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Code cleanup of user name and user id handling in the backend. The current

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user is now defined in terms of the user id, the user name is only computed
upon request (for display purposes). This is kind of the opposite of the
previous state, which would maintain the user name and compute the user id
for permission checks.

Besides perhaps saving a few cycles (integer vs string), this now creates a
single point of attack for changing the user id during a connection, for
purposes of "setuid" functions, etc.
This commit is contained in:
Peter Eisentraut
2000-09-06 14:15:31 +00:00
parent daf1e3a702
commit 6dc249610a
28 changed files with 220 additions and 281 deletions
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27
src/backend/utils/init/postinit.c
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@ -8,19 +8,19 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.64 2000/08/06 04:39:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.65 2000/09/06 14:15:22 petere Exp $
*
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <fcntl.h>
#include <sys/file.h>
#include <sys/types.h>
#include <math.h>
#include <unistd.h>
#include "postgres.h"
#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/pg_database.h"
@ -223,7 +223,7 @@ int lockingOff = 0; /* backend -L switch */
/*
*/
void
InitPostgres(const char *dbname)
InitPostgres(const char *dbname, const char *username)
{
bool bootstrap = IsBootstrapProcessingMode();
@ -366,17 +366,20 @@ InitPostgres(const char *dbname)
/* replace faked-up relcache entries with the real info */
RelationCacheInitializePhase2();
/*
* Set ourselves to the proper user id and figure out our postgres
* user id. If we ever add security so that we check for valid
* postgres users, we might do it here.
*/
setuid(geteuid());
SetUserId();
if (lockingOff)
LockDisable(true);
/*
* Set ourselves to the proper user id and figure out our postgres
* user id.
*/
if (bootstrap)
SetUserId(geteuid());
else
SetUserIdFromUserName(username);
setuid(geteuid());
/*
* Unless we are bootstrapping, double-check that InitMyDatabaseInfo()
* got a correct result. We can't do this until essentially all the