logger.tproj/logger.c

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