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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/* dynalib.c - dynamic library routines */
#include <stdio.h>
#include "prlink.h"
#include "slap.h"
#if defined(SOLARIS)
#include <dlfcn.h> /* dlerror */
#endif
static struct dynalib {
char *dl_name;
PRLibrary *dl_handle;
} **libs = NULL;
static void symload_report_error( char *libpath, char *symbol, char *plugin,
int libopen );
void *
sym_load( char *libpath, char *symbol, char *plugin, int report_errors )
{
return sym_load_with_flags(libpath, symbol, plugin, report_errors, PR_FALSE, PR_FALSE);
}
void *
sym_load_with_flags( char *libpath, char *symbol, char *plugin, int report_errors, PRBool load_now, PRBool load_global )
{
int i;
void *handle;
PRLibSpec libSpec;
unsigned int flags = PR_LD_LAZY; /* default PR_LoadLibrary flag */
libSpec.type = PR_LibSpec_Pathname;
libSpec.value.pathname = libpath;
for ( i = 0; libs != NULL && libs[i] != NULL; i++ ) {
if ( strcasecmp( libs[i]->dl_name, libpath ) == 0 ) {
handle = PR_FindSymbol( libs[i]->dl_handle, symbol );
if ( NULL == handle && report_errors ) {
symload_report_error( libpath, symbol, plugin, 1 /* lib open */ );
}
return handle;
}
}
if (load_now) {
flags = PR_LD_NOW;
}
if (load_global) {
flags |= PR_LD_GLOBAL;
}
if ( (handle = PR_LoadLibraryWithFlags( libSpec, flags )) == NULL ) {
if ( report_errors ) {
symload_report_error( libpath, symbol, plugin, 0 /* lib not open */ );
}
return( NULL );
}
libs = (struct dynalib **) slapi_ch_realloc( (char *) libs, (i + 2) *
sizeof(struct dynalib) );
libs[i] = (struct dynalib *) slapi_ch_malloc( sizeof(struct dynalib) );
libs[i]->dl_name = slapi_ch_strdup( libpath );
libs[i]->dl_handle = handle;
libs[ i + 1 ] = NULL;
handle = PR_FindSymbol( libs[i]->dl_handle, symbol );
if ( NULL == handle && report_errors ) {
symload_report_error( libpath, symbol, plugin, 1 /* lib open */ );
}
return handle;
}
static void
symload_report_error( char *libpath, char *symbol, char *plugin, int libopen )
{
char *errtext = NULL;
PRInt32 errlen, err;
errlen = PR_GetErrorTextLength();
if ( errlen > 0 ) {
errtext = slapi_ch_malloc( errlen );
if (( err = PR_GetErrorText( errtext )) > 0 ) {
LDAPDebug( LDAP_DEBUG_ANY, SLAPI_COMPONENT_NAME_NSPR " error %d: %s\n",
PR_GetError(), errtext, 0 );
}
slapi_ch_free( (void **)&errtext );
}
if ( libopen ) {
LDAPDebug( LDAP_DEBUG_ANY,
"Could not load symbol \"%s\" from \"%s\" for plugin %s\n",
symbol, libpath, plugin );
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"Could not open library \"%s\" for plugin %s\n",
libpath, plugin, 0 );
}
}
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