1 files changed, 48 insertions, 1 deletions

diff --git a/sysklogd/syslogd.c b/sysklogd/syslogd.c
index 3ba239882..74b242c42 100644
--- a/sysklogd/syslogd.c
+++ b/sysklogd/syslogd.c
@@ -58,6 +58,14 @@ static char lfile[MAXPATHLEN];
 
 static const char *logFilePath = __LOG_FILE;
 
+#ifdef CONFIG_FEATURE_ROTATE_LOGFILE
+/* max size of message file bevor being rotated */
+static int logFileSize = 200 * 1024;
+
+/* number of rotated message files */
+static int logFileRotate = 1;
+#endif
+
 /* interval between marks in seconds */
 static int MarkInterval = 20 * 60;
 
@@ -305,6 +313,36 @@ static void message(char *fmt, ...)
                                                          O_NONBLOCK)) >= 0) {
                 fl.l_type = F_WRLCK;
                 fcntl(fd, F_SETLKW, &fl);
+#ifdef CONFIG_FEATURE_ROTATE_LOGFILE
+                if ( 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;
+                                        char oldFile[(strlen(logFilePath)+3)], newFile[(strlen(logFilePath)+3)];
+                                        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 );
+                                }
+                        }
+                }
+#endif
                 va_start(arguments, fmt);
                 vdprintf(fd, fmt, arguments);
                 va_end(arguments);
@@ -578,7 +616,7 @@ extern int syslogd_main(int argc, char **argv)
         char *p;
 
         /* do normal option parsing */
-        while ((opt = getopt(argc, argv, "m:nO:R:LC::")) > 0) {
+        while ((opt = getopt(argc, argv, "m:nO:s:b:R:LC::")) > 0) {
                 switch (opt) {
                 case 'm':
                         MarkInterval = atoi(optarg) * 60;
@@ -589,6 +627,15 @@ extern int syslogd_main(int argc, char **argv)
                 case 'O':
                         logFilePath = optarg;
                         break;
+#ifdef CONFIG_FEATURE_ROTATE_LOGFILE
+                case 's':
+                        logFileSize = atoi(optarg) * 1024;
+                        break;
+                case 'b':
+                        logFileRotate = atoi(optarg);
+                        if( logFileRotate > 99 ) logFileRotate = 99;
+                        break;
+#endif
 #ifdef CONFIG_FEATURE_REMOTE_LOG
                 case 'R':
                         RemoteHost = bb_xstrdup(optarg);