#include "busybox.h"
#include <paths.h>
-#include <stdbool.h>
#include <sys/un.h>
-/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
+/* SYSLOG_NAMES defined to pull some extra junk from syslog.h: */
+/* prioritynames[] and facilitynames[]. uclibc pulls those in _rwdata_! :( */
+
#define SYSLOG_NAMES
#include <sys/syslog.h>
#include <sys/uio.h>
-/* Path to the unix socket */
-static char lfile[MAXPATHLEN];
+#if ENABLE_FEATURE_REMOTE_LOG
+#include <netinet/in.h>
+#endif
-/* Path for the file where all log messages are written */
-static const char *logFilePath = "/var/log/messages";
+#if ENABLE_FEATURE_IPC_SYSLOG
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#endif
-#ifdef CONFIG_FEATURE_ROTATE_LOGFILE
-/* max size of message file before being rotated */
-static int logFileSize = 200 * 1024;
-/* number of rotated message files */
-static int logFileRotate = 1;
-#endif
+#define DEBUG 0
-/* interval between marks in seconds */
-static int MarkInterval = 20 * 60;
+/* MARK code is not very useful, is bloat, and broken:
+ * can deadlock if alarmed to make MARK while writing to IPC buffer
+ * (semaphores are down but do_mark routine tries to down them again) */
+#undef SYSLOGD_MARK
-/* level of messages to be locally logged */
-static int logLevel = 8;
+enum { MAX_READ = 256 };
-/* localhost's name */
-static char LocalHostName[64];
+/* Semaphore operation structures */
+struct shbuf_ds {
+ int32_t size; /* size of data written */
+ int32_t head; /* start of message list */
+ int32_t tail; /* end of message list */
+ char data[1]; /* data/messages */
+};
-#ifdef CONFIG_FEATURE_REMOTE_LOG
-#include <netinet/in.h>
-/* udp socket for logging to remote host */
-static int remotefd = -1;
-static struct sockaddr_in remoteaddr;
+/* Allows us to have smaller initializer. Ugly. */
+#define GLOBALS \
+ const char *logFilePath; \
+ int logFD; \
+ /* interval between marks in seconds */ \
+ /*int markInterval;*/ \
+ /* level of messages to be logged */ \
+ int logLevel; \
+USE_FEATURE_ROTATE_LOGFILE( \
+ /* max size of file before rotation */ \
+ unsigned logFileSize; \
+ /* number of rotated message files */ \
+ unsigned logFileRotate; \
+ unsigned curFileSize; \
+ smallint isRegular; \
+) \
+USE_FEATURE_REMOTE_LOG( \
+ /* udp socket for remote logging */ \
+ int remoteFD; \
+ len_and_sockaddr* remoteAddr; \
+) \
+USE_FEATURE_IPC_SYSLOG( \
+ int shmid; /* ipc shared memory id */ \
+ int s_semid; /* ipc semaphore id */ \
+ int shm_size; \
+ struct sembuf SMwup[1]; \
+ struct sembuf SMwdn[3]; \
+)
+
+struct init_globals {
+ GLOBALS
+};
+struct globals {
+ GLOBALS
+#if ENABLE_FEATURE_IPC_SYSLOG
+ struct shbuf_ds *shbuf;
+#endif
+ time_t last_log_time;
+ /* localhost's name */
+ char localHostName[64];
+
+ /* We recv into recvbuf... */
+ char recvbuf[MAX_READ];
+ /* ...then copy to parsebuf, escaping control chars */
+ /* (can grow x2 max) */
+ char parsebuf[MAX_READ*2];
+ /* ...then sprintf into printbuf, adding timestamp (15 chars),
+ * host (64), fac.prio (20) to the message */
+ /* (growth by: 15 + 64 + 20 + delims = ~110) */
+ char printbuf[MAX_READ*2 + 128];
+};
+
+static const struct init_globals init_data = {
+ .logFilePath = "/var/log/messages",
+ .logFD = -1,
+#ifdef SYSLOGD_MARK
+ .markInterval = 20 * 60,
+#endif
+ .logLevel = 8,
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ .logFileSize = 200 * 1024,
+ .logFileRotate = 1,
#endif
+#if ENABLE_FEATURE_REMOTE_LOG
+ .remoteFD = -1,
+#endif
+#if ENABLE_FEATURE_IPC_SYSLOG
+ .shmid = -1,
+ .s_semid = -1,
+ .shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), // default shm size
+ .SMwup = { {1, -1, IPC_NOWAIT} },
+ .SMwdn = { {0, 0}, {1, 0}, {1, +1} },
+#endif
+};
-/* options */
