04-16-2009
Access control lists
Take a look at Access Control Lists - 'setfacl'. This does what zxmaus has suggested by putting extended permissions on files/directories.
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LEARN ABOUT HPUX
setgroups
setgroups(2) System Calls Manual setgroups(2)
NAME
setgroups - set group access list
SYNOPSIS
DESCRIPTION
sets the group access list of the current user process according to the array gidset. The parameter ngroups indicates the number of
entries in the array and must be no more than
Only a user with the privilege can set new groups by adding to the group access list of the current user process; any user can delete
groups from it.
Security Restrictions
Some or all of the actions associated with this system call require the privilege. Processes owned by the superuser have this privilege.
Processes owned by other users may have this privilege, depending on system configuration. See privileges(5) for more information about
privileged access on systems that support fine-grained privileges.
RETURN VALUE
Upon successful completion, returns 0; otherwise it returns -1 and sets to indicate the error.
ERRORS
fails if any of the following conditions are encountered:
The caller is not a user with the privilege and has attempted to set new groups.
The address specified for
gidset is outside the process address space. The reliable detection of this error is implementation dependent.
ngroups is greater than or not positive.
An entry in gidset is not a valid group ID.
AUTHOR
was developed by the University of California, Berkeley.
SEE ALSO
getgroups(2), initgroups(3C), privileges(5).
STANDARDS CONFORMANCE
setgroups(2)