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run through indent and manually check result

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This commit is contained in:
Glenn L McGrath
2002-11-10 22:46:45 +00:00
parent f234e7c755
commit 912d8f4cbc
1 changed files with 249 additions and 224 deletions
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297
sysklogd/syslogd.c
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@@ -69,10 +69,13 @@ static char LocalHostName[64];
#include <netinet/in.h>
/* udp socket for logging to remote host */
static int remotefd = -1;
/* where do we log? */
static char *RemoteHost;
/* what port to log to? */
static int RemotePort = 514;
/* To remote log or not to remote log, that is the question. */
static int doRemoteLog = FALSE;
static int local_logging = FALSE;
@@ -95,7 +98,7 @@ static int local_logging = FALSE;
#include <sys/shm.h>
/* our shared key */
static const long KEY_ID = 0x414e4547; /*"GENA"*/
static const long KEY_ID = 0x414e4547; /*"GENA" */
// Semaphore operation structures
static struct shbuf_ds {
@@ -105,8 +108,8 @@ static struct shbuf_ds {
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 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
@@ -119,8 +122,9 @@ static int circular_logging = FALSE;
*/
static inline void sem_up(int semid)
{
if ( semop(semid, SMwup, 1) == -1 )
if (semop(semid, SMwup, 1) == -1) {
perror_msg_and_die("semop[SMwup]");
}
}
/*
@@ -128,51 +132,60 @@ static inline void sem_up(int semid)
*/
static inline void sem_down(int semid)
{
if ( semop(semid, SMwdn, 3) == -1 )
if (semop(semid, SMwdn, 3) == -1) {
perror_msg_and_die("semop[SMwdn]");
}
}
void ipcsyslog_cleanup(void){
void ipcsyslog_cleanup(void)
{
printf("Exiting Syslogd!\n");
if (shmid != -1)
if (shmid != -1) {
shmdt(buf);
}
if (shmid != -1)
if (shmid != -1) {
shmctl(shmid, IPC_RMID, NULL);
if (s_semid != -1)
}
if (s_semid != -1) {
semctl(s_semid, 0, IPC_RMID, 0);
}
}
void ipcsyslog_init(void){
if (buf == NULL){
if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1)
void ipcsyslog_init(void)
{
if (buf == NULL) {
if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1) {
perror_msg_and_die("shmget");
}
if ((buf = shmat(shmid, NULL, 0)) == NULL)
if ((buf = shmat(shmid, NULL, 0)) == NULL) {
perror_msg_and_die("shmat");
}
buf->size=data_size;
buf->head=buf->tail=0;
buf->size = data_size;
buf->head = buf->tail = 0;
// 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 ((s_semid = semget(KEY_ID, 2, 0)) == -1)
perror_msg_and_die("semget");
}else
if ((s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023)) == -1) {
if (errno == EEXIST) {
if ((s_semid = semget(KEY_ID, 2, 0)) == -1) {
perror_msg_and_die("semget");
}
}else{
} else {
perror_msg_and_die("semget");
}
}
} else {
printf("Buffer already allocated just grab the semaphore?");
}
}
/* write message to buffer */
void circ_message(const char *msg){
int l=strlen(msg)+1; /* count the whole message w/ '\0' included */
void circ_message(const char *msg)
{
int l = strlen(msg) + 1; /* count the whole message w/ '\0' included */
sem_down(s_semid);
@@ -199,65 +212,69 @@ void circ_message(const char *msg){
* Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
* a threasafe way of handling shared memory operations.
*/
if ( (buf->tail + l) < buf->size ){
if ((buf->tail + l) < buf->size) {
/* before we append the message we need to check the HEAD so that we won't
overwrite any of the message that we still need and adjust HEAD to point
to the next message! */
if ( buf->tail < buf->head){
if ( (buf->tail + l) >= buf->head ){
if (buf->tail < buf->head) {
if ((buf->tail + l) >= buf->head) {
/* we need to move the HEAD to point to the next message
* Theoretically we have enough room to add the whole message to the
* buffer, because of the first outer IF statement, so we don't have
* to worry about overflows here!
