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Script without read permission but execute the script

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# 1  
Old 01-06-2009
Script without read permission but execute the script
I have a script, except me no one can read the script but they can execute the script. Is it possible?
# 2  
Old 01-06-2009
No its not possible.
# 3  
Old 01-06-2009
I don't understand why impossible?

if the script's access permission is set as 411, whether the other users can execute the script?
# 4  
Old 01-06-2009
Quote:
Originally Posted by mosaic
I don't understand why impossible?

if the script's access permission is set as 411, whether the other users can execute the script?
Just 'x' perm is not enough to execute a script/bin both 'r' and 'x' are needed

It cannot run without reading it
# 5  
Old 01-06-2009
but i have tried on the platform AIX 5.3. it can be executed by another user in the same group. therefore i'm confused.
# 6  
Old 01-06-2009
I also think this is not possible. Here is a test on my linux machine:
Code:
root@bastila:~/work# cat hello.sh
#!/bin/sh

echo Hello
root@bastila:~/work# chmod 701 hello.sh
root@bastila:~/work# ls -l hello.sh
-rwx-----x 1 root root 22 2009-01-06 15:24 hello.sh
root@bastila:~/work# exit
exit
tsurko@bastila:~/work$ ./hello.sh
/bin/sh: Can't open ./hello.sh

# 7  
Old 01-06-2009
It is possible by using the suid bit. The script will be run under your id and not the user's one which might be risky though.
Code:
# cat hi.ksh
#!/bin/ksh -p
echo hello
# chmod 04711 hi.ksh
# ls -l hi.ksh
-rws--x--x   1 jlliagre root          25 janv  6 17:02 hi.ksh
# su guest
$ ./hi.ksh
hello
$ cat hi.ksh
cat: cannot open hi.ksh: Permission denied
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