UNIX for Dummies Questions & Answers

I want group to run one of my unix script as me . I when the script is run it should have my permission's not the group .

I tried this :
1.Have a file called y.ksh

cat y.ksh
echo $LOGNAME >ak_test

2.Output file has this permission
-rwx------ ak_test

3.Then I chnaged the permission on the y.ksh like
this

chmod 4750 y.ksh

4. When I try to run y.ksh from other user id but member of same group . Script gives a error
ak_test can't create

Am i missing something on this or Is there any other way to achive this

I did looked into the other question on this forum .

Thanks
Ashok

Most of the modern operating systems do not support setuid shell scripts. So your script is still running with the your id and not the one that you want it to.

Please post the output of uname -a. Also the output of the command: ls -l y.ksh

I probably remember of reading somewhere that Sunos 5.7 onwards supports this

uname -a
SunOS acbusd1 5.9 Generic_118558-06 sun4u sparc SUNW,Sun-Fire-480R

ls -l y.ksh
-r-sr-x--- 1 akrathi acbudev 23 Oct 7 10:39 y.ksh

SunOS does support suid scripts. Howevet the exec must succeed. Read this thread.

SunOS may support setuid scripts, but many others dont - and with good reason too. Here are two sites that explain how setuid shell scripts can be used to gain root access.
How can I get setuid shell scripts to work?
Shell Scripting Languages (sh and csh Derivatives)

Sun is using the /dev/fd driver trick mentioned in your first link. This does not mean that suid shell scripts are safe....a secure script is hard to write. But running a script under sudo is almost as dangerous. All sudo can add is to protect the script from the environment and a good programmer will do that anyway.

That is true. But it is an undeniable fact that many times shell scripts that run with root privileges are necessary and as admins we just have to live with that.
Anyway, back to the OP's question.
According to the ownerships, the script will run as user akrathi. Now, what are the permissions on ak_test? Does the user akrathi have permissions to create/remove files in the directory where ak_test exists?
Check the output of ls -ld command on the directory where ak_test exists. If akrathi does not have permissions to write to the directory, you will not be able to create the ak_test file.