-static unsigned option_mask;
-/* Correct regardless of combination of CONFIG_xxx */
+#define G (*ptr_to_globals)
+
+
+/* Options */
enum {
OPTBIT_mark = 0, // -m
OPTBIT_nofork, // -n
USE_FEATURE_ROTATE_LOGFILE(,*opt_b) \
USE_FEATURE_REMOTE_LOG( ,*opt_R) \
USE_FEATURE_IPC_SYSLOG( ,*opt_C = NULL)
-#define OPTION_PARAM &opt_m, &logFilePath, &opt_l \
+#define OPTION_PARAM &opt_m, &G.logFilePath, &opt_l \
USE_FEATURE_ROTATE_LOGFILE(,&opt_s) \
USE_FEATURE_ROTATE_LOGFILE(,&opt_b) \
USE_FEATURE_REMOTE_LOG( ,&opt_R) \
USE_FEATURE_IPC_SYSLOG( ,&opt_C)
-#define MAXLINE 1024 /* maximum line length */
/* circular buffer variables/structures */
-#ifdef CONFIG_FEATURE_IPC_SYSLOG
+#if ENABLE_FEATURE_IPC_SYSLOG
#if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
#error Sorry, you must set the syslogd buffer size to at least 4KB.
#error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
#endif
-#include <sys/ipc.h>
-#include <sys/sem.h>
-#include <sys/shm.h>
-
/* our shared key */
#define KEY_ID ((long)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
-} *shbuf = 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
-static int shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024); // default shm size
-
static void ipcsyslog_cleanup(void)
{
- puts("Exiting syslogd!");
- if (shmid != -1) {
- shmdt(shbuf);
+ if (G.shmid != -1) {
+ shmdt(G.shbuf);
}
-
- if (shmid != -1) {
- shmctl(shmid, IPC_RMID, NULL);
+ if (G.shmid != -1) {
+ shmctl(G.shmid, IPC_RMID, NULL);
}
- if (s_semid != -1) {
- semctl(s_semid, 0, IPC_RMID, 0);
+ if (G.s_semid != -1) {
+ semctl(G.s_semid, 0, IPC_RMID, 0);
}
}
static void ipcsyslog_init(void)
{
- if (shbuf == NULL) {
- shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023);
- if (shmid == -1) {
- bb_perror_msg_and_die("shmget");
- }
+ if (DEBUG)
+ printf("shmget(%lx, %d,...)\n", KEY_ID, G.shm_size);
- shbuf = shmat(shmid, NULL, 0);
- if (!shbuf) {
- bb_perror_msg_and_die("shmat");
- }
+ G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 1023);
+ if (G.shmid == -1) {
+ bb_perror_msg_and_die("shmget");
+ }
- shbuf->size = shm_size - sizeof(*shbuf);
- shbuf->head = shbuf->tail = 0;
+ G.shbuf = shmat(G.shmid, NULL, 0);
+ if (!G.shbuf) {
+ bb_perror_msg_and_die("shmat");
+ }
- // we'll trust the OS to set initial semval to 0 (let's hope)
- s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
- if (s_semid == -1) {
- if (errno == EEXIST) {
- s_semid = semget(KEY_ID, 2, 0);
- if (s_semid == -1) {
- bb_perror_msg_and_die("semget");
- }
- } else {
- bb_perror_msg_and_die("semget");
- }
+ G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data);
+ G.shbuf->head = G.shbuf->tail = 0;
+
+ // we'll trust the OS to set initial semval to 0 (let's hope)
+ G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
+ if (G.s_semid == -1) {
+ if (errno == EEXIST) {
+ G.s_semid = semget(KEY_ID, 2, 0);
+ if (G.s_semid != -1)
+ return;
}
- } else {
- printf("Buffer already allocated just grab the semaphore?");
+ bb_perror_msg_and_die("semget");
}
}
-/* write message to buffer */
-static void circ_message(const char *msg)
+/* Write message to shared mem buffer */
+static void log_to_shmem(const char *msg, int len)
{
- int l = strlen(msg) + 1; /* count the whole message w/ '\0' included */
- const char * const fail_msg = "Can't find the terminator token%s?\n";
+ int old_tail, new_tail;
+ char *c;
- if (semop(s_semid, SMwdn, 3) == -1) {
+ if (semop(G.s_semid, G.SMwdn, 3) == -1) {
bb_perror_msg_and_die("SMwdn");
}
- /*
- * Circular Buffer Algorithm:
+ /* Circular Buffer Algorithm:
* --------------------------
- *
- * Start-off w/ empty buffer of specific size SHM_SIZ
- * Start filling it up w/ messages. I use '\0' as separator to break up messages.
