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This commit is contained in:
Eric Andersen 1999-11-25 07:30:46 +00:00
parent b99df0fd65
commit 3843e96252
10 changed files with 932 additions and 119 deletions
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5
Changelog
View File

@ -10,6 +10,11 @@
from createPath into mkdir where it belonged, thereby making tar work properly.
* Fixed an off-by-one bug in cat. Given a list of file it wouldn't cat out the
last file in the list.
* Fixed 'ls -ln' so numeric group/uid are presented properly, and fixed 'ls -l'
so when uid/gid is not in /etc/{passwd,group} the numeric group/uid are
presented properly.
* Also added a TODO.
-Erik Andrsen

2
Makefile
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@ -22,7 +22,7 @@ BUILDTIME=$(shell date "+%Y%m%d-%H%M")
# Comment out the following to make a debuggable build
# Leave this off for production use.
DODEBUG=false
DODEBUG=true
# If you want a static binary, turn this on. I can't think
# of many situations where anybody would ever want it static,
# but...

14
applets/busybox.c
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@ -151,15 +151,21 @@ static const struct Applet applets[] = {
#ifdef BB_SLEEP //bin
{"sleep", sleep_main},
#endif
#ifdef BB_TAR //bin
{"tar", tar_main},
#ifdef BB_SYNC //bin
{"sync", sync_main},
#endif
#ifdef BB_SYSLOGD //sbin
{"syslogd", syslogd_main},
#endif
#ifdef BB_LOGGER //usr/bin
{"logger", logger_main},
#endif
#ifdef BB_SWAPONOFF //sbin
{"swapon", swap_on_off_main},
{"swapoff", swap_on_off_main},
#endif
#ifdef BB_SYNC //bin
{"sync", sync_main},
#ifdef BB_TAR //bin
{"tar", tar_main},
#endif
#ifdef BB_TOUCH //usr/bin
{"touch", touch_main},

14
busybox.c
View File

@ -151,15 +151,21 @@ static const struct Applet applets[] = {
#ifdef BB_SLEEP //bin
{"sleep", sleep_main},
#endif
#ifdef BB_TAR //bin
{"tar", tar_main},
#ifdef BB_SYNC //bin
{"sync", sync_main},
#endif
#ifdef BB_SYSLOGD //sbin
{"syslogd", syslogd_main},
#endif
#ifdef BB_LOGGER //usr/bin
{"logger", logger_main},
#endif
#ifdef BB_SWAPONOFF //sbin
{"swapon", swap_on_off_main},
{"swapoff", swap_on_off_main},
#endif
#ifdef BB_SYNC //bin
{"sync", sync_main},
#ifdef BB_TAR //bin
{"tar", tar_main},
#endif
#ifdef BB_TOUCH //usr/bin
{"touch", touch_main},

2
busybox.def.h
View File

@ -28,6 +28,7 @@
#define BB_LN
#define BB_LOADFONT
#define BB_LOADKMAP
#define BB_LOGGER
#define BB_LS
//#define BB_MAKEDEVS
//#define BB_MATH
@ -53,6 +54,7 @@
#define BB_SLEEP
#define BB_SWAPONOFF
#define BB_SYNC
#define BB_SYSLOGD
#define BB_TAR
#define BB_TOUCH
#define BB_TRUE_FALSE

2
internal.h
View File

@ -104,6 +104,8 @@ extern int sed_main(int argc, char** argv);
extern int sleep_main(int argc, char** argv);
extern int swap_on_off_main(int argc, char** argv);
extern int sync_main(int argc, char** argv);
extern int syslogd_main(int argc, char **argv);
extern int logger_main(int argc, char **argv);
extern int tar_main(int argc, char** argv);
extern int touch_main(int argc, char** argv);
extern int tput_main(int argc, char** argv);

186
logger.c Normal file
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@ -0,0 +1,186 @@
/*
* 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 toStdErrFlag=FALSE;
char *message, buf[1024];
time_t now;
size_t addrLength;
/* Parse any options */
while (--argc > 0 && **(++argv) == '-') {
while (*(++(*argv))) {
switch (**argv) {
case 's':
toStdErrFlag = TRUE;
break;
case 'p':
if (--argc == 0) {
usage(logger_usage);
}
pri = pencode(*(++argv));
if (--argc == 0) {
usage(logger_usage);
}
++argv;
break;
default:
usage(logger_usage);
}
}
}
if (argc>=1)
if (**argv=='-') {
/* read from stdin */
} else {
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, sizeof(buf));
close(fd);
exit( TRUE);
}

