/* $NetBSD: lock.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $ */ /* lock.c - routines to open and apply an advisory lock to a file */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2019 The OpenLDAP Foundation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* Portions Copyright (c) 1995 Regents of the University of Michigan. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of Michigan at Ann Arbor. The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. This software * is provided ``as is'' without express or implied warranty. */ #include __RCSID("$NetBSD: lock.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $"); #include "portable.h" #include #include #include #include #include #ifdef HAVE_SYS_FILE_H #include #endif #include "slap.h" #include FILE * lock_fopen( const char *fname, const char *type, FILE **lfp ) { FILE *fp; char buf[MAXPATHLEN]; /* open the lock file */ snprintf( buf, sizeof buf, "%s.lock", fname ); if ( (*lfp = fopen( buf, "w" )) == NULL ) { Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", buf, 0, 0 ); return( NULL ); } /* acquire the lock */ ldap_lockf( fileno(*lfp) ); /* open the log file */ if ( (fp = fopen( fname, type )) == NULL ) { Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", fname, 0, 0 ); ldap_unlockf( fileno(*lfp) ); fclose( *lfp ); *lfp = NULL; return( NULL ); } return( fp ); } int lock_fclose( FILE *fp, FILE *lfp ) { int rc = fclose( fp ); /* unlock */ ldap_unlockf( fileno(lfp) ); fclose( lfp ); return( rc ); }