utmp.c revision 1.3.2.4
1 1.3.2.4 thorpej /* $NetBSD: utmp.c,v 1.3.2.4 2002/12/10 06:25:49 thorpej Exp $ */ 2 1.3.2.2 nathanw 3 1.3.2.2 nathanw /*- 4 1.3.2.2 nathanw * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 1.3.2.2 nathanw * All rights reserved. 6 1.3.2.2 nathanw * 7 1.3.2.2 nathanw * This code is derived from software contributed to The NetBSD Foundation 8 1.3.2.2 nathanw * by Christos Zoulas. 9 1.3.2.2 nathanw * 10 1.3.2.2 nathanw * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 nathanw * modification, are permitted provided that the following conditions 12 1.3.2.2 nathanw * are met: 13 1.3.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 nathanw * documentation and/or other materials provided with the distribution. 18 1.3.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 19 1.3.2.2 nathanw * must display the following acknowledgement: 20 1.3.2.2 nathanw * This product includes software developed by the NetBSD 21 1.3.2.2 nathanw * Foundation, Inc. and its contributors. 22 1.3.2.2 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.3.2.2 nathanw * contributors may be used to endorse or promote products derived 24 1.3.2.2 nathanw * from this software without specific prior written permission. 25 1.3.2.2 nathanw * 26 1.3.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.3.2.2 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.3.2.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.3.2.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.3.2.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.3.2.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.3.2.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.3.2.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.3.2.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.3.2.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.3.2.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 37 1.3.2.2 nathanw */ 38 1.3.2.2 nathanw #include <sys/cdefs.h> 39 1.3.2.2 nathanw 40 1.3.2.2 nathanw #if defined(LIBC_SCCS) && !defined(lint) 41 1.3.2.4 thorpej __RCSID("$NetBSD: utmp.c,v 1.3.2.4 2002/12/10 06:25:49 thorpej Exp $"); 42 1.3.2.2 nathanw #endif /* LIBC_SCCS and not lint */ 43 1.3.2.2 nathanw 44 1.3.2.2 nathanw #include <sys/types.h> 45 1.3.2.2 nathanw #include <sys/param.h> 46 1.3.2.2 nathanw #include <stdio.h> 47 1.3.2.3 nathanw #include <string.h> 48 1.3.2.2 nathanw #include <time.h> 49 1.3.2.2 nathanw #include <utmp.h> 50 1.3.2.2 nathanw 51 1.3.2.2 nathanw static struct utmp utmp; 52 1.3.2.2 nathanw static FILE *ut; 53 1.3.2.2 nathanw static char utfile[MAXPATHLEN] = _PATH_UTMP; 54 1.3.2.2 nathanw 55 1.3.2.2 nathanw void 56 1.3.2.2 nathanw setutent(void) 57 1.3.2.2 nathanw { 58 1.3.2.2 nathanw if (ut == NULL) 59 1.3.2.2 nathanw return; 60 1.3.2.2 nathanw (void)fseeko(ut, (off_t)0, SEEK_SET); 61 1.3.2.2 nathanw } 62 1.3.2.2 nathanw 63 1.3.2.2 nathanw struct utmp * 64 1.3.2.2 nathanw getutent(void) 65 1.3.2.2 nathanw { 66 1.3.2.2 nathanw if (ut == NULL) { 67 1.3.2.2 nathanw if ((ut = fopen(utfile, "r")) == NULL) 68 1.3.2.2 nathanw return NULL; 69 1.3.2.2 nathanw } 70 1.3.2.2 nathanw if (fread(&utmp, sizeof(utmp), 1, ut) == 1) 71 1.3.2.2 nathanw return &utmp; 72 1.3.2.2 nathanw return NULL; 73 1.3.2.2 nathanw } 74 1.3.2.2 nathanw 75 1.3.2.2 nathanw void 76 1.3.2.2 nathanw endutent(void) 77 1.3.2.2 nathanw { 78 1.3.2.2 nathanw if (ut != NULL) { 79 1.3.2.2 nathanw (void)fclose(ut); 80 1.3.2.2 nathanw ut = NULL; 81 1.3.2.2 nathanw } 82 1.3.2.2 nathanw } 83 1.3.2.2 nathanw 84 1.3.2.2 nathanw int 85 1.3.2.2 nathanw utmpname(const char *fname) 86 1.3.2.2 nathanw { 87 1.3.2.2 nathanw size_t len = strlen(fname); 88 1.3.2.2 nathanw 89 1.3.2.2 nathanw if (len >= sizeof(utfile)) 90 1.3.2.2 nathanw return 0; 91 1.3.2.2 nathanw 92 1.3.2.2 nathanw /* must not end in x! */ 93 1.3.2.2 nathanw if (fname[len - 1] == 'x') 94 1.3.2.2 nathanw return 0; 95 1.3.2.2 nathanw 96 1.3.2.4 thorpej (void)strlcpy(utfile, fname, sizeof(utfile)); 97 1.3.2.2 nathanw endutent(); 98 1.3.2.2 nathanw return 1; 99 1.3.2.2 nathanw } 100
Indexes created Tue Sep 30 20:09:53 GMT 2025