2010-01-13 17:29:55 +00:00
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/*-
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* Copyright (c) 2010 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <utmpx.h>
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#include "utxdb.h"
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#include "un-namespace.h"
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2012-03-23 08:26:31 +00:00
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#ifdef __NO_TLS
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2010-01-13 17:29:55 +00:00
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static FILE *uf = NULL;
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static int udb;
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2012-03-23 08:26:31 +00:00
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#else
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static _Thread_local FILE *uf = NULL;
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static _Thread_local int udb;
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#endif
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2010-01-13 17:29:55 +00:00
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int
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setutxdb(int db, const char *file)
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{
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struct stat sb;
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switch (db) {
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case UTXDB_ACTIVE:
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if (file == NULL)
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file = _PATH_UTX_ACTIVE;
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break;
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case UTXDB_LASTLOGIN:
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if (file == NULL)
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file = _PATH_UTX_LASTLOGIN;
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break;
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case UTXDB_LOG:
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if (file == NULL)
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file = _PATH_UTX_LOG;
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break;
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default:
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errno = EINVAL;
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return (-1);
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}
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if (uf != NULL)
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fclose(uf);
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uf = fopen(file, "r");
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if (uf == NULL)
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return (-1);
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2012-02-11 11:11:13 +00:00
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if (db != UTXDB_LOG) {
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/* Safety check: never use broken files. */
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if (_fstat(fileno(uf), &sb) != -1 &&
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sb.st_size % sizeof(struct futx) != 0) {
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fclose(uf);
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uf = NULL;
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errno = EFTYPE;
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return (-1);
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}
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/* Prevent reading of partial records. */
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(void)setvbuf(uf, NULL, _IOFBF,
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rounddown(BUFSIZ, sizeof(struct futx)));
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2010-01-13 17:29:55 +00:00
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}
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udb = db;
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return (0);
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}
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void
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setutxent(void)
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{
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setutxdb(UTXDB_ACTIVE, NULL);
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}
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void
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endutxent(void)
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{
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if (uf != NULL) {
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fclose(uf);
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uf = NULL;
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}
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}
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2010-01-17 21:40:05 +00:00
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static int
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getfutxent(struct futx *fu)
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2010-01-13 17:29:55 +00:00
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{
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if (uf == NULL)
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setutxent();
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if (uf == NULL)
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2010-01-17 21:40:05 +00:00
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return (-1);
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2010-01-13 17:29:55 +00:00
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if (udb == UTXDB_LOG) {
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uint16_t len;
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2011-02-19 11:31:56 +00:00
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if (fread(&len, sizeof(len), 1, uf) != 1)
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2010-01-17 21:40:05 +00:00
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return (-1);
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2010-01-13 17:29:55 +00:00
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len = be16toh(len);
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2010-01-17 21:40:05 +00:00
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if (len > sizeof *fu) {
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2010-01-13 17:29:55 +00:00
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/* Forward compatibility. */
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2011-02-19 11:31:56 +00:00
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if (fread(fu, sizeof(*fu), 1, uf) != 1)
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2010-01-17 21:40:05 +00:00
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return (-1);
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2011-02-19 11:31:56 +00:00
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fseek(uf, len - sizeof(*fu), SEEK_CUR);
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2010-01-13 17:29:55 +00:00
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} else {
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/* Partial record. */
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2011-02-19 11:31:56 +00:00
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memset(fu, 0, sizeof(*fu));
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2010-01-17 21:40:05 +00:00
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if (fread(fu, len, 1, uf) != 1)
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return (-1);
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2010-01-13 17:29:55 +00:00
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}
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} else {
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2011-02-19 11:31:56 +00:00
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if (fread(fu, sizeof(*fu), 1, uf) != 1)
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2010-01-17 21:40:05 +00:00
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return (-1);
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2010-01-13 17:29:55 +00:00
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}
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2010-01-17 21:40:05 +00:00
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return (0);
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2010-01-13 17:29:55 +00:00
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}
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struct utmpx *
