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/*-------------------------------------------------------------------------
*
* dynloader.c
* dynamic loader for HP-UX using the shared library mechanism
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/port/dynloader/hpux.c,v 1.22 2003/08/04 02:40:02 momjian Exp $
*
* NOTES
* all functions are defined here -- it's impossible to trace the
* shl_* routines from the bundled HP-UX debugger.
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
/* System includes */
#include <a.out.h>
#include "dl.h"
#include "dynloader.h"
#include "utils/dynamic_loader.h"
void *
pg_dlopen(char *filename)
{
/*
* Use BIND_IMMEDIATE so that undefined symbols cause a failure return
* from shl_load(), rather than an abort() later on when we attempt to
* call the library!
*/
shl_t handle = shl_load(filename,
BIND_IMMEDIATE | BIND_VERBOSE | DYNAMIC_PATH,
0L);
return (void *) handle;
}
PGFunction
pg_dlsym(void *handle, char *funcname)
{
PGFunction f;
if (shl_findsym((shl_t *) & handle, funcname, TYPE_PROCEDURE, &f) == -1)
f = (PGFunction) NULL;
return f;
}
void
pg_dlclose(void *handle)
{
shl_unload((shl_t) handle);
}
char *
pg_dlerror()
{
static char errmsg[] = "shl_load failed";
if (errno)
return strerror(errno);
return errmsg;
}
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