usr/src/cmd/saf/log.c

   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 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  27 /*        All Rights Reserved   */
  28
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/fcntl.h>
  35 #include <stdio.h>
  36 #include <unistd.h>
  37 #include <stdarg.h>
  38 #include <strings.h>
  39 #include <errno.h>
  40
  41 #include "extern.h"
  42 #include "misc.h"
  43 #include "msgs.h"
  44 #include <sac.h>
  45 #include "structs.h"
  46
  47 static  FILE    *Lfp;   /* log file */
  48 #ifdef DEBUG
  49 static  FILE    *Dfp;   /* debug file */
  50 #endif
  51
  52
  53 /*
  54  * cons_printf - emit a message to the system console
  55  */
  56
  57 /*PRINTFLIKE1*/
  58 static void
  59 cons_printf(const char *fmt, ...)
  60 {
  61         char buf[MAXPATHLEN * 2]; /* enough space for msg including a path */
  62         int fd;
  63         va_list ap;
  64
  65         va_start(ap, fmt);
  66         (void) vsnprintf(buf, sizeof (buf), fmt, ap);
  67         va_end(ap);
  68
  69         if ((fd = open("/dev/console", O_WRONLY|O_NOCTTY)) != -1)
  70                 (void) write(fd, buf, strlen(buf) + 1);
  71         (void) close(fd);
  72 }
  73
  74 /*
  75  * openlog - open log file, sets global file pointer Lfp
  76  */
  77
  78 void
  79 openlog()
  80 {
  81         if ((Lfp = fopen(LOGFILE, "a+")) == NULL) {
  82                 cons_printf("SAC: could not open logfile %s: %s\n",
  83                     LOGFILE, strerror(errno));
  84                 exit(1);
  85         }
  86
  87         /*
  88          * lock logfile to indicate presence
  89          */
  90         if (lockf(fileno(Lfp), F_LOCK, 0) < 0) {
  91                 cons_printf("SAC: could not lock logfile %s:%s\n",
  92                     LOGFILE, strerror(errno));
  93                 exit(1);
  94         }
  95 }
  96
  97
  98 /*
  99  * log - put a message into the log file
 100  *
 101  *      args:   msg - message to be logged
 102  */
 103 void
 104 log(char *msg)
 105 {
 106         char *timestamp;        /* current time in readable form */
 107         time_t clock;           /* current time in seconds */
 108         char buf[SIZE];         /* scratch buffer */
 109
 110         (void) time(&clock);
 111         timestamp = ctime(&clock);
 112         *(strchr(timestamp, '\n')) = '\0';
 113         (void) snprintf(buf, sizeof (buf), "%s; %ld; %s\n",
 114             timestamp, getpid(), msg);
 115         (void) fprintf(Lfp, buf);
 116         (void) fflush(Lfp);
 117 }
 118
 119
 120 /*
 121  * error - put an error message into the log file and exit if indicated
 122  *
 123  *      args:   msgid - id of message to be output
 124  *              action - action to be taken (EXIT or not)
 125  */
 126
 127
 128 void
 129 error(int msgid, int action)
 130 {
 131         if (msgid < 0 || msgid > N_msgs)
 132                 return;
 133         log(Msgs[msgid].e_str);
 134         if (action == EXIT) {
 135                 log("*** SAC exiting ***");
 136                 exit(Msgs[msgid].e_exitcode);
 137         }
 138 }
 139
 140
 141 #ifdef DEBUG
 142
 143 /*
 144  * opendebug - open debugging file, sets global file pointer Dfp
 145  */
 146
 147
 148 void
 149 opendebug()
 150 {
 151         FILE *fp;       /* scratch file pointer for problems */
 152
 153         if ((Dfp = fopen(DBGFILE, "a+")) == NULL) {
 154                 cons_printf("SAC: could not open debugfile %s: %s\n",
 155                     DBGFILE, strerror(errno));
 156                 exit(1);
 157         }
 158 }
 159
 160
 161 /*
 162  * debug - put a message into debug file
 163  *
 164  *      args:   msg - message to be output
 165  */
 166
 167
 168 void
 169 debug(char *msg)
 170 {
 171         char *timestamp;        /* current time in readable form */
 172         time_t clock;           /* current time in seconds */
 173         char buf[SIZE];         /* scratch buffer */
 174
 175         (void) time(&clock);
 176         timestamp = ctime(&clock);
 177         *(strchr(timestamp, '\n')) = '\0';
 178         (void) sprintf(buf, "%s; %ld; %s\n", timestamp, getpid(), msg);
 179         (void) fprintf(Dfp, buf);
 180         (void) fflush(Dfp);
 181 }
 182
 183 #endif /* DEBUG */