- * This is also very handy since we can do printf on message.
- *
- * Once the buffer is full we need to get rid of the first message in buffer and
- * 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.
- *
- * Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
- * a threadsafe way of handling shared memory operations.
+ * tail == position where to store next syslog message.
+ * head == position of next message to retrieve ("print").
+ * if head == tail, there is no "unprinted" messages left.
+ * head is typically advanced by separate "reader" program,
+ * but if there isn't one, we have to do it ourself.
+ * messages are NUL-separated.
*/
- if ((shbuf->tail + l) < shbuf->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 (shbuf->tail < shbuf->head) {
- if ((shbuf->tail + l) >= shbuf->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!
- */
- /* we need to know how many bytes we are overwriting to make enough room */
- int k = shbuf->tail + l - shbuf->head;
- char *c =
- memchr(shbuf->data + shbuf->head + k, '\0',
- shbuf->size - (shbuf->head + k));
- if (c != NULL) { /* do a sanity check just in case! */
- /* we need to convert pointer to offset + skip the '\0'
- since we need to point to the beginning of the next message */
- shbuf->head = c - shbuf->data + 1;
- /* 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(fail_msg,"");
- shbuf->head = 0;
- }
+ len++; /* length with NUL included */
+ again:
+ old_tail = G.shbuf->tail;
+ new_tail = old_tail + len;
+ if (new_tail < G.shbuf->size) {
+ /* No need to move head if shbuf->head <= old_tail,
+ * else... */
+ if (old_tail < G.shbuf->head && G.shbuf->head <= new_tail) {
+ /* ...need to move head forward */
+ c = memchr(G.shbuf->data + new_tail, '\0',
+ G.shbuf->size - new_tail);
+ if (!c) /* no NUL ahead of us, wrap around */
+ c = memchr(G.shbuf->data, '\0', old_tail);
+ if (!c) { /* still nothing? point to this msg... */
+ G.shbuf->head = old_tail;
+ } else {
+ /* convert pointer to offset + skip NUL */
+ G.shbuf->head = c - G.shbuf->data + 1;
}
}
-
- /* in other cases no overflows have been done yet, so we don't care! */
- /* we should be ok to append the message now */
- strncpy(shbuf->data + shbuf->tail, msg, l); /* append our message */
- shbuf->tail += l; /* count full message w/ '\0' terminating char */
+ /* store message, set new tail */
+ memcpy(G.shbuf->data + old_tail, msg, len);
+ G.shbuf->tail = new_tail;
} else {
- /* we need to break up the message and "circle" it around */
- char *c;
- int k = shbuf->tail + l - shbuf->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(shbuf->data + k, '\0', shbuf->size - k);
-
- if (c != NULL) { /* if we don't have '\0'??? weird!!! */
- /* move head pointer */
- shbuf->head = c - shbuf->data + 1;
-
- /* now write the first part of the message */
- strncpy(shbuf->data + shbuf->tail, msg, l - k - 1);
-
- /* ALWAYS terminate end of buffer w/ '\0' */
- shbuf->data[shbuf->size - 1] = '\0';
-
- /* now write out the rest of the string to the beginning of the buffer */
- strcpy(shbuf->data, &msg[l - k - 1]);