*/
int k= buf->tail + l - buf->head; /* we need to know how many bytes
int k = buf->tail + l - buf->head; /* we need to know how many bytes
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! */
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
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? */
} else { /* show an error message to know we messed up? */
printf("Weird! Can't find the terminator token??? \n");
buf->head=0;
buf->head = 0;
}
}
}
} /* in other cases no overflows have been done yet, so we don't care! */
/* in other cases no overflows have been done yet, so we don't care! */
/* we should be ok to append the message now */
strncpy(buf->data + buf->tail,msg,l); /* append our message */
buf->tail+=l; /* count full message w/ '\0' terminating char */
}else{
strncpy(buf->data + buf->tail, msg, l); /* append our message */
buf->tail += l; /* count full message w/ '\0' terminating char */
} else {
/* 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 */
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);
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;
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 */
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]);
strcpy(buf->data, &msg[l - k - 1]);
/* we need to place the TAIL at the end of the message */
buf->tail = k + 1;
}else{
printf("Weird! Can't find the terminator token from the beginning??? \n");
} else {
printf
("Weird! Can't find the terminator token from the beginning??? \n");
buf->head = buf->tail = 0; /* reset buffer, since it's probably corrupted */
}
@@ -268,8 +285,8 @@ void circ_message(const char *msg){
/* 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)));
static void message (char *fmt, ...)
static void message(char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
static void message(char *fmt, ...)
{
int fd;
struct flock fl;
@@ -280,45 +297,48 @@ static void message (char *fmt, ...)
fl.l_len = 1;
#ifdef CONFIG_FEATURE_IPC_SYSLOG
if ((circular_logging == TRUE) && (buf != NULL)){
if ((circular_logging == TRUE) && (buf != NULL)) {
char b[1024];
va_start (arguments, fmt);
vsnprintf (b, sizeof(b)-1, fmt, arguments);
va_end (arguments);
va_start(arguments, fmt);
vsnprintf(b, sizeof(b) - 1, fmt, arguments);
va_end(arguments);
circ_message(b);
}else
} else
#endif
if ((fd = device_open (logFilePath,
if ((fd =
device_open(logFilePath,
O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
O_NONBLOCK)) >= 0) {
fl.l_type = F_WRLCK;
fcntl (fd, F_SETLKW, &fl);
va_start (arguments, fmt);
vdprintf (fd, fmt, arguments);
va_end (arguments);
fcntl(fd, F_SETLKW, &fl);
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
fl.l_type = F_UNLCK;
fcntl (fd, F_SETLKW, &fl);
close (fd);
fcntl(fd, F_SETLKW, &fl);
close(fd);
} else {
/* Always send console messages to /dev/console so people will see them. */
if ((fd = device_open (_PATH_CONSOLE,
if ((fd =
device_open(_PATH_CONSOLE,
O_WRONLY | O_NOCTTY | O_NONBLOCK)) >= 0) {
va_start (arguments, fmt);
vdprintf (fd, fmt, arguments);
va_end (arguments);
close (fd);
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);
fprintf(stderr, "Bummer, can't print: ");
va_start(arguments, fmt);
vfprintf(stderr, fmt, arguments);
fflush(stderr);
va_end(arguments);
}
}
}
static void logMessage (int pri, char *msg)
static void logMessage(int pri, char *msg)
{
time_t now;
char *timestamp;
@@ -330,11 +350,12 @@ static void logMessage (int pri, char *msg)
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 == NULL || c_pri->c_name == NULL)
if (c_fac->c_name == NULL || c_pri->c_name == NULL) {
snprintf(res, sizeof(res), "<%d>", pri);
else
} 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] != ' ') {
@@ -351,32 +372,32 @@ static void logMessage (int pri, char *msg)
#ifdef CONFIG_FEATURE_REMOTE_LOG
/* send message to remote logger */
if ( -1 != remotefd){
static const int IOV_COUNT = 2;
if (-1 != remotefd) {
static const int IOV_COUNT = 2;
struct iovec iov[IOV_COUNT];
struct iovec *v = iov;
memset(&res, 0, sizeof(res));
snprintf(res, sizeof(res), "<%d>", pri);
v->iov_base = res ;
v->iov_base = res;
v->iov_len = strlen(res);
v++;
v->iov_base = 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("cannot write to remote file handle on"
"%s:%d",RemoteHost,RemotePort);
writev_retry:
if (-1 == writev(remotefd, iov, IOV_COUNT)) {
if (errno == EINTR) {
goto writev_retry;
}
error_msg_and_die("cannot write to remote file handle on %s:%d",
RemoteHost, RemotePort);
}
}
