mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 19:29:02 +00:00
Vodz' last_patch57:
Ok. Patch with reduce size ready.
Notes: syslogd imposible close logsocket,
the real programm write logmessages (hmm, cycle loop?)
(Excuse me - this have small tab-formats rewroting also)
text data bss dec hex filename
2913 332 12388 15633 3d11 syslogd.o
3109 332 9252 12693 3195 syslogd_old.o
This commit is contained in:
Eric Andersen
parent
927c3bdc18
commit
871d93c462
@ -55,7 +55,7 @@
|
||||
#define __LOG_FILE "/var/log/messages"
|
||||
|
||||
/* Path to the unix socket */
|
||||
static char lfile[BUFSIZ];
|
||||
static char lfile[MAXPATHLEN];
|
||||
|
||||
static char *logFilePath = __LOG_FILE;
|
||||
|
||||
@ -63,7 +63,7 @@ static char *logFilePath = __LOG_FILE;
|
||||
static int MarkInterval = 20 * 60;
|
||||
|
||||
/* localhost's name */
|
||||
static char LocalHostName[32];
|
||||
static char LocalHostName[64];
|
||||
|
||||
#ifdef CONFIG_FEATURE_REMOTE_LOG
|
||||
#include <netinet/in.h>
|
||||
@ -78,9 +78,12 @@ static int doRemoteLog = FALSE;
|
||||
static int local_logging = FALSE;
|
||||
#endif
|
||||
|
||||
|
||||
#define MAXLINE 1024 /* maximum line length */
|
||||
|
||||
|
||||
/* circular buffer variables/structures */
|
||||
#ifdef CONFIG_FEATURE_IPC_SYSLOG
|
||||
|
||||
#if __GNU_LIBRARY__ < 5
|
||||
#error Sorry. Looks like you are using libc5.
|
||||
#error libc5 shm support isnt good enough.
|
||||
@ -96,19 +99,19 @@ static const long KEY_ID = 0x414e4547; /*"GENA"*/
|
||||
|
||||
// Semaphore operation structures
|
||||
static struct shbuf_ds {
|
||||
int size; // size of data written
|
||||
int head; // start of message list
|
||||
int tail; // end of message list
|
||||
char data[1]; // data/messages
|
||||
} *buf = NULL; // shared memory pointer
|
||||
int size; // size of data written
|
||||
int head; // start of message list
|
||||
int tail; // end of message list
|
||||
char data[1]; // data/messages
|
||||
} *buf = NULL; // shared memory pointer
|
||||
|
||||
static struct sembuf SMwup[1] = {{1, -1, IPC_NOWAIT}}; // set SMwup
|
||||
static struct sembuf SMwdn[3] = {{0, 0}, {1, 0}, {1, +1}}; // set SMwdn
|
||||
|
||||
static int shmid = -1; // ipc shared memory id
|
||||
static int s_semid = -1; // ipc semaphore id
|
||||
int data_size = 16000; // data size
|
||||
int shm_size = 16000 + sizeof(*buf); // our buffer size
|
||||
static int shmid = -1; // ipc shared memory id
|
||||
static int s_semid = -1; // ipc semaphore id
|
||||
int data_size = 16000; // data size
|
||||
int shm_size = 16000 + sizeof(*buf); // our buffer size
|
||||
static int circular_logging = FALSE;
|
||||
|
||||
/*
|
||||
@ -129,6 +132,7 @@ static inline void sem_down(int semid)
|
||||
perror_msg_and_die("semop[SMwdn]");
|
||||
}
|
||||
|
||||
|
||||
void ipcsyslog_cleanup(void){
|
||||
printf("Exiting Syslogd!\n");
|
||||
if (shmid != -1)
|
||||
@ -143,11 +147,11 @@ void ipcsyslog_cleanup(void){
|
||||
void ipcsyslog_init(void){
|
||||
if (buf == NULL){
|
||||
if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1)
|
||||
perror_msg_and_die("shmget");
|
||||
perror_msg_and_die("shmget");
|
||||
|
||||
|
||||
if ((buf = shmat(shmid, NULL, 0)) == NULL)
|
||||
perror_msg_and_die("shmat");
|
||||
perror_msg_and_die("shmat");
|
||||
|
||||
|
||||
buf->size=data_size;
|
||||
@ -155,11 +159,11 @@ void ipcsyslog_init(void){
|
||||
|
||||
// we'll trust the OS to set initial semval to 0 (let's hope)
|
||||
if ((s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023)) == -1){
|
||||
if (errno == EEXIST){
|
||||
if (errno == EEXIST){
|
||||
if ((s_semid = semget(KEY_ID, 2, 0)) == -1)
|
||||
perror_msg_and_die("semget");
|
||||
}else
|
||||
perror_msg_and_die("semget");
|
||||
perror_msg_and_die("semget");
|
||||
}
|
||||
}else{
|
||||
printf("Buffer already allocated just grab the semaphore?");
|
||||
@ -184,16 +188,16 @@ void circ_message(const char *msg){
|
||||
* insert the new message. (Note: if the message being added is >1 message then
|
||||
* we will need to "remove" >1 old message from the buffer). The way this is done
|
||||
* is the following:
|
||||
* When we reach the end of the buffer we set a mark and start from the beginning.
