usr.sbin/pw/pw_log.c

   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  * $FreeBSD: src/usr.sbin/pw/pw_log.c,v 1.5.2.1 2000/06/28 19:19:04 ache Exp $
  27  * $DragonFly: src/usr.sbin/pw/pw_log.c,v 1.2 2003/06/17 04:30:02 dillon Exp $
  28  */
  29
  30 #include <fcntl.h>
  31
  32 #include "pw.h"
  33
  34 static FILE    *logfile = NULL;
  35
  36 void
  37 pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
  38 {
  39         if (cnf->logfile && *cnf->logfile) {
  40                 if (logfile == NULL) {  /* With umask==0 we need to control file access modes on create */
  41                         int             fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
  42
  43                         if (fd != -1)
  44                                 logfile = fdopen(fd, "a");
  45                 }
  46                 if (logfile != NULL) {
  47                         va_list         argp;
  48                         int             l;
  49                         time_t          now = time(NULL);
  50                         struct tm      *t = localtime(&now);
  51                         char            nfmt[256];
  52                         char           *name;
  53
  54                         if ((name = getenv("LOGNAME")) == NULL && (name = getenv("USER")) == NULL)
  55                                 name = "unknown";
  56                         /* ISO 8601 International Standard Date format */
  57                         strftime(nfmt, sizeof nfmt, "%Y-%m-%d %T ", t);
  58                         l = strlen(nfmt);
  59                         sprintf(nfmt + strlen(nfmt), "[%s:%s%s] %s\n", name, Which[which], Modes[mode], fmt);
  60                         va_start(argp, fmt);
  61                         vfprintf(logfile, nfmt, argp);
  62                         va_end(argp);
  63                         fflush(logfile);
  64                 }
  65         }
  66 }