-
- /* we need to place the TAIL at the end of the message */
- shbuf->tail = k + 1;
- } else {
- printf(fail_msg, " from the beginning");
- shbuf->head = shbuf->tail = 0; /* reset buffer, since it's probably corrupted */
+ /* we need to break up the message and wrap it around */
+ /* k == available buffer space ahead of old tail */
+ int k = G.shbuf->size - old_tail - 1;
+ if (G.shbuf->head > old_tail) {
+ /* we are going to overwrite head, need to
+ * move it out of the way */
+ c = memchr(G.shbuf->data, '\0', old_tail);
+ if (!c) { /* nothing? point to this msg... */
+ G.shbuf->head = old_tail;
+ } else { /* convert pointer to offset + skip NUL */
+ G.shbuf->head = c - G.shbuf->data + 1;
+ }
}
-
+ /* copy what fits to the end of buffer, and repeat */
+ memcpy(G.shbuf->data + old_tail, msg, k);
+ msg += k;
+ len -= k;
+ G.shbuf->tail = 0;
+ goto again;
}
- if (semop(s_semid, SMwup, 1) == -1) {
+ if (semop(G.s_semid, G.SMwup, 1) == -1) {
bb_perror_msg_and_die("SMwup");
}
-
+ if (DEBUG)
+ printf("head:%d tail:%d\n", G.shbuf->head, G.shbuf->tail);
}
#else
void ipcsyslog_cleanup(void);
void ipcsyslog_init(void);
-void circ_message(const char *msg);
-#endif /* CONFIG_FEATURE_IPC_SYSLOG */
+void log_to_shmem(const char *msg);
+#endif /* 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)));
-static void message(char *fmt, ...)
+static void log_locally(char *msg)
{
- int fd = -1;
struct flock fl;
- va_list arguments;
+ int len = strlen(msg);
+
+#if ENABLE_FEATURE_IPC_SYSLOG
+ if ((option_mask32 & OPT_circularlog) && G.shbuf) {
+ log_to_shmem(msg, len);
+ return;
+ }
+#endif
+ if (G.logFD >= 0) {
+ time_t cur;
+ time(&cur);
+ if (G.last_log_time != cur) {
+ G.last_log_time = cur; /* reopen log file every second */
+ close(G.logFD);
+ goto reopen;
+ }
+ } else {
+ reopen:
+ G.logFD = device_open(G.logFilePath, O_WRONLY | O_CREAT
+ | O_NOCTTY | O_APPEND | O_NONBLOCK);
+ if (G.logFD < 0) {
+ /* cannot open logfile? - print to /dev/console then */
+ int fd = device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
+ if (fd < 0)
+ fd = 2; /* then stderr, dammit */
+ full_write(fd, msg, len);
+ if (fd != 2)
+ close(fd);
+ return;
+ }
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ {
+ struct stat statf;
+
+ G.isRegular = (fstat(G.logFD, &statf) == 0 && (statf.st_mode & S_IFREG));
+ /* bug (mostly harmless): can wrap around if file > 4gb */
+ G.curFileSize = statf.st_size;
+ }
+#endif
+ }
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 1;
+ fl.l_type = F_WRLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
-#ifdef CONFIG_FEATURE_IPC_SYSLOG
- if ((option_mask & OPT_circularlog) && shbuf) {
- char b[1024];
-
- va_start(arguments, fmt);
- vsnprintf(b, sizeof(b) - 1, fmt, arguments);
- va_end(arguments);
- circ_message(b);
-
- } else
-#endif
- fd = device_open(logFilePath, O_WRONLY | O_CREAT
- | O_NOCTTY | O_APPEND | O_NONBLOCK);
- if (fd >= 0) {
- fl.l_type = F_WRLCK;
- fcntl(fd, F_SETLKW, &fl);
-
-#ifdef CONFIG_FEATURE_ROTATE_LOGFILE
- if (ENABLE_FEATURE_ROTATE_LOGFILE && logFileSize > 0 ) {
- struct stat statf;