|
||||
* Now what about the beginning and end of the buffer? Well we have the "head"
|
||||
* index/pointer which is the starting point for the messages and we have "tail"
|
||||
* index/pointer which is the ending point for the messages. When we "display" the
|
||||
* messages we start from the beginning and continue until we reach "tail". If we
|
||||
* reach end of buffer, then we just start from the beginning (offset 0). "head" and
|
||||
* "tail" are actually offsets from the beginning of the buffer.
|
||||
* When we reach the end of the buffer we set a mark and start from the beginning.
|
||||
* Now what about the beginning and end of the buffer? Well we have the "head"
|
||||
* index/pointer which is the starting point for the messages and we have "tail"
|
||||
* index/pointer which is the ending point for the messages. When we "display" the
|
||||
* messages we start from the beginning and continue until we reach "tail". If we
|
||||
* reach end of buffer, then we just start from the beginning (offset 0). "head" and
|
||||
* "tail" are actually offsets from the beginning of the buffer.
|
||||
*
|
||||
* Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
|
||||
* a threasafe way of handling shared memory operations.
|
||||
* a threasafe way of handling shared memory operations.
|
||||
*/
|
||||
if ( (buf->tail + l) < buf->size ){
|
||||
/* before we append the message we need to check the HEAD so that we won't
|
||||
@ -207,19 +211,19 @@ void circ_message(const char *msg){
|
||||
* to worry about overflows here!
|
||||
*/
|
||||
int k= buf->tail + l - buf->head; /* we need to know how many bytes
|
||||
we are overwriting to make
|
||||
we are overwriting to make
|
||||
enough room */
|
||||
char *c=memchr(buf->data+buf->head + k,'\0',buf->size - (buf->head + k));
|
||||
if (c != NULL) {/* do a sanity check just in case! */
|
||||
buf->head = c - buf->data + 1; /* we need to convert pointer to
|
||||
buf->head = c - buf->data + 1; /* we need to convert pointer to
|
||||
offset + skip the '\0' since
|
||||
we need to point to the beginning
|
||||
of the next message */
|
||||
/* Note: HEAD is only used to "retrieve" messages, it's not used
|
||||
when writing messages into our buffer */
|
||||
}else{ /* show an error message to know we messed up? */
|
||||
printf("Weird! Can't find the terminator token??? \n");
|
||||
buf->head=0;
|
||||
printf("Weird! Can't find the terminator token??? \n");
|
||||
buf->head=0;
|
||||
}
|
||||
}
|
||||
} /* in other cases no overflows have been done yet, so we don't care! */
|
||||
@ -231,22 +235,22 @@ void circ_message(const char *msg){
|
||||
/* we need to break up the message and "circle" it around */
|
||||
char *c;
|
||||
int k=buf->tail + l - buf->size; /* count # of bytes we don't fit */
|
||||
|
||||
|
||||
/* We need to move HEAD! This is always the case since we are going
|
||||
* to "circle" the message.