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);
}
static void quit_signal(int sig)
@@ -400,31 +421,31 @@ 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. */
static int serveConnection (char* tmpbuf, int n_read)
static int serveConnection(char *tmpbuf, int n_read)
{
char *p = tmpbuf;
while (p < tmpbuf + n_read) {
int pri = (LOG_USER | LOG_NOTICE);
char line[ MAXLINE + 1 ];
char line[MAXLINE + 1];
unsigned char c;
char *q = line;
while ( (c = *p) && q < &line[ sizeof (line) - 1 ]) {
while ((c = *p) && q < &line[sizeof(line) - 1]) {
if (c == '<') {
/* Parse the magic priority number. */
pri = 0;
while (isdigit (*(++p))) {
while (isdigit(*(++p))) {
pri = 10 * pri + (*p - '0');
}
if (pri & ~(LOG_FACMASK | LOG_PRIMASK)){
if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
pri = (LOG_USER | LOG_NOTICE);
}
} else if (c == '\n') {
*q++ = ' ';
} else if (iscntrl (c) && (c < 0177)) {
} else if (iscntrl(c) && (c < 0177)) {
*q++ = '^';
*q++ = c ^ 0100;
} else {
@@ -435,14 +456,14 @@ static int serveConnection (char* tmpbuf, int n_read)
*q = '\0';
p++;
/* Now log it */
logMessage (pri, line);
logMessage(pri, line);
}
return n_read;
}
#ifdef CONFIG_FEATURE_REMOTE_LOG
static void init_RemoteLog (void)
static void init_RemoteLog(void)
{
struct sockaddr_in remoteaddr;
@@ -463,19 +484,19 @@ 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
for future operations
/* 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("cannot connect to remote host %s:%d", RemoteHost, RemotePort);
if (0 != (connect(remotefd, (struct sockaddr *) &remoteaddr, len))) {
error_msg_and_die("cannot connect to remote host %s:%d", RemoteHost,
RemotePort);
}
}
#endif
static void doSyslogd (void) __attribute__ ((noreturn));
static void doSyslogd (void)
static void doSyslogd(void) __attribute__ ((noreturn));
static void doSyslogd(void)
{
struct sockaddr_un sunx;
socklen_t addrLength;
@@ -484,80 +505,85 @@ static void doSyslogd (void)
fd_set fds;
/* Set up signal handlers. */
signal (SIGINT, quit_signal);
signal (SIGTERM, quit_signal);
signal (SIGQUIT, quit_signal);
signal (SIGHUP, SIG_IGN);
signal (SIGCHLD, SIG_IGN);
signal(SIGINT, quit_signal);
signal(SIGTERM, quit_signal);
signal(SIGQUIT, quit_signal);
signal(SIGHUP, SIG_IGN);
signal(SIGCHLD, SIG_IGN);
#ifdef SIGCLD
signal (SIGCLD, SIG_IGN);
signal(SIGCLD, SIG_IGN);
#endif
signal (SIGALRM, domark);
alarm (MarkInterval);
signal(SIGALRM, domark);
alarm(MarkInterval);
/* Create the syslog file so realpath() can work. */
if (realpath (_PATH_LOG, lfile) != NULL)
unlink (lfile);
if (realpath(_PATH_LOG, lfile) != NULL) {
unlink(lfile);
}
memset (&sunx, 0, sizeof (sunx));
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_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) < 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);
strncpy(sunx.sun_path, lfile, sizeof(sunx.sun_path));
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) < 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);
}
#ifdef CONFIG_FEATURE_IPC_SYSLOG
if (circular_logging == TRUE ){
if (circular_logging == TRUE) {
ipcsyslog_init();
}
#endif
#ifdef CONFIG_FEATURE_REMOTE_LOG
if (doRemoteLog == TRUE){
if (doRemoteLog == TRUE) {
init_RemoteLog();
}
#endif
logMessage (LOG_SYSLOG | LOG_INFO, "syslogd started: " BB_BANNER);
logMessage(LOG_SYSLOG | LOG_INFO, "syslogd started: " BB_BANNER);
for (;;) {
FD_ZERO (&fds);
FD_SET (sock_fd, &fds);
FD_ZERO(&fds);
FD_SET(sock_fd, &fds);
if (select (sock_fd+1, &fds, NULL, NULL, NULL) < 0) {
if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
if (errno == EINTR) {
/* alarm may have happened. */
continue;
}
perror_msg_and_die ("select error");
perror_msg_and_die("select error");
}
if (FD_ISSET (sock_fd, &fds)) {
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) {
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");
perror_msg_and_die("UNIX socket error");
}
RELEASE_CONFIG_BUFFER (tmpbuf);
}/* FD_ISSET() */
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
@@ -581,8 +607,8 @@ extern int syslogd_main(int argc, char **argv)
#ifdef CONFIG_FEATURE_REMOTE_LOG
case 'R':
RemoteHost = xstrdup(optarg);
if ( (p = strchr(RemoteHost, ':'))){
RemotePort = atoi(p+1);
if ((p = strchr(RemoteHost, ':'))) {
RemotePort = atoi(p + 1);
*p = '\0';
}
doRemoteLog = TRUE;
@@ -617,8 +643,7 @@ extern int syslogd_main(int argc, char **argv)
umask(0);
#if ! defined(__uClinux__)
if (doFork == TRUE) {
if (daemon(0, 1) < 0)
if ((doFork == TRUE) && (daemon(0, 1) < 0)) {
perror_msg_and_die("daemon");
}
#endif