NAME tt_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 message 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 messsage. If the UID and/or GID of the application do not match that of the message then the receiving application should consider failing the message 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 ALSO tt_c(5), tt_message_uid(3).
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