186
sysklogd/logger.c Normal file
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@ -0,0 +1,186 @@
/*
* 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 toStdErrFlag=FALSE;
char *message, buf[1024];
time_t now;
size_t addrLength;
/* Parse any options */
while (--argc > 0 && **(++argv) == '-') {
while (*(++(*argv))) {
switch (**argv) {
case 's':
toStdErrFlag = TRUE;
break;
case 'p':
if (--argc == 0) {
usage(logger_usage);
}
pri = pencode(*(++argv));
if (--argc == 0) {
usage(logger_usage);
}
++argv;
break;
default:
usage(logger_usage);
}
}
}
if (argc>=1)
if (**argv=='-') {
/* read from stdin */
} else {
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, sizeof(buf));
close(fd);
exit( TRUE);
}

320
sysklogd/syslogd.c
View File

@ -1,86 +1,296 @@
/* userver.c - simple server for Unix domain sockets */
/* Waits for a connection on the ./sample-socket Unix domain
socket. Once a connection has been established, copy data
from the socket to stdout until the other end closes the
connection, and then wait for another connection to the socket. */
/*
* Mini syslogd 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>
#define _PATH_LOG "/dev/log"
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <netdb.h>
/* issue an error message via perror() and terminate the program */
void die(char * message) {
perror(message);
exit(1);
/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
#define SYSLOG_NAMES
#include <sys/syslog.h>
/* Path for the file where all log messages are written */
#define __LOG_FILE "/var/log/messages"
/* Path to the current console device */
#define __DEV_CONSOLE "/dev/console"
static char* logFilePath = __LOG_FILE;
/* interval between marks in seconds */
static int MarkInterval = 20*60;
/* localhost's name */
static char LocalHostName[32];
static const char syslogd_usage[] =
"syslogd [OPTION]...\n\n"
"Linux system logging utility.\n\n"
"Options:\n"
"\t-m\tChange the mark timestamp interval. default=20min. 0=off\n"
"\t-n\tDo not fork into the background (for when run by init)\n"
"\t-O\tSpecify an alternate log file. default=/var/log/messages\n";
/* try to open up the specified device */
static int device_open(char *device, int mode)
{
int m, f, fd = -1;
m = mode | O_NONBLOCK;
/* Retry up to 5 times */
for (f = 0; f < 5; f++)
if ((fd = open(device, m)) >= 0)
break;
if (fd < 0)
return fd;
/* Reset original flags. */
if (m != mode)
fcntl(fd, F_SETFL, mode);
return fd;
}
/* Copies data from file descriptor 'from' to file descriptor 'to'
until nothing is left to be copied. Exits if an error occurs. */
void copyData(int from, int to) {
char buf[1024];
int amount;
while ((amount = read(from, buf, sizeof(buf))) > 0) {
if (write(to, buf, amount) != amount) {
die("write");
return;
}
/* print a message to the log file */
static void message(char *fmt, ...)
{
int fd;
va_list arguments;
if ((fd = device_open(logFilePath, O_WRONLY|O_CREAT|O_NOCTTY|O_APPEND|O_NONBLOCK)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
close(fd);
} else {
/* Always send console messages to /dev/console so people will see them. */
if ((fd = device_open(__DEV_CONSOLE, O_WRONLY|O_NOCTTY|O_NONBLOCK)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
close(fd);
} else {
fprintf(stderr, "Bummer, can't print: ");
va_start(arguments, fmt);
vfprintf(stderr, fmt, arguments);
fflush(stderr);
va_end(arguments);
}
}
if (amount < 0)
die("read");
}
static void logMessage( int pri, char* msg)
{
time_t now;
char *timestamp;
static char res[20];
CODE *c_pri, *c_fac;
int main(void) {
struct sockaddr_un address;
for (c_fac=facilitynames; c_fac->c_name && !(c_fac->c_val==LOG_FAC(pri)<<3); c_fac++);
for (c_pri=prioritynames; c_pri->c_name && !(c_pri->c_val==LOG_PRI(pri)); c_pri++);
