A simple utmpx implementation. Nothing uses it yet.
TODO: write the lastlog*() stuff.
This commit is contained in:
christos
parent
4ac6388b63
commit
510f6a45d4
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile.inc,v 1.109 2002/01/24 02:46:35 lukem Exp $
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# $NetBSD: Makefile.inc,v 1.110 2002/02/22 20:11:44 christos Exp $
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# from: @(#)Makefile.inc 8.6 (Berkeley) 5/4/95
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# gen sources
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@ -22,8 +22,9 @@ SRCS+= _errno.c alarm.c assert.c basename.c clock.c closedir.c \
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__signame14.c signame.c __sigsetops14.c sigsetops.c sleep.c \
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stringlist.c sysconf.c sysctl.c syslog.c telldir.c time.c times.c \
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timezone.c toascii.c tolower_.c ttyname.c ttyslot.c toupper_.c \
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ualarm.c ulimit.c uname.c unvis.c usleep.c utime.c valloc.c vis.c \
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wait.c wait3.c waitpid.c warn.c warnx.c vwarn.c vwarnx.c verr.c verrx.c
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ualarm.c ulimit.c uname.c unvis.c usleep.c utime.c utmpx.c valloc.c \
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vis.c wait.c wait3.c waitpid.c warn.c warnx.c vwarn.c vwarnx.c verr.c \
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verrx.c
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# indirect reference stubs, to be removed soon.
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SRCS+= _err.c _errx.c _sys_errlist.c _sys_nerr.c _sys_siglist.c \
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@ -0,0 +1,293 @@
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/* $NetBSD: utmpx.c,v 1.1 2002/02/22 20:11:44 christos Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: utmpx.c,v 1.1 2002/02/22 20:11:44 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <string.h>
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#include <vis.h>
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#include <utmpx.h>
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#include <unistd.h>
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static FILE *fp;
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static struct utmpx ut;
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static char utfile[MAXPATHLEN] = _PATH_UTMPX;
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static struct utmpx *utmp_update(const struct utmpx *);
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static const char vers[] = "utmpx-1.00";
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void
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setutxent()
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{
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(void)memset(&ut, 0, sizeof(ut));
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if (fp == NULL)
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return;
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(void)fseeko(fp, (off_t)sizeof(ut), SEEK_SET);
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}
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void
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endutxent()
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{
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(void)memset(&ut, 0, sizeof(ut));
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if (fp != NULL)
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(void)fclose(fp);
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}
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struct utmpx *
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getutxent()
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{
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if (fp == NULL) {
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struct stat st;
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if ((fp = fopen(utfile, "r+")) == NULL)
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if ((fp = fopen(utfile, "r")) == NULL)
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goto fail;
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/* get file size in order to check if new file */
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if (fstat(fileno(fp), &st) == -1)
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goto failclose;
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if (st.st_size == 0) {
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/* new file, add signature record */
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(void)memset(&ut, 0, sizeof(ut));
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ut.ut_type = SIGNATURE;
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(void)memcpy(ut.ut_name, vers, sizeof(vers));
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if (fwrite(&ut, sizeof(ut), 1, fp) != sizeof(ut))
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goto failclose;
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} else {
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/* old file, read signature record */
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if (fread(&ut, sizeof(ut), 1, fp) != sizeof(ut))
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goto failclose;
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if (memcmp(ut.ut_name, vers, sizeof(vers)) != 0 ||
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ut.ut_type != SIGNATURE)
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goto failclose;
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}
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}
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if (fread(&ut, sizeof(ut), 1, fp) != sizeof(ut))
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goto fail;
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return &ut;
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failclose:
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(void)fclose(fp);
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fail:
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(void)memset(&ut, 0, sizeof(ut));
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return NULL;
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}
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struct utmpx *
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getutxid(const struct utmpx *utx)
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{
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if (utx->ut_type == EMPTY)
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return NULL;
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do {
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if (ut.ut_type == EMPTY)
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continue;
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switch (utx->ut_type) {
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case EMPTY:
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return NULL;
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case RUN_LVL:
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case BOOT_TIME:
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case OLD_TIME:
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case NEW_TIME:
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if (ut.ut_type == utx->ut_type)
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return &ut;
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break;
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case INIT_PROCESS:
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case LOGIN_PROCESS:
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case USER_PROCESS:
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case DEAD_PROCESS:
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switch (ut.ut_type) {
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case INIT_PROCESS:
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case LOGIN_PROCESS:
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case USER_PROCESS:
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case DEAD_PROCESS:
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if (memcmp(ut.ut_id, utx->ut_id,
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sizeof(ut.ut_id)) == 0)
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return &ut;
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break;
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default:
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break;
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}
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break;
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default:
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return NULL;
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}
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}
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while (getutxent() != NULL);
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return NULL;
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}
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struct utmpx *
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getutxline(const struct utmpx *utx)
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{
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do {
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switch (ut.ut_type) {
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case EMPTY:
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break;
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case LOGIN_PROCESS:
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case USER_PROCESS:
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if (strncmp(ut.ut_line, utx->ut_line,
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sizeof(ut.ut_line)) == 0)
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return &ut;
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break;
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default:
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break;
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}
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}
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while (getutxent() != NULL);
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return NULL;
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}
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struct utmpx *
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pututxline(const struct utmpx *utx)
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{
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struct utmpx temp, *u = NULL;
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int gotlock = 0;
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if (strcmp(_PATH_UTMPX, utfile) == 0 && geteuid() != 0)
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return utmp_update(utx);
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if (utx == NULL)
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return NULL;
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(void)memcpy(&temp, utx, sizeof(temp));
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if (fp == NULL) {
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(void)getutxent();
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if (fp == NULL)
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return NULL;
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}
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if (getutxid(&temp) == NULL) {
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setutxent();
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if (getutxid(&temp) == NULL) {
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if (lockf(fileno(fp), F_LOCK, (off_t)0) == -1)
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return NULL;
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gotlock++;
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if (fseeko(fp, (off_t)0, SEEK_END) == -1)
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goto fail;
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}
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}
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if (!gotlock) {
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/* we are not appending */
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if (fseeko(fp, -(off_t)sizeof(ut), SEEK_CUR) == -1)
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return NULL;
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}
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if (fwrite(&temp, sizeof (temp), 1, fp) != 1)
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goto fail;
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if (fflush(fp) == -1)
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goto fail;
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u = memcpy(&ut, &temp, sizeof(ut));
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fail:
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if (gotlock) {
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if (lockf(fileno(fp), F_ULOCK, (off_t)0) == -1)
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return NULL;
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}
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return u;
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}
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static struct utmpx *
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utmp_update(const struct utmpx *utx)
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{
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char buf[sizeof(*utx) * 4 + 1];
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pid_t pid;
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int status;
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(void)strvisx(buf, (const char *)(const void *)utx, sizeof(*utx),
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VIS_WHITE);
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switch (pid = fork()) {
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case 0:
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(void)execl(_PATH_UTMP_UPDATE,
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strrchr(_PATH_UTMP_UPDATE, '/') + 1, buf);
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exit(1);
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/*NOTREACHED*/
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case -1:
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return NULL;
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default:
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if (waitpid(pid, &status, 0) == -1)
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return NULL;
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if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
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return memcpy(&ut, utx, sizeof(ut));
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return NULL;
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}
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}
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/*
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* The following are extensions and not part of the X/Open spec
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*/
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int
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utmpxname(const char *fname)
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{
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size_t len = strlen(fname);
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if (len >= sizeof(utfile))
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return 0;
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/* must end in x! */
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if (fname[len - 1] != 'x')
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return 0;
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(void)strcpy(utfile, fname);
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endutxent();
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return 1;
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}
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