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4e51bba217
================ 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.
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
/* init.c - initialize shell backend */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
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#include <ac/unistd.h>
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#include "slap.h"
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#include "shell.h"
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#ifdef SLAPD_SHELL_DYNAMIC
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int back_shell_LTX_init_module(int argc, char *argv[]) {
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BackendInfo bi;
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memset( &bi, '\0', sizeof(bi) );
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bi.bi_type = "shell";
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bi.bi_init = shell_back_initialize;
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backend_add(&bi);
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return 0;
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}
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#endif /* SLAPD_SHELL_DYNAMIC */
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int
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shell_back_initialize(
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BackendInfo *bi
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)
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{
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bi->bi_open = 0;
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bi->bi_config = 0;
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bi->bi_close = 0;
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bi->bi_destroy = shell_back_destroy;
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bi->bi_db_init = shell_back_db_init;
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bi->bi_db_config = shell_back_db_config;
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bi->bi_db_open = 0;
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bi->bi_db_close = 0;
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bi->bi_db_destroy = shell_back_db_destroy;
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bi->bi_op_bind = shell_back_bind;
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bi->bi_op_unbind = shell_back_unbind;
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bi->bi_op_search = shell_back_search;
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bi->bi_op_compare = shell_back_compare;
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bi->bi_op_modify = shell_back_modify;
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bi->bi_op_modrdn = shell_back_modrdn;
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bi->bi_op_add = shell_back_add;
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bi->bi_op_delete = shell_back_delete;
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bi->bi_op_abandon = shell_back_abandon;
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bi->bi_extended = 0;
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bi->bi_acl_group = 0;
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bi->bi_acl_attribute = 0;
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bi->bi_chk_referrals = 0;
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bi->bi_connection_init = 0;
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bi->bi_connection_destroy = 0;
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#ifdef SHELL_SURROGATE_PARENT
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ldap_pvt_thread_mutex_init( &shell_surrogate_index_mutex );
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ldap_pvt_thread_mutex_init( &shell_surrogate_fd_mutex[0] );
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ldap_pvt_thread_mutex_init( &shell_surrogate_fd_mutex[1] );
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#endif
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return 0;
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}
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int
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shell_back_destroy(
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BackendInfo *bi
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)
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{
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#ifdef SHELL_SURROGATE_PARENT
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ldap_pvt_thread_mutex_destroy( &shell_surrogate_index_mutex );
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ldap_pvt_thread_mutex_destroy( &shell_surrogate_fd_mutex[0] );
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ldap_pvt_thread_mutex_destroy( &shell_surrogate_fd_mutex[1] );
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if ( shell_surrogate_fd[0] >= 0 ) {
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close( shell_surrogate_fd[0] );
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close( shell_surrogate_fd[1] );
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}
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if ( shell_surrogate_pid >= 0 )
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kill( shell_surrogate_pid, SIGTERM );
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#endif
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return 0;
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}
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int
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shell_back_db_init(
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Backend *be
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)
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{
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struct shellinfo *si;
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#ifdef SHELL_SURROGATE_PARENT
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if ( shell_surrogate_fd[0] < 0 )
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make_surrogate_parent();
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#endif
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si = (struct shellinfo *) ch_calloc( 1, sizeof(struct shellinfo) );
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be->be_private = si;
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return si == NULL;
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}
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int
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shell_back_db_destroy(
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Backend *be
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)
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{
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free( be->be_private );
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return 0;
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}
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