if (*c_fac->c_name=='\0' || *c_pri->c_name=='\0')
snprintf (res, sizeof(res), "<%d>", pri);
else
snprintf (res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
{
time(&now);
timestamp = ctime(&now) + 4;
timestamp[15] = '\0';
} else {
timestamp = msg;
timestamp[15] = '\0';
msg += 16;
}
/* todo: supress duplicates */
/* now spew out the message to wherever it is supposed to go */
message( "%s %s %s %s\n", timestamp, LocalHostName, res, msg);
}
static void quit_signal(int sig)
{
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd exiting");
exit( TRUE);
}
static void restart_signal(int sig)
{
/* pretend to restart */
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd restarting");
}
static void domark(int sig)
{
if (MarkInterval > 0) {
logMessage(LOG_SYSLOG|LOG_INFO, "-- MARK --");
signal(SIGALRM, domark);
alarm(MarkInterval);
}
}
static void doSyslogd(void)
{
struct sockaddr_un sunx;
int fd, conn;
size_t addrLength;
char buf[1024];
char *q, *p = buf;
int readSize;
/* Remove any preexisting socket (or other file) */
/* Remove any preexisting socket/file */
unlink(_PATH_LOG);
memset(&address, 0, sizeof(address));
address.sun_family = AF_UNIX; /* Unix domain socket */
strncpy(address.sun_path, _PATH_LOG, sizeof(address.sun_path));
/* Set up sig handlers */
signal(SIGINT, quit_signal);
signal(SIGTERM, quit_signal);
signal(SIGQUIT, quit_signal);
signal(SIGHUP, restart_signal);
signal(SIGALRM, domark);
alarm(MarkInterval);
if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
die("socket");
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 ( (bind(fd, (struct sockaddr *) &sunx, addrLength)) ||
(chmod(_PATH_LOG, 0666) < 0) ||
(listen(fd, 5)) )
{
perror("Could not connect to socket " _PATH_LOG);
exit( FALSE);
}
/* Get localhost's name */
gethostname(LocalHostName, sizeof(LocalHostName));
if ( (p = strchr(LocalHostName, '.')) ) {
*p++ = '\0';
}
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd started: "
"BusyBox v" BB_VER " (" BB_BT ") multi-call binary");
/* The total length of the address includes the sun_family
element */
addrLength = sizeof(address.sun_family) +
strlen(address.sun_path);
while ((conn = accept(fd, (struct sockaddr *) &sunx,
&addrLength)) >= 0)
{
while ((readSize=read(conn, buf, sizeof(buf))) > 0)
{
char line[1025];
unsigned char c;
int pri = (LOG_USER|LOG_NOTICE);
if (bind(fd, (struct sockaddr *) &address, addrLength))
die("bind");
memset (line, 0, sizeof(line));
p = buf;
q = line;
while ( p && (c = *p) && q < &line[sizeof(line) - 1]) {
if (c == '<') {
/* Parse the magic priority number */
pri = 0;
while (isdigit(*(++p))) {
pri = 10 * pri + (*p - '0');
}
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
pri = (LOG_USER|LOG_NOTICE);
} else if (c == '\n') {
*q++ = ' ';
} else if (iscntrl(c)&&(c<0177)) {
*q++ = '^';
*q++ = c ^ 0100;
} else {
*q++ = c;
}
p++;
}
*q = '\0';
if (chmod(_PATH_LOG, 0666) < 0)
die("chmod");
if (listen(fd, 5))
die("listen");
while ((conn = accept(fd, (struct sockaddr *) &address,
&addrLength)) >= 0) {
printf("---- getting data\n");
copyData(conn, fileno(stdout));
printf("---- done\n");
/* Now log it */
logMessage( pri, line);
}
close(conn);
}
if (conn < 0)
die("accept");
close(fd);
return 0;
}
extern int syslogd_main(int argc, char **argv)
{
int pid;
int doFork = TRUE;
while (--argc > 0 && **(++argv) == '-') {
while (*(++(*argv))) {
switch (**argv) {
case 'm':
if (--argc == 0) {
usage(syslogd_usage);
}
MarkInterval = atoi(*(++argv))*60;
break;
case 'n':
doFork = FALSE;
break;
case 'O':
if (--argc == 0) {
usage(syslogd_usage);
}
logFilePath = *(++argv);
break;
default:
usage(syslogd_usage);
}
}
}
if (doFork == TRUE) {
pid = fork();
if ( pid < 0 )
exit( pid);
else if ( pid == 0 ) {
doSyslogd();
}
} else {
doSyslogd();
}
exit( TRUE);
}

