/* $NetBSD: utmp.c,v 1.4 2002/08/01 23:46:37 nathanw Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: utmp.c,v 1.4 2002/08/01 23:46:37 nathanw Exp $"); #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include static struct utmp utmp; static FILE *ut; static char utfile[MAXPATHLEN] = _PATH_UTMP; void setutent(void) { if (ut == NULL) return; (void)fseeko(ut, (off_t)0, SEEK_SET); } struct utmp * getutent(void) { if (ut == NULL) { if ((ut = fopen(utfile, "r")) == NULL) return NULL; } if (fread(&utmp, sizeof(utmp), 1, ut) == 1) return &utmp; return NULL; } void endutent(void) { if (ut != NULL) { (void)fclose(ut); ut = NULL; } } int utmpname(const char *fname) { size_t len = strlen(fname); if (len >= sizeof(utfile)) return 0; /* must not end in x! */ if (fname[len - 1] == 'x') return 0; (void)strcpy(utfile, fname); endutent(); return 1; }