- int r = fstat(fd, &statf);
- if (!r && (statf.st_mode & S_IFREG)
- && (lseek(fd,0,SEEK_END) > logFileSize)) {
- if (logFileRotate > 0) {
- int i = strlen(logFilePath) + 4;
- char oldFile[i];
- char newFile[i];
- for (i=logFileRotate-1; i>0; i--) {
- sprintf(oldFile, "%s.%d", logFilePath, i-1);
- sprintf(newFile, "%s.%d", logFilePath, i);
- rename(oldFile, newFile);
- }
- sprintf(newFile, "%s.%d", logFilePath, 0);
- fl.l_type = F_UNLCK;
- fcntl(fd, F_SETLKW, &fl);
- close(fd);
- rename(logFilePath, newFile);
- fd = device_open(logFilePath,
- O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
- O_NONBLOCK);
- fl.l_type = F_WRLCK;
- fcntl(fd, F_SETLKW, &fl);
- } else {
- ftruncate(fd, 0);
- }
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ if (G.logFileSize && G.isRegular && G.curFileSize > G.logFileSize) {
+ if (G.logFileRotate) { /* always 0..99 */
+ int i = strlen(G.logFilePath) + 3 + 1;
+ char oldFile[i];
+ char newFile[i];
+ i = G.logFileRotate - 1;
+ /* rename: f.8 -> f.9; f.7 -> f.8; ... */
+ while (1) {
+ sprintf(newFile, "%s.%d", G.logFilePath, i);
+ if (i == 0) break;
+ sprintf(oldFile, "%s.%d", G.logFilePath, --i);
+ rename(oldFile, newFile);
}
+ /* newFile == "f.0" now */
+ rename(G.logFilePath, newFile);
+ fl.l_type = F_UNLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
+ close(G.logFD);
+ goto reopen;
}
-#endif
- va_start(arguments, fmt);
- vdprintf(fd, fmt, arguments);
- va_end(arguments);
- fl.l_type = F_UNLCK;
- fcntl(fd, F_SETLKW, &fl);
- close(fd);
- } else {
- /* Always send console messages to /dev/console so people will see them. */
- fd = device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
- if (fd >= 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);
- }
+ ftruncate(G.logFD, 0);
}
+ G.curFileSize +=
+#endif
+ full_write(G.logFD, msg, len);
+ fl.l_type = F_UNLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
}
-static void logMessage(int pri, char *msg)
+static void parse_fac_prio_20(int pri, char *res20)
{
- time_t now;
- char *timestamp;
- char res[20];
CODE *c_pri, *c_fac;
if (pri != 0) {
c_fac = facilitynames;
- while (c_fac->c_name && !(c_fac->c_val == LOG_FAC(pri) << 3))
- c_fac++;
- c_pri = prioritynames;
- while (c_pri->c_name && !(c_pri->c_val == LOG_PRI(pri)))
- c_pri++;
- if (c_fac->c_name == NULL || c_pri->c_name == NULL) {
- snprintf(res, sizeof(res), "<%d>", pri);
- } else {
- snprintf(res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
+ while (c_fac->c_name) {
+ if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
+ c_fac++; continue;
+ }
+ /* facility is found, look for prio */
+ c_pri = prioritynames;
+ while (c_pri->c_name) {
+ if (c_pri->c_val != LOG_PRI(pri)) {
+ c_pri++; continue;
+ }
+ snprintf(res20, 20, "%s.%s",
+ c_fac->c_name, c_pri->c_name);
+ return;
+ }
+ /* prio not found, bail out */
+ break;
}
+ snprintf(res20, 20, "<%d>", pri);
}
+}
- if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
- msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') {
+/* len parameter is used only for "is there a timestamp?" check.
