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