i have a linked list set up like
typedef struct client_list {
char *client_name;
int client_socket_fd;
struct client_list *next;
} client;
client *client_list=NULL;
before adding to the list i check if it already exists, only if it does not then i add
if (client_list==NULL... (1 Reply)
can someone provide an example of a struct linked list, where it has strings as its values, and then how do I check if a specific string (say called buffer) exists in the list of structs?
i dont understand how to make a copy of it to check with
this is what i have
... (0 Replies)
Hi, I am programming in kernel, and I want to use a double linked list that holds infos that every process could access and modify THIS list. So, I suppose it is a 'global' variable since every process(thread) can reach it, I am wondering where to put it? by changing some of the kernel files? (1 Reply)
Program to reverse a linked list by traversing only once. (1 Reply)
Discussion started by: VSSajjan
1 Replies
LEARN ABOUT REDHAT
set_session_authorization
SET SESSION AUTHORIZATION(7) SQL Commands SET SESSION AUTHORIZATION(7)NAME
SET SESSION AUTHORIZATION - set the session user identifier and the current user identifier of the current session
SYNOPSIS
SET [ SESSION | LOCAL ] SESSION AUTHORIZATION username
SET [ SESSION | LOCAL ] SESSION AUTHORIZATION DEFAULT
RESET SESSION AUTHORIZATION
DESCRIPTION
This command sets the session user identifier and the current user identifier of the current SQL-session context to be username. The user
name may be written as either an identifier or a string literal. The session user identifier is valid for the duration of a connection;
for example, it is possible to temporarily become an unprivileged user and later switch back to become a superuser.
The session user identifier is initially set to be the (possibly authenticated) user name provided by the client. The current user identi-
fier is normally equal to the session user identifier, but may change temporarily in the context of ``setuid'' functions and similar mecha-
nisms. The current user identifier is relevant for permission checking.
The session user identifier may be changed only if the initial session user (the authenticated user) had the superuser privilege. Other-
wise, the command is accepted only if it specifies the authenticated user name.
The SESSION and LOCAL modifiers act the same as for the regular SET [set(7)] command.
The DEFAULT and RESET forms reset the session and current user identifiers to be the originally authenticated user name. These forms are
always accepted.
EXAMPLES
SELECT SESSION_USER, CURRENT_USER;
current_user | session_user
--------------+--------------
peter | peter
SET SESSION AUTHORIZATION 'paul';
SELECT SESSION_USER, CURRENT_USER;
current_user | session_user
--------------+--------------
paul | paul
COMPATIBILITY
SQL99
SQL99 allows some other expressions to appear in place of the literal username which are not important in practice. PostgreSQL allows iden-
tifier syntax ("username"), which SQL does not. SQL does not allow this command during a transaction; PostgreSQL does not make this
restriction because there is no reason to. The privileges necessary to execute this command are left implementation-defined by the stan-
dard.
SQL - Language Statements 2001-04-21 SET SESSION AUTHORIZATION(7)