tt_message_gid(3) ToolTalk Functions tt_message_gid(3)NAMEtt_message_gid - retrieve the group identifier attribute from a message
SYNOPSIS
#include <Tt/tt_c.h>
gid_t tt_message_gid(Tt_message m);
DESCRIPTION
The tt_message_gid() function retrieves the group identifier attribute
from the specified message.
The ToolTalk service automatically sets the group identifier of a mes‐
sage with the group identifier of the process that created the message.
The m argument is the opaque handle for the message involved in this
operation.
The application should check the tt_message_uid(3) and tt_message_gid()
against the User ID and Group ID of the application receiving the mess‐
sage. If the UID and/or GID of the application do not match that of the
message then the receiving application should consider failing the mes‐
sage with TT_DESKTOP_EACCES.
RETURN VALUE
Upon successful completion, the tt_message_gid() function returns the
group identifier of the message. If the group nobody is returned, the
message handle is not valid.
SEE ALSOtt_c(5), tt_message_uid(3).
ToolTalk 1.3 1 March 1996 tt_message_gid(3)