1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 #include <sys/types.h>
  27 #include <sys/time.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <values.h>
  35 #include <locale.h>
  36 #include <sys/stat.h>
  37 #include <strings.h>
  38 #include <stdarg.h>
  39 #include <sys/param.h>
  40 #include <sys/nsctl/nsctl.h>
  41 
  42 #include <sys/unistat/spcs_s.h>
  43 #include <sys/unistat/spcs_s_u.h>
  44 #include <sys/unistat/spcs_errors.h>
  45 
  46 #define MAX_SESSION_LOG    (10 * 1024 * 1024)   /* allowable log file size */
  47 
  48 static char     sessionlog[]     =  "/var/adm/ds.log";
  49 static char     sessionlog_bak[] =  "/var/adm/ds.log.bak";
  50 
  51 static char *spcstime();
  52 
  53 void
  54 spcs_log(const char *product, spcs_s_info_t *status, const char *format, ...)
  55 {
  56         struct  stat st;
  57         FILE   *fp = NULL;
  58         struct flock lk;
  59         va_list ap;
  60 
  61         bzero(&lk, sizeof (lk));
  62 
  63         /*
  64          * check the file size, if > than MAX_SESSION_LOG bytes make a .bak
  65          * and truncate
  66          */
  67         if (stat(sessionlog, &st) == 0) {
  68                 if (st.st_size > MAX_SESSION_LOG) {
  69                         rename(sessionlog, sessionlog_bak);
  70                 }
  71         }
  72 
  73         va_start(ap, format);
  74         if ((fp = fopen(sessionlog, "a")) == (FILE *)NULL)
  75                 goto fail;
  76         lk.l_type = F_WRLCK;
  77         lk.l_whence = SEEK_SET;
  78         lk.l_start = (off_t)0;
  79         lk.l_len = (off_t)0;
  80 
  81         if (fcntl(fileno(fp), F_SETLKW, &lk) < 0)
  82                 goto fail;
  83 
  84 
  85         fprintf(fp, "%s %s: ", spcstime(), product);
  86         (void) vfprintf(fp, format, ap);
  87         fputs("\n", fp);
  88         if (status)
  89                 spcs_s_report(*status, fp);
  90 
  91         fflush(fp);
  92 
  93         lk.l_type = F_UNLCK;
  94 
  95         (void) fcntl(fileno(fp), F_SETLKW, &lk);
  96 
  97 fail:
  98         if (fp)
  99                 fclose(fp);
 100         va_end(ap);
 101 }
 102 
 103 /*
 104  * spcstime():  gets current time
 105  */
 106 static char *
 107 spcstime()
 108 {
 109         static char timeptr[20];
 110         time_t tnow;
 111 
 112         tnow = time((time_t *)0);
 113         cftime(timeptr, "%b %d %T", &tnow);
 114         return (timeptr);
 115 }