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getutxent(void)
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{
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2010-01-17 21:40:05 +00:00
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struct futx fu;
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2010-01-13 17:29:55 +00:00
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2010-01-17 21:40:05 +00:00
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if (getfutxent(&fu) != 0)
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2010-01-13 17:29:55 +00:00
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return (NULL);
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2010-01-17 21:40:05 +00:00
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return (futx_to_utx(&fu));
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2010-01-13 17:29:55 +00:00
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}
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struct utmpx *
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getutxid(const struct utmpx *id)
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{
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2010-01-17 21:40:05 +00:00
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struct futx fu;
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2010-01-13 17:29:55 +00:00
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for (;;) {
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2010-01-17 21:40:05 +00:00
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if (getfutxent(&fu) != 0)
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2010-01-13 17:29:55 +00:00
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return (NULL);
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2010-01-17 21:40:05 +00:00
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switch (fu.fu_type) {
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2010-01-13 17:29:55 +00:00
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case USER_PROCESS:
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case INIT_PROCESS:
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case LOGIN_PROCESS:
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case DEAD_PROCESS:
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switch (id->ut_type) {
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case USER_PROCESS:
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case INIT_PROCESS:
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case LOGIN_PROCESS:
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case DEAD_PROCESS:
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2010-01-17 21:40:05 +00:00
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if (memcmp(fu.fu_id, id->ut_id,
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2011-02-19 11:31:56 +00:00
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MIN(sizeof(fu.fu_id), sizeof(id->ut_id))) ==
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0)
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2010-01-13 17:29:55 +00:00
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goto found;
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}
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2010-01-17 21:00:29 +00:00
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break;
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2010-01-17 21:40:05 +00:00
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default:
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if (fu.fu_type == id->ut_type)
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goto found;
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break;
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2010-01-13 17:29:55 +00:00
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}
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}
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found:
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2010-01-17 21:40:05 +00:00
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return (futx_to_utx(&fu));
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2010-01-13 17:29:55 +00:00
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}
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struct utmpx *
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getutxline(const struct utmpx *line)
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{
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2010-01-17 21:40:05 +00:00
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struct futx fu;
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2010-01-13 17:29:55 +00:00
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for (;;) {
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2010-01-17 21:40:05 +00:00
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if (getfutxent(&fu) != 0)
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2010-01-13 17:29:55 +00:00
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return (NULL);
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2010-01-17 21:40:05 +00:00
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switch (fu.fu_type) {
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2010-01-13 17:29:55 +00:00
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case USER_PROCESS:
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case LOGIN_PROCESS:
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2010-01-17 21:40:05 +00:00
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if (strncmp(fu.fu_line, line->ut_line,
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2011-02-19 11:31:56 +00:00
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MIN(sizeof(fu.fu_line), sizeof(line->ut_line))) ==
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0)
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2010-01-13 17:29:55 +00:00
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goto found;
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2010-01-17 21:40:05 +00:00
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break;
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2010-01-13 17:29:55 +00:00
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}
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}
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found:
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2010-01-17 21:40:05 +00:00
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return (futx_to_utx(&fu));
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2010-01-13 17:29:55 +00:00
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}
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struct utmpx *
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getutxuser(const char *user)
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{
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2010-01-17 21:40:05 +00:00
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struct futx fu;
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2010-01-13 17:29:55 +00:00
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for (;;) {
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2010-01-17 21:40:05 +00:00
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if (getfutxent(&fu) != 0)
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2010-01-13 17:29:55 +00:00
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return (NULL);
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2010-01-17 21:40:05 +00:00
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switch (fu.fu_type) {
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2010-01-13 17:29:55 +00:00
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case USER_PROCESS:
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2011-02-19 11:31:56 +00:00
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if (strncmp(fu.fu_user, user, sizeof(fu.fu_user)) == 0)
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2010-01-13 17:29:55 +00:00
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goto found;
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2010-01-17 21:40:05 +00:00
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break;
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2010-01-13 17:29:55 +00:00
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}
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}
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found:
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2010-01-17 21:40:05 +00:00
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return (futx_to_utx(&fu));
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2010-01-13 17:29:55 +00:00
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}
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