Stuf
This commit is contained in:
Eric Andersen
186
logger.c
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186
logger.c
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/*
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* Mini logger implementation for busybox
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <ctype.h>
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#include <netdb.h>
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#if !defined BB_SYSLOGD
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#define SYSLOG_NAMES
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#include <sys/syslog.h>
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#else
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/* We have to do this since the header file defines static
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* structues. Argh.... bad libc, bad, bad...
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*/
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#include <sys/syslog.h>
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typedef struct _code {
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char *c_name;
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int c_val;
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} CODE;
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extern CODE prioritynames[];
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extern CODE facilitynames[];
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#endif
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static const char logger_usage[] =
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"logger [OPTION]... [MESSAGE]\n\n"
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"Write MESSAGE to the system log. If MESSAGE is '-', log stdin.\n\n"
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"Options:\n"
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"\t-s\tLog to stderr as well as the system log.\n"
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"\t-p\tEnter the message with the specified priority.\n"
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"\t\tThis may be numerical or a ``facility.level'' pair.\n";
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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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static int
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decode(char* name, CODE* codetab)
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{
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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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static int
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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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if (*s) {
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*s = '\0';
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fac = decode(save, facilitynames);
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if (fac < 0) {
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fprintf(stderr, "unknown facility name: %s\n", save);
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exit( FALSE);
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}
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*s++ = '.';
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}
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else {
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s = save;
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}
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lev = decode(s, prioritynames);
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if (lev < 0) {
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fprintf(stderr, "unknown priority name: %s\n", save);
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exit( FALSE);
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}
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return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
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}
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extern int logger_main(int argc, char **argv)
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{
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struct sockaddr_un sunx;
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int fd, pri = LOG_USER|LOG_NOTICE;
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int toStdErrFlag=FALSE;
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char *message, buf[1024];
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time_t now;
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size_t addrLength;
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/* Parse any options */
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while (--argc > 0 && **(++argv) == '-') {
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while (*(++(*argv))) {
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switch (**argv) {
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case 's':
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toStdErrFlag = TRUE;
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break;
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case 'p':
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if (--argc == 0) {
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usage(logger_usage);
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}
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pri = pencode(*(++argv));
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if (--argc == 0) {
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usage(logger_usage);
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}
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++argv;
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break;
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default:
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usage(logger_usage);
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}
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}
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}
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if (argc>=1)
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if (**argv=='-') {
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/* read from stdin */
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} else {
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message=*argv;
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}
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else {
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fprintf(stderr, "No message\n");
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exit( FALSE);
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}
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memset(&sunx, 0, sizeof(sunx));
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sunx.sun_family = AF_UNIX; /* Unix domain socket */
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strncpy(sunx.sun_path, _PATH_LOG, sizeof(sunx.sun_path));
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if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 ) {
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perror("Couldn't obtain descriptor for socket " _PATH_LOG);
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exit( FALSE);
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}
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addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
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if (connect(fd, (struct sockaddr *) &sunx, addrLength)) {
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perror("Could not connect to socket " _PATH_LOG);
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exit( FALSE);
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}
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time(&now);
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snprintf (buf, sizeof(buf), "<%d>%.15s %s", pri, ctime(&now)+4, message);
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if (toStdErrFlag==TRUE)
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fprintf(stderr, "%s\n", buf);
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write( fd, buf, sizeof(buf));
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close(fd);
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exit( TRUE);
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}
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