Added log rotation based on file size to the RotateLog support utility.

Bradley Nicholes · Bradley Nicholes · commit 5401e88f41d8 · 2002-06-12T21:46:50.000Z
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95619 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/CHANGES b/CHANGES
@@ -1,6 +1,9 @@
 
 Changes with Apache 2.0.38
 
+  *) Added log rotation based on file size to the RotateLog support
+     utility. [Brad Nicholes]
+
   *) Fix some casting in mod_rewrite which broke random maps.
      PR 9770  [Allan Edwards, Greg Ames, Jeff Trawick]
 
diff --git a/support/rotatelogs.c b/support/rotatelogs.c
@@ -94,14 +94,16 @@
 int main (int argc, const char * const argv[])
 {
     char buf[BUFSIZE], buf2[MAX_PATH], errbuf[ERRMSGSZ];
-    int tLogEnd = 0, tRotation, utc_offset = 0;
+    int tLogEnd = 0, tRotation = 0, utc_offset = 0;
+    unsigned int sRotation = 0;
     int nMessCount = 0;
     apr_size_t nRead, nWrite;
     int use_strftime = 0;
     int now;
     const char *szLogRoot;
     apr_file_t *f_stdin, *nLogFD = NULL, *nLogFDprev = NULL;
     apr_pool_t *pool;
+    char *ptr = NULL;
 
     apr_app_initialize(&argc, &argv, NULL);
     atexit(apr_terminate);
@@ -110,7 +112,7 @@ int main (int argc, const char * const argv[])
     if (argc < 3 || argc > 4) {
         fprintf(stderr,
                 "Usage: %s <logfile> <rotation time in seconds> "
-                "[offset minutes from UTC]\n\n",
+                "[offset minutes from UTC] or <rotation size in megabytes>\n\n",
                 argv[0]);
 #ifdef OS2
         fprintf(stderr,
@@ -120,24 +122,40 @@ int main (int argc, const char * const argv[])
         fprintf(stderr,
                 "Add this:\n\nTransferLog \"|%s /some/where 86400\"\n\n",
                 argv[0]);
+        fprintf(stderr,
+                "or \n\nTransferLog \"|%s /some/where 5M\"\n\n", argv[0]);
 #endif
         fprintf(stderr,
                 "to httpd.conf. The generated name will be /some/where.nnnn "
                 "where nnnn is the\nsystem time at which the log nominally "
-                "starts (N.B. this time will always be a\nmultiple of the "
-                "rotation time, so you can synchronize cron scripts with it).\n"
-                "At the end of each rotation time a new log is started.\n");
+                "starts (N.B. if using a rotation time,\nthe time will always "
+                "be a multiple of the rotation time, so you can synchronize\n"
+                "cron scripts with it). At the end of each rotation time or "
+                "when the file size\nis reached a new log is started.\n");
         exit(1);
     }
 
     szLogRoot = argv[1];
-    if (argc >= 4) {
-        utc_offset = atoi(argv[3]) * 60;
+
+    ptr = strchr (argv[2], 'M');
+    if (ptr) {
+        if (*(ptr+1) == '\0') {
+            sRotation = atoi(argv[2]) * 1048576;
+        }
+        if (sRotation == 0) {
+            fprintf(stderr, "Invalid rotation size parameter\n");
+            exit(1);
+        }
     }
-    tRotation = atoi(argv[2]);
-    if (tRotation <= 0) {
-        fprintf(stderr, "Rotation time must be > 0\n");
-        exit(6);
+    else {
+        if (argc >= 4) {
+            utc_offset = atoi(argv[3]) * 60;
+        }
+        tRotation = atoi(argv[2]);
+        if (tRotation <= 0) {
+            fprintf(stderr, "Rotation time must be > 0\n");
+            exit(6);
+        }
     }
 
     use_strftime = (strchr(szLogRoot, '%') != NULL);
@@ -150,17 +168,44 @@ int main (int argc, const char * const argv[])
         nRead = sizeof(buf);
         if (apr_file_read(f_stdin, buf, &nRead) != APR_SUCCESS)
             exit(3);
-        now = (int)(apr_time_now() / APR_USEC_PER_SEC) + utc_offset;
         if (nRead == 0)
             exit(3);
-        if (nLogFD != NULL && (now >= tLogEnd || nRead < 0)) {
-            nLogFDprev = nLogFD;
-            nLogFD = NULL;
+        if (tRotation) {
+            now = (int)(apr_time_now() / APR_USEC_PER_SEC) + utc_offset;
+            if (nLogFD != NULL && (now >= tLogEnd || nRead < 0)) {
+                nLogFDprev = nLogFD;
+                nLogFD = NULL;
+            }
+        }
+        else if (sRotation) {
+            apr_finfo_t finfo;
+            unsigned int current_size = -1;
+
+            if ((nLogFD != NULL) && 
+                (apr_file_info_get(&finfo, APR_FINFO_SIZE, nLogFD) == APR_SUCCESS)) {
+                current_size = finfo.size;
+            }
+
+            if (current_size > sRotation || nRead < 0) {
+                nLogFDprev = nLogFD;
+                nLogFD = NULL;
+            }
         }
+        else {
+            fprintf(stderr, "No rotation time or size specified\n");
+            exit(2);
+        }
+
         if (nLogFD == NULL) {
-            int tLogStart = (now / tRotation) * tRotation;
+            int tLogStart;
+                
+            if (tRotation)
+                tLogStart = (now / tRotation) * tRotation;
+            else
+                tLogStart = apr_time_now() / APR_USEC_PER_SEC;
+
             if (use_strftime) {
-		apr_time_t tNow = tLogStart * APR_USEC_PER_SEC;
+		        apr_time_t tNow = tLogStart * APR_USEC_PER_SEC;
                 apr_time_exp_t e;
                 apr_size_t rs;
 
