openldap/servers/slapd/back-shell/unbind.c
Kurt Zeilenga 4e51bba217 Patch: Implement surrogate parent for back-shell (ITS#1815)
================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.
			================

A surrogate parent is supposed to keep back-shell children from
deadlocking due to resources locked by a threading parent.

Implementation note: The surrogate parent closes all unused file
descriptors, so it logs errors to stderr instead of via Debug() and
uses relloc() instead of ch_realloc().

Also close a file descriptor leak if fork() fails in fork.c.

Hallvard B. Furuseth <h.b.furuseth@usit.uio.no>, May 2002.
2002-05-15 06:18:14 +00:00

50 lines
1.0 KiB
C

/* unbind.c - shell backend unbind function */
/* $OpenLDAP$ */
/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include "slap.h"
#include "shell.h"
int
shell_back_unbind(
Backend *be,
Connection *conn,
Operation *op
)
{
struct shellinfo *si = (struct shellinfo *) be->be_private;
FILE *rfp, *wfp;
if ( IS_NULLCMD( si->si_unbind ) ) {
return 0;
}
if ( (op->o_private = (void *) forkandexec( si->si_unbind, &rfp, &wfp ))
== (void *) -1 ) {
return 0;
}
/* write out the request to the unbind process */
fprintf( wfp, "UNBIND\n" );
fprintf( wfp, "opid: %ld/%ld\n", op->o_connid, (long) op->o_msgid );
fprintf( wfp, "msgid: %ld\n", (long) op->o_msgid );
print_suffixes( wfp, be );
fprintf( wfp, "dn: %s\n", (conn->c_dn.bv_len ? conn->c_dn.bv_val : "") );
fclose( wfp );
/* no response to unbind */
fclose( rfp );
return 0;
}