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/*
* Copyright (c) 1989 - 1992, Julianne Frances Haugh
* Copyright (c) 1996 - 2000, Marek Michałkiewicz
* Copyright (c) 2001 - 2005, Tomasz Kłoczko
* Copyright (c) 2008 - 2010, Nicolas François
* All rights reserved.
*
* 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. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDERS 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 <config.h>
#ident "$Id$"
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <time.h>
#include "prototypes.h"
#include "defines.h"
#include "getdef.h"
/*
* sulog - log a SU command execution result
*/
void sulog (const char *tty, bool success, const char *oldname, const char *name)
{
const char *sulog_file;
time_t now;
struct tm *tm;
FILE *fp;
mode_t oldmask;
gid_t oldgid = 0;
if (success) {
SYSLOG ((LOG_INFO,
"Successful su for %s by %s",name,oldname));
} else {
SYSLOG ((LOG_NOTICE,
"FAILED su for %s by %s",name,oldname));
}
sulog_file = getdef_str ("SULOG_FILE");
if (NULL == sulog_file) {
return;
}
oldgid = getgid ();
oldmask = umask (077);
/* Switch to group root to avoid creating the sulog file with
* the wrong group ownership. */
if ((oldgid != 0) && (setgid (0) != 0)) {
SYSLOG ((LOG_INFO,
"su session not logged to %s", sulog_file));
/* Continue, but do not switch back to oldgid later */
oldgid = 0;
}
fp = fopen (sulog_file, "a+");
(void) umask (oldmask);
if ((oldgid != 0) && (setgid (oldgid) != 0)) {
perror ("setgid");
SYSLOG ((LOG_ERR,
"can't switch back to group `%d' in sulog",
oldgid));
/* Do not return if the group permission were raised. */
exit (EXIT_FAILURE);
}
if (fp == (FILE *) 0) {
return; /* can't open or create logfile */
}
(void) time (&now);
tm = localtime (&now);
fprintf (fp, "SU %.02d/%.02d %.02d:%.02d %c %s %s-%s\n",
tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min,
success ? '+' : '-', tty, oldname, name);
(void) fflush (fp);
fsync (fileno (fp));
fclose (fp);
/* TODO: log if failure */
}
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