+ * NB: some callers cheat and supply 0 when they know
+ * that there is no timestamp, short-cutting the test. */
+static void timestamp_and_log(int pri, char *msg, int len)
+{
+ char *timestamp;
+
+ if (len < 16 || msg[3] != ' ' || msg[6] != ' '
+ || msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
+ ) {
+ time_t now;
time(&now);
timestamp = ctime(&now) + 4;
- timestamp[15] = '\0';
} else {
timestamp = msg;
- timestamp[15] = '\0';
msg += 16;
}
+ timestamp[15] = '\0';
+
+ /* Log message locally (to file or shared mem) */
+ if (!ENABLE_FEATURE_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
+ if (LOG_PRI(pri) < G.logLevel) {
+ if (option_mask32 & OPT_small)
+ sprintf(G.printbuf, "%s %s\n", timestamp, msg);
+ else {
+ char res[20];
+ parse_fac_prio_20(pri, res);
+ sprintf(G.printbuf, "%s %s %s %s\n", timestamp, G.localHostName, res, msg);
+ }
+ log_locally(G.printbuf);
+ }
+ }
+}
+
+static void split_escape_and_log(char *tmpbuf, int len)
+{
+ char *p = tmpbuf;
- /* todo: supress duplicates */
+ tmpbuf += len;
+ while (p < tmpbuf) {
+ char c;
+ char *q = G.parsebuf;
+ int pri = (LOG_USER | LOG_NOTICE);
-#ifdef CONFIG_FEATURE_REMOTE_LOG
- if (option_mask & OPT_remotelog) {
- char line[MAXLINE + 1];
- /* trying connect the socket */
- if (-1 == remotefd) {
- remotefd = socket(AF_INET, SOCK_DGRAM, 0);
- }
- /* if we have a valid socket, send the message */
- if (-1 != remotefd) {
- snprintf(line, sizeof(line), "<%d>%s", pri, msg);
- /* send message to remote logger, ignore possible error */
- sendto(remotefd, line, strlen(line), 0,
- (struct sockaddr *) &remoteaddr, sizeof(remoteaddr));
+ if (*p == '<') {
+ /* Parse the magic priority number */
+ pri = bb_strtou(p + 1, &p, 10);
+ if (*p == '>') p++;
+ if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
+ pri = (LOG_USER | LOG_NOTICE);
+ }
}
- }
- if (option_mask & OPT_locallog)
-#endif
- {
- /* now spew out the message to wherever it is supposed to go */
- if (pri == 0 || LOG_PRI(pri) < logLevel) {
- if (option_mask & OPT_small)
- message("%s %s\n", timestamp, msg);
- else
- message("%s %s %s %s\n", timestamp, LocalHostName, res, msg);
+ while ((c = *p++)) {
+ if (c == '\n')
+ c = ' ';
+ if (!(c & ~0x1f)) {
+ *q++ = '^';
+ c += '@'; /* ^@, ^A, ^B... */
+ }
+ *q++ = c;
}
+ *q = '\0';
+ /* Now log it */
+ timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
}
}
static void quit_signal(int sig)
{
- logMessage(LOG_SYSLOG | LOG_INFO, "System log daemon exiting.");
- unlink(lfile);
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"syslogd exiting", 0);
+ puts("syslogd exiting");
if (ENABLE_FEATURE_IPC_SYSLOG)
ipcsyslog_cleanup();
-
exit(1);
}
-static void domark(int sig)
-{
- if (MarkInterval > 0) {
- logMessage(LOG_SYSLOG | LOG_INFO, "-- MARK --");
- alarm(MarkInterval);
- }
-}
-
-/* This must be a #define, since when CONFIG_DEBUG 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)
+#ifdef SYSLOGD_MARK
+static void do_mark(int sig)
{
- char *p = tmpbuf;
-
- while (p < tmpbuf + n_read) {
-
- int pri = (LOG_USER | LOG_NOTICE);
- int num_lt = 0;
- char line[MAXLINE + 1];
- unsigned char c;
- char *q = line;
-
- while ((c = *p) && q < &line[sizeof(line) - 1]) {
- if (c == '<' && num_lt == 0) {
- /* Parse the magic priority number. */
- num_lt++;
- 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';
- p++;
- /* Now log it */
- logMessage(pri, line);
+ if (G.markInterval) {
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"-- MARK --", 0);