|
||||
*/
|
||||
c=memchr(buf->data + k ,'\0', buf->size - k);
|
||||
|
||||
|
||||
if (c != NULL) /* if we don't have '\0'??? weird!!! */{
|
||||
/* move head pointer*/
|
||||
buf->head=c-buf->data+1;
|
||||
|
||||
/* now write the first part of the message */
|
||||
buf->head=c-buf->data+1;
|
||||
|
||||
/* now write the first part of the message */
|
||||
strncpy(buf->data + buf->tail, msg, l - k - 1);
|
||||
|
||||
|
||||
/* ALWAYS terminate end of buffer w/ '\0' */
|
||||
buf->data[buf->size-1]='\0';
|
||||
|
||||
buf->data[buf->size-1]='\0';
|
||||
|
||||
/* now write out the rest of the string to the beginning of the buffer */
|
||||
strcpy(buf->data, &msg[l-k-1]);
|
||||
|
||||
@ -256,11 +260,12 @@ void circ_message(const char *msg){
|
||||
printf("Weird! Can't find the terminator token from the beginning??? \n");
|
||||
buf->head = buf->tail = 0; /* reset buffer, since it's probably corrupted */
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
sem_up(s_semid);
|
||||
}
|
||||
#endif
|
||||
#endif /* CONFIG_FEATURE_IPC_SYSLOG */
|
||||
|
||||
/* Note: There is also a function called "message()" in init.c */
|
||||
/* Print a message to the log file. */
|
||||
static void message (char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
|
||||
@ -275,10 +280,10 @@ static void message (char *fmt, ...)
|
||||
fl.l_len = 1;
|
||||
|
||||
#ifdef CONFIG_FEATURE_IPC_SYSLOG
|
||||
if ((circular_logging) && (buf != NULL)){
|
||||
if ((circular_logging == TRUE) && (buf != NULL)){
|
||||
char b[1024];
|
||||
va_start (arguments, fmt);
|
||||
vsprintf (b, fmt, arguments);
|
||||
vsnprintf (b, sizeof(b)-1, fmt, arguments);
|
||||
va_end (arguments);
|
||||
circ_message(b);
|
||||
|
||||
@ -354,20 +359,19 @@ static const int IOV_COUNT = 2;
|
||||
memset(&res, 0, sizeof(res));
|
||||
snprintf(res, sizeof(res), "<%d>", pri);
|
||||
v->iov_base = res ;
|
||||
v->iov_len = strlen(res);
|
||||
v->iov_len = strlen(res);
|
||||
v++;
|
||||
|
||||
v->iov_base = msg;
|
||||
v->iov_len = strlen(msg);
|
||||
|
||||
v->iov_len = strlen(msg);
|
||||
writev_retry:
|
||||
if ( -1 == writev(remotefd,iov, IOV_COUNT)){
|
||||
if (errno == EINTR) goto writev_retry;
|
||||
error_msg_and_die("syslogd: cannot write to remote file handle on"
|
||||
error_msg_and_die("cannot write to remote file handle on"
|
||||
"%s:%d",RemoteHost,RemotePort);
|
||||
}
|
||||
}
|
||||
if (local_logging)
|
||||
if (local_logging == TRUE)
|
||||
#endif
|
||||
/* now spew out the message to wherever it is supposed to go */
|
||||
message("%s %s %s %s\n", timestamp, LocalHostName, res, msg);
|
||||
@ -396,7 +400,6 @@ static void domark(int sig)
|
||||
|
||||
/* This must be a #define, since when DODEBUG and BUFFERS_GO_IN_BSS are
|
||||
* enabled, we otherwise get a "storage size isn't constant error. */
|
||||
#define BUFSIZE 1023
|
||||
static int serveConnection (char* tmpbuf, int n_read)
|
||||
{
|
||||
char *p = tmpbuf;
|
||||
@ -404,16 +407,14 @@ static int serveConnection (char* tmpbuf, int n_read)
|
||||
while (p < tmpbuf + n_read) {
|
||||
|
||||
int pri = (LOG_USER | LOG_NOTICE);
|
||||
