logger.tproj/logger.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1983, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #include <errno.h>
  59 #include <unistd.h>
  60 #include <stdlib.h>
  61 #include <stdio.h>
  62 #include <ctype.h>
  63 #include <string.h>
  64
  65 #define SYSLOG_NAMES
  66 #include <syslog.h>
  67
  68 int     decode __P((char *, CODE *));
  69 int     pencode __P((char *));
  70 void    usage __P((void));
  71
  72 /*
  73  * logger -- read and log utility
  74  *
  75  *      Reads from an input and arranges to write the result on the system
  76  *      log.
  77  */
  78 int
  79 main(argc, argv)
  80         int argc;
  81         char *argv[];
  82 {
  83         int ch, logflags, pri;
  84         char *tag, buf[1024];
  85
  86         tag = NULL;
  87         pri = LOG_NOTICE;
  88         logflags = 0;
  89         while ((ch = getopt(argc, argv, "f:ip:st:")) != -1)
  90                 switch((char)ch) {
  91                 case 'f':               /* file to log */
  92                         if (freopen(optarg, "r", stdin) == NULL) {
  93                                 (void)fprintf(stderr, "logger: %s: %s.\n",
  94                                     optarg, strerror(errno));
  95                                 exit(1);
  96                         }
  97                         break;
  98                 case 'i':               /* log process id also */
  99                         logflags |= LOG_PID;
 100                         break;
 101                 case 'p':               /* priority */
 102                         pri = pencode(optarg);
 103                         break;
 104                 case 's':               /* log to standard error */
 105                         logflags |= LOG_PERROR;
 106                         break;
 107                 case 't':               /* tag */
 108                         tag = optarg;
 109                         break;
 110                 case '?':
 111                 default:
 112                         usage();
 113                 }
 114         argc -= optind;
 115         argv += optind;
 116
 117         /* setup for logging */
 118         openlog(tag ? tag : getlogin(), logflags, 0);
 119         (void) fclose(stdout);
 120
 121         /* log input line if appropriate */
 122         if (argc > 0) {
 123                 register char *p, *endp;
 124                 int len;
 125
 126                 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
 127                         len = strlen(*argv);
 128                         if (p + len > endp && p > buf) {
 129                                 syslog(pri, "%s", buf);
 130                                 p = buf;
 131                         }
 132                         if (len > sizeof(buf) - 1)
 133                                 syslog(pri, "%s", *argv++);
 134                         else {
 135                                 if (p != buf)
 136                                         *p++ = ' ';
 137                                 bcopy(*argv++, p, len);
 138                                 *(p += len) = '\0';
 139                         }
 140                 }
 141                 if (p != buf)
 142                         syslog(pri, "%s", buf);
 143         } else
 144                 while (fgets(buf, sizeof(buf), stdin) != NULL)
 145                         syslog(pri, "%s", buf);
 146         exit(0);
 147 }
 148
 149 /*
 150  *  Decode a symbolic name to a numeric value
 151  */
 152 int
 153 pencode(s)
 154         register char *s;
 155 {
 156         char *save;
 157         int fac, lev;
 158
 159         for (save = s; *s && *s != '.'; ++s);
 160         if (*s) {
 161                 *s = '\0';
 162                 fac = decode(save, facilitynames);
 163                 if (fac < 0) {
 164                         (void)fprintf(stderr,
 165                             "logger: unknown facility name: %s.\n", save);
 166                         exit(1);
 167                 }
 168                 *s++ = '.';
 169         }
 170         else {
 171                 fac = 0;
 172                 s = save;
 173         }
 174         lev = decode(s, prioritynames);
 175         if (lev < 0) {
 176                 (void)fprintf(stderr,
 177                     "logger: unknown priority name: %s.\n", save);
 178                 exit(1);
 179         }
 180         return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
 181 }
 182
 183 int
 184 decode(name, codetab)
 185         char *name;
 186         CODE *codetab;
 187 {
 188         register CODE *c;
 189
 190         if (isdigit(*name))
 191                 return (atoi(name));
 192
 193         for (c = codetab; c->c_name; c++)
 194                 if (!strcasecmp(name, c->c_name))
 195                         return (c->c_val);
 196
 197         return (-1);
 198 }
 199
 200 void
 201 usage()
 202 {
 203         (void)fprintf(stderr,
 204             "logger: [-is] [-f file] [-p pri] [-t tag] [ message ... ]\n");
 205         exit(1);
 206 }