+ alarm(G.markInterval);
}
- return n_read;
}
+#endif
-static void doSyslogd(void) ATTRIBUTE_NORETURN;
-static void doSyslogd(void)
+static void do_syslogd(void) ATTRIBUTE_NORETURN;
+static void do_syslogd(void)
{
struct sockaddr_un sunx;
- socklen_t addrLength;
-
int sock_fd;
fd_set fds;
+ char *dev_log_name;
- /* Set up signal handlers. */
+ /* Set up signal handlers */
signal(SIGINT, quit_signal);
signal(SIGTERM, quit_signal);
signal(SIGQUIT, quit_signal);
#ifdef SIGCLD
signal(SIGCLD, SIG_IGN);
#endif
- signal(SIGALRM, domark);
- alarm(MarkInterval);
-
- /* Create the syslog file so realpath() can work. */
- if (realpath(_PATH_LOG, lfile) != NULL) {
- unlink(lfile);
- }
+#ifdef SYSLOGD_MARK
+ signal(SIGALRM, do_mark);
+ alarm(G.markInterval);
+#endif
memset(&sunx, 0, sizeof(sunx));
sunx.sun_family = AF_UNIX;
- strncpy(sunx.sun_path, lfile, sizeof(sunx.sun_path));
- sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
- addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
- if (bind(sock_fd, (struct sockaddr *) &sunx, addrLength) < 0) {
- bb_perror_msg_and_die("cannot connect to socket %s", lfile);
+ strcpy(sunx.sun_path, "/dev/log");
+
+ /* Unlink old /dev/log or object it points to. */
+ /* (if it exists, bind will fail) */
+ logmode = LOGMODE_NONE;
+ dev_log_name = xmalloc_readlink_or_warn("/dev/log");
+ logmode = LOGMODE_STDIO;
+ if (dev_log_name) {
+ int fd = xopen(".", O_NONBLOCK);
+ xchdir("/dev");
+ /* we do not check whether this is a link also */
+ unlink(dev_log_name);
+ fchdir(fd);
+ close(fd);
+ safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
+ free(dev_log_name);
+ } else {
+ unlink("/dev/log");
}
- if (chmod(lfile, 0666) < 0) {
- bb_perror_msg_and_die("cannot set permission on %s", lfile);
+ sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
+ xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
+
+ if (chmod("/dev/log", 0666) < 0) {
+ bb_perror_msg_and_die("cannot set permission on /dev/log");
}
- if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask & OPT_circularlog)) {
+ if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask32 & OPT_circularlog)) {
ipcsyslog_init();
}
- logMessage(LOG_SYSLOG | LOG_INFO, "syslogd started: " "BusyBox v" BB_VER );
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO,
+ (char*)"syslogd started: BusyBox v" BB_VER, 0);
for (;;) {
FD_ZERO(&fds);
if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
if (errno == EINTR) {
- /* alarm may have happened. */
+ /* alarm may have happened */
continue;
}
bb_perror_msg_and_die("select");
if (FD_ISSET(sock_fd, &fds)) {
int i;
-#if MAXLINE > BUFSIZ
-# define TMP_BUF_SZ BUFSIZ
-#else
-# define TMP_BUF_SZ MAXLINE
-#endif
-#define tmpbuf bb_common_bufsiz1
-
- if ((i = recv(sock_fd, tmpbuf, TMP_BUF_SZ, 0)) > 0) {
- tmpbuf[i] = '\0';
- serveConnection(tmpbuf, i);
- } else {
+ i = recv(sock_fd, G.recvbuf, MAX_READ - 1, 0);
+ if (i <= 0)
bb_perror_msg_and_die("UNIX socket error");
+ /* TODO: maybe suppress duplicates? */
+#if ENABLE_FEATURE_REMOTE_LOG
+ /* We are not modifying log messages in any way before send */
+ /* Remote site cannot trust _us_ anyway and need to do validation again */
+ if (G.remoteAddr) {
+ if (-1 == G.remoteFD) {
+ G.remoteFD = socket(G.remoteAddr->sa.sa_family, SOCK_DGRAM, 0);
+ }
+ if (-1 != G.remoteFD) {
+ /* send message to remote logger, ignore possible error */
+ sendto(G.remoteFD, G.recvbuf, i, MSG_DONTWAIT,
+ &G.remoteAddr->sa, G.remoteAddr->len);
+ }