char line[ BUFSIZE + 1 ];
|
||||
char line[ MAXLINE + 1 ];
|
||||
unsigned char c;
|
||||
int gotpri = 0;
|
||||
|
||||
char *q = line;
|
||||
|
||||
while (p && (c = *p) && q < &line[ sizeof (line) - 1 ]) {
|
||||
if ((c == '<') && !gotpri && isdigit(p[1])) {
|
||||
while ( (c = *p) && q < &line[ sizeof (line) - 1 ]) {
|
||||
if (c == '<') {
|
||||
/* Parse the magic priority number. */
|
||||
gotpri = 1;
|
||||
pri = 0;
|
||||
while (isdigit (*(++p))) {
|
||||
pri = 10 * pri + (*p - '0');
|
||||
@ -441,7 +442,8 @@ static int serveConnection (char* tmpbuf, int n_read)
|
||||
|
||||
|
||||
#ifdef CONFIG_FEATURE_REMOTE_LOG
|
||||
static void init_RemoteLog (void){
|
||||
static void init_RemoteLog (void)
|
||||
{
|
||||
|
||||
struct sockaddr_in remoteaddr;
|
||||
struct hostent *hostinfo;
|
||||
@ -452,7 +454,7 @@ static void init_RemoteLog (void){
|
||||
remotefd = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
|
||||
if (remotefd < 0) {
|
||||
error_msg_and_die("syslogd: cannot create socket");
|
||||
error_msg_and_die("cannot create socket");
|
||||
}
|
||||
|
||||
hostinfo = xgethostbyname(RemoteHost);
|
||||
@ -461,26 +463,23 @@ static void init_RemoteLog (void){
|
||||
remoteaddr.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
|
||||
remoteaddr.sin_port = htons(RemotePort);
|
||||
|
||||
/*
|
||||
Since we are using UDP sockets, connect just sets the default host and port
|
||||
/*
|
||||
Since we are using UDP sockets, connect just sets the default host and port
|
||||
for future operations
|
||||
*/
|
||||
if ( 0 != (connect(remotefd, (struct sockaddr *) &remoteaddr, len))){
|
||||
error_msg_and_die("syslogd: cannot connect to remote host %s:%d", RemoteHost, RemotePort);
|
||||
error_msg_and_die("cannot connect to remote host %s:%d", RemoteHost, RemotePort);
|
||||
}
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
#define MAXLINE 1024 /* maximum line length */
|
||||
|
||||
static void doSyslogd (void) __attribute__ ((noreturn));
|
||||
static void doSyslogd (void)
|
||||
{
|
||||
struct sockaddr_un sunx;
|
||||
socklen_t addrLength;
|
||||
|
||||
|
||||
int sock_fd;
|
||||
fd_set fds;
|
||||
|
||||
@ -507,71 +506,61 @@ static void doSyslogd (void)
|
||||
perror_msg_and_die ("Couldn't get file descriptor for socket " _PATH_LOG);
|
||||
|
||||
addrLength = sizeof (sunx.sun_family) + strlen (sunx.sun_path);
|
||||
if (bind (sock_fd, (struct sockaddr *) &sunx, addrLength) < 0)
|
||||
if (bind(sock_fd, (struct sockaddr *) &sunx, addrLength) < 0)
|
||||
perror_msg_and_die ("Could not connect to socket " _PATH_LOG);
|
||||
|
||||
if (chmod (lfile, 0666) < 0)
|
||||
perror_msg_and_die ("Could not set permission on " _PATH_LOG);
|
||||
|
||||
FD_ZERO (&fds);
|
||||
FD_SET (sock_fd, &fds);
|
||||
|
||||
#ifdef CONFIG_FEATURE_IPC_SYSLOG
|
||||
if (circular_logging ){
|
||||
if (circular_logging == TRUE ){
|
||||
ipcsyslog_init();
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_FEATURE_REMOTE_LOG
|
||||
if (doRemoteLog){
|
||||
init_RemoteLog();
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_FEATURE_REMOTE_LOG
|
||||
if (doRemoteLog == TRUE){
