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/*
* SPDX-FileCopyrightText: 1989 - 1992, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
* SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#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 == NULL) {
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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