another version of tr. Do "which tr" to see. The /usr/bin/tr is working. The code:

1) does ls -ld somefilename
2) cuts the permissions out such as rwxrw-rw-
3) translates those into digits such as 421420420
4) separates with spaces such as 4 2 1 4 2 0 4 2 0
5) awk adds and prints them such as 766

Perseverance! Thanks for hanging in.
# 26  
Old 01-08-2002
I am runnig Solaris 5.6 and using the command line. The tr command is in /usr/bin.
# echo "-777" | tr '\-rwx' 0421

I also got this to work taking dashes into consideration. The permissions on this README file are 644:

# ls -l README | cut -c2-10 | tr '\-rwx' 0421
# 27  
Old 01-08-2002
I made this simple script to test wat u said jimbo:

print -n "Enter file name: "
read name
ls -ld $name |
cut -c2-10 |
/usr/bin/tr [-rwx] [0421] |
sed "s/./&/g" |
awk '{print $1+$2+$3+$4+$5+$6+$7+$8+$9}'

Comes up with a error message:
/usr/bin/tr: Bad string.

Doesn't seem iv soloved the problem, but these worked:
echo "-777" | tr '\-rwx' 0421

echo "rwx" | /usr/bin/tr rwx 421

Just tried this:
ls -l menu | cut -c2-10 | tr '\-rwx' 0421
which produced this outcome:
421000000 (which is correct)

but, when i tried this:
ls -l menu | cut -c2-10 | tr '\-rwx' 0421 | sed "s/./& /g" | awk '{print $1+$2+$3 $4+$5+$6 $7+$8+$9}'
421000000 which is the same as the above, seems that its not converting.

So, the problem is between:
sed "s/./& /g" |
awk '{print $1+$2+$3 $4+$5+$6 $7+$8+$9}'
those lines of code

Can ne1 help??
Smilie Smilie

Last edited by Makaveli.2003; 01-08-2002 at 05:38 PM..
# 28  
Old 01-08-2002
The problem now is with sed. As coded, for me that sed command will convert 421000000 to 4 2 1 0 0 0 0 0 0. If I come up with an alternate way to insert spaces between each character, I will let you know. In the meantime, since your PATH was getting to a problematic tr command, maybe you should try changing sed to /bin/sed (or whatever).
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