320
syslogd.c
View File

@ -1,86 +1,296 @@
/* userver.c - simple server for Unix domain sockets */
/* Waits for a connection on the ./sample-socket Unix domain
socket. Once a connection has been established, copy data
from the socket to stdout until the other end closes the
connection, and then wait for another connection to the socket. */
/*
* Mini syslogd 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>
#define _PATH_LOG "/dev/log"
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <netdb.h>
/* issue an error message via perror() and terminate the program */
void die(char * message) {
perror(message);
exit(1);
/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
#define SYSLOG_NAMES
#include <sys/syslog.h>
/* Path for the file where all log messages are written */
#define __LOG_FILE "/var/log/messages"
/* Path to the current console device */
#define __DEV_CONSOLE "/dev/console"
static char* logFilePath = __LOG_FILE;
/* interval between marks in seconds */
static int MarkInterval = 20*60;
/* localhost's name */
static char LocalHostName[32];
static const char syslogd_usage[] =
"syslogd [OPTION]...\n\n"
"Linux system logging utility.\n\n"
"Options:\n"
"\t-m\tChange the mark timestamp interval. default=20min. 0=off\n"
"\t-n\tDo not fork into the background (for when run by init)\n"
"\t-O\tSpecify an alternate log file. default=/var/log/messages\n";
/* try to open up the specified device */
static int device_open(char *device, int mode)
{
int m, f, fd = -1;
m = mode | O_NONBLOCK;
/* Retry up to 5 times */
for (f = 0; f < 5; f++)
if ((fd = open(device, m)) >= 0)
break;
if (fd < 0)
return fd;
/* Reset original flags. */
if (m != mode)
fcntl(fd, F_SETFL, mode);
return fd;
}
/* Copies data from file descriptor 'from' to file descriptor 'to'
until nothing is left to be copied. Exits if an error occurs. */
void copyData(int from, int to) {
char buf[1024];
int amount;
while ((amount = read(from, buf, sizeof(buf))) > 0) {
if (write(to, buf, amount) != amount) {
die("write");
return;
}
/* print a message to the log file */
static void message(char *fmt, ...)
{
int fd;
va_list arguments;
if ((fd = device_open(logFilePath, O_WRONLY|O_CREAT|O_NOCTTY|O_APPEND|O_NONBLOCK)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
close(fd);
} else {
/* Always send console messages to /dev/console so people will see them. */
if ((fd = device_open(__DEV_CONSOLE, O_WRONLY|O_NOCTTY|O_NONBLOCK)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
close(fd);
} else {
fprintf(stderr, "Bummer, can't print: ");
va_start(arguments, fmt);
vfprintf(stderr, fmt, arguments);
fflush(stderr);
va_end(arguments);
}
}
if (amount < 0)
die("read");
}
static void logMessage( int pri, char* msg)
{
time_t now;
char *timestamp;
static char res[20];
CODE *c_pri, *c_fac;
int main(void) {
struct sockaddr_un address;
for (c_fac=facilitynames; c_fac->c_name && !(c_fac->c_val==LOG_FAC(pri)<<3); c_fac++);
for (c_pri=prioritynames; c_pri->c_name && !(c_pri->c_val==LOG_PRI(pri)); c_pri++);
if (*c_fac->c_name=='\0' || *c_pri->c_name=='\0')
snprintf (res, sizeof(res), "<%d>", pri);
else
snprintf (res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
{
time(&now);
timestamp = ctime(&now) + 4;
timestamp[15] = '\0';
} else {
timestamp = msg;
timestamp[15] = '\0';
msg += 16;
}
/* todo: supress duplicates */
/* now spew out the message to wherever it is supposed to go */
