/*
* Mini syslogd implementation for busybox
*
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- *
Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ *
Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
*
* Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
*
#define __LOG_FILE "/var/log/messages"
/* Path to the unix socket */
-static char lfile[BUFSIZ] = "";
+static char lfile[MAXPATHLEN];
static char *logFilePath = __LOG_FILE;
static int MarkInterval = 20 * 60;
/* localhost's name */
-static char LocalHostName[32];
+static char LocalHostName[64];
-#ifdef BB_FEATURE_REMOTE_LOG
+#ifdef CONFIG_FEATURE_REMOTE_LOG
#include <netinet/in.h>
/* udp socket for logging to remote host */
static int remotefd = -1;
static int local_logging = FALSE;
#endif
+
+#define MAXLINE 1024 /* maximum line length */
+
+
/* circular buffer variables/structures */
-#ifdef BB_FEATURE_IPC_SYSLOG
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+#if __GNU_LIBRARY__ < 5
+#error Sorry. Looks like you are using libc5.
+#error libc5 shm support isnt good enough.
+#error Please disable CONFIG_FEATURE_IPC_SYSLOG
+#endif
#include <sys/ipc.h>
#include <sys/sem.h>
// 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;
/*
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;
// 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?");
* 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
* 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! */
/* 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]);
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)));
fl.l_start = 0;
fl.l_len = 1;
-#ifdef BB_FEATURE_IPC_SYSLOG
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
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);
/* todo: supress duplicates */
-#ifdef BB_FEATURE_REMOTE_LOG
+#ifdef CONFIG_FEATURE_REMOTE_LOG
/* send message to remote logger */
if ( -1 != remotefd){
static const int IOV_COUNT = 2;
struct iovec iov[IOV_COUNT];
struct iovec *v = iov;
- bzero(&res, sizeof(res));
+ 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)){
- error_msg_and_die("syslogd: cannot write to remote file handle on"
+ if (errno == EINTR) goto writev_retry;
+ error_msg_and_die("cannot write to remote file handle on"
"%s:%d",RemoteHost,RemotePort);
}
}
{
logMessage(LOG_SYSLOG | LOG_INFO, "System log daemon exiting.");
unlink(lfile);
-#ifdef BB_FEATURE_IPC_SYSLOG
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
ipcsyslog_cleanup();
#endif
/* 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 (int conn)
+static int serveConnection (char* tmpbuf, int n_read)
{
- RESERVE_BB_BUFFER(tmpbuf, BUFSIZE + 1);
- int n_read;
-
- n_read = read (conn, tmpbuf, BUFSIZE );
+ char *p = tmpbuf;
- if (n_read > 0) {
+ while (p < tmpbuf + n_read) {
int pri = (LOG_USER | LOG_NOTICE);
- char line[ BUFSIZE + 1 ];
+ char line[ MAXLINE + 1 ];
unsigned char c;
- char *p = tmpbuf, *q = line;
-
- tmpbuf[ n_read - 1 ] = '\0';
+ char *q = line;
- while (p && (c = *p) && q < &line[ sizeof (line) - 1 ]) {
+ while ( (c = *p) && q < &line[ sizeof (line) - 1 ]) {
if (c == '<') {
/* Parse the magic priority number. */
pri = 0;
p++;
}
*q = '\0';
+ p++;
/* Now log it */
logMessage (pri, line);
}
}
-#ifdef BB_FEATURE_REMOTE_LOG
-static void init_RemoteLog (void){
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+static void init_RemoteLog (void)
+{
struct sockaddr_in remoteaddr;
struct hostent *hostinfo;
int len = sizeof(remoteaddr);
- bzero(&remoteaddr, len);
+ memset(&remoteaddr, 0, len);
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);
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);
}
}
struct sockaddr_un sunx;
socklen_t addrLength;
-
int sock_fd;
fd_set fds;
memset (&sunx, 0, sizeof (sunx));
sunx.sun_family = AF_UNIX;
strncpy (sunx.sun_path, lfile, sizeof (sunx.sun_path));
- if ((sock_fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
+ if ((sock_fd = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
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)) || (listen (sock_fd, 5)))
+ 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 BB_FEATURE_IPC_SYSLOG
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
if (circular_logging == TRUE ){
ipcsyslog_init();
}
#endif
- #ifdef BB_FEATURE_REMOTE_LOG
- if (doRemoteLog == TRUE){
- init_RemoteLog();
- }
- #endif
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+ if (doRemoteLog == TRUE){
+ init_RemoteLog();
+ }
+#endif
logMessage (LOG_SYSLOG | LOG_INFO, "syslogd started: " BB_BANNER);
for (;;) {
- fd_set readfds;
- int n_ready;
- int fd;
-
- memcpy (&readfds, &fds, sizeof (fds));
+ FD_ZERO (&fds);
+ FD_SET (sock_fd, &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)) {
-
- --n_ready;
-
- if (fd == sock_fd) {
- int conn;
-
- //printf("New Connection request.\n");
- if ((conn = accept (sock_fd, (struct sockaddr *) &sunx, &addrLength)) < 0) {
- perror_msg_and_die ("accept error");
- }
-
- FD_SET(conn, &fds);
- //printf("conn: %i, set_size: %i\n",conn,FD_SETSIZE);
- } else {
- //printf("Serving connection: %i\n",fd);
- if ( serveConnection(fd) <= 0 ) {
- close (fd);
- FD_CLR(fd, &fds);
- }
- } /* fd == sock_fd */
- }/* FD_ISSET() */
- }/* for */
+ if (FD_ISSET (sock_fd, &fds)) {
+ int i;
+ RESERVE_CONFIG_BUFFER(tmpbuf, BUFSIZ + 1);
+
+ 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;
case 'm':
MarkInterval = atoi(optarg) * 60;
break;
+#if ! defined(__uClinux__)
case 'n':
doFork = FALSE;
break;
+#endif
case 'O':
- logFilePath = strdup(optarg);
+ logFilePath = xstrdup(optarg);
break;
-#ifdef BB_FEATURE_REMOTE_LOG
+#ifdef CONFIG_FEATURE_REMOTE_LOG
case 'R':
- RemoteHost = strdup(optarg);
+ RemoteHost = xstrdup(optarg);
if ( (p = strchr(RemoteHost, ':'))){
RemotePort = atoi(p+1);
*p = '\0';
local_logging = TRUE;
break;
#endif
-#ifdef BB_FEATURE_IPC_SYSLOG
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
case 'C':
circular_logging = TRUE;
break;
}
}
-#ifdef BB_FEATURE_REMOTE_LOG
+#ifdef CONFIG_FEATURE_REMOTE_LOG
/* If they have not specified remote logging, then log locally */
if (doRemoteLog == FALSE)
local_logging = TRUE;
umask(0);
+#if ! defined(__uClinux__)
if (doFork == TRUE) {
if (daemon(0, 1) < 0)
perror_msg_and_die("daemon");
}
+#endif
doSyslogd();
return EXIT_SUCCESS;
projects / oweals / busybox.git / blobdiff