62172f6fb5
In variadic functions we still do the cast. In POSIX, it's not necessary, since NULL is required to be of type 'void *', and 'void *' is guaranteed to have the same alignment and representation as 'char *'. However, since ISO C still doesn't mandate that, and moreover they're doing dubious stuff by adding nullptr, let's be on the cautious side. Also, C++ requires that NULL is _not_ 'void *', but either plain 0 or some magic stuff. Signed-off-by: Alejandro Colomar <alx@kernel.org>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
|
|
* 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 */
|
|
}
|
|
|