pw_log.c revision 22997 
1/*-
2 * Copyright (C) 1996
3 *	David L. Nugent.  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.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$Id$
27 */
28
29#include <fcntl.h>
30
31#include "pw.h"
32
33static FILE    *logfile = NULL;
34
35void
36pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
37{
38	if (cnf->logfile && *cnf->logfile) {
39		if (logfile == NULL) {	/* With umask==0 we need to control file access modes on create */
40			int             fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
41
42			if (fd != -1)
43				logfile = fdopen(fd, "a");
44		}
45		if (logfile != NULL) {
46			va_list         argp;
47			int             l;
48			time_t          now = time(NULL);
49			struct tm      *t = localtime(&now);
50			char            nfmt[256];
51			char           *name;
52
53			if ((name = getenv("LOGNAME")) == NULL && (name = getenv("USER")) == NULL)
54				name = "unknown";
55			strftime(nfmt, sizeof nfmt, "%d-%b-%Y %R ", t);
56			l = strlen(nfmt);
57			sprintf(nfmt + strlen(nfmt), "[%s:%s%s] %s\n", name, Which[which], Modes[mode], fmt);
58			va_start(argp, fmt);
59			vfprintf(logfile, nfmt, argp);
60			va_end(argp);
61			fflush(logfile);
62		}
63	}
64}
65