pw_log.c revision 267654 
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
27#ifndef lint
28static const char rcsid[] =
29  "$FreeBSD: releng/9.3/usr.sbin/pw/pw_log.c 61957 2000-06-22 16:48:41Z ache $";
30#endif /* not lint */
31
32#include <fcntl.h>
33
34#include "pw.h"
35
36static FILE    *logfile = NULL;
37
38void
39pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
40{
41	if (cnf->logfile && *cnf->logfile) {
42		if (logfile == NULL) {	/* With umask==0 we need to control file access modes on create */
43			int             fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
44
45			if (fd != -1)
46				logfile = fdopen(fd, "a");
47		}
48		if (logfile != NULL) {
49			va_list         argp;
50			int             l;
51			time_t          now = time(NULL);
52			struct tm      *t = localtime(&now);
53			char            nfmt[256];
54			char           *name;
55
56			if ((name = getenv("LOGNAME")) == NULL && (name = getenv("USER")) == NULL)
57				name = "unknown";
58			/* ISO 8601 International Standard Date format */
59			strftime(nfmt, sizeof nfmt, "%Y-%m-%d %T ", t);
60			l = strlen(nfmt);
61			sprintf(nfmt + strlen(nfmt), "[%s:%s%s] %s\n", name, Which[which], Modes[mode], fmt);
62			va_start(argp, fmt);
63			vfprintf(logfile, nfmt, argp);
64			va_end(argp);
65			fflush(logfile);
66		}
67	}
68}
69