pw_log.c revision 20253 
1/*-
2 * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer as
10 *    the first lines of this file unmodified.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by David L. Nugent.
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	$Id$
33 */
34
35#include <fcntl.h>
36
37#include "pw.h"
38
39static FILE    *logfile = NULL;
40
41void
42pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
43{
44	if (cnf->logfile && *cnf->logfile) {
45		if (logfile == NULL) {	/* With umask==0 we need to control file access modes on create */
46			int             fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
47
48			if (fd != -1)
49				logfile = fdopen(fd, "a");
50		}
51		if (logfile != NULL) {
52			va_list         argp;
53			int             l;
54			time_t          now = time(NULL);
55			struct tm      *t = localtime(&now);
56			char            nfmt[256];
57			char           *name;
58
59			if ((name = getenv("LOGNAME")) == NULL && (name = getenv("USER")) == NULL)
60				name = "unknown";
61			strftime(nfmt, sizeof nfmt, "%d-%b-%Y %R ", t);
62			l = strlen(nfmt);
63			sprintf(nfmt + strlen(nfmt), "[%s:%s%s] %s\n", name, Which[which], Modes[mode], fmt);
64			va_start(argp, fmt);
65			vfprintf(logfile, nfmt, argp);
66			va_end(argp);
67			fflush(logfile);
68		}
69	}
70}
71