release/src/router/busybox/sysklogd/logger.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini logger implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8  */
   9
  10 /*
  11  * Done in syslogd_and_logger.c:
  12 #include "libbb.h"
  13 #define SYSLOG_NAMES
  14 #define SYSLOG_NAMES_CONST
  15 #include <syslog.h>
  16 */
  17
  18 /* Decode a symbolic name to a numeric value
  19  * this function is based on code
  20  * Copyright (c) 1983, 1993
  21  * The Regents of the University of California.  All rights reserved.
  22  *
  23  * Original copyright notice is retained at the end of this file.
  24  */
  25 static int decode(char *name, const CODE *codetab)
  26 {
  27         const CODE *c;
  28
  29         if (isdigit(*name))
  30                 return atoi(name);
  31         for (c = codetab; c->c_name; c++) {
  32                 if (!strcasecmp(name, c->c_name)) {
  33                         return c->c_val;
  34                 }
  35         }
  36
  37         return -1;
  38 }
  39
  40 /* Decode a symbolic name to a numeric value
  41  * this function is based on code
  42  * Copyright (c) 1983, 1993
  43  * The Regents of the University of California.  All rights reserved.
  44  *
  45  * Original copyright notice is retained at the end of this file.
  46  */
  47 static int pencode(char *s)
  48 {
  49         char *save;
  50         int lev, fac = LOG_USER;
  51
  52         for (save = s; *s && *s != '.'; ++s)
  53                 ;
  54         if (*s) {
  55                 *s = '\0';
  56                 fac = decode(save, facilitynames);
  57                 if (fac < 0)
  58                         bb_error_msg_and_die("unknown %s name: %s", "facility", save);
  59                 *s++ = '.';
  60         } else {
  61                 s = save;
  62         }
  63         lev = decode(s, prioritynames);
  64         if (lev < 0)
  65                 bb_error_msg_and_die("unknown %s name: %s", "priority", save);
  66         return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
  67 }
  68
  69 #define strbuf bb_common_bufsiz1
  70
  71 int logger_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  72 int logger_main(int argc, char **argv)
  73 {
  74         char *str_p, *str_t;
  75         int opt;
  76         int i = 0;
  77
  78         /* Fill out the name string early (may be overwritten later) */
  79         str_t = uid2uname_utoa(geteuid());
  80
  81         /* Parse any options */
  82         opt = getopt32(argv, "p:st:", &str_p, &str_t);
  83
  84         if (opt & 0x2) /* -s */
  85                 i |= LOG_PERROR;
  86         //if (opt & 0x4) /* -t */
  87         openlog(str_t, i, 0);
  88         i = LOG_USER | LOG_NOTICE;
  89         if (opt & 0x1) /* -p */
  90                 i = pencode(str_p);
  91
  92         argc -= optind;
  93         argv += optind;
  94         if (!argc) {
  95                 while (fgets(strbuf, COMMON_BUFSIZE, stdin)) {
  96                         if (strbuf[0]
  97                          && NOT_LONE_CHAR(strbuf, '\n')
  98                         ) {
  99                                 /* Neither "" nor "\n" */
 100                                 syslog(i, "%s", strbuf);
 101                         }
 102                 }
 103         } else {
 104                 char *message = NULL;
 105                 int len = 0;
 106                 int pos = 0;
 107                 do {
 108                         len += strlen(*argv) + 1;
 109                         message = xrealloc(message, len + 1);
 110                         sprintf(message + pos, " %s", *argv),
 111                         pos = len;
 112                 } while (*++argv);
 113                 syslog(i, "%s", message + 1); /* skip leading " " */
 114         }
 115
 116         closelog();
 117         return EXIT_SUCCESS;
 118 }
 119
 120 /* Clean up. Needed because we are included from syslogd_and_logger.c */
 121 #undef strbuf
 122
 123 /*-
 124  * Copyright (c) 1983, 1993
 125  *      The Regents of the University of California.  All rights reserved.
 126  *
 127  * This is the original license statement for the decode and pencode functions.
 128  *
 129  * Redistribution and use in source and binary forms, with or without
 130  * modification, are permitted provided that the following conditions
 131  * are met:
 132  * 1. Redistributions of source code must retain the above copyright
 133  *    notice, this list of conditions and the following disclaimer.
 134  * 2. Redistributions in binary form must reproduce the above copyright
 135  *    notice, this list of conditions and the following disclaimer in the
 136  *    documentation and/or other materials provided with the distribution.
 137  *
 138  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 139  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 140  *
 141  * 4. Neither the name of the University nor the names of its contributors
 142  *    may be used to endorse or promote products derived from this software
 143  *    without specific prior written permission.
 144  *
 145  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 146  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 147  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 148  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 149  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 150  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 151  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 152  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 153  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 154  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 155  * SUCH DAMAGE.
 156  */