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/*
* Mini logger implementation for busybox
*
* Copyright (C) 1999 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <netdb.h>
#if !defined BB_SYSLOGD
#define SYSLOG_NAMES
#include <sys/syslog.h>
#else
/* We have to do this since the header file defines static
* structues. Argh.... bad libc, bad, bad...
*/
#include <sys/syslog.h>
typedef struct _code {
char *c_name;
int c_val;
} CODE;
extern CODE prioritynames[];
extern CODE facilitynames[];
#endif
static const char logger_usage[] =
"logger [OPTION]... [MESSAGE]\n\n"
"Write MESSAGE to the system log. If MESSAGE is '-', log stdin.\n\n"
"Options:\n"
"\t-s\tLog to stderr as well as the system log.\n"
"\t-p\tEnter the message with the specified priority.\n"
"\t\tThis may be numerical or a ``facility.level'' pair.\n";
/* 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.
*/
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.
*/
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) {
fprintf(stderr, "unknown facility name: %s\n", save);
exit( FALSE);
}
*s++ = '.';
}
else {
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0) {
fprintf(stderr, "unknown priority name: %s\n", save);
exit( FALSE);
}
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
extern int logger_main(int argc, char **argv)
{
struct sockaddr_un sunx;
int fd, pri = LOG_USER|LOG_NOTICE;
int fromStdinFlag=FALSE;
int toStdErrFlag=FALSE;
int stopLookingAtMeLikeThat=FALSE;
char *message, buf[1024], buf1[1024];
time_t now;
size_t addrLength;
/* Parse any options */
while (--argc > 0 && **(++argv) == '-') {
if (*((*argv)+1) == '\0') {
fromStdinFlag=TRUE;
}
stopLookingAtMeLikeThat=FALSE;
while (*(++(*argv)) && stopLookingAtMeLikeThat==FALSE) {
switch (**argv) {
case 's':
toStdErrFlag = TRUE;
break;
case 'p':
if (--argc == 0) {
usage(logger_usage);
}
pri = pencode(*(++argv));
stopLookingAtMeLikeThat=TRUE;
break;
default:
usage(logger_usage);
}
}
}
if (fromStdinFlag==TRUE) {
/* read from stdin */
int c, i=0;
while ((c = getc(stdin)) != EOF && i<sizeof(buf1)) {
buf1[i++]=c;
}
message=buf1;
} else {
if (argc>=1) {
message=*argv;
} else {
fprintf(stderr, "No message\n");
exit( FALSE);
}
}
memset(&sunx, 0, sizeof(sunx));
sunx.sun_family = AF_UNIX; /* Unix domain socket */
strncpy(sunx.sun_path, _PATH_LOG, sizeof(sunx.sun_path));
if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 ) {
perror("Couldn't obtain descriptor for socket " _PATH_LOG);
exit( FALSE);
}
addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
if (connect(fd, (struct sockaddr *) &sunx, addrLength)) {
perror("Could not connect to socket " _PATH_LOG);
exit( FALSE);
}
time(&now);
snprintf (buf, sizeof(buf), "<%d>%.15s %s", pri, ctime(&now)+4, message);
if (toStdErrFlag==TRUE)
fprintf(stderr, "%s\n", buf);
write( fd, buf, strlen(buf)+1);
close(fd);
exit( TRUE);
}
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