hush/sysklogd/logger.c
Denis Vlasenko a0e2a0a192 syslogd: start using bb_common_bufsiz1 instead of stack/malloc
logger: optimize, also use bb_common_bufsiz1 (~40 bytes)
tested to eat arbitrarily-sized input at high speed - ok
2007-01-04 21:22:11 +00:00

164 lines
4.6 KiB
C

/* 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 tarball for details.
*/
#include "busybox.h"
#if !defined CONFIG_SYSLOGD
#define SYSLOG_NAMES
#include <sys/syslog.h>
#else
#include <sys/syslog.h>
# ifndef __dietlibc__
/* We have to do this since the header file defines static
* structures. Argh.... bad libc, bad, bad...
*/
typedef struct _code {
char *c_name;
int c_val;
} CODE;
extern CODE prioritynames[];
extern CODE facilitynames[];
# endif
#endif
/* 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, CODE * codetab)
{
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, facilitynames);
if (fac < 0)
bb_error_msg_and_die("unknown facility name: %s", save);
*s++ = '.';
} else {
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0)
bb_error_msg_and_die("unknown priority name: %s", save);
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
int logger_main(int argc, char **argv)
{
unsigned opt;
char *opt_p, *opt_t;
int pri = LOG_USER | LOG_NOTICE;
int option = 0;
char name[80];
/* Fill out the name string early (may be overwritten later) */
bb_getpwuid(name, geteuid(), sizeof(name));
/* Parse any options */
opt = getopt32(argc, argv, "p:st:", &opt_p, &opt_t);
argc -= optind;
argv += optind;
if (opt & 0x1) pri = pencode(opt_p); // -p
if (opt & 0x2) option |= LOG_PERROR; // -s
if (opt & 0x4) safe_strncpy(name, opt_t, sizeof(name)); // -t
openlog(name, option, 0);
if (!argc) {
while (fgets(bb_common_bufsiz1, BUFSIZ, stdin)) {
if (bb_common_bufsiz1[0]
&& NOT_LONE_CHAR(bb_common_bufsiz1, '\n')
) {
/* Neither "" nor "\n" */
syslog(pri, "%s", bb_common_bufsiz1);
}
}
} else {
char *message = NULL;
int len = 1; /* for NUL */
int pos = 0;
do {
len += strlen(*argv) + 1;
message = xrealloc(message, len);
sprintf(message + pos, " %s", *argv),
pos = len;
} while (*++argv);
syslog(pri, "%s", message + 1); /* skip leading " " */
}
closelog();
return EXIT_SUCCESS;
}
/*-
* 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.
*/