03-27-2002
Have you try the id command ?
id [-gnruG] [--group] [--name] [--real] [--user] [--groups] [--help] [--version] [username]
By default, it prints the real user ID, real group ID, effective user ID if different from the real user ID, effective group ID if dif ferent from the real group ID, and supplemental group IDs. It prints each of these values preceded by a string identifying it and followed by the corresponding user or group name in parentheses. Post back if this doesnt help..
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LEARN ABOUT OPENSOLARIS
setregid
setregid(2) System Calls setregid(2)
NAME
setregid - set real and effective group IDs
SYNOPSIS
#include <unistd.h>
int setregid(gid_t rgid, gid_t egid);
DESCRIPTION
The setregid() function is used to set the real and effective group IDs of the calling process. If rgid is -1, the real group ID is not
changed; if egid is -1, the effective group ID is not changed. The real and effective group IDs may be set to different values in the same
call.
If the {PRIV_PROC_SETID} privilege is asserted in the effective set of the calling process, the real group ID and the effective group ID
can be set to any legal value.
If the {PRIV_PROC_SETID} privilege is not asserted in the effective set of the calling process, either the real group ID can be set to the
saved set-group-ID from execve(2), or the effective group ID can either be set to the saved set-group-ID or the real group ID.
In either case, if the real group ID is being changed (that is, if rgid is not -1), or the effective group ID is being changed to a value
not equal to the real group ID, the saved set-group-ID is set equal to the new effective group ID.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned, errno is set to indicate the error, and neither of the group IDs will
be changed.
ERRORS
The setregid() function will fail if:
EINVAL The value of rgid or egid is less than 0 or greater than UID_MAX (defined in <limits.h>).
EPERM The {PRIV_PROC_SETID} privilege is not asserted in the effective set of the calling processes and a change was specified other
than changing the real group ID to the saved set-group-ID or changing the effective group ID to the real group ID or the saved
group ID.
USAGE
If a set-group-ID process sets its effective group ID to its real group ID, it can still set its effective group ID back to the saved set-
group-ID.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
execve(2), getgid(2), setreuid(2), setuid(2), attributes(5), privileges(5), standards(5)
SunOS 5.11 22 Mar 2004 setregid(2)