12-28-2004
Set the group of the file that needs to be executed to the group used by the three users, and chmod the file to... 770.
example:
-wrxwrx--- root jgroup /usr/bin/tail
in /etc/group (your milage may vary)
be sure john, brad and dave are in group jgroup.
Change as needed.
`ps` will show which user has executed the file, but only root and those in the group will be able to use the file.
Cheers,
-Seg
ps: to log who used it create a script file to echo $user $tty `date` to a file then execute the process...
Quote:
#!/bin/csh
echo "$user $tty `date`" >> /var/log/jgroup.log
/usr/bin/jgroupfile
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CHOWN(2) System Calls Manual CHOWN(2)
NAME
chown - change owner and group of a file
SYNOPSIS
int chown(const char *path, int owner, int group)
DESCRIPTION
The file that is named by path has its owner and group changed as specified. Only the super-user may change the owner of the file, because
if users were able to give files away, they could defeat file-space accounting procedures. The owner of the file may change the group to a
group of which he is a member.
On some systems, chown clears the set-user-id and set-group-id bits on the file to prevent accidental creation of set-user-id and set-
group-id programs.
RETURN VALUE
Zero is returned if the operation was successful; -1 is returned if an error occurs, with a more specific error code being placed in the
global variable errno.
ERRORS
Chown will fail and the file will be unchanged if:
[ENOTDIR] A component of the path prefix is not a directory.
[ENAMETOOLONG] The path name exceeds PATH_MAX characters.
[ENOENT] The named file does not exist.
[EACCES] Search permission is denied for a component of the path prefix.
[ELOOP] Too many symbolic links were encountered in translating the pathname. (Minix-vmd)
[EPERM] The effective user ID is not the super-user.
[EROFS] The named file resides on a read-only file system.
[EFAULT] Path points outside the process's allocated address space.
[EIO] An I/O error occurred while reading from or writing to the file system.
SEE ALSO
chown(8), chgrp(1), chmod(2).
4th Berkeley Distribution May 22, 1986 CHOWN(2)