message( "%s %s %s %s\n", timestamp, LocalHostName, res, msg);
}
static void quit_signal(int sig)
{
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd exiting");
exit( TRUE);
}
static void restart_signal(int sig)
{
/* pretend to restart */
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd restarting");
}
static void domark(int sig)
{
if (MarkInterval > 0) {
logMessage(LOG_SYSLOG|LOG_INFO, "-- MARK --");
signal(SIGALRM, domark);
alarm(MarkInterval);
}
}
static void doSyslogd(void)
{
struct sockaddr_un sunx;
int fd, conn;
size_t addrLength;
char buf[1024];
char *q, *p = buf;
int readSize;
/* Remove any preexisting socket (or other file) */
/* Remove any preexisting socket/file */
unlink(_PATH_LOG);
memset(&address, 0, sizeof(address));
address.sun_family = AF_UNIX; /* Unix domain socket */
strncpy(address.sun_path, _PATH_LOG, sizeof(address.sun_path));
/* Set up sig handlers */
signal(SIGINT, quit_signal);
signal(SIGTERM, quit_signal);
signal(SIGQUIT, quit_signal);
signal(SIGHUP, restart_signal);
signal(SIGALRM, domark);
alarm(MarkInterval);
if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
die("socket");
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 ( (bind(fd, (struct sockaddr *) &sunx, addrLength)) ||
(chmod(_PATH_LOG, 0666) < 0) ||
(listen(fd, 5)) )
{
perror("Could not connect to socket " _PATH_LOG);
exit( FALSE);
}
/* Get localhost's name */
gethostname(LocalHostName, sizeof(LocalHostName));
if ( (p = strchr(LocalHostName, '.')) ) {
*p++ = '\0';
}
logMessage(LOG_SYSLOG|LOG_INFO, "syslogd started: "
"BusyBox v" BB_VER " (" BB_BT ") multi-call binary");
/* The total length of the address includes the sun_family
element */
addrLength = sizeof(address.sun_family) +
strlen(address.sun_path);
while ((conn = accept(fd, (struct sockaddr *) &sunx,
&addrLength)) >= 0)
{
while ((readSize=read(conn, buf, sizeof(buf))) > 0)
{
char line[1025];
unsigned char c;
int pri = (LOG_USER|LOG_NOTICE);
if (bind(fd, (struct sockaddr *) &address, addrLength))
die("bind");
memset (line, 0, sizeof(line));
p = buf;
q = line;
while ( p && (c = *p) && q < &line[sizeof(line) - 1]) {
if (c == '<') {
/* Parse the magic priority number */
pri = 0;
while (isdigit(*(++p))) {
pri = 10 * pri + (*p - '0');
}
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
pri = (LOG_USER|LOG_NOTICE);
} else if (c == '\n') {
*q++ = ' ';
} else if (iscntrl(c)&&(c<0177)) {
*q++ = '^';
*q++ = c ^ 0100;
} else {
*q++ = c;
}
p++;
}
*q = '\0';
if (chmod(_PATH_LOG, 0666) < 0)
die("chmod");
if (listen(fd, 5))
die("listen");
while ((conn = accept(fd, (struct sockaddr *) &address,
&addrLength)) >= 0) {
printf("---- getting data\n");
copyData(conn, fileno(stdout));
printf("---- done\n");
/* Now log it */
logMessage( pri, line);
}
close(conn);
}
if (conn < 0)
die("accept");
close(fd);
return 0;
}
extern int syslogd_main(int argc, char **argv)
{
int pid;
int doFork = TRUE;
while (--argc > 0 && **(++argv) == '-') {
while (*(++(*argv))) {
switch (**argv) {
case 'm':
if (--argc == 0) {
usage(syslogd_usage);
}
MarkInterval = atoi(*(++argv))*60;
break;
case 'n':
doFork = FALSE;
break;
case 'O':
if (--argc == 0) {
usage(syslogd_usage);
}
logFilePath = *(++argv);
break;
default:
usage(syslogd_usage);
}
}
}
if (doFork == TRUE) {
pid = fork();
if ( pid < 0 )
exit( pid);
else if ( pid == 0 ) {
doSyslogd();
}
} else {
doSyslogd();
}
exit( TRUE);
}