}
- } /* FD_ISSET() */
- } /* for main loop */
+#endif
+ G.recvbuf[i] = '\0';
+ split_escape_and_log(G.recvbuf, i);
+ } /* FD_ISSET() */
+ } /* for */
}
-
+int syslogd_main(int argc, char **argv);
int syslogd_main(int argc, char **argv)
{
char OPTION_DECL;
char *p;
+ PTR_TO_GLOBALS = memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data));
+
/* do normal option parsing */
- option_mask = getopt32(argc, argv, OPTION_STR, OPTION_PARAM);
- if (option_mask & OPT_mark) MarkInterval = atoi(opt_m) * 60; // -m
- //if (option_mask & OPT_nofork) // -n
- //if (option_mask & OPT_outfile) // -O
- if (option_mask & OPT_loglevel) { // -l
- logLevel = atoi(opt_l);
- /* Valid levels are between 1 and 8 */
- if (logLevel < 1 || logLevel > 8)
- bb_show_usage();
- }
- //if (option_mask & OPT_small) // -S
+ opt_complementary = "=0"; /* no non-option params */
+ getopt32(argc, argv, OPTION_STR, OPTION_PARAM);
+#ifdef SYSLOGD_MARK
+ if (option_mask32 & OPT_mark) // -m
+ G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
+#endif
+ //if (option_mask32 & OPT_nofork) // -n
+ //if (option_mask32 & OPT_outfile) // -O
+ if (option_mask32 & OPT_loglevel) // -l
+ G.logLevel = xatou_range(opt_l, 1, 8);
+ //if (option_mask32 & OPT_small) // -S
#if ENABLE_FEATURE_ROTATE_LOGFILE
- if (option_mask & OPT_filesize) logFileSize = atoi(opt_s) * 1024; // -s
- if (option_mask & OPT_rotatecnt) { // -b
- logFileRotate = atoi(opt_b);
- if (logFileRotate > 99) logFileRotate = 99;
- }
+ if (option_mask32 & OPT_filesize) // -s
+ G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
+ if (option_mask32 & OPT_rotatecnt) // -b
+ G.logFileRotate = xatou_range(opt_b, 0, 99);
#endif
#if ENABLE_FEATURE_REMOTE_LOG
- if (option_mask & OPT_remotelog) { // -R
- int port = 514;
- char *host = xstrdup(opt_R);
- p = strchr(host, ':');
- if (p) {
- port = atoi(p + 1);
- *p = '\0';
- }
- remoteaddr.sin_family = AF_INET;
- /* FIXME: looks ip4-specific. need to do better */
- remoteaddr.sin_addr = *(struct in_addr *) *(xgethostbyname(host)->h_addr_list);
- remoteaddr.sin_port = htons(port);
- free(host);
+ if (option_mask32 & OPT_remotelog) { // -R
+ G.remoteAddr = xhost2sockaddr(opt_R, 514);
}
- //if (option_mask & OPT_locallog) // -L
+ //if (option_mask32 & OPT_locallog) // -L
#endif
#if ENABLE_FEATURE_IPC_SYSLOG
- if (option_mask & OPT_circularlog) { // -C
- if (opt_C) {
- int buf_size = atoi(opt_C);
- if (buf_size >= 4)
- shm_size = buf_size * 1024;
- }
- }
+ if (opt_C) // -Cn
+ G.shm_size = xatoul_range(opt_C, 4, INT_MAX/1024) * 1024;
#endif
/* If they have not specified remote logging, then log locally */
- if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask & OPT_remotelog))
- option_mask |= OPT_locallog;
+ if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_remotelog))
+ option_mask32 |= OPT_locallog;
/* Store away localhost's name before the fork */
- gethostname(LocalHostName, sizeof(LocalHostName));
- p = strchr(LocalHostName, '.');
+ gethostname(G.localHostName, sizeof(G.localHostName));
+ p = strchr(G.localHostName, '.');
if (p) {
*p = '\0';
}
- umask(0);
-
- if (!(option_mask & OPT_nofork)) {
+ if (!(option_mask32 & OPT_nofork)) {
#ifdef BB_NOMMU
- vfork_daemon_rexec(0, 1, argc, argv, "-n");
+ if (!re_execed)
+ vfork_daemon_rexec(0, 1, argv);
#else
- xdaemon(0, 1);
+ bb_daemonize();
#endif
}
- doSyslogd();
-
- return EXIT_SUCCESS;
+ umask(0);
+ do_syslogd();
+ /* return EXIT_SUCCESS; */
}
projects / oweals / busybox.git / blobdiff