logger.tproj/logger.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1983, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #include <errno.h>
  58 #include <unistd.h>
  59 #include <stdlib.h>
  60 #include <stdio.h>
  61 #include <ctype.h>
  62 #include <string.h>
  63
  64 #define SYSLOG_NAMES
  65 #include <syslog.h>
  66
  67 int     decode __P((char *, CODE *));
  68 int     pencode __P((char *));
  69 void    usage __P((void));
  70
  71 /*
  72  * logger -- read and log utility
  73  *
  74  *      Reads from an input and arranges to write the result on the system
  75  *      log.
  76  */
  77 int
  78 main(argc, argv)
  79         int argc;
  80         char *argv[];
  81 {
  82         int ch, logflags, pri;
  83         char *tag, buf[1024];
  84
  85         tag = NULL;
  86         pri = LOG_NOTICE;
  87         logflags = 0;
  88         while ((ch = getopt(argc, argv, "f:ip:st:")) != -1)
  89                 switch((char)ch) {
  90                 case 'f':               /* file to log */
  91                         if (freopen(optarg, "r", stdin) == NULL) {
  92                                 (void)fprintf(stderr, "logger: %s: %s.\n",
  93                                     optarg, strerror(errno));
  94                                 exit(1);
  95                         }
  96                         break;
  97                 case 'i':               /* log process id also */
  98                         logflags |= LOG_PID;
  99                         break;
 100                 case 'p':               /* priority */
 101                         pri = pencode(optarg);
 102                         break;
 103                 case 's':               /* log to standard error */
 104                         logflags |= LOG_PERROR;
 105                         break;
 106                 case 't':               /* tag */
 107                         tag = optarg;
 108                         break;
 109                 case '?':
 110                 default:
 111                         usage();
 112                 }
 113         argc -= optind;
 114         argv += optind;
 115
 116         /* setup for logging */
 117         openlog(tag ? tag : getlogin(), logflags, 0);
 118         (void) fclose(stdout);
 119
 120         /* log input line if appropriate */
 121         if (argc > 0) {
 122                 register char *p, *endp;
 123                 int len;
 124
 125                 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
 126                         len = strlen(*argv);
 127                         if (p + len > endp && p > buf) {
 128                                 syslog(pri, "%s", buf);
 129                                 p = buf;
 130                         }
 131                         if (len > sizeof(buf) - 1)
 132                                 syslog(pri, "%s", *argv++);
 133                         else {
 134                                 if (p != buf)
 135                                         *p++ = ' ';
 136                                 bcopy(*argv++, p, len);
 137                                 *(p += len) = '\0';
 138                         }
 139                 }
 140                 if (p != buf)
 141                         syslog(pri, "%s", buf);
 142         } else
 143                 while (fgets(buf, sizeof(buf), stdin) != NULL)
 144                         syslog(pri, "%s", buf);
 145         exit(0);
 146 }
 147
 148 /*
 149  *  Decode a symbolic name to a numeric value
 150  */
 151 int
 152 pencode(s)
 153         register char *s;
 154 {
 155         char *save;
 156         int fac, lev;
 157
 158         for (save = s; *s && *s != '.'; ++s);
 159         if (*s) {
 160                 *s = '\0';
 161                 fac = decode(save, facilitynames);
 162                 if (fac < 0) {
 163                         (void)fprintf(stderr,
 164                             "logger: unknown facility name: %s.\n", save);
 165                         exit(1);
 166                 }
 167                 *s++ = '.';
 168         }
 169         else {
 170                 fac = 0;
 171                 s = save;
 172         }
 173         lev = decode(s, prioritynames);
 174         if (lev < 0) {
 175                 (void)fprintf(stderr,
 176                     "logger: unknown priority name: %s.\n", save);
 177                 exit(1);
 178         }
 179         return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
 180 }
 181
 182 int
 183 decode(name, codetab)
 184         char *name;
 185         CODE *codetab;
 186 {
 187         register CODE *c;
 188
 189         if (isdigit(*name))
 190                 return (atoi(name));
 191
 192         for (c = codetab; c->c_name; c++)
 193                 if (!strcasecmp(name, c->c_name))
 194                         return (c->c_val);
 195
 196         return (-1);
 197 }
 198
 199 void
 200 usage()
 201 {
 202         (void)fprintf(stderr,
 203             "logger: [-is] [-f file] [-p pri] [-t tag] [ message ... ]\n");
 204         exit(1);
 205 }