182 lines
5.4 KiB
C
182 lines
5.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini logger implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config LOGGER
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//config: bool "logger (6.3 kb)"
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//config: default y
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//config: select FEATURE_SYSLOG
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//config: help
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//config: The logger utility allows you to send arbitrary text
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//config: messages to the system log (i.e. the 'syslogd' utility) so
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//config: they can be logged. This is generally used to help locate
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//config: problems that occur within programs and scripts.
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//applet:IF_LOGGER(APPLET(logger, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_LOGGER) += syslogd_and_logger.o
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//usage:#define logger_trivial_usage
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//usage: "[OPTIONS] [MESSAGE]"
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//usage:#define logger_full_usage "\n\n"
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//usage: "Write MESSAGE (or stdin) to syslog\n"
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//usage: "\n -s Log to stderr as well as the system log"
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//usage: "\n -t TAG Log using the specified tag (defaults to user name)"
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//usage: "\n -p PRIO Priority (numeric or facility.level pair)"
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//usage:
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//usage:#define logger_example_usage
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//usage: "$ logger \"hello\"\n"
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/*
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* Done in syslogd_and_logger.c:
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#include "libbb.h"
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#define SYSLOG_NAMES
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#define SYSLOG_NAMES_CONST
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#include <syslog.h>
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*/
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/* Decode a symbolic name to a numeric value
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* this function is based on code
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Original copyright notice is retained at the end of this file.
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*/
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static int decode(char *name, const CODE *codetab)
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{
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const CODE *c;
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if (isdigit(*name))
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return atoi(name);
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for (c = codetab; c->c_name; c++) {
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if (!strcasecmp(name, c->c_name)) {
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return c->c_val;
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}
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}
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return -1;
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}
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/* Decode a symbolic name to a numeric value
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* this function is based on code
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Original copyright notice is retained at the end of this file.
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*/
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static int pencode(char *s)
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{
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char *save;
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int lev, fac = LOG_USER;
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for (save = s; *s && *s != '.'; ++s)
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;
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if (*s) {
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*s = '\0';
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fac = decode(save, bb_facilitynames);
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if (fac < 0)
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bb_error_msg_and_die("unknown %s name: %s", "facility", save);
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*s++ = '.';
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} else {
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s = save;
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}
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lev = decode(s, bb_prioritynames);
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if (lev < 0)
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bb_error_msg_and_die("unknown %s name: %s", "priority", save);
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return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
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}
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#define strbuf bb_common_bufsiz1
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int logger_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int logger_main(int argc UNUSED_PARAM, char **argv)
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{
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char *str_p, *str_t;
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int opt;
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int i = 0;
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setup_common_bufsiz();
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/* Fill out the name string early (may be overwritten later) */
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str_t = uid2uname_utoa(geteuid());
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/* Parse any options */
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opt = getopt32(argv, "p:st:", &str_p, &str_t);
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if (opt & 0x2) /* -s */
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i |= LOG_PERROR;
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//if (opt & 0x4) /* -t */
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openlog(str_t, i, 0);
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i = LOG_USER | LOG_NOTICE;
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if (opt & 0x1) /* -p */
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i = pencode(str_p);
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argv += optind;
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if (!argv[0]) {
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while (fgets(strbuf, COMMON_BUFSIZE, stdin)) {
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if (strbuf[0]
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&& NOT_LONE_CHAR(strbuf, '\n')
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) {
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/* Neither "" nor "\n" */
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syslog(i, "%s", strbuf);
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}
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}
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} else {
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char *message = NULL;
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int len = 0;
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int pos = 0;
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do {
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len += strlen(*argv) + 1;
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message = xrealloc(message, len + 1);
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sprintf(message + pos, " %s", *argv),
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pos = len;
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} while (*++argv);
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syslog(i, "%s", message + 1); /* skip leading " " */
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}
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closelog();
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return EXIT_SUCCESS;
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}
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/* Clean up. Needed because we are included from syslogd_and_logger.c */
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#undef strbuf
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/*-
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This is the original license statement for the decode and pencode functions.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change
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* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
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*
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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