|
||||
init_RemoteLog();
|
||||
}
|
||||
#endif
|
||||
|
||||
logMessage (LOG_SYSLOG | LOG_INFO, "syslogd started: " BB_BANNER);
|
||||
logMessage (LOG_SYSLOG | LOG_INFO, "syslogd started: " CONFIG_BANNER);
|
||||
|
||||
for (;;) {
|
||||
|
||||
fd_set readfds;
|
||||
int n_ready;
|
||||
int fd;
|
||||
FD_ZERO (&fds);
|
||||
FD_SET (sock_fd, &fds);
|
||||
|
||||
memcpy (&readfds, &fds, sizeof (fds));
|
||||
|
||||
if ((n_ready = select (FD_SETSIZE, &readfds, NULL, NULL, NULL)) < 0) {
|
||||
if (errno == EINTR) continue; /* alarm may have happened. */
|
||||
if (select (sock_fd+1, &fds, NULL, NULL, NULL) < 0) {
|
||||
if (errno == EINTR) {
|
||||
/* alarm may have happened. */
|
||||
continue;
|
||||
}
|
||||
perror_msg_and_die ("select error");
|
||||
}
|
||||
|
||||
for (fd = 0; (n_ready > 0) && (fd < FD_SETSIZE); fd++) {
|
||||
if (FD_ISSET (fd, &readfds)) {
|
||||
if (FD_ISSET (sock_fd, &fds)) {
|
||||
int i;
|
||||
RESERVE_CONFIG_BUFFER(tmpbuf, BUFSIZ + 1);
|
||||
|
||||
--n_ready;
|
||||
|
||||
if (fd == sock_fd) {
|
||||
int i;
|
||||
RESERVE_CONFIG_BUFFER(tmpbuf, BUFSIZE + 1);
|
||||
|
||||
memset(tmpbuf, '\0', BUFSIZE+1);
|
||||
if ( (i = recv(fd, tmpbuf, MAXLINE - 2, 0)) > 0) {
|
||||
if ( serveConnection(tmpbuf, i) <= 0 ) {
|
||||
close (fd);
|
||||
FD_CLR(fd, &fds);
|
||||
}
|
||||
} else {
|
||||
perror_msg_and_die ("UNIX socket error");
|
||||
}
|
||||
RELEASE_CONFIG_BUFFER (tmpbuf);
|
||||
} /* fd == sock_fd */
|
||||
}/* FD_ISSET() */
|
||||
}/* for */
|
||||
memset(tmpbuf, '\0', BUFSIZ+1);
|
||||
if ( (i = recv(sock_fd, tmpbuf, BUFSIZ, 0)) > 0) {
|
||||
serveConnection(tmpbuf, i);
|
||||
} else {
|
||||
perror_msg_and_die ("UNIX socket error");
|
||||
}
|
||||
RELEASE_CONFIG_BUFFER (tmpbuf);
|
||||
}/* FD_ISSET() */
|
||||
} /* for main loop */
|
||||
}
|
||||
|
||||
extern int syslogd_main(int argc, char **argv)
|
||||
{
|
||||
int opt;
|
||||
#if ! defined(__uClinux__)
|
||||
int doFork = TRUE;
|
||||
#endif
|
||||
|
||||
char *p;
|
||||
|
||||
@ -581,9 +570,11 @@ extern int syslogd_main(int argc, char **argv)
|
||||
case 'm':
|
||||
MarkInterval = atoi(optarg) * 60;
|
||||
break;
|
||||
#if ! defined(__uClinux__)
|
||||
case 'n':
|
||||
doFork = FALSE;
|
||||
break;
|
||||
#endif
|
||||
case 'O':
|
||||
logFilePath = xstrdup(optarg);
|
||||
break;
|
||||
@ -612,7 +603,7 @@ extern int syslogd_main(int argc, char **argv)
|
||||
|
||||
#ifdef CONFIG_FEATURE_REMOTE_LOG
|
||||
/* If they have not specified remote logging, then log locally */
|
||||
if (! doRemoteLog)
|
||||
if (doRemoteLog == FALSE)
|
||||
local_logging = TRUE;
|
||||
#endif
|
||||
|
||||
@ -625,14 +616,12 @@ extern int syslogd_main(int argc, char **argv)
|
||||
|
||||
umask(0);
|
||||
|
||||
if (doFork) {
|
||||
#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
|
||||
#if ! defined(__uClinux__)
|
||||
if (doFork == TRUE) {
|
||||
if (daemon(0, 1) < 0)
|
||||
perror_msg_and_die("daemon");
|
||||
#else
|
||||
error_msg_and_die("daemon not supported");
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
doSyslogd();
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user